A motor performance testing device

Abstract

A motor performance testing device, comprising a lower support base, a first air cylinder is installed on the lower support base, the driving end of the first air cylinder is vertically upward, a lifting seat is installed on the output end of the first air cylinder, a servo motor is installed on the top of the lifting seat, the output shaft of the servo motor penetrates through the lifting seat downward and is installed with a shaft coupling, the shaft coupling is used to connect with the output shaft of the motor to be tested, a second air cylinder is installed on the bottom of the lower support base, the output end of the second air cylinder penetrates through the lower support base upward, a clamp is installed on the output end of the second air cylinder, the clamp is used to fix the shell of the motor to be tested. The motor to be tested of the motor performance testing device is coaxially connected with the servo motor through the shaft coupling, which can ensure the coaxiality requirement of the servo motor and the measured motor, the starting voltage and the cutoff voltage of the measured motor are output by recording the corresponding current through the current change of the servo motor when starting and stopping, so as to improve the test accuracy and ensure the safety of the personnel while reducing the operation steps of the detection personnel.

Description

Technical Field

[0001] This utility model relates to testing devices, and more particularly to a motor performance testing device. Background Technology

[0002] In the field of kitchen appliances, the performance of the electric motor used in range hoods directly affects their reliability and safety. Currently, voltage adaptability testing and overspeed testing are two key performance testing items for electric motors used in range hoods.

[0003] In voltage adaptability testing, existing technologies primarily employ manual adjustment of a voltage regulator. This involves raising and lowering the motor voltage within the 0V-250V range at a rate of 1V / s, manually observing the motor's starting and stopping status, and manually recording the starting and stopping voltages. This process needs to be repeated multiple times. This manual operation method has several drawbacks. First, it's difficult to precisely control the voltage adjustment rate at 1V / s, easily leading to testing errors. Furthermore, the constant contact with the regulator during testing poses a risk of electric shock. Second, the inspector must continuously monitor voltage changes and the motor's status throughout the testing period. Manual observation and data recording are inefficient and prone to omissions or errors, resulting in insufficient accuracy and reliability of the test results.

[0004] For overspeed testing, current technology involves fixing the motor to a fixture with bolts via a mounting plate, connecting it to a servo motor via a coupling, and using an external power-consuming carrier to dissipate the test current. This method is cumbersome to install and operate, and cannot guarantee the coaxiality of the tested motor shaft and the servo motor shaft, potentially damaging the servo motor. Furthermore, the stability of the bolted connection may be affected by vibration during high-speed motor operation, posing a safety hazard of motor loosening or even detachment. Additionally, the parameter matching of the external power-consuming carrier relies heavily on empirical settings, lacking a precise dynamic adjustment mechanism for current consumption. This may not effectively cope with the complex changes in motor current during the test, affecting the validity of the test results. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a motor performance testing device with high testing accuracy and reliable testing safety, in light of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a motor performance testing device, including a lower support base, characterized in that: a first cylinder is installed on the lower support base, the driving end of the first cylinder is vertically upward, a lifting base is installed on the output end of the first cylinder, a servo motor is installed on the top of the lifting base, the output shaft of the servo motor passes downward through the lifting base and is connected to a coupling, the coupling is used to connect with the output shaft of the motor under test, a second cylinder is installed at the bottom of the lower support base, the output end of the second cylinder passes upward through the lower support base, a clamp is installed at the output end of the second cylinder, the clamp is used to fix the housing of the motor under test.

[0007] Preferably, both the lower support and the lifting seat are horizontally arranged.

[0008] In order to coaxially connect and fix the output shaft of the test motor and the output shaft of the servo motor, the coupling has a locking hole. By tightening the screw in the locking hole, the output shafts of the servo motor and the output shaft of the motor under test are locked onto the coupling.

[0009] To ensure that the lifting platform can move smoothly, and thus ensure that the output shaft of the servo motor is always in a vertically downward position during the lifting process, there are two first cylinders, which are respectively located on the left and right sides of the fixture.

[0010] To protect the clamp, the outer periphery of the clamp is provided with an outer cover, and the bottom of the outer cover is fixed to the lower support.

[0011] The clamp can have various structures. Preferably, the clamp is a spring clamp. The bottom of the clamp has a connection hole that connects to the output end of the second cylinder. The upper part of the clamp forms a clamping arm for holding the motor under test. The inner peripheral wall of the clamping arm is formed with a limiting step for the motor under test to sit on.

[0012] To make the test device structure more stable, the bottom of the lower support base is equipped with four support feet, which are installed at the four corners of the lower support base.

[0013] Compared with existing designs, the advantages of this utility model are as follows: This motor performance testing device drives the lifting seat and servo motor to move synchronously up and down through a first cylinder mounted on the lower support base. The second cylinder on the lower support base drives the clamp to move up and down, and clamps and fixes the motor under test. Changing the motor under test is more convenient. The motor under test is coaxially connected to the servo motor through a coupling, which can ensure the coaxiality requirement of the servo motor and the motor under test. By observing the changes in current when the servo motor starts and stops, the corresponding current is recorded by the data acquisition card to output the starting voltage and cutting voltage of the motor under test. This can improve the accuracy of the test and ensure the safety of personnel while reducing the number of operation steps for the testing personnel. This device can perform overspeed tests and can also be connected to an external programmable regulated power supply for voltage adaptability tests. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the motor performance testing device according to an embodiment of the present invention;

[0015] Figure 2 for Figure 1 The front view of the motor testing device shown;

[0016] Figure 3 for Figure 1 A cross-sectional view of the motor testing device shown.

[0017] Figure 4 This is a schematic diagram of the structure of the spring clamp according to an embodiment of the present utility model. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 4 As shown, the motor performance testing device of this embodiment includes a lower support base 1, and four support feet 9 are installed at the bottom of the lower support base 1, which can make the testing device more stable. A first cylinder 2 is installed on the lower support base 1, with the drive end of the first cylinder 2 facing vertically upwards. A lifting seat 3 is installed on the output end of the first cylinder 2. Both the lower support base 1 and the lifting seat 3 are horizontally arranged.

[0020] A servo motor 4 is mounted on the top of the lifting base 3. The output shaft of the servo motor 4 passes downward through the lifting base 3 and is connected to a coupling 5. The coupling 5 is used to connect to the output shaft of the motor under test 10. The coupling 5 has a locking hole 51. By tightening screws in the locking hole 51, both the output shaft of the servo motor 4 and the output shaft of the motor under test 10 are locked onto the coupling 5.

[0021] Two first cylinders 2 are respectively located on the left and right sides of the clamp 7. Using two first cylinders 2, the lifting seat 3 and servo motor 4 can be driven to move smoothly, thus ensuring that the motor shaft of servo motor 4 is always in a vertically downward position, and that the motor shaft of servo motor 4 and the motor shaft of the motor under test 10 can be coaxially connected via coupling 5. A second cylinder 6 is installed at the bottom of the lower support 1. The output end of the second cylinder 6 passes upward through the lower support 1, and a clamp 7 is installed at the output end of the second cylinder 6. The clamp 7 is used to fix the housing of the motor under test 10. The outer periphery of the clamp 7 is located on the outer cover 8, and the bottom of the outer cover 8 is fixed to the lower support 1.

[0022] In this embodiment, the clamp 7 is a spring clamp 7. The bottom of the clamp 7 has a connection hole 71 that connects to the output end of the second cylinder 6. The upper part of the clamp 7 forms a clamping arm 72 for clamping the motor 10 under test. The inner peripheral wall of the clamping arm 72 is formed with a limiting step 73 for the motor 10 under test to sit on.

[0023] In this embodiment, the first cylinder 2 is a conventional SE standard cylinder, and the second cylinder 6 is an ACQ thin cylinder. When placing the test motor 10, the ACQ thin cylinder pulls down the clamp 7, causing the clamp 7 to deform and tighten the spring clamp, thereby fixing the test motor 10. Simultaneously, the two SE standard cylinders are used to control the rise and fall of the servo motor 4. When the piston rods of the first cylinder 2 and the second cylinder 6 are at their lowest position, i.e., at the bottom of their stroke, tightening the coupling screws on the coupling 5 ensures the coaxiality of the servo motor 4 and the test motor 10. When replacing the test motor 10, loosening the coupling screws allows the piston rods of the first cylinder 2 and the second cylinder 6 to rise upwards, i.e., at the top of their stroke, allowing the test motor 10 to be removed. The operation is very convenient.

[0024] During testing, the high-precision speed measurement function of servo motor 4 is used to detect the starting and stopping states of the motor under test 10. Simultaneously, a programmable regulated power supply is used to control the voltage rise and fall at a rate of 1V / s. When connected to the motor under test 10, if servo motor 4 detects a stable non-zero speed output, it can be determined that the motor under test 10 is in the starting and running state; if the detected speed is zero and remains unchanged for a period of time, it can be considered that the motor under test 10 is in the stationary state. Furthermore, by monitoring the current changes during the starting and stopping of servo motor 4, the corresponding current is recorded by a data acquisition card to output the starting and stopping voltages of the motor under test 10. This improves the accuracy of the test, reduces the number of steps required for testing personnel, and ensures personnel safety. This testing device can perform overspeed tests and can also be connected to an external programmable regulated power supply for voltage adaptability tests.

[0025] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A motor performance testing device, comprising a lower support base (1), characterized in that: A first cylinder (2) is installed on the lower support base (1). The drive end of the first cylinder (2) is vertically upward. A lifting base (3) is installed on the output end of the first cylinder (2). A servo motor (4) is installed on the top of the lifting base (3). The output shaft of the servo motor (4) passes downward through the lifting base (3) and is connected to a coupling (5). The coupling (5) is used to connect with the output shaft of the motor under test (10). A second cylinder (6) is installed at the bottom of the lower support base (1). The output end of the second cylinder (6) passes upward through the lower support base (1). A clamp (7) is installed at the output end of the second cylinder (6). The clamp (7) is used to fix the outer shell of the motor under test (10).

2. The motor performance testing device according to claim 1, characterized in that: Both the lower support (1) and the lifting seat (3) are horizontally arranged.

3. The motor performance testing device according to claim 1, characterized in that: The coupling (5) has a locking hole (51). By tightening the screw in the locking hole (51), the output shaft of the servo motor (4) and the output shaft of the motor under test (10) are locked onto the coupling (5).

4. The motor performance testing device according to claim 1, characterized in that: There are two first cylinders (2) and they are respectively located on the left and right sides of the clamp (7).

5. The motor performance testing device according to claim 1, characterized in that: The outer periphery of the clamp (7) is provided on the outer cover (8), and the bottom of the outer cover (8) is fixed on the lower support (1).

6. The motor performance testing device according to claim 1, characterized in that: The clamp (7) is a spring clamp (7). The bottom of the clamp (7) has a connection hole (71) that connects to the output end of the second cylinder (6). The upper part of the clamp (7) forms a clamping arm (72) for clamping the motor (10) under test. The inner peripheral wall of the clamping arm (72) is formed with a limiting step (73) for the motor (10) under test to sit on.

7. The motor performance testing device according to any one of claims 1 to 6, characterized in that: The bottom of the lower support base (1) is equipped with support feet (9), and there are 4 support feet (9) installed at the four corners of the lower support base (1).

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