Torque testing device for low-power high-rotating-speed motor

Abstract

The utility model relates to a motor torque testing device, in particular to a torque testing device for a low-power high-rotating-speed motor, and solves the technical problem that the conventional torque measuring equipment cannot be directly connected with the low-power high-rotating-speed motor. According to the torque testing device for the low-power high-rotating-speed motor, the connecting rope is wound around the pulley groove, a load is applied to the tested motor through friction force between the connecting rope and the pulley groove, torque output by the tested motor is converted into friction force acting on the pulley, and then the friction force is converted into gravity of the gravity element. The problem that a dynamometer cannot be directly connected to realize performance testing is solved, and the structure is relatively simple.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor torque testing device, concretely relates to a kind of low-power high-speed motor torque testing device. BACKGROUND

[0002] During production and manufacturing, the performance of motor needs to be tested, and torque is one of the key indicators to measure the output power of motor. Accurate measurement of the torque of motor can determine whether the motor meets the design requirements and quality standards, and ensure the reliability of motor performance.

[0003] Traditional motor torque testing usually relies on professional measuring equipment such as torque measuring instrument and dynamometer, which requires a relatively complex mechanical clamping structure, and is large in size and high in cost. However, permanent magnet DC motor, especially small-power high-speed micro motor, is small in size and difficult to match the existing mechanical clamping structure, and cannot be directly connected with torque measuring equipment. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the technical problem that existing torque measuring equipment cannot be directly connected with small-power high-speed motor, and provides a kind of low-power high-speed motor torque testing device.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] A kind of low-power high-speed motor torque testing device, characterized by: including connecting rope, pulley and gravity element;

[0007] The pulley is sleeved on the output shaft of the motor to be tested, and the pulley is fixedly connected with the output shaft of the motor to be tested and rotates with the output shaft of the motor to be tested;

[0008] The upper end of the connecting rope is fixed above the pulley, and the lower end is connected with the gravity element after winding the wheel groove of the pulley, and the motor to be tested uses the friction between the connecting rope and the wheel groove of the pulley to lift the gravity element;

[0009] The mass of the gravity element is adjustable;

[0010] The upper end of the connecting rope is in a taut state before testing, and the mass of the gravity element is adjusted during testing, and the test is completed when the upper end of the connecting rope is loose.

[0011] Further, it further includes photoelectric tachometer and reflective paper arranged on the outer end surface of pulley wheel body;

[0012] The photoelectric tachometer is arranged on the reflection light path of the reflective paper, for measuring the rotating speed of the motor to be tested, so as to monitor the current during the loading process of the motor to be tested.

[0013] Further, the connecting rope is wound around the wheel groove of the pulley for 2-3 turns.

[0014] Further, the connecting rope adopts a silk thread.

[0015] Further, the gravity element is a combined weight or a filled weight.

[0016] The utility model discloses a beneficial effect compared with prior art is:

[0017] The utility model provides a low -power high -speed motor torque testing arrangement adopts the connecting rope winding pulley wheel groove, and the friction between connecting rope and pulley wheel groove is used for the measured motor to add load, and the torque of the measured motor output is converted into the friction on pulley, and then is converted into the gravity of gravity element, solves the low -power high -speed motor and cannot directly connect torque testing arrangement and realizes torque test's problem, and the structure is relatively simple, and the cost is lower. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is structural schematic diagram of the embodiment of the application;

[0019] Figure 2 It is state schematic diagram when the embodiment of the application completes test;

[0020] The following is explained:

[0021] 1-connecting rope, 2-pulley, 3-gravity element, 4-measured motor, 5-reflective paper. DETAILED DESCRIPTION

[0022] In order to make the purpose, the advantages and the characteristics of the utility model more clear, the following is in combination with the drawings and specific embodiment to the low -power high -speed motor torque testing arrangement of the utility model is further detailedly explained.

[0023] A low -power high -speed motor torque testing arrangement, as shown in Figure 1 It includes connecting rope 1, pulley 2 and gravity element 3.Pulley 2 is sleeved on the output shaft of measured motor 4, and pulley 2 is fixedly connected with the output shaft of measured motor 4 and rotates with the output shaft of measured motor 4.Measured motor 4 adopts direct current power supply.The upper end of connecting rope 1 is fixed in the upper of pulley 2, and the lower end is connected with gravity element 3 after winding the wheel groove of pulley 2, and measured motor 4 uses the friction between connecting rope 1 and pulley 2 wheel groove to lift gravity element 3.The mass of gravity element 3 can be adjusted.The upper end of connecting rope 1 is in the taut state before testing, and the mass of gravity element 3 is adjusted when testing, and the test is completed when the upper end of connecting rope 1 appears loose.In the embodiment, connecting rope 1 winds pulley 2 wheel groove 3 times.Connecting rope 1 adopts silk thread, and gravity element 3 is combined weight or filled weight.

[0024] As shown in Figure 2As shown, if the rated speed and rated current are to be measured, the reflective paper 5 can be pasted on the outer end surface of the pulley 2, and the photoelectric tachometer is arranged on the reflected light path of the reflective paper 5. The photoelectric tachometer is used to measure the speed of the measured motor 4, so as to monitor the current of the measured motor 4 during the loading process.

[0025] The working principle of the small-power high-speed motor torque testing device provided by the embodiment is as follows:

[0026] After the measured motor 4 is powered on, the pulley 2 is driven to rotate, the gravitational element 3 is lifted through the friction between the connecting rope 1 and the pulley 2, and during the rotation of the pulley 2, the weight of the gravitational element 3 fully acts on the pulley 2. When the upper end of the connecting rope 1 appears loose, the measured motor 4 is disconnected, and the test is completed. Figure 2 As shown, the test is completed. The torque is calculated according to the relationship between the mass of the pulley 2 and the gravitational element 3, as shown in the following formula: torque (g.cm) = gravitational element mass (g) x pulley radius (cm).

[0027] During the test, the photoelectric tachometer emits a light beam to irradiate the surface of the pulley 2, and receives the reflected light of the reflective paper 5. Each time the light beam is reflected, it represents that the pulley 2 rotates one circle. The speed of the pulley 2 can be measured according to the number of signals received by the photoelectric tachometer per unit time. According to the speed of the pulley 2, the current during the loading process of the measured motor 4 can be calculated.

[0028] Finally, it should be noted that: the above embodiment is only used to illustrate the technical scheme of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiment, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiment, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the present application.

Claims

1. A torque testing device for a low-power, high-speed motor, characterized in that: It includes a connecting rope (1), a pulley (2) and a gravity element (3), as well as a photoelectric tachometer and a reflective paper (5) set on the outer end face of the pulley (2). The pulley (2) is mounted on the output shaft of the motor under test (4), and the pulley (2) is fixedly connected to the output shaft of the motor under test (4) and rotates with the output shaft of the motor under test (4); The upper end of the connecting rope (1) is fixed above the pulley (2), and the lower end is wound around the groove of the pulley (2) and connected to the gravity element (3). The motor (4) under test uses the friction between the connecting rope (1) and the groove of the pulley (2) to lift the gravity element (3). The mass of the gravity element (3) is adjustable; The photoelectric tachometer is set on the reflected light path of the reflective paper (5) to measure the rotation speed of the motor under test (4), thereby monitoring the current of the motor under test (4) during the loading process.

2. The torque testing device for a low-power, high-speed motor according to claim 1, characterized in that: The connecting rope (1) is wound around the groove of the pulley (2) 2-3 times.

3. The torque testing device for a low-power, high-speed motor according to claim 2, characterized in that: The connecting rope (1) is made of brocade thread.

4. The torque testing device for a low-power, high-speed motor according to claim 3, characterized in that: The gravity element (3) is a combined weight or a filled weight.

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