Motor positioning torque measuring device based on static torque sensor

Abstract

The utility model relates to a motor positioning torque measuring device based on a static torque sensor. The motor positioning torque measuring device comprises a base unit and a driving rotation unit. The base unit comprises a mounting base plate, an upper mounting plate, an upper mounting plate adjusting mechanism, a product positioning plate and a static torque sensor, the upper mounting plate is mounted on the mounting base plate through the upper mounting plate adjusting mechanism, the static torque sensor is mounted on the mounting base plate, the product positioning plate is mounted on the upper mounting plate, and a motor to be tested is mounted on the product positioning plate; the driving rotation unit comprises a mounting base, a motor fixing base, a connecting piece, an adapter and a driving motor, the mounting base is mounted on the mounting substrate, the motor fixing base is mounted in the mounting base, the driving motor is mounted on the motor fixing base, one end of the adapter is connected with the motor fixing base, and the other end of the adapter is connected with the static torque sensor; one end of the connecting piece is connected with the to-be-tested motor, and the other end is connected with the driving motor. Compared with the prior art, the utility model has the advantages of high precision, low cost and the like.

Description

Technical Field

[0001] This utility model relates to a motor positioning torque measuring device, and more particularly to a motor positioning torque measuring device based on a static torque sensor. Background Technology

[0002] Motor positioning torque, also known as reluctance torque or cogging torque, refers to the electromagnetic torque generated by the interaction between the permanent magnet and the cogging teeth of the iron core when the motor is not energized. It is an inherent physical phenomenon of motors.

[0003] The current method for measuring motor positioning torque in the industry is represented by Sugawara of Japan. It uses dynamic torque sensors, which are difficult to manufacture and expensive. The dynamic torque sensor is connected to the motor output shaft, the motor body is fixed, and a power source and transmission mechanism are set up to rotate the motor output shaft. The torque of the rotating motor output shaft is measured by the dynamic torque sensor. This measurement method is limited by the structure of the mechanism, the accuracy of the sensor, and the difficulty of manufacturing. The smaller the positioning torque of the motor being measured, the higher the requirements for the structure of the mechanism and the accuracy of the sensor.

[0004] A search of Chinese Patent Publication No. CN218156757U reveals a closed-loop motor dynamic testing fixture, specifically comprising a base plate, a dynamic torque sensor box disposed in the middle of the base plate, a torque chamber disposed at one end of the dynamic torque sensor box, and a motor mounting base disposed at the other end. Vibration sensors are disposed at each of the four corners of the bottom of the motor mounting base. A first adjustment component is disposed on the surface of the motor mounting base, and a second adjustment component is disposed above the motor mounting base, with the first and second adjustment components perpendicularly arranged. However, this existing motor testing process also uses a dynamic torque sensor, which suffers from high testing costs.

[0005] Therefore, how to further reduce testing costs while ensuring measurement accuracy has become a technical problem that needs to be solved. Utility Model Content

[0006] The purpose of this invention is to overcome the defects of the prior art and provide a motor positioning torque measuring device based on a static torque sensor.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] According to one aspect of the present invention, a motor positioning torque measuring device based on a static torque sensor is provided. The device is connected to the motor under test, and the measuring device includes a base unit and a drive rotation unit.

[0009] The base unit includes a mounting base plate, an upper mounting plate, an upper mounting plate adjustment mechanism, a product positioning plate, and a static torque sensor. The upper mounting plate is mounted on the mounting base plate via the upper mounting plate adjustment mechanism. The static torque sensor is mounted on the mounting base plate. The product positioning plate is mounted on the upper mounting plate. The motor under test is mounted on the product positioning plate.

[0010] The drive rotary unit includes a mounting base, a motor mounting base, a connecting component, an adapter component, and a drive motor. The mounting base is mounted on a mounting base plate, the motor mounting base is installed inside the mounting base, the drive motor is mounted on the motor mounting base, one end of the adapter component is connected to the motor mounting base, and the other end is connected to a static torque sensor. One end of the connecting component is connected to the motor to be tested, and the other end is connected to the drive motor.

[0011] As a preferred technical solution, the upper mounting plate adjustment mechanism includes a bushing, a guide rod, and a fixing ring. The bushing is mounted on the mounting base plate, the guide rod is fixed on the upper mounting plate, and the bushing and the fixing ring are respectively sleeved on the guide rod.

[0012] As a preferred technical solution, the product positioning plate is provided with limit blocks on both sides to limit the rotation of the stationary part of the motor under test during the measurement process.

[0013] As a preferred technical solution, the static torque sensor is provided with a first positioning pin that cooperates with the adapter to constrain the relative rotation between the adapter and the static torque sensor.

[0014] As a preferred technical solution, the mounting base plate is provided with a waist-shaped groove that mates with the first positioning pin for circumferential positioning of the static torque sensor, and the adapter is provided with a limiting groove that mates with the first positioning pin.

[0015] As a preferred technical solution, the drive rotation unit also includes a bearing mounted on the mounting base for positioning the rotation center of the motor mounting base.

[0016] As a preferred technical solution, the drive motor is fixed to the motor mounting bracket by locking bolts.

[0017] As a preferred technical solution, the adapter is engaged with the limiting groove of the motor mounting base via a second positioning pin, which is used to constrain the relative rotation between the motor mounting base and the adapter.

[0018] As a preferred technical solution, one end of the connecting member is circumferentially fixed to the output shaft of the drive motor, and the other end is connected to the rotation shaft of the motor under test.

[0019] As a preferred technical solution, one end of the drive motor is connected to the connecting component via a reducer, and the other end transmits the reaction torque received to the static torque sensor below via a connecting seat.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1) This utility model realizes the real-time acquisition of external dynamic torque using a static torque sensor, causing relative rotational motion between the stationary and rotating parts of the motor. The static torque sensor is connected to the fixed base of the drive rotation unit (or the relatively stationary part of the drive rotation unit or its adapter). Based on the relationship that the action torque and reaction torque are equal, the external torque can be measured in real time. It has the advantages of simpler structure, high accuracy, high stability and low cost.

[0022] 2) The torque sensor of the force measuring unit of this utility model is a high-precision and low-cost static torque sensor. This is completely different from the dynamic torque sensor, which requires the force measuring axis to rotate together with the rotating parts of the product being tested. Based on the relationship that the action torque and reaction torque are equal, this utility model can realize the real-time acquisition of dynamic rotation torque, which greatly reduces the cost while ensuring measurement accuracy.

[0023] 3) Existing technologies use dynamic torque sensors that are difficult to manufacture and expensive. This invention uses static torque sensors that are easy to manufacture and inexpensive, and can achieve the same measurement accuracy. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the base unit of this utility model;

[0025] Figure 2 This is a cross-sectional view of the static torque sensor of this utility model mounted on the base unit;

[0026] Figure 3 This is a top view of the static torque sensor of this utility model mounted on the base unit;

[0027] Figure 4(a) is a schematic diagram of the structure of the drive rotary unit of this utility model;

[0028] Figure 4(b) is a partial internal sectional view of the drive rotary unit of this utility model;

[0029] Figure 5 This is a schematic diagram of the connection drive unit and the motor under test in the connection assembly of this utility model.

[0030] Where 1 is the base unit, 2 is the drive rotation unit, 3 is the motor under test, and 31 is the rotation shaft;

[0031] 11 is the mounting base plate, 111 is the waist-shaped groove, 12 is the bushing, 13 is the guide rod, 14 is the fixing ring, 15 is the upper mounting plate, 16 is the product positioning plate, 17 is the limit block, 18 is the first positioning pin, and 19 is the static torque sensor.

[0032] 21 is the mounting base, 22 is the motor mounting base, 23 is the connecting part, 24 is the output shaft, 25 is the bearing, 26 is the second positioning pin, 27 is the adapter, 28 is the connecting seat, 29 is the locking bolt, 210 is the reducer, and 211 is the drive motor. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0034] like Figure 1 As shown in Figure 4(a), a motor positioning torque measuring device based on a static torque sensor is connected to the motor 3 under test. The measuring device includes a base unit 1 and a drive rotation unit 2.

[0035] The base unit is the basic component for installing the device, providing limit positioning for the product under test and facilitating the placement and removal of the product under test. The static torque sensor used for measurement can be directly installed on the base unit. The drive rotation unit is installed on the base unit. The connecting component on the base unit 1 connects the rotation drive of the drive rotation unit with the rotation component of the motor under test, so as to drive the rotation component of the motor under test to rotate together.

[0036] like Figure 1 As shown, the base unit 1 includes a mounting base plate 11, an upper mounting plate 15, an upper mounting plate adjustment mechanism, a product positioning plate 16, and a static torque sensor 19. The upper mounting plate 15 is mounted on the mounting base plate 11 through the upper mounting plate adjustment mechanism. The static torque sensor 19 is mounted on the mounting base plate 11. The product positioning plate 16 is mounted on the upper mounting plate 15. The motor under test 3 is mounted on the product positioning plate 16 for positioning the center position of the motor under test 3. The limiting blocks 17 on both sides are used to limit the rotation of the stationary part of the product during the measurement process.

[0037] The upper mounting plate adjustment mechanism includes a bushing 12, a guide rod 13, and a fixing ring 14. The bushing 12 is mounted on the mounting base plate 11, and the guide rod 13 is fixed on the upper mounting plate 15. The bushing 12 and the fixing ring 14 are respectively sleeved on the guide rod 13.

[0038] Mounting base plate 11 provides a mechanism mounting platform for the device. The relative position of bushing 12 and guide rod 13 is fixed. The height of upper mounting plate 15 can be adjusted by the bushing 12 to accommodate different products. Fixing ring 14 is used for limiting the height after adjustment.

[0039] like Figure 2 and Figure 3 This is a schematic diagram of the connection structure between the static positioning torque sensor and the mounting base plate 11 mentioned above. Figure 2 The static torque sensor shown has a first positioning pin 18 located below it, which is connected to... Figure 3 The mounting base plate 11 shown has a waist-shaped groove 111 that fits in, which limits the static torque sensor circumferentially so that it cannot rotate relative to the sensor.

[0040] As shown in Figures 4(a) and 4(b), the drive rotary unit 2 includes a mounting base 21, a motor mounting base 22, a connecting member 23, an adapter 27, and a drive motor 211. The mounting base 21 is mounted on the mounting base 11, the motor mounting base 22 is mounted inside the mounting base 21, and the drive motor 211 is mounted on the motor mounting base 22. One end of the adapter 27 is connected to the motor mounting base 22, and the other end is connected to the static torque sensor 19. One end of the connecting member 23 is connected to the motor 3 to be tested, and the other end is connected to the drive motor 211.

[0041] The drive rotary unit 2 also includes a bearing 25, which is mounted on the mounting base 21. The bearing can be a rolling bearing or other parts with a sufficiently small coefficient of friction that is less than the measured external torque. The purpose is to position the rotation center of the motor mounting base 22 installed therein.

[0042] The drive motor 211 (which may be a motor with a gearbox) is fixed to the motor mounting base 22 by locking bolts 29. Two second positioning pins 26 are installed on the top of the adapter 27 and cooperate with the limiting groove provided on the motor mounting base 22 to constrain the relative rotation of the motor mounting base 22 and the adapter 27. The lower part of the adapter 27 is provided with a limiting groove that cooperates with the positioning pins installed on the static torque sensor mentioned above, constraining the relative rotation of the adapter 27 and the static torque sensor. The mounting base 21 is provided with a drive line for driving the motor 211 to drive the motor. The connecting part 23 is used to transmit the rotational power of the drive motor 211 to the rotating part of the motor under test (which may be the motor shaft). Its lower end is circumferentially fixed to the output shaft 24 of the drive motor 211 and can rotate together with the output shaft 24 of the drive motor 211.

[0043] like Figure 5As shown, this is a schematic diagram of the structure of the drive rotary unit connected to the rotary component of the motor under test via a connecting member. The mounting base 21 of the drive rotary unit is fixed on the mounting base plate 11, and the rotation center of the drive rotary unit coincides with the axis of the static torque sensor of the base unit. The upper end of the connecting member 23 is connected to the rotation shaft 31 (motor shaft) of the motor under test 3, and the lower end of the connecting member 23 is connected to the output shaft of the drive motor 211. The rotating shaft 31 of the motor under test is driven to rotate together through the connecting member 23; the rotating drive motor 211 drives the rotating shaft 31 (motor shaft) of the motor under test 3 to rotate together through the connecting member 23. The rotor and stator of the motor under test generate an external torque (positioning torque) by relative rotation. The reaction torque of the external torque causes the mechanism to rotate, which is transmitted to the motor, motor mounting base, adapter, and static torque sensor of the driving rotating unit. The static torque sensor measures the external dynamic torque value in real time during the process, and then obtains the positioning torque value of the motor.

[0044] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A motor positioning torque measuring device based on a static torque sensor, the device being connected to the motor (3) under test, characterized in that, The measuring device includes a base unit (1) and a drive rotation unit (2); The base unit (1) includes a mounting base plate (11), an upper mounting plate (15), an upper mounting plate adjustment mechanism, a product positioning plate (16), and a static torque sensor (19). The upper mounting plate (15) is mounted on the mounting base plate (11) through the upper mounting plate adjustment mechanism. The static torque sensor (19) is mounted on the mounting base plate (11). The product positioning plate (16) is mounted on the upper mounting plate (15). The motor (3) under test is mounted on the product positioning plate (16). The drive rotary unit (2) includes a mounting base (21), a motor mounting base (22), a connecting member (23), an adapter (27), and a drive motor (211). The mounting base (21) is mounted on the mounting base (11). The motor mounting base (22) is installed inside the mounting base (21). The drive motor (211) is mounted on the motor mounting base (22). One end of the adapter (27) is connected to the motor mounting base (22), and the other end is connected to the static torque sensor (19). One end of the connecting member (23) is connected to the motor under test (3), and the other end is connected to the drive motor (211).

2. The motor positioning torque measuring device based on a static torque sensor according to claim 1, characterized in that, The upper mounting plate adjustment mechanism includes a bushing (12), a guide rod (13), and a fixing ring (14). The bushing (12) is mounted on the mounting base plate (11), and the guide rod (13) is fixed on the upper mounting plate (15). The bushing (12) and the fixing ring (14) are respectively sleeved on the guide rod (13).

3. The motor positioning torque measuring device based on a static torque sensor according to claim 1, characterized in that, The product positioning plate (16) is provided with limit blocks (17) on both sides to limit the rotation of the stationary part of the motor (3) under test during the measurement process.

4. The motor positioning torque measuring device based on a static torque sensor according to claim 1, characterized in that, The static torque sensor (19) is provided with a first positioning pin (18) that cooperates with the adapter (27) to constrain the adapter (27) and the static torque sensor (19) to rotate relative to each other.

5. The motor positioning torque measuring device based on a static torque sensor according to claim 4, characterized in that, The mounting base plate (11) is provided with a waist-shaped groove (111) that cooperates with the first positioning pin (18) for circumferential positioning of the static torque sensor (19), and the adapter (27) is provided with a limiting groove that cooperates with the first positioning pin (18).

6. The static torque sensor based motor positioning torque measurement device of claim 1, wherein, The drive rotation unit (2) also includes a bearing (25) mounted on the mounting base (21) for positioning the rotation center of the motor mounting base (22).

7. The motor positioning torque measuring device based on a static torque sensor according to claim 1, characterized in that, The drive motor (211) is fixed to the motor mounting base (22) by locking bolts (29).

8. The motor positioning torque measuring device based on a static torque sensor according to claim 1, characterized in that, The adapter (27) engages with the limiting groove of the motor mounting base (22) via the second positioning pin (26) to constrain the relative rotation between the motor mounting base (22) and the adapter (27).

9. The motor positioning torque measuring device based on a static torque sensor according to claim 1, characterized in that, One end of the connector (23) is circumferentially fixed to the output shaft (24) of the drive motor (211), and the other end is connected to the rotation shaft (31) of the motor (3) under test.

10. The motor positioning torque measuring device based on a static torque sensor according to claim 9, characterized in that, One end of the drive motor (211) is connected to the connecting member (23) through the reducer (210), and the other end transmits the reaction torque received to the static torque sensor (19) below through the connecting seat (28).

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