Motor positioning torque measuring device based on static torque sensor

Abstract

The invention 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 method has the advantages of high precision, low cost and the like.

Description

Technical Field

[0001] The present invention relates to a motor positioning torque measuring device, in particular to a motor positioning torque measuring device based on a static torque sensor. Background Art

[0002] The motor's detent torque, also known as reluctance torque or cogging torque, refers to the electromagnetic torque generated by the interaction between the permanent magnet and the iron core's cogging when the motor is not powered. It is an inherent physical phenomenon of the motor.

[0003] The existing method for measuring the positioning torque of motors in the industry is represented by Japan's Sugawara, which uses a dynamic torque sensor that is difficult to manufacture and expensive. The dynamic torque sensor is connected to the motor output shaft, and the motor body is fixed. Then a power source and a transmission mechanism are set to rotate the motor output shaft, and the dynamic torque sensor is used to measure the torque of the rotating motor output shaft. 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 number CN218156757U revealed a closed-loop motor dynamic test fixture, specifically comprising a base plate, a dynamic torque sensor box disposed in the middle of the base plate, a torque box disposed at one end of the dynamic torque sensor box, and a motor mount disposed at the other end. Vibration sensors are disposed at the four corners of the bottom of the motor mount, a first adjustment component is disposed on the surface of the motor mount, and a second adjustment component is disposed above the motor mount, with the first and second adjustment components being arranged perpendicularly. However, this existing motor testing process also utilizes dynamic torque sensors, which leads to high testing costs.

[0005] Therefore, how to further reduce the test cost while ensuring measurement accuracy has become a technical problem that needs to be solved. Summary of the Invention

[0006] The purpose of the present invention is to provide a motor positioning torque measurement device based on a static torque sensor in order to overcome the defects of the above-mentioned prior art.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] According to one aspect of the present invention, a motor positioning torque measurement device based on a static torque sensor is provided, the device being connected to a motor to be measured, the measurement device comprising a base unit and a drive rotation unit;

[0009] The base unit includes a mounting base, 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 through the upper mounting plate adjustment mechanism. The static torque sensor is mounted on the mounting base, the product positioning plate is mounted on the upper mounting plate, and the motor to be tested is mounted on the product positioning plate.

[0010] The driving rotation unit includes a mounting seat, a motor fixing seat, a connecting piece, an adapter and a driving motor. The mounting seat is installed on the mounting base, the motor fixing seat is installed in the mounting seat, and the driving motor is installed on the motor fixing seat. One end of the adapter is connected to the motor fixing seat, and the other end is connected to the static torque sensor. One end of the connecting piece is connected to the motor to be measured, and the other end is connected to the driving 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 fixing ring are respectively sleeved on the guide rod.

[0012] As a preferred technical solution, limit blocks are provided on both sides of the product positioning plate for limiting the rotation of the stationary part of the motor to be measured 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 and is used to constrain the adapter and the static torque sensor from rotating relative to each other.

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

[0015] As a preferred technical solution, the driving rotary unit further includes a bearing mounted on the mounting seat for positioning the rotation center of the motor fixing seat.

[0016] As a preferred technical solution, the drive motor is fixed to the motor fixing seat by means of locking bolts.

[0017] As a preferred technical solution, the adapter cooperates with the limiting groove of the motor fixing seat through a second positioning pin to constrain the motor fixing seat and the adapter from rotating relative to each other.

[0018] As a preferred technical solution, one end of the coupling is circumferentially fixed to the output shaft of the driving motor, and the other end is connected to the rotary shaft of the motor to be tested.

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

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

[0021] 1) The present invention realizes the real-time acquisition of external dynamic torque by using a static torque sensor, causes relative rotational motion between the stationary part and the rotating part of the motor, connects the static torque sensor to the fixed seat of the driving rotary unit (or the relatively stationary part of the driving rotary unit or its adapter), and based on the relationship that the action torque is equal to the reaction torque, the external torque can be measured in real time, which has the advantages of simpler structure, high precision, high stability and low cost.

[0022] 2) The torque sensor of the force measuring unit of the present invention adopts a static torque sensor with high precision and low price. It is completely different from the test process of the dynamic torque sensor in which the force measuring axis needs to rotate together with the rotating parts of the product being measured. Based on the relationship that the action torque is equal to the reaction torque, the present invention can realize real-time acquisition of dynamic rotational torque, greatly reducing costs while ensuring measurement accuracy.

[0023] 3) The existing technology uses a dynamic torque sensor that is difficult to manufacture and expensive. The present invention uses a static torque sensor that is easy to manufacture and inexpensive to manufacture, and can achieve equivalent measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the base unit of the present invention;

[0025] Figure 2 A cross-sectional view of the static torque sensor of the present invention mounted on a base unit;

[0026] Figure 3 A top view of the static torque sensor of the present invention mounted on a base unit;

[0027] FIG4( a ) is a schematic structural diagram of a driving rotary unit of the present invention;

[0028] FIG4( b ) is a partial internal cross-sectional view of the driving rotary unit of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the connection drive unit of the connection assembly of the present invention and the motor under test.

[0030] Among them, 1 is the base unit, 2 is the driving rotary unit, 3 is the motor to be tested, and 31 is the rotary axis;

[0031] 11 is the mounting base plate, 111 is the waist 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 a mounting base, 22 is a motor fixing base, 23 is a connecting piece, 24 is an output shaft, 25 is a bearing, 26 is a second positioning pin, 27 is an adapter, 28 is a connecting base, 29 is a locking bolt, 210 is a reducer, and 211 is a driving motor. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0034] like Figure 1 As shown in FIG4 , a motor positioning torque measuring device based on a static torque sensor is connected to a motor to be measured 3 , and the measuring device includes a base unit 1 and a driving rotary unit 2 ;

[0035] The base unit is the basic component for installing the device. It provides limit positioning for the product under test and facilitates the removal and placement of the product under test. The static torque sensor used for measurement can be directly installed on the base unit; the driving rotary unit is installed on the base unit. The coupling assembly on the base unit 1 connects the rotary drive of the driving rotary unit with the rotating part of the motor under test, thereby driving the rotating part 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 3 to be tested is mounted on the product positioning plate 16 to locate the center position of the motor 3 to be tested. The limit 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, the guide rod 13 is fixed on the upper mounting plate 15, and the bushing 12 and the fixing ring 14 are respectively sleeved on the guide rod 13.

[0038] The mounting base 11 provides a mechanical mounting platform for the device. The relative positions of the bushing 12 and the guide rod 13 are fixed. The height of the upper mounting plate 15 can be adjusted to suit different products through the bushing 12 that cooperates therewith. The fixing ring 14 is used to limit the height after adjustment.

[0039] like Figure 2 and Figure 3 Schematic diagram of the connection structure between the static positioning torque sensor and the mounting substrate 11. Figure 2 The first positioning pin 18 is provided below the static torque sensor. Figure 3 The waist-shaped groove 111 of the mounting base 11 shown cooperates to limit the circumferential position of the static torque sensor so that it cannot rotate relative to the sensor.

[0040] like Figure 4a As shown in Figure 4b, the driving rotation unit 2 includes a mounting base 21, a motor fixing base 22, a connecting piece 23, an adapter 27 and a driving motor 211. The mounting base 21 is installed on the mounting base 11, the motor fixing base 22 is installed in the mounting base 21, and the driving motor 211 is installed on the motor fixing base 22. One end of the adapter 27 is connected to the motor fixing base 22, and the other end is connected to the static torque sensor 19. One end of the connecting piece 23 is connected to the motor to be measured 3, and the other end is connected to the driving motor 211.

[0041] The driving rotary unit 2 also includes a bearing 25, which is mounted on the mounting seat 21. The bearing 25 can be a rolling bearing or a part of another form of bearing replacement with a friction coefficient that is sufficiently small and smaller than the measured external torque. The purpose is to locate the rotation center of the motor fixing seat 22 installed therein.

[0042] The driving motor 211 (which can be a motor with a gearbox) is fixed to the motor fixing seat 22 by a locking bolt 29. Two second positioning pins 26 are installed above the adapter 27, which cooperate with the limit grooves provided on the motor fixing seat 22 to constrain the motor fixing seat 22 and the adapter 27 to rotate relative to each other. A limit groove is provided below the adapter 27 to cooperate with the positioning pins installed on the static torque sensor to constrain the adapter 27 and the static torque sensor to rotate relative to each other; the mounting seat 21 will be provided with a driving line for the driving motor 211 to drive the motor; the connecting member 23 is used to transmit the rotational power of the driving motor 211 to the rotating part of the motor to be measured (which can be the motor shaft of the motor), and its lower end is circumferentially fixed to the output shaft 24 of the driving motor 211, and can rotate together with the output shaft 24 of the driving motor 211.

[0043] like Figure 5As shown in the figure, it is a structural schematic diagram of the driving rotary unit connected to the rotating part of the motor to be measured through a connecting member. The mounting base 21 of the driving rotary unit is fixed on the mounting base plate 11, and the rotation center of the driving 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 rotating shaft 31 (motor shaft) of the motor to be measured 3, and the lower end of the connecting member 23 is connected to the output shaft of the driving motor 211. The rotating shaft 31 of the motor to be tested is driven to rotate together through the connecting member 23; the driving motor 211 rotates and drives the rotating shaft 31 (motor shaft) of the motor to be tested 3 to rotate together through the connecting member 23, and the rotor and stator of the motor to be tested produce relative rotation to generate an external torque (positioning torque). The reaction torque of the external torque causes the mechanism to produce a rotation trend, which is transmitted to the motor, motor fixing seat, adapter, and static torque sensor of the driving rotation unit. The static torque sensor measures the external dynamic torque value in real time to obtain the positioning torque value of the motor.

[0044] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention 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 the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A motor positioning torque measuring device based on a static torque sensor, the device being connected to a motor to be measured (3), characterized in that: The measuring device comprises a base unit (1) and a driving rotary unit (2); The base unit (1) comprises 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) via 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); and the motor to be tested (3) is mounted on the product positioning plate (16); The driving rotary unit (2) comprises a mounting seat (21), a motor fixing seat (22), a coupling member (23), an adapter member (27) and a driving motor (211); the mounting seat (21) is mounted on a mounting base (11); the motor fixing seat (22) is mounted in the mounting seat (21); the driving motor (211) is mounted on the motor fixing seat (22); one end of the adapter member (27) is connected to the motor fixing seat (22) and the other end is connected to a static torque sensor (19); one end of the coupling member (23) is connected to a motor to be measured (3) and the other end is connected to the driving motor (211).

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

3. The motor positioning torque measurement device based on a static torque sensor according to claim 1, characterized in that: Limit blocks (17) for limiting the rotation of the stationary part of the motor (3) to be measured during the measurement process are provided on both sides of the product positioning plate (16).

4. The motor positioning torque measurement 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) and is used to constrain the adapter (27) and the static torque sensor (19) from rotating relative to each other.

5. The motor positioning torque measurement 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) and is used for circumferential limiting of the static torque sensor (19). The adapter (27) is provided with a limiting groove that cooperates with the first positioning pin (18).

6. The motor positioning torque measurement device based on a static torque sensor according to claim 1, characterized in that: The driving rotary unit (2) further comprises a bearing (25) mounted on the mounting seat (21) and used for positioning the rotary center of the motor fixing seat (22).

7. The motor positioning torque measurement device based on a static torque sensor according to claim 1, characterized in that: The driving motor (211) is fixed to the motor fixing seat (22) via a locking bolt (29).

8. The motor positioning torque measurement device based on a static torque sensor according to claim 1, characterized in that: The adapter (27) cooperates with the limiting groove of the motor fixing seat (22) through the second positioning pin (26) to constrain the motor fixing seat (22) and the adapter (27) to rotate relative to each other.

9. The motor positioning torque measurement device based on a static torque sensor according to claim 1, characterized in that: One end of the coupling member (23) is circumferentially fixed to the output shaft (24) of the driving motor (211), and the other end is connected to the rotary shaft (31) of the motor to be tested (3).

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

Images