Coupling and motor test device

Abstract

The present invention discloses a coupling and a motor test device. The coupling includes: a first connecting portion having a connecting shaft for external connection; a second connecting portion having a connecting shaft for external connection; and elastic columns. The elastic columns are disposed between the first connecting portion and the second connecting portion, and both ends of the elastic columns are embedded in the first connecting portion and the second connecting portion. When the first connecting portion and the second connecting portion rotate axially, they are softly connected through the elastic columns. The coupling of the present invention uses elastic columns to transmit torque, which can play a buffering role, achieve the protection of equipment and motors, and avoid the impact on the equipment when the motor starts. Moreover, the connecting disk is made of aluminum, which isolates the mutual magnetic field influence among the magnetic powder dynamometer, the sensors on the test bench, and the internal sensors of the motor, protecting the signal of the speed sensor inside the motor from being distorted.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and particularly relates to a coupling and a motor test device. Background Art

[0002] Motor testing is a process of testing the performance of a motor after it leaves the factory. Usually, a coupling is required to connect the output shaft of the motor to the input shaft of the testing machine. However, most traditional couplings are rigid couplings. When the motor starts, the output torque is directly transmitted to the input shaft of the testing machine, which is likely to cause a load impact on the testing machine and is not conducive to the protection of the equipment and the motor. Summary of the Invention

[0003] In view of the problems in the prior art, the present invention proposes the following technical solutions:

[0004] A coupling, comprising:

[0005] A first connection part, having a connection shaft for external connection;

[0006] A second connection part, having a connection shaft for external connection;

[0007] An elastic column, the elastic column is arranged between the first connection part and the second connection part, and both ends of the elastic column are embedded in the first connection part and the second connection part. When the first connection part and the second connection part rotate axially, they are softly connected through the elastic column.

[0008] Preferably, the first connection part includes a first connection disk and a first connection shaft fixed at one end of the first connection disk. A first cavity for accommodating the elastic column is arranged on the other end face of the first connection disk. At least two first cavities are provided, and the centers of the first cavities are distributed on a circle with the axis of the first connection shaft as the center of the circle;

[0009] The second connection part includes a second connection disk and a second connection shaft fixed at one end of the second connection disk. A second cavity for accommodating the elastic column is arranged on the other end face of the second connection shaft. At least two second cavities are provided, and the centers of the second cavities are distributed on a circle with the axis of the second connection shaft as the center of the circle;

[0010] The number and distribution state of the second cavities are the same as those of the first cavities.

[0011] Preferably, the first connection disk and the second connection disk are disks.

[0012] Preferably, the first connection disk and the second connection disk are aluminum disks.

[0013] Preferably, the elastic column is a nylon rod.

[0014] The present invention also provides a motor test device, comprising:

[0015] Test bench;

[0016] Dynamometer, fixed on the test bench;

[0017] Sensor, fixed on the test bench, and the sensor is connected to the dynamometer through the above coupling;

[0018] Adjusting seat, arranged on the test bench for fixing the adjusting motor, and the sensor is connected to the motor through the above coupling.

[0019] Preferably, the adjusting seat includes:

[0020] Lower movable block, slidably arranged on the test bench;

[0021] Upper movable block, arranged above the lower movable block, and the lower movable block and the upper movable block are matched through an inclined plane;

[0022] Sliding plate, slidably arranged on the upper movable block left and right;

[0023] Rotating plate, the rotating plate is slidably arranged on the sliding plate front and back, and the rotating plate and the sliding plate can rotate relatively.

[0024] Preferably, two laser instruments are arranged on the test bench, and the two laser instruments emit a horizontal ray and a vertical ray respectively, and both the horizontal ray and the vertical ray pass through the axis of the coupling.

[0025] Preferably, the position adjustment method before the motor test is as follows:

[0026] S1. Place the motor on the adjusting seat, and fix a coaxial cylindrical magnet on the output shaft of the motor;

[0027] S2. Fix a magnetic pointer assembly on the first connection disk of the coupling, and the magnetic pointer assembly has a needle body coaxial with the first connection shaft, and the needle body can be attracted by the magnet;

[0028] S3. Roughly adjust the motor so that the height and levelness of the motor are basically the same as those of the coupling, and the output shaft of the motor is basically coaxial with the first connection shaft, and the magnet is close to the needle body but does not touch it;

[0029] S4. Fine-tune the motor so that the needle body changes the inclination state and both the horizontal ray and the vertical ray coincide with the needle body;

[0030] S5. After the adjustment is completed, remove the magnetic pointer assembly and the magnet, assemble and fix the coupling and the motor, and start the motor for testing.

[0031] The beneficial effects of the present invention are:

[0032] (1) The coupling of the present invention uses elastic columns to transmit torque, which can play a buffering role, protect the equipment and the motor, and avoid the impact on the equipment when the motor starts;

[0033] (2) In the coupling of the present invention, the connecting plate is processed from aluminum, which isolates the mutual magnetic field influence of the magnetic powder dynamometer, the sensors of the test bench and the sensors inside the motor, and protects the signal of the speed sensor inside the motor from being distorted;

[0034] (3) In the motor test device of the present invention, by setting the adjusting seat and the laser instrument, and cooperating with the magnetic pointer assembly and the magnet, the output shaft of motors of different models and different sizes can be quickly adjusted to be coaxial with the coupling, and then the test can be quickly assembled and fixed to be completed. Description of the Drawings

[0035] Figure 1 Shows an exploded state schematic diagram of the coupling;

[0036] Figure 2 Shows an assembled state schematic diagram of the coupling;

[0037] Figure 3 Shows a structural state schematic diagram of the coupling;

[0038] Figure 4 Shows a structural schematic diagram of the first connecting part;

[0039] Figure 5 Shows a structural schematic diagram of the second connecting part;

[0040] Figure 6 Shows a structural schematic diagram of the test device;

[0041] Figure 7 Shows an arrangement schematic diagram of the laser instrument on the test device;

[0042] Figure 8 Shows a state schematic diagram of the magnet fixed on the motor output shaft;

[0043] Figure 9 Shows a state schematic diagram of the cooperation between the magnet and the magnetic pointer assembly;

[0044] Figure 10 Shows a structural schematic diagram of the adjusting seat;

[0045] Figure 11 Shows a structural schematic diagram of the upper movable block;

[0046] Figure 12 Shows a structural schematic diagram of the sliding plate;

[0047] Figure 13 Shows a structural schematic diagram of the connecting piece. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0049] Embodiment

[0050] Figure 1 Fig. shows a schematic exploded view of the coupling. Figure 2 Fig. shows a schematic assembled view of the coupling; according to Figure 1 and Figure 2 , the coupling includes a first connection part 10, a second connection part 20 and elastic columns 30. The first connection part 10 and the second connection part 20 are non-fixedly and softly connected through the elastic columns 30. The first connection part 10 and the second connection part 20 are respectively fixedly connected to two power shafts. For example, the first connection part 10 is connected to the output shaft of the motor, and the second connection part 20 is connected to the output shaft of the dynamometer. The torque is transmitted between the first connection part 10 and the second connection part 20 of the coupling through the elastic columns 30, which can play a buffering role and realize the protection of the equipment and the motor, and avoid the impact on the equipment when the motor starts.

[0051] Figure 3 Fig. shows a schematic structural view of the coupling; the first connection part 10 includes a first connection shaft 11 and a first connection disk 12. The first connection shaft 11 is fixed on the first connection disk 12. A first cavity 13 for accommodating the elastic columns 30 is provided on the first connection disk 12. The first connection shaft 11 and the first cavity 13 are respectively arranged on opposite sides of the first connection disk 12, and at least two first cavities 13 are provided. The centers of these first cavities 13 are distributed on a circle with the axis of the first connection shaft 11 as the center, as shown in Figure 4 shown.

[0052] The above-mentioned first connection disk 12 can be set as a disk coaxial with the first connection shaft 11 to ensure the circumferential uniformity and improve the axial stability during rotation.

[0053] Referring to Figure 3 , having the same structure as the first connection part 10, the second connection part 20 includes a second connection shaft 21 and a second connection disk 22. The second connection shaft 21 is fixed on the second connection disk 22. A second cavity 23 for accommodating the elastic columns 30 is provided on the second connection disk 22. The second connection shaft 21 and the second cavity 23 are respectively arranged on opposite sides of the second connection disk 22, and at least two second cavities 23 are provided. The centers of these second cavities 23 are distributed on a circle with the axis of the second connection shaft 21 as the center, as shown in Figure 5As shown, the number and distribution state of the second cavity 23 are consistent with those of the first cavity 13 to meet the purpose that the first connecting portion 10 and the second connecting portion 20 can be softly connected through the elastic columns 30. The soft connection described in this embodiment can also be referred to as "flexible connection", which is a way different from rigid connection. When the first connecting portion 10 starts to rotate, it will drive the elastic columns 30 to be distorted and deformed. The second connecting portion 20 will not rotate instantaneously along with the first connecting portion 10, but starts slowly. Therefore, it can play a buffering role to protect the equipment and the motor and avoid the impact on the equipment when the motor starts.

[0054] The elastic column 30 is a nylon rod.

[0055] The coupling in this embodiment is applied to the motor test scenario. The motor test scenario requires the use of a test device, including a test bench 100, a dynamometer 110, a sensor 120, a coupling 130, and existing components such as data lines and power lines necessary for the test process. The coupling 130 has the functions and structural features described above.

[0056] Figure 6 The structural schematic diagram of the test device is shown. The dynamometer 110, the sensor 120, and the motor 200 to be measured are all installed on the test bench 100. The dynamometer 110 and the sensor 120 are connected through the coupling 130, and the sensor 120 and the motor 200 are connected through the coupling 130. In addition, the dynamometer 110 and the sensor 120 are both fixedly installed on the test bench 100.

[0057] In order to adapt to motors 200 of different models and sizes, an adjustment seat 140 is further provided on the test bench 100. The adjustment seat 140 is used to adjust and install the motor 200 so that the output shaft of the motor 200 can be coaxially connected to the sensor 120.

[0058] In this embodiment, both the first connection disk 12 and the second connection disk 22 are processed from aluminum, which cuts off the mutual magnetic field influence between the dynamometer 110, the sensor 120 on the test bench, and the internal sensor of the motor 200, and protects the signal of the speed sensor inside the motor from being distorted. The dynamometer 110 usually uses a magnetic powder dynamometer.

[0059] In order to solve the problem of rapid assembly and fixation of the test device for motors 200 of different models and sizes, the following solution is provided in this embodiment:

[0060] The adjustment seat 140 is set to have the functions of lifting adjustment and horizontal sliding adjustment. The horizontal sliding includes axial sliding and radial sliding adjustment along the motor axis;

[0061] Install two laser instruments 150 on the test bench 100. The two laser instruments 150 emit a horizontal ray 151 and a vertical ray 152 respectively. Both the horizontal ray 151 and the vertical ray 152 pass through the axis of the coupling 130. Since the coupling 130 is fixed to the test bench 100, the horizontal ray 151 and the vertical ray 152 are also fixed and pre-adjusted, as Figure 7 shown.

[0062] Based on the above description, the method for quickly adjusting the position and assembling the motor 200 is as follows:

[0063] S1. Place the motor 200 on the adjusting seat 140. A coaxial cylindrical magnet 161 is fixed on the output shaft of the motor 200, as Figure 8 shown;

[0064] S2. Fix the magnetic pointer assembly 162 on the first connecting disc 12 of the coupling 130. The magnetic pointer assembly 162 has a needle body 163 coaxial with the first connecting shaft 11, and the needle body 163 can be attracted by the magnet;

[0065] S3. Roughly adjust the motor 200 so that the height and levelness of the motor 200 are basically the same as those of the coupling 130, and the output shaft of the motor 200 is basically coaxial with the first connecting shaft 11, and the magnet 161 is close to the needle body 163 but does not touch it;

[0066] S4. Fine-tune the motor 200. The needle body 163 changes its inclination state, and both the horizontal ray 151 and the vertical ray 152 coincide with the needle body 163. During this process, both laser instruments 150 are in the open state, and the process of fine-tuning the motor 200 involves adjusting the height direction and horizontal direction of the motor 200, as Figure 9 shown;

[0067] S5. After the adjustment is completed, remove the magnetic pointer assembly 162 and the magnet 161, assemble and fix the coupling 130 and the motor 200, and then the motor 200 can be started for testing.

[0068] In the above process, steps S1 and S2 can be interchanged.

[0069] The needle body 163 is made of magnetic metal, and the mass of the needle body 163 is as light as possible and the diameter is as small as possible to reduce the influence of gravity on the needle body 163 during the adjustment process. And the needle body 163 is in a movable state in the magnetic pointer assembly 162. When the needle body 163 is not magnetically attracted, the needle body 163 droops.

[0070] See Figure 9, the magnet 161 adopts a cylindrical structure with a uniformly distributed magnetic field on the circumference, and thus can form a magnetic adsorption that coincides with the axis and has the strongest and most stable magnetic force. When the axis of the magnet 161 coincides with the axis of the needle body 163, the needle body 163 can be completely horizontal, and thus coincides with both the horizontal ray 151 and the vertical ray 152. Therefore, in this state, the output shaft of the motor 200 and the axis of the coupling 130 are coaxial.

[0071] In addition, during the implementation of the test, the inventor found that the adjustment seat 140 is not convenient for adjusting the motor 200, and after the motor 200 is adjusted, it is difficult to maintain the adjustment state of the motor 200 during the assembly process of the coupling 130. In particular, it is difficult to keep the axis of the motor 200 and the axis of the coupling 130 coincident. The inventor designed the structure of the adjustment seat 140 for this reason.

[0072] Figure 10 The structure diagram of the adjustment seat 140 is shown. The adjustment seat 140 includes an upper movable block 141, a lower movable block 142, a sliding plate 171, and a rotating plate 143. The lower movable block 142 is arranged on the test bench 100, and a lead screw 145 controlled to rotate by a handle 144 is installed on the test bench 100. The lead screw 145 penetrates through the lower movable block 142, and a nut cooperating with the lead screw 145 is installed in the lower movable block 142. When the handle 144 is shaken, the lower movable block 142 will move axially along the lead screw 145.

[0073] The upper movable block 141 is arranged above the lower movable block 142, and the upper movable block 141 and the lower movable block 142 are matched by an inclined surface. When the lower movable block 142 moves horizontally, the upper movable block 141 will move up and down, thereby adjusting the height of the motor 200. Side baffles 146 for restricting the upper movable block 141 are arranged on the test bench 100, chutes 147 are arranged on the side baffles 146, and sliders 148 cooperating with the chutes 147 are arranged on the upper movable block 141.

[0074] The sliding plate 171 is arranged on the top of the upper movable block 141. Figure 11 The structure diagram of the upper movable block 141 is shown. A first chute 149 is arranged on the top of the upper movable block 141, a first slider is arranged at the bottom of the sliding plate 171, and the first slider is slidably matched with the first chute 149, so that the sliding plate 171 can move left and right on the top of the upper movable block 141 along the first chute 149.

[0075] The rotating plate 143 is movably installed on the top of the sliding plate 171. The rotating plate 143 can slide along the sliding plate 171 or rotate relative to the sliding plate 171. Figure 12The structural schematic diagram of the sliding plate 171 is shown. A second sliding groove 172 is provided at the top of the sliding plate 171. The rotating plate 143 is connected to the sliding plate 171 through a connecting member 180. Figure 13 The structural schematic diagram of the connecting member 180 is shown. The connecting member 180 includes a slider 181 and a bearing 182 fixed on the top of the slider 181. The slider 181 is slidably disposed in the second sliding groove 172. The slider 181 is fixed to the inner ring of the bearing 182, and the outer ring of the bearing 182 is fixed to the rotating plate 143. Thus, the relative rotation between the rotating plate 143 and the sliding plate 171 can be realized through the bearing 182. By sliding the slider 181 and the sliding plate 171, the motor 200 is fixed on the rotating plate 143; when the motor 200 is adjusted, the rotation between the rotating plate 143 and the sliding plate 171 can be locked, and the sliding between the sliding plate 171 and the upper movable block 141 can be locked. After pulling the motor 200 away by moving the rotating plate 143, a space for assembling the coupling 130 can be provided.

[0076] Since the upper movable block 141, the sliding plate 171, and the rotating plate 143 are in a stacked relationship, the existing structure of pressing and locking can be used to achieve the locking purpose.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. Method for position adjustment before motor test, characterized in that The motor is fixed on a motor test device, and the motor test device includes: A test bench, on which two laser instruments are provided. The two laser instruments emit a horizontal ray and a vertical ray respectively, and both the horizontal ray and the vertical ray pass through the axis of the coupling; A dynamometer, fixed on the test bench; A sensor, fixed on the test bench, and the sensor is connected to the dynamometer through a coupling; An adjusting seat, arranged on the test bench for fixing and adjusting the motor, and the sensor is connected to the motor through a coupling; The coupling includes: A first connecting part, having a connecting shaft for external connection; A second connecting part, having a connecting shaft for external connection; An elastic column, which is arranged between the first connecting part and the second connecting part, and both ends of the elastic column are embedded in the first connecting part and the second connecting part. When the first connecting part and the second connecting part rotate axially, they are softly connected through the elastic column; The first connecting part includes a first connecting disk and a first connecting shaft fixed at one end of the first connecting disk. On the other end face of the first connecting disk, a first cavity for accommodating the elastic column is provided. At least two first cavities are provided, and the centers of the first cavities are distributed on a circle with the axis of the first connecting shaft as the center; The second connecting part includes a second connecting disk and a second connecting shaft fixed at one end of the second connecting disk. On the other end face of the second connecting shaft, a second cavity for accommodating the elastic column is provided. At least two second cavities are provided, and the centers of the second cavities are distributed on a circle with the axis of the second connecting shaft as the center; The number and distribution state of the second cavities are the same as those of the first cavities; The position adjustment method is as follows: S1. Place the motor on the adjusting seat, and a coaxial cylindrical magnet is fixed on the output shaft of the motor; S2. Fix a magnetic pointer assembly on the first connecting disk of the coupling. The magnetic pointer assembly has a needle body coaxial with the first connecting shaft, and the needle body can be attracted by the magnet; S3. Initially adjust the motor so that the height and levelness of the motor are basically the same as those of the coupling, and the output shaft of the motor is basically coaxial with the first connecting shaft. The magnet is close to the needle body but does not touch it; S4. Fine-tune the motor to change the inclination state of the needle body and make both the horizontal ray and the vertical ray coincide with the needle body; S5. After the adjustment is completed, remove the magnetic pointer assembly and the magnet, assemble and fix the coupling with the motor, and start the motor for testing.

2. The position adjustment method before motor test according to claim 1, wherein The first connecting disk and the second connecting disk are disks.

3. The position adjustment method before motor test according to claim 1, characterized in that The first connecting disk and the second connecting disk are aluminum disks.

4. The position adjustment method before motor test according to claim 1, characterized in that, The elastic column is a nylon rod.

5. The method for position adjustment before motor test according to claim 1, characterized in that The adjusting seat includes: A lower movable block, slidably arranged on the test bench; An upper movable block, arranged above the lower movable block, and the lower movable block and the upper movable block are in cooperation through an inclined surface; A sliding plate, slidably arranged on the upper movable block in the left-right direction; A rotating plate, which is slidably arranged on the sliding plate in the front-back direction, and the rotating plate and the sliding plate can rotate relative to each other.

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