An asynchronous motor load testing device

Abstract

The utility model relates to motor load test technical field especially relates to an asynchronous motor load test device, including motor body, the keyway is set up on the pivot of motor body, the one end of pivot of motor body is provided with torque tester, the end fixedly connected with transmission shaft of torque tester, the outside of one end of transmission shaft close to motor body is equipped with the shaft sleeve, and the pivot of motor body is inserted in the inside of shaft sleeve, and is coupled with transmission shaft through the shaft sleeve, and the pivot of motor body adopts the plug-in cooperation through the shaft sleeve, spares traditional shaft coupling, and the lateral embedding mode of combining lock post and keyway allows the motor to be directly loaded into in any angular position, reduces the operation difficulty, improves the convenience of operation, and simultaneously the separable coupling of the tooth ring and the tooth cover is formed, when the shaft sleeve retreats under the external force, the both are separated, and the measured motor is convenient for quick replacement, and the spring pushes the base forward in normality, makes the lock post automatically enter the keyway, improves the connecting efficiency of both during testing.

Description

Technical Field

[0001] This utility model relates to the field of motor load testing technology, and in particular to an asynchronous motor load testing device. Background Technology

[0002] When an asynchronous motor leaves the factory, its output torque, speed, and power parameters must be tested. By using a load testing device, the operating state of the motor under different load conditions can be simulated to obtain its true output characteristics, which can be used for product quality control, factory inspection, or R&D optimization.

[0003] In existing technologies, asynchronous motor load testing devices typically use couplings to connect the output shaft of the motor under test to a torque tester for power transmission and data acquisition. However, due to the weight of asynchronous motors and the fact that the torque tester is fixed on the testing platform, connecting the motor output shaft to the tester using couplings is difficult. Furthermore, using couplings leads to cumbersome assembly and disassembly processes, requiring repeated tightening of multiple bolts each time the motor under test is changed, resulting in lengthy operations. This is particularly problematic during frequent on-site testing where rapid connection is difficult, reducing testing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an asynchronous motor load testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An asynchronous motor load testing device includes a motor body, a keyway on the rotating shaft of the motor body, a torque tester at one end of the rotating shaft of the motor body, a drive shaft fixedly connected to the end of the torque tester, a bushing sleeve on the outside of the drive shaft near the end of the motor body, the rotating shaft of the motor body being inserted into the bushing sleeve and connected to the drive shaft through the bushing sleeve.

[0007] Preferably, the bushing has a U-shaped groove, and a locking pin is fixedly installed on the inner side wall of the groove.

[0008] Preferably, the end of the bushing near the torque tester is fixedly connected to a base, and the end of the drive shaft is fixedly fitted with a gear sleeve, which is slidably disposed inside the base and the bushing.

[0009] Preferably, a toothed ring is fixedly installed on the inner side wall of the base, and the toothed ring and the side wall of the toothed sleeve are engaged by teeth.

[0010] Preferably, a support plate is provided between the torque tester and the base, and the middle section of the drive shaft is rotatably mounted on the support plate.

[0011] Preferably, a spring is fitted onto the drive shaft between the base and the support plate.

[0012] Compared with the prior art, the advantages of this utility model are as follows:

[0013] 1. The bushing and motor shaft are connected by a plug-in joint, eliminating the need for traditional couplings. Combined with the lateral insertion method of the locking pin and keyway, the motor can be directly installed at any angle, reducing the difficulty of operation and improving the convenience of operation. At the same time, the separable connection formed by the gear ring and gear sleeve allows the two to be connected by moving only the bushing without moving the motor body and the torque tester. This not only makes it easy to connect the motor under test to the torque tester, but also facilitates the quick replacement of the motor under test.

[0014] 2. By using a spring on the drive shaft between the base and the support plate, the base is pushed forward under normal conditions, causing the locking pin to automatically engage with the keyway, and at the same time driving the gear ring and gear sleeve to complete the meshing, thus improving the connection efficiency between the two during testing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0017] Figure 2 This is the second schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a partial structural diagram of the overall structure of this utility model;

[0019] Figure 4 This is a partial structural cross-sectional view of the overall structure of this utility model.

[0020] The attached figures are labeled as follows:

[0021] 1. Motor body; 2. Bushing; 3. Locking pin; 4. Base; 5. Spring; 6. Support plate; 7. Drive shaft; 8. Torque tester; 9. Gear sleeve; 11. Gear ring. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] An asynchronous motor load testing device, such as Figures 1-4As shown, the device includes a motor body 1. A keyway is provided on the rotating shaft of the motor body 1. A torque tester 8 is provided at one end of the rotating shaft of the motor body 1. The torque tester 8 is used to detect the actual output torque of the motor body 1 during operation. A transmission shaft 7 is fixedly connected to the end of the torque tester 8. The transmission shaft 7 is used to transmit torque from the motor body 1 to the torque tester 8. A bushing 2 is sleeved on the outside of the end of the transmission shaft 7 near the motor body 1. The rotating shaft of the motor body 1 is inserted into the inside of the bushing 2 and connected to the transmission shaft 7 through the bushing 2. When the rotating shaft of the motor body 1 rotates, the torque is transmitted to the torque tester 8 through the bushing 2 and the transmission shaft 7. When the rotating shaft of the motor body 1 is inserted into the inner cavity of the bushing 2, the torque is transmitted from the motor body 1 to the transmission shaft 7 through the bushing 2. The bushing 2 replaces the traditional coupling, eliminating the need for multiple bolt fastening steps and shortening the assembly time.

[0024] Meanwhile, since the bushing 2 rotates on the transmission shaft 7, it allows the motor shaft to be inserted at different angular positions and still complete the keyway alignment and engagement, avoiding the requirement of strict angular alignment and improving the fault tolerance of docking and the ease of operation.

[0025] The bushing 2 has a U-shaped slot, which makes it easy for the motor body 1 to be inserted or removed from the side, improving the convenience of assembly and disassembly. A locking pin 3 is fixedly installed on the inner wall of the slot. When the motor body 1 is inserted into the bushing 2 from the side of the U-shaped slot, the locking pin 3 is simultaneously embedded in the keyway on the shaft to form a circumferential stop connection, preventing relative rotation and ensuring reliable torque transmission, while retaining the characteristic of axial quick release.

[0026] The end of the bushing 2 near the torque tester 8 is fixedly connected to the base 4, and the end of the drive shaft 7 is fixedly fitted with a gear sleeve 9. The outer contour of the gear sleeve 9 is embedded in the continuous hole structure formed by the base 4 and the inner cavity of the bushing 2, and can slide along the axial direction. When the bushing 2 rotates with the motor shaft, its torque is transmitted to the gear sleeve 9 through the base 4, thereby driving the drive shaft 7 to rotate synchronously.

[0027] A toothed ring 11 is fixedly installed on the inner side wall of the base 4. The toothed ring 11 and the side wall of the toothed sleeve 9 are meshed by teeth to form circumferential linkage, which transmits torque from the bushing 2 to the base 4, and then from the toothed ring 11 inside the base 4 to the toothed sleeve 9 and the drive shaft 7. During assembly or disassembly, when the toothed sleeve 9 slides inward along the axial direction, the teeth gradually disengage, allowing the toothed sleeve 9 to rotate freely before it is fully in place, reducing the difficulty of insertion.

[0028] Once the connection is complete, the gear sleeve 9 and the gear ring 11 are fully engaged. The torque is transmitted from the bushing 2 to the gear ring 11 via the base 4, and then to the gear sleeve 9 through the tooth engagement, ultimately driving the transmission shaft 7 to rotate.

[0029] A support plate 6 is provided between the torque tester 8 and the base 4. The middle section of the drive shaft 7 is rotatably mounted on the support plate 6 through bearings, forming a support layout with more than two points. This enhances the rigidity of the shaft system, reduces the eccentric vibration caused by the long cantilever structure, and ensures that the drive shaft 7 maintains a good coaxial state during rotation, thereby improving the stability of the test process and the accuracy of the data.

[0030] A spring 5 is fitted on the drive shaft 7 between the base 4 and the support plate 6. Its two ends abut against the limiting structures on the base 4 and the support plate 6 respectively. It is in a pre-compressed state and provides continuous axial thrust. When no external force is applied, the elastic force of the spring 5 pushes the base 4 together with the bushing 2 connected to it to move along the drive shaft 7 toward the motor side to achieve automatic alignment.

[0031] When the shaft of the motor body 1 is inserted into the bushing 2, the base 4 moves forward, causing the gear ring 11 to approach the gear sleeve 9. Under the action of the spring 5, the teeth automatically mesh, forming a power connection.

[0032] The bushing 2 moves forward with the base 4, so that the locking pin 3 in its U-shaped slot is simultaneously inserted into the keyway of the motor body 1 shaft, achieving circumferential positioning and completing rapid locking.

[0033] The working principle of the asynchronous motor load testing device provided by this utility model is as follows:

[0034] Before testing, the motor body 1 needs to be connected to the testing device. Manually pull the bushing 2 axially towards the torque tester 8, which will cause the base 4 to move backward along the transmission shaft 7 against the elastic force of the spring 5. At this time, the gear ring 11 will disengage from the gear sleeve 9, and the locking pin 3 will move away from the keyway of the motor shaft.

[0035] Insert the output shaft of the motor body 1 into the bushing 2 from the side of the U-shaped slot. The locking pin 3 can slide in automatically during the keyway entry process, which makes it easy to install. This allows the test device to connect the two without moving the motor body 1 and the torque tester 8, only by moving the bushing 2, which makes it easy to quickly connect the motor body 1 under test and the torque tester 8.

[0036] After the external force is released, the spring 5 releases its stored energy, pushing the base 4 and the bushing 2 to return to their original position. During this process, the locking pin 3 is fully embedded in the keyway of the motor shaft, completing the circumferential fixation. At the same time, the toothed ring 11 and the toothed sleeve 9 achieve automatic tooth meshing, forming a stable power connection.

[0037] After the motor starts, its rotating shaft rotates and drives the bushing 2 to rotate through the keyway and locking pin 3. The bushing 2 transmits the torque to the gear ring 11 through the base 4, and then from the gear ring 11 to the gear sleeve 9 that meshes with it, finally driving the transmission shaft 7 to rotate and transmitting the power to the torque tester 8 to complete the torque signal acquisition. Its specific model is HBM T40BH.

[0038] Because the gear sleeve 9 and the gear ring 11 are connected by multi-tooth meshing, the bushing 2 can be rotated flexibly so that the locking pin 3 on it can be aligned with the keyway at any angle, which improves the ease of operation.

[0039] After the test is completed, pull the bushing 2 back again to disengage the gear ring 11 from the gear sleeve 9 and remove the locking pin 3 from the keyway, so that the motor body 1 can be quickly disassembled and the replacement can be achieved efficiently.

[0040] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An asynchronous motor load testing device, characterized in that, The device includes a motor body (1), on which a keyway is provided. A torque tester (8) is provided at one end of the motor body (1), and a transmission shaft (7) is fixedly connected to the end of the torque tester (8). A bushing (2) is fitted on the outside of the end of the transmission shaft (7) near the motor body (1). The motor body (1) is inserted into the bushing (2) and connected to the transmission shaft (7) through the bushing (2).

2. The asynchronous motor load testing device according to claim 1, characterized in that, The bushing (2) has a U-shaped groove, and a locking pin (3) is fixedly installed on the inner side wall of the groove.

3. The asynchronous motor load testing device according to claim 1, characterized in that, The bushing (2) is fixedly connected to a base (4) at one end near the torque tester (8), and a gear sleeve (9) is fixedly fitted at the end of the transmission shaft (7). The gear sleeve (9) is slidably disposed inside the base (4) and the bushing (2).

4. The asynchronous motor load testing device according to claim 3, characterized in that, A toothed ring (11) is fixedly installed on the inner side wall of the base (4), and the toothed ring (11) and the side wall of the toothed sleeve (9) are engaged by teeth.

5. The asynchronous motor load testing device according to claim 3, characterized in that, A support plate (6) is provided between the torque tester (8) and the base (4), and the middle section of the transmission shaft (7) is rotatably mounted on the support plate (6).

6. The asynchronous motor load testing device according to claim 3, characterized in that, A spring (5) is fitted on the drive shaft (7) between the base (4) and the support plate (6).

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