Locked-rotor experiment tool

Abstract

The invention relates to the field of motor plugging experiments, in particular to a locked-rotor experiment tool. The locked-rotor experiment tool comprises a bottom frame, an object placing platform for placing a motor and an adjustable installation unit for installing a coupler, wherein the object placing platform is installed on the upper end portion of the bottom frame. A groove connected with an output shaft of the motor is formed in one end of the coupler, and a plurality of ratchets distributed annularly are integrally connected to the circumferential inner wall of the groove; the adjustable installation unit is composed of a vertical adjusting mechanism installed on the bottom frame, a transverse adjusting mechanism installed on the vertical adjusting mechanism and a transverse feeding mechanism installed on the transverse adjusting mechanism, and the coupler is detachably connected to the transverse feeding mechanism. In the locked-rotor experiment tool provided by the invention, the coupler is manufactured into a coupler with a ratchet structure inside, so that a test power supply mode is a locked state, the position of a rotor is found by using low voltage before test and the direction of the ratchet wheel is adopted, the test position of the rotor test can be conveniently found, and the experiment efficiency is higher.

Description

Technical Field

[0001] The invention relates to the field of motor blocking experiments, and in particular to a blocking rotor experiment tool. Background Art

[0002] The blocking test (also called the stall test) of a three-phase permanent magnet motor is an important test method used to evaluate the performance of the motor under specific conditions. Before the motor starts, the position of the rotor is unknown. In order to carry out effective control, especially vector control, the position of the rotor must be determined first to accurately control the current in the stator winding, optimize the performance of the motor, and improve the control accuracy of the motor.

[0003] According to the traditional experimental method, the motor shaft of the motor is generally restricted by a fixed coupling, but this fixing method has the problem of low efficiency, which will have a certain impact on the progress of the entire experiment.

[0004] Therefore, it is necessary to provide a new stall test tool to solve the above technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a stall test tool.

[0006] The stall test tool provided by the present invention comprises a base frame, a storage platform for placing the motor is installed on the upper end of the base frame, and an adjustable installation unit for installing the coupling; One end of the coupling has a groove connected to the output shaft of the motor, and a plurality of annularly distributed ratchets are integrally connected to the circumferential inner wall of the groove; The adjustable mounting unit is composed of a vertical adjustment mechanism installed on the base frame, a lateral adjustment mechanism installed on the vertical adjustment mechanism, and a lateral feed mechanism installed on the lateral adjustment mechanism. The coupling is detachably connected to the lateral feed mechanism, and is driven by the adjustable mounting unit to move along the X, Y, and Z directions. The storage platform is located in the Y direction of the coupling.

[0007] Preferably, a first stop frame for positioning the motor is fixed to the upper end of the storage platform near the adjustable mounting unit.

[0008] Preferably, the vertical adjustment mechanism comprises a horizontal plate frame fixed on the base frame, a vertically arranged linear guide rail is fixed on one side of the vertical plate frame, a slide seat is installed through the linear guide rail, and a mounting frame is fixed on the slide seat.

[0009] Preferably, an oblique reinforcement frame for supporting the vertical plate frame is fixed between the horizontal plate frame and the vertical plate frame.

[0010] Preferably, the lateral adjustment mechanism includes a first fixed seat fixed on the mounting frame, the length direction of the first fixed seat is along the width direction of the base frame, a U-shaped second fixed seat is fixed to the upper end of the first fixed seat, a first positioning slot is opened on the upper end of the second fixed seat along the length direction and extends to the depth of the first fixed seat, a screw rod rotates inside the first positioning slot, one end of the screw rod is passed through and extends to the outside of the first fixed seat, and a turntable is fixed thereon, a transmission seat extending to the first positioning slot is also slidably provided on the upper end of the second fixed seat, the screw rod passes through the transmission seat and is threadedly connected thereto, and a mounting plate is fixed to the upper end of the transmission seat.

[0011] Preferably, the lateral feed mechanism includes a base plate fixed on the mounting plate, the length direction of the base plate is along the length direction of the base frame, a hydraulic cylinder is fixed at a position close to one side of the upper end of the base plate, and two symmetrically arranged positioning blocks are integrally connected at a position close to the other side of the upper end of the base plate, a second positioning groove is formed between the two positioning blocks, and a positioning slider is slidably connected, one side of the positioning slider is fixed to the output end of the hydraulic cylinder, and the other side is fixed with a connecting rod, and the other end of the connecting rod is integrally connected with a hexagonal insert.

[0012] Preferably, one side opposite to the two positioning blocks is provided with an engaging groove, and both sides of the positioning slider are integrally connected with an engaging slider, and the engaging slider is embedded in and slides inside the engaging groove.

[0013] Preferably, the other end of the coupling has a hexagonal groove, the hexagonal groove is matched with the hexagonal block, and is installed on the connecting rod.

[0014] Preferably, a fixing ring is fixed on the connecting rod, and a connecting arm is fixed on the outer side wall of the fixing ring. The length direction of the connecting arm is along the axial direction of the connecting rod, and the other end exceeds the position of the coupling. A second stop frame that can support the output shaft of the motor and is used to position the coupling is also fixed on this end.

[0015] Compared with the related art, the stall test tooling provided by the present invention has the following beneficial effects: 1. Make the coupling with a ratchet structure inside, so that the test power supply mode is locked. Use low voltage to find the rotor position before the test. Use the ratchet direction to easily find the rotor test position, and the test efficiency is higher; 2. The adjustable mounting unit can realize the installation and fixation of the coupling, and at the same time can drive the coupling to move in space to adjust the position of the coupling, so that targeted adjustments can be made according to motors of different sizes and types, thereby improving the efficiency of the experiment and having a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of a stall test tool provided by the present invention; Figure 2 The structural diagram of the adjustable installation structure shown in the present invention is Figure 1 ; Figure 3 The structural diagram of the adjustable installation structure shown in the present invention is Figure 2 ; Figure 4 It is a structural schematic diagram of the vertical adjustment mechanism shown in the present invention; Figure 5 It is a structural schematic diagram of the lateral adjustment mechanism shown in the present invention; Figure 6 The schematic diagram of the structure of the transverse feeding mechanism of the present invention is shown in FIG. Figure 1 ; Figure 7 The schematic diagram of the structure of the transverse feeding mechanism of the present invention is shown in FIG. Figure 2 ; Figure 8 It is a schematic structural diagram of a cross-section of the coupling shown in the present invention; Fig. 9 It is a structural schematic diagram of the second baffle frame shown in the present invention.

[0017] Numbers in the figure: 1, bottom frame; 2, storage platform; 3, first gear frame; 4. Adjustable mounting unit; 41. vertical adjustment mechanism; 411. horizontal plate frame; 412. vertical plate frame; 413. reinforcement frame; 414. linear guide rail; 415. slide seat; 416. mounting frame; 42. lateral adjustment mechanism; 421. first fixed seat; 422. second fixed seat; 423. first positioning slide; 424. screw rod; 425. turntable; 426. transmission seat; 427. mounting plate; 43. lateral feeding mechanism; 431. bottom plate; 432. hydraulic cylinder; 433. second positioning slide groove; 434. engaging slide groove; 435. positioning slide block; 436. engaging slide block; 437. connecting rod; 438. hexagonal insert; 5. Coupling; 51. Hexagonal groove; 52. Ratchet; 6. Fixed ring; 7. Connecting arm; 8. Second stop frame. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0020] See also Figures 1 to 8 , a stall test fixture provided by an embodiment of the present invention comprises a base frame 1, a storage platform 2 for placing a motor is installed on the upper end of the base frame 1, and an adjustable mounting unit 4 is located on one side of the storage platform 2, a first stop frame 3 is also fixed on the storage platform 2, a coupling 5 is detachably connected to the adjustable mounting unit 4, one end of the coupling 5 has a groove connected to the output end of the motor, and a plurality of annularly distributed ratchet teeth 52 are integrally connected to the circumferential inner wall of the groove; The adjustable mounting unit 4 is composed of a vertical adjustment mechanism 41 mounted on the base frame 1, a lateral adjustment mechanism 42 mounted on the vertical adjustment mechanism 41, and a lateral feed mechanism 43 mounted on the lateral adjustment mechanism 42. The coupling 5 is detachably connected to the lateral feed mechanism 43, and the adjustable mounting unit 4 is used to drive it to move along the X, Y, and Z directions. The storage platform 2 is located in the Y direction of the coupling 5.

[0021] It should be noted that: in this test fixture, the placement platform 2 is used to place the motor, so that it can better cooperate with the adjustable mounting unit 4 to adjust the coupling 5, so that the coupling 5 and the output shaft of the motor can be better docked, which is more conducive to the experiment. At the same time, a first stop frame 3 is set on the placement platform 2. When the motor is placed, the front end of the motor base is pressed against the first stop frame 3, so that the motor can be positioned and the motor can be straightened; The placement platform 2 is not limited to this type. If the motor to be tested is relatively large and difficult to move and adjust on the placement platform 2, a ball bearing can be provided on the placement platform 2 to assist the movement of the motor, facilitate the adjustment of the position of the motor, and fix the motor after the position adjustment is completed, thereby improving the stability of the motor during the experiment. The coupling 5 is made into a coupling 5 with a ratchet 52 structure inside, so that the test power supply mode is in a locked state. The rotor position is found by low voltage before the test, and the ratchet direction is used to easily find the rotor test position, which makes the test efficiency higher; The adjustable mounting unit is a structure for mounting the coupling 5, which includes a vertical adjustment mechanism 41, a lateral adjustment mechanism 42 and a lateral feed mechanism 43. The vertical adjustment mechanism 41 can be used to drive the coupling 5 to move in the vertical direction, so that targeted adjustments can be made according to the height of the motor shaft; the lateral adjustment mechanism 42 can drive the coupling 5 to move in the width direction of the base frame 1, so that when the position of the motor deviates from the centerline position of the base frame 1 and the motor itself is not convenient to move and adjust, the lateral adjustment mechanism 42 can be used to adjust the position of the coupling 5 accordingly; therefore, the vertical adjustment mechanism 41 and the lateral adjustment mechanism 42 cooperate with each other to realize the movement of the coupling 5 in the vertical plane; the lateral feed mechanism 43 is used to drive the coupling 5 to move toward a position close to or away from the motor, that is, after the precise positioning of the coupling 5 and the motor output shaft is completed, the coupling 5 is driven to move by the lateral feed mechanism 43 so that it can be docked and limited with the output shaft of the motor.

[0022] In the embodiments of the present invention, please refer to Figure 4 The vertical adjustment mechanism 41 includes a horizontal plate frame 411 fixed on the base frame 1, and a slanted reinforcement frame 413 is fixed between the horizontal plate frame 411 and the vertical plate frame 412 for supporting the vertical plate frame 412. A vertically arranged linear guide rail 414 is fixed to one side of the vertical plate frame 412, and a slide 415 is installed through the linear guide rail 414, and a mounting frame 416 is fixed on the slide 415.

[0023] It should be noted that: in the vertical adjustment mechanism 41, the installation structure based on the horizontal plate frame 411 and the vertical plate frame 412 further supports the vertical plate frame 412 through the reinforcement frame 413 to improve its stability. The slide 415 is raised and lowered along the linear guide rail 414 to achieve the height adjustment of the coupling 5. At the same time, the installation of the horizontal adjustment mechanism 42 is achieved by using the mounting frame 416. The vertical adjustment range of the coupling 5 is relatively large, so setting an automatically movable slide rail structure is more conducive to the adjustment.

[0024] In the embodiments of the present invention, please refer to Figure 5The lateral adjustment mechanism 42 includes a first fixed seat 421 fixed on the mounting frame 416, the length direction of the first fixed seat 421 is along the width direction of the base frame 1, and a U-shaped second fixed seat 422 is fixed at the upper end of the first fixed seat 421, and a first positioning slot 423 extending along the length direction and in depth to the inside of the first fixed seat 421 is opened at the upper end of the second fixed seat 422, and a screw rod 424 rotates inside the first positioning slot 423, one end of the screw rod 424 is penetrated and extends to the outside of the first fixed seat 421, and a turntable 425 is fixed thereto, and a transmission seat 426 extending to the inside of the first positioning slot 423 is also slidably provided at the upper end of the second fixed seat 422, and the screw rod 424 penetrates the transmission seat 426 and is threadedly connected thereto, and a mounting plate 427 is fixed to the upper end of the transmission seat 426.

[0025] It should be noted that: in the lateral adjustment mechanism 42, the first fixed seat 421 and the second fixed seat 422 are used as the basic installation structure, and a movable transmission seat 426 is installed on the second fixed seat 422. The movement direction of the transmission seat 426 is along the width direction of the base frame 1 to achieve the position adjustment of the coupling 5 in the horizontal direction. At the same time, the screw rod 424 is used as the driving adjustment structure, and the rotating disk 425 is used to drive the screw rod 424 to rotate, and the screw rod 424 drives the transmission seat 426 to move; The second fixing seat 422 itself is U-shaped, and has a groove at its upper end. The transmission seat 426 slides inside the groove and can be subject to a certain restriction, thereby further improving the stability of the structure at this location; The adjustment of the coupling 5 in the horizontal direction belongs to a small range adjustment, so manual adjustment is preferred to improve the operating accuracy.

[0026] In the embodiments of the present invention, please refer to Figure 6 and Figure 7 The lateral feeding mechanism 43 includes a bottom plate 431 fixed on the mounting plate 427, the length direction of the bottom plate 431 is along the length direction of the bottom frame 1, a hydraulic cylinder 432 is fixed at a position near one side of the upper end of the bottom plate 431, and two symmetrically arranged positioning blocks are integrally connected at a position near the other side of the upper end of the bottom plate 431, a second positioning slot 433 is formed between the two positioning blocks, and a positioning slider 435 is slidably connected, and an engaging slot 434 is provided on the opposite sides of the two positioning blocks, and an engaging slider 436 is integrally connected on both sides of the positioning slider 435, and the engaging slider 436 is embedded in and slides in the engaging slot 434, one side of the positioning slider 435 is fixed to the output end of the hydraulic cylinder 432, and the other side is fixed with a connecting rod 437, and the other end of the connecting rod 437 is integrally connected with a hexagonal insert 438; The other end of the coupling 5 has a hexagonal groove 51 , which is matched with the hexagonal block 438 and is installed on the connecting rod 437 .

[0027] It should be noted that: in the transverse feeding mechanism 43, the hydraulic cylinder 432 is used as a driving structure, and the hydraulic cylinder 432 can directly drive the positioning slider 435 to move, and then drive the coupling 5 to move through the connecting rod 437, so that the coupling 5 is docked and fixed with the motor output shaft; The positioning slider 435 slides inside the second positioning slot 433 and is limited by the positioning block. At the same time, the engaging slider 436 thereon slides inside the engaging slot 434 of the positioning block to further limit the positioning slider 435. Therefore, during the experiment, the torque borne by the connecting rod 437 is transmitted to the positioning slider 435, and the positioning slider 435 itself is strongly limited. Therefore, the positioning slider 435 bears the torque, so the force will not be transmitted to the hydraulic cylinder 432, which can avoid the deformation of the hydraulic cylinder 432 due to the force, and has a protective effect. Regarding the installation of the coupling 5, it is fixed to the connecting rod 437 by plugging, so it is more convenient to disassemble it. After the coupling 5 is deformed due to repeated use, it is convenient to replace it. At the same time, the plug-in structure is hexagonal, which has a limiting effect on the coupling 5, so it can also ensure the stability of the coupling 5 itself to meet the use requirements.

[0028] In the embodiments of the present invention, please refer to Fig. 9 A fixing ring 6 is also fixed on the connecting rod 437, and a connecting arm 7 is fixed to the outer wall of the fixing ring 6. The length direction of the connecting arm 7 is along the axial direction of the connecting rod 437, and the other end exceeds the position of the coupling 5. A second stop frame 8 is also fixed at this end, which can support the output shaft of the motor and is used to position the coupling 5.

[0029] It should be noted that the fixing ring 6, the connecting arm 7 and the second stop frame 8 together constitute a structure for positioning the coupling 5. The fixing ring 6 is installed on the connecting rod 437. Therefore, when the position of the coupling 5 is adjusted, the positioning structure will also move together. When the coupling 5 is adjusted in the horizontal direction, the second stop frame 8 will resist the output shaft of the motor. In this state, the coupling 5 and the motor output shaft can be positioned to assist the docking between the two.

[0030] The process of using the device is as follows: (1) Placement and adjustment of the motor; The motor to be tested is placed on the storage platform 2, and then the front end of the motor base is pressed against the first stop frame 3 to achieve the positioning of the motor. At the same time, the first stop frame 3 itself is arranged parallel to the width direction of the storage platform 2. When the motor base is pressed against the first stop frame 3, the motor can also be straightened to avoid the motor from being skewed. (2) Vertical adjustment of the coupling; The slide 415 can move directly along the linear guide rail 414, thereby driving the mounting frame 416 to move. The mounting frame 416 serves as a basis for installing the lateral adjustment mechanism 42, thereby driving the coupling 5 to move and adjust in the vertical direction. (3) Lateral adjustment of the coupling; The screw rod 424 is driven to rotate by the turntable 425, thereby driving the transmission seat 426 and the mounting plate 427 to move together. The mounting plate 427 is the basis for installing the horizontal feed mechanism 43, and can drive the coupling 5 to move and adjust in the horizontal direction until the second stop frame 8 abuts against the output shaft of the motor. In this state, according to the contact state between the second stop frame 8 and the output shaft of the motor, the coupling 5 is fine-tuned in the vertical and horizontal directions again to achieve precise correspondence; (4) Docking between the coupling and the motor output shaft; After the position of the coupling 5 is adjusted, the hydraulic cylinder 432 is used to drive the positioning slider 435 to move, and then the coupling 5 is driven to move through the connecting rod 437, so that the coupling 5 and the motor output shaft are docked and fixed. At this time, the motor output shaft is limited, and then the rotor positioning operation can be carried out.

[0031] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A stall test tool, comprising a base frame (1), a storage platform (2) for placing a motor mounted on the upper end of the base frame (1), and an adjustable mounting unit (4) for mounting a coupling (5), characterized in that: One end of the coupling (5) has a groove for connecting to the output shaft of the motor, and a plurality of annularly distributed ratchet teeth (52) are integrally connected to the circumferential inner wall of the groove; The adjustable mounting unit (4) is composed of a vertical adjustment mechanism (41) mounted on the base frame (1), a lateral adjustment mechanism (42) mounted on the vertical adjustment mechanism (41), and a lateral feed mechanism (43) mounted on the lateral adjustment mechanism (42); the coupling (5) is detachably connected to the lateral feed mechanism (43) and is driven by the adjustable mounting unit (4) to move in the X, Y, and Z directions; the storage platform (2) is located in the Y direction of the coupling (5).

2. The stall test tooling according to claim 1, characterized in that: A first stop frame (3) for positioning the motor is also fixed at a position close to the adjustable mounting unit (4) at the upper end of the storage platform (2).

3. The stall test tooling according to claim 1, characterized in that: The vertical adjustment mechanism (41) comprises a horizontal plate frame (411) fixed on the base frame (1), a vertically arranged linear guide rail (414) being fixed on one side of the vertical plate frame (412), a slide seat (415) being mounted via the linear guide rail (414), and a mounting frame (416) being fixed on the slide seat (415).

4. The stall test tooling according to claim 3, characterized in that: A reinforcement frame (413) is also fixed between the horizontal plate frame (411) and the vertical plate frame (412) and is arranged obliquely to support the vertical plate frame (412).

5. The stall test tooling according to claim 1, characterized in that: The lateral adjustment mechanism (42) comprises a first fixed seat (421) fixed on the mounting frame (416), the length direction of the first fixed seat (421) is along the width direction of the base frame (1), a U-shaped second fixed seat (422) is fixed on the upper end of the first fixed seat (421), a first positioning slot (423) is provided on the upper end of the second fixed seat (422) and extends along the length direction and to a depth into the interior of the first fixed seat (421), a screw rod (424) is rotated inside the first positioning slot (423), one end of the screw rod (424) is passed through and extends to the outside of the first fixed seat (421), and a rotating disk (425) is fixed thereto, a transmission seat (426) is also slidably provided on the upper end of the second fixed seat (422) and extends into the interior of the first positioning slot (423), the screw rod (424) passes through the transmission seat (426) and is threadedly connected thereto, and a mounting plate (427) is fixed to the upper end of the transmission seat (426).

6. The stall test tooling according to claim 1, characterized in that: The transverse feeding mechanism (43) comprises a bottom plate (431) fixed on the mounting plate (427), the length direction of the bottom plate (431) is along the length direction of the bottom frame (1), a hydraulic cylinder (432) is fixed at a position close to one side of the upper end of the bottom plate (431), and two symmetrically arranged positioning blocks are integrally connected at a position close to the other side of the upper end of the bottom plate (431), a second positioning slot (433) is formed between the two positioning blocks, and a positioning slider (435) is slidably connected thereto, one side of the positioning slider (435) is fixed to the output end of the hydraulic cylinder (432), and the other side is fixed to a connecting rod (437), and the other end of the connecting rod (437) is integrally connected to a hexagonal insert (438).

7. The stall test tooling according to claim 6, characterized in that: An engaging slide groove (434) is provided on opposite sides of the two positioning blocks, and engaging slides (436) are integrally connected to both sides of the positioning slide block (435), and the engaging slide blocks (436) are embedded in and slide inside the engaging slide groove (434).

8. The stall test tooling according to claim 1, characterized in that: The other end of the coupling (5) has a hexagonal embedding groove (51), and the hexagonal embedding groove (51) is adapted to the hexagonal embedding block (438) and is mounted on the connecting rod (437).

9. The stall test tooling according to claim 6, characterized in that: A fixing ring (6) is also fixed on the connecting rod (437), and a connecting arm (7) is fixed on the outer wall of the fixing ring (6). The length direction of the connecting arm (7) is along the axial direction of the connecting rod (437), and the other end exceeds the position of the coupling (5). A second stop frame (8) that can resist the output shaft of the motor and is used to position the coupling (5) is also fixed on the end.

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