An improved measuring tool for the air gap between the stator and rotor of a motor

Abstract

The invention discloses an improved motor stator and rotor air gap measuring tool, which belongs to the field of motor measuring tools and comprises a handheld measuring rod, wherein a lighting mechanism is fixedly installed on the top of the handheld measuring rod by screws, a conical ruler measuring mechanism is fixedly connected to the end of the handheld measuring rod, a ruler body is installed at the tail of the handheld measuring rod, scale lines are provided on the side wall of the ruler body, a vernier ruler is slidably connected to the side wall of the ruler body, the conical ruler measuring mechanism is transmission-connected to an inner measuring claw of the vernier ruler through a linkage mechanism, the linkage mechanism comprises a connecting rod, a rotating wheel and a movable groove, an movable groove is provided inside the conical ruler measuring mechanism, a rotating wheel is slidably connected inside the movable groove, the rotating wheel is rotationally connected to one end of the connecting rod through a pin rod, and the other end of the connecting rod is installed with the inner measuring claw of the vernier ruler through the pin rod, which can greatly reduce the measurement error and is more convenient for data measurement.

Description

Technical Field

[0001] The invention relates to the technical field of motor measuring tools, in particular to an improved motor stator and rotor air gap measuring tool. Background Art

[0002] The air gap between the stator and rotor of a high-voltage motor is an important indicator for measuring the performance of the motor. The accuracy of data measurement directly affects the quality and progress of maintenance. At present, the main method for measuring the gap between the stator and rotor of a motor is to use a feeler gauge or a homemade measuring rod. The measuring tool currently used by the company is a homemade measuring rod, which is cut and polished with a bakelite stick and is measured with a flashlight and a vernier caliper. This method has large errors and is inconvenient to measure. Due to the structure of the motor, the feeler gauge does not have the conditions for measurement.

[0003] Since most motor air gap measurements can only be made from the air gap measurement hole of the motor end cover after the motor end cover is reinstalled, the hand cannot be inserted into the motor, and the measurement hole is small, it is inconvenient to use a feeler gauge or it cannot be used for measurement; homemade measuring rods can adapt to the motor structure for measurement, but homemade measuring rods are very arbitrary, there is no strict scale as a reference, the error is large, and the measurement data affects the result analysis. The processing and manufacturing process of the homemade measuring rod measuring head and the measurement method are greatly affected by human factors, and the measurement is also greatly affected by environmental factors.

[0004] The feeler gauge has a small measurement error, but due to the structural characteristics of the equipment, it is difficult to use it to measure the motor air gap; the homemade measuring rod has a large error, and it requires a variety of tools such as a flashlight and vernier caliper during measurement, and it is greatly affected by human factors. Summary of the invention

[0005] The purpose of the present invention is to provide an improved motor stator and rotor air gap measurement tool, which can greatly reduce the measurement error and is more convenient for data measurement, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an improved motor stator and rotor air gap measuring tool, comprising a handheld measuring rod, a lighting mechanism is fixedly installed on the top of the handheld measuring rod by screws, a conical ruler measuring mechanism is fixedly connected to the end of the handheld measuring rod, a ruler body is installed at the tail of the handheld measuring rod, scale lines are opened on the side wall of the ruler body, a vernier ruler is slidably connected to the side wall of the ruler body, and the conical ruler measuring mechanism is transmission-connected to the inner measuring claw of the vernier ruler through a linkage mechanism;

[0007] The linkage mechanism includes a connecting rod, a rotating wheel and a movable groove. An internal part of the taper gauge measuring mechanism is provided with the movable groove. The rotating wheel is slidably connected to the inside of the movable groove. One end of the rotating wheel is rotatably connected to one end of the connecting rod through a pin rod. The other end of the connecting rod is installed on the inner measuring claw of the vernier caliper through a pin rod.

[0008] Preferably, the lighting mechanism includes a mounting bracket, an LED small lamp, a threaded groove, a bolt, a switch and a cavity. The mounting bracket is installed on the top of the handheld measuring rod through screws. The LED small lamp is installed inside the mounting bracket. A cavity is provided inside the mounting bracket. The connecting rod passes through one end of the cavity and exits from the other end.

[0009] Preferably, a switch is installed at the tail of the LED small lamp. An LED small lamp battery box is arranged inside the handheld measuring rod. A button battery is installed inside the LED small lamp battery box. A switch is installed at the tail of the LED small lamp. The button battery is electrically connected to the LED small lamp through the switch.

[0010] Preferably, a threaded groove is provided on the top surface of the mounting bracket. A bolt is threadedly connected to the inside of the threaded groove. The bottom end of the bolt abuts against the side wall of the LED small lamp.

[0011] Preferably, the taper gauge measuring mechanism includes a taper gauge vernier, a taper gauge measuring head, a slider and a taper gauge vernier sliding groove. The end of the handheld measuring rod is fixedly connected to the taper gauge measuring head. The taper gauge vernier is slidably connected to the inclined surface of the taper gauge measuring head. A movable groove is provided on the side wall of the taper gauge vernier.

[0012] Preferably, the bottom side wall of the taper gauge vernier is fixedly connected to the slider. A taper gauge vernier sliding groove is provided below the inclined surface of the taper gauge measuring head. The slider is slidably connected to the inside of the taper gauge vernier sliding groove.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] The present invention provides an improved measuring tool for the air gap between the stator and rotor of a motor. 1. The measuring head uses a taper gauge, and there are a vernier and scales on the taper gauge. Compared with a self-made measuring rod, the reading is clearer and more accurate, with less error.

[0015] 2. A digital display vernier caliper is installed at the end of the handheld measuring rod, which has a linkage function with the vernier of the measuring head taper gauge. During measurement, the reading can be taken from the taper gauge after measurement or from the digital display vernier caliper during measurement, which is more intuitive and convenient.

[0016] 3. An LED small lamp head powered by a button battery is installed on the handheld measuring rod. When the switch is turned on during measurement, the air gap condition inside the device to be measured can be clearly seen, which is convenient for accurate measurement.

[0017] 4. The improved measuring tool is more convenient for the staff to operate, and the measured data is more accurate, reducing the measurement error. It is easy to carry and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the lighting mechanism of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the linkage mechanism and the conical ruler measuring mechanism of the present invention.

[0021] Reference numerals in the figures: 1. Handheld measuring rod; 2. Lighting mechanism; 21. Mounting bracket; 22. LED small lamp; 23. Threaded groove; 24. Bolt; 25. Switch; 26. Cavity; 3. LED small lamp battery box; 4. Linkage mechanism; 41. Link; 42. Rotating wheel; 43. Movable groove; 5. Conical ruler measuring mechanism; 51. Conical ruler vernier; 52. Conical ruler measuring head; 53. Slide block; 54. Conical ruler vernier sliding groove; 6. Ruler body; 7. Scale line; 8. Vernier scale; 9. Inner measuring jaw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] The present invention provides an improved motor stator and rotor air gap measuring tool as Figures 1 to 3 shown, which includes a handheld measuring rod 1. The top of the handheld measuring rod 1 is fixedly installed with a lighting mechanism 2 through screws. The lighting mechanism 2 includes a mounting bracket 21, an LED small lamp 22, a threaded groove 23, a bolt 24, a switch 25 and a cavity 26. The mounting bracket 21 is installed on the top of the handheld measuring rod 1 through screws. An LED small lamp 22 is installed inside the mounting bracket 21. A cavity 26 is opened inside the mounting bracket 21. The link 41 passes through one end of the cavity 26 and exits from the other end. By opening the cavity 26 inside the mounting bracket 21, the link 41 can pass through the mounting bracket 21, so that the link 41 can be easily moved.

[0024] A switch 25 is installed at the tail of the LED small lamp 22, and an LED small lamp battery box 3 is arranged inside the handheld measuring rod 1. A button battery is installed inside the LED small lamp battery box 3. A switch 25 is installed at the tail of the LED small lamp 22. The button battery is electrically connected to the LED small lamp 22 through the switch 25. The LED small lamp 22 can be powered by the button battery, and the LED small lamp 22 can be controlled to be powered by the switch 25. A threaded groove 23 is provided on the top surface of the mounting frame 21. The internal thread of the threaded groove 23 is connected with a bolt 24. The bottom end of the bolt 24 conflicts with the side wall of the LED small lamp 22. The LED small lamp 22 is limited by the bolt 24, so that the LED small lamp 22 can be fixed on the mounting frame 21.

[0025] The end of the handheld measuring rod 1 is fixedly connected with a tapered ruler measuring mechanism 5, the tail of the handheld measuring rod 1 is installed with a ruler body 6, the side wall of the ruler body 6 is provided with a scale line 7, the side wall of the ruler body 6 is slidably connected with a vernier ruler 8, and the tapered ruler measuring mechanism 5 is transmission-connected with an inner measuring claw 9 of the vernier ruler 8 through a linkage mechanism 4;

[0026] The linkage mechanism 4 includes a connecting rod 41, a rotating wheel 42 and a movable groove 43. The movable groove 43 is opened inside the conical ruler measuring mechanism 5. The rotating wheel 42 is slidably connected inside the movable groove 43. The rotating wheel 42 is rotatably connected to one end of the connecting rod 41 through a pin, and the other end of the connecting rod 41 is installed with the inner measuring claw 9 of the vernier ruler 8 through a pin.

[0027] The conical ruler measuring mechanism 5 includes a conical ruler vernier 51, a conical ruler measuring head 52, a slider 53, and a conical ruler vernier sliding groove 54. The end of the handheld measuring rod 1 is fixedly connected to the conical ruler measuring head 52, and the conical ruler vernier 51 is slidably connected to the inclined surface of the conical ruler measuring head 52. The side wall of the conical ruler vernier 51 is provided with a movable groove 43. By providing the movable groove 43 on the side wall of the conical ruler vernier 51, the conical ruler vernier 51 can make the internal pulley of the movable groove 43 slide during the sliding process, and can also push the connecting rod 41 to move from the end of the handheld measuring rod 1 to the tail, so that the vernier ruler 8 can slide on the ruler body 6, so as to obtain a reading.

[0028] A slider 53 is fixedly connected to the bottom side wall of the conical scale vernier 51, and a conical scale vernier sliding groove 54 is opened below the inclined surface of the conical scale measuring head 52. The interior of the conical scale vernier sliding groove 54 is slidably connected to the slider 53. By sliding the slider 53 in the conical scale vernier sliding groove 54, the conical scale vernier 51 can slide on the inclined surface of the conical scale measuring head 52 along the direction of the conical scale vernier sliding groove 54.

[0029] During specific use, insert the handheld measuring rod 1 into the motor through the measuring hole reserved on the motor end cover. Turn on the switch 25 to power the LED small lamp 22 with a button battery, so that the LED small lamp 22 serves as measuring illumination. Insert the conical ruler measuring head 52 into the stator-rotor air gap. When inserting, the conical ruler vernier 51 abuts against the stator or rotor core, and the conical ruler measuring head 52 is pushed into the air gap. Under the action of the movable slot 43, a relative displacement is generated with the vernier, and at the same time, the linkage mechanism 4 moves together to drive the digital display vernier scale 8 at the end of the handheld measuring rod 1 to move synchronously until it can no longer be pushed into the air gap. This indicates that the thickness of the conical ruler measuring head 52 at this position is the air gap value, and the distance that the digital display vernier scale 8 moves also generates a reading. At this time, both the scale where the conical ruler vernier 51 is located and the reading of the digital display vernier caliper are the air gap values, and the two values are equivalent, both being the final measurement values.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An improved measuring tool for the air gap between the stator and rotor of a motor, comprising a handheld measuring rod (1), characterized in that: The top of the handheld measuring rod (1) is fixedly mounted with an illumination mechanism (2) by means of screws, the end of the handheld measuring rod (1) is fixedly connected with a conical ruler measuring mechanism (5), the tail of the handheld measuring rod (1) is mounted with a ruler body (6), the side wall of the ruler body (6) is provided with scale lines (7), the side wall of the ruler body (6) is slidably connected with a vernier ruler (8), and the conical ruler measuring mechanism (5) is transmission-connected with an inner measuring claw (9) of the vernier ruler (8) via a linkage mechanism (4); The linkage mechanism (4) comprises a connecting rod (41), a rotating wheel (42) and a movable groove (43); the movable groove (43) is provided inside the conical ruler measuring mechanism (5); the rotating wheel (42) is slidably connected inside the movable groove (43); the rotating wheel (42) is rotatably connected to one end of the connecting rod (41) via a pin; and the other end of the connecting rod (41) is mounted to an inner measuring claw (9) of a vernier ruler (8) via a pin; The conical ruler measuring mechanism (5) comprises a conical ruler vernier (51), a conical ruler measuring head (52), a slider (53), and a conical ruler vernier sliding groove (54); the end of the handheld measuring rod (1) is fixedly connected to the conical ruler measuring head (52); the conical ruler vernier (51) is slidably connected to the inclined surface of the conical ruler measuring head (52); the movable groove (43) is formed on the side wall of the conical ruler vernier (51); the bottom side wall of the conical ruler vernier (51) is fixedly connected to the slider (53); the conical ruler vernier sliding groove (54) is formed below the inclined surface of the conical ruler measuring head (52); the interior of the conical ruler vernier sliding groove (54) is slidably connected to the slider (53).

2. An improved measuring tool for the air gap between the stator and rotor of a motor according to claim 1, characterized in that: The lighting mechanism (2) comprises a mounting frame (21), an LED small lamp (22), a threaded groove (23), a bolt (24), a switch (25) and a cavity (26); the mounting frame (21) is mounted on the top of the handheld measuring rod (1) by means of screws; the LED small lamp (22) is mounted inside the mounting frame (21); the cavity (26) is provided inside the mounting frame (21); and the connecting rod (41) penetrates into the cavity (26) from one end and exits from the other end.

3. An improved measuring tool for the air gap between the stator and rotor of a motor according to claim 2, characterized in that: A switch (25) is installed at the tail of the LED small lamp (22); an LED small lamp battery box (3) is arranged inside the handheld measuring rod (1); a button battery is installed inside the LED small lamp battery box (3); a switch (25) is installed at the tail of the LED small lamp (22); and the button battery is electrically connected to the LED small lamp (22) via the switch (25).

4. An improved measuring tool for the air gap between the stator and rotor of a motor according to claim 2, characterized in that: A thread groove (23) is formed on the top surface of the mounting frame (21), and a bolt (24) is connected to the inner thread of the thread groove (23), and the bottom end of the bolt (24) abuts against the side wall of the LED small lamp (22).

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