Device for measuring outer diameter of rotor coil of alternating current motor

Abstract

The invention provides an AC motor rotor coil external diameter measuring device. The device comprises a main support; the coil supporting part is connected with the main bracket; one end of the measuring block is in contact with the circumferential surface of the measured coil; the auxiliary support is located above the coil supporting component and connected with the main support, the measuring block is further movably matched with the auxiliary support, a first through hole is further formed in the auxiliary support, and the other end of the measuring block is in clearance fit with the first through hole; the mounting plate is connected with the main support, a second through hole is formed in the mounting plate, and the first through hole is communicated with the second through hole; the numerical value displayer comprises a displayer body and a measuring head, the displayer body is installed on the installation plate, and the measuring head is inserted into the second through hole and matched with the axial end of the measuring block. According to the invention, the external diameter of the AC motor rotor coil can be accurately measured, the operation is simple, and the measurement error is small.

Description

Technical Field

[0001] The present invention relates to the technical field of AC motor test tooling, and particularly to a device for measuring the outer diameter of an AC motor rotor coil. Background Art

[0002] After the winding of the rotor coil of an AC motor is completed, it is necessary to ensure that the maximum outer diameter of the rotor coil is consistent with the designed outer diameter. If the maximum outer diameter of the coil exceeds the designed maximum outer diameter by too much, then when assembling the claw poles, the rotor coil will contact the claw poles, causing the motor not to generate electricity, and in severe cases, the motor will be directly burned. At present, only a vernier caliper can be used to roughly measure the maximum outer diameter of the rotor coil, and it cannot guarantee that the measured position is the maximum outer diameter of the rotor coil. This measurement method has a large error and affects the quality of the motor. Summary of the Invention

[0003] In view of the above problems, the present invention provides a device for measuring the outer diameter of an AC motor rotor coil.

[0004] The technical solution for solving the above technical problems is as follows:

[0005] A device for measuring the outer diameter of an AC motor rotor coil, including a main bracket;

[0006] Further, it also includes:

[0007] A coil support member, which is connected to the main bracket;

[0008] A measuring block, one end of which contacts the circumferential surface of the coil to be measured;

[0009] A sub-bracket, which is located above the coil support member and is connected to the main bracket. The measuring block is also movably matched with the sub-bracket. A first through hole is provided on the sub-bracket, and the other end of the measuring block is in clearance fit with the first through hole;

[0010] A mounting plate, which is connected to the main bracket. A second through hole is provided on the mounting plate, and the first through hole is communicated with the second through hole;

[0011] A digital display, which includes a display body and a probe. The display body is mounted on the mounting plate, and the probe is inserted into the second through hole and is in cooperation with the axial end of the measuring block.

[0012] Further, a first groove and a second groove are provided on the main bracket. A threaded hole is provided in the first groove, and the coil support member is in threaded fit with the threaded hole. The sub-bracket is located in the second groove.

[0013] Further, the sub-bracket includes a bottom and a waist. The first through hole is provided on the bottom, and the bottom is connected to the main bracket by bolts. A third groove is provided on the waist.

[0014] Further, the measuring block includes a rod portion and a measuring head. The rod portion is in clearance fit with the first through hole and the second through hole. The axial end of the rod portion is in fit with the probe of the digital display, and the axial end of the measuring head contacts the circumferential surface of the coil under test. The measuring head is also in sliding fit with the third groove.

[0015] Further, a shift lever is also provided on the measuring head.

[0016] The beneficial effects of the present invention are as follows: By contacting the measuring block with the circumferential surface of the rotor coil and viewing the change in value in real time through the digital display, the maximum outer diameter of the rotor coil is measured. The maximum outer diameter value of the rotor coil is obtained through measurement, so as to judge whether the rotor coil will contact the claw pole when assembling the claw pole. The present invention has high measurement accuracy and small error, avoiding the problem that the motor does not generate electricity due to the over-large outer diameter of the rotor coil contacting the claw pole, and improving the quality of the alternator. Description of the Drawings

[0017] Figure 1 is a perspective view of the measuring device for the outer diameter of the rotor coil of the AC motor of the present invention and the coil under test;

[0018] Figure 2 is a sectional view of the measuring device for the outer diameter of the rotor coil of the AC motor of the present invention;

[0019] Figure 3 is a perspective view of the main bracket of the measuring device for the outer diameter of the rotor coil of the AC motor of the present invention;

[0020] Figure 4 is a perspective view of the digital display of the measuring device for the outer diameter of the rotor coil of the AC motor of the present invention;

[0021] Figure 5 is a perspective view of the measuring block of the measuring device for the outer diameter of the rotor coil of the AC motor of the present invention;

[0022] Figure 6 is a perspective view of the auxiliary bracket of the measuring device for the outer diameter of the rotor coil of the AC motor of the present invention.

[0023] Reference signs in the drawings: main bracket 1, first groove 1-1, second groove 1-2, threaded hole 1-3, coil support member 2, measuring block 3, rod portion 3-1, measuring head 3-2, shift lever 3-2a, auxiliary bracket 4, first through hole 4-1, bottom 4a, waist 4b, third groove 4c, mounting plate 5, second through hole 5-1, digital display 6, display body 6-1, probe 6-2, bottom plate 10, standard part A, coil under test B. Detailed Embodiment

[0024] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0025] As Figures 1 to 6 shown, an outer diameter measuring device for an AC motor rotor coil includes a main bracket 1, and further includes:

[0026] A coil support member 2, which is connected to the main bracket 1;

[0027] A measuring block 3, one end of which contacts the circumferential surface of the coil to be measured;

[0028] A sub-bracket 4, which is located above the coil support member 2 and is connected to the main bracket 1. The measuring block 3 is also movably matched with the sub-bracket 4. A first through hole 4-1 is provided on the sub-bracket 4, and the other end of the measuring block 3 is in clearance fit with the first through hole 4-1;

[0029] A mounting plate 5, which is connected to the main bracket 1. A second through hole 5-1 is provided on the mounting plate 5, and the first through hole 4-1 is communicated with the second through hole 5-1;

[0030] A numerical display 6, which includes a display body 6-1 and a probe 6-2. The display body 6-1 is mounted on the mounting plate 5, and the probe 6-2 is inserted into the second through hole 5-1 and is in cooperation with the axial end of the measuring block 3.

[0031] In this embodiment, the first through hole 4-1 and the second through hole 5-1 are concentric. The first through hole 4-1 and the second through hole 5-1 limit the measuring block 3 from moving radially when moving up and down, so that the measuring block 3 always moves vertically. In this embodiment, the numerical display 6 is preferably a dial indicator. When measuring the outer diameter of the rotor coil, as the measuring block 3 contacts the probe 6-2 of the numerical display 6, the value on the display body 6-1 changes accordingly. The mounting plate 5 is connected to the main bracket 1 by a plurality of bolts.

[0032] The main bracket 1 is provided with a first groove 1-1 and a second groove 1-2. A threaded hole 1-3 is provided in the first groove 1-1, and the coil support member 2 is in threaded fit with the threaded hole 1-3. The sub-bracket 4 is located in the second groove 1-2.

[0033] In this embodiment, in order to facilitate the replacement of the coil support member 2 with different outer diameters to meet the measurement of rotor coils with different sizes, the coil support member 2 is threadedly connected to the main bracket 1. The coil support member 2 is in a cylindrical shape. During measurement, the rotor coil to be measured is sleeved on the coil support member 2, and then the measurement can be carried out.

[0034] The sub-bracket 4 includes a bottom 4a and a waist 4b. The first through hole 4-1 is provided on the bottom 4a. The bottom 4a is connected to the main bracket 1 by bolts, and a third groove 4c is provided on the waist 4b.

[0035] The measuring block 3 includes a rod portion 3-1 and a measuring head 3-2. The rod portion 3-1 is in clearance fit with the first through hole 4-1 and the second through hole 5-1. The axial end of the rod portion 3-1 is in fit with the probe 6-2 of the digital display 6. The axial end of the measuring head 3-2 contacts the circumferential surface of the coil to be measured. The measuring head 3-2 is also in sliding fit with the third groove 4c.

[0036] In this embodiment, during the measurement process, since the measuring block 3 moves up and down, in order to prevent the measuring block 3 from skewing during the measurement process, a third groove 4c is provided on the sub-bracket 4 to guide the measuring block 3 through the third groove 4c.

[0037] A dial rod 3-2a is further provided on the measuring head 3-2.

[0038] The measurement process of the present invention is as follows: First, select a coil support member 2 suitable for the inner diameter of the current coil B to be measured, and install the coil support member 2 on the main bracket 1 through the threaded hole 1-3. Then, select a standard part A with the same designed outer diameter as the current coil B to be measured and install it on the coil support member 2. Then, zero the digital display 6. Next, rotate the standard part A and observe whether the value on the digital display 6 changes. If there is no change, it means that the outer diameter of the currently selected standard part A conforms to the outer diameter of the current coil B to be measured. Then, remove the standard part A, install the coil B to be measured on the coil support member 2. Then, hold the dial rod 3-2a by hand, place the measuring head 3-2 of the measuring block 3 on the outer peripheral surface of the coil B to be measured, and rotate the coil B to be measured. As the coil B to be measured rotates, the rod portion 3-1 of the measuring block 3 contacts the probe 6-2 of the digital display 6, and the value on the display body 6-1 changes. Record the maximum value displayed on the display body 6-1. Then, use the outer diameter dimension of the standard part A ± the maximum value displayed on the display body 6-1 = the outer diameter dimension of the coil B to be measured. Finally, the measurement is completed.

[0039] Finally, it should be noted that: The above-described embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting it, let alone limiting the protection scope of the present invention; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the protection scope of the claims.

Claims

1. An outer diameter measuring device for a rotor coil of an AC motor, comprising a main bracket (1), characterized in that, It further includes: A coil support member (2), which is connected to the main bracket (1); A measuring block (3), one end of which contacts the circumferential surface of the coil to be measured; A sub-bracket (4), which is located above the coil support member (2) and is connected to the main bracket (1). The measuring block (3) is also movably engaged with the sub-bracket (4). A first through hole (4-1) is further provided on the sub-bracket (4), and the other end of the measuring block (3) is in clearance fit with the first through hole (4-1); A mounting plate (5), which is connected to the main bracket (1). A second through hole (5-1) is provided on the mounting plate (5), and the first through hole (4-1) is communicated with the second through hole (5-1); A numerical display (6), which includes a display body (6-1) and a probe (6-2). The display body (6-1) is mounted on the mounting plate (5), and the probe (6-2) is inserted into the second through hole (5-1) and is engaged with the axial end of the measuring block (3).

2. The outer diameter measuring device for the rotor coil of an AC motor according to claim 1, characterized in that A first groove (1-1) and a second groove (1-2) are provided on the main bracket (1). A threaded hole (1-3) is provided in the first groove (1-1), and the coil support member (2) is in threaded fit with the threaded hole (1-3). The sub-bracket (4) is located in the second groove (1-2).

3. The outer diameter measuring device for the rotor coil of an AC motor according to claim 2, characterized in that, The sub-bracket (4) includes a bottom (4a) and a waist (4b). The first through hole (4-1) is provided on the bottom (4a), and the bottom (4a) is connected to the main bracket (1) by bolts. A third groove (4c) is provided on the waist (4b).

4. The outer diameter measuring device for the rotor coil of an AC motor according to claim 3, characterized in that, The measuring block (3) includes a rod portion (3-1) and a measuring head (3-2). The rod portion (3-1) is in clearance fit with the first through hole (4-1) and the second through hole (5-1). The axial end of the rod portion (3-1) is engaged with the probe (6-2) of the numerical display (6). The axial end of the measuring head (3-2) contacts the circumferential surface of the coil to be measured, and the measuring head (3-2) is also in sliding fit with the third groove (4c).

5. The outer diameter measuring device for the rotor coil of an AC motor according to claim 4, wherein, A lever (3-2a) is further provided on the measuring head (3-2).

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