Starting motor stator pole shoe welding angle measuring instrument

Abstract

The invention discloses a starting motor stator pole shoe welding angle measuring instrument which comprises a stator shell, at least four pole shoes are welded on the inner wall of the stator shell, and the starting motor stator pole shoe welding angle measuring instrument further comprises a measuring assembly; the positioning part penetrates through the measuring assembly and the positioning connecting screw rod, and the positioning connecting screw rod is in threaded fit with the positioning part; the pole shoe clamping block comprises a head part, a middle part and a bottom part, the bottom part is fixedly connected with the positioning component, and the bottom part is further movably connected with the positioning connecting screw rod; clamping grooves are formed in the two radial end faces of the middle part, the pole shoes are located in the clamping grooves, each clamping groove is provided with two clamping shoulders, the axial end faces of the clamping shoulders are trapezoidal, a first interval and a second interval are formed between every two adjacent pole shoes, and the two clamping shoulders are located in the first interval and the second interval respectively. The welding efficiency of motor stator pole shoe welding is improved, the detection time is saved, and meanwhile the product quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of starting motors, and particularly relates to a measuring instrument for the welding angle of a starting motor stator pole shoe. Background Art

[0002] The pole shoe is a unique structure of electromagnets, permanent magnets, and motor magnetic poles. Some people call it the magnetic pole head. It is an indispensable part in electromagnets and permanent magnets. The function of the pole shoe is to obtain a better linear distribution of the magnetic field. It is composed of two magnetic circuits with the same structure. At this time, in order to obtain a better linear distribution, a pole shoe will be installed on the magnetic pole end face.

[0003] In the prior art, when the stator housing and the pole shoe are welded, since the pole shoe is welded inside the stator housing, the processing is difficult, and it is often easy to weld skew and the angle is incorrect. Once the welding angle of the pole shoe is incorrect, it will cause the stator and rotor of the starting motor to be stuck, resulting in the starting motor being unable to be used normally. At present, in order to detect whether the welding angle of the pole shoe is skew, it is usually necessary to send the welded stator housing and pole shoe to a coordinate measuring room for detection. However, the coordinate measuring equipment is huge and cannot be directly placed on the production site. Therefore, when the welded stator housing and pole shoe need to be sent for inspection, a lot of time will be wasted, delaying the production progress. Moreover, this detection method is usually a sampling inspection, and it is impossible to ensure the consistency of the welding angle, and it is also difficult to ensure the consistency of the product quality. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a measuring instrument for the welding angle of a starting motor stator pole shoe.

[0005] The technical solution for solving the above technical problems is as follows: A measuring instrument for the welding angle of a starting motor stator pole shoe, including a stator housing, at least four pole shoes are welded on the inner wall of the stator housing, and further includes: A measuring component; A positioning member, which passes through the measuring component; A positioning connection screw, which is in threaded cooperation with the positioning member; A pole shoe clamping block, the pole shoe clamping block includes a head, a middle part, and a bottom. The bottom is fixedly connected to the positioning member, and the bottom is also movably connected to the positioning connection screw; The two radial end faces of the middle part are provided with clamping grooves. The pole shoes are located in the clamping grooves. The clamping grooves have two clamping shoulders. The axial end faces of the clamping shoulders are trapezoidal. There is a first spacing and a second spacing between two adjacent pole shoes. The two clamping shoulders are respectively located in the first spacing and the second spacing.

[0006] Furthermore, it includes: A positioning disk and a measuring disk; The positioning disk includes a disk part and a shaft part; The measuring disk includes a lower disk portion and a shaft body portion; A first stepped hole is provided at the axial end of the shaft portion, and a second through hole is provided at the axial end of the shaft body portion. The first stepped hole communicates with the second through hole; The shaft body portion is sleeved on the shaft portion through the second through hole; The positioning member passes through the first stepped hole, and one end of the positioning member is connected to the bottom of the pole shoe clamping block, and the other end of the positioning member abuts against the step of the first stepped hole.

[0007] Furthermore, the positioning member includes; A rod portion, which is connected to the bottom of the pole shoe clamping block; A nut portion, which abuts against the step of the first stepped hole; The positioning member is provided with a through hole, and the positioning connection screw passes through the through hole and is movably connected to the bottom of the pole shoe clamping block.

[0008] Furthermore, an axial counterbore is provided at the axial end of the bottom, and the positioning connection screw is in clearance fit with the axial counterbore.

[0009] Furthermore, an annular groove and a notch are provided at the axial end of the shaft body portion of the measuring disk, and the axial end of the stator housing is stuck in the annular groove.

[0010] Furthermore, it further includes: a clip, which is installed in the notch and also cooperates with the stator housing.

[0011] Furthermore, scale lines are provided on both the disk portion and the lower disk portion, and the scale lines on the disk portion cooperate with the scale lines on the lower disk portion.

[0012] Furthermore, a rotating rod is provided in the radial direction of the shaft body portion of the measuring disk.

[0013] The beneficial effects of the present invention are as follows: The present invention measures the welding angle of the pole shoe through the cooperation of the positioning member and the measuring component. The present invention is small in size and easy to operate. Using the present invention to measure the welding angle of the starting motor stator pole shoe, the measurement efficiency is high, and it can be directly placed at the production site without sending the welded stator housing and pole shoe to the coordinate measuring room for inspection, saving a large amount of time and improving the production efficiency. At the same time, placing it at the production site can measure each motor stator pole shoe after welding, improving the product quality. Description of the Drawings

[0014] Figure 1 It is a three-dimensional view of the measuring instrument for the welding angle of the starting motor stator pole shoe of the present invention, the stator housing, and the pole shoe; Figure 2 It is a front view of the measuring instrument for the welding angle of the starting motor stator pole shoe of the present invention, the stator housing, and the pole shoe; Figure 3 It is a three-dimensional view of the pole shoe clamping block of the present invention; Figure 4 is a perspective view of the positioning plate of the present invention; Figure 5 is a perspective view of the measuring plate of the present invention; Figure 6 is a sectional view of the welding angle measuring instrument for the stator pole shoe of the starting motor of the present invention, the stator housing and the pole shoe.

[0015] Reference numerals in the drawings: stator housing 1, pole shoe 2, positioning member 3, rod portion 3-1, nut portion 3-2, through hole 3-12, pole shoe clamping block 4, head portion 4-1, middle portion 4-2, card slot 4-2a, shoulder 4-2aa, bottom portion 4-3, axial counterbore 4-3a, positioning plate 10, plate portion 10-1, shaft portion 10-2, first stepped hole 10-2a, measuring plate 11, lower plate portion 11-1, shaft body portion 11-2, annular groove 11-2b, notch 11-2c, second through hole 11-2a, clip 20, positioning connection screw 30, rotating rod 40, first scale line 50, second scale line 60. Detailed implementation manners

[0016] The present invention will be further described below in conjunction with the drawings and specific implementation manners.

[0017] As Figures 1 to 6 shown, a welding angle measuring instrument for the stator pole shoe of a starting motor includes a stator housing 1, and at least four pole shoes 2 are welded on the inner wall of the stator housing 1. The welding angle measuring instrument further includes: a measuring assembly; a positioning member 3, and the positioning member 3 passes through the measuring assembly; a positioning connection screw 30, and the positioning connection screw 30 is in threaded cooperation with the positioning member 3; a pole shoe clamping block 4, the pole shoe clamping block 4 includes a head portion 4-1, a middle portion 4-2, and a bottom portion 4-3. The bottom portion 4-3 is fixedly connected to the positioning member 3, and the bottom portion 4-3 is also movably connected to the positioning connection screw 30; two radial end faces of the middle portion 4-2 are provided with card slots 4-2a, the pole shoes 2 are located in the card slots 4-2a, the card slots 4-2a have two shoulders 4-2aa, the axial end faces of the shoulders 4-2aa are trapezoidal, there is a first spacing and a second spacing between two adjacent pole shoes 2, and the two shoulders 4-2aa are respectively located in the first spacing and the second spacing.

[0018] In this embodiment, before measurement, first, four pole shoes 2 are welded to the inner wall of the stator housing 1, and then positioning and measurement are carried out through the positioning component 3 and the measurement component. During the measurement process, the pole shoe 2 is stuck in the slot 4-2a of the pole shoe clamping block 4. Among them, the width of the slot 4-2a is greater than the width of the pole shoe 2. The pole shoe clamping block 4 is forged to ensure its strength and increase its service life. When the pole shoe 2 is stuck in the slot 4-2a of the pole shoe clamping block 4, the two shoulders 4-2aa of the two slots 4-2a are both within the first spacing and the second spacing between the pole shoes 2 (specifically as shown in Figure 2 shown).

[0019] The measurement component includes: a positioning disk 10 and a measurement disk 11; The positioning disk 10 includes a disk portion 10-1 and a shaft portion 10-2; The measurement disk 11 includes a lower disk portion 11-1 and a shaft body portion 11-2; The axial end of the shaft portion 10-2 is provided with a first stepped hole 10-2a, and the axial end of the shaft body portion 11-2 is provided with a second through hole 11-2a, and the first stepped hole 10-2a is communicated with the second through hole 11-2a; The shaft body portion 11-2 is sleeved on the shaft portion 10-2 through the second through hole 11-2a; The positioning component 3 passes through the first stepped hole 10-2a, and one end of the positioning component 3 is connected to the bottom 4-3 of the pole shoe clamping block 4, and the other end of the positioning component 3 abuts against the step of the first stepped hole 10-2a.

[0020] The positioning component 3 includes; a rod portion 3-1, and the rod portion 3-1 is connected to the bottom 4-3 of the pole shoe clamping block 4; a nut portion 3-2, and the nut portion 3-2 abuts against the step of the first stepped hole 10-2a; The positioning component 3 is provided with a through hole 3-12, and the positioning connection screw 30 passes through the through hole 3-12 and is movably connected to the bottom 4-3 of the pole shoe clamping block 4.

[0021] The axial end of the bottom 4-3 is provided with an axial counterbore 4-3a, and the positioning connection screw 30 is in clearance fit with the axial counterbore 4-3a.

[0022] The axial end of the shaft body portion 11-2 of the measurement disk 11 is provided with an annular groove 11-2b and a notch 11-2c, and the axial end of the stator housing 1 is stuck in the annular groove 11-2b.

[0023] It further includes: a clip 20, the clip 20 is installed in the notch 11-2c, and the clip 20 also cooperates with the stator housing 1.

[0024] The first scale line 50 is provided on the disc part 10-1, and the second scale line 60 is provided on the lower disc part 11-1. The first scale line 50 and the second scale line 60 cooperate with each other.

[0025] A rotating rod 40 is provided on the radial direction of the shaft part 11-2 of the measuring disc 11.

[0026] The working principle of the present invention is as follows: First, four pole shoes 2 with exactly the same structure are welded to the inner wall of the stator housing 1 at equal intervals and symmetrically (observed by the naked eye). Then, the axial counterbore 4-3a on the bottom 4-3 of the pole shoe clamping block 4 is aligned with the positioning connection screw 30, and the positioning connection screw 30 is inserted into the axial counterbore 4-3a to realize the positioning of the pole shoe clamping block 4. Then, hold the rotating rod 40 and rotate the measuring disc 11 to make the second scale line 60 on the lower disc part 11-1 coincide with the zero scale line of the first scale line 50 on the disc part 10-1 of the positioning disc 10, so as to calibrate the measuring disc 11; after calibration, install the stator housing 1 into the annular groove 11-2b at the axial end of the shaft part 11-2 of the measuring disc 11, and use the clip 20 to clamp the stator housing 1 (a notch is provided on the circumferential outer wall surface of the stator housing 1, and the clip 20 passes through the notch to clamp the stator housing 1. The clip 20 is installed in the notch 11-2c at the axial end of the shaft part 11-2 of the measuring disc 11 through bolts), to prevent the stator housing 1 from rotating circumferentially. When installing the stator housing 1 into the annular groove 11-2b at the axial end of the shaft part 11-2 of the measuring disc 11, if the pole shoe 2 is successfully clamped into the card slot 4-2a in the middle part 4-2 of the pole shoe clamping block 4, and the second scale line 60 and the zero scale line of the first scale line 50 always remain coincident, it means that the welding angle of the pole shoe 2 is not skewed. On the contrary, if when installing the stator housing 1 into the annular groove 11-2b at the axial end of the shaft part 11-2 of the measuring disc 11, the pole shoe 2 cannot be clamped into the card slot 4-2a in the middle part 4-2 of the pole shoe clamping block 4, and the second scale line 60 and the zero scale line of the first scale line 50 do not coincide, it means that the welding angle of the pole shoe 2 is skewed and needs to be reworked and welded again.

[0027] In this embodiment, since four pole shoes 2 need to be welded to the inner wall of the positioning housing 1, when performing the detection, it is necessary to rotate the pole shoe clamping block 4, repeat the above measurement method, measure the four pole shoes 2 respectively, and judge whether the pole shoe 2 is skewed and how to rework and weld again by recording the offset amount.

[0028] Finally, it should be noted that the above-described embodiments are merely 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 described 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. A starter motor stator pole shoe welding angle measuring instrument, comprising a stator housing (1), at least four pole shoes (2) being welded on the inner wall of the stator housing (1), characterized in that: Also includes: Measuring components; A positioning component (3), the positioning component (3) passing through the measuring component; A positioning connecting screw (30), wherein the positioning connecting screw (30) is threadably matched with the positioning component (3); A pole shoe clamping block (4), the pole shoe clamping block (4) comprising a head portion (4-1), a middle portion (4-2), and a bottom portion (4-3), the bottom portion (4-3) being fixedly connected to the positioning component (3), and the bottom portion (4-3) being also movably connected to the positioning connection screw rod (30); Two radial end faces of the middle part (4-2) are provided with a clamping groove (4-2a), the pole shoe (2) is located in the clamping groove (4-2a), the clamping groove (4-2a) has two clamping shoulders (4-2aa), the axial end faces of the clamping shoulders (4-2aa) are trapezoidal, a first spacing and a second spacing are provided between two adjacent pole shoes (2), and the two clamping shoulders (4-2aa) are respectively located in the first spacing and the second spacing.

2. The starter motor stator pole shoe welding angle measuring instrument according to claim 1, characterized in that: The measurement kit includes: A positioning disc (10) and a measuring disc (11); The positioning disk (10) comprises a disk portion (10-1) and a shaft portion (10-2); The measuring disc (11) comprises a lower disc portion (11-1) and a shaft portion (11-2); The axial end of the shaft portion (10-2) is provided with a first step hole (10-2a), the axial end of the shaft body portion (11-2) is provided with a second through hole (11-2a), and the first step hole (10-2a) is connected to the second through hole (11-2a); The shaft body portion (11-2) is sleeved on the shaft portion (10-2) through the second through hole (11-2a); The positioning component (3) passes through the first step hole (10-2a), and one end of the positioning component (3) is connected to the bottom (4-3) of the pole shoe clamping block (4), and the other end of the positioning component (3) abuts against the step of the first step hole (10-2a).

3. The starter motor stator pole shoe welding angle measuring instrument according to claim 2, characterized in that: The positioning component (3) comprises: A rod portion (3-1), the rod portion (3-1) being connected to a bottom portion (4-3) of a pole shoe clamping block (4); A nut portion (3-2), the nut portion (3-2) abutting against a step of the first step hole (10-2a); The positioning component (3) is provided with a through hole (3-12), and the positioning connection screw rod (30) passes through the through hole (3-12) and is movably connected to the bottom (4-3) of the pole shoe clamping block (4).

4. A starter motor stator pole shoe welding angle measuring instrument according to claim 3, characterized in that: An axial countersunk hole (4-3a) is provided at the axial end of the bottom (4-3), and a positioning connection screw rod (30) is clearance-matched with the axial countersunk hole (4-3a).

5. The starter motor stator pole shoe welding angle measuring instrument according to claim 2, characterized in that: An annular groove (11-2b) and a notch (11-2c) are provided at the axial end of the shaft body portion (11-2) of the measuring disc (11), and the axial end of the stator housing (1) is clamped in the annular groove (11-2b).

6. A starter motor stator pole shoe welding angle measuring instrument according to claim 5, characterized in that: Also includes: A clip (20) is installed in the notch (11-2c), and the clip (20) is also matched with the stator housing (1).

7. The starter motor stator pole shoe welding angle measuring instrument according to claim 2, characterized in that: The disk portion (10-1) is provided with a first scale line (50), and the lower disk portion (11-1) is provided with a second scale line (60), and the first scale line (50) and the second scale line (60) cooperate with each other.

8. The starter motor stator pole shoe welding angle measuring instrument according to claim 2, characterized in that: A rotating rod (40) is provided in the radial direction of the shaft body portion (11-2) of the measuring disc (11).

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