Rotor coil height detection mechanism

Abstract

The utility model discloses a rotor coil height detection mechanism which comprises a base and a placing seat arranged above the base in a clearance mode, the placing seat is detachably connected with the base through a plurality of supporting rods, a vertical sliding hole is formed in the placing seat, and a cylindrical top head is arranged in the vertical sliding hole in a sliding mode. The top surface of the cylindrical top head is provided with a sinking groove used for accommodating an armature shaft, the base is provided with a measuring meter, and a measuring head of the measuring meter is vertically upward and abuts against the bottom of the cylindrical top head; according to the scheme, the structure is simple, the operation is convenient, and accurate measurement of the minimum gap height between the rotor coil and the armature shaft step can be realized.

Description

Technical Field

[0001] This utility model relates to the field of motor measuring equipment technology, specifically to a rotor coil height detection mechanism. Background Technology

[0002] In the context of the rapid advancement of the global automotive manufacturing industry, the starter motor, as a crucial piece of equipment, requires strict quality control. Within the motor, the rotor is a vital component, such as... Figure 1 and Figure 2 As shown, it includes a motor rotor 15, a rotor coil 16 covering the motor rotor, an armature shaft 18 at one end of the rotor coil, and an armature shaft step 17 at the end of the armature shaft near the rotor coil. To ensure the performance of the motor rotor, the minimum gap height d between the rotor coil and the armature shaft step in the motor rotor needs to meet the preset requirements. Therefore, it is necessary to measure the minimum gap height between the rotor coil and the armature shaft step. However, since the rotor coil cannot guarantee that all coils are at the same height, it is impossible to accurately measure the minimum gap height using a height gauge or depth gauge. Utility Model Content

[0003] To address the aforementioned shortcomings of the existing technology, this utility model provides a rotor coil height detection mechanism, which solves the problem of accurately measuring the minimum gap height between the rotor coil and the armature shaft step.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A rotor coil height detection mechanism is provided, comprising a base and a placement seat with a gap disposed above the base. The placement seat is detachably connected to the base via several support rods. A vertical sliding hole is provided on the placement seat, and a cylindrical top is slidably disposed in the vertical sliding hole. The top surface of the cylindrical top has a groove for accommodating the armature shaft. A measuring gauge is mounted on the base, and the measuring head of the measuring gauge is vertically upward and abuts against the bottom of the cylindrical top.

[0006] Furthermore, an annular boss is provided on the inner wall of the vertical sliding hole, the outer wall of the cylindrical top is in sliding contact with the inner wall of the annular boss, a limiting ring is fitted on the outer wall of the cylindrical top, a spring cover is detachably provided at the lower end of the vertical sliding hole, and a spring-loaded spring is fitted on the cylindrical top located between the limiting ring and the spring cover.

[0007] Furthermore, the top of the cylindrical top protrudes from the top surface of the placement seat under the action of the spring force of the spring, and the upper end of the limiting ring abuts against the lower end of the annular boss.

[0008] Furthermore, the outer wall of the cylindrical top makes sliding contact with the inner wall of the vertical sliding hole, and the frictional force between the cylindrical top and the vertical sliding hole is not less than the weight of the cylindrical top itself.

[0009] Furthermore, the radial dimension of the sink groove is smaller than the radial dimension of the armature shaft step, and the radial dimension of the vertical sliding hole is larger than the radial dimension of the armature shaft step.

[0010] Furthermore, the top surface of both the cylindrical top and the top surface of the base are horizontal.

[0011] Furthermore, the bottom of the cylindrical top is provided with a pressure head for contacting the measuring head of the measuring instrument.

[0012] Furthermore, a bracket is provided on the base, and the measuring instrument is detachably connected to the bracket via a connector.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. This solution enables accurate measurement of the minimum clearance height between the rotor coil and the armature shaft step. In use, the measuring instrument is mounted on a bracket and adjusted to a suitable height until the measuring head of the instrument abuts against the bottom of the cylindrical top, with the top surface of the cylindrical top protruding beyond the top surface of the mounting base. A flat calibration block is placed on the mounting base, and the top surface of the cylindrical top is pressed down until it is flush with the top surface of the mounting base. At this point, the measuring instrument is zeroed. Then, the flat calibration block is removed, and the armature shaft of the motor rotor is placed in the recess. Simultaneously, the motor rotor presses down on the cylindrical top through the armature shaft step until the rotor coil contacts the top surface of the mounting base. The reading on the measuring instrument at this point is the minimum clearance height.

[0015] 2. There are two implementation methods for the sliding fit between the cylindrical mandrel and the vertical sliding hole in this scheme. The first method uses the cooperation of a limiting ring, annular boss, and spring-loaded spring to allow the cylindrical mandrel to automatically spring back and protrude from the top surface of the placement seat after measurement. This method is suitable for batch measurement of rotor coils. At the same time, when the planar calibration block presses down on the cylindrical mandrel, the spring-loaded spring can keep the top surface of the cylindrical mandrel and the top surface of the placement seat in a stable and flush state. The second method uses the sliding contact between the outer wall of the cylindrical mandrel and the inner wall of the vertical sliding hole. This method is simple in structure. Before measurement, the top surface of the cylindrical mandrel needs to be manually protruded from the top surface of the placement seat. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the motor rotor.

[0017] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0018] Figure 3 This is a schematic diagram of the rotor coil height detection mechanism.

[0019] Figure 4 This is a cross-sectional view of the solution in the first embodiment, showing its interaction with the motor rotor.

[0020] Figure 5 This is a cross-sectional view of the second implementation of this solution.

[0021] Among them, 1. base, 2. placement seat, 3. support rod, 4. vertical sliding hole, 5. cylindrical top, 6. sinker, 7. measuring gauge, 8. annular boss, 9. limiting ring, 10. compression spring cover, 11. rebound compression spring, 12. pressure head, 13. bracket, 14. connector, 15. motor rotor, 16. rotor coil, 17. armature shaft step, 18. armature shaft. Detailed Implementation

[0022] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0023] like Figures 3 to 5 As shown, the rotor coil height detection mechanism of this scheme includes a base 1 and a placement seat 2 with a gap set above the base 1. The placement seat 2 is detachably connected to the base 1 through several support rods 3. A vertical sliding hole 4 is provided on the placement seat 2, and a cylindrical top 5 is slidably arranged in the vertical sliding hole 4. A groove 6 for accommodating the armature shaft 18 is provided on the top surface of the cylindrical top 5. A measuring gauge 7 is installed on the base 1. Specifically, a bracket 13 is provided on the base 1, and the measuring gauge 7 is detachably connected to the bracket 13 through a connector 14. The measuring head of the measuring gauge 7 is vertically upward and abuts against the bottom of the cylindrical top 5. A pressure head 12 for abutting against the measuring head of the measuring gauge 7 is provided at the bottom of the cylindrical top 5. The measuring gauge 7 can preferably be a digital dial indicator.

[0024] Among them, the radial dimension of the sink 6 is smaller than the radial dimension of the armature shaft step 17, and the radial dimension of the vertical sliding hole 4 is larger than the radial dimension of the armature shaft step 17; the top surface of the cylindrical top 5 and the top surface of the placement seat 2 are both horizontal planes.

[0025] This solution enables accurate measurement of the minimum clearance height between the rotor coil 16 and the armature shaft step 17. In use, the measuring instrument 7 is mounted on the bracket 13 and adjusted to a suitable height until the measuring head of the measuring instrument 7 abuts against the bottom of the pressure head 12, and the top surface of the cylindrical top 5 protrudes beyond the top surface of the placement seat 2. A flat calibration block is placed on the placement seat 2, and the top surface of the cylindrical top 5 is pressed down until it is flush with the top surface of the placement seat 2. At this point, the measuring instrument 7 is zeroed. Then, the flat calibration block is removed, and the armature shaft 18 of the motor rotor 15 is placed in the recess 6. Simultaneously, the motor rotor 15 presses down on the cylindrical top 5 through the armature shaft step 17 until the rotor coil 16 contacts the top surface of the placement seat 2. The reading on the measuring instrument 7 at this point is the minimum clearance height.

[0026] Specifically, before measurement, the bottom surface of the planar calibration block, the top surface of the cylindrical top 5, and the top surface of the placement seat 2 can be cleaned with alcohol and a cloth to avoid affecting the measurement accuracy due to impurities.

[0027] In practical implementation, the sliding fit between the cylindrical top 5 and the vertical sliding hole 4 in this scheme has two implementation methods:

[0028] In the first embodiment, an annular boss 8 is provided on the inner wall of the vertical sliding hole 4. The outer wall of the cylindrical top 5 slides in contact with the inner wall of the annular boss 8. A limiting ring 9 is sleeved on the outer wall of the cylindrical top 5. A spring cover 10 is detachably provided at the lower end of the vertical sliding hole 4. A rebound spring 11 is sleeved on the cylindrical top 5 located between the limiting ring 9 and the spring cover 10. Under the elastic force of the rebound spring 11, the top of the cylindrical top 5 protrudes from the top surface of the placement seat 2. Furthermore, the upper end of the limiting ring 9 abuts against the lower end of the annular boss 8. Through the cooperation of the limiting ring 9, the annular boss 8, and the rebound spring 11, this scheme enables the cylindrical top head 5 to automatically spring back and reposition itself after measurement and protrude from the top surface of the placement seat 2. This is suitable for batch measurement of the rotor coil 16. At the same time, when the plane calibration block presses down on the cylindrical top head 5, the rebound spring 11 can keep the top surface of the cylindrical top head 5 and the top surface of the placement seat 2 in a stable and flush state, thereby improving the measurement accuracy.

[0029] In the second embodiment, the outer wall of the cylindrical top 5 slides in contact with the inner wall of the vertical sliding hole 4, and the friction between the cylindrical top 5 and the vertical sliding hole 4 is not less than the weight of the cylindrical top 5 itself. This arrangement allows the cylindrical top 5 to slide and suspend at any position in the vertical sliding hole 4 through friction. Its structure is simple. Before measurement, the top surface of the cylindrical top 5 needs to be manually protruded from the top surface of the placement seat 2.

Claims

1. A rotor coil height detection mechanism, characterized in that, The device includes a base and a placement seat with a gap above the base. The placement seat is detachably connected to the base via several support rods. The placement seat has a vertical sliding hole, and a cylindrical top is slidably disposed in the vertical sliding hole. The top surface of the cylindrical top has a recess for accommodating the armature shaft. A measuring instrument is mounted on the base, and the measuring head of the measuring instrument is vertically upward and abuts against the bottom of the cylindrical top.

2. The rotor coil height detection mechanism according to claim 1, characterized in that, An annular boss is provided on the inner wall of the vertical sliding hole. The outer wall of the cylindrical top is in sliding contact with the inner wall of the annular boss. A limiting ring is sleeved on the outer wall of the cylindrical top. A compression spring cover is detachably provided at the lower end of the vertical sliding hole. A rebound compression spring is sleeved on the cylindrical top located between the limiting ring and the compression spring cover.

3. The rotor coil height detection mechanism according to claim 2, characterized in that, The top of the cylindrical top protrudes from the top surface of the placement seat under the action of the spring force, and the upper end of the limiting ring abuts against the lower end of the annular boss.

4. The rotor coil height detection mechanism according to claim 1, characterized in that, The outer wall of the cylindrical top is in sliding contact with the inner wall of the vertical sliding hole, and the friction between the cylindrical top and the vertical sliding hole is not less than the weight of the cylindrical top itself.

5. The rotor coil height detection mechanism according to claim 2 or 4, characterized in that, The radial dimension of the sink groove is smaller than the radial dimension of the armature shaft step, and the radial dimension of the vertical sliding hole is larger than the radial dimension of the armature shaft step.

6. The rotor coil height detection mechanism according to claim 5, characterized in that, The top surface of the cylindrical top and the top surface of the placement base are both horizontal planes.

7. The rotor coil height detection mechanism according to claim 1, characterized in that, The bottom of the cylindrical top is provided with a pressure head for contacting the measuring head of the measuring instrument.

8. The rotor coil height detection mechanism according to claim 1, characterized in that, The base is equipped with a bracket, and the measuring instrument is detachably connected to the bracket via a connector.

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