Gap measurement tool

Abstract

This application belongs to the field of gap measurement technology, and particularly relates to a gap measuring tool. The gap measuring tool is used to measure the distance between the stator and the rotor. The gap measuring tool includes a fixing mechanism, a through-hole component, a flipping mechanism, and a measuring mechanism: the fixing mechanism is used to fix it to the stator housing; the through-hole component includes a rod and a mounting base, one end of the rod is rotatably connected to the fixing mechanism, and the other end is connected to the mounting base; the flipping mechanism includes a flipping component and a flipping drive component, one side of the flipping component is rotatably connected to the mounting base; the flipping drive component is connected to the flipping component and is used to drive the flipping component to flip, so that the flipping component can be folded or unfolded relative to the rod; the measuring mechanism includes a measuring module connected to the other side of the flipping component; when the flipping component is in the unfolded state, the measuring module can rotate with the rod to extend between the stator and the rotor, thereby measuring the distance between the stator and the rotor, which is beneficial to improving the efficiency of measuring the distance between the stator and the rotor.

Description

Technical Field

[0001] This application belongs to the field of gap measurement technology, and in particular relates to a gap measurement tool. Background Technology

[0002] The exciter is a crucial component in a nuclear power plant. It's a type of motor that converts electrical energy into magnetic field energy. It's typically used to generate and maintain the magnetic field required in generators, motors, and other equipment to achieve functions such as power transmission, regulation, and control. The exciter consists of a stator and a rotor. The stator includes a housing and multiple magnetic poles. The housing is located outside the rotor, and the magnetic poles are positioned between the housing and the rotor, spaced circumferentially along the rotor. A first gap is formed between adjacent magnetic poles. The housing has a connecting hole that communicates with the first gap, and a second gap is formed between the magnetic poles and the rotor. During each major overhaul of a nuclear power plant, it's necessary to measure the size of this second gap, i.e., the distance between the stator and rotor. However, in practice, measuring this distance is time-consuming, labor-intensive, and prone to significant measurement errors.

[0003] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Summary of the Invention

[0004] The purpose of this application is to provide a gap measuring tool, including but not limited to solving the problems of low efficiency and large measurement error in gap measurement in related technologies.

[0005] To achieve the above objectives, one technical solution adopted in this application is: a gap measuring tool for measuring the distance between the stator and the rotor. The gap measuring tool includes a fixing mechanism, a through-feed component, a flipping mechanism, and a measuring mechanism. The fixing mechanism is used to fix the tool to the stator housing. The through-feed component includes a rod and a mounting base. One end of the rod is rotatably connected to the fixing mechanism so that the rod can rotate around its own axis. The other end of the rod is connected to the mounting base, which is used to abut against the rotor. The flipping mechanism includes a flipping component and a flipping drive component. One side of the flipping component is rotatably connected to the mounting base. The flipping drive component is connected to the flipping component and is used to drive the flipping component to flip so that the flipping component can be folded or unfolded relative to the rod. The measuring mechanism includes a measuring module, which is connected to the other side of the flipping component. When the flipping component is in the unfolded state, the measuring module can rotate with the rod to extend between the stator and the rotor, thereby measuring the distance between the stator and the rotor.

[0006] Optionally, the measuring mechanism includes a measuring sensor, and the measuring module includes a measuring base and a movable component. The measuring base is connected to a flipping component, and the movable component is movably connected to the measuring base. During the process in which at least a portion of the movable component extends between the stator and the rotor as the rod rotates, the movable component can abut against the surface of the magnetic pole facing the rotor, thereby generating movement. The measuring sensor is used to measure the movement of the movable component to obtain the distance between the stator and the rotor.

[0007] Optionally, the measuring module further includes a first elastic element. The movable element includes a rotating part, a first support rod part, and a first abutting part for extending between the stator and the rotor. The rotating part is rotatably connected to the measuring seat. The two ends of the first support rod part are respectively connected to the rotating part and the first abutting part. The first elastic element connects the movable element and the measuring seat. The measuring seat has a second abutting part. When the first abutting part extends between the stator and the rotor, the first abutting part can abut against the magnetic pole under the elastic action of the first elastic element, and the second abutting part abuts against the rotor.

[0008] Optionally, at least one of the first abutting portion and the second abutting portion is a hemispherical portion.

[0009] Optionally, the first elastic element includes a torsion spring, and the measuring mechanism further includes a rotating shaft passing through the rotating part and the measuring seat. The rotating shaft passes through the torsion spring, and the two ends of the torsion spring abut against the movable part and the measuring seat, respectively.

[0010] Optionally, the movable part includes a second support rod and a third abutment part, with the two ends of the second support rod connected to the rotating part and the third abutment part respectively, and the second support rod intersecting with the first support rod; the measuring mechanism includes a transmission assembly and an inner rod, with the rod body movably sleeved outside the inner rod; the transmission assembly connects the third abutment part and the inner rod, and is used to convert the movement of the third abutment part into the movement of the inner rod along its own axial direction; the measuring sensor is connected to the end of the rod body facing away from the mounting seat, and is used to detect the movement of the inner rod along its own axial direction.

[0011] Optionally, the transmission assembly includes a first transmission rod, a second transmission rod, and a rotating corner. The first transmission rod is movably connected to the flipping member and is capable of moving along its own axial direction. The second transmission rod is movably connected to the mounting base and is capable of moving along its own axial direction. The rotating corner is rotatably connected to the mounting base and is located between the inner rod and the second transmission rod. When the flipping component is in the unfolded state, the first transmission rod and the second transmission rod are coaxial, the second transmission rod intersects with the inner rod, the first transmission rod abuts between the third abutting part and the second transmission rod, the second transmission rod abuts between the first transmission rod and one side of the corner, and the inner rod abuts with the other side of the corner, so that when the second transmission rod moves along its own axial direction, it can drive the corner to rotate, thereby driving the inner rod to move along its own axial direction.

[0012] Optionally, the measuring mechanism also includes a threaded fastener, and the measuring seat has a connecting hole and a threaded hole, the threaded hole penetrating the hole wall of the connecting hole radially along the connecting hole; The flipping component includes a base, a fixing part, and a stepped surface formed between the base and the fixing part. One side of the base is rotatably connected to the mounting base, and the fixing part is connected to the other side of the base. The fixing part is located in the connecting hole, and the stepped surface abuts against the side of the measuring base. The outer peripheral surface of the fixing part is provided with a tapered hole, and a threaded fastener is screwed into the threaded hole and abuts against the hole wall of the tapered hole. When the flipping component is in the unfolded state, the center line of the tapered hole is inclined toward the base.

[0013] Optionally, the flipper is provided with a clearance groove for avoiding the movable sleeve when the flipper is in the folded state.

[0014] Optionally, the outer circumferential surface of the rod is provided with a limiting protrusion, and a limiting groove extending along its own axial direction is movably sleeved thereon, the limiting protrusion being used to insert into the limiting groove.

[0015] Optionally, the flip drive also includes an operating handle connected to the end of the movable sleeve facing away from the mounting base.

[0016] Optionally, the fixing mechanism includes a rotary guide sleeve for fixed connection with the housing, the rotary guide sleeve being sleeved outside the movable sleeve; the rotary guide sleeve is provided with a guide hole for the operating handle to pass through, the guide hole including a first hole section and a second hole section, the first hole section extending axially along the rotary guide sleeve, the second hole section extending circumferentially along the rotary guide sleeve, and the second hole section communicating with the end of the first hole section facing the mounting base.

[0017] Optionally, the gap measuring tool further includes a connecting ring and a second elastic element. The fixing mechanism includes a fixed seat for fixing to the housing. The connecting ring is sleeved on the outside of the rod and fixedly connected to the rod. The connecting ring is located between the mounting seat and the fixed seat. The second elastic element is sleeved on the outside of the rod and is located between the connecting ring and the fixed seat. The second elastic element is used to push the mounting seat against the rotor.

[0018] The gap measuring tool provided in this application has at least one of the following technical effects: before the mounting base is inserted into the connecting hole, the flipping part is in a folded state; the mounting base and the rod are inserted between two adjacent magnetic poles of the stator (i.e., the first gap) through the connecting hole until the mounting base abuts against the rotor, the fixing mechanism is fixed to the housing of the stator, the flipping drive drives the flipping part to rotate, the flipping part unfolds, and then the rod is rotated so that the measuring module enters between the stator and the rotor (i.e., the second gap) to measure, thereby obtaining the distance between the stator and the rotor, thus completing the distance measurement between the stator and the rotor; in this process, the gap measuring tool of this application directly uses the connecting hole of the housing, the space between two adjacent magnetic poles, and the space between the stator and the rotor to measure, which can save the operation of disassembling and assembling the protective cover and improve the measurement efficiency; in addition, when the measuring module measures the size of the second gap, the measuring module can obtain stable support through the fixing mechanism to the housing and the abutment of the mounting base against the rotor, thereby effectively improving the accuracy of the measuring module in measuring the distance between the stator and the rotor, and also helping to improve the detection efficiency.

[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the gap measuring tool provided in some embodiments of this application during measurement.

[0022] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0023] Figure 3 for Figure 2 The diagram shows the structure of the gap measuring tool. Figure 1 .

[0024] Figure 4 for Figure 2 The diagram shows the structure of the gap measuring tool. Figure 2 .

[0025] Figure 5 For along Figure 4 Sectional view along the middle BB line.

[0026] Figure 6 for Figure 5 A magnified view of a section at point C.

[0027] Figure 7 for Figure 3 An exploded view of the gap measuring tool shown.

[0028] Figure 8 for Figure 7 The diagram shows the structure of the measurement module.

[0029] Figure 9 for Figure 8 The diagram shows an exploded view of the measurement module.

[0030] Figure 10 for Figure 9 The diagram shows the structure of the measuring seat.

[0031] Figure 11 for Figure 7 The diagram shows the structure of the flipper.

[0032] The following are the labeling elements in the figure: 100. Gap measuring tool; 10. Fixing mechanism; 11. Rotary guide sleeve; 111. Guide hole; 1111. First hole section; 1112. Second hole section; 12. Fixing base; 20. Through-hole component; 21. Rod body; 211. Limiting protrusion; 22. Mounting base; 2201. Second transmission hole; 2202. Third transmission hole; 221. Fourth abutment part; 30. Flipping mechanism; 31. Flipping component; 3101. First transmission hole; 3102. 3103. Stepped surface; 3104. Tapered hole; 3105. Clearance groove; 311. Base part; 3111. Rotating plate part; 3112. Column part; 312. Fixing part; 32. Tilting drive component; 321. Movable sleeve; 3211. Movable body; 3212. Movable joint; 32101. Limiting groove; 322. Connecting rod; 3221. Limiting shaft; 323. Operating handle; 40. Measuring mechanism; 41. Measuring module; 411. Measuring base; 41 11. Second abutting part; 4112. First plate part; 4113. Second plate part; 4114. Connecting part; 4115. Blocking part; 41101. Connecting hole; 41102. Threaded hole; 41103. Second rotating hole; 41104. Clearance hole; 412. Moving part; 4121. Rotating part; 4122. First support rod part; 4123. First abutting part; 4124. Second support rod part; 4125. Third abutting part; 41201 413. First rotating hole; 414. First elastic element; 415. Rotating shaft; 416. Lubricating bushing; 42. Measuring sensor; 43. Transmission assembly; 431. First transmission rod; 432. Second transmission rod; 433. Rotating angle; 44. Inner rod; 51. Connecting ring; 52. Second elastic element; 200. Stator; 210. Housing; 220. Magnetic pole; 2101. First gap; 2102. Connecting hole; 300. Rotor; 301. Second gap. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0035] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0040] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0041] The exciter is a crucial component in a nuclear power plant. It is a type of motor that converts electrical energy into magnetic field energy. It is typically used to generate and maintain the magnetic fields required in generators, motors, and other equipment to enable functions such as power transmission, regulation, and control.

[0042] The exciter includes a stator and a rotor. The rotor is the rotating part of the exciter, consisting of an armature core and armature windings. The stator is the stationary part of the exciter, consisting of pole cores and pole coils. The stator includes a housing and multiple poles. The housing is located outside the rotor, and the multiple poles are located between the housing and the rotor. The multiple poles are distributed circumferentially along the rotor, with a first gap between adjacent poles. The housing has a connecting hole communicating with the first gap, and a second gap is formed between the poles and the rotor.

[0043] During each major overhaul of a nuclear power plant, it is necessary to measure the size of the second gap of the exciter, i.e., the distance between the stator and rotor. In actual measurement, the protective cover of the exciter must be removed. Then, operators apply a coating to an L-shaped feeler gauge and insert it between the stator and rotor. The feeler gauge rubs against the stator and rotor, creating a mark. A vernier caliper is then used to measure the thickness of the friction mark, thus determining the distance between the stator and rotor. The exciter has a complex structure, and the disassembly and installation of the protective cover is time-consuming and labor-intensive. Furthermore, although the exciter is large, the second gap is extremely narrow, only 3mm to 6mm, and the space available for measuring the second gap is also extremely limited; the narrowest point of the first gap is only 18mm, making the measurement of the second gap extremely difficult. The narrow space between the first and second gaps, the slow insertion of the L-shaped feeler gauge between the stator and rotor, and the limited freedom of movement of the L-shaped feeler gauge within the first and second gaps all contribute to non-standard measurement operations and large accuracy deviations. Excessive measurement error can affect the magnetic field distribution of the exciter, thus affecting its excitation performance. In severe cases, it can even cause the stator and rotor of the exciter to collide, resulting in damage to the exciter.

[0044] Based on this, the gap measuring tool of this application embodiment, when in use, first inserts the rod of the inserting member and the mounting base through the first gap between the connecting hole of the housing and the magnetic pole of the stator. The fixing mechanism is fixed to the housing of the stator. After the mounting base abuts against the rotor, the flipping drive is driven to unfold the flipping member. At the same time, the measuring module also unfolds with the flipping member. Then, the rod is rotated, and the rotation of the rod causes the measuring module to extend into the second gap (i.e., between the stator and the rotor). The measuring module measures the size of the second gap, thereby obtaining the distance between the stator and the rotor. This measurement method directly utilizes the connecting hole on the stator and the space between the stator and the rotor for measurement, without the need to disassemble the protective cover, which is beneficial to improving measurement efficiency. In addition, when the measuring module measures the size of the second gap, the measuring module can obtain stable support through the fixing mechanism to the housing and the abutment of the mounting base against the rotor, thereby effectively improving the accuracy of the measuring module in measuring the distance between the stator and the rotor, and also beneficial to improving detection efficiency.

[0045] The gap measuring tool of this application embodiment can measure the distance between the stator and the rotor. Specifically, it can measure the distance between the stator and the rotor of an exciter, the distance between the stator and the rotor of a motor, and of course, it can also measure the distance between the stator and the rotor of other equipment.

[0046] Combination Figures 1-11 As shown, the following explanation will take the distance measurement between the stator 200 and the rotor 300 of the exciter as an example.

[0047] See Figures 1-6 As shown, in some embodiments, the gap measuring tool 100 is used to measure the distance between the stator 200 and the rotor 300. The gap measuring tool 100 includes a fixing mechanism 10, a through-hole member 20, a flipping mechanism 30, and a measuring mechanism 40. The fixing mechanism 10 is used to fix the device to the housing 210 of the stator 200. The through-hole member 20 includes a rod 21 and a mounting base 22. One end of the rod 21 is rotatably connected to the fixing mechanism 10 so that the rod 21 can rotate about its own axis. The other end of the rod 21 is connected to the mounting base 22, which is used to abut against the rotor 300. The flipping mechanism 30 includes... The measuring mechanism 40 includes a flipping component 31 and a flipping drive component 32. One side of the flipping component 31 is rotatably connected to the mounting base 22. The flipping drive component 32 is connected to the flipping component 31 and is used to drive the flipping component 31 to flip so that the flipping component 31 can be folded or unfolded relative to the rod 21. The measuring mechanism 40 includes a measuring module 41, which is connected to the other side of the flipping component 31. When the flipping component 31 is in the unfolded state, the measuring module 41 can rotate with the rod 21 to extend between the stator 200 and the rotor 300, thereby measuring the distance between the stator 200 and the rotor 300.

[0048] The gap measuring tool 100 can refer to a component used to measure the distance between the stator 200 and the rotor 300.

[0049] The stator 200 includes a housing 210 and multiple magnetic poles 220. The housing 210 is a hollow cylindrical structure. The rotor 300 is a cylindrical structure located inside the housing 210. The multiple magnetic poles 220 are located between the rotor 300 and the housing 210, and are spaced apart along the axial direction of the rotor 300. The rotor 300 rotates and interacts magnetically with the magnetic poles 220 to generate a magnetic field. The magnetic poles 220 extend along the axial direction of the rotor 300, and a first gap 2101 is formed between two adjacent magnetic poles 220. The first gap 2101 extends through the stator 200 along the axial direction of the rotor 300. The gap between the magnetic poles 220 and the outer peripheral surface of the rotor 300 is the second gap 301. The size of the second gap 301 is the distance between the magnetic poles 220 of the stator 200 and the rotor 300, i.e., the distance between the stator 200 and the rotor 300. The gap measuring tool 100 of this embodiment is used to measure the size of the second gap 301.

[0050] The fixing mechanism 10 can refer to a component used to fix the gap measuring tool 100 to the housing 210 and provide support force. By using the fixing mechanism 10 to stably fix the entire gap measuring tool 100 to the housing 210 of the stator 200, the movement or shaking of the gap measuring tool 100 during the measurement process can be reduced, thereby improving the accuracy of the measurement.

[0051] In some examples, the fixing mechanism 10 can be fixed inside the connecting hole 2102 or on the outer surface of the housing 210.

[0052] For example, the fixing mechanism 10 can be magnetically fixed to the housing 210, or it can be fixed to the connecting hole 2102 by tensioning.

[0053] The through-hole 20 can refer to a component used to pass through the connecting hole 2102 and the first gap 2101. The rod 21 can refer to the main body of the through-hole 20. The two ends of the rod 21 are respectively connected to the fixing mechanism 10 and the mounting base 22. The fixing mechanism 10 supports the rod 21 and, through the rod 21, supports the mounting base 22. The rod 21 can be a hollow rod, which facilitates the arrangement of other components and improves the overall structural compactness of the tool.

[0054] One end of the rod 21 is rotatably connected to the fixing mechanism 10. The rod 21 can rotate relative to the fixing mechanism 10 around its own axis, thereby driving the flipping part 31 and the measuring module 41 to rotate, so as to reduce the risk of interference between the flipping part 31 and the magnetic pole 220 during the unfolding process, and can also rotate the measuring module 41 into the second gap 301.

[0055] As an example, the fixing mechanism 10 has a through hole, and the rod 21 passes through the through hole with a clearance fit between the through hole and the rod 21, thereby allowing the rod 21 to rotate relative to the fixing mechanism 10. Of course, in other examples, the fixing mechanism 10 and the rod 21 can also be connected by other rotational connection methods.

[0056] Mounting base 22 can refer to a component connected to rod 21 and capable of providing support force to the flipping component 31. Mounting base 22 provides a support point for the rotatable connection of the flipping component 31. Mounting base 22 is connected to the end of rod 21 facing away from fixing mechanism 10. Rod 21 passes through the connecting hole 2102 and through the first gap 2101 until mounting base 22 abuts against rotor 300. At this time, mounting base 22, as well as the flipping component 31 and measuring mechanism 40 connected to mounting base 22, are located at the second gap 301, thereby facilitating subsequent measurement by measuring mechanism 40.

[0057] In some examples, the mounting base 22 and the rod 21 can be an integral structure, for example, the mounting base 22 and the rod 21 are integrally injection molded.

[0058] In some examples, the mounting base 22 and the rod 21 can be molded separately and then assembled together. For example, the mounting base 22 and the rod 21 can be connected by screwing, snap-fitting, or gluing.

[0059] For example, one end of the mounting base 22 can be inserted into the rod body 21 for fixation, and the flipping component 31 is rotatably connected to the end exposed on the rod body 21 to facilitate the installation of the flipping component 31.

[0060] The flipping mechanism 30 can refer to the component used to drive the measuring module 41 to flip. The flipping part 31 can refer to the core component in the flipping mechanism 30. One side of the flipping part 31 is rotatably connected to the mounting base 22, and the other side of the flipping part 31 is connected to the measuring module 41. The flipping part 31 flips relative to the mounting base 22, so that the flipping part 31 can be folded and unfolded relative to the mounting base 22. At the same time, it also drives the measuring module 41 to fold and unfold relative to the mounting base 22.

[0061] For example, when the flipper 31 is in the folded state, the flipper 31 and the measuring module 41 are folded together on the side of the mounting base 22. When the flipper 31 is in the unfolded state, the flipper 31 and the measuring module 41 are arranged vertically relative to the mounting base 22.

[0062] Before the mounting base 22 is inserted into the connecting hole 2102, the flipping component 31 is in a folded state. The measuring module 41 is close to the mounting base 22 and has a small size, which facilitates its passage through the connecting hole 2102 and the first gap 2101, reducing the risk of interference between the measuring module 41 and the magnetic pole 220. After the mounting base 22 passes through the connecting hole 2102 and the first gap 2101, the mounting base 22 abuts against the rotor 300, and the flipping component 31 unfolds, allowing the measuring module 41 to extend into the second gap 301 for measurement.

[0063] The flipping drive 32 can refer to the power component or operating component in the flipping mechanism 30. By operating or starting the flipping drive 32, the flipping component 31 can be rotated, allowing the flipping component 31 to switch back and forth between the folded state and the unfolded state.

[0064] In some examples, the flip drive 32 may be, but is not limited to, components such as a motor or cylinder.

[0065] The measuring mechanism 40 can refer to a component used for measuring distance; the measuring module 41 can refer to a component connected to the flipping member 31 and capable of extending into the second gap 301. The measuring module 41 extends into the second gap 301 and is capable of obtaining the size of the second gap 301.

[0066] In some examples, the measurement module 41 is a distance measurement sensor, such as a laser rangefinder or a capacitive rangefinder.

[0067] In this embodiment of the gap measuring tool 100, before the mounting base 22 is inserted into the connecting hole 2102, the flipping member 31 is in a folded state. The mounting base 22 and the rod 21 are inserted through the connecting hole 2102 between two adjacent magnetic poles 220 of the stator 200 (i.e., the first gap 2101) until the mounting base 22 abuts against the rotor 300. Then, the fixing mechanism 10 is fixed to the housing 210 of the stator 200. The flipping drive member 32 drives the flipping member 31 to rotate, the flipping member 31 unfolds, and then the rod 21 is rotated, so that the measuring module 41 enters the space between the stator 200 and the rotor 300 (i.e., the second gap 301) to perform measurement, thereby obtaining the distance between the stator 200 and the rotor 300. This completes the measurement of the distance between the stator 200 and the rotor 300. The distance between the stator 200 and the rotor 300 is measured. In this process, the gap measuring tool 100 of this application embodiment directly uses the connecting hole 2102 of the housing 210, the space between two adjacent magnetic poles 220 and the space between the stator 200 and the rotor 300 for measurement, which can save the operation of disassembling and assembling the protective cover and improve the measurement efficiency. In addition, when the measuring module 41 measures the size of the second gap 301, the measuring module 41 can be stably supported by the fixing mechanism 10 to the housing 210 and the abutment of the mounting base 22 to the rotor 300, thereby effectively improving the accuracy of the measuring module 41 in measuring the distance between the stator 200 and the rotor 300, and also helping to improve the detection efficiency.

[0068] It is understood that before unfolding the flipping component 31, the rod 21 can be rotated so that the measuring module 41 and the flipping component 31 are rotated to the side of the mounting base 22 along the axial direction of the rotor 300, and then the flipping component 31 is unfolded. This reduces the risk of interference between the measuring module 41 and the flipping component 31 and the magnetic pole 220, and reduces damage to the magnetic pole 220.

[0069] The gap measuring tool 100 can be directly mounted on the exciter via the fixing mechanism 10. The gap measuring tool 100 adopts a flip-up and foldable structure, facilitating its carrying and storage. The gap measuring tool 100 enables a convenient, fast, and efficient method for detecting the magnetic gap of the exciter with small errors.

[0070] In some embodiments, see Figure 5 and Figure 6As shown, the measuring mechanism 40 includes a measuring sensor 42, and the measuring module 41 includes a measuring base 411 and a movable member 412. The measuring base 411 is connected to the flipping member 31, and the movable member 412 is movably connected to the measuring base 411. During the process of at least a portion of the movable member 412 extending between the stator 200 and the rotor 300 as the rod 21 rotates, the movable member 412 can abut against the surface of the magnetic pole 220 facing the rotor 300, thereby generating movement. The measuring sensor 42 is used to measure the movement of the movable member 412 to obtain the distance between the stator 200 and the rotor 300.

[0071] The measuring seat 411 can refer to the component connected to the flipping member 31 and providing support for the movable member 412. The measuring seat 411 is fixedly connected to the flipping member 31. After the measuring seat 411 is unfolded with the flipping member 31, it facilitates the movable member 412 to extend between the stator 200 and the rotor 300.

[0072] The movable component 412 can refer to the component movably connected to the measuring base 411. The movable component 412 can move relative to the measuring base 411. It can be understood that under the action of external force, the movable component 412 can move relative to the measuring base 411, and after the external force is removed, the movable component 412 can be fixed relative to the measuring base 411. This can also be called the initial state of the movable component 412. Before the movable component 412 extends between the magnetic pole 220 and the rotor 300, the movable component 412 is in the initial state. During the process of the movable component 412 extending into the second gap 301, the movable component 412 is subjected to the squeezing force of the magnetic pole 220 of the stator 200. The movable component 412 moves relative to the measuring base 411. By measuring the amount of movement of the movable component 412, the distance between the stator 200 and the rotor 300 can be calculated.

[0073] In some examples, the movable part 412 can be movably connected to the measuring seat 411 via an elastic or sliding structure such as a spring or slide rail.

[0074] The measuring sensor 42 can refer to a sensor used to measure the displacement of the moving part 412. The measuring sensor 42 can be a grating ruler, displacement encoder, strain gauge, etc., to monitor the displacement of the moving part 412 in real time.

[0075] By adopting the technical solution of this embodiment, the measuring sensor 42 measures the displacement of the moving part 412 before and after it extends into the second gap 301, thereby obtaining the distance between the stator 200 and the rotor 300. The measurement operation is simple and the measurement accuracy is good.

[0076] In some embodiments, see Figures 7-10As shown, the measuring module 41 also includes a first elastic element 413, and the movable element 412 includes a rotating part 4121, a first support rod part 4122, and a first abutting part 4123 for extending between the stator 200 and the rotor 300. The rotating part 4121 is rotatably connected to the measuring seat 411. The two ends of the first support rod part 4122 are respectively connected to the rotating part 4121 and the first abutting part 4123. The first elastic element 413 connects the movable element 412 and the measuring seat 411. The measuring seat 411 has a second abutting part 4111. When the first abutting part 4123 extends between the stator 200 and the rotor 300, the first abutting part 4123 can abut against the magnetic pole 220 under the elastic action of the first elastic element 413, and the second abutting part 4111 abuts against the rotor 300.

[0077] The first support rod 4122 is a rod-shaped structure. One end of the first support rod 4122 is connected to the rotating part 4121. The protruding structure at the other end of the first support rod 4122 forms the first abutting part 4123. The rotating part 4121 can be rotatably connected to the measuring base 411 by means of a pin, bearing or the like.

[0078] The second abutment 4111 can refer to the protrusion structure of the measuring base 411 facing away from the first abutment 4123. The first abutment 4123 and the second abutment 4111 are located on opposite sides of the measuring module 41.

[0079] The first elastic element 413 can refer to the elastic component in the measuring module 41. One end of the first elastic element 413 is connected to the movable component 412 (e.g., the rotating part 4121 or the first support rod part 4122, etc.), and the other end of the first elastic element 413 is fixed to the measuring seat 411, forming an elastic constraint. The first elastic element 413 can be a helical spring, a leaf spring, a torsion spring, etc.

[0080] Before the measuring module 41 enters the second gap 301, the elastic force of the first elastic member 413 acts on the movable member 412, making the thickness of the measuring module 41 at the first abutment portion 4123 and the second abutment portion 4111 greater than the second gap 301. Thus, during the process of the first abutment portion 4123 and the second abutment portion 4111 entering the second gap 301, the magnetic pole 220 of the stator 200 will squeeze the first abutment portion 4123 towards the second abutment portion 4111 to adapt to the second gap 301. The movement of the first abutment portion 4123 will drive the first support rod portion 4122 to rotate. In this way, the measuring sensor 42 can calculate the size of the second gap 301 based on the amount of movement of the first abutment portion 4123 or the amount of rotation of the first support rod portion 4122.

[0081] By adopting the technical solution of this embodiment, the first abutting part 4123 and the second abutting part 4111 directly abut against the magnetic pole 220 of the rotor 300 and the stator 200 respectively, which can accurately reflect the distance between the rotor 300 and the stator 200, which is beneficial to improving the accuracy of measurement; under the elastic action of the first elastic member 413, the first abutting part 4123 can also stably abut against the magnetic pole 220, reducing measurement error and improving the accuracy of measurement; after the measurement is completed, the first elastic member 413 can also drive the first abutting part 4123 to reset, thereby facilitating the next measurement.

[0082] In some embodiments, see Figure 9 As shown, at least one of the first contact portion 4123 and the second contact portion 4111 is a hemispherical portion.

[0083] The surface of the first contact portion 4123 is hemispherical, and the surface of the magnetic pole 220 is arc-shaped. The surface of the second contact portion 4111 is also hemispherical, and the outer circumferential surface of the rotor 300 is cylindrical. The hemispherical surface and the arc-shaped or cylindrical surface are in point contact, which helps to reduce scratch damage between the rotor 300 and the stator 200. In addition, the hemispherical surface has good roundness and diameter stability, maintaining consistent dimensional and shape accuracy in all directions, and the spherical surface is easy to process and inspect. In the measurement of the second gap 301, the hemispherical surface has consistent measurement accuracy in multiple directions, enabling precise measurement of the distance of the second gap 301 in any direction, improving the accuracy of the second gap 301 measurement. The hemispherical portion also has good rigidity and wear resistance, maintaining high accuracy and stability during long-term use.

[0084] By adopting the technical solution of this embodiment, it is beneficial to protect the rotor 300 and / or the stator 200, and also to improve the measurement accuracy.

[0085] In some embodiments, see Figure 8 and Figure 9 As shown, the first elastic element 413 includes a torsion spring, and the measuring mechanism 40 also includes a rotating shaft 414. The rotating shaft 414 passes through the rotating part 4121 and the measuring seat 411. The rotating shaft 414 passes through the torsion spring, and the two ends of the torsion spring abut against the movable part 412 and the measuring seat 411, respectively.

[0086] The rotating part 4121 is provided with a first rotating hole 41201, and the measuring seat 411 is provided with a second rotating hole 41103. The rotating shaft 414 passes through the first rotating hole 41201 and the second rotating hole 41103. The first support rod part 4122 is perpendicular to the rotating shaft 414, so that the movable part 412 is rotatably connected to the measuring seat 411. The rotating shaft 414 passes through the inner hole of the torsion spring. The two ends of the torsion spring abut against the first support rod part 4122 and the measuring seat 411, respectively. During the process of the first abutting part 4123 and the second abutting part 4111 entering the second gap 301, the first abutting part 4123 moves toward the second abutting part 4111, thereby compressing the torsion spring. At the same time, the elastic reaction force of the torsion spring also makes the first abutting part 4123 always abut against the magnetic pole 220.

[0087] In some examples, torsion springs and lubrication bushings 415 are provided on both sides of the rotating part 4121, which can realize the axial positioning of the moving part 412 and reduce the risk of the moving part 412 being misaligned; under the elastic force of the torsion spring, the first abutting part 4123 and the second abutting part 4111 can stably abut against the stator 200 and the rotor 300 respectively, improving the accuracy of measurement.

[0088] By adopting the technical solution of this embodiment, it is easy to realize the movable connection between the movable part 412 and the measuring seat 411.

[0089] In some embodiments, see Figures 6-10 As shown, the movable part 412 includes a second support rod 4124 and a third abutment part 4125. The two ends of the second support rod 4124 are connected to the rotating part 4121 and the third abutment part 4125 respectively. The second support rod 4124 intersects with the first support rod 4122. The measuring mechanism 40 includes a transmission assembly 43 and an inner rod 44. The rod body 21 is movably sleeved on the inner rod 44. The transmission assembly 43 connects the third abutment part 4125 and the inner rod 44. The transmission assembly 43 is used to convert the movement of the third abutment part 4125 into the movement of the inner rod 44 along its own axial direction. The measuring sensor 42 is connected to the end of the rod body 21 facing away from the mounting base 22. The measuring sensor 42 is used to detect the movement of the inner rod 44 along its own axial direction.

[0090] The second support rod 4124 is a straight rod structure. One end of the second support rod 4124 is connected to the rotating part 4121 and intersects with the first support rod 4122. The first support rod 4122 and the second support rod 4124 can form an acute angle, an obtuse angle, or a right angle. For example, the first support rod 4122 and the second support rod 4124 can form an L-shaped structure. The first support rod 4122 and the second support rod 4124 are perpendicular to each other. This makes the structure of the movable part 412 regular and facilitates the calculation of the size of the second gap 301. The protrusion structure provided at the other end of the second support rod 4124 forms a third abutment part 4125. The third abutment part 4125 is provided facing the flipping part 31 to facilitate connection with the transmission assembly 43.

[0091] In some examples, the measuring base 411 includes a first plate portion 4112, a second plate portion 4113, a connecting portion 4114, and a blocking portion 4115. The first plate portion 4112 and the second plate portion 4113 are spaced apart. The connecting portion 4114 is connected between the first plate portion 4112 and the second plate portion 4113 and is connected to the flipping member 31. The blocking portion 4115 is connected to the first plate body and the second plate body and is disposed away from the flipping member 31. The torsion spring and the rotating portion 4121 are located between the first plate portion 4112 and the second plate portion 4113. Both the first plate portion 4112 and the second plate portion 4113 are provided with a second rotating hole 41103. The rotating shaft 414 passes through the second rotating hole 41103 of the first plate portion 4112, the inner hole of the torsion spring, the first rotating hole 41201, and the second rotating hole 4115 in sequence. Inside the second rotating hole 41103 of the second plate portion 4113, the bottom of the first plate portion 4112 and the bottom of the second plate portion 4113 are provided with a second abutting portion 4111. One end of the torsion spring abuts against the second support rod portion 4124, and the other end of the torsion spring abuts against the first plate portion 4112. The blocking portion 4115 is located on the upper side of the first support rod portion 4122. The first support rod portion 4122 is blocked by the blocking portion 4115 and the upward flipping force of the torsion spring, thereby limiting the first support rod portion 4122 to the initial position. The blocking portion 4115 is provided with a clearance hole 41104. The clearance hole 41104 is used to avoid the first abutting portion 4123. The first abutting portion 4123 protrudes from the clearance hole 41104 to facilitate the first abutting portion 4123 to abut against the magnetic pole 220. During the process of the measuring module 41 entering the second gap 301, the second abutting part 4111 abuts against the rotor 300, and the magnetic pole 220 squeezes the first abutting part 4123 protruding from the clearance hole 41104. The first abutting part 4123 moves toward the second abutting part 4111, thereby driving the first support rod part 4122 and the second support rod part 4124 to rotate.

[0092] The transmission assembly 43 can refer to a component used to convert the movement of the third abutment 4125 into the movement of the inner rod 44 along its own axis. The transmission assembly 43 can adopt a multi-rod structure or other structures.

[0093] The inner rod 44 can refer to a rod located inside the rod body 21. The rod body 21 is hollow, and the inner rod 44 is located within the hollow cavity of the rod body 21. The axis of the inner rod 44 is parallel to the axis of the rod body 21, or the inner rod 44 and the rod body 21 are coaxially arranged, with a clearance fit between the inner rod 44 and the rod body 21, allowing the inner rod 44 to move along its own axial direction. The inner rod 44 being located inside the rod body 21 also makes full use of the space within the rod body 21, improving the structural compactness of the gap measuring tool 100, reducing the volume of the gap measuring tool 100, and facilitating the entry of the gap measuring tool 100 into the narrow first gap 2101.

[0094] The measuring sensor 42 is a displacement sensor, which detects the amount of movement of the inner rod 44. The measurement accuracy is good. The displacement sensor can be a resistive displacement sensor, an inductive displacement sensor, a capacitive displacement sensor, etc.

[0095] As an example, the measuring sensor 42 can be an LVDT (Linear Variable Differential Transformer) displacement sensor. An LVDT displacement sensor is a high-precision linear displacement sensor based on the principle of electromagnetic induction. It converts mechanical displacement (linear motion) into an electrical signal output. The LVDT displacement sensor includes a primary coil, two secondary coils, an iron core, a coil frame, and a housing. The iron core is connected to the inner rod 44. When the inner rod 44 moves, it causes the iron core to move. The moving iron core enters the magnetic field of the secondary coil, generating an induced electromotive force (EMF) in the secondary coil. Based on the Hall effect or other detection methods, the induced EMF can be converted into an electrical signal output. After processing by the circuit, the displacement of the inner rod 44 is obtained, thus determining the distance between the stator 200 and the rotor 300.

[0096] For example, the measurement sensor 42 can transmit data to a computer for processing via wireless communication or other means.

[0097] In some examples, the measuring sensor 42 may be mounted on the end of the rod 21 facing away from the mounting base 22 and located outside the housing 210 to facilitate data transmission of the measuring sensor 42; of course, in other examples, the measuring sensor 42 may also be mounted at other locations on the gap measuring tool 100.

[0098] During the process of the first abutment part 4123 entering the second gap 301, the magnetic pole 220 pushes the first abutment part 4123 to move. The first abutment part 4123 drives the first support rod part 4122 to rotate. The first support rod part 4122 drives the second support rod part 4124 to rotate. The rotation of the second support rod part 4124 drives the third abutment part 4125 to move. The movement of the third abutment part 4125 is transmitted to the inner rod 44 through the transmission assembly 43. The inner rod 44 moves along its own axial direction. The measuring sensor 42 measures the amount of movement of the inner rod 44, thereby obtaining the distance between the stator 200 and the rotor 300.

[0099] By adopting the technical solution of this embodiment, the movement of the third abutment 4125 is transmitted through the power transmission of the transmission assembly 43 and the inner rod 44, so that the measuring sensor 42 located at the end of the rod body 21 facing away from the mounting base 22 can measure the amount of movement of the third abutment 4125, thereby completing the distance measurement between the stator 200 and the rotor 300. The inner rod 44 is located inside the rod body 21, which can also make full use of the space inside the rod body 21, improve the structural compactness of the gap measuring tool 100, reduce the volume of the gap measuring tool 100, and facilitate the gap measuring tool 100 to pass through the narrow connecting hole 2102 and the first gap 2101 to realize the distance measurement. The measuring sensor 42 is installed at the end of the rod body 21 facing away from the mounting base 22, which facilitates the measuring sensor 42 to be located outside the housing 210, reduces the risk of interference between the measuring sensor 42 and the magnetic pole 220 due to the measuring sensor 42 entering the narrow connecting hole 2102 and the first gap 2101, reduces the damage to the measuring sensor 42 and the measurement error, and improves the accuracy of the measurement.

[0100] In some embodiments, see Figure 6 As shown, the transmission assembly 43 includes a first transmission rod 431, a second transmission rod 432, and a rotating angle 433. The first transmission rod 431 is movably connected to the flipping member 31 and can move along its own axial direction. The second transmission rod 432 is movably connected to the mounting base 22 and can move along its own axial direction. The rotating angle 433 is rotatably connected to the mounting base 22 and is located between the inner rod 44 and the second transmission rod 432. When the flipping member 31 is in the unfolded state... The first transmission rod 431 and the second transmission rod 432 are coaxial. The second transmission rod 432 intersects with the inner rod 44. The first transmission rod 431 abuts between the third abutment part 4125 and the second transmission rod 432. The second transmission rod 432 abuts between the first transmission rod 431 and one side of the corner 433. The inner rod 44 abuts against the other side of the corner 433, so that when the second transmission rod 432 moves along its own axial direction, it can drive the corner 433 to rotate, thereby driving the inner rod 44 to move along its own axial direction.

[0101] In some examples, the flipping member 31 is provided with a first transmission hole 3101, and the first transmission rod 431 passes through the first transmission hole 3101. The first transmission rod 431 and the first transmission hole 3101 are clearance-fitted, so that the first transmission rod 431 can move along its own axial direction. Of course, in other examples, there may be other movable connection methods between the first transmission rod 431 and the flipping member 31.

[0102] In some examples, the mounting base 22 is provided with a second transmission hole 2201 and a third transmission hole 2202, which are arranged vertically. A second transmission rod 432 passes through the second transmission hole 2201 and is clearance-fitted with the second transmission hole 2201, allowing the second transmission rod 432 to move along its own axial direction. The end of the inner rod 44 passes through the third transmission hole 2202 and is clearance-fitted with the third transmission hole 2202, allowing the inner rod 44 to move along its own axial direction. A corner 433 is located at the intersection of the second transmission hole 2201 and the third transmission hole 2202. The second transmission rod 432 and the inner rod 44 are located on both sides of the corner 433 along the rotation direction.

[0103] With the flipper 31 in the unfolded state, both ends of the first transmission rod 431 abut against the third abutment part 4125 and one end of the second transmission rod 432, respectively. The other end of the second transmission rod 432 abuts against one side of the corner 433, and the end of the inner rod 44 abuts against the other side of the corner 433. The first transmission rod 431 and the second transmission rod 432 are coaxially arranged. The movement of the third abutment part 4125 pushes the axial movement of the first transmission rod 431, which in turn pushes the axial movement of the second transmission rod 432. The axial movement of the second transmission rod 432 pushes the corner 433 to rotate, thereby pushing the inner rod 44 to move axially. The shape of the corner 433 can be various, such as fan-shaped or rectangular.

[0104] In some examples, the third abutment portion 4125 is a hemispherical portion, and the end face of the first transmission rod 431 away from the third abutment portion 4125 is a hemispherical surface, which can reduce frictional loss and reduce the decrease in accuracy caused by wear.

[0105] By adopting the technical solution of this embodiment, the first transmission rod 431 and the second transmission rod 432 are coaxially arranged, and the axial movement direction of the first transmission rod 431 is the same as that of the second transmission rod 432, which is beneficial to improve the accuracy of movement transmission and measurement accuracy. By rotating the corner 433, the axial movement of the second transmission rod 432 is transformed into the axial movement of the inner rod 44 that intersects with it. The transmission path is compact and simple, which is also beneficial to reduce the volume of the gap measuring tool 100.

[0106] In some embodiments, see Figure 6As shown, the measuring mechanism 40 also includes a threaded fastener. The measuring seat 411 has a connecting hole 41101 and a threaded hole 41102. The threaded hole 41102 penetrates the wall of the connecting hole 41101 radially. The flipping member 31 includes a base portion 311, a fixing portion 312, and a stepped surface 3102 formed between the base portion 311 and the fixing portion 312. One side of the base portion 311 is rotatably connected to the mounting seat 22, and the fixing portion 312 is connected to the other side of the base portion 311. The fixing portion 312 is located inside the connecting hole 41101, and the stepped surface 3102 abuts against the side of the measuring seat 411. The outer peripheral surface of the fixing portion 312 is provided with a tapered hole 3103. The threaded fastener is screwed into the threaded hole 41102 and abuts against the wall of the tapered hole 3103. When the flipping member 31 is in the unfolded state, the center line of the tapered hole 3103 is inclined toward the base portion 311.

[0107] The screw fastener can be a screw, bolt, etc. The base portion 311 can refer to the main body of the flipping member 31, and the fixing portion 312 can refer to the part of the flipping member 31 used to be received in the connecting hole 41101. The side of the base portion 311 near the fixing portion 312 and the fixing portion 312 form a stepped structure, thereby forming a stepped surface 3102. After the fixing portion 312 is inserted into the connecting hole 41101, the side of the measuring seat 411 facing the mounting seat 22 abuts against the stepped surface 3102, thereby achieving axial positioning of the fixing portion 312 and the measuring seat 411. After the screw fastener passes through the threaded hole 41102 and is screwed into the threaded hole 41102, the end of the threaded fastener extends into the tapered hole 3103 and abuts against the hole wall of the tapered hole 3103, so that the flipping member 31 is fixedly connected to the measuring seat 411. For example, the connecting hole 41101 and the threaded hole 41102 are provided in the connecting portion 4114.

[0108] When the flipper 31 is in the unfolded state, the center line of the tapered hole 3103 is inclined toward the mounting base 22. It can be understood that the center line of the tapered hole 3103 is set at an angle to the center line of the threaded hole 41102.

[0109] By adopting the technical solution of this embodiment, when the flipping part 31 is in the unfolded state, the center line of the tapered hole 3103 is inclined toward the base part 311, so that after the threaded fastener is tightened and fixed in the threaded hole 41102 and the tapered hole 3103, a clamping force will be given to the flipping part 31 toward the measuring seat 411, which is beneficial to improve the connection reliability between the flipping part 31 and the measuring seat 411.

[0110] In some embodiments, see Figure 3 , Figure 6 , Figure 7 and Figure 11As shown, the flipping drive component 32 includes a movable sleeve 321 and a connecting rod 322. The movable sleeve 321 is movably sleeved outside the rod body 21, and the two ends of the connecting rod 322 are rotatably connected to the movable sleeve 321 and the flipping component 31, respectively.

[0111] The movable sleeve 321 is a hollow sleeve structure, fitted around the rod 21, and can slide axially along the rod 21. The connecting rod 322 can be a rigid rod-like structure, with its two ends connected to the movable sleeve 321 and the flipping component 31 respectively via revolute joints (such as pins, spherical bearings, etc.). The connecting rod 322, the flipping component 31, and the movable sleeve 321 form a crank-slider mechanism, converting the axial movement of the movable sleeve 321 into a flipping motion, thereby realizing the folding and unfolding of the flipping component 31.

[0112] In some examples, the movable sleeve 321 includes a movable body 3211 and a movable joint 3212. The movable body 3211 is sleeved on the outside of the rod 21, and the movable joint 3212 is sleeved on the outside of the mounting base 22. The movable sleeve 321 and the movable joint 3212 are fixedly connected by means of threads, pins, welding, etc. The movable sleeve 321 adopts a two-section structure of movable body 3211 and movable joint 3212, which can facilitate the assembly of components.

[0113] In some examples, there may be two connecting rods 322. The flipping member 31 is similar to a "large" shaped structure. The base part 311 includes two rotating plate parts 3111 and a column part 3112. The two rotating plate parts 3111 are spaced apart and connected to one end of the column part 3112. The mounting seat 22 is located between the two rotating plate parts 3111 and is rotatably connected to the rotating plate parts 3111. The column part 3112 is located between the two connecting rods 322 and is rotatably connected to the connecting rods 322. The end of the column part 3112 facing away from the rotating plate parts 3111 is connected to the fixing part 312 and forms a stepped shaft structure, thereby forming a stepped surface 3102. The first transmission hole 3101 passes through the column part 3112 and the fixing part 312.

[0114] In some examples, a limiting shaft 3221 is connected between the two links 322. When the flipping part 31 is in the folded state, the limiting shaft 3221 abuts against the movable joint 3212, reducing the risk of direct collision between the flipping part 31 and the movable joint 3212.

[0115] For example, a rubber sleeve may be fitted over the limiting shaft 3221 to reduce collision damage between the movable joint 3212 and the limiting shaft 3221.

[0116] By adopting the technical solution of this embodiment, the movable sleeve 321 is sleeved outside the rod 21. The movable sleeve 321 occupies little space in the radial direction of the rod 21, which is beneficial to reduce the size of the gap measuring tool 100. The axial movement of the movable sleeve 321 drives the flipping part 31 to flip. The axial movement of the movable sleeve 321 is not easy to interfere with the magnetic pole 220, which is beneficial to reduce the damage to the magnetic pole 220.

[0117] In some embodiments, see Figure 11 As shown, the flipping part 31 is provided with a relief groove 3104, which is used to avoid the movable sleeve 321 when the flipping part 31 is in the folded state.

[0118] Understandably, when the flipper 31 is in the folded state, the side of the movable sleeve 321 can be accommodated within the clearance groove 3104. For example, the clearance groove 3104 is provided on the column portion 3112, and the shape of the clearance groove 3104 is adapted to the shape of the movable sleeve 321, allowing the side of the movable sleeve 321 to be accommodated within the clearance groove 3104. The clearance groove 3104 is an arc-shaped groove.

[0119] By adopting the technical solution of this embodiment, the setting of the clearance groove 3104 allows the measuring module 41 to be closer to the movable sleeve 321 after the flipping part 31 is folded, making the size of the gap measuring tool 100 at the mounting base 22 smaller, which facilitates passing through the narrow connecting hole 2102 and the first gap 2101.

[0120] In some embodiments, see Figure 6 As shown, the outer circumferential surface of the rod 21 is provided with a limiting protrusion 211, and the movable sleeve 321 is provided with a limiting groove 32101 extending along its own axial direction. The limiting protrusion 211 is used to insert into the limiting groove 32101.

[0121] The limiting protrusion 211 can refer to a protruding structure that protrudes from the outer peripheral surface of the rod 21. As an example, a cylindrical pin is fixed to the outer peripheral surface of the rod 21, and the portion of the cylindrical pin protruding from the outer peripheral surface of the rod 21 forms the limiting protrusion 211. The limiting groove 32101 penetrates the side wall of the movable sleeve 321, and the length direction of the limiting groove 32101 is parallel to the axial direction of the movable sleeve 321.

[0122] By adopting the technical solution of this embodiment, when the movable sleeve 321 moves axially relative to the rod 21, the limiting protrusion 211 is located in the limiting groove 32101 and moves along the length direction of the limiting groove 32101. The limiting protrusion 211 is restricted by the groove walls at both ends of the limiting groove 32101, thereby restricting the axial formation of the movable sleeve 321, thereby controlling the rotation of the flipping member 31, reducing the damage to the rotor 300 and the impact on the measurement accuracy of the measurement module 41 caused by excessive flipping of the flipping member 31.

[0123] In some embodiments, see Figures 3-5 As shown, the flip drive 32 also includes an operating handle 323, which is connected to the end of the movable sleeve 321 facing away from the mounting base 22.

[0124] The operating handle 323 refers to the part of the gap measuring tool 100 that allows the operator to rotate the movable sleeve 321. The operating handle 323 is fixedly connected to the end of the movable sleeve 321 facing away from the mounting base 22, so that the operating handle 323 can be exposed outside the housing 210, facilitating the rotation of the movable sleeve 321. The operating handle 323 can be a ring structure, a straight rod structure, etc.

[0125] For example, the operating handle 323 is a straight rod structure, and the operating handle 323 and the movable sleeve 321 form a cross structure to facilitate the rotation of the movable sleeve 321.

[0126] By adopting the technical solution of this embodiment, the operator can rotate the movable sleeve 321 by holding the operating handle 323, so as to facilitate the rotation of the movable sleeve 321.

[0127] In some embodiments, see Figure 3 As shown, the fixing mechanism 10 includes a rotary guide sleeve 11, which is used to fix the housing 210. The rotary guide sleeve 11 is sleeved on the outside of the movable sleeve 321. The rotary guide sleeve 11 is provided with a guide hole 111 for the operating handle 323 to pass through. The guide hole 111 includes a first hole section 1111 and a second hole section 1112. The first hole section 1111 extends along the axial direction of the rotary guide sleeve 11, and the second hole section 1112 extends along the circumferential direction of the rotary guide sleeve 11. The second hole section 1112 communicates with the end of the first hole section 1111 facing the mounting base 22.

[0128] The rotary guide sleeve 11 can refer to a component used to guide the movement of the operating handle 323. The rotary guide sleeve 11 is sleeved on the outside of the movable sleeve 321 and is used for fixed connection with the housing 210. The side wall of the rotary guide sleeve 11 is provided with a guide hole 111. The guide hole 111 is divided into two sections. One section extends along the axial direction of the movable sleeve 321 to form a first hole section 1111, and the other section extends along the circumferential direction of the rotary guide sleeve 11 to form a second hole section 1112.

[0129] After the operating handle 323 passes through the guide hole 111, it is fixedly connected to the movable sleeve 321. When the operating handle 323 moves axially along the movable sleeve 321 in the first hole section 1111, it will drive the movable sleeve 321 to move axially, thereby realizing the flipping of the flipping part 31. In addition, the limiting protrusion 211 is restricted by the two opposite side walls of the limiting groove 32101, so that the movable sleeve 321 will not rotate relative to the rod body 21. When the operating handle 323 moves circumferentially along the movable sleeve 321 in the second hole section 1112, the operating handle 323 will drive the movable sleeve 321 and the rod body 21 to rotate together, thereby extending the measuring module 41 between the stator 200 and the rotor 300.

[0130] By adopting the technical solution of this embodiment, the operator can directly operate the operating handle 323 to realize the rotation of the rod 21 and the axial movement of the movable sleeve 321, making the measurement operation simpler; the guide hole 111 limits the operating range of the operating handle 323, which helps to reduce the risk of excessive axial movement and excessive rotation of the movable sleeve 321, and helps to reduce damage to the magnetic pole 220, as well as the accuracy of the measurement.

[0131] In some embodiments, see Figure 5 and Figure 7 As shown, the gap measuring tool 100 also includes a connecting ring 51 and a second elastic element 52. The fixing mechanism 10 includes a fixing seat 12, which is used to fix the housing 210. The connecting ring 51 is sleeved on the outside of the rod 21 and fixedly connected to the rod 21. The connecting ring 51 is located between the mounting seat 22 and the fixing seat 12. The second elastic element 52 is sleeved on the outside of the rod 21 and is located between the connecting ring 51 and the fixing seat 12. The second elastic element 52 is used to push the mounting seat 22 against the rotor 300.

[0132] The fixed base 12 can refer to the component that is fixedly connected to the housing 210. The fixed base 12 can be fixed in the communicating hole 2102 by means of tension or magnetic attraction. The rotating guide sleeve 11 is fixedly connected to the fixed base 12, so that the rotating guide sleeve 11 is fixedly connected to the housing 210.

[0133] In some examples, the mounting base 12 includes a tensioning sleeve and an inner sleeve. The tensioning sleeve has an axially extending elongated groove, and the inner sleeve is screwed into the tensioning sleeve. When fixed, the tensioning sleeve is inserted into the connecting hole 2102, and then the inner sleeve is tightened. The inner sleeve opens the elongated groove of the tensioning sleeve, and the outer peripheral surface of the tensioning sleeve abuts tightly against the inner wall of the connecting hole 2102, thereby fixing the gap measuring tool 100.

[0134] The connecting ring 51 can refer to a component that is sleeved on the outside of the connecting ring 51 and fixedly connected to the rod 21. As an example, the connecting ring 51 is sleeved on the outside of the movable sleeve 321, which has a relief groove 3104 extending along its axial direction. One end of the cylindrical pin is connected to the connecting ring 51, and the other end passes through the relief groove 3104 and is fixedly connected to the rod 21, so that the connecting ring 51 and the rod 21 are fixedly connected. There can be multiple cylindrical pins, which are arranged at intervals along the circumference of the rod 21 to improve the connection reliability.

[0135] The second elastic element 52 can refer to a component with elasticity. The second elastic element 52 is hollow inside and can be a cylindrical spring, wave spring, etc. The second elastic element 52 is sleeved on the outside of the movable sleeve 321 and sandwiched between the fixed base 12 and the connecting ring 51.

[0136] By adopting the technical solution of this embodiment, after the fixed seat 12 is fixed on the housing 210, the second elastic member 52 gives the connecting ring 51 a force that moves away from the fixed seat 12, so that the mounting seat 22 elastically abuts against the rotor 300, reducing damage to the rotor 300, and the abutment reliability between the mounting seat 22 and the rotor 300 is good, which is beneficial to improving the accuracy of measurement; in addition, through the compression of the second elastic member 52, the gap measuring tool 100 can meet the measurement requirements of different distances between the housing 210 and the rotor 300.

[0137] In some cases, due to differences in manufacturing batches and production schedules, the exciter may have significant errors in the diameter of the connecting hole 2102, as well as in the distance between the housing 210 and the rotor 300. The fixing seat 12, secured within the connecting hole 2102 by tensioning, can accommodate installation requirements with varying hole diameters. Furthermore, the design of the second elastic element 52 also adapts to different distances between the housing 210 and the rotor 300. The gap measuring tool 100 needs to be stable and capable of operating normally within connecting holes 2102 of different diameters. The length of the through-hole 20 in the gap measuring tool 100 can adaptively accommodate different distances between the housing 210 and the rotor 300, improving the accuracy and reliability of the measurement.

[0138] In some embodiments, see Figure 6 As shown, the end face of the mounting base 22 facing away from the rod body 21 is provided with a fourth abutment portion 221. The fourth abutment portion 221 can refer to the protrusion on the end face of the mounting base 22 facing away from the rod body 21. The fourth abutment portion 221 is a hemispherical part. The contact between the hemispherical part and the rotor 300 is a point contact, which helps to reduce the contact damage to the rotor 300.

[0139] The gap measuring tool 100 of this application embodiment can perform classified measurements according to different gap sizes, thereby improving measurement accuracy. When measuring, the gap measuring tool 100 can enter the vicinity of the second gap 301 of the exciter through the connecting hole 2102. By rotating the through-hole 20, the measuring module 41 is screwed into the second gap 301. The compression of the measuring module 41 provides feedback on the true size of the second gap 301. The gap measuring tool 100 can utilize the holes in the exciter itself, allowing for gap measurement without removing the foreign object shield.

[0140] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A gap measuring tool for measuring the distance between the stator and the rotor, characterized in that: The gap measuring tool includes: A fixing mechanism for fixing the housing of the stator; The through-feed component includes a rod and a mounting base. The rod is used to pass through the connecting hole of the housing and between two adjacent magnetic poles of the stator. One end of the rod is rotatably connected to the fixing mechanism so that the rod can rotate about its own axis. The other end of the rod is connected to the mounting base, which is used to abut against the rotor. A flipping mechanism includes a flipping component and a flipping drive component. One side of the flipping component is rotatably connected to the mounting base. The flipping drive component is connected to the flipping component and is used to drive the flipping component to flip so that the flipping component can be folded or unfolded relative to the rod. The measuring mechanism includes a measuring module connected to the other side of the flipping member; when the flipping member is in the unfolded state, the measuring module can rotate with the rod to extend between the stator and the rotor, thereby measuring the distance between the stator and the rotor; The measuring mechanism includes a measuring sensor, and the measuring module includes a measuring base and a movable component. The measuring base is connected to the flipping component, and the movable component is movably connected to the measuring base. During the process of at least a portion of the movable component extending between the stator and the rotor as the rod rotates, the movable component can abut against the surface of the magnetic pole facing the rotor, thereby generating movement. The measuring sensor is used to measure the movement of the movable component to obtain the distance between the stator and the rotor. The measuring module further includes a first elastic element. The movable element includes a rotating part, a first support rod part, and a first abutting part for extending between the stator and the rotor. The rotating part is rotatably connected to the measuring seat. The two ends of the first support rod part are respectively connected to the rotating part and the first abutting part. The first elastic element connects the movable element and the measuring seat. The measuring seat has a second abutting part. When the first abutting part extends between the stator and the rotor, the first abutting part can abut against the magnetic pole under the elastic action of the first elastic element, and the second abutting part abuts against the rotor.

2. The gap measuring tool according to claim 1, characterized in that: At least one of the first abutting portion and the second abutting portion is a hemispherical portion.

3. The gap measuring tool according to claim 1, characterized in that: The first elastic element includes a torsion spring, and the measuring mechanism further includes a rotating shaft, which passes through the rotating part and the measuring seat. The rotating shaft passes through the torsion spring, and the two ends of the torsion spring abut against the movable part and the measuring seat, respectively.

4. The gap measuring tool according to claim 1, characterized in that: The movable component includes a second support rod and a third abutment part. The two ends of the second support rod are respectively connected to the rotating part and the third abutment part, and the second support rod intersects with the first support rod. The measuring mechanism includes a transmission assembly and an inner rod. The rod body is movably sleeved outside the inner rod. The transmission assembly connects the third abutment part and the inner rod, and the transmission assembly is used to convert the movement of the third abutment part into the movement of the inner rod along its own axial direction. The measuring sensor is connected to the end of the rod body facing away from the mounting base, and the measuring sensor is used to detect the movement of the inner rod along its own axial direction.

5. The gap measuring tool according to claim 4, characterized in that: The transmission assembly includes a first transmission rod, a second transmission rod, and a rotating corner. The first transmission rod is movably connected to the flipping member and is capable of moving along its own axial direction. The second transmission rod is movably connected to the mounting base and is capable of moving along its own axial direction. The rotating angle is rotatably connected to the mounting base, and the rotating angle is located between the inner rod and the second transmission rod; When the flipping component is in the unfolded state, the first transmission rod and the second transmission rod are coaxial, the second transmission rod intersects with the inner rod, the first transmission rod abuts between the third abutting part and the second transmission rod, the second transmission rod abuts between the first transmission rod and one side of the corner, and the inner rod abuts against the other side of the corner, so that when the second transmission rod moves along its own axial direction, it can drive the corner to rotate, thereby driving the inner rod to move along its own axial direction.

6. The gap measuring tool according to claim 1, characterized in that: The measuring mechanism further includes a threaded fastener, and the measuring seat has a connecting hole and a threaded hole, the threaded hole penetrating the hole wall of the connecting hole radially along the connecting hole; The flipping component includes a base portion, a fixing portion, and a stepped surface formed between the base portion and the fixing portion. One side of the base portion is rotatably connected to the mounting base, and the fixing portion is connected to the other side of the base portion. The fixing portion is located inside the connecting hole, and the stepped surface abuts against the side of the measuring base. The outer peripheral surface of the fixing portion is provided with a tapered hole, and the threaded fastener is screwed into the threaded hole and abuts against the hole wall of the tapered hole. When the flipping component is in the unfolded state, the center line of the tapered hole is inclined toward the base portion.

7. The gap measuring tool according to any one of claims 1 to 6, characterized in that: The flipping drive component includes a movable sleeve and a connecting rod. The movable sleeve is movably sleeved outside the rod body, and the two ends of the connecting rod are rotatably connected to the movable sleeve and the flipping component, respectively.

8. The gap measuring tool according to claim 7, characterized in that: The flipping component is provided with a clearance groove, which is used to avoid the movable sleeve when the flipping component is in the folded state.

9. The gap measuring tool according to claim 7, characterized in that: The outer circumferential surface of the rod is provided with a limiting protrusion, and the movable sleeve is provided with a limiting groove extending along its own axis. The limiting protrusion is used to insert into the limiting groove.

10. The gap measuring tool according to claim 7, characterized in that: The flipping drive also includes an operating handle, which is connected to the end of the movable sleeve facing away from the mounting base.

11. The gap measuring tool according to claim 10, characterized in that: The fixing mechanism includes a rotary guide sleeve for fixed connection with the housing, and the rotary guide sleeve is sleeved over the movable sleeve; the rotary guide sleeve has a guide hole for the operating handle to pass through, the guide hole includes a first hole section and a second hole section, the first hole section extends along the axial direction of the rotary guide sleeve, the second hole section extends along the circumferential direction of the rotary guide sleeve, and the second hole section communicates with the end of the first hole section facing the mounting base.

12. The gap measuring tool according to any one of claims 1 to 6, characterized in that: The gap measuring tool further includes a connecting ring and a second elastic element. The fixing mechanism includes a fixing seat for fixing to the housing. The connecting ring is sleeved on the outside of the rod and fixedly connected to the rod. The connecting ring is located between the mounting seat and the fixing seat. The second elastic element is sleeved on the outside of the rod and is located between the connecting ring and the fixing seat. The second elastic element is used to push the mounting seat against the rotor.

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