Inspection device for rotary electric machine and inspection system for rotary electric machine

Abstract

The inspection device of the rotary electric machine of the present application can be extracted without detaching the rotor even in the case where the driving portion of the extension mechanism has failed while being inserted into the rotary electric machine. The device includes a base (12), a linear motion mechanism (13) that performs linear motion, a link mechanism (15) that is connected to the base via a driving link and performs extension motion by linear motion of the linear motion mechanism, a connection mechanism (14) that connects the driving link of the link mechanism to the linear motion mechanism, and a sensor (16). The connection mechanism has a link connection portion (14a) that is connected to the link mechanism and a ball nut (14c) that is linked to the linear motion of the linear motion mechanism, and if a force above a predetermined force is applied to the link mechanism, the link connection portion is separated from the ball nut in a direction in which the link mechanism is retracted.

Description

Technical Field

[0001] This application relates to an inspection device for rotating electrical machines and an inspection system for rotating electrical machines. Background Technology

[0002] Large rotating electrical machines used as generators have rotor wedges inserted into their rotors to hold the copper windings. Defects such as surface cracks in these rotor wedges can cause malfunctions in the rotating electrical machine. Generally, to inspect for defects in the rotor wedges, the rotor needs to be removed from the rotating electrical machine. However, removing the rotor from the machine for inspection presents several problems, including prolonged downtime of the rotating electrical machine and the potential for damage to the rotor or stator during disassembly and installation.

[0003] As a method to address these problems, the following approach is disclosed: With the rotor mounted to a rotating electric motor, an inspection device is inserted into the gap between the rotor and the stator, and the inspection device is operated remotely to inspect for defects in the rotor wedge. This inspection device includes a telescopic mechanism with an inspection sensor mounted at its front end. The inspection device is inserted into the rotating electric motor with the telescopic mechanism retracted. If the inspection device reaches the inspection position, the telescopic mechanism of the inspection device is extended to bring the inspection sensor into close contact with the rotor (e.g., see Patent Document 1).

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2017-138315 Summary of the Invention

[0007] The technical problem that the invention aims to solve

[0008] A rotor stop wheel is typically located at the end of the rotor. Generally, the outer diameter of the rotor stop wheel is set to be larger than the outer diameter of the rotor inside the rotor. Therefore, the gap between the rotor stop wheel at the end of the rotating motor and the stator is narrower than the gap between the rotor and the stator inside the rotating motor.

[0009] In existing inspection devices, if the drive unit of the telescopic mechanism malfunctions while the telescopic mechanism is extended after insertion into the rotary motor, the device stops while the telescopic mechanism is extended. Therefore, the inspection device cannot pass through the gap between the rotor stop wheel and the stator. Thus, to remove the inspection device without damaging the rotary motor and the inspection device itself, the rotor needs to be removed from the rotary motor.

[0010] This application was made to solve the above-mentioned problems. The inspection device of this application can be removed from the rotating motor without removing the rotor, even if the drive part of the telescopic mechanism fails while it is inserted into the rotating motor.

[0011] Technical means for solving technical problems

[0012] The inspection device of this application includes: a base; a linear motion mechanism mounted on the base and performing linear motion; a linkage mechanism having a driving link and a driven link, the driven link being connected to the base and extending or retracting in a direction intersecting the direction of linear motion through the linear motion of the linear motion mechanism; a connecting mechanism connecting the driving link of the linkage mechanism to the linear motion mechanism; and a sensor mounted on the linkage mechanism. The connecting mechanism has a link connecting portion connected to the driving link and a linkage portion connected to the link connecting portion and linked to the linear motion of the linear motion mechanism. If a force greater than a predetermined force is applied to the linkage mechanism, the connection between the link connecting portion and the linkage portion is released, and the link connecting portion separates from the linkage portion in the direction that causes the linkage mechanism to contract.

[0013] Invention Effects

[0014] The inspection device of this application includes a connecting mechanism in which, if a predetermined force or greater is applied to the linkage mechanism, the connection between the linkage connecting part and the linkage part is released, and the linkage connecting part separates from the linkage part in the direction that causes the linkage mechanism to retract. Therefore, the linkage mechanism can retract even if the linear motion mechanism cannot operate normally. As a result, even if the drive part of the telescopic mechanism of the inspection device malfunctions after the rotary motor is inserted, the inspection device can be removed without removing the rotor from the rotary motor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing a cross-section of the rotary electric motor in Embodiment 1.

[0016] Figure 2 This is a schematic diagram of the inspection device involved in Embodiment 1.

[0017] Figure 3 This is a schematic diagram illustrating the normal operation of the inspection device in Embodiment 1.

[0018] Figure 4 This is a schematic diagram illustrating the normal operation of the inspection device in Embodiment 1.

[0019] Figure 5 This is a schematic diagram illustrating the normal operation of the inspection device in Embodiment 1.

[0020] Figure 6 This is a schematic diagram illustrating the emergency operation of the inspection device in Embodiment 1.

[0021] Figure 7This is a schematic diagram illustrating the emergency operation of the inspection device in Embodiment 1.

[0022] Figure 8 This is a schematic diagram illustrating the emergency operation of the inspection device in Embodiment 1.

[0023] Figure 9 This is a schematic diagram showing the structure of the linkage mechanism in Embodiment 1.

[0024] Figure 10 This is a schematic diagram of the inspection device involved in Embodiment 2.

[0025] Figure 11 This is a schematic diagram of the inspection device involved in Embodiment 3.

[0026] Figure 12 This is a schematic diagram illustrating the operation of the linkage mechanism in Embodiment 3.

[0027] Figure 13 This is a schematic diagram illustrating the operation of the linkage mechanism in Embodiment 3.

[0028] Figure 14 This is a schematic diagram of the linkage mechanism in embodiment 3.

[0029] Figure 15 This is a schematic diagram illustrating the operation of the linkage mechanism in Embodiment 3.

[0030] Figure 16 This is a schematic diagram illustrating the operation of the linkage mechanism in Embodiment 3.

[0031] Figure 17 This is a schematic diagram illustrating the operation of the linkage mechanism in Embodiment 3.

[0032] Figure 18 This is a schematic diagram of the inspection device involved in Embodiment 4.

[0033] Figure 19 This is a schematic diagram illustrating the normal operation of the inspection device in Embodiment 4.

[0034] Figure 20 This is a schematic diagram illustrating the normal operation of the inspection device in Embodiment 4.

[0035] Figure 21 This is a schematic diagram illustrating the normal operation of the inspection device in Embodiment 4.

[0036] Figure 22 This is a schematic diagram illustrating the emergency operation of the inspection device in Embodiment 4.

[0037] Figure 23 This is a schematic diagram illustrating the emergency operation of the inspection device in Embodiment 4.

[0038] Figure 24 This is a schematic diagram illustrating the emergency operation of the inspection device in Embodiment 4.

[0039] Figure 25 This is a schematic diagram illustrating the emergency operation of the inspection device in Embodiment 4.

[0040] Figure 26 This is a schematic diagram of the inspection device involved in Embodiment 5.

[0041] Figure 27 This is a schematic diagram of the inspection system involved in Implementation Method 6.

[0042] Figure 28 This is a schematic diagram illustrating the operation of the inspection system according to Embodiment 6.

[0043] Figure 29 This is a schematic diagram illustrating the operation of the inspection system according to Embodiment 6.

[0044] Figure 30 This is a schematic diagram illustrating the operation of the inspection system according to Embodiment 6. Detailed Implementation

[0045] The following is a detailed description of the inspection apparatus and inspection system for a rotary electric machine according to embodiments of this application, with reference to the accompanying drawings. Furthermore, the same reference numerals in the drawings indicate the same or equivalent parts.

[0046] Implementation method 1.

[0047] Figure 1 This is a schematic diagram showing a cross-section of a rotary motor that is the object of inspection by the inspection device according to Embodiment 1. Figure 1The rotary electric machine shown is, for example, a large rotary electric machine used as a generator. The rotary electric machine 1 consists of a stator 2 and a rotor 3. The stator 2 is cylindrical in shape. The rotor 3 is cylindrical in shape and is disposed inside the stator 2, rotatably positioned relative to the stator 2. The rotor 3 includes a rotor shaft 31, a rotor wedge 32, and a rotor stop wheel 33. The rotor wedge 32 is disposed on the surface of the rotor shaft 31 and functions to hold the windings of the rotor 3. The surface of the rotor wedge 32 is not entirely located at the same position as the surface of the rotor shaft 31; sometimes some surfaces of the rotor wedge 32 are located deeper into the inner diameter than the surface of the rotor shaft 31. The outer diameter of the rotor stop wheel 33 is set to be larger than the outer diameter of the rotor shaft 31. Therefore, the gap between the stator 2 and rotor 3 at the end of the rotary electric machine 1 is narrower than the gap between the stator 2 and rotor 3 inside the rotary electric machine 1. For example, the gap between the stator 2 and rotor 3 at the end where the rotor stop wheel 33 is disposed is approximately 2 cm. Using the insertion rod 22, the inspection device 11 of this embodiment is inserted into the gap between the stator 2 and the rotor 3. Furthermore, the inspection device 11 is fixed to the front end of the insertion rod 22.

[0048] Figure 2 This is a schematic diagram of the inspection device in this embodiment. The inspection device 11 consists of an elongated base 12, a linear motion mechanism 13, a connecting mechanism 14, a linkage mechanism 15, and an inspection sensor 16. The base 12 is, for example, a metal component, on which the linear motion mechanism 13, the linkage mechanism 15, etc., are mounted.

[0049] The linear motion mechanism 13 is, for example, a ball screw mechanism, consisting of a ball screw 13a, a motor 13b, and a bearing 13c. The ball screw 13a is connected to a connecting mechanism 14. In the linear motion mechanism 13, the motor 13b receives a signal from an external remote device 17 and rotates, causing the connecting mechanism 14 to move linearly via the ball screw 13a.

[0050] The connecting mechanism 14 consists of a link connecting part 14a, a magnet 14b, and a ball nut 14c. The ball nut 14c moves linearly by rotating the ball screw 13a of the linear motion mechanism 13. That is, the ball nut 14c is a linking part that is linked to the linear motion of the linear motion mechanism 13 in the connecting mechanism 14. The magnet 14b is fixed to the ball nut 14c. The link connecting part 14a is made of a metallic magnetic body and is connected to the ball nut 14c by the magnetic attraction of the magnet 14b. Alternatively, the link connecting part 14a may be constructed with a magnet different from the magnet 14b. The link connecting part 14a is not directly linked to the linear motion of the ball screw 13a of the linear motion mechanism 13, but is constrained to have a degree of freedom in the linear motion direction of the linear motion mechanism 13. That is, the link connecting part 14a is a separate part of the connecting mechanism 14 relative to the linear motion mechanism 13. For example, the link connection 14a is supported by a linear motion guide arranged parallel to the linear motion direction of the linear motion mechanism 13 (not shown). Alternatively, the link connection 14a has a through hole through which the ball screw 13a passes, and the link connection 14a is supported by the ball screw 13a in the through hole. Therefore, without the application of external force, the link connection 14a of the connecting mechanism 14 and the ball nut 14c are connected by the magnetic attraction of the magnet 14b. The connecting mechanism 14 moves integrally with the linear motion mechanism 13 in conjunction with its linear motion. Furthermore, since the link connection 14a and the ball nut 14c can be connected by magnetic attraction, the magnet 14b can be fixed to the link connection 14a. In this case, the ball nut 14c needs to be made of a magnetic material or have other magnets built into it.

[0051] The maximum connecting force resulting from the magnetic attraction between the link connection 14a and the ball nut 14c is set to be greater than the force applied to the force point of the link mechanism 15 to apply pressure to the inspection sensor 16 (described later), and less than the force applied to the force point of the link mechanism 15 to retract the link mechanism 15 during emergency action.

[0052] The linkage mechanism 15 consists of a first link 15a and a second link 15b. Both links 15a and 15b have connectors at both ends. One connector of the first link 15a is connected to the base 12. The other connector of the first link 15a is connected to a test sensor 16. One connector of the second link 15b is connected to a link connection 14a. The other connector of the second link 15b is rotatably connected to the first link 15a. In this linkage mechanism 15, the first link 15a is the driven link, and the second link 15b is the driving link.

[0053] like Figure 2As shown, the linkage 15 converts the left-right motion of the connecting mechanism 14 caused by the linear motion of the linear motion mechanism 13 into the up-down motion of the inspection sensor 16. The linkage 15 moves the inspection sensor 16 in a direction intersecting the linear motion direction of the linear motion mechanism 13; this action is referred to as the extension / retraction action of the linkage 15. Furthermore, the action of the linkage 15 moving the inspection sensor 16 away from the base 12 is called the extension action of the linkage 15, and the action of the linkage 15 moving the inspection sensor 16 towards the base 12 is called the retraction action of the linkage 15.

[0054] The stroke of the linear motion mechanism 13 needs to be set such that the linkage mechanism 15 can retract to its minimum. That is, the stroke of the linear motion mechanism 13 is set to a length greater than or equal to the sum of the distances between the pairs of the first link 15a and the distances between the pairs of the second link 15b. Furthermore, "pair" refers to the point in a linkage mechanism where two paired links retain relative degrees of freedom of motion and are engaged. Specifically, Figure 2 In this configuration, the counterpart of the first link 15a is the joint between the first link 15a and the base 12, and the joint between the first link 15a and the second link 15b. The counterpart of the second link 15b is the joint between the second link 15b and the link connection 14a, and the joint between the second link 15b and the first link 15a.

[0055] Next, the normal and emergency operations of the inspection device 11 will be explained in turn. Furthermore, for the sake of simplicity, the effect of gravity will not be mentioned in the following description.

[0056] First, the normal operation of the inspection device 11 will be explained. Figures 3 to 5 This is a schematic diagram illustrating the normal operation of the inspection device 11 in this embodiment. Figure 3 This is a schematic diagram showing the inspection device 11 being inserted into the rotary motor. (Example) Figure 3 As shown, when inserted into the rotary motor, in order to pass through the narrowest gap between the stator 2 and the rotor stop wheel 33, the inspection device 11 brings the linkage mechanism to its most retracted state. At this time, no external force is applied between the linkage connection 14a and the ball nut 14c of the connecting mechanism 14 in either the compression or separation direction. Therefore, the linkage connection 14a and the ball nut 14c are connected by the magnetic attraction of the magnet 14b. As a result, the linkage mechanism 15 and the linear motion mechanism 13 are connected by the connecting mechanism 14.

[0057] Figure 4 This is a schematic diagram of the inspection device 11 inspecting the rotor wedge 32. (See diagram below.) Figure 4As shown, when inspecting the rotary motor, the inspection device 11 extends the linkage mechanism 15 to press the inspection sensor 16 against the rotor wedge 32. At this time, an external force is applied in the separation direction between the linkage connection 14a and the ball nut 14c of the connecting mechanism 14. This external force is used to apply pressure to the inspection sensor 16 for inspection. As described above, since the magnetic attraction of the magnet 14b is greater than this external force, the linkage connection 14a and the ball nut 14c remain connected by the magnetic attraction of the magnet 14b.

[0058] Figure 5 This is a schematic diagram of the inspection device 11 moving to the next inspection position. (Example) Figure 5 As shown, the inspection device 11 retracts the linkage mechanism 15 to the intermediate position, allowing the inspection sensor 16 to move away from the rotor wedge 32. At this time, no external force is applied between the linkage connection 14a and the ball nut 14c of the connecting mechanism 14 in either the compression or separation direction. Therefore, the linkage connection 14a and the ball nut 14c are connected by the magnetic attraction of the magnet 14b. As a result, the linkage mechanism 15 and the linear motion mechanism 13 are connected by the connecting mechanism 14. The inspection device 11 is then moved to the next inspection position using the insertion rod 22.

[0059] Therefore, through repetition Figures 4 to 5 The actions shown enable the inspection device 11 to perform inspections of the rotary motor. When the inspection device 11 is in normal operation, the connecting rod connection 14a, magnet 14b, and ball nut 14c in the connecting mechanism 14 move as a unit.

[0060] Next, the emergency operation of the inspection device 11 will be explained. Figures 6 to 8 This is a schematic diagram illustrating the emergency operation of the inspection device 11 in this embodiment. The emergency operation is as follows: when the inspection device 11 is inspecting the rotor wedge 32, if an abnormality occurs in the inspection device, the inspection device 11 is removed from the rotating motor. Furthermore, an abnormality in the inspection device refers to the inability of the drive unit of the linkage mechanism 15, i.e., the linear motion mechanism 13, to operate normally, thus preventing control of the extension and retraction of the linkage mechanism 15. For example, sometimes the linear motion mechanism 13 may malfunction due to reasons such as a broken signal transmission path from the remote device 17 or a power outage to the linear motion mechanism 13. Assuming that in... Figure 5 The inspection device 11 malfunctioned in the state shown. Figure 5 In the state shown, if the inspection device 11 malfunctions, the linkage mechanism 15 is in the extended intermediate position. Furthermore, the linkage connection 14a of the connecting mechanism 14 and the ball nut 14c are connected by the magnetic attraction of the magnet 14b.

[0061] Figure 6 This is a schematic diagram showing the removal of the inspection device 11 using the insertion rod 22. (See diagram below.) Figure 6 As shown, if the inspection device 11 is moved in the removal direction, the linkage mechanism 15 of the inspection device 11 is in an extended state, and therefore contacts the rotor stop wheel 33. In this state, if the insertion rod 22 is used to further apply force to the inspection device 11 in the removal direction, a force acts on the linkage mechanism 15 in the opposite direction to the removal direction. This force acting on the linkage mechanism 15 is a force that causes the linkage mechanism 15 to retract. At this time, the force in the opposite direction to the removal direction acts on the linkage connection 14a via the linkage mechanism 15. If this force acting on the linkage connection 14a is greater than the magnetic attraction connecting the linkage connection 14a to the ball nut 14c, the linkage connection 14a separates from the ball nut 14c. In other words, the maximum connecting force between the connecting rod connection 14a and the ball nut 14c is a predetermined force. If a force greater than this predetermined force is applied to the linkage mechanism 15, the connection between the connecting rod connection 14a and the ball nut 14c is released. Since the connecting rod connection 14a has a degree of freedom in the linear motion direction, it separates from the ball nut 14c along the linear motion direction. Figure 7 The diagram shows the state after the connecting rod connection 14a separates from the ball nut 14c. The connecting rod connection 14a moves away from the ball nut 14c, causing the connecting rod mechanism 15 to retract. As a result, the position of the inspection sensor 16 decreases, and the connecting rod structure 15 retracts to a state where the inspection device 11 can pass through the gap between the rotor stop wheel 33 and the stator 2. Figure 8 The state of the inspection device 11 through the gap between the rotor stop wheel 33 and the stator 2 is shown. Thus, even if the inspection device 11 malfunctions, it can be removed from the rotating motor.

[0062] In addition, as an emergency action, it was explained that in Figure 5 The inspection device 11 malfunctioned under the conditions shown. Figure 4 In the event of an abnormality in the indicated state, if the inspection device 11 is moved in the removal direction using the insertion rod 22, the inspection sensor 16 comes into contact with the step of the rotor wedge 32. Even in this case, if the inspection device 11 is further forced in the removal direction using the insertion rod 22, the force also acts on the linkage mechanism 15 via the inspection sensor 16 in the opposite direction to the removal direction. Under this force, the linkage connection 14a separates from the ball nut 14c, and therefore, the linkage mechanism 15 retracts. As a result, the inspection device 11 can be removed from the rotary motor.

[0063] In this type of inspection device, when an overload is applied to the connecting mechanism, the connection between the connecting rod and the ball nut is released, and the connecting rod and the ball nut separate. Therefore, even if the drive unit for the extension and retraction of the linkage mechanism, i.e., the linear motion mechanism, malfunctions, the linkage mechanism will still retract. As a result, the inspection device can be removed without detaching the rotor from the rotating motor, and neither the rotating motor nor the inspection device is damaged.

[0064] Furthermore, overloads acting on the connecting mechanism can also occur due to various factors, including the reaction force from the linkage contacting the rotor stop wheel or the reaction force from the check sensor contacting the rotor wedge step. For example, excessive pressing force from the check sensor on the rotor wedge can also generate an overload on the connecting mechanism. In this case, the linkage connection separates from the ball nut, and the linkage moves in the contraction direction, thus reducing the pressing force of the check sensor. As a result, damage to the rotor wedge caused by excessive pressing force from the check sensor can also be prevented.

[0065] Furthermore, the magnetic attraction of the magnet generates the connecting force between the connecting rod and the ball nut. Therefore, even if the connection between the connecting rod and the ball nut inside the rotating motor is disengaged, and the connecting rod and the ball nut separate, the ball nut can be brought close to the separated connecting rod by a linear motion mechanism, and the magnetic attraction of the magnet can be used to reconnect the connecting rod and the ball nut.

[0066] Furthermore, linkage mechanisms are not limited to Figure 2 The configuration shown can also be other configurations. All paired actions other than the force point and fulcrum of the linkage mechanism are acceptable as long as the configuration has a component of movement in both the direction perpendicular to and the same direction as the direction in which the force is applied to the force point. Furthermore, a linkage mechanism with two force points is acceptable as long as the above conditions are satisfied, assuming one force point is considered a fulcrum and force is applied only to the other force point. Examples of linkage structures that satisfy the above conditions include: Figure 9 The linkage mechanism 15 shown. Figure 9 The diagram on the left shows a linkage mechanism 15 with a single point of force. Figure 9 The diagram on the right shows a linkage mechanism 15 with two force points. Any linkage mechanism that meets the above conditions can be used as the linkage mechanism of the inspection device, and linkage mechanisms obtained by combining multiple or even different linkage mechanisms can be used.

[0067] Furthermore, in this embodiment, a ball screw mechanism is used as the linear motion mechanism. However, other mechanisms, such as a linear motor, can also be used instead of the ball screw mechanism as the linear motion mechanism.

[0068] Furthermore, in this embodiment, the connecting rod connection is connected to the ball nut by the magnetic attraction of the magnet, but it is not limited to this. For example, the connection between the connecting rod connection and the ball nut can also be formed by using the engagement of an elastic deformation member. In this case, the maximum connection force of the engagement is set to be greater than the force applied to the force point of the connecting rod mechanism to apply pressure to the inspection sensor for inspection, and less than the force applied to the force point of the connecting rod mechanism to retract the connecting rod mechanism in an emergency action.

[0069] Implementation method 2.

[0070] Figure 10 This is a schematic diagram of the inspection device according to Embodiment 2. The inspection device 11 in this embodiment is the same as the inspection device in Embodiment 1, and a holding magnet 18 is provided on the base 12. The holding magnet 18 is positioned to contact the connecting mechanism 14 when the linkage mechanism 15 is in its most retracted state. Figure 10 The inspection device 11 of this embodiment is shown in its most retracted state. The retaining magnet 18 holds the connecting rod connection 14a of the connecting mechanism 14 by magnetic attraction. The magnetic attraction of the retaining magnet 18 is set to be weaker than the magnetic attraction of the magnet 14b acting between the connecting rod connection 14a and the ball nut 14c.

[0071] In this inspection device configuration, when the connection between the linkage 14a and the ball nut 14c is released during an emergency operation, the retaining magnet 18 can attract the linkage 14a through magnetic attraction, keeping the linkage mechanism 15 in its most retracted state. Therefore, unnecessary extension of the linkage mechanism 15 can be prevented during an emergency operation. As a result, unnecessary contact between the linkage mechanism 15 or the inspection sensor 16 and the rotor stop wheel 33 can be avoided when the inspection device 11 is removed.

[0072] Furthermore, the magnetic attraction force acting between the retaining magnet 18 and the connecting rod connection 14a is set to be weaker than the magnetic attraction force acting between the magnet 14b and the ball nut 14c. Therefore, the magnetic attraction force of the retaining magnet 18 will not affect the extension and retraction of the connecting rod mechanism 15 caused by the linear motion mechanism 13 during normal operation.

[0073] also, Figure 10 In this configuration, the magnet 18 is positioned away from the bearing 13c of the linear motion mechanism 13, but it can also be positioned in contact with the bearing 13c.

[0074] Implementation method 3.

[0075] Figure 11This is a schematic diagram of the inspection device according to Embodiment 3. The inspection device 11 in this embodiment is the same as the inspection device in Embodiment 1, but the structure of the linkage mechanism 15 is different. For example... Figure 11 As shown, the linkage mechanism 15 of this embodiment is composed of a first link 15a, a second link 15b, and an extension link 15c. In this linkage mechanism 15, the first link 15a is the driven link, the second link 15b is the driving link, and the first link 15a and the second link 15b constitute the main link. The first link 15a, the second link 15b, and the extension link 15c each have a connector at both ends. One connector of the first link 15a is connected to the base 12. The other connector of the first link 15a is connected to one connector of the extension link 15c. The other connector of the extension link 15c is connected to the inspection sensor 16. One connector of the second link 15b is connected to the link connection portion 14a. The other connector of the second link 15b is rotatably connected to the other connector of the first link 15a. The length of the extension link 15c is longer than the lengths of the first link 15a and the second link 15b. Furthermore, Figure 11 In the diagram, the width of extension link 15c is shown to be larger than the widths of the first link 15a and the second link 15b, but this is for ease of identification on the drawing. It would also be acceptable if the width of extension link 15c were the same as the widths of the first link 15a and the second link 15b.

[0076] Figure 12 and Figure 13 This is a schematic diagram illustrating the operation of the linkage mechanism according to this embodiment. Figure 12 and Figure 13 In the diagram, the left side shows the linkage 15 in its retracted state, and the right side shows the linkage 15 in its extended state. Furthermore, Figure 12 This illustrates the operation of the linkage mechanism 15 in which the extension link 15c is fixed to the first link 15a. Figure 13 The operation of the linkage mechanism 15, in which the extension link 15c is fixed to the inspection sensor 16, is shown. Additionally, Figure 12 and Figure 13 In the linkage mechanism shown, the distances between the pairs of the first link 15a, the second link 15b, and the extension link 15c are the same.

[0077] like Figure 12 As shown, in the linkage mechanism 15 where the extension link 15c is fixed to the first link 15a, the distance between the pairs of each link is the same. Therefore, the movement distance L1 of the inspection sensor 16 in the direction orthogonal to the operating direction of the linear motion mechanism 13 is approximately equal to the operating distance L2 of the linear motion mechanism 13. Furthermore, as... Figure 13As shown, in the linkage mechanism 15 in which the extension link 15c is fixed to the inspection sensor 16, the distance between the pairs of each link is the same. Therefore, the moving distance L3 of the inspection sensor 16 in the direction orthogonal to the direction of motion of the linear motion mechanism 13 is about 1 / 2 of the moving distance L4 of the linear motion mechanism 13.

[0078] Generally, it is known that the thrust through a linkage mechanism is inversely proportional to the ratio of the distance the force point moves to the distance the point of application moves. Figure 12 and Figure 13 In the linkage 15 shown, if the thrust generated by the linear motion mechanism 13 is the same, the closer the linkage 15 is to its minimum retraction state, the smaller the pressing force of the inspection sensor 16. To use this inspection device in various sizes of rotary motors, the pressing force of the inspection sensor 16 needs to be set based on a rotary motor with the shortest distance from the inner circumferential surface of the stator to the rotor wedge. In the inspection device of this embodiment, by selecting the fixed object of the extension linkage 15c, the movement distance of the inspection sensor 16 can be changed relative to the operating distance of the linear motion mechanism 13. For example, as... Figure 13 As shown, by employing an extended linkage to fix the linkage mechanism to the inspection sensor, the minimum thrust requirement of the linear motion mechanism can be reduced. As a result, the linear motion mechanism can be miniaturized, and the inspection device can be made thinner.

[0079] Figure 14 This is a schematic diagram of other linkage mechanisms in this embodiment. Figure 14 The linkage mechanism 15 shown consists of a first link 15a, a second link 15b, and three extended links 15c, 15d, and 15e. In this linkage mechanism 15, the first link 15a is the driven link, the second link 15b is the driving link, and the first link 15a and the second link 15b constitute the main link. The first link 15a, the second link 15b, and the three extended links 15c, 15d, and 15e each have a connector at both ends. One connector of the first link 15a is connected to one connector of the extended link 15d. The other connector of the extended link 15d is connected to the base. The other connector of the first link 15a is connected to one connector of the extended link 15c. The other connector of the extended link 15c is connected to a check sensor 16. One connector of the second link 15b is connected to one connector of the extended link 15e. The other connector of the extended link 15e is connected to the link connection part. Another joint of the second link 15b is rotatably connected to another joint of the first link 15a. The extension links 15c, 15d, and 15e are longer than the first link 15a and the second link 15b. Additionally, Figure 14In the diagram, the widths of extension links 15c, 15d, and 15e are shown to be larger than the widths of the first link 15a and the second link 15b, but this is for ease of identification on the drawing. It would also be acceptable if the widths of extension links 15c, 15d, and 15e were the same as the widths of the first link 15a and the second link 15b.

[0080] Figure 15 , Figure 16 and Figure 17 This is a schematic diagram illustrating the operation of other linkage mechanisms in this embodiment. Figure 15 , Figure 16 and Figure 17 In the diagram, the left side shows the state of the linkage 15 after it has retracted, and the right side shows the state of the linkage 15 after it has extended. Figure 15 The operation of the linkage mechanism 15 is shown, in which extension links 15c and 15d are fixed to the first link 15a and extension link 15e is fixed to the second link 15b. Figure 16 The operation of the linkage mechanism 15 is shown, in which the extension link 15c is fixed to the inspection sensor 16, the extension link 15d is fixed to the first link 15a, and the extension link 15e is fixed to the second link 15b. Figure 17 The operation of the linkage mechanism 15, in which the extension link 15e is fixed to the link connection portion and the extension link 15d is fixed to the base, is shown. Additionally, Figure 15 , Figure 16 and Figure 17 In the linkage mechanism shown, the distances between the pairs of the first link 15a, the second link 15b, and the extension links 15c, 15d, and 15e are the same.

[0081] like Figure 15 As shown, in the linkage mechanism 15 where extension links 15c and 15d are fixed to the first link 15a and extension link 15e is fixed to the second link 15b, the distance between the pairs of each link is the same. Therefore, the movement distance L1 of the inspection sensor 16 in the direction orthogonal to the direction of motion of the linear motion mechanism 13 is approximately equal to the movement distance L2 of the linear motion mechanism 13. Furthermore, as... Figure 16 As shown, in the linkage mechanism 15 where the extension link 15c is fixed to the inspection sensor 16, the extension link 15d is fixed to the first link 15a, and the extension link 15e is fixed to the second link 15b, the distance between the pairs of each link is the same. Therefore, the moving distance L3 of the inspection sensor 16 in the direction orthogonal to the operating direction of the linear motion mechanism 13 is approximately half the operating distance L4 of the linear motion mechanism 13. Furthermore, as... Figure 17As shown, in the linkage mechanism 15 where the extension link 15e is fixed to the link connection part and the extension link 15d is fixed to the base, the distance between the pairs of each link is the same. Therefore, the moving distance L5 of the inspection sensor 16 in the direction orthogonal to the action direction of the linear motion mechanism 13 is about 1 / 2 of the action distance L6 of the linear motion mechanism 13.

[0082] In the inspection apparatus of this embodiment, by selecting the fixed objects of the extension links 15c, 15d, and 15e, the movement distance of the inspection sensor 16 relative to the operating distance of the linear motion mechanism 13 can be changed. For example, as Figure 17 As shown, by employing a linkage mechanism in which the extended link 15e is fixed to the link connection and the extended link 15d is fixed to the base, the minimum thrust requirement of the linear motion mechanism 13 can be reduced. As a result, the linear motion mechanism can be miniaturized and the inspection device can be made thinner.

[0083] Figure 17 The movable distance of the linear motion mechanism in the linkage 15 shown is: Figure 15 and Figure 16 The movable distance of the linear motion mechanism in the linkage 15 shown is approximately half that of the linear motion mechanism. Furthermore, assuming equal operating speeds of the linear motion mechanisms, Figure 17 The extension ratio of the linkage 15 shown Figure 15 and Figure 16 The linkage mechanism 15 shown needs to be fast. Therefore, Figure 17 The linkage 15 shown can increase the pressing force of the inspection sensor 16 with a shorter linear motion distance of the linear motion mechanism.

[0084] in addition, Figure 14 In the linkage mechanism 15 shown, extension links 15c, 15d, and 15e are positioned to clamp the first link 15a and the second link 15b. However, the linkage mechanism of this embodiment is not limited to this structure. For example, other linkage mechanisms may be adopted that only have Figure 14 The linkage mechanism shown is a linkage mechanism having at least one of the extended links 15c, 15d, and 15e. Furthermore, as other linkage mechanisms, those having only... Figure 14 The linkage mechanism shown is a linkage mechanism consisting of at least two of the extension links 15c, 15d, and 15e. Alternatively, extension links 15c, 15d, and 15e can be constructed using multiple links respectively.

[0085] Implementation method 4.

[0086] Figure 18This is a schematic diagram of the inspection device according to Embodiment 4. The inspection device 11 of this embodiment includes a base 12, an opposing linear motion mechanism 23, a first connecting mechanism 24, a second connecting mechanism 26, a linkage mechanism 25, and an inspection sensor 16.

[0087] The opposing linear motion mechanism 23 is, for example, a ball screw mechanism, consisting of a ball screw 23a, a motor 23b, and a bearing 23c. The ball screw 23a is connected to a first connecting mechanism 24 and a second connecting mechanism 26. The opposing linear motion mechanism 23 has the function of causing the first connecting mechanism 24 and the second connecting mechanism 26 connected to the ball screw 23a to move linearly the same distance simultaneously in opposite directions. A pair of ball screw mechanisms can be used as examples of mechanisms that perform this action. In the opposing linear motion mechanism 23, the motor 23b receives a signal from an external remote device 17 and rotates, causing the first connecting mechanism 24 and the second connecting mechanism 26 to move linearly the same distance simultaneously in opposite directions via the ball screw 23a. For example, when the motor 23b rotates forward, the opposing linear motion mechanism 23 causes the first connecting mechanism 24 to move to the left, while simultaneously causing the second connecting mechanism 26 to move to the right. Furthermore, when the motor 23b reverses, the opposing linear motion mechanism 23 causes the first connecting mechanism 24 to move to the right, and at the same time causes the second connecting mechanism 26 to move to the left.

[0088] The first connecting mechanism 24 consists of a first link connecting part 24a, a magnet 24b, and a ball nut 24c. The ball nut 24c moves linearly by the rotation of the ball screw 23a of the opposing linear motion mechanism 23. That is, the ball nut 24c is a linkage part that is linked to the linear motion of the opposing linear motion mechanism 23 in the first connecting mechanism 24. The first link connecting part 24a is made of a metal magnetic body and is connected to the ball nut 24c by the magnetic attraction of the magnet 24b. The first link connecting part 24a is not directly linked to the linear motion of the ball screw 23a of the opposing linear motion mechanism 23, but is constrained to have a degree of freedom in the linear motion direction of the opposing linear motion mechanism. For example, the first link connecting part 24a is supported by a linear motion guide arranged parallel to the linear motion direction of the opposing linear motion mechanism 23 (not shown). Alternatively, the first link connecting portion 24a has a through hole through which the ball screw 23a passes, and the first link connecting portion 24a is supported by the ball screw 23a in the through hole. The second connecting mechanism 26 is composed of the second link connecting portion 26a, the magnet 26b, and the ball nut 26c. The construction of the second connecting mechanism 26 is substantially the same as that of the first connecting mechanism 24. The ball nut 26c moves linearly by the rotation of the ball screw 23a of the opposing linear motion mechanism 23. That is, the ball nut 26c is a linkage part that is linked to the linear motion of the opposing linear motion mechanism 23 in the second connecting mechanism 26. Furthermore, the second link connecting portion 26a is not directly linked to the linear motion of the ball screw 23a of the opposing linear motion mechanism 23, but is constrained to have a degree of freedom in the linear motion direction of the opposing linear motion mechanism. The first link connecting part 24a and the second link connecting part 26a are respectively positioned further outward than the ball nut 24c and the ball nut 26c.

[0089] The maximum connecting force generated by the magnetic attraction between the first link connection 24a and the ball nut 24c is set to be greater than the force applied to the link mechanism 25 at the point of force applied to the inspection sensor 16 for inspection, and less than the force applied to the link mechanism 25 at the point of force applied to retract the link mechanism 25 in an emergency. Similarly, the maximum connecting force generated by the magnetic attraction between the second link connection 26a and the ball nut 26c is set to be greater than the force applied to the link mechanism 25 at the point of force applied to the inspection sensor 16 for inspection, and less than the force applied to the link mechanism 25 at the point of force applied to retract the link mechanism 25 in an emergency.

[0090] The linkage mechanism 25 consists of a first link 25a and a second link 25b. The linkage mechanism 25 has no fulcrum and is configured to operate through two force points. The first link 25a and the second link 25b each have a connector at both ends. One connector of the first link 25a is connected to the first link connection portion 24a. The other connector of the first link 25a is connected to a check sensor 16. One connector of the second link 25b is connected to the second link connection portion 26a. The other connector of the second link 25b is connected to the check sensor 16. The linkage mechanism 25 connects the first link connection portion 24a and the second link connection portion 26a... Figure 18 The left and right movement is converted into the movement of the sensor 16. Figure 18 The linkage 25 moves vertically. That is, if the first link connection 24a and the second link connection 26a move linearly in a direction separating them, the linkage 25 retracts. If the first link connection 24a and the second link connection 26a move linearly in a direction approaching each other, the linkage 25 extends.

[0091] The stroke of the opposing linear motion mechanism 23 needs to be set such that the linkage 25 can move linearly and can retract to its minimum. When the distance between the pairs of the first link 25a and the distance between the pairs of the second link 25b are the same, the stroke of the opposing linear motion mechanism 23 is set to a length that is more than four times the distance between the pairs.

[0092] Next, the normal and emergency operations of the inspection device 11 will be explained in turn. Furthermore, for the sake of simplicity, the effect of gravity will not be mentioned in the following description.

[0093] First, the normal operation of the inspection device 11 will be explained. Figures 19 to 21 This is a schematic diagram illustrating the normal operation of the inspection device 11 in this embodiment. Figure 19 This is a schematic diagram showing the inspection device 11 being inserted into the rotary motor. (Example) Figure 19As shown, when inserted into the rotary motor, in order to pass through the narrowest gap between the stator 2 and the rotor stop wheel 33, the inspection device 11 makes the linkage mechanism 25 in its most retracted state. At this time, no external force is applied between the first link connection 24a and the ball nut 24c of the first connecting mechanism 24 in either the compression or separation direction. Therefore, the first link connection 24a and the ball nut 24c are connected by the magnetic attraction of the magnet 24b. Similarly, no external force is applied between the second link connection 26a and the ball nut 26c of the second connecting mechanism 26 in either the compression or separation direction. Therefore, the second link connection 26a and the ball nut 26c are connected by the magnetic attraction of the magnet 26b. As a result, the linkage mechanism 25 and the opposing linear motion mechanism 23 are connected by the first connecting mechanism 24 and the second connecting mechanism 26.

[0094] Figure 20 This is a schematic diagram of the inspection device 11 inspecting the rotor wedge 32. (See diagram below.) Figure 20 As shown, when inspecting the rotary motor, the inspection device 11 extends the linkage mechanism 25 to press the inspection sensor 16 against the rotor wedge 32. At this time, an external force is applied in the separation direction between the first linkage connection 24a and the ball nut 24c of the first connecting mechanism 24. However, as described above, since the magnetic attraction of the magnet 24b is greater than this external force, the first linkage connection 24a and the ball nut 24c remain connected. Similarly, the second linkage connection 26a and the ball nut 26c remain connected. As a result, the linkage mechanism 25 and the opposing linear motion mechanism 23 are connected via the first connecting mechanism 24 and the second connecting mechanism 26.

[0095] Figure 21 This is a schematic diagram of the inspection device 11 moving to the next inspection position. (Example) Figure 21 As shown, the inspection device 11 retracts the linkage mechanism 25 to the intermediate position, allowing the inspection sensor 16 to move away from the rotor wedge 32. No external force is applied between the first linkage connection 24a and the ball nut 24c of the first connecting mechanism 24 in either the compression or separation direction; therefore, the first linkage connection 24a and the ball nut 24c are connected by the magnetic attraction of the magnet 24b. Similarly, the second linkage connection 26a and the ball nut 26c are connected by the magnetic attraction of the magnet 26b. As a result, the linkage mechanism 25 and the opposing linear motion mechanism 23 are connected via the first connecting mechanism 24 and the second connecting mechanism 26. The inspection device 11 is moved to the next inspection position using the insertion rod 22.

[0096] Therefore, through repetition Figures 20 to 21As shown, the inspection device 11 can perform inspections of the rotary motor. When the inspection device 11 operates normally, in the first connecting mechanism 24, the first link connecting part 24a, the magnet 24b, and the ball nut 24c move as a unit. Similarly, in the second connecting mechanism 26, the second link connecting part 26a, the magnet 26b, and the ball nut 26c move as a unit.

[0097] Next, the emergency operation of the inspection device 11 will be explained. Figures 22 to 25 This is a schematic diagram illustrating the emergency operation of the inspection device 11 in this embodiment. The emergency operation is as follows: when the inspection device 11 is inspecting the rotor wedge 32, if an abnormality occurs in the inspection device, the inspection device 11 is removed from the rotating motor. Furthermore, the abnormality of the inspection device refers to the inability of the opposing linear motion mechanism 23 to operate normally, thus preventing control of the extension and retraction of the linkage mechanism 25. Assuming that in... Figure 21 The inspection device 11 malfunctioned in the state shown. Figure 21 In the state shown, if an abnormality occurs in the inspection device 11, the linkage mechanism 25 is in the extended intermediate position. Furthermore, the first link connection portion 24a of the first connecting mechanism 24 is connected to the ball nut 24c via the magnetic attraction of the magnet 24b. Similarly, the second link connection portion 26a of the second connecting mechanism 26 is connected to the ball nut 26c via the magnetic attraction of the magnet 26b.

[0098] Figure 22 This is a schematic diagram showing the inspection device 11 being removed from the right side using the insertion rod 22. (See diagram below.) Figure 22 As shown, the linkage mechanism 25 of the inspection device 11 is in an extended state, and therefore, the linkage mechanism 25 is in contact with the rotor stop wheel 33 on the right side. In this state, if the insertion rod 22 is used to further apply force to the inspection device 11 in the extraction direction on the right side, the force acts on the linkage mechanism 25 in the opposite direction to the extraction direction. At this time, the force in the opposite direction to the extraction direction acts on the first linkage connection 24a via the linkage mechanism 25. If the force acting on the first linkage connection 24a is greater than the magnetic attraction connecting the first linkage connection 24a and the ball nut 24c, the first linkage connection 24a separates from the ball nut 24c. That is, the maximum connection force between the first linkage connection 24a and the ball nut 24c is a predetermined force; if a force greater than this predetermined force acts on the linkage mechanism 25, the connection between the first linkage connection 24a and the ball nut 24c is released. Since the first connecting rod connection 24a has a degree of freedom in the linear motion direction, it separates from the ball nut 24c along the linear motion direction. Figure 22The diagram shows the state after the first link connection 24a separates from the ball nut 24c. The first link connection 24a moves away from the ball nut 24c, causing the link mechanism 25 to retract. As a result, the position of the inspection sensor 16 decreases, and the link structure 25 retracts to a state where the inspection device 11 can pass through the gap between the rotor stop wheel 33 on the right and the stator 2. Figure 23 The state of the inspection device 11 through the gap between the rotor stop wheel 33 on the right and the stator 2 is shown. Thus, even if the inspection device 11 malfunctions, it can be removed from the rotary motor.

[0099] Figure 24 This is a schematic diagram showing the inspection device 11 being removed from the left side using the insertion rod 22. (See diagram below.) Figure 24 As shown, the linkage mechanism 25 of the inspection device 11 is in an extended state, and therefore, the linkage mechanism 25 is in contact with the rotor stop wheel 33 on the left side. In this state, if the insertion rod 22 is used to further apply force to the inspection device 11 in the extraction direction on the left, the force acts on the linkage mechanism 25 in the opposite direction to the extraction direction. At this time, the force in the opposite direction to the extraction direction acts on the second linkage connection 26a via the linkage mechanism 25. If the force acting on the second linkage connection 26a is greater than the magnetic attraction connecting the second linkage connection 26a and the ball nut 26c, the second linkage connection 26a separates from the ball nut 26c. That is, the maximum connection force between the second linkage connection 26a and the ball nut 26c is a predetermined force; if a force greater than this predetermined force acts on the linkage mechanism 25, the connection between the second linkage connection 26a and the ball nut 26c is released. Since the second link connection 26a has a degree of freedom in the linear motion direction, it separates from the ball nut 26c along the linear motion direction. Figure 24 The diagram shows the state after the second link connection 26a separates from the ball nut 26c. The second link connection 26a moves away from the ball nut 26c, causing the link mechanism 25 to retract. As a result, the position of the inspection sensor 16 decreases, and the link structure 25 retracts to a state where the inspection device 11 can pass through the gap between the left rotor stop wheel 33 and the stator 2. Figure 25 The state of the inspection device 11 through the gap between the rotor stop wheel 33 on the left and the stator 2 is shown. Thus, even if the inspection device 11 malfunctions, it can be removed from the rotary motor.

[0100] In addition, as an emergency action, it is explained that... Figure 21 The inspection device 11 malfunctioned under the conditions shown. Figure 20In the event of an abnormality occurring in the indicated state, if the inspection device 11 is removed using the insertion rod 22, the inspection sensor 16 will come into contact with the step of the rotor wedge 32. Even in this case, if the inspection device 11 is further forced in the removal direction using the insertion rod 22, the force will also act on the linkage mechanism 25 via the inspection sensor 16 in the opposite direction to the removal direction. Due to this force, the first linkage connection 24a separates from the ball nut 24c, or the second linkage connection 26a separates from the ball nut 26c, thus retracting the linkage mechanism 25. As a result, the inspection device 11 can be removed from the rotary motor.

[0101] In this inspection device, when an overload is applied to the first or second connecting mechanism, the connection between the first or second connecting rod and the ball nut is released, and the first or second connecting rod separates from the ball nut, thereby causing the linkage mechanism 25 to retract. As a result, even if the drive unit for the extension and retraction of the linkage mechanism, i.e., the opposing linear motion mechanism, malfunctions, the inspection device can be removed without removing the rotor from the rotary motor, and without damaging the rotary motor or the inspection device. Furthermore, the inspection device can be removed regardless of which direction it is moved. Therefore, the inspection device can be quickly removed from the end of the rotary motor, which is closer to the location where the malfunction occurred.

[0102] Implementation method 5.

[0103] Figure 26 This is a schematic diagram of the inspection device according to Embodiment 5. The inspection device 11 consists of an elongated base 12, a linear motion mechanism 13, a third connecting mechanism 34, a linkage mechanism 15, a fourth connecting mechanism 36, and an inspection sensor 16. The base 12 is, for example, a metal component, and the linear motion mechanism 13, the fourth connecting mechanism 36, etc. are mounted on it.

[0104] The linear motion mechanism 13 is, for example, a ball screw mechanism, consisting of a ball screw 13a, a motor 13b, and a bearing 13c. The ball screw 13a is connected to a third connecting mechanism 34. In the linear motion mechanism 13, the motor 13b receives a signal from an external remote device 17 and rotates, causing the third connecting mechanism 34 to move linearly via the ball screw 13a. The third connecting mechanism 34 moves in conjunction with the linear motion of the linear motion mechanism 13.

[0105] The fourth connecting mechanism 36 comprises a link connecting part 36a, a magnet 36b, and a fixing part 36c. The fixing part 36c is fixed to the base 12. The magnet 36b is fixed to the fixing part 36c. The link connecting part 36a is made of a metallic magnetic body and is connected to the fixing part 36c by the magnetic attraction of the magnet 36b. Alternatively, the link connecting part 36a may be configured to have a magnet different from the magnet 36b built in. The link connecting part 36a is not directly connected to the base 12, but is connected to the fixing part 36c by the magnetic attraction of the magnet 36b. In other words, the link connecting part 36a is the separating part of the fourth connecting mechanism 36. When no external force is applied, the link connecting part 36a and the fixing part 36c of the fourth connecting mechanism 36 are connected by the magnetic attraction of the magnet 36b. Furthermore, the connecting part 36a and the fixing part 36c can be connected by magnetic attraction, so the magnet 36b can be fixed to the connecting part 36a. In this case, the fixing part 36c needs to be made of a magnetic material or have other magnets built in.

[0106] The maximum connecting force generated by the magnetic attraction between the connecting part 36a and the fixing part 36c is set to be greater than the force applied to the force point of the linkage mechanism 15 to apply pressure to the inspection sensor 16, and less than the force applied to the force point of the linkage mechanism 15 to retract the linkage mechanism 15 in an emergency action.

[0107] The linkage mechanism 15 consists of a first link 15a and a second link 15b. Both links 15a and 15b have connectors at both ends. One connector of the first link 15a is connected to a link connection portion 36a. The other connector of the first link 15a is connected to a check sensor 16. One connector of the second link 15b is connected to a third connection mechanism 34. The other connector of the second link 15b is rotatably connected to approximately the center of the first link 15a. In this linkage mechanism 15, the first link 15a is the driven link, and the second link 15b is the driving link.

[0108] In the normal operation of the inspection device 11 configured in this way, when the linkage mechanism 15 is extended to press the inspection sensor 16 against the rotor wedge 32, an external force is applied in the separation direction between the linkage connection portion 36a and the fixing portion 36c of the fourth connection mechanism 36. In this case, since the magnetic attraction force of the magnet 36b is greater than the external force, the linkage connection portion 36a and the fixing portion 36c remain connected by the magnetic attraction force of the magnet 36b.

[0109] Next, during the emergency operation of the inspection device 11, if the inspection device 11 is moved in the removal direction, the linkage mechanism 15 of the inspection device 11 is in an extended state, and therefore the linkage mechanism 15 contacts the rotor stop wheel. If a further force is applied to the inspection device 11 in the removal direction in this state, the force acts on the linkage mechanism 15 in the opposite direction to the removal direction. At this time, the force in the same direction as the removal direction acts on the linkage connection portion 36a of the fourth connecting mechanism 36 via the linkage mechanism 15. If the force acting on the linkage connection portion 36a is greater than the magnetic attraction connecting the linkage connection portion 36a and the fixed portion 36c, the linkage connection portion 36a separates from the fixed portion 36c. That is, the maximum connection force between the linkage connection portion 36a and the fixed portion 36c is a predetermined force; if a force greater than this predetermined force acts on the linkage mechanism 15, the connection between the linkage connection portion 36a and the fixed portion 36c is released. The connecting rod connection 36a moves away from the fixed part 36c, causing the connecting rod mechanism 15 to retract. As a result, the position of the inspection sensor 16 drops, and the connecting rod structure 15 retracts to a state where the inspection device 11 can pass through the gap between the rotor stop wheel and the stator. Thus, even if the inspection device 11 malfunctions, it can be removed from the rotary motor.

[0110] In this type of inspection device, when an overload is applied to the fourth connecting mechanism, the connection between the connecting rod and the fixed part is released, and the connecting rod and the fixed part separate. Therefore, even if the drive unit of the linkage mechanism, i.e., the linear motion mechanism, fails to operate normally, the linkage mechanism will still retract. As a result, the inspection device can be removed without detaching the rotor from the rotating motor, and neither the rotating motor nor the inspection device is damaged.

[0111] Implementation method 6.

[0112] Figure 27 This is a schematic diagram of the inspection system according to Embodiment 6. The inspection system of this embodiment includes the inspection device shown in Embodiment 1. For example... Figure 27As shown, the inspection system 100 of this embodiment includes an inspection device 11, a moving body 101, a control unit 102, a control cable 103, and an emergency rope 104. The moving body 101 is composed of a first moving body 101a and a second moving body 101b. Both the first moving body 101a and the second moving body 101b are equipped with a traveling device such as an endless track. The inspection device 11 is connected to the first moving body 101a and the second moving body 101b at a position sandwiched between them using a connecting member 105. The control unit 102 outputs control signals to control the moving body 101 and the inspection device 11. The control cable 103 transmits the control signals output by the control unit 102 to the moving body 101 and the inspection device 11. The emergency rope 104 is connected to the moving body 101 and is used when the moving body 101 is removed from the rotary motor in case of a malfunction in its traveling device. Furthermore, Figure 27 In this configuration, the control cable 103 and the emergency rope 104 are connected to the moving body 101, but they can also be connected to the inspection device 11. Alternatively, the emergency rope 104 can be omitted, and the control cable 103 can serve as the emergency rope 104.

[0113] Figures 28 to 30 This is a schematic diagram illustrating an example of the operation of the inspection system 100 according to this embodiment. The inspection system 100 moves with the moving body 101 attached to the inner circumferential surface of the stator 2. When the inspection system 100 reaches a predetermined position, the inspection sensor 16 of the inspection device 11 is pressed against the rotor wedge 32 for inspection.

[0114] Figure 28 The normal operation of the inspection system 100 is shown. The inspection system 100 moves to the inspection position via the moving body 101. Then, the inspection system 100 repeatedly performs an extension action of the linkage mechanism for pressing the inspection sensor 16 against the rotor wedge 32 and a retraction action of the linkage mechanism for separating the inspection sensor 16 from the rotor wedge 32. Thus, the inspection system 100 performs the inspection of the rotor 3 while moving on the inner circumferential surface of the stator 2.

[0115] Figure 29 This illustrates a situation where the linear motion mechanism of the inspection device 11 malfunctions. In this situation, the inspection system 100 is moved to the end of the rotor stop wheel 33 by retracting the moving body 101. Furthermore, in the event of a malfunction in the travel mechanism of the moving body 101, in addition to a malfunction in the linear motion mechanism, the inspection system 100 is moved to the end of the rotor stop wheel 33 by pulling the emergency rope 104 provided with the inspection system 100 from outside the rotary motor.

[0116] Figure 30This shows the condition of the inspection system 100 passing through the gap between the rotor stop wheel 33 and the stator 2. If the inspection system 100, reaching the end of the rotor stop wheel 33, causes the moving body 101 to retract further, or further pulls the emergency rope 104, the emergency action function of the inspection device 11 is activated. That is, the connection between the linkage connecting part and the ball nut of the connecting mechanism of the inspection device 11 is released, the linkage connecting part separates from the ball nut, thereby retracting the linkage mechanism 15. As a result, as Figure 30 As shown, the inspection system 100 can check the gap between the rotor stop wheel 33 and the stator 2.

[0117] Furthermore, the inspection system of this embodiment includes the inspection device shown in Embodiment 1. This inspection system may also include the inspection devices shown in Embodiments 2 to 5, instead of the inspection device shown in Embodiment 1.

[0118] This application describes various exemplary embodiments, but the various features, forms and functions described in one or more embodiments are not limited to the application of a specific embodiment, and can be applied to the embodiment alone or in various combinations.

[0119] Therefore, it can be assumed that numerous variations not illustrated are also included within the scope of the technology disclosed in this application. For example, this includes cases where at least one constituent element is modified, added to, or omitted, and cases where at least one constituent element is extracted and combined with constituent elements of other embodiments.

[0120] Label Explanation

[0121] 1 Rotary motor

[0122] 2 stators

[0123] 3 rotors

[0124] 11 Inspection Device

[0125] 12 bases

[0126] 13 Linear Motion Mechanisms

[0127] 13a and 23a ball screws

[0128] 13b and 23b motors

[0129] 13c and 23c bearings

[0130] 14 connecting mechanisms

[0131] 14a and 36a connecting rod joints

[0132] 14b, 24b, 26b, 36b magnets

[0133] 14C, 24C, 26C ball nuts

[0134] 15-bar linkage and 25-bar linkage

[0135] 15a, 25a first link

[0136] 15b, 25b second link

[0137] 15c, 15d, 15e extension links

[0138] 16. Check the sensors

[0139] 17 remote devices

[0140] 8. Keep the magnet

[0141] 22 Insertion Rod

[0142] 23. Opposite-moving linear motion mechanism

[0143] 24 First connecting mechanism

[0144] 24a First Linkage Connection

[0145] 26 Second connecting mechanism

[0146] 26a Second Linkage Connection

[0147] 31 Rotor shaft

[0148] 32 Rotor wedge

[0149] 33 Rotor stop wheel

[0150] 34 Third connecting mechanism

[0151] 36 Fourth connecting mechanism

[0152] 36c Fixing part

[0153] 100 Inspection System

[0154] 101 moving bodies

[0155] 102 Control Department

[0156] 103 Control Cable

[0157] 104 Emergency Rope

[0158] 105 Connecting structural components.

Claims

1. An inspection device for a rotary electric motor, comprising: Base; A linear motion mechanism is mounted on the base and performs linear motion relative to the base within its range of motion. A linkage mechanism having a driving link and a driven link, the driven link being connected to the base, and extending or retracting in a direction intersecting the direction of the linear motion mechanism through the linear motion of the linear motion mechanism; A connecting mechanism that connects the driving link of the linkage mechanism to the linear motion mechanism; as well as The sensor, which is mounted on the linkage mechanism, is characterized in that the inspection device for the rotary motor is... The connecting mechanism has a link connecting part connected to the prime mover and a linkage part connected to the link connecting part and, within the range of motion, in a state of connection with the link connecting part, is linked to the linear motion of the linear motion mechanism. If a force greater than a predetermined force is applied to the linkage mechanism, the connection between the link connecting part and the linkage part is released, and the link connecting part separates from the linkage part in the direction that causes the linkage mechanism to contract.

2. The inspection device for a rotary electric motor as described in claim 1, characterized in that, The connecting mechanism includes a magnet, and the connecting rod connection part and the linkage part are connected by the magnetic attraction of the magnet.

3. The inspection device for a rotary electric motor as described in claim 2, characterized in that, The base also includes a retaining magnet, which retains the connecting part of the linkage by magnetic attraction when the linkage mechanism is in its most retracted state.

4. The inspection device for a rotary electric motor as described in claim 1, characterized in that, The base also includes a retaining magnet, which retains the connecting part of the linkage by magnetic attraction when the linkage mechanism is in its most retracted state.

5. The inspection device for a rotary electric motor as described in any one of claims 1 to 4, characterized in that, The linkage mechanism includes: a main linkage having the driving linkage and the driven linkage; and a first extension linkage connecting the main linkage to the sensor, the first extension linkage being fixed to the main linkage or the sensor.

6. The inspection device for a rotary electric motor as described in claim 5, characterized in that, The first extension link is composed of multiple links.

7. The inspection device for a rotary electric motor as described in any one of claims 1 to 4, characterized in that, The linkage mechanism includes: a main link having the driving link and the driven link; and a second extension link connecting the driven link to the base, the second extension link being fixed to the driven link or the base.

8. The inspection device for a rotary electric motor as described in claim 7, characterized in that, The second extension link is composed of multiple links.

9. The inspection device for a rotary electric motor as described in any one of claims 1 to 4, characterized in that, The linkage mechanism includes: a main link having the driving link and the driven link; and a third extension link connecting the driving link to the link connection portion, the third extension link being fixed to the driving link or the link connection portion.

10. The inspection device for a rotary electric motor as described in claim 9, characterized in that, The third extension link is composed of multiple links.

11. An inspection device for a rotary electric motor, comprising: Base; An opposing linear motion mechanism is mounted on the base and performs linear motion relative to the base within its range of motion. A linkage mechanism having a first link and a second link each having at least one joint, which extends or retracts in a direction intersecting the direction of the linear motion of the opposing linear motion mechanism by the linear motion of the opposing linear motion mechanism. Two connecting mechanisms connect one joint of the first link and one joint of the second link to the opposing linear motion mechanism, respectively; and The sensor, which is mounted on the linkage mechanism, is characterized in that the inspection device for the rotary motor is... The opposing linear motion mechanism has the function of enabling the two connecting mechanisms to move simultaneously and linearly by the same distance in opposite directions. Each of the two connecting mechanisms has a link connecting portion connected to one of the joints, and a linkage portion connected to the link connecting portion and, within the range of motion, in a state of connection with the link connecting portion, is linked to the linear motion of the opposing linear motion mechanism. If a force greater than a predetermined force is applied to the link mechanism, the connection between the link connecting portion and the linkage portion of one of the connecting mechanisms is released, and the link connecting portion separates from the linkage portion in the direction that causes the link mechanism to retract.

12. An inspection device for a rotary electric machine, comprising: Base; A linear motion mechanism is mounted on the base and performs linear motion relative to the base within its range of motion. A linkage mechanism having a driving link and a driven link, the driving link being connected to the linear motion mechanism, and extending or retracting in a direction intersecting the direction of the linear motion mechanism through the linear motion of the linear motion mechanism; A connecting mechanism that connects the driven link to the base; and The sensor, which is mounted on the linkage mechanism, is characterized in that the inspection device for the rotary motor is... The connecting mechanism has a link connecting portion connected to the driven link, and a fixing portion connected to the link connecting portion and fixed to the base in the state where the linear motion mechanism is performing the linear motion within the range of motion. If a force greater than a predetermined force is applied to the link mechanism, the connection between the link connecting portion and the fixing portion is released, and the link connecting portion separates from the fixing portion in the direction that causes the link mechanism to retract.

13. An inspection system for a rotary electric machine, characterized in that, include: Inspection apparatus for a rotary electric motor as described in any one of claims 1 to 12; A movable body connected to the inspection device; A control unit that outputs control signals to control the inspection device and the moving body; as well as A control cable connects at least one of the inspection device and the moving body to the control unit, transmitting the control signal.

Images