Endoscope for aero-engine borescope

Abstract

The invention discloses an aero-engine borescope endoscope which comprises a main machine, the main machine is connected with a handle through a wire, the handle is electrically connected with a probe, a positioning sleeve is movably assembled and connected to the periphery of the joint of the handle and the probe, and the positioning sleeve comprises a rotating sleeve and a limiting sleeve which are rotationally connected. The probe penetrates through the center of the rotating sleeve and the center of the limiting sleeve, clamping assemblies are embedded in the end face, away from the rotating sleeve, of the limiting sleeve, the clamping assemblies are distributed in an array mode with the circle center of the end face of the limiting sleeve as the circle center, and when the rotating sleeve and the limiting sleeve rotate relatively, the multiple clamping assemblies synchronously move relative to the circle center of the limiting sleeve. According to the invention, the probe can reduce the contact with the inner wall of the detection hole, the extension of the probe is more stable, and further, after the probe extends to a detection point, the probe can rotate to detect the inner wall of the whole hole, and in the process, the tail end of the probe can also be prevented from being in contact with the inner wall, so that the damage is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of endoscopes, in particular to an endoscope for bore detection of aerospace engines. Background Art

[0002] Industrial endoscopes are mainly used in automobiles, aircraft engines, pipelines, mechanical parts, etc. They can achieve non-destructive testing without disassembling or destroying the assembly and stopping the equipment. They are widely used in various departments of modern core industries such as aviation, automobiles, ships, electrical, chemical, electricity, gas, atomic energy, civil engineering, etc.

[0003] Chinese Patent Publication No.: CN107561679A discloses an industrial endoscope, including a main body part, a connecting part and a probe part, wherein the main body part is connected to the probe part through the connecting part, and the probe part includes an illumination lamp, a visible light camera and an infrared thermal imaging sensor, one end of the probe part is connected to the connecting part, and the illumination lamp, the visible light camera and the infrared thermal imaging sensor are arranged at the other end of the probe part.

[0004] In this solution, after the end of the probe is inserted into the hole at the detection position, it is easy to constantly touch the inner wall of the hole during the insertion process. When the probe is rotated in the hole, it is more likely to collide with the inner wall of the hole, and the probe is very prone to wear problems. Summary of the invention

[0005] The object of the present invention is to provide an endoscope for aerospace engine borescope to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: An endoscope for aerospace engine borehole detection comprises a mainframe, wherein the mainframe is provided with a handle through a wire connection, the handle is electrically connected with a probe, a positioning sleeve is movably assembled and connected to the peripheral of the connection between the handle and the probe, the positioning sleeve comprises a rotating sleeve and a limit sleeve which are rotatably connected, the probe passes through the centers of the rotating sleeve and the limit sleeve, a clamping assembly is embedded in the end face of the limit sleeve away from the rotating sleeve, the clamping assembly is distributed in an array with the end face center of the limit sleeve, and when the rotating sleeve and the limit sleeve rotate relatively, a plurality of clamping assemblies move synchronously relative to the center of the limit sleeve.

[0007] As a further solution of the present invention: a through hole is embedded in the center of one end of the rotating sleeve facing the limit sleeve, a threaded hole is penetrated through the center of the through hole, the inner diameter of the through hole is larger than the inner diameter of the threaded hole, a flange is extended toward the limit sleeve at the edge of one side of the rotating sleeve facing the limit sleeve, and the flange movable sleeve is arranged on the periphery of the limit sleeve, a core tube is penetrated through the center of the limit sleeve, and the core tube extends into the through hole.

[0008] As a further solution of the present invention: an external thread portion threadedly adapted to the threaded hole is provided around the connection position of the handle and the probe.

[0009] As a further solution of the present invention: a plurality of balls are arranged in an annular array on the inner wall of the core tube, the balls are movably embedded on the inner wall of the core tube, and the balls are distributed along the axial direction of the core tube.

[0010] As a further solution of the present invention: an annular groove is embedded on the side of the rotating sleeve facing the limiting sleeve and outside the through hole, an annular gear is fixedly sleeved and arranged in the opening of the annular groove, and a plurality of ratchet teeth are arranged behind the annular gear in the annular groove.

[0011] As a further solution of the present invention: the ratchet teeth are rotatably connected to the inner side of the annular groove, and a torsion spring is connected between the ratchet teeth and the annular groove, and the ratchet teeth are inclined.

[0012] As a further solution of the present invention: a rotating ring is rotatably embedded on the side of the limiting sleeve facing the rotating sleeve, internal gears are arranged on both the upper and lower sides inside the rotating ring, and the internal gear closer to the rotating sleeve is in clamping fit with the ratchet teeth.

[0013] As a further solution of the present invention: when the annular gear moves to align with the internal gear, the annular gear and the internal gear are correspondingly clamped.

[0014] As a further solution of the present invention: a spring is connected in the through hole, and the end of the spring is rotatably connected to the periphery of the core tube.

[0015] As a further solution of the present invention: multiple groups of strip-shaped grooves are embedded on the end face of the limiting sleeve around the core tube, a clamping component is movably arranged in the strip-shaped grooves, and the internal gear on the side away from the rotating sleeve is in transmission connection with the clamping component.

[0016] As a further solution of the present invention: the clamping component includes a lead screw rotatably connected in the strip-shaped groove, a transmission gear is fixedly connected to the periphery of the end of the lead screw, the transmission gear is in meshing transmission with the internal gear, a clamping plate is slidably connected in the strip-shaped groove, and the end of the clamping plate in the strip-shaped groove is threadedly sleeved and matched with the periphery of the lead screw.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: When not in use usually, the rotating sleeve is assembled and arranged at the connection between the handle and the probe. When performing hole detection on a space engine, the rotating sleeve and the limiting sleeve are moved to the opening of the detection location, and the clamping component is inserted into the opening. By relatively rotating the rotating sleeve and the limiting sleeve, the clamping component can be controlled to drive relatively away from the center of the end face of the limiting sleeve, so as to gradually clamp to the inner wall of the opening of the detection position. And because the probe passes through the centers of the rotating sleeve and the limiting sleeve, the probe can be positioned at the center of the detection position due to the positioning of the clamping component. In this way, the probe can extend into the detection location, and during this process, the probe can reduce touching the inner wall of the detection hole, and the extension of the probe is also more stable. Moreover, further, after the probe extends to the detection point, it can also be rotated to detect the entire inner wall of the hole. During this process, the end of the probe can also avoid touching the inner wall, thus avoiding damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention.

[0019] Figure 2 is a schematic structural diagram of the positioning sleeve in the present invention.

[0020] Figure 3 is Figure 1 an enlarged structural diagram of area A in

[0021] Figure 4 is a schematic structural diagram of the rotating sleeve in the present invention.

[0022] Figure 5 is a sectional view of the rotating sleeve in the present invention.

[0023] Figure 6 is Figure 4 an enlarged structural diagram of area B in

[0024] Figure 7 is Figure 5 an enlarged structural diagram of area C in

[0025] Figure 8 is a schematic structural diagram of the rotating ring in the present invention.

[0026] Figure 9 is a schematic structural diagram of the lead screw and the transmission gear in the present invention.

[0027] In the figure: 1 - main body, 2 - handle, 21 - external thread part, 3 - probe, 4 - positioning sleeve, 5 - rotating sleeve, 51 - through hole, 52 - threaded hole, 53 - annular groove, 54 - annular gear, 55 - ratchet tooth, 6 - limiting sleeve, 61 - core tube, 6101 - ball, 62 - strip groove, 63 - lead screw, 64 - clamping plate, 65 - transmission gear, 66 - rotating ring, 6601 - internal gear. Detailed implementation manner

[0028] Please refer to Figures 1 - 3 In the embodiment of the present invention, an endoscope for aerospace engine hole detection includes a main body 1. The main body 1 is connected with a handle 2 through a wire. The handle 2 is electrically connected with a probe 3. An outer periphery of a connection part between the handle 2 and the probe 3 is movably assembled and connected with a positioning sleeve 4. The positioning sleeve 4 includes a rotating sleeve 5 and a limiting sleeve 6 which are rotatably connected. The probe 3 penetrates through centers of the rotating sleeve 5 and the limiting sleeve 6. A clamping component is embedded in an end face of the limiting sleeve 6 away from the rotating sleeve 5. The clamping components are distributed in an array with the center of the end face of the limiting sleeve 6 as the center, preferably in a cross shape. When the rotating sleeve 5 and the limiting sleeve 6 rotate relative to each other, a plurality of clamping components synchronously move relative to the center of the end face of the limiting sleeve 6.

[0029] Specifically, the main body 1 is generally composed of an image processing center, a monitor and a trolley, etc. The image processing center and the monitor are both placed on the trolley, and are electrically connected between the image processing center and the monitor. The image processing center processes image data and then displays the image through the monitor. All of these are prior arts here and will not be elaborated further. The detection signal at the probe 3 is transmitted to the main body 1 through the handle 2 and is displayed through the monitor after being processed. When not in use usually, the rotating sleeve 5 is assembled and arranged at the connection part between the handle 2 and the probe 3. When performing hole detection on an aerospace engine, the rotating sleeve 5 and the limiting sleeve 6 are moved to the opening of the detection position, and the clamping components are extended into the opening. By rotating the rotating sleeve 5 and the limiting sleeve 6 relative to each other, the clamping components can be controlled to drive relatively away from the center of the end face of the limiting sleeve 6, so as to gradually be clamped to the inner wall of the opening of the detection position. And because the probe 3 passes through the centers of the rotating sleeve 5 and the limiting sleeve 6, the probe 3 can be positioned at the center of the detection position due to the positioning of the clamping components. In this way, the probe 3 can extend into the detection position, and during this process, the probe 3 can reduce touching the inner wall of the detection hole, and the extension of the probe 3 is more stable. Moreover, further, after the probe 3 extends to the detection point, it can also be rotated to detect the inner wall of the entire hole. During this process, the end of the probe 3 can also avoid touching the inner wall, so as to avoid damage.

[0030] Such as Figures 2 - 8As shown, a through hole 51 is embedded in the center of one end of the rotating sleeve 5 toward the limiting sleeve 6, a threaded hole 52 is provided through the center of the through hole 51, an internal thread is tapped in the threaded hole 52, the inner diameter of the through hole 51 is larger than the inner diameter of the threaded hole 52, a flange is extended toward the limiting sleeve 6 from the edge of one side of the rotating sleeve 5 toward the limiting sleeve 6, and the flange is movably sleeved on the periphery of the limiting sleeve 6, a core tube 61 is provided through the center of the limiting sleeve 6, and the core tube 61 extends into the through hole 51, and an external threaded portion 21 threadably adapted to the threaded hole 52 is provided on the periphery of the connection position of the handle 2 and the probe 3. In this way, when not in use, the probe 3 passes through the threaded hole 52, the through hole 51 and the core tube 61 in sequence, and the threaded hole 52 and the external threaded portion 21 are threadedly connected, so as to facilitate the placement of the rotating sleeve 5 and the limiting sleeve 6. When it is needed, the rotating sleeve 5 is unscrewed from the external threaded portion 21, which can facilitate the relative movement of the probe 3, the rotating sleeve 5 and the limiting sleeve 6, and the rotating sleeve 5 and the limiting sleeve 6 can also be easily rotated relative to each other and moved closer or farther away from each other, which is simple and convenient to operate.

[0031] Furthermore, a plurality of balls 6101 are arranged in an annular array on the inner wall of the core tube 61, and the balls 6101 are movably embedded in the inner wall of the core tube 61, and the balls 6101 are distributed along the axial extension of the core tube 61. Such an arrangement facilitates the probe 3 to pass through, so that when the rotating sleeve 5 and the limiting sleeve 6 are positioned at the opening of the detection hole, the probe 3 can be flexibly extended in and out, and it is also convenient for the probe 3 to rotate to obtain a better detection angle.

[0032] The rotating sleeve 5 is embedded with an annular groove 53 on the side facing the limiting sleeve 6 and located outside the through hole 51. A ring gear 54 is fixedly arranged in the opening of the annular groove 53. A plurality of ratchet teeth 55 are arranged in the annular groove 53 behind the ring gear 54. The ratchet teeth 55 are rotatably connected to the inner side of the annular groove 53. A torsion spring is connected to the ratchet teeth 55 and the annular groove 53. The ratchet teeth 55 are arranged obliquely. The limiting sleeve 6 is rotatably embedded with a rotating ring 66 on the side facing the rotating sleeve 5. Internal gears 6601 are arranged on both the upper and lower sides of the rotating ring 66. The internal gear 6601 close to the rotating sleeve 5 is engaged with the ratchet teeth 55. When the ring gear 54 moves to align with the internal gear 6601, the ring gear 54 and the internal gear 6601 are correspondingly engaged. A spring is connected in the through hole 51, and the end of the spring is rotatably connected to the outer periphery of the core tube 61. In this way, the rotating sleeve 5 and the limiting sleeve 6 can rotate relative to each other, so that a one-way transmission is formed between the ratchet 55 and the inner gear 6601. When the rotating sleeve 5 is stretched away from the limiting sleeve 6, the spring is stretched, and the inner gear 6601 and the ring gear 54 can be engaged, so that the rotation between the rotating sleeve 5 and the limiting sleeve 6 can be bidirectionally transmitted. When the ratchet 55 and the inner gear 6601 form a one-way transmission, the clamping assembly can only be driven relatively away from the center of the limiting sleeve 6. In this way, when the clamping assembly is stuck in the detection position opening, it can only be further fixed and cannot be loosened, which can maintain the stable placement and also prevent the probe 3 from being loosened and falling due to accidental contact, thereby affecting the insertion and extraction of the probe 3.

[0033] Among them, Figure 2 , Figures 8 - 9 As shown, the end surface of the limiting sleeve 6 is located at the periphery of the core tube 61 and is embedded with multiple groups of strip grooves 62, and a clamping assembly is movably arranged in the strip groove 62. The internal gear 6601 located on the side away from the rotating sleeve 5 is transmission connected with the clamping assembly. In this way, when the rotating sleeve 5 is transmitted unidirectionally with the clamping assembly through the internal gear 6601, the rotation of the rotating sleeve 5 will only drive the clamping assembly away from the core tube 61, so that the clamping assembly will not loosen again after contacting the hole opening, avoiding the clamping assembly loosening due to problems such as accidental contact, thereby affecting the use of the probe 3. After the detection is completed, the rotating sleeve 5 is pulled in the direction away from the limiting sleeve 6, so that the ring gear 54 and the internal gear 6601 are in contact. At this time, bidirectional transmission can be achieved, so that the clamping assembly can be driven to approach the core tube 61 synchronously through the rotation of the rotating sleeve 5, so that the rotating sleeve 5 and the limiting sleeve 6 are removed from the opening of the hole. The overall operation is simple and convenient, and the clamping assembly moves synchronously, which is convenient for positioning the probe 3 at the center of the hole to avoid touching the inner wall of the hole. At the same time, the rotating sleeve 5 and the limiting sleeve 6 are stably placed, which is also more convenient when inserting and withdrawing the probe 3.

[0034] Among them, the clamping component includes a lead screw 63 rotatably connected in the strip-shaped groove 62. A transmission gear 65 is fixedly connected to the outer periphery of the end of the lead screw 63. The transmission gear 65 meshes and drives with the internal gear 6601. A clamping plate 64 is slidably connected in the strip-shaped groove 62. The end of the clamping plate 64 located in the strip-shaped groove 62 is threadedly sleeved and fitted on the outer periphery of the lead screw 63. When the rotating ring 66 rotates, the lead screw 63 can be driven to rotate through the transmission gear 65, so as to control the clamping plate 64 to slide in the strip-shaped groove 62, so that multiple clamping plates 64 can move synchronously, and then the contact positioning with the inner wall of the hole can be realized.

Claims

1. An endoscope for aerospace engine borehole detection, comprising a mainframe, the mainframe is provided with a handle connected by a wire, the handle is electrically connected with a probe, characterized in that: The peripheral movable assembly at the connection between the handle and the probe is connected with a positioning sleeve, and the positioning sleeve includes a rotating sleeve and a limit sleeve that are rotatably connected. The probe passes through the centers of the rotating sleeve and the limit sleeve, and a clamping component is embedded in the end face of the limit sleeve away from the rotating sleeve. The clamping components are distributed in an array with the end face center of the limit sleeve. When the rotating sleeve and the limit sleeve rotate relatively, multiple clamping components move synchronously relative to the center of the limit sleeve.

2. The aerospace engine borescope according to claim 1, characterized in that: A through hole is embedded in the center of one end of the rotating sleeve facing the limiting sleeve, a threaded hole is penetrated through the center of the through hole, the inner diameter of the through hole is larger than the inner diameter of the threaded hole, a flange is extended toward the limiting sleeve at one edge of the rotating sleeve facing the limiting sleeve, and the flange movable sleeve is arranged on the periphery of the limiting sleeve, a core tube is penetrated through the center of the limiting sleeve, and the core tube extends into the through hole.

3. The borescope for aerospace engine bore detection according to claim 2, characterized in that: An external threaded portion threadably matched with the threaded hole is disposed at the periphery of the connection position between the handle and the probe.

4. The borescope for aerospace engine bore detection according to claim 2, characterized in that: The inner wall of the core tube is provided with a plurality of balls in an annular array. The balls are movably embedded in the inner wall of the core tube and are distributed along the axial extension of the core tube.

5. The borescope for aerospace engine bore detection according to claim 2, characterized in that: The rotating sleeve is embedded with an annular groove on one side of the limiting sleeve and outside the through hole, a ring gear is fixedly sleeved in the opening of the annular groove, and a plurality of ratchet teeth are arranged behind the ring gear in the annular groove.

6. The borescope for aerospace engine bore detection according to claim 5, characterized in that: The ratchet is rotatably connected to the inner side of the annular groove, and a torsion spring is connected to the ratchet and the annular groove, and the ratchet is arranged obliquely.

7. The borescope for aerospace engine bore detection according to claim 5, characterized in that: The limiting sleeve is rotatably embedded in one side of the rotating sleeve to form a rotating ring. Internal gears are provided on both upper and lower sides of the rotating ring. The internal gear close to one side of the rotating sleeve is engaged and adapted with the ratchet.

8. The borescope for aerospace engine bore detection according to claim 7, characterized in that: When the ring gear moves to be aligned with the internal gear, the ring gear and the internal gear are correspondingly engaged, a spring is connected in the through hole, and the end of the spring is rotatably connected to the outer periphery of the core tube.

9. The borescope for aerospace engine bore detection according to claim 7, characterized in that: The end surface of the limiting sleeve is located at the periphery of the core tube and is embedded with a plurality of strip grooves. A clamping assembly is movably arranged in the strip groove. The internal gear located at the side away from the rotating sleeve is transmission-connected with the clamping assembly.

10. The borescope for aerospace engine bore detection according to claim 9, characterized in that: The clamping assembly includes a screw rod rotatably connected in the strip groove, a transmission gear is fixedly connected to the outer periphery of the end of the screw rod, the transmission gear is meshed with the internal gear for transmission, a clamping plate is slidably connected in the strip groove, and the end of the clamping plate located in the strip groove is threadedly sleeved on the outer periphery of the screw rod.

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