An endoscope for aerospace engine borescope

Abstract

The present invention discloses an endoscope for aerospace engine borescope inspection, which includes a main body. The main body is connected by a wire to a handle, and a probe is electrically connected to the handle. A positioning sleeve is movably assembled around the connection between the handle and the probe. The positioning sleeve includes a rotating sleeve and a limiting sleeve that are rotatably connected. The probe passes through the centers of the rotating sleeve and the limiting sleeve. A clamping component is embedded in the end face of the limiting sleeve away from the rotating sleeve. The clamping components are distributed in an array around the center of the end face of the limiting sleeve. When the rotating sleeve and the limiting sleeve rotate relative to each other, multiple clamping components move synchronously relative to the center of the limiting sleeve. In the present invention, the probe can reduce touching the inner wall of the detection hole, and the insertion of the probe is more stable. Moreover, further, after the probe reaches the detection point, it can 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, thereby avoiding damage.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and more particularly to an endoscope for detecting holes in a space engine. Background Art

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

[0003] Chinese Patent Publication No.: CN107561679A discloses an industrial endoscope, which includes a main body part, a connecting part and a probe part. The main body part is connected to the probe part through the connecting part. The probe part includes a lighting 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 lighting 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 extends into the hole at the detection position, it is very easy to continuously touch the inner wall of the hole during the extension process, and it is easier to collide with the inner wall of the hole when rotating the probe in the hole. The probe is very prone to wear problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an endoscope for detecting holes in a space engine to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An endoscope for detecting holes in a space engine includes a main unit. The main unit is connected with a handle through a wire, and a probe is electrically connected to the handle. A positioning sleeve is movably assembled around the connection between the handle and the probe. The positioning sleeve includes a rotating sleeve and a limiting sleeve that are rotatably connected. The probe passes through the centers of the rotating sleeve and the limiting sleeve. A clamping component is embedded in the end face of the limiting sleeve away from the rotating sleeve. The clamping components are distributed in an array around the center of the end face of the limiting sleeve. When the rotating sleeve and the limiting sleeve rotate relative to each other, a plurality of clamping components move synchronously relative to the center of the limiting sleeve.

[0008] As a further aspect of the present invention: A through hole is embedded in the center of the end of the rotating sleeve facing the limiting sleeve. A threaded hole runs 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 extends from the edge of the side of the rotating sleeve facing the limiting sleeve towards the limiting sleeve, and the flange is movably sleeved around the periphery of the limiting sleeve. A core tube runs through the center of the limiting sleeve, and the core tube extends into the through hole.

[0009] As a further solution of the present invention: an external thread portion threadedly adapted to the threaded hole is provided on the periphery of the connection position between the handle and the probe.

[0010] 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.

[0011] 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 provided behind the annular gear in the annular groove.

[0012] 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.

[0013] 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 provided on both the upper and lower sides inside the rotating ring, and the internal gear closer to the rotating sleeve is engaged and adapted to the ratchet teeth.

[0014] 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 engaged.

[0015] 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.

[0016] As a further solution of the present invention: multiple groups of strip-shaped grooves are embedded on the end face of the limiting sleeve on the periphery of the core tube, a clamping component is movably arranged in the strip-shaped grooves, and the internal gear on the side far from the rotating sleeve is in transmission connection with the clamping component.

[0017] 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.

[0018] 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 inspection 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, thereby avoiding damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention.

[0020] Figure 2 is a schematic structural diagram of the positioning sleeve in the present invention.

[0021] Figure 3 is Figure 1 an enlarged structural diagram of area A in

[0022] Figure 4 is a schematic structural diagram of the rotating sleeve in the present invention.

[0023] Figure 5 is a sectional view of the rotating sleeve in the present invention.

[0024] Figure 6 is Figure 4 an enlarged structural diagram of area B in

[0025] Figure 7 is Figure 5 an enlarged structural diagram of area C in

[0026] Figure 8 is a schematic structural diagram of the rotating ring in the present invention.

[0027] Figure 9 is a schematic structural diagram of the lead screw and the transmission gear in the present invention.

[0028] 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 mode

[0029] Please refer to Figures 1-3 , in the embodiment of the present invention, an endoscope for hole detection of an aerospace engine 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 centered on the center of the end face of the limiting sleeve 6, preferably in a cross-shaped distribution. When the rotating sleeve 5 and the limiting sleeve 6 rotate relative to each other, multiple clamping components synchronously move relative to the center of the end face of the limiting sleeve 6.

[0030] Specifically, the main body 1 is generally composed of an image processing center, a monitor, a trolley, etc. The image processing center and the monitor are both placed on the trolley. The image processing center and the monitor are electrically connected. The image processing center processes image data and then displays the image through the monitor. All of these are prior arts and will not be elaborated here. 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 the aerospace engine, the rotating sleeve 5 and the limiting sleeve 6 are moved to the opening of the detection location, 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 and move 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 location. 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 location due to the positioning of the clamping components. In this way, the probe 3 can extend into the detection location, 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, thereby avoiding damage.

[0031] Such as Figures 2-8As shown, the rotating sleeve 5 is embedded with a through hole 51 at the center of one end of the limiting sleeve 6, and a threaded hole 52 is provided through the center of the through hole 51. The threaded hole 52 is tapped with an internal thread. The inner diameter of the through hole 51 is larger than the inner diameter of the threaded hole 52. The rotating sleeve 5 has a flange extending toward the limiting sleeve 6 from one side edge thereof, 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. The outer periphery of the connection position of the handle 2 and the probe 3 is provided with an external threaded portion 21 threadably adapted to the threaded hole 52. 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, thereby facilitating the placement of the rotating sleeve 5 and the limiting sleeve 6. When 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. 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, making the operation simple and convenient.

[0032] Furthermore, a plurality of balls 6101 are provided in an annular array on the inner wall of the core tube 61. The balls 6101 are movably embedded in the inner wall of the core tube 61 and are distributed along the axial direction of the core tube 61. This arrangement facilitates the passage of the probe 3, thereby facilitating the flexible insertion and withdrawal of the probe 3 when the rotating sleeve 5 and the limiting sleeve 6 are positioned at the opening of the detection hole, and also facilitates the rotation of the probe 3 to obtain a better detection angle.

[0033] On one side of the rotating sleeve 5 facing the limiting sleeve 6, an annular groove 53 is embedded outside the through hole 51. A ring gear 54 is fixedly sleeved and arranged in the opening of the annular groove 53. A plurality of ratchet teeth 55 are arranged behind the ring gear 54 in the annular groove 53. The ratchet teeth 55 are rotatably connected to the inner side of the annular groove 53, and a torsion spring is connected between the ratchet teeth 55 and the annular groove 53. The ratchet teeth 55 are obliquely arranged. On one side of the limiting sleeve 6 facing the rotating sleeve 5, a rotating ring 66 is rotatably embedded. Inner gears 6601 are arranged on both the upper and lower sides inside the rotating ring 66. The inner gear 6601 closer to the rotating sleeve 5 is in clamping fit with the ratchet teeth 55. When the ring gear 54 moves to align with the inner gear 6601, the ring gear 54 and the inner gear 6601 are correspondingly clamped. A spring is connected in the through hole 51, and the end of the spring is rotatably connected to the 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 as to form a one-way transmission between the ratchet teeth 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 clamped, so that the rotation between the rotating sleeve 5 and the limiting sleeve 6 can be transmitted bidirectionally. When a one-way transmission is formed between the ratchet teeth 55 and the inner gear 6601, the clamping component can only be driven to move relatively away from the center of the limiting sleeve 6. In this way, when the clamping component is stuck at the opening of the detection position, it can only be further fixed and cannot be loosened, which can maintain stable placement and avoid loosening and falling due to accidental touch, thus affecting the insertion and extraction of the probe 3.

[0034] Among them, as Figure 2 , Figures 8-9 shown, on the end face of the limiting sleeve 6, a plurality of strip-shaped grooves 62 are embedded around the core tube 61. A clamping component is movably arranged in the strip-shaped grooves 62. The inner gear 6601 on the side away from the rotating sleeve 5 is in transmission connection with the clamping component. In this way, when the rotating sleeve 5 is in one-way transmission with the clamping component through the inner gear 6601, the rotation of the rotating sleeve 5 will only drive the clamping component away from the core tube 61. Thus, after the clamping component contacts the hole opening, it will not loosen again, avoiding the loosening of the clamping component due to problems such as accidental touch, which affects 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 inner gear 6601 are in contact. At this time, the two-way transmission can be achieved, so that the rotation of the rotating sleeve 5 can drive the clamping component to move synchronously closer to the core tube 61, so as to remove the rotating sleeve 5 and the limiting sleeve 6 from the opening of the hole. The overall operation is simple and convenient, and the clamping component moves synchronously, which is convenient to position the probe 3 at the center of the hole, avoiding touching the inner wall of the hole. At the same time, the placement of the rotating sleeve 5 and the limiting sleeve 6 is stable, and it is more convenient to insert and extract the probe 3.

[0035] 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 periphery of the end of the lead screw 63. The transmission gear 65 is meshed and driven 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 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 a plurality of 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 borescope inspection, comprising a main unit, the main unit is connected with a handle through a wire, and a probe is electrically connected to the handle, characterized in that, The peripheral movable assembly of the connection between the handle and the probe is connected to a positioning sleeve, the positioning sleeve includes a rotating sleeve and a limiting sleeve that are rotatably connected, the probe passes through the center of the rotating sleeve and the limiting sleeve, and the end face of the limiting sleeve away from the rotating sleeve is embedded with a clamping assembly, the clamping assembly is distributed in an array with the end face center of the limiting sleeve, when the rotating sleeve and the limiting sleeve rotate relative to each other, multiple clamping assemblies move synchronously relative to the center of the limiting sleeve; The rotating sleeve is embedded with a through hole at the center of one end facing the limiting sleeve, a threaded hole is provided 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, and the flange is movably sleeved on the periphery of the limiting sleeve, a core tube is provided through the center of the limiting sleeve, and the core tube extends into the through hole; The rotating sleeve is embedded with an annular groove on the side facing the limiting sleeve and outside the through hole, a ring gear is fixedly mounted in the opening of the annular groove, and a plurality of ratchet teeth are arranged behind the ring gear in the annular groove; 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; The limiting sleeve is rotatably embedded in one side of the rotating sleeve and is provided with a rotating ring. The upper and lower sides of the rotating ring are provided with internal gears. The internal gear close to the rotating sleeve is engaged with the ratchet. 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.

2. The endoscope for aerospace engine borescope according to claim 1, characterized in that, An external threaded portion that is threadably matched with the threaded hole is provided on the periphery of the connection position between the handle and the probe.

3. An endoscope for aerospace engine borescope according to claim 1, 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.

4. An endoscope for aerospace engine borescope according to claim 1, characterized in that, The end surface of the limiting sleeve is located on the periphery of the core tube and is embedded with multiple groups of strip grooves. A clamping assembly is movably provided in the strip groove. The internal gear located on the side away from the rotating sleeve is transmission-connected with the clamping assembly.

5. An endoscope for aerospace engine borescope according to claim 4, characterized in that, The clamping assembly includes a screw rod rotatably connected in the strip groove, a transmission gear is fixedly connected to the periphery of the end of the screw rod, the transmission gear is meshed with the internal gear for transmission, and a clamping plate is slidingly connected in the strip groove, and the end of the clamping plate located in the strip groove is threadedly sleeved on the periphery of the screw rod.

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