Endoscopic inspection equipment for internal faults of hydraulic cylinder of engineering machinery

Abstract

The invention belongs to the technical field of hydraulic cylinder detection, and particularly relates to engineering machinery hydraulic cylinder internal fault endoscopy equipment which comprises a receiver, and a picture screen is arranged on the front face of the receiver; and the paying-off winding drum is installed on the right side of the receiver, a connecting wire is arranged in the paying-off winding drum, one end of the connecting wire extends out of the paying-off winding drum, and the other end of the connecting wire is fixedly connected with an inner cavity of the receiver. In order to avoid the problem that the observation work is influenced by the fact that the mirror surface of the detection lens is easily attached to engine oil due to the fact that the detection lens is in contact with the inner wall of the hydraulic cylinder in the sliding process, the sliding sleeve shell capable of sliding is arranged on the outer surface of the detection lens, and the protection effect is achieved under the condition that observation of the detection lens is not interfered; and the detection lens is contacted with the inner wall of the hydraulic cylinder in advance, so that the lens is ensured not to be contacted with the inner wall of the hydraulic cylinder when the detection lens slides out, and the problem that the lens surface of the detection lens is polluted is effectively prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic cylinder detection, and specifically relates to an endoscope inspection device for internal faults of construction machinery hydraulic cylinders. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion. Since most construction machinery operates outdoors, the working environment is relatively harsh, the load changes are relatively complex, and the vibration and impact are large, which easily leads to failures of the hydraulic cylinders of construction machinery. Therefore, as a key core component of the construction machinery hydraulic system, regular maintenance and repair of the hydraulic cylinders have become an essential task during the use of construction machinery. When performing maintenance and repair operations on the hydraulic cylinders, since their disassembly is usually cumbersome and difficult, an endoscope can be used to scan and detect the interior of the cylinder block, so as to judge the fault location and degree inside the hydraulic cylinder and perform targeted treatment work.

[0003] Since there is a lot of oil stain inside the hydraulic cylinder to be detected, when directly inserting the endoscope into the hydraulic cylinder, it is very easy for the lens of the endoscope to come into contact with the inner wall of the hydraulic cylinder, resulting in oil stain adhering to the outer surface of the endoscope lens, causing the captured image to be unclear, and the lens cleaning is very troublesome, etc. Therefore, improvements are needed. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the technical solution adopted by the present invention to solve its technical problems is: an endoscope inspection device for internal faults of construction machinery hydraulic cylinders, including:

[0005] A receiver, on the front surface of which a display screen is provided;

[0006] A wire-reeling drum, which is installed on the right side of the receiver. A connecting wire is arranged inside the wire-reeling drum, and one end of the connecting wire extends to the outside of the wire-reeling drum, and the other end of the connecting wire is fixedly connected to the inner cavity of the receiver. The connecting wire is relatively long, and most of the connecting wire is wound inside the wire-reeling drum.

[0007] The connecting wire includes:

[0008] A detection lens, which is installed at the end of the connecting wire away from the receiver;

[0009] A protection component, which is sleeved outside the detection lens to block the detection lens;

[0010] A lead component, which can drive the connecting wire to slide.

[0011] Further, the protection component includes

[0012] A sliding sleeve housing, the outer surface of the sliding sleeve housing being sleeved on one end of the outer surface of the connecting wire away from the receiver;

[0013] A fixed collar, the center of the inner wall of the fixed collar being snap-fitted on the outer surface of the connecting wire;

[0014] A compression sleeve, one end of the compression sleeve being fixedly connected to the left side of the outer surface of the sliding sleeve housing, and the other end of the compression sleeve being fixedly connected to the right side of the outer surface of the fixed collar;

[0015] A control inflation ring, the control inflation ring being installed on the left side of the outer surface of the fixed collar, the air outlet of the control inflation ring being inserted into the inner cavity of the fixed collar through a through groove, and the air outlet of the control inflation ring extending into the interior of the compression sleeve. When the control inflation ring evacuates and reduces the pressure inside the compression sleeve, the compression sleeve will contract, thereby pulling the sliding sleeve housing to slide along the outer surface of the connecting wire towards the side close to the fixed collar;

[0016] A covering component, the covering component completely covering the end part of the detection lens.

[0017] Further, the covering component includes,

[0018] An adhering outer ring, the adhering outer ring being arranged on the side of the inner cavity of the sliding sleeve housing away from the compression sleeve through a cutting groove, and guiding rotating grooves being symmetrically arranged on the upper and lower sides of the inner wall of the adhering outer ring;

[0019] A sectional sleeve housing, the inner wall of the sectional sleeve housing being uniformly provided with cleaning brushes, the outer surface of the sectional sleeve housing being rotatably connected through a rotating ball groove with a rotating joint, the inner cavity of the sectional sleeve housing being a hollow structure. By adding a maintenance liquid into the inner cavity of the sectional sleeve housing through the rotating joint, it can penetrate to the outer surface of the cleaning brushes. After the upper and lower sectional sleeve housings are butted, the arc-shaped lens of the detection lens can be completely wrapped;

[0020] A guiding rotating rod, a communicating inner tube being arranged at the center of the inner cavity of the guiding rotating rod, the bottom end of the guiding rotating rod being inserted into the inner cavity of the rotating joint, the top end of the communicating inner tube extending outside the adhering outer ring, the bottom end of the communicating inner tube being communicated with the inner cavity of the sectional sleeve housing, and the end of the guiding rotating rod away from the sectional sleeve housing being rotatably connected to the inner wall of the guiding rotating groove;

[0021] A reset spring band, one end of the reset spring band being fixedly connected to the outer surface of the guiding rotating rod, and the other end of the reset spring band being fixedly connected to the inner wall of the adhering outer ring;

[0022] Through the external interface of the adhering outer ring, the maintenance liquid can be directly injected into the communicating inner tube, and then the cleaning brushes are wetted. The sectional sleeve housing is sleeved on the mirror end of the detection lens to carry out the cleaning and maintenance work on the detection lens.

[0023] Furthermore, the lead component includes

[0024] a guiding sleeve, the axis of the inner wall of the guiding sleeve is sleeved with the outer surface of the connecting wire;

[0025] a wire pulling component, which can drive the connecting wire into the interior of the hydraulic cylinder and can also retract the connecting wire from the hydraulic cylinder;

[0026] a docking chuck, which is installed on the right side of the guiding sleeve and can be installed at the opening of the hydraulic cylinder.

[0027] Furthermore, the wire pulling component includes

[0028] concave roller shafts, the number of the concave roller shafts is two, and the middle of the outer surface of the concave roller shafts is in rolling connection with the outer surface of the connecting wire;

[0029] a control motor, the outer surface of the output shaft of the control motor is inserted into the axis of the inner cavity of the concave roller shaft. When the control motor drives the concave roller shaft to roll, it can drive the connecting wire to slide relative to the guiding sleeve through rolling friction, and then the wire pay-off reel cooperates to carry out wire pay-off and wire rewinding work;

[0030] a connecting guide plate, both ends of the connecting guide plate are fixedly connected to the inner cavities of the upper and lower control motors through power supply ports respectively, and a wiring head is arranged in the middle of the connecting guide plate. The outer surface of the wiring head is fixedly connected to the inner cavity of the guiding sleeve through a through hole. Power is supplied from an external docking wire head, and the connecting guide plate distributes the current to the control motors on both sides.

[0031] Furthermore, the docking chuck includes

[0032] an expansion disc shell, guiding chutes are evenly arranged in the inner cavity of the expansion disc shell;

[0033] a pressing slide rod, the outer surface of the pressing slide rod is slidably connected to the inner cavity of the expansion disc shell through the guiding chute, and a tension spring belt is arranged on the outer surface of the pressing slide rod. After the ends of the pressing slide rod penetrating through the right side of the expansion disc shell are concentrated and joined together, the opening of the hydraulic cylinder can be clamped, so that the lead component is simply fixed;

[0034] a traction machine, a tension rope is arranged at the axis of the inner cavity of the traction machine, and one end of the tension rope far away from the traction machine is fixedly connected to the inner cavity of the pressing slide rod. The traction machine contracts the tension rope through the internal rotating shaft, and then the tension rope pulls the pressing slide rod.

[0035] The beneficial effects of the present invention are as follows:

[0036] 1. To avoid the problem that the detection lens contacts the inner wall of the hydraulic cylinder during the sliding process, causing the mirror surface of the detection lens to be easily attached with engine oil and affecting the observation work, a slidable sliding housing is provided on the outer surface of the detection lens. Without interfering with the observation of the detection lens, it plays a protective role and contacts the inner wall of the hydraulic cylinder in advance, ensuring that the lens will surely not contact the inner wall of the hydraulic cylinder when the detection lens slides out, thereby effectively preventing the problem of the mirror surface of the detection lens being contaminated.

[0037] 2. Under normal circumstances, the outer diameter of the compression sleeve of the protection component is relatively large, and the compression sleeve itself has a certain elasticity. Therefore, when the detection lens part collides with the outside, the compression sleeve can absorb most of the impact force, and the detection lens can be buffered by the cleaning brush to prevent the mirror surface part from being broken due to the impact force. Therefore, the detection lens provided with the protection component is safer during the handling operation of the device and will not be easily damaged due to the swinging of the connecting wire.

[0038] 3. The device can observe the inside of the hydraulic cylinder by inserting a connecting wire into the hydraulic cylinder and using the detection lens at the end to obtain the internal picture of the hydraulic cylinder, accurately judge the service life and fault problems of the hydraulic cylinder. Since each time the detection lens is retracted into the inside of the sliding housing, the profile sleeves on both sides can not only completely wrap the end part of the detection lens, but also can maintain the mirror surface part of the detection lens through the cleaning brush on the inner wall, thereby extending the service life of the lens and preventing the problem that the detection lens is attached with dust and impurities resulting in blurred picture imaging.

[0039] 4. When manually performing the wire releasing operation, the operator needs to hold the receiver while performing the wire releasing operation, which is very inconvenient. Therefore, a docking chuck is provided so that the lead component of the connecting wire can be simply fixed at the opening part of the hydraulic cylinder, and then the automatic wire releasing work is carried out through the lead component, enabling the operator to concentrate on observing the internal situation of the hydraulic cylinder on the display screen. And the expansion disk housing can block the through port of the hydraulic cylinder to prevent the engine oil smell inside the expansion disk housing from diffusing into the external air, optimizing the working environment of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is the front view of the present invention;

[0041] Figure 2 is the cross-sectional view of the present invention;

[0042] Figure 3 is the cross-sectional view of the protection component of the present invention;

[0043] Figure 4 is the cross-sectional view of the covering component of the present invention;

[0044] Figure 5 is a cross-sectional view of the lead component of the present invention;

[0045] Figure 6 is a schematic structural diagram of the wire pulling component of the present invention;

[0046] Figure 7 is a cross-sectional view of the docking chuck of the present invention.

[0047] In the figure: 1, receiver; 2, display screen; 3, wire pay-off reel; 4, connecting wire; 5, detection lens; 6, protection component; 7, lead component; 61, sliding sleeve; 62, compression sleeve; 63, fixed collar; 64, control inflation ring; 8, covering component; 81, wall-adhering outer ring; 82, guiding rotating groove; 83, communicating inner tube; 84, guiding rotating rod; 85, reset spring band; 86, sectional sleeve; 87, cleaning brush; 88, rotating joint; 71, guiding sleeve; 72, wire pulling component; 9, docking chuck; 721, connecting guide plate; 722, terminal; 723, control motor; 724, concave roller; 91, expanding disk housing; 92, pressing slide bar; 93, tension spring band; 94, tension rope; 95, tractor. Detailed implementation manners

[0048] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0049] Embodiment 1, please refer to Figures 1-4 , the present invention provides a technical solution: an endoscope inspection device for internal faults of a construction machinery hydraulic cylinder, including:

[0050] A receiver 1, and a display screen 2 is arranged on the front surface of the receiver 1;

[0051] A wire pay-off reel 3, the wire pay-off reel 3 is installed on the right side of the receiver 1, a connecting wire 4 is arranged inside the wire pay-off reel 3, and one end of the connecting wire 4 extends to the outside of the wire pay-off reel 3, and the other end of the connecting wire 4 is fixedly connected to the inner cavity of the receiver 1. The connecting wire 4 is relatively long, and most of the connecting wire 4 is wound inside the wire pay-off reel 3.

[0052] The connecting wire 4 includes:

[0053] A detection lens 5, and the detection lens 5 is installed at one end of the connecting wire 4 away from the receiver 1;

[0054] A protective component 6 is sleeved outside the detection lens 5 to shield the detection lens 5;

[0055] A lead component 7 can drive the connecting wire 4 to slide.

[0056] The protective component 6 includes

[0057] A sliding sleeve 61, the outer surface of the sliding sleeve 61 is sleeved with one end of the outer surface of the connecting wire 4 away from the receiver 1;

[0058] A fixed collar 63, the axis at the inner wall of the fixed collar 63 is clamped on the outer surface of the connecting wire 4;

[0059] A compression sleeve 62, one end of the compression sleeve 62 is fixedly connected to the left side of the outer surface of the sliding sleeve 61, and the other end of the compression sleeve 62 is fixedly connected to the right side of the outer surface of the fixed collar 63;

[0060] A control inflation ring 64 is installed on the left side of the outer surface of the fixed collar 63. The air outlet of the control inflation ring 64 is inserted into the inner cavity of the fixed collar 63 through a through groove, and the air outlet of the control inflation ring 64 extends into the inside of the compression sleeve 62. When the control inflation ring 64 evacuates and depressurizes the inside of the compression sleeve 62, the compression sleeve 62 will contract, thereby pulling the sliding sleeve 61 to slide along the outer surface of the connecting wire 4 towards the side close to the fixed collar 63;

[0061] A covering component 8 completely covers the end part of the detection lens 5.

[0062] The covering component 8 includes

[0063] An adhering outer ring 81 is arranged on the side of the inner cavity of the sliding sleeve 61 away from the compression sleeve 62 through a cut groove. Guide rotating grooves 82 are symmetrically arranged on the upper and lower sides of the inner wall of the adhering outer ring 81;

[0064] A sectional sleeve 86, cleaning brushes 87 are evenly arranged on the inner wall of the sectional sleeve 86. The outer surface of the sectional sleeve 86 is connected by a rotating ball groove with a rotating joint 88. The inner cavity of the sectional sleeve 86 is a hollow structure. By adding a maintenance liquid to the inner cavity of the sectional sleeve 86 through the rotating joint 88, it can penetrate to the outer surface of the cleaning brushes 87. After the sectional sleeves 86 on the upper and lower sides are butted, the arc-shaped lens of the detection lens 5 can be completely wrapped;

[0065] The guiding rotating rod 84 is provided with a communicating inner tube 83 at the axis of its inner cavity. The bottom end of the guiding rotating rod 84 is inserted into the inner cavity of the rotating joint 88. The top end of the communicating inner tube 83 extends to the outside of the wall-attaching outer ring 81. The bottom end of the communicating inner tube 83 communicates with the inner cavity of the sectional housing 86. One end of the guiding rotating rod 84 away from the sectional housing 86 is rotatably connected to the inner wall of the guiding rotating groove 82;

[0066] The reset spring band 85, one end of the reset spring band 85 is fixedly connected to the outer surface of the guiding rotating rod 84, and the other end of the reset spring band 85 is fixedly connected to the inner wall of the wall-attaching outer ring 81;

[0067] Through the external interface of the wall-attaching outer ring 81, the maintenance liquid can be directly injected into the communicating inner tube 83, and then the cleaning brush 87 is wetted. The sectional housing 86 is sleeved with the mirror end of the detection lens 5 to perform the cleaning and maintenance work on the detection lens 5.

[0068] When using this device to work, the operator holds the receiver 1, inserts the end of the detection lens 5 into the inside of the hydraulic cylinder, and then uses the lead component 7 to clip at the inlet of the hydraulic cylinder to complete the preparation work.

[0069] The operator continuously inserts the connecting wire 4 into the deep part of the hydraulic cylinder by using the lead component 7 outside, and then the wire-reeling drum 3 cooperates to perform the wire-reeling action. When the detection lens 5 moves inside the hydraulic cylinder, it is always retracted inside the sliding housing 61, so the sliding housing 61 contacts the inner wall of the hydraulic cylinder. When it is necessary for the detection lens 5 to photograph the internal environment of the hydraulic cylinder, the operator outside remotely controls the control inflation ring 64 on the fixed collar 63 to pump the inside of the compression sleeve 62. At this time, the compression sleeve 62 contracts due to the decrease in pressure inside. And because the fixed collar 63 is fixed to the connecting wire 4, the contracting compression sleeve 62 will pull the sliding housing 61 to slide along the outer surface of the connecting wire 4 towards the side close to the fixed collar 63. At this time, the detection lens 5 inside the sliding housing 61 will slide out and will not contact the inner wall of the hydraulic cylinder. Subsequently, the detection lens 5 performs the photographing work on the inner wall of the hydraulic cylinder, transmits the signal to the receiver 1 through the connecting wire 4, and the operator observes the picture through the display screen 2. After the observation is completed, then it is necessary to continue to push the detection lens 5. At this time, the control inflation ring 64 restores the pressure inside the compression sleeve 62 by pressurization, the compression sleeve 62 is restored to its original state, and the sliding housing 61 is pushed back to the initial position to cover the detection lens 5 again.

[0070] When the sliding sleeve 61 slides towards the side close to the fixed collar 63, the detection lens 5 will push up the profile sleeves 86 on both sides. At this time, the profile sleeve 86 drives the guiding rotating rod 84 to rotate along the guiding groove 82, and the mirror end of the detection lens 5 slides out from the inside of the sliding sleeve 61. When the detection lens 5 retracts back into the inside of the sliding sleeve 61 again, the guiding rotating rods 84 on both sides will reset under the elastic force of the reset spring belt 85, and then the profile sleeves 86 on both sides will merge to completely cover the end part of the detection lens 5, and the cleaning brush 87 inside will perform maintenance work on the mirror end of the detection lens 5.

[0071] Example 2, please refer to Figures 1-7 , the present invention provides a technical solution: on the basis of Example 1, the lead component 7 includes,

[0072] The guiding sleeve 71, the axis of the inner wall of the guiding sleeve 71 is sleeved with the outer surface of the connecting wire 4;

[0073] The wire pulling component 72, the wire pulling component 72 can drive the connecting wire 4 into the inside of the hydraulic cylinder and can also retract the connecting wire 4 from the hydraulic cylinder;

[0074] The docking chuck 9, the docking chuck 9 is installed on the right side of the guiding sleeve 71, and the docking chuck 9 can be installed at the opening of the hydraulic cylinder.

[0075] The wire pulling component 72 includes,

[0076] The concave roller shafts 724, the number of the concave roller shafts 724 is two, and the middle of the outer surface of the concave roller shafts 724 is in rolling connection with the outer surface of the connecting wire 4;

[0077] The control motor 723, the outer surface of the output shaft of the control motor 723 is inserted into the axis of the inner cavity of the concave roller shaft 724. When the control motor 723 drives the concave roller shaft 724 to roll, it can drive the connecting wire 4 to slide relative to the guiding sleeve 71 through the rolling friction force, and then the wire winding reel 3 cooperates to perform wire releasing and wire winding work;

[0078] The connecting guide plate 721, both ends of the connecting guide plate 721 are fixedly connected to the inner cavities of the upper and lower control motors 723 through the power supply ports respectively, and a connection terminal 722 is arranged in the middle of the connecting guide plate 721. The outer surface of the connection terminal 722 is fixedly connected to the inner cavity of the guiding sleeve 71 through the through port. Power is supplied to the connection terminal 722 from the outside, and the connecting guide plate 721 distributes the current to the control motors 723 on both sides.

[0079] The docking chuck 9 includes,

[0080] The expansion disc housing 91, guiding sliding grooves are evenly arranged in the inner cavity of the expansion disc housing 91;

[0081] Press the sliding rod 92. The outer surface of the sliding rod 92 is slidably connected to the inner cavity of the expansion disc housing 91 through a guiding chute. A tension spring band 93 is provided on the outer surface of the sliding rod 92. After the right end of the sliding rod 92 passes through the expansion disc housing 91 and the ends are concentrated and joined together, the opening of the hydraulic cylinder can be clamped, so that the lead component 7 is simply fixed;

[0082] Tractor 95. A tension rope 94 is provided at the axis of the inner cavity of the tractor 95. One end of the tension rope 94 away from the tractor 95 is fixedly connected to the inner cavity of the sliding rod 92. The tractor 95 contracts the tension rope 94 through the internal rotating shaft, and then the tension rope 94 pulls the sliding rod 92.

[0083] When setting the lead component 7, all the tractors 95 are started simultaneously through an external remote control. The tractors 95 contract the tension ropes 94, pulling all the sliding rods 92 towards the side close to the tractors 95. Then, the opening part of the hydraulic cylinder is aligned with the axis of the expansion disc housing 91. Subsequently, the tension of the tractors 95 is released. Each sliding rod 92 will slide directionally towards the position close to the axis under the thrust of the tension spring band 93. Subsequently, the end part of the sliding rod 92 will squeeze against the edge part of the hydraulic press inlet, thereby simply fixing the docking chuck 9.

[0084] When carrying out the wire releasing work, the control motor 723 drives the concave roller 724 to rotate under the action of an external remote control, that is, the upper concave roller 724 rotates counterclockwise, and the lower concave roller 724 rotates clockwise. At the same time, the wire releasing reel 3 cooperates to carry out the wire releasing action, so as to continuously insert the connecting wire 4 into the internal part of the hydraulic cylinder, push the detection lens 5 to move inside the hydraulic cylinder. After the detection work is completed, the connecting wire 4 is retracted, the wire releasing reel 3 cooperates to carry out the wire winding action, and the docking chuck 9 can be removed.

[0085] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. An endoscope inspection device for internal faults of a construction machinery hydraulic cylinder, comprising: A receiver (1), on the front of which there is an imaging screen (2); A wire-releasing reel (3), which is installed on the right side of the receiver (1). Inside the wire-releasing reel (3), there is a connecting wire (4), and one end of the connecting wire (4) extends to the outside of the wire-releasing reel (3), and the other end of the connecting wire (4) is fixedly connected to the inner cavity of the receiver (1); It is characterized in that: the connecting wire (4) includes: A detection lens (5), which is installed at one end of the connecting wire (4) far from the receiver (1); A protection component (6), which is sleeved outside the detection lens (5) to block the detection lens (5); A lead component (7), which can drive the connecting wire (4) to slide.

2. The endoscope inspection device for internal faults of a construction machinery hydraulic cylinder according to claim 1, wherein: The protection component (6) includes, A sliding sleeve (61), the outer surface of which is sleeved on the outer surface of the connecting wire (4) at the end far from the receiver (1); A fixed collar (63), the axis of the inner wall of which is clamped on the outer surface of the connecting wire (4); A compression sleeve (62), one end of which is fixedly connected to the left side of the outer surface of the sliding sleeve (61), and the other end of which is fixedly connected to the right side of the outer surface of the fixed collar (63); A control inflation ring (64), which is installed on the left side of the outer surface of the fixed collar (63). The air outlet of the control inflation ring (64) is inserted into the inner cavity of the fixed collar (63) through a through groove, and the air outlet of the control inflation ring (64) extends into the inside of the compression sleeve (62); A covering component (8), which completely covers the end part of the detection lens (5).

3. The endoscope inspection device for internal faults of a construction machinery hydraulic cylinder according to claim 2, characterized in that: The covering component (8) includes, A wall-attached outer ring (81), which is arranged on the side of the inner cavity of the sliding sleeve (61) far from the compression sleeve (62) through a cutting groove. On the upper and lower sides of the inner wall of the wall-attached outer ring (81), guiding rotating grooves (82) are symmetrically arranged; A sectional sleeve (86), on the inner wall of which cleaning brushes (87) are uniformly arranged. The outer surface of the sectional sleeve (86) is connected by a rotating joint (88) through a rotating ball groove. The inner cavity of the sectional sleeve (86) is a hollow structure. By adding a maintenance liquid to the inner cavity of the sectional sleeve (86) through the rotating joint (88), it can penetrate to the outer surface of the cleaning brushes (87); A guiding rotating rod (84), at the axis of the inner cavity of which there is a communicating inner tube (83). The bottom end of the guiding rotating rod (84) is inserted into the inner cavity of the rotating joint (88). The top end of the communicating inner tube (83) extends to the outside of the wall-attached outer ring (81). The bottom end of the communicating inner tube (83) is communicated with the inner cavity of the sectional sleeve (86). The end of the guiding rotating rod (84) far from the sectional sleeve (86) is rotatably connected to the inner wall of the guiding rotating groove (82); A reset spring band (85), one end of the reset spring band (85) is fixedly connected to the outer surface of the guiding rotating rod (84), and the other end of the reset spring band (85) is fixedly connected to the inner wall of the wall-attached outer ring (81).

4. The endoscope inspection device for internal faults of a construction machinery hydraulic cylinder according to claim 1, wherein: The lead component (7) includes A guiding sleeve (71), the axis of the inner wall of the guiding sleeve (71) is sleeved with the outer surface of the connecting wire (4); A wire pulling component (72), the wire pulling component (72) can drive the connecting wire (4) into the interior of the hydraulic cylinder and can also retract the connecting wire (4) from the hydraulic cylinder; A docking chuck (9), the docking chuck (9) is installed on the right side of the guiding sleeve (71), and the docking chuck (9) can be installed at the opening of the hydraulic cylinder.

5. The endoscope inspection device for internal faults of construction machinery hydraulic cylinders according to claim 4, characterized in that: The wire pulling component (72) includes Concave roller shafts (724), the number of the concave roller shafts (724) is two, and the middle of the outer surface of the concave roller shafts (724) is in rolling connection with the outer surface of the connecting wire (4); A control motor (723), the outer surface of the output shaft of the control motor (723) is inserted into the axis of the inner cavity of the concave roller shaft (724); A connecting guide plate (721), both ends of the connecting guide plate (721) are fixedly connected to the inner cavities of the upper and lower control motors (723) through power supply ports respectively, and a wiring head (722) is arranged in the middle of the connecting guide plate (721). The outer surface of the wiring head (722) is fixedly connected to the inner cavity of the guiding sleeve (71) through a through port. Power is supplied to the external docking wiring head (722), and the connecting guide plate (721) distributes the current to the control motors (723) on both sides.

6. The endoscopic inspection device for internal faults of a construction machinery hydraulic cylinder according to claim 4, characterized in that: The docking chuck (9) includes An expansion disc shell (91), guiding sliding grooves are uniformly arranged in the inner cavity of the expansion disc shell (91); A pressing sliding rod (92), the outer surface of the pressing sliding rod (92) is slidably connected to the inner cavity of the expansion disc shell (91) through the guiding sliding groove, and a tension spring band (93) is arranged on the outer surface of the pressing sliding rod (92); A tractor (95), a tension rope (94) is arranged at the axis of the inner cavity of the tractor (95), one end of the tension rope (94) away from the tractor (95) is fixedly connected to the inner cavity of the pressing sliding rod (92), and the tractor (95) contracts the tension rope (94) through the internal rotating shaft, and then the tension rope (94) pulls the pressing sliding rod (92).

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