Flexible cleaning device for oil duct hole of engine cylinder body

Abstract

The invention belongs to the technical field of engine cleaning equipment, and particularly relates to an engine cylinder body oil duct hole flexible cleaning device which comprises a workbench and an engine cylinder body part placed on the workbench, and a plurality of oil duct holes are formed in the engine cylinder body part; the cleaning mechanism comprises a first servo motor which is fixedly installed on the side face of the workbench and provided with a first lead screw, and the first lead screw is movably connected with a first movable block; the connecting frame is fixedly connected with the first movable block, a second servo motor with a second lead screw is fixedly installed in the connecting frame, and the second lead screw is movably connected with a second movable block; by means of the designed structure, rapid flushing operation can be conducted on the oil duct hole of the engine cylinder part, and the liquid conveying pipe made of the flexible material can effectively prevent the inner wall of the oil duct hole from being scratched while being matched with the bending path of the oil duct hole.

Description

Technical Field

[0001] This invention relates to the field of engine cleaning equipment technology, specifically a flexible cleaning device for engine cylinder block oil passage holes. Background Technology

[0002] Engine block oil passages are precision, tiny internal channels formed during the casting and machining processes of the engine block. As a core component of the engine lubrication system, they are specifically designed to deliver engine lubricating oil (engine oil). Through a pre-defined oil passage route, the oil is stably and continuously delivered to high-speed, high-load frictional moving parts such as the crankshaft, connecting rod bearings, pistons, camshafts, and valves, providing them with lubrication, friction reduction, cooling, and rust prevention protection. It is a key structure for ensuring the normal operation of various friction pairs in the engine and extending the overall service life of the engine.

[0003] Engine block oil passages are not only small in diameter, but their overall structure is also complex, often winding, elongated, and circuitous. They frequently contain irregular through holes, blind holes, intersecting holes, and uneven inner walls formed by casting, resulting in a complex structure and limited space. Traditional cleaning equipment often uses rigid cleaning tools made of metal, which cannot flexibly adapt to the winding paths and confined spaces of the oil passages. During cleaning, these tools are prone to problems such as jamming, scratching the precision inner walls of the oil passages, and failing to clean hard-to-reach areas. They cannot thoroughly remove impurities such as iron filings, molding sand, and oil stains, and can also damage the dimensional accuracy and surface quality of the oil passages. Therefore, a flexible cleaning device for engine block oil passages is proposed to address these issues. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a flexible cleaning device for engine cylinder oil passage holes.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: The engine cylinder block oil passage hole flexible cleaning device of the present invention includes a workbench and an engine cylinder block component placed on the workbench, and the engine cylinder block component has a plurality of oil passage holes; it also includes: a cleaning mechanism, including a first servo motor fixedly installed on the side of the workbench and having a first lead screw, and a first movable block movably connected to the first lead screw; a connecting frame fixedly connected to the first movable block, and a second servo motor having a second lead screw fixedly installed inside the connecting frame, and a second movable block movably connected to the second lead screw; an electric push rod fixedly installed at the bottom of the second movable block, and the output end of the electric push rod is connected to an infusion tube through a connecting plate; a storage box containing cleaning fluid is fixedly installed on the connecting frame, the storage box has a built-in micro pump, and one end of the infusion tube is connected to the micro pump.

[0006] Furthermore, a flexible mechanism is provided on the output end of the electric push rod. The flexible mechanism includes a sleeve, one end of which is movably connected to a hollow ball head. The sleeve and the ball head form a group, and several groups are provided below the connecting plate. The infusion tube passes through several sleeves and ball heads.

[0007] Furthermore, the surface of the sleeve is provided with several staggered connecting tubes that communicate with the inside of the infusion tube, and a filter screen is fixedly installed inside the connecting tube.

[0008] Furthermore, several arc-shaped guide plates are fixedly installed inside the infusion tube, with the guide plates located near the connecting tube.

[0009] Furthermore, two symmetrically arranged arc-shaped guide plates are fixedly installed at one end of the sleeve, and several rolling balls are wedged on the surface of the guide plates.

[0010] Furthermore, the interior of the connecting pipe is provided with a clearing component, which includes a rotating plate rotatably connected to the interior of the connecting pipe via a torsion spring. A first electromagnet is fixedly installed on one side of the rotating plate, and a second electromagnet is fixedly installed inside the connecting pipe.

[0011] Furthermore, a conical unblocking rod is fixedly installed on the rotating plate, and a rubber impact ball is fixedly installed on the surface of the unblocking rod.

[0012] Furthermore, the connecting frame is provided with a support mechanism, which includes a support block fixed to the bottom of the connecting frame and sliding within a groove in the worktable.

[0013] Furthermore, arc-shaped cleaning plates are fixedly installed on both sides of the support block, and auxiliary balls are wedged on both sides of the support block.

[0014] Furthermore, a protective mechanism is provided on the output end of the electric push rod. The protective mechanism includes a multi-stage telescopic tube disposed between the multi-stage telescopic tube and the connecting plate. The multi-stage telescopic tube is composed of several hollow round tubes that are sealed and slidably connected, and the several round tubes of the multi-stage telescopic tube are connected to each other through holes. An air inlet pipe with a one-way valve and connected to the interior is fixedly installed on one side of the multi-stage telescopic tube, and an air outlet pipe with a one-way valve and connected to the interior is fixedly installed on the other side of the multi-stage telescopic tube. Air outlet holes connected to the air outlet pipe are opened on both sides of the support block.

[0015] The advantages of this invention are: 1. This invention synchronously activates the first and second servo motors, which in turn move the second movable block and electric push rod via a second lead screw. This designed moving structure moves the electric push rod and the infusion tube to a suitable position and then stops. The electric push rod, via a connecting plate, moves the infusion tube into the oil passage orifice. Simultaneously, a micro-pump inside the storage box is activated, allowing the micro-pump to spray cleaning fluid through the infusion tube into the oil passage orifice of the engine block for flushing. This designed structure enables rapid flushing of the oil passage orifice of the engine block, and the flexible material of the infusion tube, while matching the curved path of the oil passage orifice, effectively prevents scratches on the inner wall of the oil passage orifice.

[0016] 2. This invention, by installing an arc-shaped guide plate and several rolling balls at the bottom of the outermost sleeve, assists the infusion tube in entering the oil passage pores, preventing blockage by impurities and oil stains, thus ensuring the unobstructed flow of the infusion tube. The movable ball head can bend the sleeve and infusion tube, adapting to the winding path within the oil passage pores, ensuring the infusion tube can fully enter for efficient cleaning. The designed structure achieves comprehensive cleaning of the oil passage pores while effectively protecting the infusion tube. Installing a filter screen at the end of the connecting pipe reduces the entry of external impurities. After prolonged use, when the first and second electromagnets are de-energized, the rotating plate, carrying the unblocking rod and impact balls, strikes the filter screen, causing vibration on its surface. The impact balls, when entering the mesh of the filter screen, act as a buffer and protect the unblocking rod.

[0017] 3. This invention connects a support block to the connecting frame, with the support block sliding within a groove. This provides effective support for the moving connecting frame and other components, effectively preventing localized loads and bending deformation in the components after prolonged operation. Furthermore, the auxiliary ball reduces friction as the support block slides within the groove, facilitating its movement. The arc-shaped cleaning plate pushes and collects impurities at the end of the groove, simplifying subsequent cleaning and reducing manual cleaning of the groove, thus improving efficiency and overall integrity during use.

[0018] 4. The present invention uses a multi-stage telescopic tube between the connecting plate and the multi-stage telescopic tube to protect the output rod of the electric push rod, preventing it from being directly exposed and thus affecting its service life. During stretching, the multi-stage telescopic tube draws in gas through the air inlet pipe. When the electric push rod returns to its original position with the multi-stage telescopic tube, the gas inside enters the air outlet through the air outlet pipe and is blown towards the impurities on the cleaning plate, thereby blowing all the impurities out of the slide groove. This achieves rapid and autonomous cleaning, reducing the impact of impurities on the sliding of the slider within the slide groove. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a structural schematic diagram of the storage box in this invention; Figure 3 In this invention Figure 2 Schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the structure of the electric push rod in this invention; Figure 5 This is a schematic diagram of the sleeve structure in this invention; Figure 6 This is a partial cross-sectional view of the connecting pipe in this invention; Figure 7 This is a schematic diagram of the structure at the rotating plate in this invention; Figure 8 This is a partial structural diagram of the support block in this invention.

[0021] In the diagram: 1. Workbench; 2. Engine block; 3. Oil passage orifice; 10. Cleaning mechanism; 11. First servo motor; 12. First lead screw; 13. First movable block; 14. Connecting frame; 15. Second servo motor; 16. Second lead screw; 17. Second movable block; 18. Electric push rod; 19. Infusion tube; 20. Flexible mechanism; 21. Sleeve; 22. Ball head; 23. Connecting pipe; 24. Filter screen; 25. Baffle plate; 26. Guide plate; 27. Rolling ball; 28. Unblocking component; 281. Rotating plate; 282. First electromagnet; 283. Second electromagnet; 284. Unblocking rod; 285. Impact ball; 30. Support mechanism; 31. Support block; 32. Slide groove; 33. Cleaning plate; 34. Auxiliary ball; 40. Protective mechanism; 41. Multi-stage telescopic tube; 42. Air inlet pipe; 43. Air outlet pipe; 44. Air vent; 50. Storage box. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-8 As shown, a flexible cleaning device for engine cylinder block oil passages includes a workbench 1 and an engine cylinder block component 2 placed on the workbench 1, with a plurality of oil passage openings 3 on the engine cylinder block component 2; it also includes: a cleaning mechanism 10, including a first servo motor 11 fixedly installed on the side of the workbench 1 and equipped with a first lead screw 12, with a first movable block 13 movably connected to the first lead screw 12; a connecting frame 14 fixedly connected to the first movable block 13, with a second servo motor 15 equipped with a second lead screw 16 fixedly installed inside the connecting frame 14, with a second movable block 17 movably connected to the second lead screw 16; an electric push rod 18 fixedly installed at the bottom of the second movable block 17, with the output end of the electric push rod 18 connected to an infusion tube 19 via a connecting plate; a storage box 50 containing cleaning fluid fixedly installed on the connecting frame 14, with a micro pump built into the storage box 50, and one end of the infusion tube 19 connected to the micro pump; During operation, when cleaning the oil passage pores 3 of the engine block component 2 is required, the engine block component 2 is first placed on the workbench 1, and then the first servo motor 11 and the second servo motor 15 are started simultaneously. The first servo motor 11 moves the second servo motor 15 and other components in the connecting frame 14 through the first lead screw 12 and the first movable block 13, while the second servo motor 15 moves the second movable block 17 and the electric push rod 18 and other components through the second lead screw 16. The above-designed moving structure enables the electric push rod 18 and the infusion tube 19 to be moved to a suitable position and then stopped (the position is monitored by a sensor, and the signal is sent to the controller to control the start and stop of the first servo motor 11 and the second servo motor 15). The electric push rod 18 moves the infusion tube 19 into the oil passage pores 3 through the connecting plate, and the micro pump in the storage box 50 is started, so that the micro pump sprays the internal cleaning fluid into the oil passage pores 3 of the engine block component 2 through the infusion tube 19 for rinsing.

[0024] The structure designed above enables rapid flushing of the oil passage 3 of the engine cylinder block 2. The flexible material of the infusion tube 19 not only matches the bending path of the oil passage 3, but also effectively prevents scratches on the inner wall of the oil passage 3.

[0025] A flexible mechanism 20 is provided on the output end of the electric actuator 18. The flexible mechanism 20 includes a sleeve 21, one end of which is movably connected to a hollow ball head 22. The sleeve 21 and the ball head 22 form a group, and several groups are provided below the connecting plate. The infusion tube 19 passes through several sleeves 21 and ball heads 22. Several staggered connecting pipes 23 are provided on the surface of the sleeve 21 and are connected to the inside of the infusion tube 19. A filter screen 24 is fixedly installed inside the connecting pipe 23. Several arc-shaped guide plates 25 are fixedly installed inside the infusion tube 19, near the connecting pipes 23. Two symmetrically arranged arc-shaped guide plates 26 are fixedly installed on one end of the sleeve 21, and several rolling balls 27 are wedged on the surface of the guide plates 26.

[0026] Specifically, a clearing assembly 28 is provided inside the connecting pipe 23. The clearing assembly 28 includes a rotating plate 281 rotatably connected inside the connecting pipe 23 via a torsion spring. A first electromagnet 282 is fixedly installed on one side of the rotating plate 281, and a second electromagnet 283 is fixedly installed inside the connecting pipe 23. A conical clearing rod 284 is fixedly installed on the rotating plate 281, and a rubber impact ball 285 is fixedly installed on the surface of the clearing rod 284.

[0027] During operation, as the connecting plate moves along with the infusion tube 19, it carries several sleeves 21 and ball heads 22 into the oil passage orifice 3. By installing an arc-shaped guide plate 26 and several rolling balls 27 at the bottom of the last sleeve 21, the infusion tube 19 is prevented from being blocked by impurities and oil within the oil passage orifice 3, ensuring its unobstructed flow. The movable ball head 22 can bend the sleeves 21 and infusion tube 19, adapting to the winding path within the oil passage orifice 3, ensuring the infusion tube 19 can fully enter the orifice 3 for efficient cleaning. Several staggered connecting pipes 23 can spray the liquid ejected from the infusion tube 19 into the oil passage orifice 3 from all directions, while the guide plate 25 guides some of the liquid, preventing most of the liquid from simply spraying out from one end of the infusion tube 19. The structure designed above can achieve all-round spraying and cleaning of the oil passage pores 3, while also effectively protecting the infusion tube 19 from blockage.

[0028] By installing a filter screen 24 at the end of the connecting pipe 23, external impurities are reduced from entering the connecting pipe 23. After prolonged use, when the first electromagnet 282 and the second electromagnet 283 are de-energized, the rotating plate 281, carrying the unblocking rod 284 and the impact ball 285, strikes the filter screen 24, causing vibration on its surface. Furthermore, when the impact ball 285 enters the mesh of the filter screen 24, it acts as a buffer and protects the unblocking rod 284.

[0029] A support mechanism 30 is provided on the connecting frame 14. The support mechanism 30 includes a support block 31 fixed to the bottom of the connecting frame 14 and sliding within the slide groove 32 of the workbench 1. Arc-shaped cleaning plates 33 are fixedly installed on both sides of the support block 31, and auxiliary balls 34 are wedged on both sides of the support block 31.

[0030] Specifically, a protective mechanism 40 is provided on the output end of the electric push rod 18. The protective mechanism 40 includes a multi-stage telescopic tube 41 disposed between the multi-stage telescopic tube 41 and the connecting plate. The multi-stage telescopic tube 41 is composed of several hollow round tubes that are sealed and slidably connected, and the several round tubes of the multi-stage telescopic tube 41 are connected to each other through holes. An air inlet pipe 42 with a one-way valve and connected to the interior is fixedly installed on one side of the multi-stage telescopic tube 41, and an air outlet pipe 43 with a one-way valve and connected to the interior is fixedly installed on one side of the multi-stage telescopic tube 41. Air outlet holes 44 connected to the air outlet pipe 43 are opened on both sides of the support block 31. During operation, the support block 31 is connected to the connecting frame 14, and slides within the slide groove 32. This provides effective support for the moving connecting frame 14 and other components, effectively preventing localized loads and bending deformation in the components within the connecting frame 14 after prolonged operation. The auxiliary ball 34 reduces friction as the support block 31 slides within the slide groove 32, facilitating its movement. The arc-shaped cleaning plate 33 pushes and collects impurities within the slide groove 32 at its end, facilitating subsequent cleaning and reducing the need for manual cleaning of the slide groove 32, thus improving efficiency and overall integrity during use.

[0031] The multi-stage telescopic tube 41 is installed between the connecting plate and the multi-stage telescopic tube 41 to protect the output rod of the electric push rod 18 from direct exposure, thus affecting its service life. During the stretching process, the multi-stage telescopic tube 41 draws in air through the air inlet pipe 42. When the electric push rod 18 returns to its original position with the multi-stage telescopic tube 41 in place, the air inside it enters the air outlet 44 through the air outlet pipe 43 and is blown towards the impurities on the cleaning plate 33, thereby blowing all the impurities out of the slide groove 32. This achieves rapid and autonomous cleaning and reduces the impact of impurities on the sliding of the slider within the slide groove 32.

[0032] The working principle is as follows: When it is necessary to clean the oil passage orifice 3 of the engine cylinder block component 2, the engine cylinder block component 2 is first placed on the workbench 1, and then the first servo motor 11 and the second servo motor 15 are started simultaneously. The first servo motor 11 moves the second servo motor 15 and other components in the connecting frame 14 through the first lead screw 12 and the first movable block 13. The second servo motor 15 moves the second movable block 17 and the electric push rod 18 and other components through the second lead screw 16. Through the above-designed moving structure, the electric push rod 18 and the infusion tube 19 are moved to a suitable position and then stopped. The electric push rod 18 moves the infusion tube 19 into the oil passage orifice 3 through the connecting plate. By activating the micro pump in the storage box 50, the micro pump sprays the internal cleaning fluid into the oil passage orifice 3 of the engine cylinder block component 2 through the infusion tube 19 for flushing.

[0033] When the connecting plate moves with the infusion tube 19, it carries several sleeves 21 and ball heads 22 into the oil passage orifice 3. By installing an arc-shaped guide plate 26 and several rolling balls 27 at the bottom of the last sleeve 21, the infusion tube 19 is prevented from being blocked by impurities and oil within the oil passage orifice 3, ensuring its unobstructed flow. The movable ball head 22 can bend the sleeves 21 and infusion tube 19 to adapt to the winding path within the oil passage orifice 3, ensuring the infusion tube 19 can fully enter the oil passage orifice 3 for efficient cleaning. Several staggered connecting pipes 23 can spray the liquid ejected from the infusion tube 19 into the oil passage orifice 3 from all directions, while the guide plate 25 guides some of the liquid, preventing most of the liquid from being sprayed directly from one end of the infusion tube 19. The structure described above not only achieves all-around spraying and cleaning of the oil passage pores 3, but also effectively protects the infusion pipe 19 from obstruction. Installing a filter screen 24 at the end of the connecting pipe 23 reduces the entry of external impurities into the connecting pipe 23. After prolonged use, when the first electromagnet 282 and the second electromagnet 283 are de-energized, the rotating plate 281, carrying the unblocking rod 284 and the impact ball 285, strikes the filter screen 24, causing vibration on its surface. Furthermore, when the impact ball 285 enters the pores of the filter screen 24, it acts as a buffer and protects the unblocking rod 284.

[0034] By connecting the support block 31 to the connecting frame 14 and allowing the support block 31 to slide within the slide groove 32, the support block 31 provides effective support for the moving connecting frame 14 and other components. This effectively prevents localized loads and bending deformation in the components within the connecting frame 14 after prolonged operation. The auxiliary ball 34 reduces friction as the support block 31 slides within the slide groove 32, facilitating its movement. The arc-shaped cleaning plate 33 pushes and collects impurities within the slide groove 32 at its end, facilitating subsequent cleaning and reducing manual cleaning of the slide groove 32, thus improving efficiency and overall integrity. The multi-stage telescopic tube 41 is placed between the connecting plate and the multi-stage telescopic tube 41 to protect the output rod of the electric push rod 18 from direct exposure, which could affect its service life. During the stretching process, the multi-stage telescopic tube 41 draws in gas through the air inlet pipe 42. When the electric push rod 18 returns to its original position with the multi-stage telescopic tube 41, the gas inside it enters the air outlet 44 through the air outlet pipe 43 and blows it toward the impurities on the cleaning plate 33, thereby blowing all the impurities out of the slide groove 32, thus achieving rapid and autonomous cleaning and reducing the impact of impurities on the sliding of the slider in the slide groove 32.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A flexible cleaning device for oil passage holes in an engine cylinder block, comprising a workbench (1) and an engine cylinder block component (2) placed on the workbench (1), wherein the engine cylinder block component (2) is provided with a plurality of oil passage holes (3); characterized in that: Also includes: The cleaning mechanism (10) includes a first servo motor (11) fixedly installed on the side of the workbench (1) and having a first lead screw (12), and a first movable block (13) is movably connected to the first lead screw (12). The connecting frame (14) is fixedly connected to the first movable block (13), and a second servo motor (15) with a second lead screw (16) is fixedly installed inside the connecting frame (14). A second movable block (17) is movably connected to the second lead screw (16). An electric push rod (18) is fixedly installed at the bottom of the second movable block (17), and the output end of the electric push rod (18) is connected to an infusion tube (19) through a connecting plate. A storage box (50) with cleaning fluid is fixedly installed on the connecting frame (14). The storage box (50) has a built-in micro pump, and one end of the infusion tube (19) is connected to the micro pump.

2. The flexible cleaning device for engine cylinder block oil passage holes according to claim 1, characterized in that: The output end of the electric push rod (18) is provided with a flexible mechanism (20), the flexible mechanism (20) includes a sleeve (21), one end of the sleeve (21) is movably connected to a hollow ball head (22), the sleeve (21) and the ball head (22) are a group, and several groups are provided below the connecting plate, the infusion tube (19) passes through several sleeves (21) and ball heads (22).

3. The flexible cleaning device for engine cylinder block oil passage holes according to claim 2, characterized in that: The surface of the sleeve (21) is provided with several staggered connecting tubes (23) that are connected to the inside of the infusion tube (19), and a filter screen (24) is fixedly installed inside the connecting tube (23).

4. The flexible cleaning device for engine cylinder block oil passage holes according to claim 3, characterized in that: The infusion tube (19) has several arc-shaped guide plates (25) fixedly installed inside, and the guide plates (25) are close to the connecting tube (23).

5. The flexible cleaning device for engine cylinder block oil passage holes according to claim 2, characterized in that: Two symmetrically arranged arc-shaped guide plates (26) are fixedly installed at one end of the sleeve (21), and several rolling balls (27) are wedged on the surface of the guide plates (26).

6. The flexible cleaning device for engine cylinder block oil passage holes according to claim 3, characterized in that: The connecting pipe (23) is provided with a dredging component (28), which includes a rotating plate (281) rotatably connected to the connecting pipe (23) by a torsion spring. A first electromagnet (282) is fixedly installed on one side of the rotating plate (281), and a second electromagnet (283) is fixedly installed inside the connecting pipe (23).

7. The flexible cleaning device for engine cylinder block oil passage holes according to claim 6, characterized in that: A conical unblocking rod (284) is fixedly installed on the rotating plate (281), and a rubber impact ball (285) is fixedly installed on the surface of the unblocking rod (284).

8. The flexible cleaning device for engine cylinder block oil passage holes according to claim 1, characterized in that: The connecting frame (14) is provided with a support mechanism (30), which includes a support block (31) fixed to the bottom of the connecting frame (14) and sliding in the groove (32) of the workbench (1).

9. The flexible cleaning device for engine cylinder block oil passage holes according to claim 8, characterized in that: Arc-shaped cleaning plates (33) are fixedly installed on both sides of the support block (31), and auxiliary balls (34) are wedged on both sides of the support block (31).

10. A flexible cleaning device for engine cylinder block oil passage holes according to claim 9, characterized in that: The output end of the electric push rod (18) is provided with a protective mechanism (40). The protective mechanism (40) includes a multi-stage telescopic tube (41) disposed between the multi-stage telescopic tube (41) and the connecting plate. The multi-stage telescopic tube (41) is composed of several hollow round tubes that are sealed and slidably connected, and the several round tubes of the multi-stage telescopic tube (41) are connected to each other through through holes. One side of the multi-stage telescopic tube (41) is fixedly installed with an air inlet pipe (42) that is connected to the interior and has a one-way valve. The other side of the multi-stage telescopic tube (41) is fixedly installed with an air outlet pipe (43) that is connected to the interior and has a one-way valve. The two sides of the support block (31) are provided with air outlet holes (44) that are connected to the air outlet pipe (43).

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