CN118649936A - Automatic crankshaft cleaning system - Google Patents

Abstract

The invention belongs to the technical field of crankshaft cleaning, in particular to an automatic crankshaft cleaning system which comprises a base, a driving assembly, an oil hole cleaning assembly and a spraying assembly, wherein the base is provided with a plurality of oil holes; the driving assembly comprises a pair of driving rollers rotatably connected to the upper side of the base; the oil hole cleaning assembly comprises a group of supporting seats fixedly connected to the upper side of the base; the top of the supporting seat is provided with a concave part; a pair of rollers are rotatably connected inside the concave part; the water spraying port is arranged at the position between the pair of rollers in the concave part; the bottom of the water jet is communicated with a first water inlet pipe through a runner; the spraying assembly and the oil hole cleaning assembly are matched to work, so that the surface of the crankshaft and the oil passage holes are cleaned respectively, the comprehensive automatic cleaning function of all parts of the crankshaft is realized, the delivery quality of the crankshaft is ensured, the cleaning efficiency of the oil passage holes is higher, the oil passage holes are not required to be cleaned manually, the labor intensity is reduced, and the problem of uneven quality level of manual cleaning is avoided.

Description

Automatic crankshaft cleaning system

Technical Field

The invention belongs to the technical field of crankshaft cleaning, in particular to an automatic crankshaft cleaning system.

Background Art

The crankshaft is one of the important parts in the internal combustion engine. It is used to convert the up and down reciprocating motion of the piston into rotational motion. Its structure usually includes the main shaft, connecting rod shaft, crankshaft swing arm and oil channel hole, etc. The production quality of the crankshaft will directly affect the performance, smoothness and fuel efficiency of the engine. During the crankshaft production and processing, it is inevitable that oil, dust, metal chips, burrs and other debris will remain on its surface and inside the oil channel hole. Therefore, the crankshaft needs to be cleaned after processing to improve its factory quality.

A Chinese patent application CN106000976B discloses an engine crankshaft cleaning machine, the main points of its technical solution are: including a base, a slide bar, a hydraulic device, a small support roller fixing block, a first transmission shaft, a large support roller fixing block, a second transmission shaft, a third transmission shaft, a water pump, a circulating water pipeline, a circulating water switch and a main control cabinet. When working, the crankshaft is placed between the large roller and the small roller, and the water flow acts on the hydraulic device through the nozzle on the circulating water pipeline, so that the hydraulic device drives the engine crankshaft to rotate. While the crankshaft rotates, the circulating water pipeline sprays water to the rotating crankshaft surface to achieve crankshaft cleaning. This technology is easy to operate, greatly improves work efficiency, can effectively ensure the crankshaft cleaning quality, and can also reduce the crankshaft cleaning cost.

However, the above technologies often have the following defects: the existing crankshaft cleaning device can usually only automatically clean the crankshaft surface, and its function is relatively simple. As for the oil channel holes of the crankshaft, it is still necessary to manually poke and clean the oil channel holes with an oil hole brush, or manually flush them with high-pressure water flow. The process is usually time-consuming and labor-intensive, and since the inside of the oil channel holes is narrow and dim, there is a problem that the cleaning quality is difficult to guarantee.

To this end, the present invention provides an automatic crankshaft cleaning system.

Summary of the invention

In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

The technical solution adopted by the present invention to solve the technical problem is: the crankshaft automatic cleaning system described in the present invention comprises a base, a driving assembly, an oil hole cleaning assembly and a spray assembly;

The driving assembly is used to drive the crankshaft to rotate; the driving assembly includes a pair of driving rollers rotatably connected to the upper side of the base; the rotating shaft of one of the driving rollers is controlled to rotate by a motor;

The oil hole cleaning assembly is used to clean the oil channel hole of the crankshaft; the oil hole cleaning assembly includes a group of support seats fixedly connected to the upper side of the base; a recessed portion is provided on the top of the support seat; a pair of rollers are rotatably connected inside the recessed portion; a water spray port is provided at the position between the pair of rollers; the bottom of the water spray port is connected to a water inlet pipe 1 through a flow channel;

The spray assembly is used to clean the surface of the crankshaft; the spray assembly is arranged above the support seat.

Preferably, the spray assembly includes a pair of brackets fixedly connected to the upper side of the base; a rotating rod is rotatably connected between the brackets; a roller is fixedly connected to the surface of the rotating rod; a group of external holes and elastic brush strips are evenly distributed on the surface of the roller; the roller is connected to a water inlet pipe 2; a pulley 1 is fixedly connected to the end of the rotating shaft; a pulley 2 is fixedly connected to the end of the rotating rod; and pulley 1 and pulley 2 are connected by a transmission belt.

Preferably, the crankshaft and the drum rotate in opposite directions; the diameter of pulley one is greater than the diameter of pulley two.

Preferably, one end of the drum is designed to be open; a hollow adjusting part is provided inside the drum; the second water inlet pipe extends into the interior of the drum through the open end of the drum and is connected with the adjusting part; a group of inner holes are evenly distributed on the lower side of the adjusting part; a group of guide wheels are rotatably connected to both ends of the adjusting part, and the guide wheels are in contact with the inner wall of the drum.

Preferably, a counterweight bar is fixedly connected to the middle portion of the adjusting member.

Preferably, a movable ring is slidably connected inside the water spout; a telescopic spring is fixedly connected between the movable ring and the bottom of the water spout; and a pressure relief structure is arranged inside the movable ring.

Preferably, an elastic pad is fixedly connected to the upper side of the movable ring.

Preferably, the pressure relief structure includes a magnetic ring fixedly connected to the inside of the movable ring; a conical sealing block is arranged inside the magnetic ring, and the sealing block and the magnetic ring are magnetically attracted to each other; a reel is rotatably connected inside the support seat, and the rotation of the reel is controlled by a motor; a connecting rope is wound around the surface of the reel, and the other end of the connecting rope is connected to the tail end of the sealing block.

Preferably, an elastic water-containing ring is fixedly connected to the side of the blocking block; a water-containing space is formed between the water-containing ring and the blocking block; and a gap exists between the side of the water-containing ring close to the connecting rope and the blocking block.

Preferably, the end of the connecting rope is fixedly connected to a connecting block; a force unloading spring and a sealing film are fixedly connected between the connecting block and the blocking block, and the sealing film is coated on the outside of the force unloading spring.

The beneficial effects of the present invention are as follows:

1. The automatic crankshaft cleaning system described in the present invention cleans the surface and oil passage holes of the crankshaft respectively through the cooperation of a spray assembly and an oil hole cleaning assembly, thereby realizing a comprehensive automatic cleaning function for all parts of the crankshaft and ensuring the factory quality of the crankshaft. In addition, the cleaning efficiency of the oil passage holes of the present invention is high, and there is no need to manually clean the oil passage holes, thereby reducing labor intensity and avoiding the problem of uneven quality of manual cleaning. When cleaning the oil passage holes, the main journal oil passage holes of the crankshaft are controlled by a motor to rotate downward and align with the water spray port, and then the motor is controlled to stop running, and water is supplied to the inside of a water inlet pipe. The water flows along the water inlet pipe into the flow passages of multiple support seats and is sprayed into the inside of the oil passage holes through the water spray ports, thereby flushing the inside of the oil passage holes to remove debris, dust, oil stains and other debris inside the oil passage holes.

2. The present invention describes an automatic crankshaft cleaning system, in which water flows into the interior of the drum through a second water inlet pipe during cleaning, flows out along the outer holes on the drum surface and showers onto the crankshaft surface, thereby flushing the crankshaft, and when the motor drives the shaft to rotate, the drum is driven to rotate synchronously through the first pulley, the transmission belt, the second pulley and the rotating rod, and the brush strips on the drum surface are used to rub and scrape the crankshaft surface, cooperating with the water flow to improve the separation efficiency between dirt and the crankshaft, and the brush strips are conducive to extending into the irregular shape of the crankshaft to scrub the complex surface of the crankshaft, further improving the cleaning effect of the crankshaft.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a perspective view of the present invention;

FIG2 is a partial enlarged view of point A in FIG1;

Fig. 3 is a side view of the present invention;

FIG4 is a schematic diagram of the structure of the support seat and the adjusting member in the present invention;

FIG5 is a partial enlarged view of point B in FIG4;

FIG6 is a cross-sectional view of the support seat of the present invention;

FIG7 is a partial enlarged view of point C in FIG6;

FIG8 is a partial enlarged view of point D in FIG7 .

In the figure: 1. base; 2. crankshaft; 3. driving roller; 4. rotating shaft; 5. motor; 6. oil channel hole; 7. supporting seat; 8. roller; 9. water nozzle; 10. flow channel; 11. water inlet pipe 1; 12. bracket; 13. rotating rod; 14. roller; 15. outer hole; 16. brush strip; 17. water inlet pipe 2; 18. pulley 1; 19. pulley 2; 20. transmission belt; 21. adjusting part; 22. inner hole; 23. guide wheel; 24. counterweight strip; 25. movable ring; 26. telescopic spring; 27. elastic pad; 28. magnetic ring; 29. blocking block; 30. reel; 31. connecting rope; 32. water containing ring; 33. connecting block; 34. unloading spring; 35. sealing membrane.

DETAILED DESCRIPTION

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

As shown in FIGS. 1 to 8 , an automatic crankshaft cleaning system according to the present invention comprises a base 1, a drive assembly, an oil hole cleaning assembly and a spray assembly;

The driving assembly is used to drive the crankshaft 2 to rotate; the driving assembly includes a pair of driving rollers 3 rotatably connected to the upper side of the base 1; the rotation shaft 4 of one of the driving rollers 3 is controlled to rotate by a motor 5;

The oil hole cleaning assembly is used to clean the oil passage hole 6 of the crankshaft 2; the oil hole cleaning assembly includes a set of support seats 7 fixedly connected to the upper side of the base 1; a recessed portion is provided on the top of the support seat 7; a pair of rollers 8 are rotatably connected inside the recessed portion; a water spray port 9 is provided at a position between the pair of rollers 8 in the recessed portion; the bottom of the water spray port 9 is connected to a water inlet pipe 11 through a flow channel 10;

The spray assembly is used to clean the surface of the crankshaft 2 ; the spray assembly is arranged above the support seat 7 .

The crankshaft 2 cleaning device in the prior art can usually only automatically clean the surface of the crankshaft 2, and its function is relatively simple. As for the oil channel hole 6 of the crankshaft 2, it is still necessary to manually poke and clean the oil channel hole 6 with an oil hole brush, or manually flush it with high-pressure water. The process is usually time-consuming and labor-intensive, and since the inside of the oil channel hole 6 is narrow and dark, there is a problem that the cleaning quality is difficult to guarantee.

When the present invention is used, the crankshaft 2 is placed on the surface of multiple support seats 7 and a pair of driving rollers 3, and the support seats 7 correspond to the main journal oil passage holes 6 of the crankshaft 2 respectively. The motor 5 drives the rotating shaft 4 and the driving roller 3 to rotate, and the driving roller 3 drives the crankshaft 2 to rotate, and then the surface of the crankshaft 2 is cleaned by the spray assembly, and the multiple oil passage holes 6 of the crankshaft 2 are cleaned by the oil hole cleaning assembly. There is no fixed form for which one comes first. The surface of the crankshaft 2 can be cleaned first, or the oil passage holes 6 of the crankshaft 2 can be cleaned first. When cleaning the oil passage holes 6, the main journal oil passage holes 6 of the crankshaft 2 are controlled by the motor 5 to rotate downward and align with the water spray port 9, and then the motor 5 is controlled to stop running, and water is supplied to the inside of the water inlet pipe 11. The water flows along the water inlet pipe 11 into the flow channel 10 of the multiple support seats 7, and is sprayed into the inside of the oil passage hole 6 through the water spray port 9, thereby flushing the inside of the oil passage hole 6 to remove the cutting chips, dust, oil stains and other debris inside the oil passage hole 6.

The present invention cleans the surface of the crankshaft 2 and the oil channel hole 6 respectively by the cooperation of the spray component and the oil hole cleaning component, thereby realizing the comprehensive automatic cleaning function of all parts of the crankshaft 2 and ensuring the factory quality of the crankshaft 2. In addition, the present invention has a high cleaning efficiency for the oil channel hole 6, and there is no need for manual cleaning of the oil channel hole 6, which reduces labor intensity and avoids the problem of uneven quality of manual cleaning.

In addition, in actual cleaning work, in order to improve the operating efficiency of the device, the surface roughness of the driving roller 3 can be appropriately increased to prevent water and oil from causing slippage between the driving roller 3 and the crankshaft 2. The motor 5 should preferably use a servo motor 5 with a waterproof function.

As a preferred embodiment of the present invention, the spray assembly includes a pair of brackets 12 fixedly connected to the upper side of the base 1; a rotating rod 13 is rotatably connected between the brackets 12; a roller 14 is fixedly connected to the surface of the rotating rod 13; a group of external holes 15 and elastic brush strips 16 are evenly distributed on the surface of the roller 14; the roller 14 is connected to a water inlet pipe 2 17; a pulley 18 is fixedly connected to the end of the rotating shaft 4; a pulley 2 19 is fixedly connected to the end of the rotating rod 13; the pulley 18 and the pulley 2 19 are connected by a transmission belt 20. During cleaning, water flows into the drum 14 through the second water inlet pipe 17, flows out along the outer hole 15 on the surface of the drum 14 and splashes onto the surface of the crankshaft 2, thereby flushing the crankshaft 2. When the motor 5 drives the rotating shaft 4 to rotate, it drives the drum 14 to rotate synchronously through the pulley 18, the transmission belt 20, the pulley 2 19 and the rotating rod 13, and the brush strip 16 on the surface of the drum 14 is used to rub and scrape the surface of the crankshaft 2, cooperating with the water flow to improve the separation efficiency between the dirt and the crankshaft 2. In addition, the brush strip 16 is conducive to extending into the irregular shape of the crankshaft 2, brushing the complex surface of the crankshaft 2, and further improving the cleaning effect of the crankshaft 2.

The crankshaft 2 and the roller 14 rotate in opposite directions, and the linear speeds of the bottom of the roller 14 and the top of the crankshaft 2 are just opposite, so that a good friction effect is maintained between the brush bar 16 and the crankshaft 2; the diameter of the pulley 18 is larger than the diameter of the pulley 2 19, and thus the rotation speed of the rotating rod 13 is larger than the rotation speed of the rotating shaft 4, that is, the rotation speed of the roller 14 is larger than the rotation speed of the crankshaft 2, so that a differential effect is formed between the roller 14 and the crankshaft 2, thereby increasing the friction frequency between the brush bar 16 and the crankshaft 2, and further improving the efficiency of removing dirt from the surface of the crankshaft 2.

As a preferred embodiment of the present invention, one end of the drum 14 is designed to be open; a hollow adjusting member 21 is provided inside the drum 14; the water inlet pipe 17 extends into the interior of the drum 14 through the open end of the drum 14 and is connected to the adjusting member 21; a group of inner holes 22 are evenly distributed on the lower side of the adjusting member 21; a group of guide wheels 23 are rotatably connected to both ends of the adjusting member 21, and the guide wheels 23 are in contact with the inner wall of the drum 14; a counterweight bar 24 is fixedly connected to the middle of the adjusting member 21. When water is supplied through the water inlet pipe 17, the water first enters the inside of the adjusting member 21, and then is discharged outward through the inner hole 22 and the outer hole 15. During the rotation of the drum 14, the guide wheel 23 rolls on the inner wall surface of the drum 14, and the adjusting member 21 is always located at the bottom of the drum 14 under the action of gravity, and then the water is always discharged through the outer hole 15 at the bottom of the drum 14, ensuring that the spraying direction of the water is always downward, avoiding the problem that the water flows out through other outer holes 15 and cannot wash the crankshaft 2, thereby improving the utilization of water resources and ensuring that the crankshaft 2 has sufficient water spraying pressure.

As a preferred embodiment of the present invention, a movable ring 25 is slidably connected inside the water outlet 9; a telescopic spring 26 is fixedly connected between the movable ring 25 and the bottom of the water outlet 9; a pressure relief structure is arranged inside the movable ring 25, and the pressure relief structure has a certain threshold value, and the pressure relief structure is opened when the pressure is greater than the threshold value; an elastic pad 27 is fixedly connected to the upper side of the movable ring 25. By providing the movable ring 25 and the pressure relief structure, the pressure relief structure remains in a closed state when the device is not in use, thereby preventing external dust and other debris from entering the water spray port 9 and causing blockage. During cleaning, water flows upward through the flow channel 10 into the water spray port 9, and pushes the movable ring 25 to move upward, so that the elastic pad 27 fits the surface of the crankshaft 2. At this time, the movable ring 25 stops moving. When the water pressure inside the water spray port 9 reaches the threshold of the pressure relief structure, the pressure relief structure is in a conducting state, and water can smoothly enter the oil channel hole 6 and flush it. The gap between the movable ring 25 and the crankshaft 2 is blocked by the elastic pad 27, which can prevent water from overflowing to the surroundings during cleaning, thereby increasing the flushing force on the oil channel hole 6.

As a preferred embodiment of the present invention, the pressure relief structure includes a magnetic ring 28 fixedly connected to the inside of the movable ring 25; a conical sealing block 29 is arranged inside the magnetic ring 28, and the sealing block 29 and the magnetic ring 28 are magnetically attracted to each other; a reel 30 is rotatably connected inside the support seat 7, and the reel 30 is controlled to rotate by a motor; a connecting rope 31 is wound on the surface of the reel 30, and the other end of the connecting rope 31 is connected to the tail end of the sealing block 29.

When the water pressure inside the water spout 9 reaches a certain threshold, the thrust of the water flow on the blocking block 29 is greater than the magnetic attraction between the blocking block 29 and the magnetic ring 28. At this time, the blocking block 29 is separated from the magnetic ring 28, and the water flow can smoothly clean the oil passage hole 6. The water flow can drive the blocking block 29 to enter the oil passage hole 6, so that the blocking block 29 moves upward along the oil passage hole 6. At this time, the connecting rope 31 pulls the reel 30 to rotate and is released from the surface of the reel 30. Then, the motor is used to drive the reel 30 to reverse and reel the connecting rope 31, so that the blocking block 29 moves downward along the oil passage hole 6. Movement, by intermittently starting the motor, the blocking block 29 can be made to reciprocate inside the oil channel hole 6. With the flushing of water flow, the blocking block 29 can scrape and impact the stubborn dirt inside the oil channel hole 6, especially for the cutting chips, burrs, etc. that are partially stuck inside the oil channel hole 6. The cleaning effect is very good when the blocking block 29 is used; in addition, when the blocking block 29 is inside the oil channel hole 6, it can use its conical surface to guide the water, so that the water flow is dispersed to the side and the inner wall surface of the oil channel hole 6 is concentratedly flushed, further promoting the removal of dirt adhering to the inner wall surface.

As a preferred embodiment of the present invention, an elastic water-containing ring 32 is fixedly connected to the side of the sealing block 29; a water-containing space is formed between the water-containing ring 32 and the sealing block 29; and a gap exists between the side of the water-containing ring 32 close to the connecting rope 31 and the sealing block 29. By setting the water holding ring 32, water can flow into the water-containing space inside the water holding ring 32 through the gap between the water holding ring 32 and the sealing block 29 (the hollow arrow in FIG8 is the direction in which the water flows into the water holding ring 32). On the one hand, the resistance to the water flow is increased, the efficiency of the water flow in driving the sealing block 29 to move is improved, and the dispersion effect of the water flow is improved. On the other hand, when the connecting rope 31 pulls the sealing block 29 to move downward inside the oil channel hole 6, the force on the water holding ring 32 is increased and deformed and expanded outward because it is opposite to the direction of the water flow, so that the edge of the water holding ring 32 can fit with the inner wall of the oil channel hole 6, and then the sealing block 29 can use the water holding ring 32 to scrape the inner wall of the oil channel hole 6 when moving, thereby further improving the cleaning efficiency of stubborn dirt.

The end of the connecting rope 31 is fixedly connected to a connecting block 33; a force unloading spring 34 and a sealing film 35 are fixedly connected between the connecting block 33 and the blocking block 29, and the sealing film 35 is covered on the outside of the force unloading spring 34. By providing the force unloading spring 34, when the connecting rope 31 pulls the blocking block 29 to move, if the blocking block 29 is hung on the upper end of the oil passage hole 6 or an obstacle inside thereof, and a setback occurs, the force unloading spring 34 can be used to offset and unload the setback force, thereby preventing the blocking block 29 from hanging somewhere and causing the connecting rope 31 or the blocking block 29 to break due to stress concentration, thereby extending its service life, and providing the sealing film 35 to protect the force unloading spring 34 from being corroded or stuck due to the entry of impurities.

The above-mentioned front, back, left, right, top and bottom are all based on Figure 1 of the accompanying drawings in the specification. According to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (10)

1. An automatic cleaning system for a crankshaft is characterized in that: comprises a base (1), a driving assembly, an oil hole cleaning assembly and a spraying assembly;

The driving assembly is used for driving the crankshaft (2) to rotate; the driving assembly comprises a pair of driving rollers (3) rotatably connected to the upper side of the base (1); the rotation of the rotating shaft (4) of one driving roller (3) is controlled by a motor (5);

The oil hole cleaning assembly is used for cleaning an oil passage hole (6) of the crankshaft (2); the oil hole cleaning assembly comprises a group of supporting seats (7) fixedly connected to the upper side of the base (1); the top of the supporting seat (7) is provided with a concave part; a pair of rollers (8) are rotatably connected inside the concave part; the water spraying port (9) is arranged at the position between the pair of rollers (8) in the concave part; the bottom of the water jet (9) is communicated with a first water inlet pipe (11) through a runner (10);

the spraying assembly is used for cleaning the surface of the crankshaft (2); the spraying assembly is arranged above the supporting seat (7).

2. A crankshaft automatic cleaning system according to claim 1, wherein: the spraying assembly comprises a pair of brackets (12) fixedly connected to the upper side of the base (1); a rotating rod (13) is rotatably connected between the brackets (12); the surface of the rotating rod (13) is fixedly connected with a roller (14); a group of outer holes (15) and elastic brush strips (16) are uniformly distributed on the surface of the roller (14); the roller (14) is communicated with a second water inlet pipe (17); the end part of the rotating shaft (4) is fixedly connected with a belt pulley I (18); the end part of the rotating rod (13) is fixedly connected with a belt pulley II (19); the belt wheel I (18) is connected with the belt wheel II (19) through a transmission belt (20).

3. A crankshaft automatic cleaning system according to claim 2, wherein: the rotation directions of the crankshaft (2) and the roller (14) are opposite; the diameter of the first belt wheel (18) is larger than that of the second belt wheel (19).

4. A crankshaft automatic cleaning system according to claim 2, wherein: one end of the roller (14) is designed to be open; a hollow adjusting piece (21) is arranged in the roller (14); the second water inlet pipe (17) extends to the inside of the roller (14) through the opening end of the roller (14) and is communicated with the adjusting piece (21); a group of inner holes (22) are uniformly distributed on the lower side of the adjusting piece (21); the two ends of the adjusting piece (21) are rotatably connected with a group of guide wheels (23), and the guide wheels (23) are attached to the inner wall of the roller (14).

5. The automatic crankshaft cleaning system according to claim 4, wherein: the middle part of the adjusting piece (21) is fixedly connected with a counterweight strip (24).

6. A crankshaft automatic cleaning system according to claim 1, wherein: a movable ring (25) is connected inside the water jet (9) in a sliding way; a telescopic spring (26) is fixedly connected between the movable ring (25) and the bottom of the water jet (9); the movable ring (25) is internally provided with a pressure relief structure.

7. The automatic crankshaft cleaning system according to claim 6, wherein: an elastic pad (27) is fixedly connected to the upper side of the movable ring (25).

8. The automatic crankshaft cleaning system according to claim 7, wherein: the pressure relief structure comprises a magnetic ring (28) fixedly connected to the inside of the movable ring (25); a conical blocking block (29) is arranged in the magnetic ring (28), and the blocking block (29) and the magnetic ring (28) are mutually magnetically attracted; the inside of the supporting seat (7) is rotationally connected with a rolling wheel (30), and the rolling wheel (30) is controlled to rotate by a motor; the surface of the winding wheel (30) is wound with a connecting rope (31), and the other end of the connecting rope (31) is connected with the tail end of the plugging block (29).

9. The automatic crankshaft cleaning system according to claim 8, wherein: an elastic Cheng Shuihuan (32) is fixedly connected to the side face of the blocking block (29); a water containing space is formed between the Cheng Shuihuan (32) and the plugging block (29); a gap exists between one side, close to the connecting rope (31), of the Cheng Shuihuan (32) and the plugging block (29).

10. A crankshaft automatic cleaning system according to claim 9, wherein: the end part of the connecting rope (31) is fixedly connected with a connecting block (33); a force unloading spring (34) and a sealing film (35) are fixedly connected between the connecting block (33) and the plugging block (29), and the sealing film (35) is coated outside the force unloading spring (34).