Crankshaft surface cleaning apparatus

Abstract

This utility model belongs to the field of automated workpiece surface cleaning technology, specifically relating to a crankshaft surface cleaning device. It includes a cleaning tank containing cleaning components, which include a large-diameter clamping component, a small-diameter clamping component, a rotation drive component, a main shaft diameter cleaning component, and a connecting rod diameter cleaning component. A crankshaft cleaning station is located between the large-diameter and small-diameter clamping components. The large-diameter and small-diameter clamping components are used to clamp the large-diameter and small-diameter ends of the crankshaft, respectively. The rotation drive component drives the crankshaft to rotate. The main shaft diameter cleaning component and the connecting rod diameter cleaning component are located on the front and rear sides of the crankshaft cleaning station, respectively, for cleaning the main shaft diameter and connecting rod diameter of the crankshaft. This utility model achieves precise cleaning of the crankshaft, with a high degree of automation in the cleaning process, and the cleaning medium is recycled, reducing energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of automated cleaning technology for workpiece surfaces, and specifically relates to a crankshaft surface cleaning device. Background Technology

[0002] In the field of crankshaft precision machining, the cleanliness of the workpiece surface directly affects the machining quality and production cost of key processes. In traditional machining processes, after the crankshaft goes through multiple processes, the surface is prone to residual contaminants such as cutting fluid and metal shavings. If these impurities are not effectively removed, two major problems will arise: First, contaminants will cause damage to the workpiece surface during machining, significantly increasing the risk of process scrap; second, hard particles will accelerate the abnormal wear of machining tools, greatly increasing equipment maintenance costs.

[0003] The general cleaning equipment currently used in the industry has obvious technical limitations: conventional spray systems are difficult to thoroughly clean complex structures such as crankshaft oil holes and grooves; there is a lack of automated connection between the cleaning station and the processing equipment, which requires manual transfer and leads to efficiency loss; although some high-pressure cleaning solutions improve the cleaning effect, they have the potential risks of excessive energy consumption and secondary contamination of workpieces. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a crankshaft surface cleaning device.

[0005] This invention is implemented as follows: a crankshaft surface cleaning device is provided, including a cleaning tank. A cleaning assembly is provided in the cleaning tank. The cleaning assembly includes a large-diameter clamping assembly, a small-diameter clamping assembly, a rotation drive assembly, a main shaft diameter cleaning assembly, and a connecting rod diameter cleaning assembly. The crankshaft cleaning station is located between the large-diameter clamping assembly and the small-diameter clamping assembly. The large-diameter clamping assembly and the small-diameter clamping assembly are used to clamp the large-diameter end and the small-diameter end of the crankshaft, respectively. The rotation drive assembly is used to drive the crankshaft to rotate. The main shaft diameter cleaning assembly and the connecting rod diameter cleaning assembly are respectively located on the front and rear sides of the crankshaft cleaning station and are used to clean the main shaft diameter and the connecting rod diameter of the crankshaft, respectively.

[0006] Preferably, the rotation drive assembly includes a drive motor, a reducer, a synchronous belt, a crankshaft rotation drive cylinder, and crankshaft chucks. The drive motor is connected to the reducer, and the output end of the reducer is provided with a synchronous belt drive pulley. A synchronous belt driven pulley is fixedly provided on the outer side of one end of the crankshaft rotation drive cylinder. A synchronous belt is sleeved between the synchronous belt drive pulley and the synchronous belt driven pulley. The crankshaft rotation drive cylinder passes through a first bearing, and at least two crankshaft chucks are connected to the other end of the crankshaft rotation drive cylinder. When the crankshaft rotates, the crankshaft chucks engage with both sides of the crankshaft balance block.

[0007] In a further preferred embodiment, a support connecting plate is provided in the cleaning tank, the reducer is connected to the upper end of one side of the support connecting plate, the output end of the reducer passes through the support connecting plate and is connected to the synchronous belt drive pulley, the end of the crankshaft rotation drive cylinder away from the crankshaft pawl passes through the support connecting plate and is connected to the synchronous belt driven pulley, and the support connecting plate is rotatably connected to the crankshaft rotation drive cylinder.

[0008] Further preferably, the large-diameter clamping assembly and the rotation drive assembly are disposed on the same side. The large-diameter clamping assembly includes a large-diameter clamping cylinder, a connecting plate, a guide rail, and a large-diameter center shaft. The output end of the large-diameter clamping cylinder is fixedly connected to the connecting plate. The lower side of the connecting plate is slidably connected to the guide rail. The guide rail is fixedly disposed in the cleaning tank. The connecting plate is engaged with the large-diameter center shaft. The crankshaft rotation drive cylinder is sleeved on the outside of the large-diameter center shaft. The large-diameter center shaft passes through the end of the crankshaft rotation drive cylinder to form a large-diameter center.

[0009] Further preferably, a slot with a diameter smaller than that of the large-diameter center shaft is provided at the position where the large-diameter center shaft connects to the connecting plate, and a connecting groove is provided at one end of the connecting plate to accommodate the slot section of the large-diameter center shaft. The slot section of the large-diameter center shaft is matched in the connecting groove of the connecting plate to form a snap-fit. A slider is provided on the guide rail, and the upper surface of the slider is fixedly connected to the lower surface of the connecting plate.

[0010] Preferably, the small-diameter clamping assembly includes a small-diameter clamping cylinder, a small-diameter tip shaft, and a second bearing. The output end of the small-diameter clamping cylinder is connected to the small-diameter tip shaft, and the small-diameter tip shaft passes through the second bearing to form a small-diameter tip at the end of the small-diameter tip shaft.

[0011] Preferably, the spindle diameter cleaning assembly includes several spindle cleaning nozzles, which are connected together to a spindle cleaning tube; the connecting rod diameter cleaning assembly includes several connecting rod diameter cleaning nozzles, which are connected together to a connecting rod diameter cleaning tube.

[0012] Further preferably, the crankshaft surface cleaning equipment also includes an oil return tank and a clean liquid tank. The oil inlet at the upper end of the oil return tank is connected to the oil outlet of the oil return filter. The oil inlet of the oil return filter is connected to the oil outlet of the return pipe. The oil inlet of the return pipe is connected to the cleaning tank. The entire length of the return pipe from the oil inlet to the oil outlet is inclined downwards. The oil outlet of the clean liquid tank is connected to the oil inlet of the oil pump. The oil outlet of the oil pump is connected to the oil inlet of the inlet filter. The oil outlet of the inlet filter is connected to the oil inlet of the inlet pipe. The oil outlet of the inlet pipe is connected to the main journal cleaning pipe and the connecting rod diameter cleaning pipe.

[0013] In a further preferred embodiment, a partition is provided between the oil return tank and the clean liquid tank, and the upper end of the partition does not contact the top wall of the oil return tank and the clean liquid tank.

[0014] Preferably, crankshaft support plates are provided on the left and right sides of the crankshaft cleaning station, and an air knife bracket is provided in the cleaning tank. An air knife is installed on the air knife bracket, the air inlet of the air knife is connected to the compressed air production device, and the air outlet of the air knife faces the crankshaft cleaning station.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] A crankshaft surface cleaning device is provided, which achieves precise cleaning of the crankshaft, and the cleaning process is highly automated. The cleaning medium is recycled, reducing energy consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the cleaning tank and its internal cleaning components (some components are not shown).

[0018] Figure 2 A schematic diagram of the cleaning component at one angle;

[0019] Figure 3 A structural diagram of the cleaning component from another angle (some components are not shown);

[0020] Figure 4 This is a schematic diagram of the overall structure of the crankshaft surface cleaning equipment.

[0021] The components are as follows: 1-cleaning tank; 2-large diameter clamping cylinder; 3-connecting plate; 4-guide rail; 5-large diameter center shaft; 6-first bearing; 7-large diameter center; 8-small diameter clamping cylinder; 9-small diameter center shaft; 10-second bearing; 11-small diameter center; 12-drive motor; 13-reducer; 14-synchronous belt; 15-crankshaft rotation drive cylinder; 16-crankshaft chuck; 17-synchronous belt drive pulley; 18-synchronous belt driven pulley; 19-main journal cleaning nozzle; 20-connecting rod diameter cleaning nozzle; 21-support connecting plate; 22-return oil tank; 23-clean liquid tank; 24-return oil filtration equipment; 25-return pipe; 26-oil pump; 27-inlet filtration equipment; 28-inlet pipe; 29-main journal cleaning pipe; 30-connecting rod diameter cleaning pipe; 31-air knife bracket; 32-crankshaft support plate. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0023] refer to Figures 1-4This utility model provides a crankshaft surface cleaning device, including a cleaning tank 1. A cleaning assembly is provided in the cleaning tank 1. The cleaning assembly includes a large diameter clamping assembly, a small diameter clamping assembly, a rotation drive assembly, a main shaft diameter cleaning assembly, and a connecting rod diameter cleaning assembly. The crankshaft cleaning station is located between the large diameter clamping assembly and the small diameter clamping assembly. The large diameter clamping assembly and the small diameter clamping assembly are used to clamp the large diameter end and the small diameter end of the crankshaft, respectively. The rotation drive assembly is used to drive the crankshaft to rotate. The main shaft diameter cleaning assembly and the connecting rod diameter cleaning assembly are respectively located on the front and rear sides of the crankshaft cleaning station and are used to clean the main shaft diameter and the connecting rod diameter of the crankshaft, respectively.

[0024] When cleaning the crankshaft surface using this invention, the crankshaft is first placed on the crankshaft cleaning station by a robotic arm. The large-diameter clamping assembly and the small-diameter clamping assembly start working, clamping the large-diameter and small-diameter ends of the crankshaft. The rotation drive assembly starts working, driving the crankshaft to rotate. The main shaft diameter cleaning assembly and the connecting rod diameter cleaning assembly start working, cleaning the main shaft diameter and connecting rod diameter of the crankshaft. After cleaning is completed, the main shaft diameter cleaning assembly, the connecting rod diameter cleaning assembly, and the rotation drive assembly stop working. The large-diameter clamping assembly and the small-diameter clamping assembly release the large-diameter and small-diameter ends of the crankshaft, and the robotic arm removes the crankshaft to proceed to the next process.

[0025] As a specific implementation of the rotation drive assembly, the rotation drive assembly includes a drive motor 12, a reducer 13, a synchronous belt 14, a crankshaft rotation drive cylinder 15, and crankshaft pawls 16. The drive motor 12 is connected to the reducer 13. The output end of the reducer 13 is provided with a synchronous belt drive pulley 17. A synchronous belt driven pulley 18 is fixedly provided on the outer side of one end of the crankshaft rotation drive cylinder 15. The synchronous belt 14 is sleeved between the synchronous belt drive pulley 17 and the synchronous belt driven pulley 18. The crankshaft rotation drive cylinder 15 passes through the first bearing 6. At least two crankshaft pawls 16 are connected to the other end of the crankshaft rotation drive cylinder 15. When the crankshaft is driven to rotate, the crankshaft pawls 16 are engaged on both sides of the crankshaft balance block.

[0026] When the crankshaft is driven to rotate, the drive motor 12 and the reducer 13 drive the synchronous belt drive pulley 17 to rotate. The synchronous belt drive pulley 17 drives the synchronous belt driven pulley 18 to rotate via the synchronous belt 14. The rotation of the synchronous belt driven pulley 18 drives the crankshaft rotation drive cylinder 15 to rotate. The crankshaft rotation drive cylinder 15 rotates within the first bearing 6, and drives the crankshaft chuck 16 to rotate. When the robot arm places the crankshaft, there is a fixed placement angle and path. After placement, the crankshaft chuck 16 fits precisely into the groove of the main journal at the end of the crankshaft. After the crankshaft is clamped by the large-diameter clamping assembly and the small-diameter clamping assembly, the rotation of the crankshaft chuck 16 drives the crankshaft to rotate. To provide better support, two first bearings 6 are provided.

[0027] To achieve a better connection, as an improvement to the technical solution, a support connecting plate 21 is provided in the cleaning tank 1. The reducer 13 is connected to the upper end of one side of the support connecting plate 21. The output end of the reducer 13 passes through the support connecting plate 21 and is connected to the synchronous belt drive pulley 17. The end of the crankshaft rotation drive cylinder 15 away from the crankshaft pawl 16 passes through the support connecting plate 21 and is connected to the synchronous belt driven pulley 18. The support connecting plate 21 is rotatably connected to the crankshaft rotation drive cylinder 15.

[0028] refer to Figure 3 The support connecting plate 21 has round holes on both the top and bottom. The reducer 13 is fixed on the side of the support connecting plate 21 near the crankshaft. Its output shaft extends out from the round hole on the top and is connected to the synchronous belt drive pulley 17. The end of the crankshaft rotation drive cylinder 15 away from the crankshaft passes through the hole on the bottom of the support connecting plate 21 and is fixedly connected to the synchronous belt driven pulley 18 on the outside. The crankshaft rotation drive cylinder 15 passes through the two first bearings 6 from below the reducer 13.

[0029] As a specific implementation of the large-diameter clamping assembly, the large-diameter clamping assembly and the rotation drive assembly are located on the same side. The large-diameter clamping assembly includes a large-diameter clamping cylinder 2, a connecting plate 3, a guide rail 4, and a large-diameter center shaft 5. The output end of the large-diameter clamping cylinder 2 is fixedly connected to the connecting plate 3. The lower side of the connecting plate 3 is slidably connected to the guide rail 4. The guide rail 4 is fixedly installed in the cleaning tank 1. The connecting plate 3 is engaged with the large-diameter center shaft 5. The crankshaft rotation drive cylinder 15 is sleeved on the outside of the large-diameter center shaft 5. The large-diameter center shaft 5 passes through the end of the crankshaft rotation drive cylinder 15 to form a large-diameter center 7.

[0030] During the clamping process of the large-diameter clamping assembly, the output end of the large-diameter clamping cylinder 2 retracts, pulling the connecting plate 3 to slide on the guide rail 4. The connecting plate 3 pulls the large-diameter tip shaft 5 towards the crankshaft. The large-diameter tip shaft 5 moves linearly within the crankshaft rotation drive cylinder 15, thereby driving the large-diameter tip 7 at its end to approach and clamp the large-diameter end of the crankshaft. The release process is the reverse of the above-described motion. To facilitate the linear motion of the large-diameter tip shaft 5 within the crankshaft rotation drive cylinder 15, a ball bearing connection is used between the crankshaft rotation drive cylinder 15 and the large-diameter tip shaft 5.

[0031] As a specific method for engaging the connecting plate 3 with the large-diameter center shaft 5, a groove with a diameter smaller than the diameter of the large-diameter center shaft 5 is provided at the connection position between the large-diameter center shaft 5 and the connecting plate 3. One end of the connecting plate 3 is provided with a connecting groove to accommodate the groove section of the large-diameter center shaft 5. The groove section of the large-diameter center shaft 5 is matched in the connecting groove of the connecting plate 3 to form an engagement. To facilitate the sliding of the connecting plate 3 on the guide rail 4, as an improvement, a slider is provided on the guide rail 4, and the upper surface of the slider is fixedly connected to the lower surface of the connecting plate 3.

[0032] As a specific implementation of the small-diameter clamping assembly, the small-diameter clamping assembly includes a small-diameter clamping cylinder 8, a small-diameter tip shaft 9, and a second bearing 10. The output end of the small-diameter clamping cylinder 8 is connected to the small-diameter tip shaft 9, and the small-diameter tip shaft 9 passes through the second bearing 10 to form a small-diameter tip 11 at the end of the small-diameter tip shaft 9.

[0033] During the process of clamping the small diameter end of the crankshaft, the output end of the small diameter clamping cylinder 8 extends out, and the small diameter tip shaft 9 moves linearly within the second bearing 10, driving the small diameter tip 11 to move towards the small diameter of the crankshaft, approaching and clamping the small diameter end of the crankshaft.

[0034] As a specific implementation of the spindle diameter cleaning assembly and the connecting rod diameter cleaning assembly, the spindle diameter cleaning assembly includes a plurality of spindle journal cleaning nozzles 19, which are connected together to a spindle journal cleaning tube 29. The connecting rod diameter cleaning assembly includes a plurality of connecting rod diameter cleaning nozzles 20, which are connected together to a connecting rod diameter cleaning tube 30.

[0035] The spray direction of each main journal cleaning nozzle 19 is aligned with each section of the crankshaft main journal. The cleaning oil is introduced into each main journal cleaning nozzle 19 from the main journal cleaning pipe 29 and sprayed out to clean each section of the crankshaft main journal. The spray direction of each connecting rod diameter cleaning nozzle 20 is aligned with each section of the crankshaft connecting rod diameter. The cleaning oil is introduced into each connecting rod diameter cleaning nozzle 20 from the connecting rod diameter cleaning pipe 30 and sprayed out to clean each section of the crankshaft connecting rod diameter.

[0036] As an improvement to the technical solution, the crankshaft surface cleaning equipment further includes an oil return tank 22 and a clean liquid tank 23 for supplying and recycling cleaning oil. The oil inlet at the upper end of the oil return tank 22 is connected to the oil outlet of the oil return filter 24, and the oil inlet of the oil return filter 24 is connected to the oil outlet of the return pipe 25. The oil inlet of the return pipe 25 is connected to the cleaning tank 1, and the entire length of the return pipe 25 from the oil inlet to the oil outlet is inclined downwards. The oil outlet of the clean liquid tank 23 is connected to the oil inlet of the oil pump 26, and the oil outlet of the oil pump 26 is connected to the oil inlet of the inlet filter 27. The oil outlet of the inlet filter 27 is connected to the oil inlet of the inlet pipe 28, and the oil outlet of the inlet pipe 28 is connected to the main journal cleaning pipe 29 and the connecting rod diameter cleaning pipe 30.

[0037] The cleaned oil flows from the cleaning tank 1 into the return pipe 25, and then from the return pipe 25 into the return oil filter 24. The oil is filtered in the return oil filter 24, and the filtered cleaning oil enters the return oil tank 22. The clean oil is drawn out of the clean liquid tank 23 by the oil pump 26, and then enters the inlet filter 27 for pre-cleaning filtration. After filtration, the oil enters the main shaft journal cleaning pipe 29 and the connecting rod diameter cleaning pipe 30 to supply liquid to each nozzle. Preferably, the return oil filter 24 is a magnetic roller separator.

[0038] To facilitate oil recovery, as an improvement, a partition is provided between the oil return tank 22 and the clean liquid tank 23, with the upper end of the partition not in contact with the top walls of the oil return tank 22 and the clean liquid tank 23. When the cleaning oil accumulates to a certain level, exceeding the partition, the clean cleaning fluid, after sedimentation, overflows back into the clean liquid tank 23.

[0039] To facilitate the placement of the crankshaft at the crankshaft cleaning station, as an improvement, crankshaft support plates 32 are respectively provided on the left and right sides of the crankshaft cleaning station. The robot arm places the crankshaft on the crankshaft support plates 32. After the large-diameter clamping assembly and the small-diameter clamping assembly clamp the large-diameter end and the small-diameter end of the crankshaft, there will be a certain gap between the crankshaft and the crankshaft support plate 32, so that friction will not occur between the crankshaft and the crankshaft support plate 32 during rotation, thus preventing wear of the crankshaft.

[0040] In order to rinse the cleaning fluid off the crankshaft after cleaning, an air knife bracket 31 is provided in the cleaning tank 1. An air knife 28 is installed on the air knife bracket 31. The air inlet of the air knife 28 is connected to a compressed air production device, and the air outlet of the air knife 28 faces the crankshaft cleaning station.

Claims

1. A crankshaft surface cleaning device, characterized in that, The system includes a cleaning tank (1), in which a cleaning assembly is provided. The cleaning assembly includes a large diameter clamping assembly, a small diameter clamping assembly, a rotation drive assembly, a main shaft diameter cleaning assembly, and a connecting rod diameter cleaning assembly. The crankshaft cleaning station is located between the large diameter clamping assembly and the small diameter clamping assembly. The large diameter clamping assembly and the small diameter clamping assembly are used to clamp the large diameter end and the small diameter end of the crankshaft, respectively. The rotation drive assembly is used to drive the crankshaft to rotate. The main shaft diameter cleaning assembly and the connecting rod diameter cleaning assembly are located on the front and rear sides of the crankshaft cleaning station, respectively, and are used to clean the main shaft diameter and the connecting rod diameter of the crankshaft.

2. The crankshaft surface cleaning equipment according to claim 1, characterized in that, The rotation drive assembly includes a drive motor (12), a reducer (13), a synchronous belt (14), a crankshaft rotation drive cylinder (15), and crankshaft pawls (16). The drive motor (12) is connected to the reducer (13). The output end of the reducer (13) is provided with a synchronous belt drive pulley (17). A synchronous belt driven pulley (18) is fixedly provided on the outer side of one end of the crankshaft rotation drive cylinder (15). The synchronous belt (14) is sleeved between the synchronous belt drive pulley (17) and the synchronous belt driven pulley (18). The crankshaft rotation drive cylinder (15) passes through the first bearing (6). At least two crankshaft pawls (16) are connected to the other end of the crankshaft rotation drive cylinder (15). The crankshaft pawls (16) engage with both sides of the crankshaft balance block when driving the crankshaft to rotate.

3. The crankshaft surface cleaning equipment according to claim 2, characterized in that, A support connecting plate (21) is provided in the cleaning tank (1). The reducer (13) is connected to the upper end of one side of the support connecting plate (21). The output end of the reducer (13) passes through the support connecting plate (21) and is connected to the synchronous belt drive pulley (17). The end of the crankshaft rotation drive cylinder (15) away from the crankshaft pawl (16) passes through the support connecting plate (21) and is connected to the synchronous belt driven pulley (18). The support connecting plate (21) is rotatably connected to the crankshaft rotation drive cylinder (15).

4. The crankshaft surface cleaning equipment according to claim 2, characterized in that, The large-diameter clamping assembly and the rotation drive assembly are located on the same side. The large-diameter clamping assembly includes a large-diameter clamping cylinder (2), a connecting plate (3), a guide rail (4), and a large-diameter tip shaft (5). The output end of the large-diameter clamping cylinder (2) is fixedly connected to the connecting plate (3). The lower side of the connecting plate (3) is slidably connected to the guide rail (4). The guide rail (4) is fixedly installed in the cleaning tank (1). The connecting plate (3) is engaged with the large-diameter tip shaft (5). The crankshaft rotation drive cylinder (15) is sleeved on the outside of the large-diameter tip shaft (5). The large-diameter tip shaft (5) passes through the end of the crankshaft rotation drive cylinder (15) to form a large-diameter tip (7).

5. The crankshaft surface cleaning equipment according to claim 4, characterized in that, A slot with a diameter smaller than that of the large diameter center shaft (5) is provided at the position where the large diameter center shaft (5) is connected to the connecting plate (3). One end of the connecting plate (3) is provided with a connecting groove to accommodate the slot section of the large diameter center shaft (5). The slot section of the large diameter center shaft (5) is matched in the connecting groove of the connecting plate (3) to form a snap-fit. A slider is provided on the guide rail (4), and the upper surface of the slider is fixedly connected to the lower surface of the connecting plate (3).

6. The crankshaft surface cleaning equipment according to claim 1, characterized in that, The small diameter clamping assembly includes a small diameter clamping cylinder (8), a small diameter tip shaft (9), and a second bearing (10). The output end of the small diameter clamping cylinder (8) is connected to the small diameter tip shaft (9), and the small diameter tip shaft (9) passes through the second bearing (10) to form a small diameter tip (11) at the end of the small diameter tip shaft (9).

7. The crankshaft surface cleaning equipment according to claim 1, characterized in that, The main shaft diameter cleaning assembly includes several main shaft journal cleaning nozzles (19), which are connected together to a main shaft journal cleaning tube (29). The connecting rod diameter cleaning assembly includes several connecting rod diameter cleaning nozzles (20), which are connected together to a connecting rod diameter cleaning tube (30).

8. The crankshaft surface cleaning equipment according to claim 7, characterized in that, The crankshaft surface cleaning equipment also includes an oil return tank (22) and a clean liquid tank (23). The oil inlet at the upper end of the oil return tank (22) is connected to the oil outlet of the oil return filter (24). The oil inlet of the oil return filter (24) is connected to the oil outlet of the return pipe (25). The oil inlet of the return pipe (25) is connected to the cleaning tank (1). The entire length of the return pipe (25) from the oil inlet to the oil outlet is inclined downwards. The oil outlet of the clean liquid tank (23) is connected to the oil inlet of the oil pump (26). The oil outlet of the oil pump (26) is connected to the oil inlet of the inlet filter (27). The oil outlet of the inlet filter (27) is connected to the oil inlet of the inlet pipe. The oil outlet of the inlet pipe is connected to the main journal cleaning pipe (29) and the connecting rod diameter cleaning pipe (30).

9. The crankshaft surface cleaning equipment according to claim 8, characterized in that, A partition is provided between the oil return tank (22) and the clean liquid tank (23), and the upper end of the partition does not contact the top wall of the oil return tank (22) and the clean liquid tank (23).

10. The crankshaft surface cleaning equipment according to claim 1, characterized in that, Crankshaft support plates (32) are provided on the left and right sides of the crankshaft cleaning station respectively; an air knife bracket (31) is provided in the cleaning tank (1), an air knife (28) is installed on the air knife bracket (31), the air inlet of the air knife (28) is connected to the compressed air production device, and the air outlet of the air knife (28) faces the crankshaft cleaning station.

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