Cleaning equipment in transmission shaft production line

Abstract

The invention relates to the technical field of transmission shaft cleaning, and discloses cleaning equipment in a transmission shaft production line, which comprises a plurality of ultrasonic cleaning pools, a support frame is arranged in each ultrasonic cleaning pool, a transition conveying belt is arranged between every two adjacent ultrasonic cleaning pools, and each support frame comprises a main lifting frame; two symmetrical secondary lifting supporting legs are further connected to the bottom of the main lifting frame in a lifting mode, the lifting directions of the two secondary lifting supporting legs are opposite, extension plates perpendicular to the lifting directions are fixedly arranged on the two extension plates, supporting pipes are arranged above the extension plates, the bottom of one side of each supporting pipe is rotationally connected to one extension plate, and the bottom of the other side of each supporting pipe is rotationally connected to the other extension plate. The bottom of the sliding block is rotationally connected to the other extension plate, and the sliding plane of the top face of the transition conveying belt is arranged to be an inclined face. The cleaning device has the advantages that the lifting supporting feet can shake to enable dirt to fall off more easily, and meanwhile the lifting supporting feet can enable the material frame to be automatically transferred to the next cleaning pool.

Description

Technical Field

[0001] The invention relates to the technical field of transmission shaft cleaning, in particular to cleaning equipment in a transmission shaft production line. Background Art

[0002] In industrial production, the cleanliness of the drive shaft has a crucial impact on its performance and service life. Common cleaning methods include spraying and ultrasonic cleaning. For example, a drive shaft cleaning device with patent publication number CN221869474U uses a spraying method to clean the drive shaft. However, the spraying method often leads to problems of incomplete and uneven cleaning. Ultrasonic cleaning, such as an ultrasonic rinsing device for drive shaft processing with patent publication number CN107413742A, mainly relies on the cavitation effect generated by ultrasonic waves in the cleaning liquid to remove dirt. Although the drive shaft is cleaned comprehensively and evenly, its cleaning strength is lower than that of the spraying method. In summary, there are still certain limitations in drive shaft cleaning.

[0003] On the one hand, relying solely on the effect of ultrasound will not be effective in cleaning some stubborn dirt attached to the surface of the transmission shaft. During the use of the transmission shaft, it will be contaminated with various complex oils, impurities, etc. Some dirt will be tightly attached to its surface, and it is difficult to completely remove it with simple ultrasonic cavitation.

[0004] On the other hand, during the cleaning process, multiple ultrasonic cleaning pools are required, such as an acid pool, an alkaline pool and a pure water pool for cleaning in sequence. The material frame needs to be transported between the multiple cleaning pools manually or by a robotic arm. The cost of a robotic arm is high, and manual operation affects efficiency while the cleaning agent can also cause harm to the human body. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides a cleaning device for a drive shaft production line, which has the advantages that the shaking of the lifting legs makes it easier for dirt to fall off, and the lifting legs can automatically transfer the material frame to the next cleaning pool, thereby solving the problems in the prior art of poor cleaning effect for some stubborn dirt attached to the surface of the drive shaft and the need for manual or robotic arm transportation of the material frame between multiple cleaning pools.

[0006] (II) Technical solution To achieve the above object, the present invention provides the following technical solutions: A cleaning device in a transmission shaft production line, comprising a plurality of ultrasonic cleaning pools arranged side by side, each ultrasonic cleaning pool being provided with a support frame, a transition conveyor belt being provided between two adjacent ultrasonic cleaning pools, any support frame comprising a main lifting frame liftingly connected to the ultrasonic cleaning pool, two symmetrical secondary lifting legs also being lifted and connected to the bottom of the main lifting frame, the lifting directions of the two secondary lifting legs being opposite, an extension plate perpendicular to the lifting direction being fixedly provided on the two secondary lifting legs, a support tube being provided above the extension plate, the bottom of one side of the support tube being rotatably connected to one of the extension plates, the bottom of the other side being provided with a sliding block connected in a sliding manner, the bottom of the sliding block being rotatably connected to the other extension plate, and the sliding plane of the top surface of the transition conveyor belt being provided as an inclined plane; After the support tube drags the material frame equipped with the transmission shaft into the ultrasonic cleaning tank, the two secondary lifting legs are controlled to lift and lower in opposite directions, so that the material frame shakes to promote the falling of dirt. After leaving the water surface after cleaning, shaking can also promote the falling of water stains. At the same time, the inclination angle of the support tube can be changed by controlling the secondary lifting legs, so that the material frame can slide by gravity to the next ultrasonic cleaning tank for the next cleaning, thereby realizing automatic cleaning.

[0007] Preferably, the support tube is a hollow tube, and two buoyancy blocks are symmetrically arranged on the front and rear sides of the support tube. When water is injected into the hollow tube of the support tube, the buoyancy blocks float up due to buoyancy and thus protrude upward from the upper surface of the support tube. After the water in the support tube is lost, the buoyancy blocks sink due to gravity and thus hide downward from the upper surface of the support tube. The purpose is to allow the support frame to drag the material frame into the cleaning liquid, and then the buoyancy blocks float up to limit the two sides of the material frame, thereby preventing the material frame from sliding on the support tube during the shaking of the material frame.

[0008] Preferably, the support tube is provided with an opening at one end in the forward direction of the material frame and a seal at the other end, and the liquid enters and exits the support tube through the opening; During the process of the support frame shaking the water on the material frame, the sealed end in the support tube is lower than the open end, and the liquid gathers at one end of the buoyancy block, causing the buoyancy block close to the sealed end to bulge upward, thereby limiting the material frame during the water shaking process. During the process of the support frame driving the material frame to tilt and allowing the material frame to enter the next ultrasonic cleaning tank, the sealed end is higher than the open end, and the remaining liquid in the support tube is discharged from the opening. At this time, the two buoyancy blocks lose their buoyancy and sink, thereby releasing the limit on the buoyancy blocks, allowing the material frame to slide in the forward direction. At the same time, the support frame in the next ultrasonic cleaning tank also presents a tilted state, and the open end of the support tube in the next ultrasonic cleaning tank is immersed in the cleaning liquid, causing the buoyancy block close to the opening to float up, thereby supporting the sliding material frame.

[0009] Preferably, the height of the inclined surface of the top surface of the transition conveyor belt on the side close to the material frame feeding is higher than the height on the side close to the material frame advancing direction, so that the material frame can slide forward better by gravity.

[0010] Preferably, the buoyancy block is made of hollow plastic material.

[0011] Preferably, four ultrasonic cleaning tanks are included, and each ultrasonic cleaning tank contains an acidic detergent, pure water, an alkaline detergent and pure water respectively, arranged in the forward direction of the material frame.

[0012] Preferably, a feeding conveyor belt is further provided in front of the first ultrasonic cleaning tank, a discharging conveyor belt is further provided behind the last ultrasonic cleaning tank, and a drying device is further provided behind the discharging conveyor belt, that is, at the very end of the conveyor belt.

[0013] Preferably, the drying device comprises a lifting platform and a drying blower box. The material frame enters the lifting platform through a discharge conveyor belt and then sinks into the drying blower box. The drying blower box dries the transmission shaft in the material frame by blowing out hot air.

[0014] Preferably, the feed conveyor belt, transition conveyor belt and discharge conveyor belt are all roller conveyor belts, and the rollers on the conveyor belts are driven to rotate by motors.

[0015] Preferably, the two secondary lifting legs are respectively connected to the two ends of a cable, a cable winding motor is fixed on the main lifting frame, a cable winding drum is fixed on the output shaft of the cable winding motor, the middle section of the cable is wound around the cable winding drum, and the two secondary lifting legs are controlled to lift in opposite directions by the forward and reverse rotation of the cable winding motor, and a corner roller is arranged in the main lifting frame at the place where the cable turns.

[0016] (III) Beneficial effects Compared with the prior art, the present invention provides a cleaning device in a transmission shaft production line, which has the following beneficial effects: 1. The cleaning equipment in the drive shaft production line is provided with two secondary lifting feet at the bottom of the support frame that is originally lifted and connected. By controlling the two secondary lifting feet to lift and lower in opposite directions, the material frame carried on the support tube is slightly shaken, which promotes the shedding of dirt attached to the drive shaft. At the same time, the structure can also shake the water after the material frame leaves the cleaning liquid to prevent the cleaning liquid from adhering to the drive shaft and entering the next cleaning liquid pool, especially when the two cleaning liquid pools have different acidity and alkalinity, thereby achieving the purpose of reducing the loss of cleaning liquid. In addition, the structure can also change the inclination angle of the support tube to make the material frame automatically slide to the support tube in the next ultrasonic cleaning pool, thereby realizing the function of automatic transportation.

[0017] 2. The cleaning equipment in the drive shaft production line sets the support tube as a hollow tube structure. After the cleaning liquid enters the support tube, the cleaning liquid is injected into the cavity of the support tube. Two buoyancy blocks are also set in the support tube. After water is injected, the buoyancy blocks float up due to buoyancy. The buoyancy blocks protrude from the top of the support tube, thereby limiting the material frame and preventing the material frame from sliding during shaking.

[0018] 3. The cleaning equipment in the drive shaft production line sets a seal and an opening at both ends of the support tube. When the support frame shakes the material frame with water, one end of the seal in the support tube is lower than one end of the opening, and the liquid gathers at one end of the buoyancy block so that the buoyancy block close to the seal end bulges upward, thereby limiting the material frame during the shaking process. When the support frame drives the material frame to tilt so that the material frame enters the next ultrasonic cleaning tank, one end of the seal is higher than one end of the opening, and the remaining liquid in the support tube is discharged from the opening. At this time, the two buoyancy blocks lose buoyancy and sink, thereby releasing the limit on the buoyancy blocks, so that the material frame slides in the forward direction. At the same time, the support frame in the next ultrasonic cleaning tank is also tilted, and the open end of the support tube in the next ultrasonic cleaning tank is immersed in the cleaning liquid, so that the buoyancy block close to the opening floats up, thereby supporting the sliding material frame. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram of area A in the middle.

[0021] Figure 3 It is a cross-sectional view of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the outer part of the support frame of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure inside the support frame of the present invention.

[0024] Figure 6 It is a schematic structural diagram of the bottom of the support tube of the present invention.

[0025] Figure 7 It is a cross-sectional view of the support tube of the present invention under normal conditions.

[0026] Figure 8 This is a cross-sectional view of the support tube of the present invention after the support tube has completely entered the cleaning liquid.

[0027] Fig. 9 It is a cross-sectional view of the support tube of the present invention when it is swinging after leaving the cleaning liquid.

[0028] Fig.10It is a cross-sectional view of the support tube of the present invention when the material frame is slid to the next ultrasonic cleaning tank.

[0029] In the figure: 1. ultrasonic cleaning tank; 2. support frame; 31. feed conveyor belt; 32. transition conveyor belt; 33. discharge conveyor belt; 4. drying device; 5. material frame; 21. main lifting frame; 22. secondary lifting support foot; 23. extension plate; 24. support pipe; 25. cable; 26. cable drum; 27. cable motor; 211. corner roller; 231. lower rotating seat; 232. upper rotating seat; 241. buoyancy block; 242. seal; 243. opening; 244. slope. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, a fixed connection refers to a connection in which there is no relative movement after the parts or components are fixed; a transmission connection refers to a connection method in which mechanical motion or torque is transmitted to other working parts through a transmission part; a sliding connection refers to a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotating connection refers to a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] Embodiment 1: This embodiment provides a cleaning device for a transmission shaft production line, which has the following technical features.

[0035] See also Figure 1-10 , a cleaning device in a transmission shaft production line, comprising four ultrasonic cleaning pools 1 arranged side by side, each ultrasonic cleaning pool 1 is respectively provided with a support frame 2, a transition conveyor belt 32 is provided between two adjacent ultrasonic cleaning pools 1, any support frame 2 comprises a main lifting frame 21 which is lifted and connected in the ultrasonic cleaning pool 1, the bottom of the main lifting frame 21 is also lifted and connected with two symmetrical secondary lifting legs 22, the lifting directions of the two secondary lifting legs 22 are opposite, an extension plate 23 which is perpendicular to the lifting direction is fixedly provided on the two secondary lifting legs 22, two support tubes 24 are provided above the extension plates 23, the bottom of one side of the support tube 24 is rotatably connected to one of the extension plates 23, a sliding block which is slidably connected is provided at the bottom of the other side, the bottom of the sliding block is rotatably connected to the other extension plate 23, and the sliding plane of the top surface of the transition conveyor belt 32 is provided as an inclined plane; After the support tube 24 drags the material frame 5 equipped with the transmission shaft into the ultrasonic cleaning tank 1, the two secondary lifting legs 22 are controlled to lift and lower in opposite directions, so that the material frame 5 shakes to promote the falling of dirt. After leaving the water surface after cleaning, shaking can also promote the falling of water stains. At the same time, the inclination angle of the support tube 24 can be changed by controlling the secondary lifting legs 22, so that the material frame 5 slides by gravity to the next ultrasonic cleaning tank 1 for the next cleaning, thereby realizing automatic cleaning.

[0036] It is further provided that the support tube 24 is a hollow tube, and two buoyancy blocks 241 are symmetrically arranged on the front and rear sides of the support tube 24. When water is injected into the hollow tube of the support tube 24, the buoyancy blocks 241 float up due to buoyancy and thus protrude upward from the upper surface of the support tube 24. After the water in the support tube 24 is lost, the buoyancy blocks 241 sink due to gravity and thus hide downward from the upper surface of the support tube 24. The purpose is to make the buoyancy blocks 241 float up to limit the two sides of the material frame 5 after the support frame 2 drags the material frame 5 into the cleaning liquid, thereby preventing the material frame 5 from sliding on the support tube 24 during the shaking of the material frame 5.

[0037] Further, an opening 243 is provided at one end of the support tube 24 in the forward direction of the material frame 5, and a sealing opening 242 is provided at the other end, and the liquid enters and exits the support tube 24 through the opening 243; During the process of the support frame 2 shaking the material frame 5 with water, one end of the seal 242 in the support tube 24 is lower than one end of the opening 243, and the liquid gathers at one end of the buoyancy block 241, so that the buoyancy block 241 near the end of the seal 242 bulges upward, limiting the material frame 5 during the shaking process. During the process of the support frame 2 driving the material frame 5 to tilt so that the material frame 5 enters the next ultrasonic cleaning tank 1, one end of the seal 242 is higher than one end of the opening 243, and the remaining liquid in the support tube 24 is discharged from the opening 243. At this time, the two buoyancy blocks 241 lose buoyancy and sink, thereby releasing the limit on the buoyancy blocks 241, so that the material frame 5 slides in the forward direction. At the same time, the support frame 2 in the next ultrasonic cleaning tank 1 is also tilted, and one end of the opening 243 of the support tube 24 in the next ultrasonic cleaning tank 1 is immersed in the cleaning liquid, so that the buoyancy block 241 near the opening 243 floats up, thereby supporting the sliding material frame 5.

[0038] It is further provided that the height of the inclined surface of the top surface of the transition conveyor belt 32 is higher on the side close to the feeding direction of the material frame 5 than on the side close to the advancing direction of the material frame 5, so that the material frame 5 can slide forward better by gravity.

[0039] It is further provided that the buoyancy block 241 is made of hollow plastic material.

[0040] Further, it is provided with four ultrasonic cleaning tanks 1 , each of which contains an acidic cleaning agent, pure water, an alkaline cleaning agent and pure water respectively, arranged in the forward direction of the material frame 5 .

[0041] It is further provided that a feeding conveyor belt 31 is included in front of the first ultrasonic cleaning tank 1, and a discharging conveyor belt 33 is included behind the last ultrasonic cleaning tank 1. A drying device 4 is also provided behind the discharging conveyor belt 33, that is, at the very end of the conveyor belt.

[0042] It is further provided that the drying device 4 includes a lifting platform and a drying blower box. The material frame 5 enters the lifting platform through the discharge conveyor belt 33 and then sinks into the drying blower box. The drying blower box dries the transmission shaft in the material frame 5 by blowing out hot air.

[0043] It is further provided that the feed conveyor belt 31, the transition conveyor belt 32 and the discharge conveyor belt 33 are all roller conveyor belts, and the rollers on the conveyor belts are driven to rotate by motors.

[0044] It is further configured that the two secondary lifting legs 22 are respectively connected to the two ends of a cable 25, a cable winding motor 27 is fixed on the main lifting frame 21, a cable winding drum 26 is fixed on the output shaft of the cable winding motor 27, the middle section of the cable 25 is wound around the cable winding drum 26, and the two secondary lifting legs 22 are lifted and lowered in opposite directions by the forward and reverse rotation of the cable winding motor 27, and a corner roller 211 is arranged in the main lifting frame 21 at the place where the cable 25 turns a corner.

[0045] It is further provided that an ultrasonic generator is provided on the inner wall of the ultrasonic cleaning tank 1 .

[0046] Furthermore, a liquid inlet and outlet are provided in the ultrasonic cleaning tank 1 for replacing the cleaning liquid.

[0047] Furthermore, a heating device is provided in the ultrasonic cleaning tank 1 to increase the temperature of the cleaning liquid.

[0048] It is further provided that each support frame 2 is fixed on a different lifting plate, each lifting plate passes through a guide rail and a lead screw, one end of the lead screw is connected to the output shaft of the motor, and the lead screw is driven to rotate by the motor to control the lifting of the lifting plate.

[0049] Furthermore, a slope 244 is provided on the inner wall of the bottom of the support tube 24 near the opening 243 to prevent the liquid in the support tube 24 from escaping from the support tube 24 due to shaking during the shaking process.

[0050] It is further provided that at least two support tubes 24 are provided between the two extension plates 23 .

[0051] It is further configured that a lower rotating seat 231 is fixed to the extension plate 23 by bolts, and each lower rotating seat 231 is rotatably connected to an upper rotating seat 232. The top of one of the upper rotating seats 232 on the two extension plates 23 is fixed to the bottom of one side of the support tube 24 by bolts, and the top of the other upper rotating seat 232 is slidably connected to the bottom of the other side of the support tube 24.

[0052] To sum up, the cleaning equipment in the drive shaft production line is further provided with two secondary lifting legs 22 at the bottom of the originally lifting support frame 2. By controlling the two secondary lifting legs 22 to lift in opposite directions, the material frame 5 carried on the support tube 24 is caused to shake slightly, thereby promoting the shedding of dirt attached to the drive shaft. At the same time, the structure can also shake the water after the material frame 5 leaves the cleaning liquid, thereby preventing the cleaning liquid from adhering to the drive shaft and entering the next cleaning liquid pool, especially when the two cleaning liquid pools have different acidity and alkalinity, thereby achieving the purpose of reducing the loss of cleaning liquid. Moreover, the structure can also change the inclination angle of the support tube 24 so that the material frame 5 automatically slides to the support tube 24 in the next ultrasonic cleaning pool 1, thereby realizing the function of automatic transportation.

[0053] The cleaning equipment in the transmission shaft production line is configured such that the support tube 24 is formed into a hollow tube structure. After the cleaning liquid enters the support tube 24, the cleaning liquid is injected into the cavity of the support tube 24. Two buoyancy blocks 241 are also provided in the support tube 24. After water is injected, the buoyancy blocks 241 float upward by buoyancy. The buoyancy blocks 241 protrude from above the support tube 24, thereby limiting the material frame 5 and preventing the material frame 5 from sliding during shaking.

[0054] The cleaning equipment in the transmission shaft production line is provided with a seal 242 and an opening 243 at both ends of the support tube 24. When the support frame 2 shakes the material frame 5 with water, one end of the seal 242 in the support tube 24 is lower than one end of the opening 243, and the liquid is collected at one end of the buoyancy block 241 so that the buoyancy block 241 close to one end of the seal 242 bulges upward, limiting the position of the material frame 5 during the shaking process. When the support frame 2 drives the material frame 5 to tilt so that the material frame 5 enters the next ultrasonic cleaning tank 1, the seal 242 is lower than one end of the opening 243. One end of 242 is higher than one end of the opening 243, and the remaining liquid in the support tube 24 is discharged from the opening 243. At this time, the two buoyancy blocks 241 lose their buoyancy and sink, thereby releasing the limit on the buoyancy blocks 241, so that the material frame 5 slides in the forward direction. At the same time, the support frame 2 in the next ultrasonic cleaning tank 1 is also tilted, and one end of the opening 243 of the support tube 24 in the next ultrasonic cleaning tank 1 is immersed in the cleaning liquid, so that the buoyancy block 241 close to the opening 243 floats up, thereby supporting the sliding material frame 5.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cleaning device for a transmission shaft production line, comprising a plurality of ultrasonic cleaning tanks (1) arranged side by side, each ultrasonic cleaning tank (1) being provided with a support frame (2), and a transition conveyor belt (32) being provided between two adjacent ultrasonic cleaning tanks (1), characterized in that: Any support frame (2) includes a main lifting frame (21) that is lifted and connected in the ultrasonic cleaning tank (1), and the bottom of the main lifting frame (21) is also lifted and connected with two symmetrical secondary lifting legs (22), and the lifting directions of the two secondary lifting legs (22) are opposite; An extension plate (23) perpendicular to the lifting direction is fixedly provided on the two secondary lifting legs (22), a support tube (24) is provided above the extension plate (23), the bottom of one side of the support tube (24) is rotatably connected to one of the extension plates (23), and a sliding block is provided at the bottom of the other side, and the bottom of the sliding block is rotatably connected to the other extension plate (23), and the sliding plane of the top surface of the transition conveyor belt (32) is set as an inclined plane.

2. The cleaning device in a transmission shaft production line according to claim 1, characterized in that: The support tube (24) is a hollow tube. Two buoyancy blocks (241) are symmetrically arranged on the front and rear sides of the support tube (24). When water is injected into the hollow tube of the support tube (24), the buoyancy blocks (241) float upward due to buoyancy and thus protrude upward from the upper surface of the support tube (24). After the water in the support tube (24) is lost, the buoyancy blocks (241) sink downward due to gravity and thus hide downward from the upper surface of the support tube (24).

3. The cleaning device in a transmission shaft production line according to claim 2, characterized in that: The support tube (24) is provided with an opening (243) at one end located in the forward direction of the material frame (5), and a sealing opening (242) at the other end, and liquid enters and exits the support tube (24) through the opening (243).

4. The cleaning device in a transmission shaft production line according to claim 3, characterized in that: The height of the inclined surface of the top surface of the transition conveyor belt (32) on the side close to the material frame (5) is higher than the height on the side close to the advancing direction of the material frame (5).

5. The cleaning device in a transmission shaft production line according to claim 3, characterized in that: The buoyancy block (241) is made of hollow plastic material.

6. The cleaning device in a transmission shaft production line according to claim 3, characterized in that: It comprises four ultrasonic cleaning tanks (1), each of which contains an acidic cleaning agent, pure water, an alkaline cleaning agent and pure water respectively, arranged in the forward direction of the material frame (5).

7. The cleaning device in a transmission shaft production line according to claim 3, characterized in that: A feeding conveyor belt (31) is also provided in front of the first ultrasonic cleaning tank (1), and a discharging conveyor belt (33) is also provided behind the last ultrasonic cleaning tank (1). A drying device (4) is also provided behind the discharging conveyor belt (33), i.e., at the end of the conveyor belt.

8. The cleaning device in a transmission shaft production line according to claim 7, characterized in that: The drying device (4) comprises a lifting platform and a drying blower box. The material frame (5) enters the lifting platform through a discharge conveyor belt (33) and then sinks into the drying blower box. The drying blower box dries the transmission shaft in the material frame (5) by blowing out hot air.

9. The cleaning device in a transmission shaft production line according to claim 7, characterized in that: The feed conveyor belt (31), the transition conveyor belt (32) and the discharge conveyor belt (33) are all roller conveyor belts, and the rollers on the conveyor belts are driven to rotate by motors.

10. The cleaning device in a transmission shaft production line according to claim 3, characterized in that: Two ends of a cable (25) are respectively connected to the two secondary lifting legs (22); a cable winding motor (27) is fixed to the main lifting frame (21); a cable winding drum (26) is fixed to the output shaft of the cable winding motor (27); a middle section of the cable (25) is wound around the cable winding drum (26); the two secondary lifting legs (22) are lifted and lowered in opposite directions by the forward and reverse rotation of the cable winding motor (27); and a corner roller (211) is provided in the main lifting frame (21) at a corner where the cable (25) turns.

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