A conveying device for the surface treatment of diesel engine connecting rods

Abstract

This invention relates to the technical field of diesel engine connecting rod surface treatment equipment, and particularly to a conveying device for diesel engine connecting rod surface treatment; it includes a hanging rail, a frame, a trolley, and a suspension mechanism. The hanging rail is positioned above the frame, and a treatment groove is provided on the upper side of the frame. The trolley is slidably mounted on the hanging rail. The suspension mechanism is connected to the trolley via a lifting drive component, which drives the suspension mechanism to move up and down. It also includes an elastic vibration element and vibration rails mounted on both sides of the frame. The output end of the lifting drive component is elastically connected to the suspension mechanism via the elastic vibration element. The vibration rails have multiple evenly distributed conical protrusions. This ensures that the entire surface of the connecting rod is treated under more consistent conditions, resulting in a more uniform dissolution rate and surface finish. Defects such as streaks, pitting, and clouding caused by bubble retention or uneven current are significantly reduced during the moving process.

Description

Technical Field

[0001] This invention relates to the technical field of diesel engine connecting rod surface treatment equipment, and in particular to a conveying device for diesel engine connecting rod surface treatment. Background Technology

[0002] Connecting rods are an important component of diesel engines, used to connect the piston and crankshaft. After initial machining, connecting rods need to undergo polishing, cleaning, and other processes. Some connecting rods also require spraying or immersion to form a protective film or reinforcing layer on their surface.

[0003] To improve the service life of connecting rods, the surface treatment of the connecting rods needs to be very uniform, especially the treatment of the toothed mating surfaces of diesel engine connecting rods. For ease of connection, the connecting rod has a separate structure at the through hole at the large end, connecting the rod body and the rod cap. The mating surface between the rod body and the rod cap is usually designed as a toothed mating surface. Many burrs are generated during the machining of this toothed mating surface. To ensure a tight fit, the mating surface must be deburred and cleaned. This necessitates a conveying device capable of carrying the connecting rod through a treatment device containing polishing fluid, cleaning fluid, or other treatment fluids to complete the treatment of the connecting rod surface, especially the toothed mating surface.

[0004] Previously, in order to ensure that the toothed mating surfaces fully contact the treatment fluid, the rod body and rod cap were usually treated separately, or a specially made jig was required. For example, the utility model with publication number CN204546271U discloses a grinding jig for the toothed mating surfaces of connecting rods in medium-speed marine diesel engines. The left side of the jig body is the connecting rod body mounting area, and the right side of the jig body is the connecting rod cap mounting area, so that the rod body and rod cap can be clamped and treated at the same time. However, when using the treatment fluid to treat the surface of the connecting rod, it is often necessary to treat other parts of the connecting rod as well. The jig will cause the clamped part of the connecting rod to not be able to contact the treatment fluid.

[0005] Patent application CN120589386A discloses a hoisting conveying device for an ultrasonic cleaning machine, including a hoisting conveying component. The lower end of the hoisting conveying component is connected to a pre-reserved docking component via a transmission component. This pre-reserved docking component docks with the outer side of the workpiece to be processed for conveying. This hoisting conveying device for the ultrasonic cleaning machine, in conjunction with the drive of the hoisting conveying component, suspends and conveys the workpiece. Compared to clamps, the contact area between the lifting conveyor structure and the connecting rod is smaller, which is more conducive to the treatment of the connecting rod surface by the treatment fluid. However, in some treatments such as electrolytic polishing, cleaning, or coating of the connecting rod, the treatment effect is highly dependent on the uniformity of the treatment fluid near the workpiece surface. When the connecting rod is immersed in the treatment fluid for static treatment by the lifting conveyor, especially when energized, the treatment fluid will generate bubbles and heat. If the connecting rod is in a static state, the treatment fluid near the connecting rod surface will quickly become "stale". Bubbles are easy to adhere to the connecting rod surface to form cavitation or streaks. The accumulation of reaction products will lead to uneven treatment of the connecting rod surface (easy to show bright and dark streaks, pitting). Moreover, when the connecting rod is static, the phenomenon of uneven current distribution will be more obvious, resulting in over-treatment of edges and corners, while the concave or distant areas from the cathode will be under-treated, affecting the overall quality of the connecting rod. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a conveying device for surface treatment of connecting rods in diesel engines. This device enables surface treatment of the connecting rods during movement, and the connecting rods vibrate with the elastic vibrating element, thereby improving the concentration and temperature uniformity of the treatment fluid. This ensures that all parts of the connecting rods are in uniform and sufficient contact with the treatment fluid, resulting in a more uniform surface finish.

[0007] To achieve the above objectives, in a first aspect, the present invention provides the following technical solution: a conveying device for surface treatment of connecting rods of a diesel engine, used for conveying connecting rods, the connecting rods including a rod body and through holes at both ends of the rod body; the conveying device includes a hanging rail, a frame, a trolley, and a suspension mechanism, the hanging rail being disposed above the frame, a treatment groove being provided on the upper side of the frame, the trolley being slidably mounted on the hanging rail, and the suspension mechanism being connected to the trolley via a lifting drive component, the lifting drive component being used to drive the suspension mechanism to move up and down;

[0008] It also includes an elastic vibration starter and vibration starter rails installed on both sides of the frame. The output end of the lifting drive is elastically connected to the suspension mechanism through the elastic vibration starter. The vibration starter rails are provided with multiple evenly distributed conical protrusions. After the lifting drive drives the suspension mechanism to descend, it contacts the vibration starter rails, causing the connecting rod to vibrate.

[0009] The hanging rail is located above the middle of the processing tank and is arranged parallel to the processing tank. The trolley is a hanging rail type traveling trolley, and the trolley has its own power mechanism to move along the hanging rail.

[0010] The elastic vibration starter can be a spring alone, or other equivalent components with a certain elastic support effect; the tip of the conical protrusion is rounded.

[0011] Preferably, the elastic vibration starter includes a frame and elastic connectors installed on both sides of the bottom of the frame. The elastic connectors include two vertically arranged connecting rods, an L-shaped frame, and a connecting spring. One end of each connecting rod is hinged to the frame, and the other end of each connecting rod is hinged to the L-shaped frame. The top of the connecting spring is fixedly connected to the frame, and the bottom of the connecting spring is fixedly connected to the L-shaped frame.

[0012] Furthermore, the output end of the lifting drive component is fixedly connected to the top of the frame, and the four hinge points of the two connecting rods, the frame, and the L-shaped frame are arranged to form a parallelogram. The mounting crossbeam is installed at the bottom of the beam frame.

[0013] Preferably, guide rails are also installed on both sides of the frame, the vibration starter rail is located above the guide rails, and the vibration starter rail is connected to an avoidance mechanism for driving the vibration starter rail to rotate and shift.

[0014] Furthermore, the drive cylinder can be an electric telescopic cylinder, a hydraulic telescopic cylinder, or a pneumatic telescopic cylinder, and the extension and retraction of the drive cylinder can be provided by an external municipal power supply, hydraulic system, or pneumatic system.

[0015] Preferably, the avoidance mechanism includes a mounting base fixedly connected to the frame, a rotating frame hingedly mounted on the mounting base, and a drive cylinder that provides power for the rotation of the rotating frame. One end of the drive cylinder is hinged to the mounting base, and the other end of the drive cylinder is hinged to the rotating frame. The vibration starter rail is mounted on the top of the rotating frame.

[0016] Preferably, the suspension mechanism includes a beam frame, a first suspension assembly, and a second suspension assembly. The beam frame is connected to an elastic vibration starter. The first suspension assembly and the second suspension assembly are disposed on the lower side of the beam frame. The first suspension assembly and the second suspension assembly pass through two through holes of the connecting rod, respectively.

[0017] A pusher is also provided in the processing tank or on the suspension mechanism, which is used to push the connecting rod on the first suspension assembly to the second suspension assembly.

[0018] Furthermore, the lifting drive component is preferably an electric telescopic cylinder, and the beam frame is installed at the output end of the electric telescopic cylinder. The lifting drive component can also be a mechanical slide, a scissor lift mechanism, or other equivalent components that can drive the beam frame to lift.

[0019] Preferably, the first suspension assembly includes a first hanger, on which a first horizontally arranged first rod is provided, and the first rod is inserted into a set of through holes at the upper part of the rod body;

[0020] The second suspension assembly includes a second hanger, on which a second hanger is provided, which is arranged parallel to the first hanger and located below the first hanger. The second hanger is inserted into a through hole at the lower part of the connecting rod, and the outer diameter of the second hanger is smaller than the inner diameter of the corresponding through hole.

[0021] Furthermore, when the connecting rod is suspended at the first hanger, the central axis of the second hanger coincides with the central axis of the corresponding through hole on the connecting rod. The outer diameter of the first and second hangers can be 1 / 3 to 1 / 2 of the inner diameter of the corresponding through hole. The pushing component can be a pushing plate and a telescopic cylinder. The pushing plate is installed at the output end of the telescopic cylinder. By activating the telescopic cylinder, the pushing plate pushes the corresponding connecting rod from the first hanger to the second hanger. The first hanger, the first hanger, and the corresponding mounting rod are integrally connected. The second hanger, the second hanger, and the corresponding mounting rod are integrally connected.

[0022] Preferably, the top center of the beam frame is hinged to the elastic vibration starter, and the bottom of the beam frame is provided with a mounting crossbeam. The mounting crossbeam is provided with two mounting rods arranged side by side. The first hanger is fixedly connected to one of the mounting rods, and the second hanger is fixedly connected to the other mounting rod.

[0023] Preferably, the pusher includes multiple liquid distribution pipes installed on the lower part of the inner wall of one side of the treatment tank and a circulation pump installed on the frame. The output end of the circulation pump extends into the treatment tank and is connected to the input end of the multiple liquid distribution pipes. Each output end of the multiple liquid distribution pipes is equipped with a right-angle nozzle, and the output end of the right-angle nozzle faces the corresponding connecting rod side.

[0024] Furthermore, multiple right-angle nozzles are arranged corresponding to the connecting rods on multiple first hangers.

[0025] Preferably, the input end of the circulating pump extends into the bottom of the treatment tank on the side away from the liquid distribution pipe.

[0026] Preferably, the end of the second rod is provided with an upward-facing blocking rod, the length of which is less than the inner diameter of the through hole.

[0027] Secondly, the present invention also provides an apparatus for deburring the toothed mating surface of a diesel engine connecting rod, comprising the aforementioned conveying device for surface treatment of the diesel engine connecting rod, a vibrating rail connected to the positive terminal of an external power source, a treatment tank connected to the negative terminal of an external power source, the connecting rod body and the rod cap being connected by bolts, and the toothed mating surfaces on the connecting rod body and the rod cap being spaced apart.

[0028] An electric heater is installed at the bottom of the treatment tank, which is used to heat the electrolyte in the treatment tank.

[0029] Preferably, the toothed mating surfaces are spaced at least 2 cm apart.

[0030] Furthermore, the upper end of the bolt is threaded to the rod body, and the lower diameter of the bolt is smaller than the diameter of the connecting hole on the rod cap.

[0031] Furthermore, the first hanger, the second hanger, the first rod, and the second rod are all made of conductive copper.

[0032] Furthermore, the first suspension assembly is provided with a clamping mechanism for holding the connecting rod. The clamping mechanism can ensure that the connecting rod reliably contacts the first suspension assembly, preventing poor contact between the connecting rod and the first suspension assembly during vibration, which would cause intermittent power supply and ensure continuous electropolishing.

[0033] Furthermore, the clamping mechanism includes a clamping rod, a clamping spring, and a clamping release drive. The clamping rod is rotatably mounted on the first suspension assembly, and the clamping spring is disposed between the first suspension assembly and the clamping rod. The clamping spring causes one end of the clamping rod to press against the connecting rod on the first suspension assembly. One end of the clamping release drive is connected to the mounting crossbeam, and the other end corresponds to the other end of the clamping rod.

[0034] Specifically, the clamping release drive component is a clamping release cylinder. One end of the clamping release cylinder is fixedly connected to the mounting frame, and the other end is located on the upper side of the other end of the clamping rod. After the clamping release cylinder is activated, the piston rod of the cylinder pushes the clamping rod to swing, thereby disengaging the clamping rod from the connecting rod.

[0035] Alternatively, the clamping mechanism includes a clamping rod and a clamping release drive, the clamping rod being rotatably mounted on the first suspension assembly, one end of the clamping release drive being rotatably connected to the mounting crossbeam, and the other end being rotatably connected to the clamping rod.

[0036] Preferably, one end of the clamping rod is provided with an arc-shaped clamp for clamping the connecting rod. One end of the connecting rod is clamped between the arc-shaped clamp and the first lifting rod, ensuring a reliable connection between the connecting rod and the first lifting rod.

[0037] Thirdly, the present invention also provides a process for deburring the toothed mating surface of a diesel engine connecting rod, comprising the following steps:

[0038] 1) The connecting rod is suspended on the suspension mechanism. The rod body and the rod cover are connected by bolts, and the toothed mating surfaces on the rod body and the rod cover are spaced apart.

[0039] 2) The lifting drive unit moves the suspension mechanism down until the installation crossbeam falls onto the vibration track. The toothed mating surfaces of the connecting rod body and the rod cover are immersed in the electrolyte in the treatment tank, and the toothed mating surfaces and the inner wall of the through hole at the bottom of the connecting rod are electrolytically polished.

[0040] Preferably, the suspension mechanism includes a beam frame, a first suspension assembly, and a second suspension assembly, wherein the first suspension assembly and the second suspension assembly are respectively connected to two through holes of a connecting rod;

[0041] The processing tank is also equipped with a pusher, which is used to push the connecting rod on the first suspension assembly to the second suspension assembly.

[0042] In step 1), the through hole at the upper part of the connecting rod is suspended on the first suspension assembly, and the through hole at the lower part of the connecting rod is sleeved on the outside of the second suspension assembly, with the through hole and the second suspension assembly spaced apart.

[0043] It also includes step 3), after the toothed mating surface and the inner wall of the through hole at the bottom of the connecting rod are electrolytically polished in step 2), the pusher moves the connecting rod on the first suspension assembly to the second suspension assembly, so that the connecting rod is separated from the first suspension assembly and the connecting rod is only suspended on the second suspension assembly, and the inner wall of the other through hole of the connecting rod is electrolytically polished.

[0044] Preferably, in step 1), the trolley slides back and forth on the hanging rail, the mounting frame and the vibration starting rail are always in contact, and the connecting rod vibrates up and down while moving back and forth in the processing groove.

[0045] Compared with the prior art, the present invention provides a conveying device for surface treatment of diesel engine connecting rods, which has the following beneficial effects: In this conveying device for surface treatment of diesel engine connecting rods, the lifting drive component drives the suspension mechanism to move downward, and the connecting rod is fully or partially immersed in the treatment liquid in the treatment tank. The suspension mechanism contacts the vibration track, causing the connecting rod to vibrate up and down in the treatment liquid, thereby achieving full agitation of the treatment liquid. This forces the treatment liquid to flow on its surface, carrying away bubbles, reaction products and heat more quickly. At the same time, it brings fresh treatment liquid with uniform concentration and temperature to the surface of the connecting rod, ensuring that the entire surface of the connecting rod is treated under more consistent conditions. This results in a more uniform dissolution rate and surface smoothness. Defects such as streaks, pitting, and clouding caused by bubble retention or uneven current are significantly reduced during the moving state.

[0046] At the same time, the trolley slides back and forth from the hanging rail, further agitating the treatment liquid, making the treatment liquid more uniform, thereby obtaining a more uniform dissolution rate and surface smoothness. Attached Figure Description

[0047] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0048] Figure 2 This is a schematic diagram of the right-side planar structure of the present invention.

[0049] Figure 3 This is a top-view planar structural diagram of the present invention.

[0050] Figure 4 This is the invention Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0051] Figure 5 This is the invention Figure 2 Schematic diagram of the cross-sectional structure at point BB.

[0052] Figure 6 This is a schematic diagram showing the positional relationship between the right-angle nozzle and the corresponding connecting rod in the linkage position switching state of the present invention.

[0053] Figure 7 This is the invention Figure 2 A magnified schematic diagram of the structure at point C.

[0054] Figure 8 This is the invention Figure 4 A magnified schematic diagram of the structure at point D.

[0055] Figure 9 This is the invention Figure 5 A magnified schematic diagram of the structure at point E in the middle.

[0056] Figure 10 This is a schematic diagram of the clamping mechanism of the present invention.

[0057] The attached diagram shows the following components: 1. Frame; 2. Processing tank; 3. Hanging rail; 4. Trolley; 5. Lifting drive component; 6. Guide rail; 7. Rod; 8. Rod cover; 9. Beam frame; 10. Mounting crossbeam; 11. First hanger; 12. First lifting rod; 13. Vibration starting rail; 14. Conical protrusion; 15. Frame; 16. Connecting rod; 17. L-shaped frame; 18. Connecting spring; 19. Mounting rod; 20. Mounting seat; 21. Rotating frame; 22. Drive cylinder; 23. Second hanger; 24. Second lifting rod; 25. Liquid distribution pipe; 26. Circulating pump; 27. Right-angle nozzle; 28. Blocking vertical rod; 29. ​​Electric heater; 30. Through hole; 31. Bolt; 32. Clamping rod; 33. Arc-shaped clamp; 34. Clamping spring; 35. Clamping release cylinder. Detailed Implementation

[0058] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0059] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the embodiments of the present invention can be combined with each other.

[0060] Example 1

[0061] Please refer to Figure 1-5A conveying device for surface treatment of connecting rods in diesel engines is disclosed. The connecting rod includes a rod body 7 and a rod cap 8. The rod cap 8 is connected to the lower part of the rod body 7, and a through hole 30 is formed between the rod body 7 and the rod cap 8. The upper end of the rod body 7 also has an integrally formed through hole 30. The mating surface between the rod body 7 and the rod cap 8 is a toothed mating surface. The conveying device includes a frame 1, a hanging rail 3, a trolley 4, a lifting drive component 5, and a suspension mechanism. The hanging rail 3 is horizontally arranged above the frame 1. The trolley 4 is slidably mounted on the hanging rail 3. The suspension mechanism is mounted on the trolley 4 via the lifting drive component 5, which is used to drive the suspension mechanism to move up and down.

[0062] The frame 1 has an upward-opening processing tank 2, and the hanging rail 3 is set along the length of the processing tank 2. The trolley 4 is a hanging rail type traveling trolley, and the trolley 4 has its own power mechanism to move along the hanging rail 3; specifically, the power mechanism can be a motor-driven traveling wheel rotation method, the traveling wheel is mounted on the trolley 4, and the traveling wheel drives the trolley 4 to move along the hanging rail 3.

[0063] The suspension mechanism includes a beam frame 9, a mounting crossbeam 10 installed at the bottom of the beam frame 9, and a plurality of first hangers 11 fixedly connected to the mounting crossbeam 10. The first hangers 11 are provided with horizontally arranged first hangers 12, which are inserted into a set of through holes 30 at the upper part of the rod body 7.

[0064] The lifting drive component 5 is preferably an electric telescopic cylinder, and the beam frame 9 is installed at the output end of the electric telescopic cylinder. The lifting drive component 5 can also be a mechanical slide, scissor lift mechanism, or other equivalent components that can drive the beam frame 9 to lift.

[0065] Guide rails 6 are installed on both sides of the frame 1, with two guide rails 6 respectively located on both sides of the processing tank 2. A vibration starter rail 13 is also provided above the guide rails 6, with multiple evenly distributed conical protrusions 14 on the vibration starter rail 13; the tips of the conical protrusions 14 are rounded. The vibration starter rail 13 is connected to a clearance mechanism for rotating and shifting the vibration starter rail 13. Depending on the process required to treat the connecting rod surface, the lifting drive 5 drives the mounting frame 10 to contact the guide rails 6 and the vibration starter rail 13 respectively. In some surface treatments that do not require vibration, such as when spraying a protective oil film onto the connecting rod surface, the vibration starter rail 13 is swung to one side of the guide rail 6, and the trolley 4 drives the mounting frame 10 to move along the guide rail 6, making it more stable.

[0066] When linkage vibration is required, the mounting crossbeam 10 contacts the vibration starting track 13. For example, when it is used for electrolytic polishing or when residual cleaning fluid needs to be shaken off after cleaning, the output end of the lifting drive 5 is elastically connected to the beam frame 9 through the elastic vibration starter, and the mounting crossbeam 10 contacts the vibration starting track 13.

[0067] Please refer to Figure 2The obstacle avoidance mechanism includes a mounting base 20 fixedly connected to the frame 1, a rotating frame 21 hinged to the mounting base 20, and a drive cylinder 22 that provides power for the rotation of the rotating frame 21. One end of the drive cylinder 22 is hinged to the mounting base 20, and the other end of the drive cylinder 22 is hinged to the rotating frame 21. The vibration track 13 is installed on the top of the rotating frame 21. Furthermore, the drive cylinder 22 can be an electric telescopic cylinder, a hydraulic telescopic cylinder, or a pneumatic telescopic cylinder, and the extension and retraction of the drive cylinder 22 can be provided by an external municipal power supply, hydraulic system, or pneumatic system.

[0068] For details, please refer to Figure 6 as well as Figures 8-9 The elastic vibrating element includes a frame 15 and elastic connecting parts installed on both sides of the bottom of the frame 15. The elastic connecting parts include two vertically arranged connecting rods 16, an L-shaped frame 17, and a connecting spring 18. One end of each connecting rod 16 is hinged to the frame 15, and the other end of each connecting rod 16 is hinged to the L-shaped frame 17. The top of the connecting spring 18 is fixedly connected to the frame 15, and the bottom of the connecting spring 18 is fixedly connected to the L-shaped frame 17. Furthermore, the output end of the lifting drive 5 is fixedly connected to the top of the frame 15. The four hinge points at the hinge points of the two connecting rods 16 with the frame 15 and the L-shaped frame 17 form a parallelogram. The top center of the beam frame 9 is hinged to the L-shaped frame 17, and the mounting crossbeam 10 is installed at the bottom of the beam frame 9.

[0069] In other embodiments, the elastic oscillator can be a spring alone, or other equivalent components with a certain elastic support effect.

[0070] The use of an elastic vibration element and vibration track 13 enables the connecting rod to vibrate up and down in the treatment fluid, thereby allowing the treatment fluid to come into fuller contact with the toothed mating surface and making the treatment fluid more uniform, thus enabling more thorough surface treatment of the toothed mating surface and various parts of the connecting rod.

[0071] When the linkage vibration is required during the processing, the drive cylinder 22 drives the rotating frame 21 to rotate 90 degrees around the hinge point at the mounting base 20, so that the vibration starting track 13 located above the guide track 6 is moved away, and the mounting crossbeam 10 can fall onto the guide track 6 to avoid the vibration starting track 13 interfering with the lifting and moving of the beam frame 9.

[0072] The lifting drive component 5 moves the beam frame 9 up to a position higher than the vibration track 13. The drive cylinder 22 moves the vibration track 13 back to a horizontal position. The lifting drive component 5 moves the beam frame 9 down until the installation crossbeam 10 falls onto the vibration track 13. The connecting rod is located above the electrolyte surface in the treatment tank 2. The trolley 4 moves the beam frame 9 back and forth on the hanging rail 3, causing the installation crossbeam 10 to frequently contact and disengage from the conical protrusion 14 on the vibration track 13. Under the action of the elastic connector, the beam frame 9 and the connecting rod vibrate up and down, which can perform more thorough surface treatment on the toothed mating surface and various parts of the connecting rod.

[0073] During the upward movement of beam frame 9, L-shaped frame 17 also moves up and down synchronously. The two connecting rods 16 restrict the vertical movement of L-shaped frame 17, and under the action of connecting spring 18, the vibration effect of beam frame 9 and connecting rod is further improved. During the upward and downward movement of beam frame 9, it swings around the hinge point of L-shaped frame 17, causing the connecting rod to vibrate up, down, left, and right with beam frame 9, thereby further improving the surface treatment effect of the connecting rod.

[0074] Example 2

[0075] For details, please refer to Figures 6-7 and Figure 9 In this embodiment, the suspension mechanism also includes a second hanger 23 and a pusher installed on the inner wall of the processing tank 2. The mounting frame 10 is provided with two mounting rods 19 arranged side by side. The first hanger 11 is fixedly connected to one of the mounting rods 19, and the second hanger 23 is fixedly connected to the other mounting rod 19. The first hanger 11 and the second hanger 23 are arranged correspondingly. The second hanger 23 is provided with a second hanger 24 arranged parallel to the first hanger 12 and located below the first hanger 12. The second hanger 24 is inserted into a through hole 30 at the lower part of the connecting rod. The outer diameter of the second hanger 24 is smaller than the inner diameter of the corresponding through hole 30. The pusher is used to push the connecting rod on the first hanger 12 to the second hanger 24.

[0076] When the connecting rod is suspended at the first rod 12, the central axis of the second rod 24 coincides with the central axis of the corresponding through hole 30 on the connecting rod. The outer diameter of the first rod 12 and the second rod 24 can be 1 / 3 to 1 / 2 of the inner diameter of the corresponding through hole 30, so that the treatment fluid can fully contact the corresponding through hole 30 at the second rod 24, while ensuring the smooth movement of the connecting rod at the first rod 12 or the second rod 24.

[0077] The first hanger 11 and the first hanger rod 12 are integrally connected to the corresponding mounting rod 19, and the second hanger 23 and the second hanger rod 24 are integrally connected to the corresponding mounting rod 19. All three hangers—first hanger 11, second hanger 23, first hanger rod 12, and second hanger rod 24—are made of conductive copper. The end of the second hanger rod 24 is provided with an upward-facing blocking vertical rod 28, the length of which is less than the inner diameter of the through hole 30. The blocking vertical rod 28 prevents the connecting rod from detaching from the second hanger rod 24, and ensures that the blocking vertical rod 28 can smoothly move out of the corresponding through hole 30 when the processed connecting rod is unloaded.

[0078] For details, please refer to Figure 1 , Figure 4 and Figure 6 The pusher includes multiple liquid distribution pipes 25 installed on the lower part of the inner wall of one side of the treatment tank 2 and a circulation pump 26 installed on the frame 1. The output end of the circulation pump 26 extends into the treatment tank 2 and is connected to the input end of the multiple liquid distribution pipes 25. Each output end of the multiple liquid distribution pipes 25 is equipped with a right-angle nozzle 27, with the output end of the right-angle nozzle 27 facing the corresponding connecting rod side. Furthermore, the multiple right-angle nozzles 27 are arranged correspondingly to the connecting rods on the multiple first hangers 11. The input end of the circulation pump 26 extends into the bottom of the treatment tank 2 on the side away from the liquid distribution pipes 25.

[0079] In other embodiments, the pusher can be a pusher plate and a telescopic cylinder. The pusher plate is installed at the output end of the telescopic cylinder. By activating the telescopic cylinder, the pusher plate pushes the corresponding connecting rod from the first lifting rod 12 to the second lifting rod 24.

[0080] In this embodiment, the conveying device for surface treatment of diesel engine connecting rods initially suspends the connecting rod at the first hanger 12 on the first hanger 11. The contact point between the first hanger 12 and the corresponding through hole 30 on the connecting rod is difficult to contact with the treatment fluid, resulting in incomplete treatment at the corresponding through hole 30 and leaving dead zones. When surface treatment is performed on a section of the connecting rod suspended at the first hanger 12 on the first hanger 11, only the toothed mating surface of the rod body 7 and the rod cap 8, as well as the corresponding through hole 30, can be immersed in the treatment fluid for further treatment. After completion, the trolley 4 moves along the suspension rail 3, causing the connecting rod to move to the corresponding right-angle nozzle 27. After the circulation pump 26 starts, it pressurizes the treatment fluid and sprays it out through the right-angle nozzle 27. The sprayed pressurized treatment fluid acts on the corresponding connecting rod and forms a thrust on the connecting rod along the axis of the first suspension rod 12. Under the action of the thrust, the connecting rod moves along the central axis of the first suspension rod 12 until it disengages from the first suspension rod 12. At this time, the second suspension rod 24 is always inserted into a through hole 30 at the bottom of the connecting rod. Under the action of gravity, the connecting rod moves from... Figure 6 After rotating 180 degrees as shown, it falls naturally, allowing the treatment fluid to enter the through hole 30 at the top of the original connecting rod, ensuring that the treatment fluid is in full contact with the inner walls of the two through holes 30 and avoiding dead corners.

[0081] The circulating pump 26 can pressurize the treatment liquid at the bottom of one side of the treatment tank 2 and spray it out through the liquid distribution pipe 25 and right-angle nozzle 27 on the other side of the treatment tank 2, so that the treatment liquid in the treatment tank 2 is in a state of circulation, thereby improving the mixing uniformity of the treatment liquid and providing further assurance for the concentration and temperature uniformity of the treatment liquid in the treatment tank 2.

[0082] When the pusher is a cylinder or screw structure, it can be fixed on the suspension mechanism or on the inner wall of the processing tank 2.

[0083] Based on the above embodiments 1 and 2, this embodiment also provides a device for deburring the toothed mating surface of a diesel engine connecting rod, including the above-mentioned conveying device for surface treatment of the diesel engine connecting rod, the vibrating track 13 is connected to the positive terminal of an external power supply, the treatment tank 2 is connected to the negative terminal of an external power supply, the rod body 7 and the rod cover 8 are connected by bolts 31, the upper part of the rod body 7 has an integrally formed through hole 30, a through hole 30 is formed between the rod body 7 and the rod cover 8, and in order to allow the electrolyte to contact the toothed mating surface, the rod body 7 and the rod cover 8 are not completely connected, but the toothed mating surfaces on the rod body 7 and the rod cover 8 are spaced at least 2 cm apart, so as to ensure that the electrolyte can completely electrolytically polish the toothed mating surface.

[0084] In the device for deburring the toothed joint surface of the diesel engine connecting rod, the elastic vibration element can be a spring alone, or other equivalent elements with a certain elastic support effect can be used, or the elastic connecting elements on both sides of the bottom of the frame 15 mentioned above can be used. The elastic connecting element includes the structure of two vertically arranged connecting rods 16, an L-shaped frame 17 and a connecting spring 18.

[0085] Similarly, the suspension mechanism can adopt an existing conventional suspension structure, or it can adopt the structure of the beam frame 9, the first suspension assembly, and the second suspension assembly described above. The push-pull component between the first suspension assembly and the second suspension assembly can adopt a cylinder or lead screw structure, or it can adopt the structure of the liquid distribution pipe 25 and the circulation pump 26 described above.

[0086] Electrolytic polishing uses the workpiece as the anode and the electrolyte connected to the cathode. Direct current is applied to selectively dissolve the anolyte, removing burrs and increasing surface gloss. Previously, connecting rod polishing was done using polishing tools, such as the engine connecting rod deburring device and method disclosed in CN119501732A. In this method, toothed blades are positioned corresponding to the connecting rod's tooth surfaces, and both ceramic fiber brushes and silicon carbide abrasive brushes are connected to rotating drive components. These brushes are mounted on a robot's movable arm, allowing automatic tooth surface polishing after the connecting rod is fixed in place, replacing manual deburring. However, the irregular surface of the connecting rod, especially the integrally formed through hole 30 and the toothed mating surface, makes mechanical polishing tools inconvenient, resulting in unsatisfactory physical polishing effects. Electrolytic polishing, on the other hand, can significantly improve the polishing effect and efficiency of connecting rods.

[0087] The mounting frame 10, first hanger 11, second hanger 23, first hanger 12, and second hanger 24 are all made of conductive copper. An electric heater 29 is installed at the bottom of the processing tank 2. The electric heater 29 can heat the processing liquid in the processing tank 2 to increase the temperature of the processing liquid. The increased temperature can increase the electrochemical reaction rate, reduce the viscosity of the processing liquid, improve the fluidity of the processing liquid, make it easier to form a uniform liquid film on the surface of the connecting rod, reduce bubbles, accelerate the diffusion of reactants from the surface of the connecting rod into the solution, and improve the conductivity of the processing liquid, thereby improving the efficiency and effect of electrolytic polishing of the connecting rod.

[0088] The upper end of bolt 31 is threaded to connect to rod body 7. The lower diameter of bolt 31 is smaller than the diameter of the connecting hole on rod cover 8, so that electrolyte can enter the connecting hole of rod cover 8 to further remove burrs in the connecting hole.

[0089] See Figure 10 A clamping mechanism for holding the connecting rod is provided on the first hanger 11. The clamping mechanism ensures that the connecting rod reliably contacts the first hanger 11, preventing intermittent power supply caused by poor contact between the connecting rod and the first hanger 11 during vibration, and ensuring continuous electrolytic polishing. Specifically, the clamping mechanism includes a clamping rod 32, a clamping spring 34, and a clamping release drive. The clamping rod 32 is rotatably mounted on the first hanger 11, and the clamping spring 34 is located between the first hanger 11 and the clamping rod 32. The clamping spring 34 presses one end of the clamping rod 32 against the connecting rod on the first hanger 12. One end of the clamping release drive is connected to the mounting crossbeam 10, and the other end corresponds to the other end of the clamping rod 32.

[0090] One end of the clamping rod 32 is provided with an arc-shaped clamping piece 33 for clamping the connecting rod, so as to make full contact with the upper end of the connecting rod and clamp it firmly and reliably.

[0091] The clamping release drive is a clamping release cylinder 35. One end of the clamping release cylinder 35 is fixedly connected to the mounting crossbeam 10, and the other end is located on the upper side of the other end of the clamping rod. After the clamping release cylinder 35 is activated, the piston rod of the cylinder pushes the clamping rod 32 to swing, thereby disengaging the clamping rod 32 from the connecting rod.

[0092] Before clamping the connecting rod, the clamping release cylinder 35 moves, causing the clamping rod 32 to swing against the resistance of the clamping spring 34. The arc-shaped clamping piece 33 disengages from the first lifting rod 12, and the through hole 30 at the upper end of the connecting rod is fitted onto the first lifting rod 12. Then the clamping release cylinder 35 retracts, and the clamping rod 32 swings under the action of the clamping spring 34, causing the arc-shaped clamping piece 33 to clamp the connecting rod on the first lifting rod 12.

[0093] In other embodiments, the clamping mechanism includes a clamping rod 32 and a clamping release drive. The clamping rod 32 is rotatably mounted on the first hanger 11. One end of the clamping release drive is rotatably connected to the mounting crossbeam 10, and the other end is rotatably connected to the clamping rod 32. The clamping rod 32 is directly driven to swing by the clamping release drive.

[0094] This embodiment also provides a process for deburring the toothed mating surface of a diesel engine connecting rod, including the following steps:

[0095] 1) The through hole 30 at the upper part of the connecting rod is suspended on the first hanger 12. The rod body and the rod cover 8 are connected by bolts 31, and the toothed mating surfaces on the rod body 7 and the rod cover 8 are spaced apart. The through hole 30 at the lower part of the connecting rod is sleeved on the outside of the second hanger 24, and the through hole 30 and the second hanger 24 are spaced apart.

[0096] 2) The lifting drive component 5 drives the beam frame 9 to move down until the installation cross frame 10 falls onto the vibration track 13. The toothed mating surfaces of the connecting rod body 7 and the rod cover 8 are immersed in the electrolyte in the treatment tank 2 to perform electrolytic polishing on the toothed mating surfaces and the inner wall of the through hole 30 at the bottom of the connecting rod.

[0097] 3) After the toothed mating surface and the inner wall of the through hole 30 at the bottom of the connecting rod are electrolytically polished, the pusher moves the connecting rod on the first hanger 12 to the second hanger 24, so that the connecting rod is separated from the first hanger 12 and the connecting rod is only suspended on the second hanger 24. The inner wall of the other through hole 30 of the connecting rod is immersed in the electrolyte of the treatment tank 2 and electrolytically polished.

[0098] When a clamping mechanism is installed on the suspension mechanism, the clamping mechanism must first be disengaged from the connecting rod before the pusher can be used to move the connecting rod on the first suspension rod 12 to the second suspension rod 24.

[0099] Preferably, in step 2), the trolley 4 slides back and forth on the hanging rail 3, and the mounting frame 10 and the vibration track 13 are always in contact. The connecting rod vibrates up and down while moving back and forth in the treatment tank 2. The trolley 4 slides back and forth from the hanging rail 3, further agitating the electrolyte, making the electrolyte more uniform. Moreover, each part of the connecting rod immersed in the electrolyte experiences a similar current density and time, thereby obtaining a more uniform dissolution rate and surface smoothness.

[0100] In other embodiments, steps 2) and 3) may also involve immersing the entire connecting rod completely in the electrolyte of the treatment tank 2.

[0101] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A conveying device for surface treatment of connecting rods in diesel engines, used for conveying connecting rods, the connecting rods comprising a rod body (7) and through holes (30) at both ends of the rod body (7); characterized in that, The conveying device includes a hanging rail (3), a frame (1), a trolley (4) and a suspension mechanism. The hanging rail (3) is set above the frame (1). The frame (1) has a processing groove (2) on its upper side. The trolley (4) is slidably installed on the hanging rail (3). The suspension mechanism is connected to the trolley (4) through a lifting drive component (5). The lifting drive component (5) is used to drive the suspension mechanism to move up and down. It also includes an elastic vibration starter and a vibration starter track (13) installed on both sides of the frame (1). The output end of the lifting drive (5) is elastically connected to the suspension mechanism through the elastic vibration starter. The vibration starter track (13) is provided with multiple evenly distributed conical protrusions (14). The suspension mechanism includes a beam frame (9), a first suspension assembly and a second suspension assembly. The beam frame (9) is connected to an elastic vibration starter. The first suspension assembly and the second suspension assembly are located on the lower side of the beam frame (9). The first suspension assembly and the second suspension assembly pass through two through holes (30) of the connecting rod, respectively. A pusher is also provided in the processing tank (2), which is used to push the connecting rod on the first suspension assembly to the second suspension assembly; The first suspension assembly includes a first hanger (11), on which a first hanger rod (12) is provided horizontally, and the first hanger rod (12) is inserted into a set of through holes (30) at the upper part of the rod body (7); The second suspension assembly includes a second hanger (23), on which a second hanger (24) is provided, which is arranged parallel to the first hanger (12) and located below the first hanger (12). The second hanger (24) is inserted into a through hole (30) at the lower part of the connecting rod, and the outer diameter of the second hanger (24) is smaller than the inner diameter of the corresponding through hole (30).

2. The conveying device for surface treatment of diesel engine connecting rods according to claim 1, characterized in that, The elastic vibration starter includes a frame (15) and elastic connectors installed on both sides of the bottom of the frame (15). The elastic connectors include two vertically arranged connecting rods (16), an L-shaped frame (17), and a connecting spring (18). One end of each connecting rod (16) is hinged to the frame (15), and the other end of each connecting rod (16) is hinged to the L-shaped frame (17). The top of the connecting spring (18) is fixedly connected to the frame (15), and the bottom of the connecting spring (18) is fixedly connected to the L-shaped frame (17).

3. The conveying device for surface treatment of diesel engine connecting rods according to claim 1, characterized in that, Guide rails (6) are also installed on both sides of the frame (1). The vibration starter rail (13) is located above the guide rails (6). The vibration starter rail (13) is connected to a clearance mechanism for rotating and shifting the vibration starter rail (13).

4. The conveying device for surface treatment of diesel engine connecting rods according to claim 3, characterized in that, The avoidance mechanism includes a mounting base (20) fixedly connected to the frame (1), a rotating frame (21) hingedly mounted on the mounting base (20), and a drive cylinder (22) that provides power for the rotation of the rotating frame (21). One end of the drive cylinder (22) is hinged to the mounting base (20), and the other end of the drive cylinder (22) is hinged to the rotating frame (21). The vibration track (13) is mounted on the top of the rotating frame (21).

5. The conveying device for surface treatment of diesel engine connecting rods according to claim 1, characterized in that, The top center of the beam frame (9) is hinged to the elastic vibration starter. The bottom of the beam frame (9) is provided with a mounting crossbeam (10). The mounting crossbeam (10) is provided with two mounting rods (19) arranged side by side. The first hanger (11) is fixedly connected to one of the mounting rods (19), and the second hanger (23) is fixedly connected to the other mounting rod (19).

6. The conveying device for surface treatment of diesel engine connecting rods according to claim 1, characterized in that, The pusher includes multiple liquid distribution pipes (25) installed on the lower part of the inner wall of one side of the treatment tank (2) and a circulation pump (26) installed on the frame (1). The output end of the circulation pump (26) extends into the treatment tank (2). The output end of the circulation pump (26) is connected to the input end of the multiple liquid distribution pipes (25). The output end of the multiple liquid distribution pipes (25) is equipped with a right-angle nozzle (27). The output end of the right-angle nozzle (27) faces the corresponding connecting rod side.

7. The conveying device for diesel engine connecting rod surface treatment according to claim 6, characterized in that, The input end of the circulating pump (26) extends into the bottom of the treatment tank (2) on the side away from the liquid distribution pipe (25).

8. The conveying device for surface treatment of diesel engine connecting rods according to claim 1, characterized in that, The end of the second rod (24) is provided with an upward-facing blocking rod (28), the length of which is less than the inner diameter of the through hole (30).

Images