Diesel engine crankshaft machining device

Abstract

The invention provides a diesel engine crankshaft machining device. The crankshaft grinding device comprises a base, two rotary driving boxes, a first moving frame, a second moving frame, a grinding mechanism and a crankshaft body. The two rotary driving boxes are both mounted above the base, mounting rods in the same horizontal direction as the two rotary driving boxes are fixedly arranged on the upper surfaces of the two rotary driving boxes, and a laser generator capable of horizontally sliding along the mounting rods is arranged outside the mounting rods; according to the scheme, in the belt wheel driving grinding process, the protruding plate is controlled to extrude the piston to generate gas to inject gas to the grinding wheel and the crankshaft body, the defects of scratches, galling and the like on the surface of a journal caused by extrusion and friction in the grinding process can be avoided, scrap iron can be blown away from a contact area in time through air injection clearing, hard points formed by accumulation of the scrap iron between grinding faces are avoided, and the service life of the crankshaft is prolonged. And the rotating polarization is detected in advance through laser, and it can be guaranteed that the lifting position of the three-jaw chuck can be intelligently adjusted through the adjusting motor.

Description

Technical Field

[0001] This invention relates to the field of crankshaft grinding technology, and more particularly to a diesel engine crankshaft processing device. Background Technology

[0002] The crankshaft of a diesel engine is one of the most important components of a diesel engine. The crankshaft converts the gas pressure transmitted from the connecting rod into torque, which is then transmitted to the transmission device to drive various accessories of the diesel engine and the power system of vehicles, ships, etc. Grinding the diesel engine crankshaft is a crucial process in its manufacturing and processing. The purpose is to optimize the surface quality, dimensional accuracy and performance through fine machining to meet its stringent working requirements.

[0003] After rough machining, burrs, tool scratches, or machining marks may remain on the surface of the crankshaft. These defects can lead to stress concentration and easily cause fatigue cracks under high-frequency alternating loads. Grinding can eliminate these defects, make the surface smooth and flat, and improve the surfaces of the crankshaft main journal, connecting rod journal, and other surfaces that mate with the bearings. Therefore, grinding is a crankshaft finishing step.

[0004] However, in the existing technology, during the grinding process between the surface to be ground and the grinding wheel, fine grinding mud-like iron filings are generated and accumulate in the contact gap between the surface to be ground and the grinding wheel. These filings are difficult to remove and easily form scratches, which will affect the surface accuracy and roughness of the crankshaft.

[0005] Therefore, it is necessary to provide a diesel engine crankshaft machining apparatus to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a diesel engine crankshaft processing device, which solves the technical problem in related technologies where mud-like iron filings accumulate at the contact gap between the grinding surface and the grinding wheel during grinding, affecting the grinding effect.

[0007] To solve the above-mentioned technical problems, the present invention provides a diesel engine crankshaft processing device, characterized in that it includes a base, two rotary drive boxes, a first movable frame, a second movable frame, a grinding mechanism, and a crankshaft body; Both rotary drive boxes are mounted on the base. The upper surface of the two rotary drive boxes is fixed with a mounting rod in the same horizontal direction as the two rotary drive boxes. A laser generator for detecting the polarization of the crankshaft body is provided on the outside of the mounting rod, which can slide horizontally along the mounting rod. The first movable frame is mounted above the base and located on one side of the crankshaft body. A second movable frame that can move back and forth is mounted on the movable part of the first movable frame. The grinding mechanism is located on the movable part of the second movable frame. The grinding mechanism includes a movable plate and a drive pulley, and a grinding drive box for controlling the rotation of the drive pulley is fixed on the upper surface of the movable plate; A positioning plate that follows the drive pulley and rotates is bolted to the outer wall of the drive pulley. An arc-shaped protrusion is fixed to the outer wall of the positioning plate. A side frame is fixed to the outer wall of the grinding drive box and below the drive pulley. A mounting cylinder that can generate compressed gas is fixedly installed through the side frame. A lifting key rod that can move vertically is slidable inside the mounting cylinder. A lifting wheel and a piston that follow the lifting key rod are fixed to the upper and lower ends of the lifting key rod, respectively. A connecting spring is sleeved on the outer wall of the lifting key rod. A first one-way valve and a second one-way valve are installed inside the mounting cylinder and below the piston, respectively. A jet hose for cleaning the outer circle of the crankshaft body is installed on the outer end of the first one-way valve.

[0008] Preferably, the upper and lower ends of the connecting spring are fixedly connected to the lifting wheel and the mounting cylinder, the outer wall of the piston is tightly fitted with the inner wall of the mounting cylinder, the top of the lifting wheel is fitted with the outer wall of the drive pulley, and the outlet end of the jet hose extends to one side of the grinding wheel. The grinding drive box is fixedly provided with a protective cover. Inside the protective cover, a grinding wheel responsible for grinding the crankshaft body is rotatably connected at the shaft center. A driven pulley is connected to the keyway at the shaft center of the grinding wheel. The outer walls of the drive pulley and the driven pulley are fitted with belts that connect the drive pulley and the driven pulley for transmission.

[0009] Preferably, it also includes two rotating mechanisms; The rotating mechanism includes a turntable, an adjusting seat, and an adjusting motor. The turntable is rotatably mounted on the outer wall of the rotary drive box and is driven to rotate synchronously with the adjusting seat. The adjusting seat is bolted to the outer wall of the turntable. The adjusting motor is installed inside the adjusting seat. The output shaft of the adjusting motor is keyway connected to a rotatable lead screw. The outer wall of the lead screw is threaded with a lifting plate that can move up and down under the influence of the lead screw's rotation. An adjustable three-jaw chuck is fixedly mounted on the outer wall of the lifting plate. The crankshaft body is located inside the three-jaw chuck. The upper and lower ends of the lead screw are rotatably connected to the adjusting seat through bearings.

[0010] Preferably, the laser generator is electrically connected to the processing module via a wire, the processing module is electrically connected to the PLC via a wire, and the PLC is electrically connected to the regulating motor via a wire.

[0011] Preferably, it also includes a positioning mechanism; An electric moving frame capable of driving the positioning mechanism to move horizontally is installed on the upper surface of the base and on one side of the crankshaft body. The positioning mechanism includes a mounting plate, a slide groove, a vertical plate, a fastening knob, and a cooling cylinder. The mounting plate is fixed above the moving part of the electric moving frame and its horizontal movement is controlled by the electric moving frame. The slide groove is located inside the mounting plate, and the vertical plate responsible for supporting the cooling cylinder is horizontally slidably installed inside the slide groove. The fastening knob is threaded to one side of the vertical plate. A retaining ring is fixed to the inner wall of the cooling cylinder. A sealing plate is installed on the outer wall of the retaining ring by bolts to isolate the internal space of the cooling cylinder. A tapered groove is opened inside the sealing plate. A horizontally sliding trigger rod is set at the axis of the cooling cylinder. A baffle is fixed inside the cooling cylinder and on the outer wall of the trigger rod. A sealing pin adapted to the groove is fixed at one end of the trigger rod and inside the groove. A return spring is sleeved on the outer wall of the trigger rod and on one side of the baffle. A guide wheel is installed at the outer end of the trigger rod. A positioning block is fixed on the outer wall of the guide wheel. A cooling hose is sealed and installed on the outer wall of the cooling cylinder. A sealing flange is sealed and installed at the outer end of the cooling cylinder. A cooling main pipe is installed at the axis of the sealing flange. Spring cylinders are fixed inside the vertical plate and at the upper and lower ends of the cooling cylinder. A positioning wheel that can position the crankshaft body to rotate under force is installed at the outer end of the spring cylinder.

[0012] Preferably, the cooling hose passes through the interior of the positioning block and extends to one side of the guide wheel. When the return spring is initially extended, the control baffle creates a gap between the outer wall of the sealing pin and the inner wall of the slot, allowing the coolant in the cooling main pipe to pass through.

[0013] Preferably, a sliding plate is integrally provided inside the slide groove and below the upright plate. Two movable stabilizing plates are slidably connected above the sliding plate. Limiting springs are fixed on opposite sides of the two stabilizing plates. A fixing frame is fixed on the side wall of the mounting plate. A sleeve is fixed inside the fixing frame. A pointed cone and a spring rod are slidably connected inside the sleeve. When the pointed cone is subjected to force, it pushes the two stabilizing plates, which can be controlled to move adaptively along the pointed cone. A moving rod is fixed to the side wall of the movable plate in the same horizontal direction as the spring rod.

[0014] Preferably, the slide plate and the two stabilizing plates are slidably connected to the groove, and the two stabilizing plates have a triangular cross-section.

[0015] Compared with related technologies, the diesel engine crankshaft machining apparatus provided by the present invention has the following beneficial effects: During the grinding process driven by the pulley, the rotation of the convex plate can be controlled to squeeze the piston and generate jet gas to spray gas onto the rotating grinding wheel and crankshaft body. This avoids the grinding process from being squeezed and rubbed, which can cause defects such as scratches and roughening on the journal surface. The air jet removal can promptly blow iron filings away from the contact area, avoiding the accumulation of iron filings between the grinding surfaces to form "hard spots". It also avoids uneven actual contact pressure between the grinding tool and the workpiece, which can eliminate over-grinding or dimensional deviations (such as roundness and cylindricity exceeding tolerances), ensuring better grinding accuracy. The air jet removal can also promptly clean iron filings from the tool surface, maintain its grinding performance, and reduce unnecessary wear. Meanwhile, when grinding the eccentric shaft surface, laser is used to pre-detect the rotational polarization, which can ensure that the adjusting motor can intelligently adjust the lifting position of the three-jaw chuck, thereby achieving precise adjustment of the crankshaft body rotation position. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the optimal structure for the present invention; Figure 2 This is a side view structural diagram provided by the present invention; Figure 3 for Figure 2 The diagram shows the structure of the grinding mechanism. Figure 4 for Figure 3 The enlarged structural diagram at point B is shown below; Figure 5 for Figure 3 The enlarged structural diagram at point C is shown below; Figure 6 for Figure 5 The diagram shows a cross-sectional view of the mounting cylinder. Figure 7 for Figure 1 The schematic diagram of the rotating mechanism shown is shown below; Figure 8 A schematic diagram of the laser generator's process for measuring the polarization of the crankshaft body, provided by this invention; Figure 9 for Figure 1 The diagram shows the structure of the positioning mechanism. Figure 10 for Figure 9 The diagram shows a sectional view of the vertical plate structure. Figure 11 for Figure 10 The enlarged structural diagram at point A is shown below; Figure 12 for Figure 11 The diagram shows a cross-sectional view of the sealing plate and cooling cylinder. Figure 13 for Figure 9 The diagram shows a cross-sectional view of the slide.

[0018] Explanation of icon numbers: 1. Base; 2. Rotary drive box; 3. Rotating mechanism; 31. Turntable; 32. Adjusting seat; 33. Adjusting motor; 34. Lead screw; 35. Lifting plate; 36. Three-jaw chuck. 4. Positioning mechanism; 41. Mounting plate; 42. Vertical plate; 43. Positioning wheel; 44. Cooling cylinder; 45. Trigger key; 46. Guide wheel; 47. Positioning block; 48. Baffle; 49. Sealing flange; 410. Cooling main pipe; 411. Cooling hose; 412. Snap ring; 413. Sealing plate; 414. Groove; 415. Sealing pin; 416. Return spring; 417. Knob; 418. Slide groove; 419. Slide plate; 420. Stabilizing plate; 421. Limit spring; 422. Fixing bracket; 423. Sleeve; 424. Cone; 425. Spring rod; 426. Spring cylinder. 5. Electric mobile frame; 6. First movable frame; 7. Grinding mechanism; 71. Moving plate; 72. Grinding drive box; 73. Drive pulley; 74. Protective cover; 75. Grinding wheel; 76. Driven pulley; 77. Belt; 78. Positioning plate; 79. Protruding plate; 710. Side frame; 711. Mounting cylinder; 712. Lifting key rod; 713. Piston; 714. Lifting wheel; 715. Connecting spring; 716. First check valve; 717. Second check valve; 718. Air jet hose; 8. Mounting rod, 9. Laser generator, 10. Crankshaft body, 11. Second moving frame, 12. Moving rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a diesel engine crankshaft machining apparatus.

[0021] First embodiment: Please combine Figures 1 to 8 A diesel engine crankshaft processing device includes a base 1, two rotary drive boxes 2, a first movable frame 6, a second movable frame 11, a grinding mechanism 7, and a crankshaft body 10. Both of the rotary drive boxes 2 are mounted on the base 1. The upper surface of the two rotary drive boxes 2 is fixed with a mounting rod 8 in the same horizontal direction as the two rotary drive boxes 2. A laser generator 9 is provided on the outside of the mounting rod 8, which can slide horizontally along the mounting rod 8 to detect the polarization of the crankshaft body 10. The first movable frame 6 is mounted above the base 1 and located on one side of the crankshaft body 10. A second movable frame 11 that can move back and forth is mounted on the movable part of the first movable frame 6. The grinding mechanism 7 is located on the movable part of the second movable frame 11. The grinding mechanism 7 includes a movable plate 7 and a drive pulley 73. A grinding drive box 72 for controlling the rotation of the drive pulley 73 is fixed on the upper surface of the movable plate 71. Preferably, the first moving frame 6 and the second moving frame 11 can be electric lead screw guide rails. The first moving frame 6 is mainly used to control the left and right movement of the second moving frame 11, while the second moving frame 11 is mainly used to control the back and forth movement of the entire grinding mechanism 7. Therefore, this design can control the grinding mechanism 7 to change its working position, and at the same time, it can be close to the surface to be ground for grinding.

[0022] Please see Figure 3 The grinding drive box 72 has a built-in electric motor, which is mainly used to drive and control the rotation of the drive pulley 73. Since the diameters of the drive pulley 73 and the driven pulley 76 are different, a speed difference can be formed. When the drive pulley 73 rotates, the driven pulley 76 is driven by the belt 77 to control the grinding wheel 75 to rotate within the cover 74, thereby controlling the grinding wheel 75 to rotate at high speed.

[0023] A positioning plate 78, which follows the drive pulley 73, is bolted to the outer wall of the drive pulley 73 and rotates accordingly. An arc-shaped protrusion 79 is fixed to the outer wall of the positioning plate 78. A side frame 710 is fixed to the outer wall of the grinding drive box 72 and below the drive pulley 73. A mounting cylinder 711 that can generate compressed gas is fixedly installed through the side frame 710. A lifting key rod 712 that can move vertically is slidably inside the mounting cylinder 711. A lifting wheel 714 and a piston 713 that follow the lifting key rod 712 are fixed to the upper and lower ends of the lifting key rod 712, respectively. A connecting spring 715 is sleeved on the outer wall of the lifting key rod 712. A first one-way valve 716 and a second one-way valve 717 are installed inside the mounting cylinder 711 and below the piston 713, respectively. A jet hose 718 for cleaning the outer circle of the crankshaft body 10 is installed on the outer end of the first one-way valve 716.

[0024] Please see Figures 3 to 5 During the rotation of the drive pulley 73, the drive pulley 73 will simultaneously drive the positioning plate 78 and the convex plate 79 to rotate synchronously. Please see Figure 5 and Figure 6Furthermore, when the convex plate 79 rotates to the position of the lifting wheel 714, the arc-shaped convex plate 79 will rotate and be forced to control the lifting wheel 714 to move downward. During the process of the lifting wheel 714 descending, it simultaneously drives the lifting key rod 712 to control the piston 713 to move downward and compress inside the mounting cylinder 711, thereby expelling the gas inside the mounting cylinder 711 through the first one-way valve 716 and the jet hose 718 to complete the jetting operation.

[0025] The upper and lower ends of the connecting spring 715 are fixedly connected to the lifting wheel 714 and the mounting cylinder 711. The outer wall of the piston 713 is tightly fitted with the inner wall of the mounting cylinder 711. The top of the lifting wheel 714 is fitted with the outer wall of the drive pulley 73. The outlet end of the jet hose 718 extends to one side of the grinding wheel 75. The grinding drive box 72 is fixedly provided with a protective cover 74. Inside the protective cover 74, a grinding wheel 75 is rotatably connected at the shaft center, which is responsible for grinding the crankshaft body 10. A driven pulley 76 is connected to the shaft center of the grinding wheel 75 via a keyway. The outer walls of the drive pulley 73 and the driven pulley 76 are fitted with a belt 77 that connects the drive pulley 73 and the driven pulley 76 for transmission.

[0026] It also includes two rotating mechanisms 3; The rotating mechanism 3 includes a turntable 31, an adjusting seat 32, and an adjusting motor 33. The turntable 31 is rotatably mounted on the outer wall of the rotating drive box 2 and is driven by the rotating drive box 2 to rotate synchronously with the adjusting seat 32. The adjusting seat 32 is bolted to the outer wall of the turntable 31. The adjusting motor 33 is installed inside the adjusting seat 32. The output shaft of the adjusting motor 33 is keyway connected to a rotatable lead screw 34. The outer wall of the lead screw 34 is threaded with a lifting plate 35 that can move up and down under the influence of the rotation of the lead screw 34. An adjustable three-jaw chuck 36 is fixedly mounted on the outer wall of the lifting plate 35. The crankshaft body 10 is located inside the three-jaw chuck 36. The upper and lower ends of the lead screw 34 are rotatably connected to the adjusting seat 32 through bearings.

[0027] Please see Figure 7 By positioning both ends of the crankshaft body 10 within the three-jaw chuck 36 and locking the three-jaw chuck 36, the crankshaft body 10 can be clamped. However, the eccentric connecting rod surface of the crankshaft body 10 is also ground. If it is in the initial clamping state, the eccentric surface of the crankshaft body 10 will generate eccentric vibration when the turntable 31 rotates, and it cannot be ground. Therefore, the user can start the adjustment motor 33 to control the rotation of the lead screw 34. When the lead screw 34 rotates, it can control the lifting plate 35 to move up and down. The distance of the lifting and lowering is the vertical value from the center of the eccentric shaft surface to the center of the main shaft surface. After the adjustment is completed, the eccentric shaft surface of the crankshaft body 10 will not vibrate eccentrically when the turntable 31 rotates.

[0028] The laser generator 9 is electrically connected to the processing module via a wire, the processing module is electrically connected to the PLC via a wire, and the PLC is electrically connected to the regulating motor 33 via a wire.

[0029] Please see Figure 2 and Figure 8 The axis of the laser generator 9 and the axis of the turntable 31 are on the same vertical line. Therefore, the laser emitted by the laser generator 9 towards the bottom can be projected onto the surface of the crankshaft body 10 to be polished. When the crankshaft body 10 is rotated, the user can move the laser generator 9 to the eccentric shaft surface, and the laser can be projected onto the eccentric shaft surface. If polarization occurs when the rotary drive box 2 is started to control the rotation of the turntable 31, the polarization amplitude can be calculated by the processing module. Finally, the PLC can control the adjustment motors 33 on the two turntables 31 to precisely adjust the displacement distance of the crankshaft body, thereby effectively eliminating the polarization effect. Understandably: a high-precision servo motor can be selected for adjusting motor 33. Example

[0030] During the grinding process, the drive pulley 73 can control the rotation of the convex plate 79 to squeeze the piston 713 and generate jet gas to spray gas onto the rotating grinding wheel 75 and crankshaft body 10. This can avoid the grinding process from being squeezed and rubbed, which can cause defects such as scratches and roughening on the journal surface. The air jet cleaning can blow iron filings away from the contact area in time, avoiding the accumulation of iron filings between the grinding surfaces to form "hard spots". It can also avoid uneven actual contact pressure between the grinding tool and the workpiece, eliminate over-grinding or dimensional deviations (such as roundness and cylindricity exceeding tolerance), and ensure better grinding accuracy. The air jet cleaning can also clean iron filings on the tool surface in time, maintain its grinding performance, and reduce unnecessary wear. Meanwhile, when grinding the eccentric shaft surface, laser is used to pre-detect the rotational polarization, which can ensure that the adjusting motor 33 can intelligently adjust the lifting position of the three-jaw chuck 36, thereby achieving precise adjustment of the crankshaft body 10 rotation position.

[0031] Second embodiment: Please see Figures 9 to 12 It also includes positioning mechanism 4; An electric moving frame 5, which can drive the positioning mechanism 4 to move horizontally, is installed on the upper surface of the base 1 and on one side of the crankshaft body 10. The positioning mechanism 4 includes a mounting plate 41, a slide groove 418, a vertical plate 42, a fastening knob 417, and a cooling cylinder 44. The mounting plate 41 is fixed above the moving part of the electric moving frame 5 and its horizontal movement is controlled by the electric moving frame 5. The slide groove 418 is located inside the mounting plate 41. The vertical plate 42, which is responsible for supporting the cooling cylinder 44, is horizontally slidably installed inside the slide groove 418. The fastening knob 417 is threaded to one side of the vertical plate 42. A retaining ring 412 is fixedly installed on the inner wall of the cooling cylinder 44. A sealing plate 413 is installed on the outer wall of the retaining ring 412 by bolts to isolate the internal space of the cooling cylinder 44. A conical groove 414 is opened inside the sealing plate 413. A horizontally sliding trigger rod 45 is provided at the axis of the cooling cylinder 44. A baffle 48 is fixedly installed inside the cooling cylinder 44 and on the outer wall of the trigger rod 45. A sealing pin 415 adapted to the groove 414 is fixedly installed at one end of the trigger rod 45 and inside the groove 414. A return spring 416 is sleeved on the outer wall of the trigger rod 45 and on one side of the baffle 48. A guide wheel 46 is installed at the outer end of the trigger rod 45. A positioning block 47 is fixed on the outer wall of the guide wheel 46. A cooling hose 411 is sealed and installed on the outer wall of the cooling cylinder 44. A sealing flange 49 is sealed and installed at the outer end of the cooling cylinder 44. A cooling main pipe 410 is installed at the axis of the sealing flange 49. Spring cylinders 426 are fixed inside the vertical plate 42 and at the upper and lower ends of the cooling cylinder 44. A positioning wheel 43 is installed at the outer end of the spring cylinder 426 to position the crankshaft body 10 under rotational force.

[0032] Please see Figure 9 The electric moving frame 5 can be an electric lead screw guide rail, which is mainly used to control the position of the positioning mechanism 4 and ensure that the positioning mechanism 4 can perform positioning processing on each grinding surface.

[0033] Please see Figure 11 and Figure 12 In the initial state, the return spring 416 is in its initial state, there is a gap between the sealing pin 415 and the slot 414, and the cooling main pipe 410 and the cooling hose 411 are in a connected state. Please see Figures 10 to 12 Before grinding, the user needs to push the vertical plate 42 to bring the two positioning wheels 43 close to the grinding surface. After they are close, the user needs to push them with force. When the sealing pin 415 is fully inserted into the groove 414 to seal it, the return spring 416 is in a compressed state and the sealing plate 413 completely forms a seal. The coolant in the cooling main pipe 410 cannot enter the cooling hose 411. As the grinding process begins, the outer diameter of the crankshaft body 10 will become smaller and smaller. At this time, the guide wheel 46 will control the sealing pin 415 to return to its initial state through the trigger key 45. During the reset process, the slot 414 will open, and the coolant inside the cooling manifold 410 will enter the cooling hose 411 through the sealing plate 413 and be sprayed onto the crankshaft body 10 through the cooling hose 411.

[0034] The cooling hose 411 passes through the interior of the positioning block 47 and extends to one side of the guide wheel 46. When the return spring 416 is initially extended, the control baffle 48 creates a gap between the outer wall of the sealing pin 415 and the inner wall of the slot 414, allowing the coolant in the cooling main pipe 410 to pass through.

[0035] In this embodiment, compared to the traditional design, the crankshaft body 10 is positioned on the shaft surface by the positioning wheels 43 set at the top and bottom before grinding. Therefore, this design can effectively protect the crankshaft body 10, ensuring greater stability during rotation grinding. In addition, if rotational deviation occurs, the positioning wheels 43 can also provide protection to avoid danger. Simultaneously, as the positioning wheel 43 approaches the positioning point, the guide wheel 46 will simultaneously come into contact with the crankshaft body 10. Before grinding, the sealing pin 415 and the groove 414 are in a blocked state. As grinding continues, the size of the grinding surface of the crankshaft body 10 will become smaller and smaller. Therefore, the sealing pin 415 can be controlled to switch from the blocked state to the open state, so that the sprayed coolant can cool the grinding surface of the crankshaft body 10 and the grinding wheel 75. Secondly, the degree of separation between the sealing pin 415 and the groove 414 depends on the size of the grinding surface of the crankshaft body 10. As the grinding amount increases, the flow rate of the coolant also increases automatically, so it can effectively cool down.

[0036] Third embodiment: Please see Figure 3 and Figure 12 Inside the slide groove 418 and below the upright plate 42, a slide plate 419 is integrally formed with the upright plate 42. Two movable stabilizing plates 420 are slidably connected above the slide plate 419. A limiting spring 421 is fixed on one side of the two stabilizing plates 420. A fixing frame 422 is fixed on the side wall of the mounting plate 41. A sleeve 423 is fixed inside the fixing frame 422. A pointed cone 424 and a spring rod 425 are slidably connected inside the sleeve 423. When the pointed cone 424 is subjected to force, it pushes the two stabilizing plates 420, which can be controlled to move adaptively along the pointed cone 424.

[0037] The movable plate 71 has a movable rod 12 fixed on its side wall and in the same horizontal direction as the spring rod 425.

[0038] The slide plate 419 and the two stabilizing plates 420 are slidably connected to the slide groove 418, and the cross-section of the two stabilizing plates 420 is triangular.

[0039] Please see Figure 3 and Figure 12During the operation of the first and second embodiments, when polishing, it is necessary to control the moving plate 71 to move forward and drive the grinding wheel 75 to contact the crankshaft body 10 for polishing. When the moving plate 71 moves, it will simultaneously drive the moving rod 12 to move forward. During the movement, the moving rod 12 will be pushed by the spring rod 425 to control the front end of the cone 424 to be pushed by the two stabilizing plates 420. The two stabilizing plates 420 will extend to both sides inside the slide groove 418. During the extension, the outer wall of the stabilizing plate 420 will be stabilized by the force on the inner wall of the slide groove 418, thereby repositioning the upright plate 42 inside the slide groove 418. Example

[0040] When the grinding wheel 75 approaches the surface of the crankshaft body 10, the moving rod 12 will control the spring rod 425 to control the cone 424 to extend the stabilizing plate 420. When the force-bearing grooves 418 on both sides of the stabilizing plate 420 are extended, it can ensure that the upright plate 42 is positioned and stabilized a second time on the basis of the positioning of the knob 417. The positioning force comes from the grinding movement of the grinding wheel 75. As the grinding amount is greater, the positioning force of the stabilizing plate 420 is greater. This design can stabilize the upright plate 42 a second time, ensuring that the upright plate 42 can be more stable and safe in the grinding state.

[0041] Please refer to the following: Figures 1 to 13 The working principle of the diesel engine crankshaft machining device provided by the present invention is as follows: Step S1: Clamp the crankshaft body 1; Position both ends of the crankshaft body 10 in the three-jaw chuck 36 and lock the three-jaw chuck 36 to clamp it. If the eccentric connecting rod surface of the crankshaft body 10 also needs to be polished, start the adjusting motor 33 to control the lead screw 34 to rotate. When the lead screw 34 rotates, it can control the lifting plate 35 to move up and down. The distance of lifting and down is the vertical value from the center of the eccentric shaft surface to the center of the main shaft surface. After the adjustment is completed, the eccentric shaft surface of the crankshaft body 10 can also be polished. Step S2: Positioning before polishing; Push the upright plate 42 to bring the two positioning wheels 43 close to the grinding surface, and after they are close, you need to push them with continuous force until the sealing pin 415 is completely inside the groove 414 to seal it. Step S3: Grinding of crankshaft body 10; The first moving frame 6 and the second moving frame 11 are started to bring the grinding mechanism 7 close to the crankshaft body 10. The grinding drive box 72 drives and controls the drive pulley 73 to rotate. Since the diameters of the drive pulley 73 and the driven pulley 76 are different, a speed difference can be formed. When the drive pulley 73 rotates, the driven pulley 76 is driven by the belt 77 to control the grinding wheel 75 to rotate within the cover 74. Thus, the grinding wheel 75 can be controlled to rotate at high speed to grind the crankshaft body 10. Step S4: When grinding is in progress, the outer diameter of the crankshaft body 10 will become smaller and smaller. At this time, the guide wheel 46 will control the sealing pin 415 to reset to the initial state through the trigger key rod 45. During the reset process, the slot 414 opens, and the coolant inside the cooling main pipe 410 will enter the cooling hose 411 through the sealing plate 413. The coolant will be sprayed onto the crankshaft body 10 through the cooling hose 411 to achieve cooling and temperature reduction.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A diesel engine crankshaft machining apparatus, characterized in that, It includes a base, two rotary drive boxes, a first movable frame, a second movable frame, a grinding mechanism, and a crankshaft body; Both rotary drive boxes are mounted on the base. The upper surface of the two rotary drive boxes is fixed with a mounting rod in the same horizontal direction as the two rotary drive boxes. A laser generator for detecting the polarization of the crankshaft body is provided on the outside of the mounting rod, which can slide horizontally along the mounting rod. The first movable frame is mounted above the base and located on one side of the crankshaft body. A second movable frame that can move back and forth is mounted on the movable part of the first movable frame. The grinding mechanism is located on the movable part of the second movable frame. The grinding mechanism includes a movable plate and a drive pulley, and a grinding drive box for controlling the rotation of the drive pulley is fixed on the upper surface of the movable plate; A positioning plate that follows the drive pulley and rotates is bolted to the outer wall of the drive pulley. An arc-shaped protrusion is fixed to the outer wall of the positioning plate. A side frame is fixed to the outer wall of the grinding drive box and below the drive pulley. A mounting cylinder that can generate compressed gas is fixedly installed through the side frame. A lifting key rod that can move vertically is slidable inside the mounting cylinder. A lifting wheel and a piston that follow the lifting key rod are fixed to the upper and lower ends of the lifting key rod, respectively. A connecting spring is sleeved on the outer wall of the lifting key rod. A first one-way valve and a second one-way valve are installed inside the mounting cylinder and below the piston, respectively. A jet hose for cleaning the outer circle of the crankshaft body is installed on the outer end of the first one-way valve.

2. The diesel engine crankshaft machining apparatus according to claim 1, characterized in that, The upper and lower ends of the connecting spring are fixedly connected to the lifting wheel and the mounting cylinder, the outer wall of the piston is tightly fitted with the inner wall of the mounting cylinder, the top of the lifting wheel is fitted with the outer wall of the drive pulley, and the outlet end of the jet hose extends to one side of the grinding wheel. The grinding drive box is fixedly provided with a protective cover. Inside the protective cover, a grinding wheel responsible for grinding the crankshaft body is rotatably connected at the shaft center. A driven pulley is connected to the keyway at the shaft center of the grinding wheel. The outer walls of the drive pulley and the driven pulley are fitted with belts that connect the drive pulley and the driven pulley for transmission.

3. The diesel engine crankshaft machining apparatus according to claim 1, characterized in that, It also includes two rotating mechanisms; The rotating mechanism includes a turntable, an adjusting seat, and an adjusting motor. The turntable is rotatably mounted on the outer wall of the rotary drive box and is driven to rotate synchronously with the adjusting seat. The adjusting seat is bolted to the outer wall of the turntable. The adjusting motor is installed inside the adjusting seat. The output shaft of the adjusting motor is keyway connected to a rotatable lead screw. The outer wall of the lead screw is threaded with a lifting plate that can move up and down under the influence of the lead screw's rotation. An adjustable three-jaw chuck is fixedly mounted on the outer wall of the lifting plate. The crankshaft body is located inside the three-jaw chuck. The upper and lower ends of the lead screw are rotatably connected to the adjusting seat through bearings.

4. The diesel engine crankshaft machining apparatus according to claim 1, characterized in that, The laser generator is electrically connected to the processing module via a wire, the processing module is electrically connected to the PLC via a wire, and the PLC is electrically connected to the regulating motor via a wire.

5. The diesel engine crankshaft machining apparatus according to claim 1, characterized in that, It also includes positioning mechanisms; An electric moving frame capable of driving the positioning mechanism to move horizontally is installed on the upper surface of the base and on one side of the crankshaft body. The positioning mechanism includes a mounting plate, a slide groove, a vertical plate, a fastening knob, and a cooling cylinder. The mounting plate is fixed above the moving part of the electric moving frame and its horizontal movement is controlled by the electric moving frame. The slide groove is located inside the mounting plate, and the vertical plate responsible for supporting the cooling cylinder is horizontally slidably installed inside the slide groove. The fastening knob is threaded to one side of the vertical plate. A retaining ring is fixed to the inner wall of the cooling cylinder. A sealing plate is installed on the outer wall of the retaining ring by bolts to isolate the internal space of the cooling cylinder. A tapered groove is opened inside the sealing plate. A horizontally sliding trigger rod is set at the axis of the cooling cylinder. A baffle is fixed inside the cooling cylinder and on the outer wall of the trigger rod. A sealing pin adapted to the groove is fixed at one end of the trigger rod and inside the groove. A return spring is sleeved on the outer wall of the trigger rod and on one side of the baffle. A guide wheel is installed at the outer end of the trigger rod. A positioning block is fixed on the outer wall of the guide wheel. A cooling hose is sealed and installed on the outer wall of the cooling cylinder. A sealing flange is sealed and installed at the outer end of the cooling cylinder. A cooling main pipe is installed at the axis of the sealing flange. Spring cylinders are fixed inside the vertical plate and at the upper and lower ends of the cooling cylinder. A positioning wheel that can position the crankshaft body to rotate under force is installed at the outer end of the spring cylinder.

6. The diesel engine crankshaft machining apparatus according to claim 5, characterized in that, The cooling hose passes through the interior of the positioning block and extends to one side of the guide wheel. When the return spring is initially extended, the control baffle creates a gap between the outer wall of the sealing pin and the inner wall of the slot, allowing the coolant in the cooling main pipe to pass through.

7. The diesel engine crankshaft machining apparatus according to claim 5, characterized in that, A sliding plate is integrally formed with the vertical plate inside the chute and below it. Two movable stabilizing plates are slidably connected above the sliding plate. Limiting springs are fixed on opposite sides of the two stabilizing plates. A fixing frame is fixed on the side wall of the mounting plate. A sleeve is fixed inside the fixing frame. A pointed cone and a spring rod are slidably connected inside the sleeve. When the pointed cone is subjected to force, it pushes the two stabilizing plates, which can be controlled to move adaptively along the pointed cone. A moving rod is fixed to the side wall of the movable plate in the same horizontal direction as the spring rod.

8. The diesel engine crankshaft machining apparatus according to claim 7, characterized in that, The slide plate and the two stabilizing plates are slidably connected to the slide groove, and the cross-section of the two stabilizing plates is triangular.

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