Automatic impact device for crankshaft throw difference measuring point

Abstract

The application discloses a kind of automatic point devices of crankshaft throw difference measuring point, including driving mechanism, a pair of slider mechanism and connecting rod mechanism;Driving mechanism includes base, cylinder seat, double-acting cylinder, screw sleeve, hand-operated reversing valve and two gas pipes;A pair of slider mechanism is symmetrically set in the inner opening two sides of corresponding two crank webs of file, located in the downside of driving mechanism, slider mechanism includes guide sleeve, slider, sample punch, wedge, adjusting screw and lock screw;Connecting rod mechanism is set in the inner opening middle part of corresponding two crank webs of file, connecting rod mechanism includes middle connecting rod and two side connecting rods located in the two sides of middle connecting rod, and the lower end of two side connecting rods is respectively hinged with the two sides of slider.This application not only has simple structure and low cost, but also automatically punches point throughout, saves time and effort in operation, is easy to use, has high work efficiency, can effectively guarantee the consistency of each file eye position, so as to ensure that crankshaft throw difference measuring error is small, and measurement result is accurate.

Description

Technical Field

[0001] This invention relates to the machining of crankshaft shift difference measuring points for marine diesel engines, and more particularly to an automatic punching device for crankshaft shift difference measuring points, belonging to the technical field of diesel engine crankshaft machining equipment. Background Technology

[0002] On the inner opening surfaces of the crank arms in each gear of the marine medium-speed engine crankshaft, punch holes are drilled to measure the gear shift difference and verify whether the crankshaft meets the design requirements. The punch holes are generally drilled at the intersection of the line connecting the main journal's elemental line and the inner opening surface of the crank arm, and the position of the punch holes for each gear should be consistent. Due to space constraints, in actual production, the fitter typically scribing lines and then manually punching the holes. However, due to the influence of factors such as the scribing needle, the center punch, and manual labor, the position of the punch holes for each gear often varies and cannot be kept consistent, resulting in a large error in the measured gear shift difference and inaccurate measurement results. Furthermore, manual drilling by the fitter is labor-intensive and inefficient. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic punching device for measuring crankshaft shift difference that is simple in structure, easy to use, highly efficient, and can effectively ensure that the punching positions of each gear are consistent.

[0004] This invention is achieved through the following technical solution:

[0005] An automatic timing device for measuring crankshaft gear shift difference includes a drive mechanism, a pair of slider mechanisms, and a connecting rod mechanism. The drive mechanism includes a base, a cylinder seat, a double-acting cylinder, a threaded sleeve, a manual directional valve, and two air pipes. The base is supported at both ends on the balance block mounting surfaces of the two crank arms corresponding to the gear shift. The cylinder seat is fixedly supported on the upper middle part of the base. The double-acting cylinder is fixedly supported on the cylinder seat. The threaded sleeve is disposed inside the cylinder seat and screwed onto the lower end of the piston rod of the double-acting cylinder. The manual directional valve is fixed to one end of the base. The two air pipes are respectively fixedly connected at their ends to the inlet and outlet ports of the manual directional valve and the inlet and outlet ports of the double-acting cylinder. The pair of slider mechanisms are symmetrically arranged on both sides of the inner opening of the two crank arms corresponding to the gear shift, located below the drive mechanism. The slider mechanisms include guide sleeves, sliding... The system comprises a block, a punch, a wedge, an adjusting screw, and a set screw. The upper side of the guide sleeve is fixedly connected to the lower side of the base. The slider is slidably supported in the inner hole of the guide sleeve. The punch is fixed in the horizontal inner hole of the slider by the set screw. The punch head corresponds to the punching point on the inner side of the crank arm. The wedge is fixed in the vertical inner hole of the slider. The inclined surface of the wedge rests on the inclined end face of the tail of the punch. The adjusting screw passes through the guide sleeve and the bottom of the slider and rests on the bottom of the wedge. The linkage mechanism is set in the middle of the inner opening of the two crank arms in the corresponding position. The linkage mechanism includes a central connecting rod and two side connecting rods located on both sides of the central connecting rod. The upper end of the central connecting rod passes through the base and is hinged to the lower end of the screw sleeve. The upper ends of the two side connecting rods are respectively hinged to the lower end of the central connecting rod. The lower ends of the two side connecting rods are respectively hinged to the two sides of the slider by side pins.

[0006] The objectives of this invention can also be further achieved through the following technical measures.

[0007] The aforementioned automatic punching device for measuring crankshaft shift difference includes a pair of slider mechanisms with spring mechanisms on both sides. The spring mechanisms include tension springs and two connecting screws. The inner ends of the two connecting screws pass through the two guide sleeves and are fixed on the corresponding side pins. The two ends of the tension springs are fixed on the outer ends of the two connecting screws.

[0008] The aforementioned automatic punching device for measuring crankshaft shift difference, wherein one side of each of the two guide sleeves is provided with a horizontal sliding groove, and the connecting screw is slidably connected to the horizontal sliding groove.

[0009] The aforementioned automatic punching device for measuring crankshaft shift difference, wherein the base is positioned at both ends by positioning pins.

[0010] The aforementioned automatic punching device for measuring crankshaft shift difference includes a guide sleeve with two mounting holes at the bottom corresponding to the positions of the set screw and the adjusting screw.

[0011] The aforementioned automatic punching device for measuring crankshaft shift difference is provided with a hand ring on the top of the reciprocating cylinder.

[0012] This invention allows for easy conversion of the reciprocating motion of the piston rod in a double-acting cylinder into a horizontal reciprocating motion of a slider via a linkage mechanism simply by rotating the handle of the manual reversing valve. This enables punching at various crank arm positions. The invention is not only simple in structure and low in cost, but also features fully automatic punching, saving time and effort, ease of use, and high efficiency. It effectively ensures the consistency of punching positions across different gears, thus minimizing crankshaft shift difference measurement errors and ensuring accurate results. The length of the punch in this invention is adjustable, allowing for punching at different depths. Furthermore, this invention is portable, not limited by work location, and has a wide range of applications.

[0013] The advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 yes Figure 1 The left view;

[0016] Figure 3 yes Figure 1 AA sectional view. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 and Figure 2 As shown, the present invention includes a drive mechanism 1, a pair of slider mechanisms 2, and a linkage mechanism 3. The drive mechanism 1 includes a base 11, a cylinder seat 12, a repeating cylinder 13, a threaded sleeve 14, a manual reversing valve 15, and two air pipes 16. The two ends of the base 11 are respectively supported on the balance block mounting surfaces of the two crank arms 4 of the corresponding gear, and are respectively positioned by round pins 17 and flat pins 18, that is, one side and two pins for positioning, which can realize quick installation and disassembly of the device. The cylinder seat 12 is fixedly supported on the upper middle part of the base 11 by fasteners. The repeating cylinder 13 is fixedly supported on the cylinder seat 12 by fasteners. The threaded sleeve 14 is set in the cylinder seat 12 and screwed onto the lower end of the piston rod of the repeating cylinder 13. The manual reversing valve 15 is fixed to the right end of the base 11 by fasteners. The two ends of the two air pipes 16 are respectively fixed to the inlet and exhaust ports of the manual reversing valve 15 and the inlet and exhaust ports of the repeating cylinder 13. The top of the double-acting cylinder 13 is equipped with a wristband 19 for easy carrying of the invention.

[0019] A pair of slider mechanisms 2 are symmetrically arranged on both sides of the inner opening of the two crank arms 4 in the corresponding positions, located on the lower side of the drive mechanism 1. The slider mechanism 2 includes a guide sleeve 21, a slider 22, a punch 23, a wedge 24, an adjusting screw 25, and a set screw 26. The upper side of the guide sleeve 21 is fixed to the lower side of the base 11 by fasteners. The slider 22 is supported in the inner hole of the guide sleeve 21 and can slide left and right along the inner hole of the guide sleeve 21. The punch 23 is fixed in the horizontal inner hole of the slider 22 by the set screw 26. The punch head of the punch 23 corresponds to the punching point on the inner side of the crank arm 4. The wedge 24 is fixed in the vertical inner hole of the slider 22. The inclined surface of the wedge 24 abuts against the inclined end face of the tail of the punch 23. The adjusting screw 25 passes through the bottom of the guide sleeve 21 and the slider 22 and abuts against the bottom of the wedge 24. When the punch 23 is worn after the first use or after multiple uses, the position of the punch 23 can be adjusted by the wedge block 24 to make the positions of the punches 23 on both sides symmetrical.

[0020] like Figure 3 As shown, a pair of slider mechanisms 2 are further provided with spring mechanisms 5 on both sides. Each spring mechanism 5 includes a tension spring 51 and two connecting screws 52. The inner ends of the two connecting screws 52 pass through one side of each of the two guide sleeves 21 and are screwed onto corresponding side pins. The two ends of the tension spring 51 are fixed to the outer ends of the two connecting screws 52. Each of the two guide sleeves 21 has a horizontal groove 211 on one side, allowing the connecting screws 52 to slide left and right along the horizontal groove 211. The bottom of each guide sleeve 21 has two mounting holes 212 corresponding to the positions of the set screw 26 and the adjusting screw 25, facilitating their installation. The main function of the spring mechanisms 5 is to help the slider mechanism 2 quickly reset and complete the punching and drilling process.

[0021] like Figure 3 As shown, the linkage mechanism 3 is located in the middle of the inner opening of the two crank arms 4 in the corresponding gear. It includes a central connecting rod 31 and a left connecting rod 32 and a right connecting rod 33 located on both sides of the central connecting rod 31. The upper end of the central connecting rod 31 passes through the base 11 and is hinged to the lower end of the threaded sleeve 14 through the upper pin 34. The upper ends of the left connecting rod 32 and the right connecting rod 33 are respectively hinged to the lower end of the central connecting rod 31 through the lower pin 35. The lower ends of the left connecting rod 32 and the right connecting rod 33 are respectively hinged to the two sides of the slider 22 through the side pins 36. Among them, the right connecting rod 33 is fork-shaped, and the left connecting rod 32 is composed of two connecting rods.

[0022] When the present invention automatically punches the mark, the handle of the manual reversing valve 15 is rotated, and the piston rod of the reciprocating cylinder 13 moves up and down reciprocally. The screw sleeve 14 drives the connecting rod mechanism 3 to move up and down reciprocally as well. Under the drive of the connecting rod mechanism 3, the slider mechanism 2 moves horizontally reciprocally in the guide sleeve 21, thereby realizing automatic punching.

[0023] In addition to the above embodiments, the present invention may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. An automatic timing device for measuring crankshaft gear shift difference, characterized in that: The system includes a drive mechanism, a pair of slider mechanisms, and a linkage mechanism. The drive mechanism comprises a base, a cylinder seat, a double-acting cylinder, a threaded sleeve, a manual directional valve, and two air pipes. The base is supported at both ends on the balance block mounting surfaces of the two crank arms in corresponding gears. The base is positioned at both ends by locating pins. The cylinder seat is fixedly supported on the upper middle part of the base. The double-acting cylinder is fixedly supported on the cylinder seat. The threaded sleeve is located inside the cylinder seat and screwed onto the lower end of the piston rod of the double-acting cylinder. The manual directional valve is fixed to one end of the base. The two air pipes are fixedly connected at both ends to the inlet and outlet ports of the manual directional valve and the inlet and outlet ports of the double-acting cylinder, respectively. The pair of slider mechanisms are symmetrically arranged on both sides of the inner opening of the two crank arms in corresponding gears, located below the drive mechanism. Each slider mechanism includes a guide sleeve, a slider, a punch, a wedge, an adjusting screw, and a set screw. The upper side of the guide sleeve is fixedly connected to the lower side of the base, and the slider is slidably supported within the inner hole of the guide sleeve. The punch is fixed in the horizontal inner hole of the slider by a set screw. The punch head corresponds to the punching point on the inner side of the crank arm. The wedge is fixed in the vertical inner hole of the slider. The inclined surface of the wedge rests on the inclined end face of the tail of the punch. The adjusting screw passes through the guide sleeve and the bottom of the slider and rests on the bottom of the wedge. A spring mechanism is provided on both sides of the pair of slider mechanisms. The spring mechanism includes a tension spring and two connecting screws. The inner ends of the two connecting screws pass through one side of the two guide sleeves and are fixed on the corresponding side pins. The two ends of the tension spring are fixed on the outer ends of the two connecting screws. The linkage mechanism is set in the middle of the inner opening of the two crank arms in the corresponding position. The linkage mechanism includes a central connecting rod and two side connecting rods located on both sides of the central connecting rod. The upper end of the central connecting rod passes through the base and is hinged to the lower end of the screw sleeve. The upper ends of the two side connecting rods are hinged to the lower end of the central connecting rod. The lower ends of the two side connecting rods are hinged to the two sides of the slider by side pins.

2. The automatic timing device for measuring crankshaft gear shift difference as described in claim 1, characterized in that: The two guide sleeves are each provided with a horizontal sliding groove on one side, and the connecting screw is slidably connected to the horizontal sliding groove.

3. The automatic punching device for measuring crankshaft gear shift difference as described in claim 1, characterized in that: The bottom of the guide sleeve is provided with two mounting holes corresponding to the positions of the set screw and the adjusting screw.

4. The automatic timing device for measuring crankshaft gear shift difference as described in claim 1, characterized in that: The top of the reciprocating cylinder is equipped with a wristband.

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