Large-cylinder-diameter marine diesel engine part cylinder sleeve inner hole measuring device

Abstract

The utility model relates to the technical field of cylinder sleeve inner hole measurement, in particular to a large-cylinder-diameter marine diesel engine part cylinder sleeve inner hole measuring device which comprises a cylinder sleeve, a machine tool, a measuring scale, a moving machine and a chip removal column, the cylinder sleeve is a cylindrical part and is arranged in a cylinder body hole of a machine body, and the machining link is the main step of cylinder sleeve machining. Common machining methods include turning, boring, taper machining and the like, and boring is a common inner hole machining method. The boring cutter generally adopts a mechanical boring cutter and a manual boring cutter. When the cylinder sleeve is machined, attention needs to be paid to workpiece fixation, cutter selection and machining speed, and the diameter of an inner hole of the cylinder sleeve is measured in the boring process so as to guarantee the size precision requirement; in addition, negative effects of narrow space caused by centering of the boring shaft and excessive abrasion of the inner wall of the cylinder sleeve or the boring cutter caused by accumulation of chippings need to be eliminated, so that the purposes of rapid measurement and accurate measurement are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder sleeve inner hole measurement, in particular to a device for measuring the inner hole of a cylinder sleeve of a large-diameter marine diesel engine part. Background Art

[0002] The cylinder liner is a cylindrical part, placed in the cylinder hole of the engine body, and fixed by the cylinder head. The piston reciprocates in its inner hole, and is cooled by cooling water outside;

[0003] Machining is the main step in cylinder liner processing. Common machining methods include turning, boring, taper processing, etc. Among them, boring is a commonly used internal hole processing method. Boring tools generally use machine-type boring tools and manual boring tools. When processing cylinder liners, attention should be paid to workpiece fixation, tool selection and processing speed, and the inner diameter of the cylinder liner should be measured during the boring process to ensure the dimensional accuracy requirements. During the measurement, the negative effects of the narrow space caused by the centering of the boring shaft and the excessive wear of the inner wall of the cylinder liner or the boring tool caused by the accumulation of debris should be eliminated to achieve the purpose of fast and accurate measurement.

[0004] In view of this, the utility model proposes a device for measuring the inner hole of a cylinder liner of a large-diameter marine diesel engine part, which solves the above technical problems. Utility Model Content

[0005] In order to address the deficiencies in the prior art, the utility model provides a device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part; thereby solving the problem that traditional measuring tools are difficult to accurately measure the inner bore diameter of a cylinder liner at a processing station, and it is difficult to eliminate the negative effects brought about by the increase in measurement errors caused by the boring spindle occupying the measurement space and the accumulation of debris.

[0006] The utility model solves the technical problem by adopting a technical solution to provide a device for measuring the inner hole of a cylinder liner of a large-diameter marine diesel engine part, comprising a cylinder liner, a machine tool, a measuring ruler, a mobile machine and a chip removal column, wherein a three-jaw chuck is rotatably mounted on the machine tool, the cylinder liner is fixedly mounted in the three-jaw chuck, and the measuring ruler is located in the inner hole of the cylinder liner.

[0007] The mobile machine is movably installed on the front part of the machine tool, and a machine base is fixedly installed on the upper part of the mobile machine. A boring spindle is slidably installed in the middle part of the machine base. The boring spindle is coaxial with the three-jaw chuck, and the front part of the boring spindle passes through the inner hole of the cylinder sleeve, and a card slot fixedly plugged with the end of the boring spindle is provided in the middle part of the three-jaw chuck. The measuring ruler is movably installed on the boring spindle, the rear part of the boring spindle is a fixed part, and the fixed part is fixedly installed on the machine base, and the front part of the boring spindle is a sliding part, and the sliding part is slidably installed on the fixed part. The chip removal column is rotatably installed on the end of the sliding part, and a card block fixedly fitted in the middle part of the three-jaw chuck is fixedly installed on the end of the chip removal column. A cavity is provided on the inner side of the chip removal column, and a chip removal groove connected with the cavity is opened on the side of the chip removal column facing the cylinder sleeve, the fixed part and the sliding part of the boring spindle are mutually penetrated to open an inner groove connected with the cavity inside the chip removal column, and an air pipe is installed at the end of the fixed part.

[0008] Preferably, a baffle is slidably installed in the chip removal column, the middle part of the baffle is sealed and fitted with the air inlet port, a plurality of baffle bars are hingedly installed around the baffle plate, a torsion spring is connected between the baffle bar and the baffle plate, and the side wall of the baffle bar is sealed and fitted with the chip removal groove.

[0009] Preferably, an adjustment groove is opened in the middle of the fixed part, a support plate is fixedly installed in the adjustment groove, a push ruler is slidably installed on the end of the support plate, a first scale line is provided on the side wall of the push ruler, and an indicator piece matching the first scale line is installed on the end of the support plate, and the measuring ruler is fixedly installed on the end of the push ruler.

[0010] Preferably, a boring tool is slidably mounted on one side of the machine base, a handwheel is mounted on the machine base by threaded engagement, the handwheel is rotatably connected to the boring tool mounting base, a separation ruler is fixedly mounted in the middle of the fixed part, the separation ruler runs through the middle of the boring tool, and a second scale line is printed on the separation ruler.

[0011] Preferably, a first bolt is installed on the upper part of the machine base, the end of the first bolt abuts against the outer wall of the fixing part, and a propulsion groove matched with the propulsion ruler is opened on one side of the machine base.

[0012] Preferably, the measuring ruler is a "C"-shaped structure, the middle part of the measuring ruler is fixedly mounted on the end of the thrust ruler, the measuring ruler is located in the gap between the inner hole of the cylinder liner and the boring spindle, and measuring heads are symmetrically mounted at both ends of the measuring ruler, and the axis of the measuring head is perpendicular to the axis of the cylinder liner.

[0013] Preferably, measuring columns are symmetrically installed on the upper and lower ends of the measuring head, the measuring columns are coaxial, a slot hole that slides with the measuring columns is opened at the end of the measuring head, a gear rod is rotatably installed on the inner side of the measuring head, the two measuring columns are respectively located on both sides of the gear rod, and the side surfaces of the measuring columns are provided with tooth grooves that mesh with the gear rod.

[0014] Preferably, a gear ring is slidably mounted on the inner side of the end of the measuring ruler, and the outer contour of the gear ring is meshed with the gear rod.

[0015] Preferably, a reinforcing plate is obliquely fixedly installed in the middle of the measuring ruler, the reinforcing plate is a "V"-shaped structure, and the two ends of the reinforcing plate are respectively clamped in the middle of the upper and lower measuring heads, and a second bolt is threadedly installed on the reinforcing plate, and the end of the second bolt rests on the side wall of one of the measuring columns.

[0016] Preferably, a counting wheel is rotatably mounted in the middle of the reinforcing plate, the counting wheel rolls and fits on the outer wall of the measuring column, a display is fixedly mounted in the middle of the supporting plate, and the separation ruler, the propulsion ruler and the measuring ruler are electrically connected to the display respectively.

[0017] Beneficial effects of the utility model:

[0018] (1) In the utility model, the blowing effect of the airflow accelerates the cooling of the boring working area while carrying and discharging the generated debris. The baffle in the tilted open state maintains an inclined angle with the inner wall of the cylinder liner. During the process of the airflow being discharged from the chip discharge groove, its flow direction is always inclined to the direction of the external port of the cylinder liner due to the influence of the inclination degree of the channel, so that the debris blown by it moves toward the front port of the cylinder liner and is discharged, thereby realizing the centralized collection and treatment of the debris and avoiding excessive dispersion that increases the difficulty of cleaning.

[0019] (2) In the present invention, during boring, the measuring ruler is driven by the pusher ruler to move in a direction away from the cylinder liner, so that an appropriate spacing distance is maintained between the measuring ruler and the cylinder liner, thereby facilitating the discharge of debris. During the measurement, there is no need to remove the cylinder liner. By pushing the pusher ruler forward, the measuring ruler can reach the inner side of the cylinder liner to measure the cylinder diameter. This is quick, convenient, time-saving and labor-saving, and avoids the increase of measurement size error caused by frequent removal of the cylinder liner.

[0020] (3) In the present invention, the "C"-shaped measuring ruler can enter the gap between the boring spindle and the inner hole of the cylinder liner, which fully meets the working conditions. The measuring column of the measuring tool is a standard micrometer measuring unit, so as to achieve accurate measurement of the inner hole diameter of the cylinder liner. Through the electrical connection of the sensor, the display can respectively identify and read the counting wheel rolling cycle, the separation ruler and the advancement ruler scale, thereby achieving the measurement of the predetermined depth and predetermined aperture of the inner hole of the cylinder liner, meeting various measurement requirements, and the measurement accuracy is adjustable and controllable, and the data is easy to read. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall connection structure of the utility model;

[0023] Figure 2It is a schematic diagram of the positional relationship among the cylinder sleeve, boring spindle and three-jaw chuck of the utility model;

[0024] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0025] Figure 4 It is a schematic diagram of the positional relationship between the boring shaft and the cylinder sleeve of the utility model;

[0026] Figure 5 It is a partial cross-sectional schematic diagram of the chip removal column of the utility model;

[0027] Figure 6 It is a schematic diagram of the positional relationship between the boring cutter and the boring spindle of the utility model;

[0028] Figure 7 for Figure 7 The enlarged schematic diagram of point B in FIG.

[0029] Figure 8 It is a schematic diagram of the positional relationship between the measuring ruler and the cylinder sleeve of the utility model;

[0030] Fig. 9 for Figure 8 The enlarged schematic diagram of point C in FIG.

[0031] Fig.10 for Figure 8 The enlarged schematic diagram of D in FIG.

[0032] In the figure:

[0033] 1. Cylinder sleeve; 2. Machine tool; 3. Measuring ruler; 4. Three-jaw chuck; 5. Mobile machine; 6. Machine base; 7. Boring spindle; 8. Chip removal column; 71. Fixed part; 72. Sliding part; 81. Block; 82. Chip removal groove; 711. Air pipe; 83. Baffle plate; 84. Baffle bar; 73. Adjustment groove; 74. Support plate; 75. Push ruler; 741. Indicator sheet; 61. Boring tool; 62. Hand wheel; 712. Separation ruler; 63. First bolt; 64. Push groove; 31. Measuring head; 32. Measuring column; 33. Gear rod; 321. Tooth groove; 34. Gear ring; 35. Reinforcement plate; 351. Second bolt; 352. Counting wheel; 742. Display. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following is a summary of the present invention.

[0035] The utility model is further described with reference to specific implementation methods.

[0036] The embodiment of the utility model provides a device for measuring the inner hole of a cylinder liner of a large-diameter marine diesel engine part, thereby solving the problem that traditional measuring tools are difficult to accurately measure the inner hole diameter of a cylinder liner at a processing station, and it is difficult to eliminate the negative effects caused by the increase in measurement errors due to the boring spindle occupying the measurement space and the accumulation of debris.

[0037] The cylinder liner is a cylindrical part that is placed in the cylinder block hole of the engine body and is fixed by the cylinder head. The piston reciprocates in its inner hole and is cooled by cooling water outside. Machining is the main step in the processing of cylinder liners. Common machining methods include turning, boring, taper processing, etc. Among them, boring is a commonly used inner hole processing method. Boring tools generally use mechanical boring tools and manual boring tools. When processing cylinder liners, attention should be paid to workpiece fixation, tool selection and processing speed, and the inner hole diameter of the cylinder liner should be measured during the boring process to ensure the dimensional accuracy requirements, such as Figure 1 , Figure 2 and Figure 4 As shown, a preferred embodiment of the utility model proposes a device for measuring the inner hole of a cylinder liner of a large-diameter marine diesel engine part, comprising a cylinder liner 1, a machine tool 2, a measuring ruler 3, a mobile machine 5 and a chip removal column 8. A three-jaw chuck 4 is rotatably mounted on the machine tool 2, the cylinder liner 1 is fixedly mounted in the three-jaw chuck 4, and the measuring ruler 3 is located in the inner hole of the cylinder liner 1. When working, the three-jaw chuck 4 is used to clamp and fix the cylinder liner 1.

[0038] Furthermore, in the process of boring the inner hole of the cylinder liner 1, in order to make the inner diameter measurement data of the hole accurate and avoid the accumulation of debris causing wear on the inner wall of the cylinder liner 1 or negative impact on the boring process, the debris generated in the boring process needs to be discharged in time. Figures 3 to 5As shown, the mobile machine 5 is movably mounted on the front of the machine tool 2, the upper part of the mobile machine 5 is fixedly mounted with a base 6, the middle part of the base 6 is slidably mounted with a boring spindle 7, the boring spindle 7 is coaxial with the three-jaw chuck 4, the front part of the boring spindle 7 passes through the inner hole of the cylinder sleeve 1, the middle part of the three-jaw chuck 4 is provided with a slot fixedly plugged with the end of the boring spindle 7, the measuring ruler 3 is movably mounted on the boring spindle 7, the rear part of the boring spindle 7 is a fixed part 71, the fixed part 71 is fixedly mounted on the base 6, the upper part of the base 6 is mounted with a first bolt 63, the end of the first bolt 63 is against the outer wall of the fixed part 71, the front part of the boring spindle 7 is a sliding part 72, the sliding part 72 is slidably mounted on the fixed part 71, and the chip removal column 8 is rotatably mounted on the sliding part The end of the part 72, the end of the chip removal column 8 is fixedly installed with a clamping block 81 fixedly fitted with the middle part of the three-jaw chuck 4, the inner side of the chip removal column 8 is provided with a cavity, and the chip removal column 8 is provided with a chip removal groove 82 connected with the cavity on the side facing the cylinder sleeve 1, the fixed part 71 and the sliding part 72 of the boring shaft 7 are mutually connected to form an inner groove connected with the inner cavity of the chip removal column 8, and an air pipe 711 is installed at the end of the fixed part 71, and a baffle 83 is slidably installed in the chip removal column 8, the middle part of the baffle 83 is sealed with the air inlet port, and a plurality of baffle bars 84 are hingedly installed around the baffle 83, a torsion spring is connected between the baffle bar 84 and the baffle 83, and the side wall of the baffle bar 84 is sealed with the chip removal groove 82;

[0039] During operation, the fixed portion 71 and the sliding portion 72 in the boring shaft 7 are in a stretched state. At this time, the first bolt 63 is tightened to lock the position of the fixed portion 71, and the boring shaft 7 crosses the cylinder sleeve 1. The end block 81 of the chip removal column 8 is engaged with the axial portion of the three-jaw chuck 4 to keep the boring shaft 7 and the three-jaw chuck 4 coaxial. During the boring process, the fixed portion 71 and the sliding portion 72 are stationary, and the chip removal column 8 rotates with the three-jaw chuck 4. When chips are generated during the boring process, air is introduced through the air pipe 711, and the air immediately enters the chip removal column 8 through the inner groove of the boring shaft 7. Then, the baffle 83 is lifted up by air pressure, and the air flow inlet is immediately opened. During the movement of the baffle 83, the air is pulled The movable baffle 84 is tilted and rotated, thereby opening the port of the chip groove 82. Subsequently, the airflow is discharged from the position of the chip groove 82 and blown toward the inner wall of the cylinder liner 1. Through the blowing effect of the airflow, the generated debris is carried out while the boring working area is cooled. Moreover, since the baffle 84 is in a tilted and rotating state, an inclined angle is maintained between it and the inner wall of the cylinder liner 1. During the process of the airflow being discharged from the position of the chip groove 82, its flow direction is always tilted toward the external port of the cylinder liner 1 due to the influence of the inclination degree of the channel, thereby causing the debris blown by it to move toward the front port of the cylinder liner 1 and be discharged, thereby realizing the centralized collection and processing of the debris and avoiding excessive dispersion that increases the difficulty of cleaning.

[0040] Furthermore, in order to adjust the internal bore size of the cylinder liner 1, as Figure 4 , Figure 6 and Figure 7As shown, a boring tool 61 is slidably mounted on one side of the machine base 6, and a handwheel 62 is mounted on the machine base 6 by means of threaded fitting. The handwheel 62 is rotatably connected to the mounting base of the boring tool 61. A separation ruler 712 is fixedly mounted in the middle of the fixed portion 71. The separation ruler 712 runs through the middle of the boring tool 61, and a second scale line is engraved on the separation ruler 712. During the boring operation, the diameter of the hole expanded by the boring tool 61 can be directly displayed by the position of the separation ruler 712. By manually or electrically rotating the handwheel 62, the boring tool 61 can be displaced laterally, thereby realizing the adjustment of the boring hole size.

[0041] Furthermore, in order to enable the measuring ruler 3 to quickly measure the inner diameter of the boring hole and avoid the negative impact on the measuring ruler 3 caused by the discharge of chip debris during the boring process, as shown in FIG. Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, an adjustment slot 73 is provided in the middle of the fixing portion 71, and a support plate 74 is fixedly installed in the adjustment slot 73. A push ruler 75 is slidably installed at the end of the support plate 74. The side wall of the push ruler 75 is provided with a first scale line, and an indicator sheet 741 matching the first scale line is installed at the end of the support plate 74. The measuring ruler 3 is fixedly installed at the end of the push ruler 75. A push groove 64 matching the push ruler 75 is provided on one side of the machine base 6. During the idle period when the aperture measurement is not performed, the staff pulls the push ruler 75, and the push ruler 75 drives the measuring ruler 3 to move away from the cylinder sleeve 1, so that the measuring ruler 3 and the cylinder sleeve 1 maintain an appropriate spacing distance, thereby facilitating the discharge of debris. When the measurement work is in progress, there is no need to remove the cylinder sleeve 1. By pushing the push ruler 75 forward, the measuring ruler 3 can reach the inner side of the cylinder sleeve 1 to measure the cylinder diameter. This is fast, convenient, time-saving and labor-saving, and avoids the increase of measurement size error caused by frequent removal of the cylinder sleeve 1.

[0042] Furthermore, in order to reduce the measurement difficulty, the influence of the central position of the boring spindle 7 on the measurement space is eliminated, such as Figure 6 , Figure 8 , Fig. 9 and Fig.10As shown, the measuring ruler 3 is a "C"-shaped structure, the middle part of the measuring ruler 3 is fixedly installed on the end of the propulsion ruler 75, the measuring ruler 3 is located in the gap between the inner hole of the cylinder liner 1 and the boring shaft 7, and the measuring heads 31 are symmetrically installed at both ends of the measuring ruler 3. The axis of the measuring head 31 is perpendicular to the axis of the cylinder liner 1, and the measuring columns 32 are symmetrically installed at the upper and lower ends of the measuring head 31. The measuring columns 32 are coaxial, and a slot hole that slides with the measuring columns 32 is opened at the end of the measuring head 31. A gear rod 33 is rotatably installed inside the measuring head 31. The two measuring columns 32 are respectively located on both sides of the gear rod 33, and the sides of the measuring columns 32 are provided with tooth grooves 321 that mesh with the gear rod 33. A gear ring 34 is slidably installed inside the end of the measuring ruler 3, and the outer contour of the gear ring 34 meshes with the gear rod 33.

[0043] During operation, the "C"-shaped measuring ruler 3 can enter the gap between the boring spindle 7 and the inner hole of the cylinder liner 1, fully adapting to the working conditions. The measuring ruler 3 is sent into the inner hole of the cylinder liner 1 by pushing the ruler 75. At this time, the two measuring heads 31 symmetrically arranged up and down are automatically located at the two ends of the inner hole diameter of the cylinder liner 1. Subsequently, the gear ring 34 is pushed to move, and the gear ring 34 drives the gear rod 33 to mesh and rotate. The gear rod 33 further meshes with the tooth groove 321 to make the measuring column 32 protrude to the outside of the measuring head 31 and abut against the inner hole position of the cylinder liner 1. The measuring column 32 of the measuring tool is a standard micrometer measuring unit, thereby realizing accurate measurement of the inner hole diameter of the cylinder liner 1.

[0044] Furthermore, in order to improve the convenience of reading measured values, Figure 6 , Figure 7 , Figure 8 and Fig.10 As shown, a reinforcing plate 35 is fixedly installed obliquely in the middle of the measuring ruler 3. The reinforcing plate 35 is a "V"-shaped structure, and the two ends of the reinforcing plate 35 are respectively clamped in the middle of the upper and lower measuring heads 31. A second bolt 351 is threadedly installed on the reinforcing plate 35, and the end of the second bolt 351 abuts against the side wall of one of the measuring columns 32. A counting wheel 352 is rotatably installed in the middle of the reinforcing plate 35, and the counting wheel 352 rolls and fits on the outer wall of the measuring column 32. A display 742 is fixedly installed in the middle of the support plate 74, and the separation ruler 712, the propulsion ruler 75 and the measuring ruler 3 are respectively electrically connected to the display 742.

[0045] During operation, since the measuring column 32 in the measuring head 31 is coaxially and bidirectionally arranged, in the process of the measuring column 32 at the first station being fitted to the inner wall of the cylinder liner 1, the measuring column 32 at the second station synchronously extends the measuring head 31 in the opposite direction. At this time, the counting wheel 352 rolls under the abutment of the measuring column 32, and records the extended length of the measuring column 32 through the rolling cycle. When the measuring column 32 at the first station is fitted to the inner wall of the cylinder liner 1, the position of the measuring column 32 is locked by the second bolt 351. Through the electrical connection performed by the sensor, the display 742 can respectively identify and read the rolling cycle of the counting wheel 352, the separation ruler 712 and the scale of the advancement ruler 75, thereby realizing the measurement of the predetermined depth and predetermined aperture of the inner hole of the cylinder liner 1, meeting various measurement requirements, and the measurement accuracy is adjustable and controllable, and the data reading is convenient.

[0046] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A device for measuring the inner hole of a cylinder liner of a large-diameter marine diesel engine part, comprising a cylinder liner (1), a machine tool (2) and a measuring ruler (3), wherein a three-jaw chuck (4) is rotatably mounted on the machine tool (2), the cylinder liner (1) is fixedly mounted in the three-jaw chuck (4), and the measuring ruler (3) is located in the inner hole of the cylinder liner (1), characterized in that: Also includes A mobile machine (5), wherein the mobile machine (5) is movably mounted on the front of the machine tool (2), a base (6) is fixedly mounted on the upper part of the mobile machine (5), a boring shaft (7) is slidably mounted in the middle of the base (6), the boring shaft (7) is coaxial with the three-jaw chuck (4), the front of the boring shaft (7) passes through the inner hole of the cylinder sleeve (1), the middle of the three-jaw chuck (4) is provided with a slot fixedly plugged with the end of the boring shaft (7), and a measuring ruler (3) is movably mounted on the boring shaft (7); A chip removal column (8), wherein the rear portion of the boring shaft (7) is a fixed portion (71), the fixed portion (71) is fixedly mounted on the machine base (6), the front portion of the boring shaft (7) is a sliding portion (72), the sliding portion (72) is slidably mounted on the fixed portion (71), the chip removal column (8) is rotatably mounted on the end of the sliding portion (72), a clamping block (81) fixedly mounted on the middle portion of the three-jaw chuck (4) is fixedly mounted on the end of the chip removal column (8), a cavity is arranged on the inner side of the chip removal column (8), a chip removal groove (82) connected to the cavity is opened on the side of the chip removal column (8) facing the cylinder sleeve (1), the fixed portion (71) and the sliding portion (72) of the boring shaft (7) are mutually connected to open an inner groove connected to the inner cavity of the chip removal column (8), and an air pipe (711) is installed on the end of the fixed portion (71).

2. According to the device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part as described in claim 1, it is characterized in that: A baffle (83) is slidably mounted in the chip removal column (8), the middle portion of the baffle (83) is sealed against the air inlet port, a plurality of baffle bars (84) are hingedly mounted around the baffle (83), a torsion spring is connected between the baffle bar (84) and the baffle (83), and the side wall of the baffle bar (84) is sealed against the chip removal groove (82).

3. According to the device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part as described in claim 1, it is characterized in that: An adjusting groove (73) is provided in the middle of the fixing portion (71), a supporting plate (74) is fixedly mounted in the adjusting groove (73), a push ruler (75) is slidably mounted on the end of the supporting plate (74), a first scale line is provided on the side wall of the push ruler (75), and an indicating piece (741) matching the first scale line is mounted on the end of the supporting plate (74), and a measuring ruler (3) is fixedly mounted on the end of the push ruler (75).

4. The device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part according to claim 1, characterized in that: A boring tool (61) is slidably mounted on one side of the machine base (6); a hand wheel (62) is mounted on the machine base (6) by means of threaded engagement; the hand wheel (62) is rotatably connected to a mounting base of the boring tool (61); a separation ruler (712) is fixedly mounted in the middle of the fixed portion (71); the separation ruler (712) passes through the middle of the boring tool (61), and a second scale line is printed on the separation ruler (712).

5. According to the device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part as described in claim 3, it is characterized in that: A first bolt (63) is installed on the upper portion of the machine base (6), the end of the first bolt (63) abuts against the outer wall of the fixing portion (71), and a propulsion groove (64) adapted to the propulsion ruler (75) is provided on one side of the machine base (6).

6. The device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part according to claim 3, characterized in that: The measuring ruler (3) is a "C"-shaped structure. The middle part of the measuring ruler (3) is fixedly mounted on the end of the thrust ruler (75). The measuring ruler (3) is located in the gap between the inner hole of the cylinder liner (1) and the boring shaft (7). Measuring heads (31) are symmetrically mounted at both ends of the measuring ruler (3). The axis of the measuring head (31) is perpendicular to the axis of the cylinder liner (1).

7. A device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part according to claim 6, characterized in that: The measuring head (31) is symmetrically mounted with measuring columns (32) at the upper and lower ends thereof, the measuring columns (32) being coaxial, a slot hole slidably engaged with the measuring columns (32) is provided at the end of the measuring head (31), a gear rod (33) is rotatably mounted inside the measuring head (31), the two measuring columns (32) are respectively located on both sides of the gear rod (33), and the side surfaces of the measuring columns (32) are each provided with a tooth groove (321) engaged with the gear rod (33).

8. The device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part according to claim 7, characterized in that: A gear ring (34) is slidably mounted on the inner side of the end of the measuring ruler (3), and the outer contour of the gear ring (34) is meshed with the gear rod (33).

9. The device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part according to claim 7, characterized in that: A reinforcing plate (35) is fixedly installed in an inclined manner in the middle of the measuring ruler (3). The reinforcing plate (35) is a "V"-shaped structure, and the two ends of the reinforcing plate (35) are respectively clamped in the middle of the upper and lower measuring heads (31). A second bolt (351) is threadedly installed on the reinforcing plate (35), and the end of the second bolt (351) abuts against the side wall of one of the measuring columns (32).

10. A device for measuring the inner bore of a cylinder liner of a large-diameter marine diesel engine part according to claim 9, characterized in that: A counting wheel (352) is rotatably mounted in the middle of the reinforcing plate (35), and the counting wheel (352) rolls and fits against the outer wall of the measuring column (32). A display (742) is fixedly mounted in the middle of the supporting plate (74), and the separation ruler (712), the propulsion ruler (75) and the measuring ruler (3) are electrically connected to the display (742) respectively.

Images