CN114770430A - Special tool for assembling and disassembling piston ring of large marine diesel engine - Google Patents
Special tool for assembling and disassembling piston ring of large marine diesel engine Download PDFInfo
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- CN114770430A CN114770430A CN202210404792.3A CN202210404792A CN114770430A CN 114770430 A CN114770430 A CN 114770430A CN 202210404792 A CN202210404792 A CN 202210404792A CN 114770430 A CN114770430 A CN 114770430A
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- piston ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/12—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same mounting or demounting piston rings
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- Mechanical Engineering (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The invention discloses a special tool for assembling and disassembling a large marine diesel engine piston ring, which comprises an electric screwdriver, an outer sleeve, a connecting sleeve, a screw rod slide block transmission mechanism and a piston ring hooking mechanism, wherein the electric screwdriver, the outer sleeve and the connecting sleeve are fixedly connected in sequence. One end of the electric screwdriver is fixedly connected with one end of a screw rod sliding block transmission mechanism in the connecting sleeve. One end of a connecting rod of the piston ring hooking mechanism is respectively hinged with two sides of the screw rod sliding block transmission mechanism, and the other end of the connecting rod is respectively hinged with the middle part of the sliding hook plate. The sliding hook plates are respectively embedded at one corresponding end of the arc-shaped guide plate, the adjacent ends of the sliding hook plates are respectively provided with a hook head for hooking the open end of the piston ring, and a guide mechanism and a limiting mechanism are arranged between the corresponding ends of the sliding hook plates and the arc-shaped guide plate. The invention greatly reduces the labor intensity of piston ring assembly and disassembly and avoids injuring the fingers of an operator. Obviously improves the assembly and disassembly efficiency of the piston ring and is safer to operate.
Description
Technical Field
The invention relates to a tool for detaching a piston ring of an internal combustion engine, in particular to a special tool for detaching a piston ring of a large marine diesel engine with the cylinder diameter larger than 150mm, and belongs to the technical field of bench tools.
Background
The large marine diesel engine has powerful power, can use heavy oil with lower cost, can meet the Tier III emission regulation of the International maritime organization, and is more and more favored by the market. Because the inner diameter of a piston ring (comprising an air seal ring and a scraper ring) used by a large diesel engine is larger than 150mm, the manufacturing cost is relatively expensive, and the assembly and disassembly are difficult. At present, when a piston ring needs to be disassembled in the installation or maintenance of a large marine diesel engine, a bench worker manually breaks the piston ring by using a caliper tool or a tool, so that the inner diameter of the piston ring is larger than the outer diameter of a piston, and the piston ring can be installed in a piston ring groove or taken out from the piston ring groove. Because the force for manually breaking the piston ring is difficult to control, the breaking force is too small, and the piston ring cannot be arranged in the piston ring groove; the piston ring is easy to break off when the breaking force is too large, even hands are injured, and certain potential safety hazards exist. In addition, the piston ring of the large marine diesel engine has high quality, can be broken off only by a certain wrist force, and has high labor intensity and high difficulty in operation by a fitter with low physical strength.
Disclosure of Invention
The invention aims to provide a special tool for assembling and disassembling a large marine diesel engine piston ring, which improves the success rate of assembling and disassembling the piston ring and avoids safety accidents.
The invention is realized by the following technical scheme:
a special tool for mounting and dismounting a piston ring of a large marine diesel engine comprises an electric screwdriver, an outer sleeve, a connecting sleeve, a screw rod slider transmission mechanism and a piston ring hooking mechanism, wherein one end of the outer sleeve is fixed at one end of a handle of the electric screwdriver, the other end of the outer sleeve is fixedly connected with one end of the connecting sleeve, the screw rod slider transmission mechanism is positioned in the connecting sleeve, a hexagonal head of the electric screwdriver is fixedly connected with one end of the screw rod slider transmission mechanism, the other end of the screw rod slider transmission mechanism is supported in a sealing plate at the end of the other end of the connecting sleeve, and one end of a trapezoidal connector is fixed on the sealing plate; the piston ring hooking mechanism comprises an arc-shaped guide plate, a pair of sliding hook plates with U-shaped cross sections and two connecting rods, one end of each connecting rod is hinged with two sides of the screw rod slider transmission mechanism, the other end of each connecting rod is hinged with the middle part of the U-shaped closed side of each sliding hook plate, and the other end of each trapezoidal connecting head is fixedly connected with a radial protrusion, deviating from the arc direction, in the middle part of each arc-shaped guide plate; the U-shaped opening sides of the sliding hook plates are respectively embedded in one corresponding end of the arc-shaped guide plate, the adjacent ends of the pair of sliding hook plates are respectively provided with a hook head, and the shape of the hook head is matched with the shape of the opening end of the piston ring; a guide mechanism and a limiting mechanism are arranged between the corresponding ends of the sliding hook plate and the arc-shaped guide plate.
The object of the invention is further achieved by the following technical measures.
Furthermore, the guide mechanism comprises two groups of guide assemblies, the guide assemblies are respectively arranged at two opposite corners of the sliding hook plate, each guide assembly comprises a transverse pin and a distance tube, the transverse pins respectively transversely penetrate through the two opposite corners of the sliding hook plate, and two ends of each transverse pin are respectively limited by elastic check rings for shafts; the distance pipe sleeves the middle part of the transverse pin, and the distance pipe respectively supports against the middle part and one end of the arc-shaped guide plate and is positioned on two sides of the arc-shaped guide plate.
Furthermore, stop gear includes spacer pin and arc spacing groove, the both ends of arc deflector are crossed to the spacer pin, and the perpendicular fixation is respectively on the both ends of arc deflector in the spacer pin middle part, and the arc spacing groove sets up respectively on the middle part both sides of slip hook plate, and the corresponding arc spacing groove is stretched into respectively at the spacer pin both ends, and the spacer pin diameter matches with the width in arc spacing groove.
Furthermore, the screw rod and slide block transmission mechanism comprises a screw rod and a slide block, one end of the screw rod is fixedly inserted on a hexagonal head of the electric screwdriver, the slide block is screwed on the other end of the screw rod, the end head of the other end of the screw rod is supported in a sealing plate at the end head of the other end of the connecting sleeve, and the slide block is plugged in the connecting sleeve; the slider both sides respectively with a pair of swash plate one end fixed connection, the swash plate inclines towards arc deflector direction, and the spout of the connecting sleeve other end both sides is stretched out respectively to the swash plate other end, and with spout clearance fit, swash plate other end is articulated with connecting rod one end respectively.
Furthermore, the hook head is in an inverted L shape, and the height H of the inner side of the inverted L shape is matched with the width B of the end of the piston ring.
The invention adopts the electric screwdriver as a power source, so that the sliding block of the screw rod sliding block transmission mechanism moves back and forth more conveniently and more labor-saving, and the connecting rod of the piston ring hooking mechanism drives the pair of sliding hook plates to symmetrically slide along the two ends of the arc-shaped guide plate, so that the hook heads at the ends of the pair of sliding hook plates hook the opening end of the piston ring and then move in opposite directions to open the piston ring. The stable precision of transmission is high, and the slip of a pair of slip hook plate receives guiding mechanism's accurate direction, is convenient for enlarge the distance between the open end of piston ring, and the piston ring of being more convenient for breaks away from the piston ring groove. The sliding of the pair of sliding hook plates is limited by the limiting mechanism, so that the sliding hook plates cannot be separated from the arc-shaped guide plate. The invention mainly adopts the force of arms to complete the assembly and disassembly of the piston ring, greatly lightens the labor intensity of the assembly and disassembly of the piston ring and avoids injuring the fingers of an operator. Obviously improves the assembly and disassembly efficiency of the piston ring and avoids damaging the piston ring due to assembly and disassembly. The operation is safer. The piston rings of different types of marine diesel engines can be assembled and disassembled only by replacing the sliding hook plate and the arc-shaped guide plate with corresponding sizes, and the universality is good.
Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of a disassembled piston ring using the present invention;
FIG. 4 is an enlarged sectional view A-A of FIG. 1;
fig. 5 is an enlarged view of a portion i of fig. 3.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1 to 4, the present embodiment includes an electric screwdriver 1, an outer sleeve 2, a connecting sleeve 3, a screw rod slider transmission mechanism 4 and a piston ring hooking mechanism 5, the electric screwdriver 1 of the present embodiment is a high-power lithium battery electric screwdriver, the torsion is greater than or equal to 20kg/cm, the weight is less than or equal to 1kg, and the present embodiment has a forward and reverse rotation function. The left end of the outer sleeve 2 is sleeved on the right end of a handle 11 of the electric screwdriver 1, and the left end of the outer sleeve 2 is fixed on the right end of the handle 11 through 2 groups of 4 set screws 21 which are symmetrically arranged. The left end flange 31 of the connecting sleeve is embedded in the right end port of the outer sleeve 2, and the left end of the connecting sleeve 3 is fixedly connected with the right end of the outer sleeve 2 through a plurality of connecting screws 32. The left end of the trapezoid connector 6 is fixed on a sealing plate 33 at the right end of the connecting sleeve 3.
The piston ring hooking mechanism 5 comprises an arc-shaped guide plate 51, a pair of sliding hook plates 52 with U-shaped cross sections and two connecting rods 53, the left ends of the connecting rods 53 are respectively hinged with the two sides of the screw rod slide block transmission mechanism 4, the right ends of the connecting rods 53 are respectively hinged with the middle parts of the U-shaped closed sides of the sliding hook plates 52, and the right ends of the trapezoidal connectors 6 are fixedly connected with radial protrusions 511, deviating from the arc direction, in the middle parts of the arc-shaped guide plates 51 through 2 fastening screws 54. The U-shaped opening sides of the sliding hook plates 53 are respectively embedded in one end of the arc-shaped guide plate 51, the adjacent ends of the pair of sliding hook plates 52 are respectively provided with a hook head 521, the shape of the hook head 521 is matched with the shape of the opening end of the piston ring 10, as shown in fig. 5, the hook head 521 is in an inverted L shape, the height H of the inner side of the inverted L shape is matched with the width B of the end of the piston ring, and the hook head 521 can pull the opening end of the piston ring 10.
The screw rod and slider transmission mechanism 4 is positioned in the connecting sleeve 3 and comprises a screw rod 41 and a slider 42, the left end of the screw rod 41 is fixedly inserted into the hexagonal head 12 of the electric screwdriver 1, the slider 42 is screwed on the right end of the screw rod 41, the right end of the screw rod 41 is supported in a sealing plate 33 at the right end of the connecting sleeve 3, and the slider 42 is plugged into the connecting sleeve 3. Both sides of the sliding block 42 are respectively welded and fixed with one end of a pair of inclined plates 421, the inclined plates 421 incline towards the direction of the piston ring hooking mechanism 5, and the other ends of the inclined plates 421 respectively extend out of the sliding grooves 34 on both sides of the right end of the connecting sleeve 3 and are in clearance fit with the sliding grooves 34, so that the inclined plates 421 can move more stably. The other end of the inclined plate 421 is hinged with the left end of the connecting rod 53.
A guide mechanism 55 and a limiting mechanism 56 are arranged between the corresponding ends of the sliding hook plate 52 and the arc-shaped guide plate 51. The guide mechanism 55 includes two sets of guide components, the guide components are respectively arranged at two opposite corners of the sliding hook plate 52, the guide components include a cross pin 551 and a distance tube 552, the cross pin 552 respectively traverses two opposite corners of the sliding hook plate 52, and two ends of the cross pin 551 are respectively limited by a circlip 553 for shaft. The distance tube 552 is sleeved on the middle part of the transverse pin 551, the distance tube 552 respectively abuts against the middle part and one end of the arc guide plate 51 and is positioned at two sides of the arc guide plate 51, and the distance tube 552 and two side edges of the arc guide plate 51 are in rolling friction, so that the sliding resistance of the pair of sliding hook plates 52 on the arc guide plate 51 is smaller, and the sliding position of the sliding hook plate 52 is more accurate.
The limiting mechanism 56 comprises a limiting pin 561 and an arc-shaped limiting groove 562, the limiting pin 561 penetrates through two ends of the arc-shaped guide plate 51, the middle of the limiting pin 561 is vertically fixed on two ends of the arc-shaped guide plate 51, the arc-shaped limiting groove 562 is arranged on two sides of the middle of the sliding hook plate 52, two ends of the limiting pin 561 extend into the corresponding arc-shaped limiting grooves 562, and the diameter of the limiting pin 561 is matched with the width of the arc-shaped limiting groove 562. The limit mechanism 56 determines the limit position of the sliding hook plate 52 on the arc guide plate 51, and effectively prevents the sliding hook plate 52 from being separated from the arc guide plate 51.
The process of disassembling the piston ring 10 using the present invention is as follows:
1. firstly, the electric screwdriver 1 is adjusted to be in a forward rotation state, then the starting button of the electric screwdriver 1 is pressed, the screw rod 41 rotates forward, the sliding block 42 moves leftwards towards the handle 11 of the electric screwdriver 1, the connecting rod 1 is pulled to translate towards the handle 11 of the electric screwdriver 1 through the pair of inclined plates 42 on the two sides of the sliding block 42, the pair of sliding hook plates 52 relatively slide towards the axial direction of the screw rod 41 along the arc-shaped guide plate 51, the hook heads 521 approach each other until the distance C between the two hook heads 521 is smaller than the distance D at the opening of the piston ring, the starting button is released, the screw rod 41 stops rotating forward, and the hook heads 521 stop sliding.
2. The invention is lifted up by holding the handle 11 of the electric screwdriver 1 until the hook 521 of the invention is consistent with the height of the opening of the piston ring 10, and then the pair of hook 521 is inserted into the opening of the piston ring 10 to hook the two ends of the opening of the piston ring 10 respectively.
3. The electric screwdriver 1 is adjusted to be in a reverse rotation state, a start button of the electric screwdriver 1 is pressed, the lead screw 41 reverses, the sliding block 42 moves towards the piston ring 10, namely moves towards the right, the connecting rod 1 is pushed to translate towards the piston ring 10 through the inclined plates 42 on the two sides of the sliding block 42, the sliding hook plates 52 respectively slide towards the two ends of the arc-shaped guide plate 51, the hook heads 521 respectively push the ends of the piston ring 10 to be away from each other, the inner diameter of the piston ring 10 is larger than the outer diameter phi of the piston, the piston ring 10 starts to be separated from the piston ring groove 101 until the limiting pins 561 respectively slide to the outer ends of the arc-shaped limiting grooves 562, the start button is released, the lead screw 41 stops reversing, and the hook heads 521 stop sliding. At this time, the present invention can be lifted up, and the piston ring 10 is moved up to be separated from the piston 100, so that the disassembly of the piston ring 10 is completed, and the use is very convenient.
In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.
Claims (5)
1. A special tool for mounting and dismounting a piston ring of a large marine diesel engine is characterized by comprising an electric screwdriver, an outer sleeve, a connecting sleeve, a lead screw slider transmission mechanism and a piston ring hooking mechanism, wherein one end of the outer sleeve is fixed at one end of a handle of the electric screwdriver, the other end of the outer sleeve is fixedly connected with one end of the connecting sleeve, the lead screw slider transmission mechanism is positioned in the connecting sleeve, a hexagonal head of the electric screwdriver is fixedly connected with one end of the lead screw slider transmission mechanism, the other end of the lead screw slider transmission mechanism is supported in a sealing plate at the end head of the other end of the connecting sleeve, and one end of a trapezoidal connector is fixed on the sealing plate; the piston ring hooking mechanism comprises an arc-shaped guide plate, a pair of sliding hook plates with U-shaped cross sections and two connecting rods, one end of each connecting rod is hinged with two sides of the screw rod slider transmission mechanism, the other end of each connecting rod is hinged with the middle part of the U-shaped closed side of each sliding hook plate, and the other end of each trapezoidal connecting head is fixedly connected with a radial protrusion, deviating from the arc direction, in the middle part of each arc-shaped guide plate; the U-shaped opening sides of the sliding hook plates are respectively embedded in one corresponding end of the arc-shaped guide plate, the adjacent ends of the pair of sliding hook plates are respectively provided with a hook head, and the shape of the hook head is matched with that of the opening end of the piston ring; a guide mechanism and a limiting mechanism are arranged between the corresponding ends of the sliding hook plate and the arc-shaped guide plate.
2. The special tool for assembling and disassembling a piston ring of a large-scale marine diesel engine according to claim 1, wherein the guide mechanism comprises two groups of guide assemblies, the guide assemblies are respectively arranged at two opposite corners of the sliding hook plate, the guide assemblies comprise transverse pins and distance pipes, the transverse pins respectively penetrate through the two opposite corners of the sliding hook plate, and two ends of each transverse pin are respectively limited by elastic retaining rings for shafts; the distance pipe sleeves the middle part of the transverse pin, and the distance pipe respectively supports against the middle part and one end of the arc-shaped guide plate and is positioned on two sides of the arc-shaped guide plate.
3. The special tool for mounting and dismounting a piston ring of a large-scale marine diesel engine as claimed in claim 1, wherein the limiting mechanism comprises a limiting pin and an arc-shaped limiting groove, the limiting pin crosses both ends of the arc-shaped guide plate, the middle part of the limiting pin is vertically fixed on both ends of the arc-shaped guide plate, the arc-shaped limiting groove is arranged on both sides of the middle part of the sliding hook plate, both ends of the limiting pin extend into the corresponding arc-shaped limiting grooves, and the diameter of the limiting pin is matched with the width of the arc-shaped limiting groove.
4. The special tool for mounting and dismounting a piston ring of a large marine diesel engine according to claim 1, wherein the screw-block transmission mechanism comprises a screw and a block, one end of the screw is inserted and fixed on a hexagonal head of an electric screwdriver, the block is screwed on the other end of the screw, the other end of the screw is supported in a sealing plate at the other end of a connecting sleeve, and the block is inserted into the connecting sleeve; the slider both sides respectively with a pair of swash plate one end fixed connection, the swash plate inclines towards arc deflector direction, and the spout of the connecting sleeve other end both sides is stretched out respectively to the swash plate other end, and with spout clearance fit, swash plate other end is articulated with connecting rod one end respectively.
5. The special tool for mounting and dismounting a piston ring of a large-scale marine diesel engine as claimed in claim 1, wherein the hook head is in an inverted L shape, and the height H of the inner side of the inverted L shape is matched with the width B of the end of the piston ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210404792.3A CN114770430A (en) | 2022-04-18 | 2022-04-18 | Special tool for assembling and disassembling piston ring of large marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210404792.3A CN114770430A (en) | 2022-04-18 | 2022-04-18 | Special tool for assembling and disassembling piston ring of large marine diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114770430A true CN114770430A (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210404792.3A Pending CN114770430A (en) | 2022-04-18 | 2022-04-18 | Special tool for assembling and disassembling piston ring of large marine diesel engine |
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| CN (1) | CN114770430A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116175482A (en) * | 2022-11-09 | 2023-05-30 | 沪东中华造船(集团)有限公司 | Device and method for disassembling and assembling piston ring of large diesel engine |
-
2022
- 2022-04-18 CN CN202210404792.3A patent/CN114770430A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116175482A (en) * | 2022-11-09 | 2023-05-30 | 沪东中华造船(集团)有限公司 | Device and method for disassembling and assembling piston ring of large diesel engine |
| CN116175482B (en) * | 2022-11-09 | 2024-06-11 | 沪东中华造船(集团)有限公司 | Device and method for disassembling and assembling piston ring of large diesel engine |
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