CN216126917U - Double-top supporting type grinding tool for crosshead pin of marine diesel engine - Google Patents
Double-top supporting type grinding tool for crosshead pin of marine diesel engine Download PDFInfo
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- CN216126917U CN216126917U CN202121878884.2U CN202121878884U CN216126917U CN 216126917 U CN216126917 U CN 216126917U CN 202121878884 U CN202121878884 U CN 202121878884U CN 216126917 U CN216126917 U CN 216126917U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 60
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229910001651 emery Inorganic materials 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 7
- 238000003754 machining Methods 0.000 description 5
- 230000009191 jumping Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Abstract
A double-top supporting type grinding tool for a crosshead pin of a marine diesel engine comprises two fixed discs, two transmission discs, a transmission rod and a plurality of adjusting screws; wherein, two fixed disks are fixed connection respectively in the central screw hole at cross head pin both ends, two driving disks overlap respectively and arrange the outer end of these two fixed disks in and through adjusting screw fixed connection on the fixed disk, the center of driving disk is equipped with the apex hole, two tops of grinding machine push up respectively in the apex hole of two driving disks, the transfer line is connected on the excircle of fixed disk, the driving rod is fixed in the outward flange department of lathe chuck and contacts with the outer tip of transfer line, rotatory lathe chuck passes through the driving rod and stirs the transfer line, and then it is rotatory around the axis of two tops to drive the cross head pin, accomplish the grinding to the excircle of cross head pin through the emery wheel. The utility model has the advantages of safe, rapid and convenient operation and wide application range, improves the working efficiency, ensures the product quality and can be used for grinding various cross head pins.
Description
Technical Field
The utility model relates to processing technical equipment of a large marine diesel engine component, in particular to a double-tip supporting type grinding tool for a crosshead pin of a marine diesel engine, and belongs to the technical field of machining.
Background
The crosshead pin is one of the important moving parts of the high-power low-speed marine diesel engine, and has large volume, heavy weight and higher requirement on the roughness of the excircle, so that the crosshead pin needs to grind the excircle before the whole machining is finished, and the proper grinding means is adopted to achieve the key problems of accuracy and high efficiency in the machining process. At present, a grinding and clamping mode adopted by a large-machine-type crosshead pin in the industry is mostly a mode of fixing a bracket and a transmission rod, but the traditional grinding mode obviously has the following defects and shortcomings:
1. the stability is poor in the supporting and grinding process, and vibration lines, twill lines and the like are easy to generate;
2. the lubrication is not in place, and the contact surface is easy to generate larger friction resistance;
3. manual cooling and lubrication are not in place, and a large amount of heat is easily generated on a contact surface;
4. the support is easily worn and replaced frequently.
Therefore, the adoption of a proper crosshead pin grinding device is the key point for improving the working and machining precision.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a double-tip supporting type grinding tool for a crosshead pin of a marine diesel engine, which solves the problems of friction and resistance generated in the traditional grinding process of the excircle of the crosshead pin, effectively reduces the contact surface, and achieves the purposes of low cost, high effect, workload reduction, simplicity and convenience in operation and good grinding surface.
Based on the purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a marine diesel engine cross head is two summit supporting formula grinding frock for round pin, erects between two summit of grinding machine, its characterized in that: the double-center supporting type grinding tool comprises two fixed discs, two transmission discs, a transmission rod and a plurality of adjusting screws; the two fixing discs are respectively and fixedly connected into central threaded holes at two ends of the cross head pin, the two transmission discs are respectively sleeved at the outer ends of the two fixing discs and are fixedly connected onto the fixing discs through the adjusting screws, a center hole is formed in the center of each transmission disc, two centers of the grinding machine are respectively tightly propped into the center holes of the two transmission discs, the transmission rod is radially connected onto the outer circle of the fixing disc through threads, the transmission rod is axially fixed at the outer edge of a machine tool chuck of the grinding machine and is in contact with the outer end part of the transmission rod, the rotary machine tool chuck stirs the transmission rod through the transmission rod, and further the fixing discs and the cross head pin are driven to rotate around the axes of the two centers of the grinding machine, and the grinding of the outer circle of the pin is completed through the grinding wheel.
As a further improvement, the double-top supporting type grinding tool further comprises a gasket, and the gasket is clamped between the fixed disc and the end face of the crosshead pin.
As a further improvement, the adjusting screw further comprises a special wrench for operating the adjusting screw.
As a further improvement, the fixed disk is in a stepped cylindrical shape and comprises a cylindrical part and a threaded part, the threaded part is connected with a central threaded hole of the crosshead pin, an axial groove is formed in the outer circle of the cylindrical part, and a threaded hole used for connecting and mounting the transmission rod is formed in the radial direction.
As a further improvement, one end of the transmission rod is provided with a connecting thread connected with the threaded hole of the fixed disc.
As a further improvement, the transmission disc is a round basin-shaped component, the inner cavity of the transmission disc is sleeved on the periphery of the cylindrical part of the fixed disc, and the peripheral wall of the inner cavity is provided with a radial thread through hole.
As a further improvement, the adjusting screw comprises a square head part, an adjusting thread part and a positioning block which are sequentially connected, the square head part is used for rotating the adjusting screw, the adjusting thread part is screwed into the thread through hole of the transmission disc, and the positioning block is slidably embedded into the groove on the excircle of the fixed disc.
As a further improvement, the number of the adjusting screws is four, the number of the threaded through holes of the transmission disc is four, and the threaded through holes are uniformly distributed on the periphery of the transmission disc, and the number of the grooves of the fixed disc is four, and the grooves are uniformly distributed on the periphery of the cylindrical part of the fixed disc.
Compared with the traditional grinding mode, the utility model has the following advantages:
the product quality is improved because only two centers are used for clamping the cross head pin, so that the friction force and heat caused by the contact between the excircle of the cross head pin and the bracket in the traditional supporting and grinding mode can be greatly reduced, the friction resistance and heat caused by improper lubrication and transmission in the grinding process are effectively reduced, and the grinding processing quality of the cross head pin is ensured.
The practicability is strong, the operation is fast and convenient, because the grinding device (the fixed disc, the transmission disc and the transmission rod) with double centers is adopted, the operation of operators can be more convenient, and the working efficiency is improved.
The operation safety is improved, the labor intensity of operators is reduced, namely the grinding bracket does not need to be placed on a machine tool guide rail in advance, the lubricating pipeline does not need to be opened and closed by the operators, the size of the bracket does not need to be repeatedly adjusted according to workpieces with different sizes, and the grinding can be started only by installing the double-center supporting type grinding tool.
The utility model has wide application range, and because the transmission disc with the center hole is connected with the center, the utility model can be applied to the crosshead pin with central threaded holes on two end surfaces for cylindrical grinding operation.
In a word, the double-tip supporting type grinding tool for the crosshead pin of the marine diesel engine has the advantages of safety in operation, rapidness, convenience and wide application range, has the beneficial effects of improving the working efficiency and ensuring the product quality, and can be used for grinding various crosshead pins of large marine diesel engines.
Drawings
Fig. 1 is a schematic view of the structure of the cross pin.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic structural view of the fixed disk.
Fig. 4 is a left side view of fig. 3.
Fig. 5 is a schematic view of the structure of the transmission disc.
Fig. 6 is a left side view of fig. 5.
Fig. 7 is a schematic view of the structure of the transmission rod.
Fig. 8 is a schematic view of an adjustment screw.
Fig. 9 is a view from direction a of fig. 8.
Fig. 10 is a state diagram of the use of the present invention.
In the figure:
1-machine tool chuck, 2-drive rod, 3-drive rod, 31-connecting thread, 4-crosshead pin, 41-central threaded hole, 5-special spanner, 6-drive plate, 61-inner cavity, 62-apex hole, 63-thread through hole, 7-apex, 8-gasket, 9-fixed plate, 91-cylindrical part, 92-thread part, 93-groove, 94-threaded hole, 10-adjusting screw, 101-square head, 102-adjusting thread part, and 103-positioning block.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, but the scope of the present invention is not limited thereto.
The double-top supporting type grinding tool is used for carrying out cylindrical grinding operation on a crosshead pin of a large marine diesel engine on a grinding machine. Referring to fig. 1 and 2, a central threaded hole 41 is formed in the center of both end surfaces of the cross pin 4. The grinding machine is provided with a machine chuck 1 and an opposite tip 7, see fig. 10.
Referring to fig. 10, the double-center supporting type grinding tool for the crosshead pin of the marine diesel engine is erected between two centers 7 of a grinding machine, and comprises two fixed disks 9, two gaskets 8, two transmission disks 6, a transmission rod 3, a transmission rod 2, a plurality of adjusting screws 10 and a special wrench 5.
Two fixed disks 9 respectively fixed mounting in the both ends of cross head round pin 4, two gaskets 8 are arranged in respectively the clamp between the both ends face of fixed disk 9 and cross head round pin 4. The two transmission discs 6 are respectively sleeved at the outer ends of the two fixed discs 9 and are fixedly connected to the fixed discs 9 through the adjusting screws 10. The special spanner 5 is used to operate the adjusting screw 10. The center of the driving disk 6 is provided with a center hole 62, and referring to fig. 6, two centers 7 of the grinding machine are respectively pressed against the center holes 62 of the two driving disks 6, thereby erecting the cross pin 4. The transmission rod 3 is radially connected to the outer circle of the fixed disk 9 through threads, and the transmission rod 2 is axially fixed to the outer edge of the machine tool chuck 1 of the grinding machine through bolts and is in contact with the outer end of the transmission rod 3. The machine tool chuck 1 is used for shifting the transmission rod 3 through the transmission rod 2 in a rotating motion of a machine tool spindle, further driving the fixed disc 9 and the crosshead pin 4 to rotate around the axes of two centers 7 of the grinding machine, then finishing grinding of the excircle of the crosshead pin 4 through the back and forth movement of a grinding wheel, measuring the jumping of the crosshead pin 4 in machining, and if the jumping is large and the grinding precision requirement cannot be met, adjusting the adjusting screw 10 through the special wrench 5 to adjust the fitting degree of the transmission disc 6 and the centers 7, so that the jumping and the like of the crosshead pin 4 meet the precision requirement.
Referring to fig. 3 and 4, the fixing plate 9 is a stepped cylinder and includes a cylindrical portion 91 and a threaded portion 92. The threaded portion 92 is coupled to the central threaded hole 41 of the cross pin 4; the cylindrical portion 91 is provided with an axial groove 93 on the outer circumference, and a threaded hole 94 for connecting and mounting the transmission rod 3 is provided along the radial direction. The number of the grooves 93 is four, and the grooves are uniformly distributed on the periphery of the cylindrical portion 91 of the fixed disk 9.
Referring to fig. 5 and 6, the driving plate 6 is a circular basin-shaped member, the inner cavity 61 of the driving plate is sleeved on the periphery of the cylindrical portion 91 of the fixing plate 9, the outer peripheral wall of the inner cavity 61 is provided with radial threaded through holes 63, the number of the threaded through holes 63 is four, the threaded through holes 63 are uniformly distributed on the periphery of the driving plate 6, and the positions of the threaded through holes correspond to the grooves 93 of the fixing plate 9.
The number of the adjusting screws 10 is four, and referring to fig. 8 and 9, the adjusting screws 10 include a square head portion 101, an adjusting thread portion 102, and a positioning block 103, which are connected in sequence. The square head 101 is used for the operation of the special wrench 5 to rotate the adjusting screw 10, the adjusting screw portion 102 is screwed into the screw through hole 63 of the driving disc 6, and the positioning block 103 is slidingly inserted into the groove 93 on the outer circle of the fixed disc 9, thereby fixedly connecting the driving disc 6 and the fixed disc 9.
Referring to fig. 7, one end of the driving rod 3 is provided with a connecting screw 31 connected with the screw hole 94 of the fixed disk 9.
The fixed disc 9, the transmission disc 6, the transmission rod 3 and the transmission rod 2 can be manufactured according to cross head pins 4 of different machine types so as to achieve the best grinding effect.
The external grinding operation of the crosshead pin of the marine diesel engine by adopting the grinding tool comprises the following steps, please refer to fig. 10:
1) fixing discs 9 are arranged on two end faces of the crosshead pin 4;
2) the transmission disc 6 is arranged on the fixed disc 9 by an adjusting screw 10;
3) installing a driving rod 2 on a machine tool chuck 1 through threads;
4) the transmission rod 3 is arranged on the fixed disc 9 through threads;
5) the center 7 is tightly propped against a transmission disc 6 arranged on the end face of the crosshead pin 4;
6) and opening the main shaft, and grinding the excircle through the grinding wheel to finish the operation.
The utility model can meet the grinding requirements of cross head pins of different models through a certain combination, simultaneously saves the auxiliary time of repeatedly adjusting the bracket in the traditional supporting and grinding mode, greatly improves the working efficiency, has simpler and more convenient field actual operation, effectively reduces the labor intensity, and reduces the cost while ensuring the personal health of an operator.
The above embodiments are not intended to limit the scope of the present invention, and the claimed invention is not limited to the above embodiments, but also includes other obvious variations and modifications, and all equivalent variations and modifications made according to the spirit of the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides a marine diesel engine cross head is two summit supporting formula grinding frock for round pin, erects between two summit of grinding machine, its characterized in that: the double-center supporting type grinding tool comprises two fixed discs, two transmission discs, a transmission rod and a plurality of adjusting screws; the two fixing discs are respectively and fixedly connected into central threaded holes at two ends of the cross head pin, the two transmission discs are respectively sleeved at the outer ends of the two fixing discs and are fixedly connected onto the fixing discs through the adjusting screws, a center hole is formed in the center of each transmission disc, two centers of the grinding machine are respectively tightly propped into the center holes of the two transmission discs, the transmission rod is radially connected onto the outer circle of the fixing disc through threads, the transmission rod is axially fixed at the outer edge of a machine tool chuck of the grinding machine and is in contact with the outer end part of the transmission rod, the rotary machine tool chuck stirs the transmission rod through the transmission rod, and further the fixing discs and the cross head pin are driven to rotate around the axes of the two centers of the grinding machine, and the grinding of the outer circle of the pin is completed through the grinding wheel.
2. The marine diesel engine crosshead pin of claim 1 is with two apex support formula grinding frock characterized in that: the double-top supporting type grinding tool further comprises a gasket, and the gasket is clamped between the fixed disc and the end face of the crosshead pin.
3. The marine diesel engine crosshead pin of claim 1 is with two apex support formula grinding frock characterized in that: a special spanner for operating the adjusting screw is also included.
4. The marine diesel engine crosshead pin of claim 1 is with two apex support formula grinding frock characterized in that: the fixed disc is in a stepped cylindrical shape and comprises a cylindrical part and a threaded part, the threaded part is connected with a central threaded hole of the crosshead pin, a groove along the axial direction is formed in the outer circle of the cylindrical part, and a threaded hole used for connecting and installing the transmission rod is formed in the radial direction.
5. The marine diesel engine crosshead pin of claim 4 is with two apex support formula grinding frock characterized in that: and one end of the transmission rod is provided with a connecting thread connected with the threaded hole of the fixed disc.
6. The marine diesel engine crosshead pin of claim 4 is with two apex support formula grinding frock characterized in that: the transmission disc is a round basin-shaped component, the inner cavity of the transmission disc is sleeved on the periphery of the cylindrical part of the fixed disc, and a radial thread through hole is formed in the peripheral wall of the inner cavity.
7. The marine diesel engine crosshead pin of claim 6 is with two apex support formula grinding frock characterized in that: the adjusting screw comprises a square head part, an adjusting thread part and a positioning block, wherein the square head part, the adjusting thread part and the positioning block are sequentially connected, the square head part is used for rotating the adjusting screw, the adjusting thread part is screwed into the thread through hole of the transmission disc, and the positioning block is slidably embedded into a groove in the excircle of the fixed disc.
8. The marine diesel engine crosshead pin of claim 7 is with two apex support formula grinding frock characterized in that: the number of the adjusting screws is four, the number of the thread through holes of the transmission disc is four, the thread through holes are uniformly distributed on the periphery of the transmission disc, and the number of the grooves of the fixing disc is four, and the grooves are uniformly distributed on the periphery of the cylindrical part of the fixing disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121878884.2U CN216126917U (en) | 2021-08-12 | 2021-08-12 | Double-top supporting type grinding tool for crosshead pin of marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121878884.2U CN216126917U (en) | 2021-08-12 | 2021-08-12 | Double-top supporting type grinding tool for crosshead pin of marine diesel engine |
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| Publication Number | Publication Date |
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| CN216126917U true CN216126917U (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121878884.2U Active CN216126917U (en) | 2021-08-12 | 2021-08-12 | Double-top supporting type grinding tool for crosshead pin of marine diesel engine |
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| CN (1) | CN216126917U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115156855A (en) * | 2022-07-28 | 2022-10-11 | 大连船用柴油机有限公司 | Method for machining outer circle of crosshead of marine diesel engine |
| CN115284171A (en) * | 2022-07-05 | 2022-11-04 | 上海中船三井造船柴油机有限公司 | Crosshead pin grinding device and method adopting adjustable center |
-
2021
- 2021-08-12 CN CN202121878884.2U patent/CN216126917U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115284171A (en) * | 2022-07-05 | 2022-11-04 | 上海中船三井造船柴油机有限公司 | Crosshead pin grinding device and method adopting adjustable center |
| CN115284171B (en) * | 2022-07-05 | 2023-10-10 | 上海中船三井造船柴油机有限公司 | Cross head pin grinding device and method adopting adjustable center |
| CN115156855A (en) * | 2022-07-28 | 2022-10-11 | 大连船用柴油机有限公司 | Method for machining outer circle of crosshead of marine diesel engine |
| CN115156855B (en) * | 2022-07-28 | 2023-11-17 | 大连船用柴油机有限公司 | Machining method for cross head excircle of marine diesel engine |
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