CN109093558A - The top bearing shell extracting tool and method for dismounting of diesel engine main bearing - Google Patents
The top bearing shell extracting tool and method for dismounting of diesel engine main bearing Download PDFInfo
- Publication number
- CN109093558A CN109093558A CN201811212732.1A CN201811212732A CN109093558A CN 109093558 A CN109093558 A CN 109093558A CN 201811212732 A CN201811212732 A CN 201811212732A CN 109093558 A CN109093558 A CN 109093558A
- Authority
- CN
- China
- Prior art keywords
- guide plate
- bearing shell
- top bearing
- crankshaft
- arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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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
- B25B27/06—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 inserting or withdrawing sleeves or bearing races
Abstract
The invention discloses a kind of top bearing shell extracting tools of diesel engine main bearing, and including arc-shaped guide plate and handle, the thickness of guide plate is less than the thickness of top bearing shell, and arc-shaped arc length is less than the semicircle arc length of place circle；Horizontal grip support block is fixed on the outer peripheral surface in the middle part of guide plate, and close to one end of guide plate, the other end of guide plate is equipped with positioning screw screw hole.Handle one end is fixedly connected with grip support block by the way that screw thread is vertical, and passes through nut locking.The method of the present invention includes the following steps: 1) assemble guide plate, 2) guide plate is located on crankshaft journal lower part, 3) turning crankshaft ejects top bearing shell, 4) rotating backward crankshaft takes out guide plate.The present invention dexterously releases the top bearing shell being clipped between crankshaft journal and base bearing using the rotation on short arc side, improves the removal efficiency of top bearing shell, solves the problems, such as top bearing shell disassembly without damaging tiling.
Description
Technical field
The present invention relates to a kind of repair demolition tools of diesel engine bush, in particular to a kind of for taking out diesel engine main shaft
The tool and method for holding top bearing shell, belong to engine maintenance technical field.
Background technique
The crankshaft of medium seed diesel engine is mostly that solid forging is process, and is supported on machine by several grades of spaced base bearings
On frame, base bearing uses the structure of upper and lower bearing shell split, and upper and lower bearing shell is the compound of three-layer metal, and Inner arc surface is coated with
Wearing layer.In the process of running, lubricating oil forms carrying oil film to medium seed diesel engine between crankshaft and bearing shell, makes crankshaft in operation process
In be constantly in carrying oil film supporting suspended state, thus be able to protection crankshaft journal.The surface roughness of bearing shell working face
It is 0.4 grade or more, working face is very smooth.Base bearing needs to remove upper and lower bearing shell when repairing, and lower bearing can be with main beating cap
It removes, is easier together；And top bearing shell 10 is clipped in as shown in Figure 1 between crankshaft diameter 20 and main bearing seat 30, disassembly is difficult.
Especially in the disassembly process of top bearing shell 10, working face cannot have any damage, otherwise will result directly in crankshaft diameter
Carrying oil film can not be established.There is dry friction, very short time when lacking carrying oil film supporting between bearing shell in crankshaft diameter
Scuffing of cylinder bore, the major accidents such as locking will be caused.Simultaneously because top bearing shell itself has constant weight, and its disassembling section space pole
Small (especially two grades of head and the tail), in the disassembly process of top bearing shell, the prior art is difficult to ensure that the tiling of top bearing shell is injury-free,
And it is very low to dismantle bothersome laborious efficiency.
Summary of the invention
The object of the present invention is to provide a kind of structures simply, dismounting is efficiently convenient, and will not damage top bearing shell working face
The top bearing shell extracting tool and method of diesel engine main bearing.
The present invention is achieved by the following technical programs:
A kind of top bearing shell extracting tool of diesel engine main bearing, including guide plate and handle, the guide plate are arc-shaped, guiding
The thickness of plate is less than the thickness of top bearing shell, and arc-shaped arc length is less than the semicircle arc length of place circle；Horizontal grip support block is solid
It is scheduled on the outer peripheral surface in the middle part of guide plate, and close to one end of guide plate, the other end of guide plate is equipped with positioning screw screw hole；Hand
Handle one end is fixedly connected with grip support block by the way that screw thread is vertical, and passes through nut locking.
The purpose of the present invention further realizes by the following technical programs:
Further, the difference of the thickness H2 of the thickness H1 and guide plate of the top bearing shell: H1-H2=0.2mm~0.3mm.
Further, inner arc surface central angle alpha=88 °~92 ° of the guide plate, grip support block center line is by circular arc
The guide plate of shape be divided into long arc shape while and two parts when short arc, the long arc shape while central angle alpha 1 and short arc while the center of circle
The ratio between angle α 2: α 1/ α 2=1.9~2.1.
Further, grip support block both ends are respectively equipped with the first threaded hole for extending through the handle supporting block, handle branch
Axis second threaded hole vertical with screw thread axially bored line is equipped in the middle part of bracer.
Further, handle one end end is the end of thread, and the end of thread is screwed into first threaded hole of supporting block one end,
The handle other end is folded upward at into U-shaped after being inclined outwardly again.
A kind of application method of the top bearing shell extracting tool of diesel engine main bearing, comprising the following steps:
1) preparation process
The lower ball cover for being fixed on diesel engine main bearing lower part is first removed, the positioning and locking piece in bearing cap is then removed and takes out
Lower bearing, so that the lower half of crankshaft journal is exposed；
2) guide plate is assembled
The end of thread of handle is screwed into grip support block in first threaded hole of one end of operator, and uses nut locking
Handle；
3) guide plate is located on crankshaft journal lower part
By the lubrication hole of the positioning screw screw hole alignment crankshaft journal lower part of the guide plate other end, then positioning screw is screwed into and is led
Into the positioning screw screw hole of plate one end, and inject positioning screw lower end end in the lubrication hole of crankshaft journal, by guide plate
It is located on crankshaft journal lower part；
4) turning crankshaft ejects top bearing shell
According to the short arc edge direction turning crankshaft of guide plate, guide plate is rotated with it, and in the process, operator holds handle
Rotated with guide plate, the short arc side end head of guide plate is first resisted against on the side of top bearing shell, then push top bearing shell with it is static
Main bearing seat produce relative rotation, until grip support block is resisted against main bearing seat edge, top bearing shell has been partially disengaged at this time
Main bearing seat, crankshaft stop operating, so that it may pull out top bearing shell；The short arc side of guide plate has rotated into crankshaft journal and master at this time
Between the arcwall face of bearing block；
5) it rotates backward crankshaft and takes out guide plate
According to the long arc shape edge direction counterrotating crankshafts of guide plate, until the short arc side of guide plate completely disengages crankshaft journal, so
After back-out positioning screw, so that positioning screw lower end end is detached from the lubrication hole of crankshaft journal, so that it may take out guide plate, and will positioning
Screw is screwed into the second threaded hole in the middle part of grip support block, has kept properly guide plate, in case next time uses.
Extracting tool structure of the invention is simple, application method high-efficient simple, and the central angle alpha of arc-shaped guide plate is half
Round 1/2 or so, and by grip support block by arc-shaped guide plate be divided into long arc shape while and two parts when short arc, ingeniously
Wonderfully using the lubrication hole of crankshaft journal as the location hole of the positioning screw of guide plate, folder is released by the rotation on short arc side
Top bearing shell between crankshaft journal and base bearing, the tiling of top bearing shell are not damaged, and improve the disassembly effect of top bearing shell
Rate solves the problems, such as top bearing shell disassembly without damaging tiling.
The advantages and features of the present invention will be illustrated and explained by the non-limitative illustration of following preferred embodiment, this
A little embodiments only provide as an example referring to attached drawing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of guide plate of the present invention；
Fig. 2 is the right view of Fig. 1；
Fig. 3 is the bottom view of Fig. 2；
Fig. 4 is the schematic diagram that guide plate is mounted on crankshaft journal；
Fig. 5 is the schematic diagram that guide plate releases top bearing shell.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in FIG. 1 to 3, the present embodiment includes guide plate 1 and handle 2, and guide plate 1 is arc-shaped, the thickness of guide plate 1
Degree is less than the thickness of top bearing shell 10, and the difference of the thickness H2 of the thickness H1 and guide plate 1 of top bearing shell 10: H1-H2=0.22mm is convenient for
Guide plate 1 rotates into release top bearing shell 10 between crankshaft diameter 20 and main bearing seat 30.
The arc-shaped arc length of guide plate 1 is less than the semicircle arc length of place circle, that is, exposes half of crankshaft after removing lower bearing
The circular arc arc length of the diameter of axle 20 rotates on the surface of half of crankshaft diameter 20 convenient for guide plate 1 and releases top bearing shell 10.Horizontal hand
Handle supporting block 11 is weldingly fixed on the outer peripheral surface at 1 middle part of guide plate, and close to one end of guide plate 1, the other end of guide plate 1
Equipped with positioning screw screw hole 12, convenient for guide plate 1 is located in crankshaft diameter 20 by positioning screw 3.Grip support block 11
Both ends are respectively equipped with the first threaded hole 111 for extending through the handle supporting block 11, are equipped with axis and threaded hole in the middle part of grip support block 11
The second vertical threaded hole 112 of 111 axis, when right-hand rotation operates, as shown in Fig. 2, the end of thread of handle 2 is screwed into grip support block 11
Left end is in the first threaded hole 111 of proximal operator；When turning left to operate, the end of thread of handle 2 is screwed into 11 right end of grip support block
The first threaded hole 111 by proximal operator in, operation direction it is unrestricted.Handle 2 is fixed on grip support block 11, and is led to
The locking of nut 4 is crossed, prevents handle 2 from falling off；The U-shaped that 2 other end of handle is folded upward at into again convenient for hand-held after being inclined outwardly.
Inner arc surface central angle alpha=90 ° of the present embodiment guide plate 1, less than having dismantled main beating cap and lower bearing and
Expose 20 corresponding 180 ° of half of crankshaft journal of central angle, convenient for guide plate 1 inner arc surface around crankshaft journal 20 axis
Heart line rotates to remove top bearing shell 10.Arc-shaped guide plate 1 is divided into long arc shape side 13 and short by 11 center line of grip support block
14 two parts of arc-shaped side, the long arc shape of the present embodiment in 13 central angle alpha 1 and short arc 14 the ratio between central angle alpha 2: 1/ α 2 of α
=2.0, such structure makes short arc side 14 have certain rotation distance on crankshaft journal 20, is conducive to guide plate 1
Short arc side 14 pushes top bearing shell 10, so that it is rotated out 30 top of main bearing seat, consequently facilitating removing top bearing shell 10.
A method of using the top bearing shell extracting tool of diesel engine main bearing, comprising the following steps:
Fig. 4 and the present embodiment shown in fig. 5 are operation of turning right, and left-hand rotation operation can also be used.
1) preparation process
The lower ball cover for being fixed on diesel engine main bearing lower part is first removed, the positioning and locking piece in bearing cap is then removed and takes out
Lower bearing, so that the lower half of crankshaft journal 20 is exposed.
2) guide plate 1 is assembled
The end of thread of handle 2 is screwed into grip support block 11 in first threaded hole 111 at the end of operator, and uses nut
4 lock handles 2, prevent handle 2 from falling off.
3) guide plate 1 is located on 20 lower part of crankshaft journal
The positioning screw screw hole 12 of 1 other end of guide plate is aligned to the lubrication hole 201 of 20 lower part of crankshaft journal, then will position spiral shell
Nail 3 is screwed into the positioning screw screw hole 12 of 1 one end of guide plate, and makes the cunning of 3 lower end end of positioning screw reeve crankshaft journal 20
In oilhole 201, guide plate 1 is located on 20 lower part of crankshaft journal.
4) turning crankshaft ejects top bearing shell 10
According to the 14 direction turning crankshaft of short arc side of guide plate 1, guide plate 1 is rotated with it, and in the process, operator is hand-held
Handle 2 is rotated with guide plate 1, and 14 end of short arc side of guide plate 1 is first resisted against on the side of top bearing shell 10, is then pushed
Bearing shell 10 produces relative rotation with static main bearing seat 30, until grip support block 11 is resisted against 30 edge of main bearing seat, this
When top bearing shell 10 have nearly 1/6 and be partially disengaged main bearing seat 30, crankshaft stops operating, and can pull out top bearing shell 10；It leads at this time
It has been rotated between crankshaft journal 20 and the arcwall face of main bearing seat 30 to the short arc side 14 of plate 1.
4) it rotates backward crankshaft and takes out guide plate 1
According to the 13 direction counterrotating crankshafts of long arc shape side of guide plate 1, until the short arc side 14 of guide plate 1 completely disengages crankshaft axis
Then neck 20 back-outs positioning screw 3, so that 3 lower end end of positioning screw is detached from the lubrication hole 201 of crankshaft journal 20, so that it may take out
Guide plate 1, and positioning screw 3 is screwed into second threaded hole 112 at 11 middle part of grip support block, prevent positioning screw 3 from losing.
Guide plate 1 is kept properly, in case next time uses.
In addition to the implementation, the present invention can also have other embodiments, all to use equivalent substitution or equivalent transformation shape
At technical solution, be all fallen within the protection domain of application claims.
Claims (6)
1. a kind of top bearing shell extracting tool of diesel engine main bearing, it is characterised in that: including guide plate and handle, the guide plate
It is arc-shaped, the thickness of guide plate is less than the thickness of top bearing shell, and arc-shaped arc length is less than the semicircle arc length of place circle；Horizontal
Grip support block is fixed on the outer peripheral surface of guide plate, and close to one end of guide plate, the other end of guide plate is equipped with positioning spiral shell
Oncomelania hole；Handle one end is fixedly connected with grip support block by the way that screw thread is vertical, and passes through nut locking.
2. the top bearing shell extracting tool of diesel engine main bearing as described in claim 1, it is characterised in that: the thickness of the top bearing shell
Spend the difference of the thickness H2 of H1 and guide plate: H1-H2=0.2mm~0.3mm.
3. the top bearing shell extracting tool of diesel engine main bearing as described in claim 1, it is characterised in that: the guide plate it is interior
Arc surface central angle alpha=88 °~92 °, grip support block center line by arc-shaped guide plate be divided into long arc shape while and when short arc
Two parts, the long arc shape while central angle alpha 1 and the ratio between the central angle alpha 2 when short arc: 1/ α 2=1.9~2.1 of α.
4. the top bearing shell extracting tool of diesel engine main bearing as described in claim 1, it is characterised in that: the grip support block
Both ends are respectively equipped with perforative the first threaded hole of grip support block, and it is vertical with screw thread axially bored line to be equipped with axis in the middle part of grip support block
The second threaded hole.
5. the top bearing shell extracting tool of diesel engine main bearing as described in claim 1, it is characterised in that: handle one end end is
The end of thread, the end of thread are screwed into first threaded hole of supporting block one end, and the handle other end is folded upward at again after being inclined outwardly
At U-shaped.
6. a kind of method of the top bearing shell extracting tool using diesel engine main bearing as described in claim 1, it is characterised in that:
The following steps are included:
1) preparation process
The lower ball cover for being fixed on diesel engine main bearing lower part is first removed, the positioning and locking piece in bearing cap is then removed and takes out
Lower bearing, so that the lower half of crankshaft journal is exposed；
Assemble guide plate
The end of thread of handle is screwed into grip support block in first threaded hole of one end of operator, and uses nut locking
Handle；
Guide plate is located on crankshaft journal lower part
By the lubrication hole of the positioning screw screw hole alignment crankshaft journal lower part of the other end of guide plate, then positioning screw is screwed into
It in the positioning screw screw hole of guide plate one end, and injects positioning screw lower end end in the lubrication hole of crankshaft journal, will be oriented to
Plate is located on crankshaft journal lower part；
4) turning crankshaft ejects top bearing shell
According to the short arc edge direction turning crankshaft of guide plate, guide plate is rotated with it, and in the process, operator holds handle
Rotated with guide plate, the short arc side end head of guide plate is first resisted against on the side of top bearing shell, then push top bearing shell with it is static
Main bearing seat produce relative rotation, until grip support block is resisted against main bearing seat edge, top bearing shell has been partially disengaged at this time
Main bearing seat, crankshaft stop operating, and can pull out top bearing shell；The short arc side of guide plate has rotated into crankshaft journal and master at this time
Between the arcwall face of bearing block；
5) it rotates backward crankshaft and takes out guide plate
According to the long arc shape edge direction counterrotating crankshafts of guide plate, until the short arc side of guide plate completely disengages crankshaft journal, so
After back-out positioning screw, so that positioning screw lower end end is detached from the lubrication hole of crankshaft journal, so that it may take out guide plate, and will positioning
Screw is screwed into the second threaded hole in the middle part of grip support block, has kept properly guide plate, in case next time uses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212732.1A CN109093558A (en) | 2018-10-18 | 2018-10-18 | The top bearing shell extracting tool and method for dismounting of diesel engine main bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811212732.1A CN109093558A (en) | 2018-10-18 | 2018-10-18 | The top bearing shell extracting tool and method for dismounting of diesel engine main bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109093558A true CN109093558A (en) | 2018-12-28 |
Family
ID=64868941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811212732.1A Pending CN109093558A (en) | 2018-10-18 | 2018-10-18 | The top bearing shell extracting tool and method for dismounting of diesel engine main bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109093558A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434696A (en) * | 2019-08-22 | 2019-11-12 | 桂林福达曲轴有限公司 | A kind of crankshaft journal surface percent ripple milling tool and its application method |
| CN112025602A (en) * | 2020-06-28 | 2020-12-04 | 中船动力有限公司 | Tool for installing main bearing bush of diesel engine base |
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| WO2013150017A1 (en) * | 2012-04-04 | 2013-10-10 | Nuovo Pignone Srl | Maintenance tool and method for a split friction bearing assembly and rotary machine using the same |
| EP3228891A1 (en) * | 2016-04-06 | 2017-10-11 | MAN Truck & Bus AG | Device and method for resetting a bearing shell which has slid out of a recess on a shaft |
| CN107443300A (en) * | 2017-09-01 | 2017-12-08 | 河南柴油机重工有限责任公司 | A kind of use for diesel engine crank spindle watt extracting tool and method for dismounting |
| CN206998764U (en) * | 2017-05-17 | 2018-02-13 | 宝钢集团新疆八一钢铁有限公司 | GKIC diesel engine of locomotive main bearing shell withdrawing devices |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201320745Y (en) * | 2008-12-05 | 2009-10-07 | 南车洛阳机车有限公司 | Axle suspension bush removing device |
| WO2013150017A1 (en) * | 2012-04-04 | 2013-10-10 | Nuovo Pignone Srl | Maintenance tool and method for a split friction bearing assembly and rotary machine using the same |
| EP3228891A1 (en) * | 2016-04-06 | 2017-10-11 | MAN Truck & Bus AG | Device and method for resetting a bearing shell which has slid out of a recess on a shaft |
| CN206998764U (en) * | 2017-05-17 | 2018-02-13 | 宝钢集团新疆八一钢铁有限公司 | GKIC diesel engine of locomotive main bearing shell withdrawing devices |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434696A (en) * | 2019-08-22 | 2019-11-12 | 桂林福达曲轴有限公司 | A kind of crankshaft journal surface percent ripple milling tool and its application method |
| CN112025602A (en) * | 2020-06-28 | 2020-12-04 | 中船动力有限公司 | Tool for installing main bearing bush of diesel engine base |
| CN112025602B (en) * | 2020-06-28 | 2024-01-02 | 中船动力有限公司 | Mounting tool for main shaft bush of diesel engine base |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181228 |
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| RJ01 | Rejection of invention patent application after publication |