CN209394595U - A kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill - Google Patents
A kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill Download PDFInfo
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- CN209394595U CN209394595U CN201822167600.3U CN201822167600U CN209394595U CN 209394595 U CN209394595 U CN 209394595U CN 201822167600 U CN201822167600 U CN 201822167600U CN 209394595 U CN209394595 U CN 209394595U
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Abstract
The utility model belongs to dismantling device field, more particularly to a kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill, the dismantling device for the double oil cylinder pin shafts of Vertical Mill includes: bolt, bolt special, specialized nut and spanner, the pressing plate is equipped with through-hole, bolt is installed on the through-hole, the bolt can be with oil cylinder, lower shake-changing arm or bracket connection, the specialized nut covers in pressing plate, and it is equipped with seam allowance, the seam allowance blocks the pressing plate, the spanner is connect by bolt A with specialized nut, the bolt special and specialized nut are by being threadedly engaged installation.It is simple that the utility model provides a kind of structure, easy to operate, safe and reliable, and completion that can be good and fast dismounts work, and avoids the injury to pin shaft and bearing, while easy to operate, improves the dismantling device for the double oil cylinder pin shafts of Vertical Mill of production efficiency.
Description
Technical field
The utility model belongs to dismantling device field more particularly to a kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill.
Background technique
The prior art and defect:
Vertical Mill is widely used in raw grinding, pulverized coal preparation, the production of the powder body materials such as cement grinding and slag milling.
Generally using double oil cylinder pressurizations, double oil cylinders are connect by pin shaft with lower shake-changing arm large-scale Vertical Mill.Usually in-site installation pin shaft etc., it is existing
Hammering pin shaft and bearing are generallyd use when the operation of field to realize the installation and removal of itself and lower shake-changing arm and oil cylinder.Dismounting every time
All there is different degrees of damage to pin shaft and bearing, and exists and hit security risk that is empty and generating.
Solve the difficulty and meaning of above-mentioned technical problem:
Therefore, these problems are based on, it is simple to provide a kind of structure, and it is easy to operate, it is safe and reliable, it can be good and fast
Dismounting work is completed, and avoids the injury to pin shaft and bearing, while easy to operate, improves the double for Vertical Mill of production efficiency
The dismantling device of oil cylinder pin shaft has important practical significance.
Utility model content
The utility model aim is to solve technical problem present in well-known technique and simple, the behaviour that provides a kind of structure
Facilitate, safe and reliable, completion that can be good and fast dismounts work, and avoids the injury to pin shaft and bearing, simultaneously
It is easy to operate, improve the dismantling device for the double oil cylinder pin shafts of Vertical Mill of production efficiency.
The utility model is adopted the technical scheme that solve technical problem present in well-known technique:
A kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill, the dismantling device packet for the double oil cylinder pin shafts of Vertical Mill
Include: pressing plate, bolt, bolt special, specialized nut and spanner, the pressing plate are equipped with through-hole, are equipped with bolt on the through-hole,
The bolt can be connect with oil cylinder, lower shake-changing arm or bracket, and the specialized nut covers in pressing plate, and be equipped with seam allowance, described
Seam allowance blocks the pressing plate, and the spanner is connect by bolt A with specialized nut, and the bolt special and specialized nut pass through spiral shell
Line is coupled.
The utility model structure is simple, easy to operate, safe and reliable, and completion that can be good and fast dismounts work, and
The injury to pin shaft and bearing is avoided, while easy to operate, improves production efficiency.
The utility model can also use following technical scheme:
In the above-mentioned dismantling device for the double oil cylinder pin shafts of Vertical Mill, further, the specialized nut is in closely-pitched
Screw thread, the screw thread of the bolt special are fine thread, and the bolt special end is equipped with square toes.
When spanner rotates specialized nut, stepped up to prevent bolt special from rotating synchronously with tool, and realize bolt special
Axial movement.
In the above-mentioned dismantling device for the double oil cylinder pin shafts of Vertical Mill, further, the bolt special end is equipped with
Fixed plate is provided with threaded hole, the oil cylinder pin shaft and the bolt special in the fixed plate and is connected by the bolt B in threaded hole
It connecing, the pressing plate is connect by screw rod A with oil cylinder, it is cased with nut A on the screw rod A, when disassembly, the seam allowance of specialized nut
In the inside of pressing plate, when installation, the seam allowance of specialized nut is in the outside of pressing plate.
When disassembly, specialized nut is rotated by spanner, so that pin shaft moves axially, pin shaft and oil cylinder can be completed
Disassembly；When installation, specialized nut is rotated by spanner, the installation of pin shaft and oil cylinder can be completed.
It is further, described for the double oil cylinder pins of Vertical Mill in the above-mentioned dismantling device for the double oil cylinder pin shafts of Vertical Mill
The dismantling device of axis further includes bracket, and the end face of the bracket is connect by bolt E with pin shaft, and the bracket edge withstands on bearing
Outer ring.
By bolt E pin shaft, bearing, bracket, bolt special etc. are integrally formed.
In the above-mentioned dismantling device for the double oil cylinder pin shafts of Vertical Mill, further, set in the other side of the rocker arm
There is bracket, the carrier edge is fixed by bolt C and the lower shake-changing arm, the inside edge of the bracket and the lower shake-changing arm
Inside edge alignment.
The bracket is used to support the pin shaft and bearing after disassembly.
In the above-mentioned dismantling device for the double oil cylinder pin shafts of Vertical Mill, further, the bracket is equipped with lifting bolt,
The bracket end face is equipped with threaded hole.
There is lifting bolt for lifting by crane, and be equipped with threaded hole, bracket can be bolted with pressing plate.
In the above-mentioned dismantling device for the double oil cylinder pin shafts of Vertical Mill, further, when disassembly, the bolt E is passed through
Bolt special and bracket are fixed with the oil cylinder pin shaft, and the pressing plate is integrally connected by screw rod B and nut B with lower shake-changing arm, specially
With the seam allowance of nut in the inside of pressing plate, the bracket and the bracket are located at the two sides of lower shake-changing arm.
The oil cylinder pin shaft is connected as one by bolt E with bolt special and bracket, rotates specialized nut by spanner,
The disassembly of oil cylinder pin shaft and bearing can be realized.
In the above-mentioned dismantling device for the double oil cylinder pin shafts of Vertical Mill, further, when installation, the bracket is located at institute
The inside of bracket is stated, the bolt special passes through the bracket, and the oil cylinder pin shaft is connected by bolt F and bolt special and bracket
It is connected in one, the pressing plate is connect by bolt D with bracket, and the seam allowance of specialized nut is in the outside of pressing plate.
Specialized nut is rotated by spanner, the installation of pin shaft and lower shake-changing arm can be completed.
Adjustment seam allowance can realize removing and installing for pin shaft in the position of pressing plate, and rotary spanner realizes bolt special and pin shaft
Axial movement.
In conclusion the utility model has the advantages that:
The utility model by adopting the above technical scheme, can not only play the role of pin shaft and bearing removal and installation,
It is easy to operate, labor efficiency is improved, and prevent from generating damage to pin shaft and bearing, to prolong the service life, and improved vertical
The overhaul efficiency of mill.
Detailed description of the invention
The technical solution of the utility model is described in further detail below with reference to drawings and examples, still
It should be known that these attached drawings are designed for task of explanation, therefore not as the restriction of the scope of the utility model.In addition,
Unless otherwise indicated, these attached drawings are meant only to conceptually illustrate structure construction described herein, without to carry out to scale
It draws.
Fig. 1 is structural schematic diagram when dismantling oil cylinder；
Fig. 2 is structural schematic diagram when dismantling pin shaft and bearing under the first working condition；
Fig. 3 is structural schematic diagram when dismantling pin shaft and bearing under second of working condition；
Fig. 4 is structural schematic diagram when installing pin shaft and bearing under the first working condition；
Fig. 5 is structural schematic diagram when installing pin shaft and bearing under second of working condition；
Structural schematic diagram when Fig. 6 is installation oil cylinder earrings.
In figure:
1, oil cylinder；2, lower shake-changing arm；3, bearing；4, pin shaft；5, screw rod A；6, gasket A；7, nut A；8, dedicated spiral shell
It is female；9, bolt special；10, bolt A；11, gasket B；12, spanner；13, pressing plate；14, bolt B；15, gasket C；16, bracket；17,
Lifting bolt；18, bolt C；19, gasket D；20, bracket；21；Screw rod B；22, gasket E；23, nut B；24, gasket E；25, spiral shell
Bolt D；26, square toes；27, bolt E；28, bolt F；29, seam allowance.
Specific embodiment
Firstly, it is necessary to explanation, illustrate the utility model by by way of example below is used for the double oil of Vertical Mill
Specific structure, features and advantages of the dismantling device of cylinder pin shaft etc., however what all descriptions were intended merely to be illustrated, without
It is to be understood as forming any restrictions to the utility model.In addition, being described by each embodiment mentioned by this paper or hidden
Any single technical characteristic contained, or shown or implicit any single technical characteristic in the drawings, still can be at this
Continue any combination between a little technical characteristics (or its equivalent) or deletes, it may be not direct herein to obtain
More other embodiments of the utility model referred to.In addition, for the sake of simplifying drawing, same or like technical characteristic
It may only be indicated at one in the same figure.
It will be understood that when component ' attach ' to another component when it is said that, it can be directly connected to another component or
There may be intermediate members.On the contrary, when component " being directly connected to " being arrived another component when it is said that, then it represents that middle part is not present
Part.
Fig. 1 gives structural schematic diagram when disassembly oil cylinder, and by the way that Fig. 2 shows when disassembly pin shaft and bearing
Structural schematic diagram under the first working condition, and second of working condition when dismantling pin shaft and bearing is shown by Fig. 3
Under structural schematic diagram, and installation pin shaft and structural schematic diagram when bearing under the first working condition are shown by Fig. 4,
And structural schematic diagram when showing installation pin shaft and bearing by Fig. 5 under second of working condition, and shown by Fig. 6
Structural schematic diagram when installation oil cylinder earrings, below just Fig. 1 to Fig. 6 is combined to illustrate the utility model.
For the utility model content, feature and effect that can further appreciate that the utility model, the following examples are hereby given, and
It is described in detail with the accompanying drawings as follows:
A kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill, the dismantling device packet for the double oil cylinder pin shafts of Vertical Mill
Include: pressing plate 13, bolt, bolt special 9, specialized nut 8 and spanner 12, the pressing plate 13 are equipped with through-hole, pacify on the through-hole
Equipped with bolt, the bolt can be connect with oil cylinder 1, lower shake-changing arm 2 or bracket 20, and 8 sets of the specialized nut is in pressing plate 13
In, and it is equipped with seam allowance 29, the seam allowance 29 blocks the pressing plate 13, and the spanner 12 is connected by bolt A10 and specialized nut 8
It connects, the bolt special 9 is with specialized nut 8 by being threadedly engaged installation.
The utility model structure is simple, easy to operate, safe and reliable, and completion that can be good and fast dismounts work, and
The injury to pin shaft 4 and bearing 3 is avoided, while easy to operate, improves production efficiency.
It should be pointed out that the specialized nut 8 is closely-pitched internal screw thread, the screw thread of the bolt special 9 is fine thread,
9 end of bolt special is equipped with square toes 26.
When spanner 12 rotates specialized nut 8, stepped up to prevent bolt special 9 from rotating synchronously with tool, and realize dedicated
Screw rod 9 moves axially.
It should be pointed out that 9 end of bolt special is equipped with fixed plate, it is provided with threaded hole in the fixed plate, it is described
Oil cylinder pin shaft 4 is connect with the bolt special 9 by the bolt B 14 in threaded hole, and the pressing plate 13 passes through screw rod A5 and oil cylinder
Earrings 1 connects, and is cased with nut A7 on the screw rod A5, and when disassembly, the seam allowance 29 of specialized nut 8 is in the inside of pressing plate 13, installation
When, the seam allowance 29 of specialized nut 8 is in the outside of pressing plate 13.
When disassembly, specialized nut 8 is rotated by spanner 12, so that pin shaft 4 moves axially, pin shaft 4 and oil cylinder can be completed
The disassembly of earrings 1；When installation, specialized nut 8 is rotated by spanner 12, the installation of pin shaft 4 Yu oil cylinder 1 can be completed.
For further, it can also consider in the present invention, the dismounting for the double oil cylinder pin shafts 4 of Vertical Mill
Tool further includes bracket 20, and the end face of the bracket 20 is connect by bolt E27 with pin shaft 4, and 20 edge of bracket withstands on axis
Hold 3 outer ring.
By bolt E27 pin shaft 4, bearing 3, bracket 20, bolt special 9 etc. are integrally formed.
It for further, can also consider in the present invention, be equipped with bracket 16, institute in the other side of the rocker arm
It is fixed by bolt C18 and the lower shake-changing arm 2 to state 16 edge of bracket, the inside edge of the bracket 16 and the lower shake-changing arm 2
Inside edge alignment.
The bracket 16 is used to support the pin shaft 4 and bearing 3 after disassembly.
It should be pointed out that the bracket 16 is equipped with lifting bolt 17,16 end face of bracket is equipped with threaded hole.
There is lifting bolt 17 for lifting by crane, and be equipped with threaded hole, bracket 16 can be bolted with pressing plate 13.
It should be pointed out that the bolt E27 passes through bolt special 9 and bracket 20 and the oil cylinder pin shaft 4 is solid when disassembly
Fixed, the pressing plate 13 is integrally connected by screw rod B21 and nut B23 with lower shake-changing arm 2, and the seam allowance 29 of specialized nut 8 is in pressing plate 13
Inside, the bracket 20 and the bracket 16 are located at the two sides of lower shake-changing arm 2.
The oil cylinder pin shaft 4 is connected as one by bolt E27 with bolt special 9 and bracket 20, is rotated by spanner 12
The disassembly of oil cylinder pin shaft 4 and bearing 3 can be realized in specialized nut 8.
It should be pointed out that the bracket 20 is located at the inside of the bracket 16, and the bolt special 9 passes through when installation
The bracket 16, the oil cylinder pin shaft 4 are connected as one by bolt F28 with bolt special 9 and bracket 20, and the pressing plate 13 is logical
It crosses bolt D25 to connect with bracket 16, the seam allowance 29 of specialized nut 8 is in the outside of pressing plate 13.
Specialized nut 8 is rotated by spanner 12, the installation of pin shaft 4 Yu lower shake-changing arm 2 can be completed.
Removing and installing for pin shaft 4 can be realized in the position of pressing plate 13 by adjusting seam allowance 29, and rotary spanner 12 realizes dedicated spiral shell
The axial movement of bar 9 and pin shaft 4.
As an example, in the present invention, oil cylinder pin shaft 4 is connect by four bolts with bolt special 9, and pressing plate 13 is logical
Screw rod A5 is crossed to connect with oil cylinder 1.The seam allowance 29 of specialized nut 8 rotates dedicated spiral shell in the left side of pressing plate 13, by spanner 12
Mother 8, while being stepped up the square toes 26 of bolt special 9 with tool, so that pin shaft 4 moves axially, pin shaft 4 and oil cylinder can be completed
The disassembly of earrings 1；When installation, the seam allowance 29 of specialized nut 8 rotates specialized nut 8 by spanner 12, i.e., on the right side of pressing plate 13
The installation of achievable pin shaft 4 and oil cylinder 1.
Oil cylinder pin shaft 4 is connected as one by bolt with bolt special 9, bracket 20, bearing 3, pressing plate 13 pass through screw rod,
Nut is connected as one with lower shake-changing arm 2, and the seam allowance 29 of specialized nut 8 rotates dedicated spiral shell by spanner 12 in the left side of pressing plate 13
Mother 8, can be realized the disassembly of oil cylinder pin shaft 4 and bearing 3.It is equipped with bracket 16 in the other side of rocker arm, after supporting disassembly
Pin shaft 4 and bearing 3.When installation, pressing plate 13 is connect by bolt with bracket 16, the seam allowance 29 of specialized nut 8 is in pressing plate 13
Right side rotates specialized nut 8 by spanner 12, the installation of pin shaft 4 and bearing 3 and lower shake-changing arm 2 can be completed；
It can play the role of disassembly pin shaft 4 and bearing 3 improving labor efficiency with the above design, reduce labour
Intensity, it is easy to operate, it prevents from generating damage to pin shaft 4 and bearing 3, to prolong the service life.
As an example, in the present invention, following steps are taken to implement:
One, disassembly process:
Firstly the need of disassembly oil cylinder, bolt special 9 is connect by bolt B 14, gasket C15 with pin shaft 4, dedicated spiral shell
Mother 8 is screwed on bolt special 9, and the seam allowance 29 of specialized nut is in the left side of pressing plate 13；Screw rod A5 is screwed into oil cylinder 1, pressing plate
13 are connected by screw rod A5 and gasket A6, nut A7 with oil cylinder, spanner 12 by bolt A10, gasket B11 with it is dedicated
Nut 8 is connected as one；Step up the side of 9 end of bolt special with tool so that specialized nut 8 is rotated by rotating spanner 12
Head prevents from rotating, and bolt special 9 moves axially, and the disassembly of pin shaft and oil cylinder can be completed.
Secondly pin shaft and bearing are dismantled from lower shake-changing arm.The left side of lower shake-changing arm uses bolt C18, gasket D19 by bracket
16 put together on lower shake-changing arm, it is therefore an objective to pin shaft and bearing after holding disassembly；Lifting bolt 17 there are two being set on bracket 16, just
In the lifting of pin shaft；The right end of pin shaft is connected bracket 20 and bolt special 9, pin shaft and bearing etc. by bolt E27 and gasket
It is integrated, wherein bracket 20 withstands on the outer ring of bearing；Pressing plate 13 is connected as one by screw rod B21, gasket E22 and nut B23,
The seam allowance 29 of specialized nut is connected as one by gasket B11, bolt A10 and specialized nut 8 in the left side of pressing plate 13, spanner 12
Body；By rotating spanner 12, so that 8 rotation of specialized nut rotation, is prevented spin-ended with the square toes that tool steps up 9 end of bolt special
Turn, bolt special 9 moves axially；It, can be by tightening nut B23 transverse shifting pressing plate 13 due to the limited length of bolt special
After certain distance, to complete the disassembly of pin shaft and bearing；It has dismantled rear pin shaft and bearing is fallen in bracket 16, unscrewed bolt C18,
It is removed by lifting bolt 17.
Two, installation process:
A bearing is mounted in lower shake-changing arm first, another bearing is on pin shaft and is put into togerther in bracket 16,
Bracket 16 is fixed on lower shake-changing arm using bolt C18, gasket D19；Pressing plate 13 is connected by gasket E24, bolt D25 and bracket 16
It connects；Bolt special 9 and bracket 20 are put together on pin shaft 4 by bolt F28, gasket, and the seam allowance 29 of specialized nut 8 is in pressing plate 13
Right side；It prevents from rotating with the square toes that tool steps up 9 end of bolt special so that specialized nut 8 is rotated by rotating spanner 12,
Bolt special 9 moves axially, and the installation of pin shaft and bearing can be completed.
Secondly installation oil cylinder earrings, bolt special 9 are connect by bolt B 14, gasket C15 with pin shaft 4, and screw rod A5 is screwed into oil
In cylinder earrings 1, pressing plate 13 is connected by screw rod A5, gasket A6, nut A7 with oil cylinder ear 1, and specialized nut 8 is screwed into dedicated spiral shell
On bar 9, on the right side of pressing plate 13, spanner 12 is connected the seam allowance 29 of specialized nut 8 by gasket B11, bolt A10 and specialized nut 8
It is connected in one；By rotating spanner 12, so that 8 rotation of specialized nut rotation, the square toes for stepping up 9 end of bolt special with tool are anti-
Spin-ended turn, bolt special 9 moves axially, and the installation of pin shaft can be completed.
It is easy to operate in conclusion to can provide a kind of structure simple for the utility model, it is safe and reliable, can it is not only good but also
Fast completion dismounts work, and avoids the injury to pin shaft and bearing, while easy to operate, improve production efficiency for standing
Grind the dismantling device of double oil cylinder pin shafts.
The utility model is described in detail in above embodiments, but the content is only the preferable reality of the utility model
Example is applied, should not be considered as limiting the scope of the present invention.Equalization made according to the scope of application of this utility model
Variation and improvement etc., should still belong within the patent covering scope of the utility model.
Claims (8)
1. a kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill, it is characterised in that: the tearing open for the double oil cylinder pin shafts of Vertical Mill
Holding tool includes: pressing plate, bolt, bolt special, specialized nut and spanner, and the pressing plate is equipped with through-hole, pacifies on the through-hole
Equipped with bolt, the bolt can be connect with oil cylinder, lower shake-changing arm or bracket, and the specialized nut covers in pressing plate, and is equipped with
Seam allowance, the seam allowance block the pressing plate, and the spanner is connect by bolt A with specialized nut, the bolt special with it is dedicated
Nut is by being threadedly engaged installation.
2. the dismantling device according to claim 1 for the double oil cylinder pin shafts of Vertical Mill, it is characterised in that: the specialized nut
For closely-pitched internal screw thread, the screw thread of the bolt special is fine thread, and the bolt special end is equipped with square toes.
3. the dismantling device according to claim 1 for the double oil cylinder pin shafts of Vertical Mill, it is characterised in that: the bolt special
End is equipped with fixed plate, and threaded hole, the oil cylinder pin shaft and the bolt special are provided in the fixed plate and is passed through in threaded hole
Bolt B connection, the pressing plate connect by screw rod A with oil cylinder, is cased with nut A on the screw rod A, dedicated when disassembly
For the seam allowance of nut at the inside of pressing plate, installation, the seam allowance of specialized nut is in the outside of pressing plate.
4. the dismantling device according to claim 1 for the double oil cylinder pin shafts of Vertical Mill, it is characterised in that: described to be used for Vertical Mill
The dismantling device of double oil cylinder pin shafts further includes bracket, and the end face of the bracket is connect by bolt E with pin shaft, the bracket edge
Withstand on the outer ring of bearing.
5. the dismantling device according to claim 4 for the double oil cylinder pin shafts of Vertical Mill, it is characterised in that: in the rocker arm
The other side is equipped with bracket, and the carrier edge fixed by bolt C and the lower shake-changing arm, the inside edge of the bracket with it is described
The inside edge of lower shake-changing arm is aligned.
6. the dismantling device according to claim 5 for the double oil cylinder pin shafts of Vertical Mill, it is characterised in that: the bracket is equipped with
Lifting bolt, the bracket end face are equipped with threaded hole.
7. the dismantling device according to claim 6 for the double oil cylinder pin shafts of Vertical Mill, it is characterised in that: described when disassembly
Bolt E passes through bolt special and bracket is fixed with the oil cylinder pin shaft, and the pressing plate is connected by screw rod B and nut B and lower shake-changing arm
Connect one, in the inside of pressing plate, the bracket and the bracket are located at the two sides of lower shake-changing arm for the seam allowance of specialized nut.
8. the dismantling device according to claim 6 for the double oil cylinder pin shafts of Vertical Mill, it is characterised in that: described when installation
Bracket is located at the inside of the bracket, and the bolt special passes through the bracket, and the oil cylinder pin shaft passes through bolt F and dedicated spiral shell
Bar and bracket are connected as one, and the pressing plate is connect by bolt D with bracket, and the seam allowance of specialized nut is in the outside of pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822167600.3U CN209394595U (en) | 2018-12-21 | 2018-12-21 | A kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822167600.3U CN209394595U (en) | 2018-12-21 | 2018-12-21 | A kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209394595U true CN209394595U (en) | 2019-09-17 |
Family
ID=67895854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822167600.3U Active CN209394595U (en) | 2018-12-21 | 2018-12-21 | A kind of dismantling device for the double oil cylinder pin shafts of Vertical Mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209394595U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113982904A (en) * | 2021-11-29 | 2022-01-28 | 黄秀芳 | Drill pump crosshead pin extracting tool |
-
2018
- 2018-12-21 CN CN201822167600.3U patent/CN209394595U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113982904A (en) * | 2021-11-29 | 2022-01-28 | 黄秀芳 | Drill pump crosshead pin extracting tool |
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