CN104373415B - A kind of hydraulic jack - Google Patents
A kind of hydraulic jack Download PDFInfo
- Publication number
- CN104373415B CN104373415B CN201410581602.0A CN201410581602A CN104373415B CN 104373415 B CN104373415 B CN 104373415B CN 201410581602 A CN201410581602 A CN 201410581602A CN 104373415 B CN104373415 B CN 104373415B
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- cylinder
- plunger rod
- hydraulic jack
- mouth
- 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.)
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052802 copper Inorganic materials 0.000 claims abstract description 19
- 239000010949 copper Substances 0.000 claims abstract description 19
- 239000002313 adhesive film Substances 0.000 claims abstract description 12
- 230000004308 accommodation Effects 0.000 claims abstract description 10
- 239000000919 ceramic Substances 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000000446 fuel Substances 0.000 claims description 8
- 230000004323 axial length Effects 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 description 7
- 239000003921 oil Substances 0.000 description 5
- 238000005498 polishing Methods 0.000 description 4
- 239000011195 cermet Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
Abstract
The present invention relates to technical field of hydraulic pressure, particularly relate to a kind of hydraulic jack.A kind of hydraulic jack, it is characterized in that, including a cylinder body and a plunger rod, described plunger rod is arranged in the accommodation space of described cylinder body, described cylinder body has a mouth of pipe and a bottom corresponding with the described mouth of pipe, an accommodation space is formed between described cylinder base and described inboard wall of cylinder block, described inboard wall of cylinder block is divided into one first cylinder body and one second cylinder body along the sectional design that axially does of described cylinder body, described first cylinder body is between described second cylinder body and described bottom, the inner wall surface of described second cylinder body sets gradually a copper film layer and an adhesive film, to improve the wearability of the second inboard wall of cylinder block, and then improve service life and the operating efficiency of hydraulic jack of hydraulic jack.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, particularly relate to a kind of hydraulic jack.
Background technology
Along with the fast development of China's economic construction, hydraulic system is in the application of engineering machinery field
Just increasingly extensive.Hydraulic system is using hydraulic oil as working media, utilizes the pressure of hydraulic oil
Power and can handle the package unit of hydraulic actuating mechanism work by hydraulic control component etc..Its
In, hydraulic jack is the crucial element of hydraulic system.
Hydraulic jack includes plunger rod and cylinder body.Fuel feed hole on cylinder body is passed through in cylinder interior
Hydraulic oil, the promotion lower prop stopper rod at hydraulic oil stretches out cylinder body therewith.Due to plunger rod and cylinder body
Oil gas between inside is compressed, and high-pressure oil gas makes the friction between plunger rod and cylinder interior
Power is increasing.Wherein, cylinder body is maximum near the frictional force of internal wall of pipe orifice, so causes cylinder body
The most impaired near internal wall of pipe orifice, and then affect the service life of hydraulic jack and the work of hydraulic jack
Make efficiency.
Summary of the invention
In view of this, the present invention by set gradually on the second inboard wall of cylinder block surface a copper film layer and
One adhesive film, to improve the wearability of the second inboard wall of cylinder block, and then improves the use of hydraulic jack
Life-span and the operating efficiency of hydraulic jack.
A kind of hydraulic jack that the present invention provides, it is characterised in that include a cylinder body and a plunger
Bar, described cylinder body has a mouth of pipe and a bottom corresponding with the described mouth of pipe, at the bottom of described cylinder body
Forming an accommodation space between portion and described inboard wall of cylinder block, described inboard wall of cylinder block is along described cylinder body
The sectional design that axially does be divided into one first cylinder body and one second cylinder body, described first cylinder body
Between described second cylinder body and described bottom, described second cylinder body is perpendicular to described Boring mill
To size be perpendicular to the size that described cylinder body is axial, correspondingly, post more than described first cylinder body
Stopper rod is stepped design from the mouth of pipe to bottom, and one end that plunger rod and the second cylinder body coordinate is perpendicular to
The axial size of described cylinder body is perpendicular to institute more than the other end of plunger rod with the cooperation of the first cylinder body
State the size that cylinder body is axial, wherein, the inner wall surface of described second cylinder body arranges a copper film
Layer, arranges an adhesive film on described copper film layer, and described plunger rod is arranged at the appearance of described cylinder body
In being empty.
Further, described second cylinder body is less than described first cylinder body edge along the length that cylinder body is axial
The length that cylinder body is axial.
Further, described first inboard wall of cylinder block surrounds a cylinder, and described second inboard wall of cylinder block surrounds
One cylinder, correspondingly, one end that plunger rod and the second cylinder body coordinate is cylinder.
Described first inboard wall of cylinder block surrounds a cylinder, and described second inboard wall of cylinder block surrounds a round platform,
And described second inboard wall of cylinder block is perpendicular to the axial size of described cylinder body from the described mouth of pipe to described
Bottom is gradually reduced；Correspondingly, one end that plunger rod and the second cylinder body coordinate is a round platform, and
One end that plunger rod and the second cylinder body coordinate is perpendicular to the axial size of described cylinder body from described pipe
Mouth to described bottom is gradually reduced.
Further, the inner wall surface of described first cylinder body arranges a metal ceramic wear-resisting layer.Institute
State and a metal ceramic wear-resisting layer is set in the inner wall surface of the second cylinder body, be positioned at described second cylinder
The metal ceramic wear-resisting layer of wall is between described second cylinder surface and described copper film layer.
Further, the bottom of described cylinder body is provided with a fuel feed hole, and described fuel feed hole is positioned at institute
State the centre position of cylinder base.
Further, the bottom of described cylinder body is provided with a check valve.
The hydraulic jack that the present invention provides is by setting gradually a bronze medal on the second inboard wall of cylinder block surface
Film layer and an adhesive film, copper film layer has high polishing machine, high-termal conductivity, good plasticity and low
The characteristics such as shrinkage factor, to improve the wearability of the second cylinder surface, and then improve hydraulic jack
Service life and the operating efficiency of hydraulic jack.Separately, due to adhesive film, there is high-ductility, good
Wearability, to improve the sealing between plunger rod and cylinder body, improve second the most further
The wearability on inboard wall of cylinder block surface..
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of the hydraulic jack that the present invention provides；
Fig. 2 is the structural representation of the second embodiment of the hydraulic jack that the present invention provides；
Fig. 3 is the structural representation of the 3rd embodiment of the hydraulic jack that the present invention provides；And
Fig. 4 is the structural representation of the 4th embodiment of the hydraulic jack that the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present invention
Case is clearly and completely described.Obviously, described embodiment is only the one of the present invention
Section Example rather than whole embodiments.Additionally, use such as " first " in the text
Describe with " second " etc., only in order to distinguish different assemblies, the not limit to its generation order
System.
Fig. 1 is the structural representation of the first embodiment of the hydraulic jack that the present invention provides.Such as figure
Shown in 1, the hydraulic jack that the embodiment of the present invention provides, including cylinder body 10 and a plunger rod
40。
Cylinder body 10 has a mouth of pipe and a bottom 15 relative with the mouth of pipe, the bottom of cylinder body 10
An accommodation space is formed between 15 and cylinder body 10 inwall.Cylinder body 10 inwall is along the axle of cylinder body
Sectional design is done to divide one first cylinder body 11 and one second cylinder body 12 in direction, first
Cylinder body 11 is between the second cylinder body 12 and bottom 15.Second cylinder body 12 is perpendicular to Boring mill
To size be perpendicular to the size that cylinder body is axial more than the first cylinder body 11, the second cylinder body 12 is along cylinder
The axial length of body less than the first cylinder body 11 along the axial length of cylinder body.First cylinder body 11 inwall
Surrounding a cylinder, the second cylinder body 12 inwall surrounds a cylinder, and in other words, cylinder body 10 is internal
From the mouth of pipe to bottom 15 in stepped design.Correspondingly, plunger rod is ladder from the mouth of pipe to bottom
The size that one end that design, plunger rod and the second cylinder body coordinate is perpendicular to described cylinder body axial is more than
The other end that plunger rod and the first cylinder body coordinate is perpendicular to the size that described cylinder body is axial；Plunger rod
The one end coordinated with the second cylinder body is designed as cylinder.
The inner wall surface of the second cylinder body 12 arranges a copper film layer 20, at copper film layer 20 table
One adhesive film 30 is set on face.Copper film layer 20 is between adhesive film 30 and the second cylinder body 12.
Plunger rod 40 is arranged in the accommodation space within cylinder body 10, and adhesive film 30 is positioned at copper film layer
Between 20 and plunger rod 40.Plunger rod 40 axially the most axially in parallel with cylinder body 10, plunger rod
40 internal axially the moving reciprocatingly along plunger rod of cylinder body 10.Copper film layer 20 has height
The characteristics such as polishing machine, high-termal conductivity, good plasticity and low-shrinkage, the hydraulic pressure of the present embodiment
Oil cylinder is by arranging one layer of copper film layer 20 to improve the second cylinder body in the second cylinder body 12 inner wall surface
The wearability on 12 surfaces, and then improve service life and the work of hydraulic jack of hydraulic jack
Efficiency.Owing to adhesive film 30 has high-ductility, good wearability, the hydraulic pressure of the present embodiment
Oil cylinder arranges an adhesive film 30 to improve plunger rod 40 between plunger rod 40 and copper film layer 20
And the sealing between cylinder body 10, improves the resistance to of the second cylinder body 12 inner wall surface the most further
Mill property.
It addition, the bottom 15 of cylinder body 10 arranges a fuel feed hole 13, fuel feed hole 13 is positioned at cylinder body
The centre position of the bottom 15 of 10.Hydraulic oil enters in cylinder body 10 by fuel feed hole 13,
And then drive plunger rod 40 stretches out outside the spout part of cylinder body 10.
In the bottom 15 of cylinder body 10, a check valve 14 is set.At plunger rod 40 towards cylinder body 10
The mouth of pipe outside stretch out during, when liquid oil cylinder needs holding position,Check valve14
Hydraulic oil can be sealed in cylinder body 10 internal.At plunger rod 40 towards inside the mouth of pipe of cylinder body
During stretching into, check valve 14 is opened, and hydraulic oil flows out from check valve 14.
The annexation of other inter-modules more optionally changed by the hydraulic jack of the present embodiment,
And there is different embodiments, illustrate below for different embodiments of the invention.Wherein
For highlighting not existing together between an embodiment, identical assembly represents with identical label, the most separately
Repeat outward.
Fig. 2 is the structural representation of the second embodiment of the hydraulic jack that the present invention provides.Such as figure
Shown in 2, the hydraulic jack that the embodiment of the present invention provides, including cylinder body 10 and a plunger rod
40.Cylinder body 10 has a mouth of pipe and a bottom 15 relative with the mouth of pipe, the bottom of cylinder body 10
An accommodation space is formed between 15 and cylinder body 10 inwall.Cylinder body 10 inwall is along the axle of cylinder body
Sectional design is done to divide one first cylinder body 11 and one second cylinder body 12 in direction.With
The one different part of embodiment is: arrange a gold medal in the inner wall surface of the first cylinder body 11
Belong to ceramic wearing coat 50, metal ceramic wear-resisting layer 50 have high polishing machine, high-termal conductivity,
Good plasticity, low-shrinkage.The present embodiment is by setting in the inner wall surface of the first cylinder body 11
Put a metal ceramic wear-resisting layer 50, improve the wearability of the first cylinder body 11 inner wall surface, enter
And improve the service life of hydraulic jack and the operating efficiency of hydraulic jack.Noticeable at this
It is that metal ceramic wear-resisting layer 50 is only arranged at the inwall table of the first cylinder body 11 in the present embodiment
On face, the present embodiment is not limited thereto.In other embodiments, metal ceramic wear-resisting layer
In 50 inner wall surface being arranged at cylinder body 10, the i.e. first cylinder body 11 is interior with the second cylinder body 12
A metal ceramic wear-resisting layer 50, the cermet of the second cylinder body 12 inwall it is respectively provided with on wall surface
Wearing layer 50 is between the first cylinder body 11 and copper film layer 20.
Fig. 3 is the structural representation of the 3rd embodiment of the hydraulic jack that the present invention provides.Such as figure
Shown in 3, the hydraulic jack that the embodiment of the present invention provides, including cylinder body 10 and a plunger rod
40.Cylinder body 10 has a mouth of pipe and a bottom 15 relative with the mouth of pipe, the bottom of cylinder body 10
An accommodation space is formed between 15 and cylinder body 10 inwall.Cylinder body 10 inwall is along the axle of cylinder body
Sectional design is done to divide one first cylinder body 11 and one second cylinder body 12 in direction.With
The one different part of embodiment is: the first cylinder body 11 inwall surrounds a cylinder, the second cylinder
Body 12 inwall surrounds a round platform, and the second cylinder body 12 inwall is perpendicular to the chi that cylinder body 10 is axial
Very little it is gradually reduced to bottom 15 from the mouth of pipe.Correspondingly, plunger rod is ladder from the mouth of pipe to bottom
The size that one end that design, plunger rod and the second cylinder body coordinate is perpendicular to described cylinder body axial is more than
The other end that plunger rod and the first cylinder body coordinate is perpendicular to the size that described cylinder body is axial；Plunger rod
The one end coordinated with the second cylinder body is a round platform, and hangs down in one end that plunger rod and the second cylinder body coordinate
Directly it is gradually reduced to described bottom from the described mouth of pipe in the size that described cylinder body is axial.
Fig. 4 is the structural representation of the 4th embodiment of the hydraulic jack that the present invention provides.Such as figure
Shown in 4, as shown in Figure 4, the hydraulic jack that the embodiment of the present invention provides, including a cylinder body 10
And a plunger rod 40.Cylinder body 10 has a mouth of pipe and a bottom 15 relative with the mouth of pipe, cylinder body
An accommodation space is formed between bottom 15 and cylinder body 10 inwall of 10.Cylinder body 10 inwall along
Sectional design is done to divide one first cylinder body 11 and one second cylinder body in the axial direction of cylinder body
12.It is with the 3rd different part of embodiment: in the inner wall surface of the first cylinder body 11
Arranging a metal ceramic wear-resisting layer 50, metal ceramic wear-resisting layer 50 has high polishing machine, height
Thermal conductivity, good plasticity, low-shrinkage.The present embodiment is by the inwall at the first cylinder body 11
One metal ceramic wear-resisting layer 50 is set on surface, improves the resistance to of the first cylinder body 11 inner wall surface
Mill property, and then improve service life and the operating efficiency of hydraulic jack of hydraulic jack.In this value
Obtain it is noted that metal ceramic wear-resisting layer 50 is only arranged at the first cylinder body 11 in the present embodiment
Inner wall surface on, this reality invention be not limited thereto.In other embodiments, cermet
Wearing layer 50 is arranged in the inner wall surface of cylinder body 10, the i.e. first cylinder body 11 and the second cylinder body
A metal ceramic wear-resisting layer 50, the gold of the second cylinder body 12 inwall it is respectively provided with in the inner wall surface of 12
Belong to ceramic wearing coat 50 between the first cylinder body 11 and copper film layer 20.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all
Within the scope of protection of the invention should being included in.
Claims (5)
- null1. a hydraulic jack，It is characterized in that，Including a cylinder body and a plunger rod，Described cylinder body has a mouth of pipe and a bottom corresponding with the described mouth of pipe，An accommodation space is formed between described cylinder base and described inboard wall of cylinder block，Described inboard wall of cylinder block axially doing sectional design and being divided into one first cylinder body and one second cylinder body along described cylinder body，Cylinder interior is stepped design from the mouth of pipe to bottom，Described first cylinder body is between described second cylinder body and described bottom，Described second cylinder body is perpendicular to the axial size of described cylinder body and is perpendicular to, more than described first cylinder body, the size that described cylinder body is axial，Plunger rod is arranged in the accommodation space of cylinder interior，Plunger rod axially the most axially in parallel with cylinder body，Plunger rod is cylinder interior axially moving reciprocatingly along plunger rod，Described first inboard wall of cylinder block surrounds a cylinder，Described second inboard wall of cylinder block surrounds a cylinder，Or described second inboard wall of cylinder block surrounds a round platform，And described second inboard wall of cylinder block is perpendicular to the axial size of described cylinder body and is gradually reduced to described bottom from the described mouth of pipe，Correspondingly，Plunger rod is stepped design from the mouth of pipe to bottom，One end that plunger rod and the second cylinder body coordinate is perpendicular to the axial size of described cylinder body and is perpendicular to, more than the other end of plunger rod and the cooperation of the first cylinder body, the size that described cylinder body is axial；One end that plunger rod and the second cylinder body coordinate is cylinder, or one end that plunger rod and the second cylinder body coordinate is a round platform, and one end of plunger rod and the cooperation of the second cylinder body is perpendicular to the axial size of described cylinder body and is gradually reduced to described bottom from the described mouth of pipe, wherein, the inner wall surface of described second cylinder body arranges a copper film layer, described copper film layer arranges an adhesive film, adhesive film is between copper film layer and plunger rod, one metal ceramic wear-resisting layer is set in the inner wall surface of described second cylinder body, the metal ceramic wear-resisting layer of described second inside wall of cylinder is between described second cylinder surface and described copper film layer.
- A kind of hydraulic jack the most according to claim 1, it is characterised in that described second cylinder body along the axial length of cylinder body less than described first cylinder body along the axial length of cylinder body.
- A kind of hydraulic jack the most according to claim 1, it is characterised in that a metal ceramic wear-resisting layer is set in the inner wall surface of described first cylinder body.
- A kind of hydraulic jack the most according to claim 1, it is characterised in that the bottom of described cylinder body is provided with a fuel feed hole, and described fuel feed hole is positioned at the centre position of described cylinder base.
- A kind of hydraulic jack the most according to claim 1, it is characterised in that the bottom of described cylinder body is provided with a check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410581602.0A CN104373415B (en) | 2014-10-27 | 2014-10-27 | A kind of hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410581602.0A CN104373415B (en) | 2014-10-27 | 2014-10-27 | A kind of hydraulic jack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104373415A CN104373415A (en) | 2015-02-25 |
| CN104373415B true CN104373415B (en) | 2016-09-07 |
Family
ID=52552517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410581602.0A Active CN104373415B (en) | 2014-10-27 | 2014-10-27 | A kind of hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104373415B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5080056A (en) * | 1991-05-17 | 1992-01-14 | General Motors Corporation | Thermally sprayed aluminum-bronze coatings on aluminum engine bores |
| CN1225152A (en) * | 1996-12-05 | 1999-08-04 | 曼B与W狄赛尔公司 | A cylinder element, such as a cylinder liner, A piston, a piston skirt or a piston ring, in an internal combustion engine of the diesel type,and a piston ring for such an engine |
| CN201507644U (en) * | 2009-09-29 | 2010-06-16 | 韶关市卫士液压科技有限公司 | Hydraulic cylinder with high performance, high reliability, and long service life |
| CN202031905U (en) * | 2011-02-25 | 2011-11-09 | 合肥合锻机床股份有限公司 | Hydraulic ram |
| CN202165594U (en) * | 2011-07-27 | 2012-03-14 | 江苏国力锻压机床有限公司 | Plunger oil cylinder of hydraulic press |
| CN202170994U (en) * | 2011-08-08 | 2012-03-21 | 南车二七车辆有限公司 | Brake cylinder body |
| CN103291686A (en) * | 2013-05-15 | 2013-09-11 | 江苏天鹏机电制造有限公司 | Middle cylinder of plunger-type hydraulic cylinder |
| CN204300013U (en) * | 2014-10-27 | 2015-04-29 | 湖州环丰机械有限公司 | A kind of hydraulic jack |
-
2014
- 2014-10-27 CN CN201410581602.0A patent/CN104373415B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5080056A (en) * | 1991-05-17 | 1992-01-14 | General Motors Corporation | Thermally sprayed aluminum-bronze coatings on aluminum engine bores |
| CN1225152A (en) * | 1996-12-05 | 1999-08-04 | 曼B与W狄赛尔公司 | A cylinder element, such as a cylinder liner, A piston, a piston skirt or a piston ring, in an internal combustion engine of the diesel type,and a piston ring for such an engine |
| CN201507644U (en) * | 2009-09-29 | 2010-06-16 | 韶关市卫士液压科技有限公司 | Hydraulic cylinder with high performance, high reliability, and long service life |
| CN202031905U (en) * | 2011-02-25 | 2011-11-09 | 合肥合锻机床股份有限公司 | Hydraulic ram |
| CN202165594U (en) * | 2011-07-27 | 2012-03-14 | 江苏国力锻压机床有限公司 | Plunger oil cylinder of hydraulic press |
| CN202170994U (en) * | 2011-08-08 | 2012-03-21 | 南车二七车辆有限公司 | Brake cylinder body |
| CN103291686A (en) * | 2013-05-15 | 2013-09-11 | 江苏天鹏机电制造有限公司 | Middle cylinder of plunger-type hydraulic cylinder |
| CN204300013U (en) * | 2014-10-27 | 2015-04-29 | 湖州环丰机械有限公司 | A kind of hydraulic jack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104373415A (en) | 2015-02-25 |
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Denomination of invention: A hydraulic cylinder Effective date of registration: 20231130 Granted publication date: 20160907 Pledgee: Zhejiang Deqing Rural Commercial Bank Co.,Ltd. leidian sub branch Pledgor: HUZHOU HUANFENG MACHINERY Co.,Ltd. Registration number: Y2023980068377 |