CN108953278A - A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke - Google Patents
A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke Download PDFInfo
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- CN108953278A CN108953278A CN201810893731.1A CN201810893731A CN108953278A CN 108953278 A CN108953278 A CN 108953278A CN 201810893731 A CN201810893731 A CN 201810893731A CN 108953278 A CN108953278 A CN 108953278A
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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
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
-
- 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
- F15B15/1423—Component parts; Constructional details
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Press Drives And Press Lines (AREA)
- Transmission Devices (AREA)
- Actuator (AREA)
Abstract
The invention discloses a kind of oil cylinder for hydraulic press brakes of novel adjustable stroke, including piston rod, cylinder body, worm gear, worm screw and cylinder cap, the outer wall of piston rod is flexibly connected with cylinder body, one end of piston rod is equipped with piston, piston is flexibly connected the inner wall of cylinder body by oil sealing guidance tape, cylinder body is connected with screw rod by threaded hole, and one end of screw rod connects piston, is equipped with worm gear, worm screw and nut gear on the inside of cylinder cap；The oil cylinder for hydraulic press brakes of novel adjustable stroke proposed by the present invention, when shaft drives worm gear, worm gear drives worm screw rotation, worm screw can drive nut gear rotation by screw thread, nut gear drives screw rod rotation, it can also be moved up and down along the end face of cylinder body while screw rod rotation, the piston connecting with screw rod can also move up and down therewith, when piston moves up and down, the cavity volume that oils will change with lower oil cavitie volume ratio, the stroke of piston rod so is just adjusted, i.e. the stroke adjustment process of piston rod is simple and convenient.
Description
Technical field
The present invention relates to a kind of hydraulic bending press technical field, in particular to a kind of hydraulic folding of novel adjustable stroke
Bender oil cylinder.
Background technique
Oil cylinder for hydraulic press brakes as the important device in hydraulic bending press, working performance and manufacture for bending machine at
Originally play the role of critical.Bending machine passes through pumping for the telescopic band movable slider of oil cylinder, and sliding block is up and down reciprocatingly
Movement drives the upper mold that is mounted on sliding block to move up and down, and upper mold declines when oil cylinder inner piston rod stretches out, to being fixed on down
Workpiece bending forming on mold；When oil cylinder inner piston rod is shunk, upper mold and lower mold separation.Upper mold and lower mold separation
Maximum distance, that is, oil cylinder impulse stroke.In the prior art, oil cylinder for hydraulic press brakes is provided with stroke adjusting device, stroke
Regulating device is arranged above oil cylinder, so that the rotation of motor transverse direction is become longitudinal rotation, Zong Xiangzhuan by worm gear mechanism
Moving axis is longitudinally rotated by the screwed connection handle with rack becomes longitudinal up and down motion, makes the up and down motion range of cylinder piston rod
It increases or reduces, achievees the purpose that adjust stroke.
China Patent No.: 201420644933.X, publication date；On 2 4th, 2015, disclose a kind of adjustable stroke
Oil cylinder for hydraulic press brakes, the utility model include screw rod, worm gear case, upper oil cavitie, lower oil cavitie, piston rod, guidance tape and cylinder body, institute
The screw rod one end stated is connect with worm gear case, and the other end is inserted into cylinder body；Connection between the screw rod and cylinder body is screw thread company
It connects；Screw rod, worm gear case and the cylinder body forms stroke adjusting device；The piston rod is located in cylinder body；The piston
Bar is piston rod sliding end close to one end of screw rod；Cavity between the screw rod, cylinder body and piston rod sliding end is formed
Oil pocket；The cylinder body is equipped with slide protrusion far from the inside of turbine box one end；Between the piston rod sliding end and cylinder body,
Sealing ring and guidance tape are designed between slide protrusion and piston rod on cylinder body；The piston rod sliding end, piston rod and cylinder
Cavity between body forms lower oil cavitie；The piston rod is solid construction.The utility model is by by screw rod, worm gear case and cylinder
Body forms stroke adjusting device, and equipment can be such that the up and down motion range of cylinder piston rod increases or reduces, reach tune when running
The purpose of stroke is saved, but its property reasonable in design is bad, adjusts convenience and is not improved.
China Patent No.: 201020575715.7, publication date；Disclose a kind of hydraulic bending press oil on May 25th, 2011
Cylinder, the utility model include cylinder body, and piston rod, screw shaft (i.e. screw rod) and worm gear case, the top of the piston rod are placed in cylinder body
It is interior, guide sleeve is equipped between the bottom end and cylinder body of the piston rod, the worm gear case is placed at the top of cylinder body, screw shaft (the i.e. silk
Bar) top pass through cylinder body and piston rod and extend in worm gear case, the top of the screw shaft (i.e. screw rod) is equipped with cooperation worm screw
Worm gear, blind nut is equipped between the top of the piston rod and screw shaft (i.e. screw rod), the top of the blind nut is equipped with oil cylinder cover,
It is characterized by: the oil cylinder cover and cylinder body are integral structure.The utility model is by setting one for oil cylinder cover and cylinder body
Overall structure has reached compact-sized, and precision is high, long service life.But the oil cylinder can only shorten slider row using worm and gear
Journey cannot be such that slider stroke increases, and there are hydraulic oil to let out for setting blind nut between the top of piston rod and screw shaft (i.e. screw rod)
It divulges a secret danger, the processing of blind nut increases production cost, and screw shaft (i.e. screw rod), which protrudes into, increases leakage point in piston rod, piston rod
Complex-shaped, manufacture is difficult, and at high cost, piston rod is hollow structure, and rigidity is deteriorated.
Summary of the invention
A kind of oil cylinder for hydraulic press brakes for being designed to provide novel adjustable stroke of invention, the device have structure letter
It is single, the convenient advantage of adjustment process, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke, including piston rod, cylinder body, worm gear, worm screw and cylinder cap, institute
The inside that piston rod is located at cylinder body is stated, piston rod is solid construction, and the outer wall of piston rod is flexibly connected with cylinder body, the one of piston rod
End is equipped with piston, and oil sealing guidance tape is equipped at the lateral wall of piston, and piston is flexibly connected cylinder body by oil sealing guidance tape
Inner wall offers threaded hole on cylinder body, and cylinder body is connected with screw rod by threaded hole, and one end of screw rod connects piston, screw rod
The end wall of cylinder body is flexibly connected by way of being threadedly engaged, one end of cylinder body is equipped with cylinder cap, is equipped with snail on the inside of cylinder cap
One end of wheel, worm screw and nut gear, the worm screw is flexibly connected cylinder body by bearing, and the other end of worm screw is flexibly connected cylinder cap
Inner wall, worm screw is flexibly connected worm gear by screw thread, and worm screw is also flexibly connected with nut gear, and nut gear is mounted on screw rod
On outer wall.
Preferably, the cavity between the screw rod, piston and cylinder body forms upper oil cavitie.
Preferably, the cavity between the piston rod, piston and cylinder body forms lower oil cavitie, and the volume of upper oil cavitie is much smaller than down
The volume of oil pocket.
Preferably, the screw rod runs through cylinder body, and the junction of screw rod and cylinder body is equipped with sealing ring.
Preferably, the central axis keeping parallelism of the central axis and screw rod of the worm screw.
Preferably, the junction of the piston rod and cylinder body is also equipped with oil sealing guidance tape.
Compared with prior art, the beneficial effects of the present invention are:
1. the oil cylinder for hydraulic press brakes of the utility model adjustable stroke, wherein piston rod is solid construction, and stability is good, piston
One end of bar is equipped with piston, and piston is flexibly connected the inner wall of cylinder body by oil sealing guidance tape, and oil sealing guidance tape can prevent liquid
Pressure oil leakage, cylinder body are connected with screw rod by threaded hole, and one end of screw rod connects piston, between screw rod, piston and cylinder body
Cavity form upper oil cavitie, cavity between piston rod, piston and cylinder body forms lower oil cavitie, passes through the liquid of upper oil cavitie and lower oil cavitie
Pressure oil variation can control the flexible of piston rod；
2. the oil cylinder for hydraulic press brakes of the utility model adjustable stroke, the central axis of worm screw and the central axis of screw rod are kept
In parallel, the stationarity for guaranteeing transmission in this way, when shaft drives worm gear, worm gear drives worm screw rotation, and worm screw is located at the one of screw rod
Side can also drive nut gear rotation when worm screw rotation by screw thread, and nut gear will drive screw rod rotation when rotating, due to silk
Bar is to connect cylinder body by being threadedly engaged, so can also be moved up and down along the end face of cylinder body while screw rod rotation, when
When screw rod moves up and down, the piston connecting with screw rod can also move up and down therewith, when piston moves up and down, the cavity volume that oils with
Lower oil cavitie volume ratio will change, and the stroke of such piston rod is just adjusted, and whole equipment structure is simple, adjust
Process is convenient.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is effect picture after overall structure work of the invention.
In figure: 1, piston rod；11, piston；12, oil sealing guidance tape；2, cylinder body；21, threaded hole；3, worm gear；4, worm screw；5,
Cylinder cap；6, screw rod；7, nut gear；8, upper oil cavitie；9, lower oil cavitie.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke referring to FIG. 1-2, including piston rod 1, cylinder body 2, worm gear
3, worm screw 4 and cylinder cap 5, piston rod 1 are located at the inside of cylinder body 2, and piston rod 1 is solid construction, and piston rod 1 is used for band piston 11
Movement, the outer wall of piston rod 1 are flexibly connected with cylinder body 2, and the junction of piston rod 1 and cylinder body 2 is also equipped with oil sealing guidance tape 12,
Oil sealing guidance tape 12 can prevent hydraulic oil from revealing, and one end of piston rod 1 is equipped with piston 11, install at the lateral wall of piston 11
There is oil sealing guidance tape 12, oil sealing guidance tape 12 can prevent hydraulic oil from revealing, and piston 11 is flexibly connected by oil sealing guidance tape 12
The inner wall of cylinder body 2 offers threaded hole 21 on cylinder body 2, and threaded hole 21 is located at the center of 2 end face of cylinder body, and cylinder body 2 passes through screw thread
Hole 21 is connected with screw rod 6, i.e. the outside of screw rod 6 also offers screw thread, and screw rod 6 is connect by screw thread with cylinder body 2, i.e. screw rod
6 can move along the center line of cylinder body 2, and one end of screw rod 6 connects piston 11, the activity by way of being threadedly engaged of screw rod 6
The end wall for connecting cylinder body 2, the cavity between screw rod 6, piston 11 and cylinder body 2 form upper oil cavitie 8, piston rod 1, piston 11 and cylinder body
Cavity between 2 forms lower oil cavitie 9, and the volume of upper oil cavitie 8 is much smaller than the volume of lower oil cavitie 9, passes through upper oil cavitie 8 and lower oil cavitie 9
Hydraulic oil variation can control the flexible of piston rod 1, one end of cylinder body 2 is equipped with cylinder cap 5, and the inside of cylinder cap 5 is equipped with snail
One end of wheel 3, worm screw 4 and nut gear 7, worm screw 4 is flexibly connected cylinder body 2 by bearing, and the other end of worm screw 4 is flexibly connected cylinder
The inner wall of lid 5, i.e. worm screw 4 can offer multiple groups screw thread in the inside rotation of cylinder cap 5, worm screw 4, and worm screw 4 is living by screw thread
Dynamic connection worm gear 3, worm screw 4 are also flexibly connected with nut gear 7, i.e., when worm screw 4 rotates, nut gear 7 can also be rotated with it,
The central axis of worm screw 4 and the central axis keeping parallelism of screw rod 6 guarantee that the stationarity of transmission, nut gear 7 are mounted in this way
On the outer wall of screw rod 6, when nut gear 7 rotates, screw rod 6 can also be rotated with it, and screw rod 6 runs through cylinder body 2, screw rod 6 and cylinder body 2
Junction sealing ring is installed, the outer wall of screw rod 6 offers screw thread, and screw rod 6 is matched by screw thread with the threaded hole 21 on cylinder body 2
It closes.
The oil cylinder for hydraulic press brakes of the utility model adjustable stroke, wherein piston rod 1 is solid construction, and piston rod 1 is used for band
Piston 11 moves, and the outer wall of piston rod 1 is flexibly connected with cylinder body 2, and one end of piston rod 1 is equipped with piston 11, and piston 11 is logical
The inner wall that oil sealing guidance tape 12 is flexibly connected cylinder body 2 is crossed, oil sealing guidance tape 12 can prevent hydraulic oil from revealing, the end face of cylinder body 2
Threaded hole 21 is offered at center, cylinder body 2 is connected with screw rod 6 by threaded hole 21, i.e. the outside of screw rod 6 also offers
Screw thread, screw rod 6 can be moved along the center line of cylinder body 2, and one end of screw rod 6 connects piston 11, screw rod 6, piston 11 and cylinder body 2
Between cavity form upper oil cavitie 8, cavity between piston rod 1, piston 11 and cylinder body 2 forms lower oil cavitie 9, passes through upper oil cavitie 8
Hydraulic oil variation with lower oil cavitie 9 can control the flexible of piston rod 1, and the inside of cylinder cap 5 is equipped with worm gear 3, worm screw 4 and nut
Gear 7, worm screw 4 can offer multiple groups screw thread in the inside rotation of cylinder cap 5, worm screw 4, and worm screw 4 not only passes through screw thread activity
Worm gear 3 is connected, worm screw 4 is also flexibly connected with nut gear 7, i.e., nut gear 7 can also rotate with it when worm screw 4 rotates, snail
The central axis of bar 4 and the central axis keeping parallelism of screw rod 6 guarantee that the stationarity of transmission, nut gear 7 are mounted on silk in this way
On the outer wall of bar 6, when nut gear 7 rotates, screw rod 6 can also be rotated with it, when the work for needing to change oil cylinder for hydraulic press brakes
When stroke, it is only necessary to drive worm gear 3 to rotate by shaft, specific workflow is, when shaft drives worm gear 3, worm gear 3
Drive 4 rotation of worm screw, worm screw 4 is located at the side of screw rod 6, when 4 rotation of worm screw can also by screw thread drive 7 rotation of nut gear,
Nut gear 7 will drive the rotation of screw rod 6 when rotating, since screw rod 6 is to connect cylinder body 2 by being threadedly engaged, so screw rod 6
It can also be moved up and down along the end face of cylinder body 2 while rotation, when screw rod 6 moves up and down, the piston 11 that is connect with screw rod 6
It can move up and down therewith, when piston 11 moves up and down, 8 volume of upper oil cavitie will change with 9 volume ratio of lower oil cavitie, this
The stroke of sample piston rod 1 is just adjusted.
In conclusion the oil cylinder for hydraulic press brakes of novel adjustable stroke proposed by the present invention, piston 11 are led by oil sealing
The inner wall of cylinder body 2 is flexibly connected to band 12, cylinder body 2 is connected with screw rod 6, screw rod 6, piston 11 and cylinder body by threaded hole 21
Cavity between 2 forms upper oil cavitie 8, and the cavity between piston rod 1, piston 11 and cylinder body 2 forms lower oil cavitie 9, when shaft drives
When worm gear 3, worm gear 3 drives 4 rotation of worm screw, and worm screw 4 can drive 7 rotation of nut gear by screw thread, and nut gear 7 drives screw rod
6 rotations, 6 rotation of screw rod while, can also move up and down along the end face of cylinder body 2, and the piston 11 connecting with screw rod 6 also can be therewith
It moves up and down, when piston 11 moves up and down, 8 volume of upper oil cavitie will change with 9 volume ratio of lower oil cavitie, such piston
The stroke of bar 1 is just adjusted, i.e. the stroke adjustment process of piston rod 1 is simple and convenient, is compared existing regulative mode, is originally set
Standby structure is simpler, operates more convenient.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of oil cylinder for hydraulic press brakes of novel adjustable stroke, including piston rod (1), cylinder body (2), worm gear (3), worm screw
(4) and cylinder cap (5), it is characterised in that: the piston rod (1) is located at the inside of cylinder body (2), and piston rod (1) is solid construction, living
The outer wall of stopper rod (1) is flexibly connected with cylinder body (2), and one end of piston rod (1) is equipped with piston (11), the lateral wall of piston (11)
Place is equipped with oil sealing guidance tape (12), and piston (11) is flexibly connected the inner wall of cylinder body (2), cylinder body by oil sealing guidance tape (12)
(2) it is offered on threaded hole (21), cylinder body (2) is connected with screw rod (6) by threaded hole (21), and one end of screw rod (6) connects
It takes over a job plug (11), screw rod (6) is flexibly connected the end wall of cylinder body (2) by way of being threadedly engaged, and one end of cylinder body (2) is equipped with
Cylinder cap (5) is equipped with worm gear (3), worm screw (4) and nut gear (7) on the inside of cylinder cap (5), and one end of the worm screw (4) passes through
Bearing is flexibly connected cylinder body (2), and the other end of worm screw (4) is flexibly connected the inner wall of cylinder cap (5), and worm screw (4) passes through screw thread activity
It connects worm gear (3), worm screw (4) is also flexibly connected with nut gear (7), and nut gear (7) is mounted on the outer wall of screw rod (6).
2. a kind of oil cylinder for hydraulic press brakes of novel adjustable stroke according to claim 1, it is characterised in that: the silk
Cavity between bar (6), piston (11) and cylinder body (2) forms upper oil cavitie (8).
3. a kind of oil cylinder for hydraulic press brakes of novel adjustable stroke according to claim 1, it is characterised in that: the work
Cavity between stopper rod (1), piston (11) and cylinder body (2) forms lower oil cavitie (9), and the volume of upper oil cavitie (8) is much smaller than lower oil cavitie
(9) volume.
4. a kind of oil cylinder for hydraulic press brakes of novel adjustable stroke according to claim 1, it is characterised in that: the silk
Bar (6) runs through cylinder body (2), and the junction of screw rod (6) and cylinder body (2) is equipped with sealing ring.
5. a kind of oil cylinder for hydraulic press brakes of novel adjustable stroke according to claim 1, it is characterised in that: the snail
The central axis of bar (4) and the central axis keeping parallelism of screw rod (6).
6. a kind of oil cylinder for hydraulic press brakes of novel adjustable stroke according to claim 1, it is characterised in that: the work
The junction of stopper rod (1) and cylinder body (2) is also equipped with oil sealing guidance tape (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810893731.1A CN108953278A (en) | 2018-08-03 | 2018-08-03 | A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810893731.1A CN108953278A (en) | 2018-08-03 | 2018-08-03 | A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108953278A true CN108953278A (en) | 2018-12-07 |
Family
ID=64468459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810893731.1A Pending CN108953278A (en) | 2018-08-03 | 2018-08-03 | A kind of oil cylinder for hydraulic press brakes of novel adjustable stroke |
Country Status (1)
| Country | Link |
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| CN (1) | CN108953278A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814969A (en) * | 2021-01-18 | 2021-05-18 | 张书荣 | Engineering hydraulic cylinder of adjustable stroke |
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| CN2649837Y (en) * | 2003-09-26 | 2004-10-20 | 江都市永坚有限公司 | Hydraulic cylinder of bending machine |
| CN201144921Y (en) * | 2007-12-29 | 2008-11-05 | 江苏国力锻压机床有限公司 | Oil cylinder for bender |
| CN201218250Y (en) * | 2008-07-18 | 2009-04-08 | 佛山市南海力丰机床有限公司 | Main hydraulic cylinder for hydraulic bending machine |
| CN204003757U (en) * | 2014-08-18 | 2014-12-10 | 安徽五洋机床制造有限公司 | A kind of oil hydraulic cylinder without back cylinder cover |
| CN204140539U (en) * | 2014-10-30 | 2015-02-04 | 安徽五洋机床制造有限公司 | A kind of oil cylinder for hydraulic press brakes of adjustable stroke |
| CN104500491A (en) * | 2014-12-22 | 2015-04-08 | 盐城雄鹰精密机械有限公司 | Oil cylinder stroke control device |
| CN106151159A (en) * | 2015-03-31 | 2016-11-23 | 扬州润泽液压有限公司 | One can automatic adjustable oil cylinder |
-
2018
- 2018-08-03 CN CN201810893731.1A patent/CN108953278A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2649837Y (en) * | 2003-09-26 | 2004-10-20 | 江都市永坚有限公司 | Hydraulic cylinder of bending machine |
| CN201144921Y (en) * | 2007-12-29 | 2008-11-05 | 江苏国力锻压机床有限公司 | Oil cylinder for bender |
| CN201218250Y (en) * | 2008-07-18 | 2009-04-08 | 佛山市南海力丰机床有限公司 | Main hydraulic cylinder for hydraulic bending machine |
| CN204003757U (en) * | 2014-08-18 | 2014-12-10 | 安徽五洋机床制造有限公司 | A kind of oil hydraulic cylinder without back cylinder cover |
| CN204140539U (en) * | 2014-10-30 | 2015-02-04 | 安徽五洋机床制造有限公司 | A kind of oil cylinder for hydraulic press brakes of adjustable stroke |
| CN104500491A (en) * | 2014-12-22 | 2015-04-08 | 盐城雄鹰精密机械有限公司 | Oil cylinder stroke control device |
| CN106151159A (en) * | 2015-03-31 | 2016-11-23 | 扬州润泽液压有限公司 | One can automatic adjustable oil cylinder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112814969A (en) * | 2021-01-18 | 2021-05-18 | 张书荣 | Engineering hydraulic cylinder of adjustable stroke |
| CN112814969B (en) * | 2021-01-18 | 2022-07-22 | 无锡江南高精度冷拔管有限公司 | Engineering hydraulic cylinder of adjustable stroke |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |
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| RJ01 | Rejection of invention patent application after publication |