CN102173095A - Hydraulic machine and hydraulic execution device thereof - Google Patents
Hydraulic machine and hydraulic execution device thereof Download PDFInfo
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- CN102173095A CN102173095A CN2011100597930A CN201110059793A CN102173095A CN 102173095 A CN102173095 A CN 102173095A CN 2011100597930 A CN2011100597930 A CN 2011100597930A CN 201110059793 A CN201110059793 A CN 201110059793A CN 102173095 A CN102173095 A CN 102173095A
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Abstract
The invention discloses a hydraulic execution device of a hydraulic machine, and the device provided by the invention comprises a hydraulic cylinder (11), wherein the hydraulic cylinder (11) is fixed on the hydraulic machine through a fixing part of the hydraulic cylinder (11), the hydraulic execution device further comprises a sliding block (12) which moves up and down along with a movable part of the hydraulic cylinder (11), and the sliding block (12) is movably connected with the movable part so as to enable the sliding block (12) to conveniently rotate around the horizontal plane relative to the joint; and the movable part of the hydraulic cylinder (11) in the hydraulic execution device can be prevented from inclining along with the inclination of the sliding block (12) due to non-uniform stress, and can carry out coaxial line motion together with a cylinder body, thereby reducing the abrasion loss of the hydraulic cylinder (11), further prolonging the service life of the hydraulic cylinder (11), simultaneously avoiding damage to a sealing element in the hydraulic cylinder (11) due to extrusion, avoiding the sealing failure phenomenon of the hydraulic cylinder (11) and increasing the reliability of working of the hydraulic cylinder (11). In addition, the invention further provides the hydraulic machine comprising the hydraulic execution device.
Description
Technical field
The present invention relates to the hydraulic press technical field, particularly a kind of hydraulic pressure execution device of hydraulic press.In addition, the invention still further relates to a kind of hydraulic press that comprises above-mentioned hydraulic pressure execution device.
Background technology
Hydraulic press is a kind of pressure energy that utilizes liquid, the dependence hydrostatic pressure makes workpiece deformation or makes the equipment of material compression moulding, along with development and national economy, particularly along with industrial departments such as automobile, aviation, boats and ships, metallurgy, traffic to large forgings, the growing needs of forging part, large hydraulic press is applied to each economic field such as civilian industry and national defense industry more and more widely, and very important effect is arranged.
According to the difference of hydraulic fluid, hydraulic press is divided into hydraulic press and hydraulic press, and large hydraulic press is generally hydraulic press, comprising entablature, the slide block that is arranged at a plurality of hydraulic jacks on the entablature and is connected with hydraulic jack; Hydraulic jack generally is fastened on the crossbeam by cylinder mouth convex shoulder and nut, and hydraulic jack top is provided with prefill valve and surge-tank, satisfies its work requirements.The piston rod of hydraulic jack is provided with the two way seal element, and working cylinder is divided into upper and lower cavity, at the bottom cylinder end cap fairlead and potted component is housed, and uses flange screw, to guarantee the sealing of cavity of resorption.
The piston rod of hydraulic jack also is connected with the slide block of control stroke, the connected mode of slide block and plunger rod is fixedly connected for what directly or indirectly contact in the prior art, to guarantee the reliability of both transmission of power, forging and pressing module required workpiece, that have definite shape and structure is installed under the slide block.
During hydraulic press work, the plunger rod of hydraulic jack drives slide block and moves straight down, and slide block drives block motion is finished workpiece to desired location or pressure compacting.
Along with becoming increasingly complex of the shape of rolled-up stock, the structure of module is also just complicated more, hydraulic press is when work, because module each several part structure difference, the suffered power of its appropriate section is also just different, the suffered power size of the each several part of the slide block that is connected with module is also with inequality, make slide block produce bigger offset loading force, slide block will produce certain inclination, also will drive the plunger rod of fixedlying connected with it in the time of slider tilt, make the cylinder body disalignment of itself and hydraulic jack, cause the plucking of cylinder wall and plunger rod, damage the potted component of hydraulic jack simultaneously, hydraulic jack was lost efficacy, influence the operate as normal of hydraulic press.
Therefore, how a kind of hydraulic pressure execution device of hydraulic press is provided, when hydraulic press is worked, keep the plunger rod of hydraulic cylinder not tilt with the inclination of slide block, all the time keep the coaxial line motion with cylinder body, improving the service life and the functional reliability of hydraulic cylinder, thereby guarantee the hydraulic press operate as normal, is the present technical issues that need to address of those skilled in the art.
Summary of the invention
Purpose purport of the present invention when hydraulic press is worked, keeps the coaxial line motion with cylinder body for a kind of hydraulic pressure execution device of hydraulic press is provided all the time, improves the service life and the functional reliability of hydraulic cylinder.In addition, the another object of the present invention purport is for providing a kind of hydraulic press that comprises above-mentioned hydraulic pressure execution device.
For solving the problems of the technologies described above, the invention provides a kind of hydraulic pressure execution device of hydraulic press, comprise hydraulic cylinder, described hydraulic cylinder is fixed on the described hydraulic press by its fixed part, also comprise the slide block that the movable part with described hydraulic cylinder moves up and down, described slide block and described movable part flexibly connect, so that described slide block can rotate around horizontal plane relative to the junction.
Preferably, described movable part is an expansion link, and described slide block and the contact-making surface of described expansion link are provided with protruding ball seat and are connected and are nested in the flange of the outside of described protruding ball seat with described slide block; Described expansion link end face is provided with the ball ring that is nested in described flange inside, and the lower surface of described ball ring is provided with the concave spherical surface that matches with described protruding ball seat, itself and described flange contact facings also are sphere, and the relevant position of described flange also is provided with the face that matches with it.
Preferably, the sphere of described protruding ball seat is provided with oil duct, and the inner passage that described oil duct is formed by described flange and described ball ring is communicated with extraneous.
Preferably, be provided with the press-fit forced filling oil cup in the described inner passage.
Preferably, also be provided with limiting component, the sidewall of described ball ring is provided with the installing hole greater than described limiting component radial dimension, and be provided with the through hole that matches with described limiting component with the sidewall of the corresponding described flange of described installing hole, described limiting component passes the inside that described through hole is arranged at described installing hole.
Preferably, described ball ring is provided with boss with the end face that contacts of described expansion link, and the relevant position of described expansion link is provided with the groove that matches with described boss.
Preferably, described hydraulic cylinder is the plunger hydraulic oil cylinder.
The present invention also provides a kind of hydraulic press, comprises control system and the hydraulic pressure execution device that is connected with described control system, and described hydraulic pressure execution device is above any described hydraulic pressure execution device.
Particularly, described hydraulic press is the large hydraulic press that is provided with a plurality of hydraulic pressure execution devices.
The hydraulic pressure execution device of hydraulic press provided by the invention, comprise hydraulic cylinder, described hydraulic cylinder is fixed on the described hydraulic press by its fixed part, also comprise the slide block that the movable part with described hydraulic cylinder moves up and down, described slide block and described movable the flexible connection are so that described slide block can rotate around horizontal plane relative to the junction.
When hydraulic press is being suppressed in the workpiece process, when the slide block discontinuity, slide block can be around rotating relative to horizontal plane with the junction of the movable part of hydraulic cylinder, thereby the inclination of slide block will can not drive the movable part of connected hydraulic cylinder and rotate together, make the movable part of hydraulic cylinder be in vertical state, avoid increasing the movable part of hydraulic cylinder and the frictional force between fixed part, reduced the abrasion loss of hydraulic cylinder, thereby improved the service life of hydraulic cylinder, simultaneously also avoided the potted component of hydraulic cylinder inside to destroy because of extruding, cause the hydraulic cylinder failure phenomenon, increase the reliability of hydraulic cylinder works.
A kind of preferred embodiment in, described movable part is an expansion link, described slide block and the contact-making surface of described expansion link are provided with protruding ball seat and are connected and are nested in the flange of the outside of described protruding ball seat with described slide block; Described expansion link end face is provided with the ball ring that is nested in described flange inside, and the lower surface of described ball ring is provided with the concave spherical surface that matches with described protruding ball seat, itself and described flange contact facings also are sphere, and the relevant position of described flange also is provided with the face that matches with it.
When hydraulic press is being suppressed in the workpiece process, when the slide block discontinuity, slide block can rotate around the contact-making surface of protruding ball seat and ball ring and the contact-making surface of ball ring and flange.
The hydraulic pressure execution device of said structure, the similar ball-joint of connected mode between slide block and the hydraulic cylinder, slide block can multi-facetedly rotate, and when slide block is horizontal, reliable with being connected of expansion link in the vertical direction, when hydraulic press was in operate as normal, expansion link contacted with slide block reliably, it is reliable to guarantee that pressure transmits, thereby has improved the reliability of hydraulic press work.
Description of drawings
The structural representation of a kind of specific embodiment of the hydraulic pressure execution device of Fig. 1 hydraulic press provided by the present invention;
Fig. 2 is the cutaway view of hydraulic pressure execution device convexity ball seat shown in Figure 1;
Fig. 3 is the vertical view of protruding ball seat shown in Figure 2;
Fig. 4 is the cutaway view of flange in the hydraulic pressure execution device shown in Figure 1;
Fig. 5 is the right side view of flange shown in Figure 4;
Fig. 6 is the cutaway view of ball ring in the hydraulic pressure execution device shown in Figure 1;
Fig. 7 is the right view of ball ring shown in Figure 6.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 1 to Fig. 7:
11 hydraulic cylinders; 111 expansion links; 112 cylinder bodies; 12 slide blocks; 13 protruding ball seats; 131 oil ducts; 14 flanges; 141 through holes; 15 ball rings; 151 concave spherical surfaces; 152 second inner passages; 153 installing holes; 16 fairleads; 17 limiting components; 18 entablatures; 19 press-fit forced filling oil cups.
The specific embodiment
Core purport of the present invention when hydraulic press is worked, keeps the coaxial line motion with cylinder body for a kind of hydraulic pressure execution device of hydraulic press is provided all the time, improves the service life and the functional reliability of hydraulic cylinder.In addition, another core purport of the present invention is for providing a kind of hydraulic press that comprises above-mentioned hydraulic pressure execution device.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 1 is a kind of structural representation of the specific embodiment of the hydraulic pressure execution device of hydraulic press provided by the present invention.
The hydraulic pressure execution device of hydraulic press provided by the invention, comprise hydraulic cylinder 11, hydraulic cylinder 11 comprises fixed part and movable part, hydraulic cylinder is fixed on the described hydraulic press by its fixed part, and fixed part can be the cylinder body 112 of hydraulic cylinder 11, also can be expansion link 111, corresponding movable part can be the expansion link 111 or the cylinder body 112 of hydraulic cylinder, that is to say that hydraulic cylinder 11 can be fixed on the hydraulic press by cylinder body 112, also can be fixed on the hydraulic press by expansion link 111.
This paper is that fixed part is that example is introduced content of the present invention with the cylinder body 112 of hydraulic cylinder 11 mainly; be to be understood that; the present invention includes but be not limited to cylinder body 112 and be the set-up mode of fixed part, the expansion link 111 of hydraulic cylinder 11 is fixed on set-up mode on the hydraulic press also in the protection domain of this paper.
In a kind of specific embodiment, cylinder body 112 can be arranged on the entablature 18 of hydraulic press, and cylinder body 112 exits can be provided with fairlead 16; Hydraulic cylinder can be piston hydraulic cylinder, also can be plunger piston fluid pressure cylinder, as long as no matter which kind of hydraulic cylinder can satisfy hydraulic press operate as normal demand.
Hydraulic pressure execution device also comprises the slide block 12 that the movable part with hydraulic cylinder 11 moves up and down, and slide block 12 flexibly connects with movable part, so that slide block 12 can rotate around horizontal plane relative to the junction.
In the hydraulic pressure execution device provided by the present invention, when hydraulic press is being suppressed in the workpiece process, when slide block 12 discontinuity, slide block 12 can be around rotating relative to horizontal plane with the junction of the movable part of hydraulic cylinder 11, thereby the inclination of slide block 12 will can not drive connected movable part and rotate together, make the movable part of hydraulic cylinder 11 be in vertical state, avoid increasing the movable part of hydraulic cylinder 11 and the frictional force between fixed part, reduce the abrasion loss of the cylinder body of hydraulic cylinder 11, thereby improved the service life of hydraulic cylinder 11, also avoided simultaneously the potted component of hydraulic cylinder 11 inside to tilt to push destroyed because of movable part, cause the hydraulic cylinder failure phenomenon, increase the reliability of hydraulic cylinder 11 work.
It is pointed out that slide block 12 can directly be connected with movable part, also can connect,, realize that technique effect of the present invention gets final product as long as can guarantee the reliability of hydraulic press work by the third party.
Please refer to Fig. 2 to Fig. 4, Fig. 2 is the cutaway view of hydraulic pressure execution device convexity ball seat shown in Figure 1; Fig. 3 is the vertical view of protruding ball seat shown in Figure 2; Fig. 4 is the cutaway view of flange in the hydraulic pressure execution device shown in Figure 1; Fig. 5 is the right side view of flange shown in Figure 4; Fig. 6 is the cutaway view of ball ring in the hydraulic pressure execution device shown in Figure 1; Fig. 7 is the right view of ball ring shown in Figure 6.
In a kind of specific embodiment, the movable part of hydraulic cylinder 11 can be expansion link 111, can be provided with protruding ball seat 13 on the contact-making surface of slide block 12 and expansion link 111, the shape of protruding ball seat 13 is referring to Fig. 2 and shown in Figure 3, the bottom surface of protruding ball seat 13 can be the plane that matches with slide block 12 upper surfaces, to guarantee stability in contact between the two, the spherical that protruding ball seat 13 raises up can be set according to the hydraulic cylinder of lathe and the concrete condition of slide block 12.
Hydraulic pressure execution device can also comprise the flange 14 that is connected and is nested in the outside of protruding ball seat 13 with slide block 12, and concrete shape and structure can be referring to Fig. 4 and Fig. 5, can be connected by bolt between flange 14 and the slide block 12; Can be provided with the ball ring 15 that is nested in flange 14 inside on expansion link 111 end faces, concrete shape and structure can be referring to Fig. 6 and Fig. 7, ball ring 15 can use screw to be connected on the end face of expansion link 111, and the lower surface of ball ring 15 can be provided with the concave spherical surface 151 that matches with protruding ball seat 13, the contact-making surface of itself and flange 14 also is a sphere, and the relevant position of flange 14 also is provided with the face that matches with it.
When hydraulic press is being suppressed in the workpiece process, during slide block 12 discontinuity, slide block 12 can be around the contact-making surface rotation of protruding ball seat 13 with contact-making surface and the ball ring 15 and the flange 14 of ball ring 15, connected mode is away from similar ball-joint, slide block 12 can multi-facetedly rotate, and when slide block 12 is horizontal, reliable with being connected of expansion link 111 in the vertical directions, when hydraulic press is in operate as normal, expansion link 111 contacts with slide block 12 reliably, it is reliable to guarantee that pressure transmits, thereby has improved the reliability of hydraulic press work.
It is to be noted, slide block 12 is not unique with the shape of expansion link 111 contact components, the protruding ball seat 13 that for example is arranged on the slide block 12 can also be the plane for the bottom surface, the upper surface is the recessed ball seat of concave spherical surface, the protruding sphere of face for cooperating with described concave spherical surface that corresponding ball ring 15 is in contact with it; So long as the structure of connector that can realize the technology of the present invention effect is all in the protection domain of this paper.
When slide block 12 rotates relative to expansion link 111, will produce force of sliding friction at the contact-making surface place of two parts, through using for a long time, the contact-making surface of two parts produces loss because of friction easily, reduces the service life of parts.
Please refer to Fig. 3, further, can be provided with oil duct 131 on the sphere of protruding ball seat 13, also be respectively arranged with the inner passage that the connection oil duct 131 and the external world are formed in first inner passage and 152, the first inner passages, second inner passage and second inner passage 152 on flange 14 and the ball ring 15.
When rotating in order to reduce slide block 12, frictional force between the contact-making surface of hydraulic cylinder 11 and 12 liang of parts of slide block, can be after hydraulic press work a period of time, fill lubricating oil by being communicated with extraneous passage to contact-making surface, guarantee to have between two contact-making surfaces reasonable lubricating, and then reduce friction, can reduce the consumption of the material of two parts, prolong the service life of parts, reduce use cost.
Further, can also be provided with press-fit forced filling oil cup 19 in the inner passage,, can make in the oil duct 131 of protruding ball seat 13 and all store lubricating oil constantly, reduce the consumption of lubricating oil to guarantee the injection of lubricating oil, the saving cost, and lubricant effect is relatively good.
Further, hydraulic pressure execution device can also be provided with limiting component 17, limiting component 17 can be pin, also can be double-screw bolt, the sidewall of ball ring 15 is provided with the installing hole 153 greater than the radial dimension of limiting component 17, and is provided with the through hole that matches with limiting component 17 with the sidewall of installing hole 153 corresponding flanges 14, this through hole can be screwed hole, also can be the half-thread hole, also can be unthreaded hole, and limiting component 17 passes through hole adpting flange 14 and ball ring 15.
Being provided with of limiting component 17 can prevent the expansion link rotation, thereby guarantees that lubricating oil can be injected in the oil duct 131 of protruding ball seat 13 smoothly.
Further, ball ring 15 can be provided with boss with contacting on the end face of expansion link 111, and the relevant position of expansion link 111 is provided with the groove that matches with boss.
The structure of boss and groove not only can make things convenient for the assembling of two parts, saves installation time, and has strengthened the reliability of both assemblings.
Particularly, the hydraulic cylinder 11 in the various embodiments described above can be the plunger hydraulic oil cylinder, and expansion link 111 is a plunger rod; The plunger hydraulic cylinder structure is fairly simple, and sealing is reliable.
Need to prove that above-mentioned hydraulic cylinder is not limited to plunger hydraulic oil cylinder above, also can be other forms of hydraulic cylinder, for example telescopic oil cylinder; Certainly can also be the cylinder body 112 of other liquid mediums, should be appreciated that herein hydraulic cylinder is including, but not limited to herein description.
Connected mode between above-mentioned hydraulic cylinder 11 and the slide block 12 can also be for hinged, can on expansion link 111 and slide block 12 hinged seat be set respectively and realize both connection, and this connected mode is fairly simple.
Except that above-mentioned hydraulic pressure execution device, the present invention also provides a kind of hydraulic press, comprises control system and the hydraulic pressure execution device that is connected with described control system, and the hydraulic pressure execution device of this hydraulic press is above each described hydraulic pressure execution device.
Owing to comprised above-described hydraulic pressure execution device, its also corresponding technique effect in this hydraulic press with this hydraulic pressure execution device.
Particularly, above-mentioned hydraulic press can be for being provided with the large hydraulic press of a plurality of hydraulic pressure execution devices.
The technical characterictic of other parts of large hydraulic press can not repeat them here referring to prior art.
More than a kind of hydraulic press provided by the present invention and hydraulic pressure execution device thereof are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (9)
1. the hydraulic pressure execution device of a hydraulic press, comprise hydraulic cylinder (11), described hydraulic cylinder (11) is fixed on the described hydraulic press by its fixed part, also comprise the slide block (12) that the movable part with described hydraulic cylinder (11) moves up and down, it is characterized in that, described slide block (12) flexibly connects with described movable part, so that described slide block (12) can rotate around horizontal plane relative to the junction.
2. the hydraulic pressure execution device of hydraulic press according to claim 1, it is characterized in that, described movable part is expansion link (111), and described slide block (12) and the contact-making surface of described expansion link (111) flange (14) that is provided with protruding ball seat (13) and is connected and is nested in the outside of described protruding ball seat (13) with described slide block (12); The end face of described expansion link (111) is provided with the ball ring (15) of the inside that is nested in described flange (14), and the lower surface of described ball ring (15) is provided with the concave spherical surface (151) that matches with described protruding ball seat (13), the contact-making surface of itself and described flange (14) also is a sphere, and the relevant position of described flange (14) also is provided with the face that matches with it.
3. the hydraulic pressure execution device of hydraulic press according to claim 2, it is characterized in that, the sphere of described protruding ball seat (13) is provided with oil duct (131), and the inner passage that described oil duct (131) is formed by described flange (14) and described ball ring (15) is communicated with extraneous.
4. the hydraulic pressure execution device of hydraulic press according to claim 3 is characterized in that, is provided with press-fit forced filling oil cup (19) in the described inner passage.
5. the hydraulic pressure execution device of hydraulic press according to claim 4, it is characterized in that, also be provided with limiting component (17), the sidewall of described ball ring (15) is provided with the installing hole (153) greater than described limiting component (17) radial dimension, and be provided with the through hole that matches with described limiting component (17) with the sidewall of the corresponding described flange of described installing hole (153) (14), described limiting component (17) passes the inside that described through hole is arranged at described installing hole (153).
6. the hydraulic pressure execution device of hydraulic press according to claim 5, it is characterized in that, described ball ring (15) is provided with boss with the end face that contacts of described expansion link (111), and the relevant position of described expansion link (111) is provided with the groove that matches with described boss.
7. according to the hydraulic pressure execution device of each described hydraulic press of claim 1 to 6, it is characterized in that described hydraulic cylinder (11) is the plunger hydraulic oil cylinder.
8. a hydraulic press comprises control system and the hydraulic pressure execution device that is connected with described control system, it is characterized in that, described hydraulic pressure execution device is each described hydraulic pressure execution device of claim 1 to 7.
9. hydraulic press according to claim 8 is characterized in that, described hydraulic press is the large hydraulic press that is provided with a plurality of hydraulic pressure execution devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100597930A CN102173095A (en) | 2011-03-11 | 2011-03-11 | Hydraulic machine and hydraulic execution device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100597930A CN102173095A (en) | 2011-03-11 | 2011-03-11 | Hydraulic machine and hydraulic execution device thereof |
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| CN102173095A true CN102173095A (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100597930A Pending CN102173095A (en) | 2011-03-11 | 2011-03-11 | Hydraulic machine and hydraulic execution device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104337263A (en) * | 2014-10-24 | 2015-02-11 | 天津市沃琦家具有限公司 | Multifunctional cushion |
| CN114179425A (en) * | 2021-12-08 | 2022-03-15 | 中国第一重型机械股份公司 | Movable beam leveling structure and hydraulic press |
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| EP0399281A2 (en) * | 1989-05-24 | 1990-11-28 | Gräbener Pressensysteme GmbH & Co. KG | Filling device for the automatic filling of the die of powder presses |
| US6318241B1 (en) * | 2000-02-28 | 2001-11-20 | Sauer-Danfoss Inc. | Piston for a hydrostatic cylinder block |
| CN2548793Y (en) * | 2002-06-06 | 2003-05-07 | 叶会祥 | Hydraulic transmission |
| CN1579751A (en) * | 2003-08-13 | 2005-02-16 | 曾田工程技术有限公司 | Mechanical press |
| CN101092981A (en) * | 2007-07-25 | 2007-12-26 | 天津市天锻压力机有限公司 | Anti partial loading oil cylinder in use for large size hydraulic machine |
| CN201404982Y (en) * | 2009-03-10 | 2010-02-17 | 合肥市智丰信息科技有限公司 | Hydraulic press of superplastic forming equipment |
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2011
- 2011-03-11 CN CN2011100597930A patent/CN102173095A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0399281A2 (en) * | 1989-05-24 | 1990-11-28 | Gräbener Pressensysteme GmbH & Co. KG | Filling device for the automatic filling of the die of powder presses |
| US6318241B1 (en) * | 2000-02-28 | 2001-11-20 | Sauer-Danfoss Inc. | Piston for a hydrostatic cylinder block |
| CN2548793Y (en) * | 2002-06-06 | 2003-05-07 | 叶会祥 | Hydraulic transmission |
| CN1579751A (en) * | 2003-08-13 | 2005-02-16 | 曾田工程技术有限公司 | Mechanical press |
| CN101092981A (en) * | 2007-07-25 | 2007-12-26 | 天津市天锻压力机有限公司 | Anti partial loading oil cylinder in use for large size hydraulic machine |
| CN201404982Y (en) * | 2009-03-10 | 2010-02-17 | 合肥市智丰信息科技有限公司 | Hydraulic press of superplastic forming equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104337263A (en) * | 2014-10-24 | 2015-02-11 | 天津市沃琦家具有限公司 | Multifunctional cushion |
| CN114179425A (en) * | 2021-12-08 | 2022-03-15 | 中国第一重型机械股份公司 | Movable beam leveling structure and hydraulic press |
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Application publication date: 20110907 |