CN102555274A - Hydraulic press - Google Patents
Hydraulic press Download PDFInfo
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- CN102555274A CN102555274A CN2011104083673A CN201110408367A CN102555274A CN 102555274 A CN102555274 A CN 102555274A CN 2011104083673 A CN2011104083673 A CN 2011104083673A CN 201110408367 A CN201110408367 A CN 201110408367A CN 102555274 A CN102555274 A CN 102555274A
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Abstract
A hydraulic press is roughly cylindrical, a movable squeezing shaft which is used for squeezing a workpiece is arranged at the front end of the hydraulic press, a movable block capable of moving along with the squeezing shaft is further arranged at the rear end of the squeezing shaft, a fixed block is disposed at the rear end of the movable block, and a limiting ring which prevents the movable block from excessively moving towards the fixed block is arranged between the movable block and the fixed block. Due to the limiting ring which is arranged between the fixed block and the movable block and can prevent the movable block from excessively moving, the movable block is prevented from excessively moving towards the fixed block, and damage to the hydraulic press is avoided.
Description
Technical field
The present invention relates to a kind of hydraulic press, especially refer to the structure of its moving range of hydraulic press limit.
Background technology
In industry was made, hydraulic press was widely used, and it has the output of bigger power, and the part assembly of said hydraulic press can move to realize the butt to product.Said part assembly is provided with a predetermined scope usually, and is excessively mobile but hydraulic press possibly produce, and then can be to himself causing certain injury.
So,, still have further improved space to this type of hydraulic press.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic press that limits himself moving range.
To achieve these goals; The present invention can adopt following technical scheme: a kind of hydraulic press; Roughly cylindrical, its front end is provided with the movably extrusion axis that is used to push workpiece, and said extrusion axis rear end also is provided with a movable block that moves simultaneously with extrusion axis; The movable block rear end is provided with fixed block, is provided with the spacing collar that a restriction movable block excessively moves to fixed block between wherein said movable block and the fixed block.
As further improvement of the present invention, said spacing collar is fixed in movable block.
As further improvement of the present invention, said spacing collar is fixed in fixed block.
As further improvement of the present invention, said spacing collar is circular, is provided with the fixed part that is used to be fixed in fixed block or movable block.
As further improvement of the present invention, said fixed part is provided with the screw that spacing collar is installed on fixed block or movable block.
Beneficial effect of the present invention is following: be provided with between fixed block and the movable block and can limit the spacing collar that movable block excessively moves, avoided movable block to move with respect to the excessive of fixed block, and then avoided the damage of hydraulic press.
Description of drawings
Fig. 1 is the sketch map of security fence of the present invention and board.
Fig. 2 is the sketch map of part assembly of the present invention.
Fig. 3 is the combination sketch map of hydraulic pressure board of the present invention and mounting seat.
Fig. 4 is the schematic perspective view of mounting seat of the present invention and spacing collar.
Fig. 5 is another angle schematic perspective view of mounting seat of the present invention.
Fig. 6 is the schematic perspective view of workpiece shelf of the present invention and clamp assembly.
Fig. 7 is the side view of assembly shown in Figure 6.
Fig. 8 is the schematic perspective view of workpiece shelf of the present invention and clamp assembly middle part subassembly.
Fig. 9 is the schematic perspective view of the upper strata framework of board of the present invention.
The specific embodiment
With reference to figure 1-9, the present invention relates to a kind of board, be used to operate the workpiece 6 on the board.This board mainly comprises three mechanism assemblies, and first mechanism assembly is that 1, the second mechanism assembly of hydraulic pressure board assembly is that workpiece shelf and 4, the three mechanism assemblies of clamp assembly are grip assembly 5.
Said workpiece 6 roughly is shaped as frame, and it is provided with some horizontal cross bars 61, and said workpiece 6 needs through board itself and another workpiece through closing-up, and said workpiece 6 also is provided with side plate 62 at the two ends of cross bar 61.
Said board comprises an installation base plate 14, and above-mentioned three mechanism assemblies all are installed on this installation base plate 14.
Said hydraulic pressure board assembly 1 comprises two hydraulic pressure boards 11 that are installed on workpiece shelf and clamp assembly 4 both sides, and said hydraulic pressure board 11 is used for rivet on 6 two side plates 62 of workpiece and workpiece 6 are carried out riveted.Said hydraulic pressure board 11 comprises two, is arranged at workpiece shelf and clamp assembly 4 both sides respectively, is the first hydraulic pressure board 111 and the second hydraulic pressure board 112.The said first hydraulic pressure board 111 is installed on the installation base plate 14 through one first mounting seat 121 is set; The upper surface of said first mounting seat 121 is provided with cross groove 1211; The lower surface of the said first hydraulic pressure board 111 is provided with and first mounting seat, 121 upper surface cross grooves, 1211 corresponding cross shape grooves 1116; Be provided with bolt piece 1212 in the said cross groove 1116; The height of bolt piece 1212 is higher than the height of the cross groove 1211 of mounting seat, and the upper surface of bolt piece 1212 exceeds the cross groove 1211 of said mounting seat, and its ledge is contained in the cross groove 1116 of said hydraulic press lower surface.Said bolt piece 1212 comprises vertical bolt piece 1213 and horizontal bolt piece 1214 altogether; Wherein a kind of is two; Another kind is one; Vertical bolt piece 1213 is one in the preferred embodiment, and laterally bolt piece 1214 is two, and two horizontal bolt pieces 1214 are arranged at the both sides of vertical bolt piece 1213 respectively.Said bolt piece 1212 is respectively arranged with screw (not label), and passes through bolted-on in first mounting seat 121.Said first mounting seat 121 can't move or adjust after installation base plate 14, the first hydraulic pressure boards 111 are installed through bolt, and promptly the first hydraulic pressure board 111 is a positioning reference.The said second hydraulic pressure board 112 is installed on the opposite side of workpiece shelf and clamp assembly 4; The downside of the second hydraulic pressure board 112 is provided with one second mounting seat 122; This second mounting seat 122 also possesses cross groove 1211, the second hydraulic pressure boards 112 and passes through bolt in this second mounting seat 122.Said second mounting seat 122 bottoms are provided with projection 1215, and said installation base plate 14 is provided with the installation chute 141 corresponding with projection 1215, and said second mounting seat 122 movably is installed on the installation chute 141 of installation base plate 14 through projection 1215.Also be provided with the hydraulic pressure board position-limited rack 131 that restriction hydraulic pressure board 11 excessively moves in the both sides along chute 141 directions are installed of second mounting seat 122; Said hydraulic pressure board position-limited rack 131 is roughly L-shaped; Comprise horizontal side 1311 and vertical side 1312; Horizontal side 1311 in installation base plate 14, vertically is reserved with the gap between the side 1312 and second mounting seat 122 through bolt, and vertically side 1312 also is provided with screwed hole (not shown); Be equiped with the bolt 1314 that prevents that mounting seat from moving in the said screwed hole, said bolt 1314 vertical side 1312 near and/or be provided with the nut 1315 that restriction bolt 1314 moves away from a side of second mounting seat 122.Inwardly tighten or outwards back-out through the bolt 1314 of the aforesaid second hydraulic pressure board 112 both sides; Can adjust the second hydraulic pressure board, the 112 relative first hydraulic pressure boards 111 in the horizontal direction along the position that chute 141 is installed, and then the axle center of two hydraulic pressure boards 11 is adjusted on the same straight line.Its height of pad adjustment can be set between said hydraulic pressure board 11 and the mounting seat 12.The said second hydraulic pressure board 112 can and be installed chute 141 and realize preliminary location calibration through projection 1215; Realize the precision adjustment of the second hydraulic pressure board 112 again through the bolt on the position-limited rack 131 1314; And after adjustment is accomplished; Also can realize the locking of bolt 1314 on position-limited rack 131, prevent the loosening of bolt 1314 through nut set on the bolt 1,314 1315.So far, calibration structure formation that is used to adjust two hydraulic pressure boards 11.
Said hydraulic pressure board 11 is roughly cylindrical, and its front end is provided with extrusion axis 1111, and said extrusion axis 1111 rotates around axis, and can move forward and backward along axis, with the gap between adjustment extrusion axis 1111 and the workpiece 6.Said extrusion axis 1111 is eccentric is arranged at hydraulic pressure board 11, and promptly extrusion axis 1111 is not arranged at axis, and extrusion axis 1111 rear ends also are provided with a movable block 1112, and said movable block 1112 seesaws along axis with extrusion axis 1111 simultaneously.These movable block 1112 rear ends are provided with fixed block 1113, are provided with the gap between the two, can be through movable block 1112 and the mobile realization hydraulic pressure board of extrusion axis 1111 and the extruding of workpiece 6.Also be provided with a spacing collar 1114 between fixed block 1113 and the movable block 1112, said spacing collar 1114 can be fixed in fixed block 1113, also can be fixed in movable block 1112.After spacing collar 1114 is installed, can prevent that the excessive backward mobile hydraulic pressure board 11 that causes of movable block 1112 and extrusion axis 1111 from damaging.Said spacing collar 1114 is circular, and spacing collar 1114 is provided with plurality of fixed portion 1115, on the fixed part 1115 screw is set, and passes screw through screw, spacing collar 1114 is installed on the fixed block 1113 or the movable block 1112 of hydraulic pressure board 11.
Said hydraulic pressure board 11 is connected with hydraulic press 2 through oil pressure pipe 21, and said hydraulic pressure board 11 passes through the hydraulic oil driving of oil pressure pipe 21, and promptly the oil pressure that bears of oil pressure pipe 21 is higher.First end of said oil pressure pipe 21 is locked in hydraulic press 2 through iron chains (not shown), and an end of iron chains is locked in hydraulic press 2, and the other end is locked in the outer set fence 3 of board.If oil pressure pipe 21 produces unexpected, because its first end is connected by the iron chains locking and with fence 3, thus can not get loose or rupture and the high pressure of inherence and whipping significantly because of unexpected, and then can the personnel of periphery not damaged.
Said installation base plate 14 is provided with fixed head 15; Be fixed with guide rail 151 on the said fixed head 15; Guide rail 151 is provided with a lower plywood 16, is fixed with slide block 161 below the lower plywood 16, realizes the slip of lower plywood 16 and fixed head 15 through the slip of said slide block 161 on guide rail 151.Also be disposed with la m 17, upper strata framework 18 on the said lower plywood 16 from the bottom up.Lower plywood 16, la m 17, upper strata framework 18 interfix.
The rear end of said fixed head 15 is equipped with the first rear end cylinder 152, and fixed head 15 is fixed in the rear end of said cylinder level, and front end can promote lower plywood 16 and before and after guide rail 151 is on fixed head 15, move.Also be provided with some sensors on the said fixed head 15, detect displacement and the position of lower plywood 16, and drive the position of the said lower plywood 16 of adjustment through the said first rear end cylinder 152 with respect to fixed head 15.
The rear end of said la m 17 is provided with the second rear end cylinder 171 of level, two rear end vertical cylinders 172 that vertically are provided with, and the said second rear end cylinder 171 rear ends are fixed, and front end can move forward.The lower end hinged securement of said rear end vertical cylinder 172, the upper end is removable.The side of la m 17 is provided with the side cylinder 173 of level, and it interfixes through three L shaped fixed components 174 and is installed on this la m 17, and said L shaped fixed component 174 connects through bolt.Between fixed component 174 and the la m 17, between fixed component 174 and the fixed component 174, be provided with pad (not shown) between fixed component 174 and the side cylinder 173.So far, the height of side cylinder 173 and in the horizontal direction position can be through the pad adjustment, require and can suitably reduce for the design accuracy of side cylinder 173, and installation accuracy can reach higher requirement through the adjustment pad.The end that said side cylinder 173 points to workpiece 6 is provided with cylindrical protrusions (not shown), and the side plate 62 of said workpiece 6 is provided with circular port 620, and cylindrical protrusions and circular port 620 cooperatively interact, and can realize the location to workpiece 6.
The rear end of said la m 17 also is provided with some rotating shaft fixed blocks 175, and said rotating shaft fixed block 175 is fixed in la m 17, and it is provided with V font shelf 1751 and rotating shaft 1752.The rear end holder 176 of a T shape comprises second end 1762 and the 3rd end 1765 of level, also comprises the first vertical end 1761.Its first end 1761 is through this rotating shaft 1752 that is installed on of axle pivot; Second end 1762 is provided with V font grip block 1763; The 3rd end 1765 is connected through the upper end with aforementioned rear end vertical cylinder 172 that an axle pivots; When the upper end of rear end vertical cylinder 172 moved up, the 3rd end 1765 of this rear end holder 176 was headed on the rotating shaft 1752 of fixed block 175 around the shaft and is rotated, and made the V font grip block 1763 of second end 1762 move downward and was held on said workpiece 6.Because the cross bar of workpiece 6 61 is cylindrical; The extension line of the V font groove 1764 of then said V font grip block 1763 and the axis of cylindrical crossbar 61 parallel setting; Two faces of V font grip block 1763 and the cylindrical of cylindrical crossbar 61 are tangent; Then said V font grip block 1763 only has two lines that are parallel to cylindrical crossbar 61 axis to contact with this cylindrical crossbar 61, the more easy tight clamping that realizes workpiece 6, and need not to consider whether grip block 1763 and cylindrical crossbar 61 coincide.Principle is with aforementioned identical, and said V font shelf 1751 is used to put when putting the workpiece with cylindrical crossbar 61, also can locate workpiece 6 rapidly, and need not to consider whether the cylindrical crossbar 61 and the shape of V font shelf 1751 coincide.
The front end of said upper strata framework 18 also is provided with a zigzag front end holder 181; This front end holder 181 also is a lever construction; The one of which end is connected with the movable upper end of being fixed in anterior vertical cylinder, and middle is rotating shaft, and the other end is provided with front end holder 1812; This front end holder 1812 comprises the grip block 1813 of a V font, in order to cooperate with the cylindrical crossbar 61 of workpiece 6.Said front end, rear end holder 1812,176 are arranged at the front end outside and the outside, rear end of workpiece 6 respectively.
Also be provided with some feets 182 on the said upper strata framework 18 corresponding to the position of workpiece 6 ends; Feet 182 is through the dismountable board that is installed on of bolt; Said feet 182 is provided with the depression or protruding 1821 that matches with workpiece 6 shapes; And said feet 182 is arranged at the outside of workpiece 6, when workpiece 6 correct be positioned over said feet 182 time, the placement that workpiece 6 can be stable.Be provided with bed hedgehopping spare 183 between this feet 182 and the upper strata framework 18; Said bed hedgehopping spare 183 is through the removable upper strata framework 18 that is mounted on of bolt; Be provided with metallic gasket between bed hedgehopping spare 183 and the feet 182; Can adjust the height of feet 182, and then realize coincideing closely of feet 182 and workpiece 6.In the specific embodiment, being shaped as of said feet 182 is L shaped, and formed fossaperturate is inwardly towards said workpiece 6, and then workpiece 6 can be held by this fossaperturate, can not slide to the outside of feet 182, be limited in predeterminated position better.
Said workpiece 6 is provided with some horizontal projections 63, and projection 63 set positions are not the front and back symmetries.Position on the next door of feet 182 and shelf corresponding to projection 63 is provided with some sensors; When workpiece 6 is oppositely shelved; Projection 63 on the workpiece 6 can be blocked sensor, and sensor sends processor to after receiving signal, judge this workpiece 6 put misplace the mistake; Can not start processing, avoid workpiece 6 to damage workpiece 6.Workpiece 6 is put and is put when correct, and said sensor can not blocked by workpiece 6, and then the processing of workpiece 6 is normally carried out.
Be provided with two in the said upper strata framework 18 and reply piece 184, be provided with the gap between the said answer piece 184, be defined as first gap; Each is replied piece 184 upper surfaces and is respectively arranged with a female end voussoir 187; Promptly reply piece 184 and be arranged at female lower surface of holding voussoir 187, leave second gap between female end voussoir 187, pass through bolt between female end voussoir 187 and the answer piece 184; The outside of said two female end voussoirs 187 also is fixedly connected with jacking block 188; The arranged outside of said jacking block 188 has fore-set 1881, can be provided with a plurality of fore-sets 1881 on the said jacking block 188, a plurality of positions that need apical grafting of corresponding respectively workpiece 6.The downside of said answer piece 184 is fixed with slide block; Said la m 17 is provided with horizontal guide rail; Said answer piece 184 slides along guide rail horizontal on the la m 17 through the fixing slide block of its downside, and said guide rail and slide block are arranged in the framework of upper strata framework 18.The outside of replying piece 184 also is provided with accommodates depression 1841; The said depression 1841 of accommodating is for cylindrical; This is accommodated in the depression 1841 and contains spring 186; On the upper strata upper surface of framework 18, also be fixed with block 185 corresponding to accommodating depression 1841 position, the inboard of said block 185 is used to block the said other end of accommodating the springs of accommodating 186 in the depression 1841.The inboard correspondence of this block 185 is provided with accommodates depression 1851, and accommodating in the depression 1851 of this block 185 accommodated and be connected to the other end of said spring 186.
Also be provided with a public affairs end voussoir 190 that can move along fore-and-aft direction between first gap of said answer piece 184 and the female end voussoir 187 and second gap; The below of public end voussoir 190 is fixed with slide block; Also be provided with a longitudinal rail 178 on the la m 17 of the below of public end voussoir 190; Said longitudinal rail 178 is arranged on the la m 17; Said public end voussoir 190 links to each other with the removable front end of the aforementioned second rear end cylinder 171, holds voussoir 190 moving forward and backward of guide rail 178 longitudinally through the driving realization public affairs of this second rear end cylinder 171.Be provided with one between the two and regulate bolt 1902, the two is connected, and can adjust gap or the position relation between the two through said adjusting bolt 1902.The front end of said public end voussoir 190 is provided with the lozenges 1901 of guiding usefulness; Said two female end voussoirs 187 are arranged at the both sides of public end voussoir 190; Each female end voussoir 187 rear end also is provided with lozenges 1871 near a side of public affairs end voussoir 190 medial surfaces; The width in said second gap is less than the width of public affairs end voussoir 190, and the width in first gap is greater than the width of public affairs end voussoir 190.When public affairs end voussoir 190 to replying piece 184 and female end voussoir 187 when moving because the width in first gap is greater than the width of public affairs end voussoir 190, can't hold voussoir 190 to produce with public affairs to interfere so reply piece 184; Because the width in second gap is less than the width of public affairs end voussoir 190; So can holding the lozenges 1871 of voussoir 187 to produce with mother, the lozenges 1901 of public end voussoir 190 interferes; Hold voussoir 187 to back down mother through lozenges to both sides; Then reply piece 184 through slide block and guide rail to two side shiftings, block 185 springs 186 of being accommodated in the depression 1841,1851 of accommodating inboard and that reply piece 184 outsides are in compressive state.Fore-set 1881 on the said jacking block 188 withstands said processing work 6 respectively.
Said upper strata framework 18 is a square shape framework, and the slide block guide rail corresponding with it of said answer piece 184 and public end voussoir 190 downsides is contained in the inboard of this framework 18.The upper surface of the both lateral sides of said upper strata framework 18 is provided with and blocks piece 180; Can be connected to this after said female end voussoir 187 is backed down by public affairs end voussoir 190 and block piece 180, promptly this blocks piece 180 and can directly or indirectly be connected to female end voussoir 187, makes the strength effective support of female end voussoir 187; Strength to acting on workpiece 6 has certain limitation; Promptly the excessive slip of the female end of restriction voussoir 187 is avoided strength all to act on workpiece 6, and is caused the infringement of workpiece 6.The said piece 180 that blocks is wholely set with upper strata framework 18.Block the rectangular triangle of piece, one of them right-angle side links to each other with said upper strata framework 18, and another right-angle side is corresponding with female end voussoir 187, promptly holds the direct or indirect butt of voussoir 187 with mother.
The top cover plate 20 that also is provided with of said public end voussoir 190, female end voussoir 187, jacking block 188; Said cover plate 20 blocks on public female end voussoir 187 and jacking block 188; When workpiece 6 is positioned over board, there is said cover plate 20 to block between said workpiece 6 and the voussoir, reduced dust and fallen on the assemblies such as said voussoir and jacking block 188; And do not have between workpiece 6 and the assemblies such as said voussoir and directly contact, avoid the workpiece 6 maybe be the damage of said assembly.Also be provided with pre-determined bit piece (not shown) on the cover plate 20, when workpiece 6 puts down, can interfere with the pre-determined bit piece, pre-determined bit piece guiding workpiece 6 is put to preposition, reduces follow-up manually-operated workload.Said pre-determined bit piece is that plastics are processed.
For the person of ordinary skill of the art, that under instruction of the present invention, is done changes to equivalence of the present invention, must be included in the scope that claim of the present invention advocates.
Claims (5)
1. hydraulic press; Roughly cylindrical; Its front end is provided with the movably extrusion axis that is used to push workpiece; Said extrusion axis rear end also is provided with a movable block that moves simultaneously with extrusion axis, and the movable block rear end is provided with fixed block, it is characterized in that: be provided with the spacing collar that a restriction movable block excessively moves to fixed block between said movable block and the fixed block.
2. hydraulic press as claimed in claim 1 is characterized in that: said spacing collar is fixed in movable block.
3. hydraulic press as claimed in claim 1 is characterized in that: said spacing collar is fixed in fixed block.
4. like any described hydraulic press of claim 1 to 3, it is characterized in that: said spacing collar is provided with the fixed part that is used to be fixed in fixed block or movable block for circular.
5. hydraulic press as claimed in claim 4 is characterized in that: said fixed part is provided with the screw that spacing collar is installed on fixed block or movable block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104083673A CN102555274A (en) | 2011-12-09 | 2011-12-09 | Hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104083673A CN102555274A (en) | 2011-12-09 | 2011-12-09 | Hydraulic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102555274A true CN102555274A (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104083673A Pending CN102555274A (en) | 2011-12-09 | 2011-12-09 | Hydraulic press |
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| Country | Link |
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| CN (1) | CN102555274A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1105727A (en) * | 1966-04-18 | 1968-03-13 | Inst Sverkhtverdykh Mat | Device for protection of power presses against overloads and failures |
| CN2059605U (en) * | 1989-07-04 | 1990-07-25 | 欧阳规 | Hydraulic synchronized stretch assembling die |
| CN1243053A (en) * | 1999-08-12 | 2000-02-02 | 冶金工业部钢铁研究总院 | Method for mfg. of diamond thin-wall drill bit |
| CN2644151Y (en) * | 2003-09-11 | 2004-09-29 | 李海泉 | Barstock hydraulic hot squeezing machine with automatic demoulding function |
| CN201086385Y (en) * | 2007-08-21 | 2008-07-16 | 上海金发科技发展有限公司 | Position limiter of internal splined sleeve for screw extrusion machine |
| CN101377237A (en) * | 2008-10-09 | 2009-03-04 | 济南二机床集团有限公司 | Hydraulic speed regulating device |
| CN101391374A (en) * | 2008-10-17 | 2009-03-25 | 合肥锻压机床有限公司 | A hydraulic press slider travel limit device |
| CN201953886U (en) * | 2010-12-07 | 2011-08-31 | 吕国富 | Damper used for bicycle |
-
2011
- 2011-12-09 CN CN2011104083673A patent/CN102555274A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1105727A (en) * | 1966-04-18 | 1968-03-13 | Inst Sverkhtverdykh Mat | Device for protection of power presses against overloads and failures |
| CN2059605U (en) * | 1989-07-04 | 1990-07-25 | 欧阳规 | Hydraulic synchronized stretch assembling die |
| CN1243053A (en) * | 1999-08-12 | 2000-02-02 | 冶金工业部钢铁研究总院 | Method for mfg. of diamond thin-wall drill bit |
| CN2644151Y (en) * | 2003-09-11 | 2004-09-29 | 李海泉 | Barstock hydraulic hot squeezing machine with automatic demoulding function |
| CN201086385Y (en) * | 2007-08-21 | 2008-07-16 | 上海金发科技发展有限公司 | Position limiter of internal splined sleeve for screw extrusion machine |
| CN101377237A (en) * | 2008-10-09 | 2009-03-04 | 济南二机床集团有限公司 | Hydraulic speed regulating device |
| CN101391374A (en) * | 2008-10-17 | 2009-03-25 | 合肥锻压机床有限公司 | A hydraulic press slider travel limit device |
| CN201953886U (en) * | 2010-12-07 | 2011-08-31 | 吕国富 | Damper used for bicycle |
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Application publication date: 20120711 |