CN202725911U - Full-hydraulic electro-hydraulic hammer - Google Patents
Full-hydraulic electro-hydraulic hammer Download PDFInfo
- Publication number
- CN202725911U CN202725911U CN 201220345045 CN201220345045U CN202725911U CN 202725911 U CN202725911 U CN 202725911U CN 201220345045 CN201220345045 CN 201220345045 CN 201220345045 U CN201220345045 U CN 201220345045U CN 202725911 U CN202725911 U CN 202725911U
- Authority
- CN
- China
- Prior art keywords
- valve
- drive rod
- spool
- communicated
- execution
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Percussive Tools And Related Accessories (AREA)
Abstract
The utility model relates to a full-hydraulic electro-hydraulic hammer, relating to a forging hammer used in forging industry, in particular to a forging hammer hydraulically driven and operated. The invention aims at providing a full-hydraulic electro-hydraulic hammer which can singly examine whether a control valve works normally and more safely before working and in a working process. The full-hydraulic electro-hydraulic hammer comprises a first hydraulic source (1) for driving a hammer rod piston, as well as a second hydraulic source (5) for driving a control valve (2), the control valve (2) comprises a valve body, a follow-up valve is arranged in the valve body in a slidable manner, a valve core is arranged in the follow-up valve in the slidable manner, the follow-up valve comprises a drive rod and an execution valve which are connected with each other, various communication holes and cavities are arranged on the valve body, the follow-up valve and the valve core, the communication paths at two sides of a piston on the drive rod can be changed through changing the position of the valve core relative to the drive rod, the follow-up valve is driven by the second hydraulic source (5) so as to change the position of the execution valve relative to the valve body and further change the communication path of an upper cylinder chamber (31).
Description
Technical field
The utility model relates to the used forging hammer of a kind of forging industry, particularly relates to a kind of forging hammer that utilizes hydraulic-driven and operation.
Background technology
In forging industry, a kind of oil-to-oil electro-hydraulic hammer is arranged at present, it controls conversion between the various hydraulic channels by control valve, thereby utilizes hydraulic operation machinery to carry out work.As application number be 200610114757.9, publication number is CN1986109, be the Chinese invention patent on June 27th, 2007 in open day, a kind of electrohydraulic hammer is disclosed.Application number is 200620008003.0 in addition, publication number is CN2892320, be the Chinese utility model patent on April 25th, 2007 in open day, a kind of hydraulic electrohydraulic hammer is disclosed.The hydraulic power source of drive control valve and the operation of driving hammer stem piston all is to come from same set of hydraulic system in these two patents.After the primer fluid potential source, the hammer stem piston will be subject to the effect of lifting force, and trend and the possibility of motion arranged.No matter whether control valve work this moment is normal, and hammer stem all can be followed according to its state of a control and be made motion feedback.If control valve work is undesired, as clamping stagnation occurs, and this moment, tup was subjected to lifting force to run to top dead centre, then be breakneck, because the clamping stagnation of the machinery especially clamping stagnation of guiding valve is not a stable state, in case the clamping stagnation state variation of the pressure oscillation of hydraulic system or guiding valve probably causes the tup mistake to hit, this is to abstain from the most and fearful situation in the forging hammer production process.
The utility model content
The technical problems to be solved in the utility model provide a kind of can be before work and the course of work in individual inspiration control valve working properly, safer oil-to-oil electro-hydraulic hammer whether.
The utility model oil-to-oil electro-hydraulic hammer, comprise that the first hydraulic power source, control valve and hammer stem drive oil cylinder, hammer stem drives in the oil cylinder and is provided with the hammer stem piston, hammer stem drives oil cylinder and is divided into upper cylinder half chamber and lower cylinder chamber by the hammer stem piston, lower cylinder chamber is communicated to the first hydraulic power source, and control valve comprises valve body, is provided with slidably servo valve in the valve body, be provided with slidably spool in the servo valve, it also comprises the second hydraulic power source;
Be provided with successively from top to bottom on the lateral wall of described valve body and drive liquid outlet, driving inlet, the first execution through hole and the second execution through hole, valve body lower end is provided with the 3rd and carries out through hole;
Described servo valve comprises interconnective drive rod and carries out valve, consists of the servo valve epicoele between the upper surface of drive rod and the valve interior wall, and described driving liquid outlet is communicated to the servo valve epicoele; Consist of drive rod epicoele and drive rod cavity of resorption between piston on the drive rod and the valve interior wall, the long-pending anchor ring greater than downside of the anchor ring of piston upside is long-pending; The drive rod cavity of resorption is communicated with the driving inlet; Be respectively equipped with on the drive rod that is communicated with drive rod inwall and outer wall intercommunicating pore under the intercommunicating pore and drive rod on the drive rod in the up and down both sides of piston, the top of intercommunicating pore is provided with the drive rod connectivity slot of an indent on the drive rod of drive rod inherence;
Described spool is arranged in the described drive rod; One end of spool passes described valve body, and the other end passes described piston; The spool lower end is provided with the spool hollow channel of a lower ending opening, be provided with successively the spool connectivity slot of spool the first intercommunicating pore, spool the second intercommunicating pore and an indent on the lateral wall of spool from top to bottom, spool the first intercommunicating pore is communicated with servo valve epicoele and spool hollow channel; When spool was positioned at an end of drive rod, the drive rod epicoele was communicated to the spool hollow channel by intercommunicating pore, spool connectivity slot, drive rod connectivity slot, spool the second intercommunicating pore on the drive rod successively, and intercommunicating pore is blocked by spool under the drive rod; When spool was positioned at the other end of drive rod, the drive rod cavity of resorption was communicated to the drive rod epicoele by intercommunicating pore on intercommunicating pore, spool connectivity slot, the drive rod under the drive rod successively, and the driven bar of spool the second intercommunicating pore is blocked;
Be performed valve between the outer wall of execution valve and the inwall of valve body and be divided into execution valve epicoele and carry out the valve cavity of resorption, carry out the valve epicoele and be communicated with by the execution valve hollow channel that is arranged in the execution valve with execution valve cavity of resorption; The 3rd carries out through hole is communicated to execution valve cavity of resorption; When the execution valve was positioned at an end of valve body, the first execution through hole was performed valve and blocks, and second carries out through hole is communicated to execution valve cavity of resorption; When the execution valve was positioned at the other end of valve body, the second execution through hole was performed valve and blocks, and first carries out through hole is communicated to the 3rd execution through hole by execution valve epicoele, execution valve hollow channel, execution valve cavity of resorption successively;
Described driving inlet is communicated to described the second hydraulic power source, described driving liquid outlet is communicated to oil drain passage, first carries out through hole is communicated to oil drain passage, and second carries out through hole is communicated to described the first hydraulic power source, and the 3rd carries out through hole is communicated to described upper cylinder half chamber.
The utility model oil-to-oil electro-hydraulic hammer, the diameter of wherein said spool above spool the second intercommunicating pore is less than the diameter at spool the second intercommunicating pore place.
The utility model oil-to-oil electro-hydraulic hammer is connected with buffer unit between wherein said the 3rd execution through hole and the described upper cylinder half chamber, and described buffer unit comprises cushion dashpot, is provided with communicatively successively cushion dashpot inlet, unidirectional valve pocket and plunger shaft in the cushion dashpot; Slidely connect an inner elements of check valve in the unidirectional valve pocket, inner elements of check valve is provided with the small through hole that is communicated with its cut-off both sides; Distance at distance plunger shaft top on the sidewall of plunger shaft is passed through the second liquid channel connection to described cushion dashpot inlet less than the position of the thickness of described hammer stem piston; The corresponding connection with the upper cylinder half chamber of described plunger shaft, described cushion dashpot inlet are communicated to the described the 3rd and carry out through hole.
The utility model oil-to-oil electro-hydraulic hammer difference from prior art is that the utility model oil-to-oil electro-hydraulic hammer adopts two cover hydraulic systems, one cover hydraulic system is used for driving the hammer stem piston, another set of hydraulic system is used for driving servo valve, so just can before work, open separately the hydraulic system that drives servo valve, whether stir spool working properly to check control valve, the mistake that may cause after thereby tup is raised when avoiding only adopting a cover hydraulic system is hit, thereby also safer.The structure of spool, servo valve and the valve body in the utility model oil-to-oil electro-hydraulic hammer is not identical with prior art yet in addition, and its structure that adopts is in order to be applied to two cover hydraulic systems.
Allow the diameter of spool above spool the second intercommunicating pore can make spool that a position limitation is arranged when upwards moving less than the diameter at spool the second intercommunicating pore place in the utility model oil-to-oil electro-hydraulic hammer, compare and do not have this position limitation, the hand of handling spool just can feel spool with respect to the position relationship of servo valve, thereby whether servo valve is working properly in the perception course of work.Carry out to connect between through hole and the upper cylinder half chamber the 3rd in addition buffer unit, the impact that causes in the time of can cushioning the hammer stem backward stroke of the piston are set.
Below in conjunction with accompanying drawing the utility model oil-to-oil electro-hydraulic hammer is described further.
Description of drawings
Fig. 1 is the cutaway view of first embodiment of the utility model oil-to-oil electro-hydraulic hammer;
Fig. 2 is the cutaway view of the control valve that uses among Fig. 1;
Fig. 3 is the partial enlarged drawing at piston position place among Fig. 2;
Fig. 4 is the partial enlarged drawing when spool is positioned at drive rod one end among Fig. 3;
Fig. 5 is the partial enlarged drawing when spool is positioned at the drive rod other end among Fig. 3;
Fig. 6 is provided with the cutaway view that slides when spacing between spool and the drive rod among Fig. 3;
Fig. 7 is the cutaway view when the driving oil cylinder is provided with buffer unit among second embodiment of the utility model oil-to-oil electro-hydraulic hammer.
The specific embodiment
First embodiment of the utility model oil-to-oil electro-hydraulic hammer as shown in Figure 1, driving oil cylinder 3 is arranged in the fuselage, hammer stem piston 4 is arranged on to drive in the oil cylinder 3 and will drive oil cylinder 3 and is divided into upper cylinder half chamber 31 and lower cylinder chamber 32, lower cylinder chamber 32 is by fuselage and channel connection to the first hydraulic power source 1 that drives in the oil cylinder 3,31 tops, upper cylinder half chamber connect control valve 2, and control valve 2 is connected to respectively the second hydraulic power source 5 and oil drain passage; Referring to Fig. 2, control valve 2 comprises valve body 21, is provided with slidably servo valve in the valve body 21, is provided with slidably spool 22 in the servo valve; Servo valve comprises interconnective drive rod 23 and carries out valve 24, consist of servo valve epicoele 25 between the upper surface of drive rod 23 and valve body 21 inwalls, be provided with successively from top to bottom on the lateral wall of valve body 21 and drive liquid outlet 211, driving inlet 212, the first execution through hole 213, the second execution through hole 214, valve body 21 lower ends are provided with the 3rd and carry out through hole 215, drive liquid outlet 211 and are communicated to servo valve epicoele 25; Consist of drive rod epicoele 26 and drive rod cavity of resorption 27 between piston 231 on the drive rod 23 and valve body 21 inwalls, the long-pending anchor ring greater than downside of the anchor ring of piston 231 upsides is long-pending; Drive rod cavity of resorption 27 is communicated with driving inlet 212, referring to Fig. 3, be respectively equipped with intercommunicating pore on the drive rod that is communicated with drive rod inwall and outer wall in the up and down both sides of piston 231 on the drive rod 23,232 and drive rod under intercommunicating pore 233, the top of intercommunicating pore 232 is provided with the drive rod connectivity slot 234 of an indent on the drive rod 23 inherent drive rods; Referring to Fig. 2 and Fig. 3, spool 22 is arranged in the drive rod 23, one end of spool 22 passes valve body 21, the other end passes piston 231, spool 22 lower ends are provided with the spool hollow channel 221 of a lower ending opening, be provided with successively the spool connectivity slot 224 of spool the first intercommunicating pore 222, spool the second intercommunicating pore 223 and an indent on the lateral wall of spool 22 from top to bottom, spool the first intercommunicating pore 222 is communicated with servo valve epicoele 25 and spool hollow channel 221; Referring to Fig. 2, be performed valve 24 between the outer wall of carrying out valve 24 and the inwall of valve body 21 and be divided into and carry out valve epicoele 28 and carry out valve cavity of resorption 29, carry out valve epicoele 28 and carry out valve cavity of resorption 29 and be communicated with by being arranged on the interior execution valve hollow channel 241 of execution valve 24; The 3rd carries out through hole 215 is communicated to execution valve cavity of resorption 29; Referring to Fig. 1., drive inlet 212 and be communicated to the second hydraulic power source 5, drive liquid outlet 211 and be communicated to oil drain passage, first carries out through hole 213 is communicated to oil drain passage, the second execution through hole 214 is communicated to the first hydraulic power source 1, the three execution through hole 215 and is communicated to upper cylinder half chamber 31.Referring to Fig. 4, when spool 22 is positioned at the upper end of drive rod 23, drive rod epicoele 26 is communicated to spool hollow channel 221 by intercommunicating pore on the drive rod 232, spool connectivity slot 224, drive rod connectivity slot 234, spool the second intercommunicating pore 223 successively, and intercommunicating pore 233 is blocked by spool 22 under the drive rod; Referring to Fig. 5, when spool 22 is positioned at the lower end of drive rod 23, drive rod cavity of resorption 27 is communicated to drive rod epicoele 26 by intercommunicating pore 232 on intercommunicating pore under the drive rod 233, spool connectivity slot 224, the drive rod successively, and spool the second intercommunicating pore 223 driven bars 23 are blocked.Referring to Fig. 2, when execution valve 24 was positioned at an end of valve body 21, the first execution through hole 213 was performed valve 24 and blocks, and second carries out through hole 214 is communicated to execution valve cavity of resorption 29; When execution valve 24 was positioned at the other end of valve body 21, the second execution through hole 214 was performed valve 24 and blocks, and first carries out through hole 213 is communicated to the 3rd execution through hole 215 by execution valve epicoele 28, execution valve hollow channel 241, execution valve cavity of resorption 29 successively.
During work, stir the upper end of spool 22 to the drive rod 23, oil drain passage will be successively by driving liquid outlet 211, servo valve epicoele 25, spool the first intercommunicating pore 222, spool hollow channel 221, spool the second intercommunicating pore 223, drive rod connectivity slot 234, spool connectivity slot 224, intercommunicating pore 232 is communicated to drive rod epicoele 26 on the drive rod, and intercommunicating pore 233 is blocked by spool 22 under the drive rod at this moment, it is up that drive rod 23 will drive execution valve 24 this moment, carry out valve 24 up after, the first hydraulic power source 1 will be carried out through hole 214 by second, carry out valve cavity of resorption 29, the 3rd carries out through hole 215 is communicated to upper cylinder half chamber 31, this moment, the hammer stem piston was all connected hydraulic oil in both sides about in the of 4, hammer stem piston 4 because the effective work area in upper cylinder half chamber 31 greater than its effective work area in lower cylinder chamber 32, so hammer stem piston 4 is with descending.When stirring the lower end of spool 22 to the drive rod 23, spool the second intercommunicating pore 223 is blocked driven bar 23, the second hydraulic power source 5 will be communicated to drive rod epicoele 26 by intercommunicating pore 232 on intercommunicating pore 233, spool connectivity slot 224, the drive rod under driving inlet 212, drive rod cavity of resorption 27, the drive rod successively, because the long-pending anchor ring greater than downside of the anchor ring of piston 231 upsides is long-pending, it is descending that drive rod 23 will drive execution valve 23.Carry out valve 24 descending after, oil drain passage will be carried out through hole 215 and be communicated to upper cylinder half chamber 31 by the first execution through hole 213, execution valve epicoele 28, execution valve hollow channel 241, execution valve cavity of resorption the 29, the 3rd, and hammer stem piston 4 is up because of the hydraulic pressure lift power below being subjected at this moment.So move in circles.Can allow the diameter of the diameter of spool 22 above spool the second intercommunicating pore 223 less than spool the second intercommunicating pore 223 places in the present embodiment, referring to Fig. 6, can allow like this spool 22 position limitation be arranged in that drive rod 23 is interior when up, thereby allow the hand of handling spool can feel relative position relation between spool 22 and the drive rod 23, thereby whether servo valve is working properly in the perception course of work.
As shown in Figure 7, second embodiment of the utility model oil-to-oil electro-hydraulic hammer, the difference of itself and first embodiment is to carry out between the through hole 215 in upper cylinder half chamber 31 and the 3rd and is connected with buffer unit, this buffer unit comprises cushion dashpot 61, is provided with communicatively successively cushion dashpot inlet 62, unidirectional valve pocket 63 and plunger shaft 64 in the cushion dashpot 61; Slidely connect an inner elements of check valve 65 in the unidirectional valve pocket 63, inner elements of check valve 65 is provided with the small through hole 651 that is communicated with its cut-off both sides; Be communicated to cushion dashpot inlet 62 less than the position of the thickness of hammer stem piston 4 by second liquid passage 66 in the distance at distance plunger shaft 64 tops on the sidewall of plunger shaft 64; Plunger shaft 64 and the 31 corresponding connections of upper cylinder half chamber, the corresponding recipient place of energy is in plunger shaft 64 interior slips when making 4 backhaul of hammer stem piston, and cushion dashpot inlet 62 is communicated to the 3rd and carries out through hole 215.Like this when hammer stem piston 4 is up, when hammer stem piston 4 does not also arrive the position of second liquid passage 66, liquid mainly flows out from cushion dashpot inlet 62 by second liquid passage 66, during when upper hammer stem piston arrives and above this position, because the distance at plunger shaft 64 tops is arrived less than the thickness of hammer stem piston 4 in this position, second liquid passage 66 will be blocked by hammer stem piston 4, this moment, inner elements of check valve 65 was owing to hammer stem piston 4 upwards pushes the upper end that liquid is in unidirectional valve pocket 63, the check valve that unidirectional valve pocket 63 and inner elements of check valve 65 consist of will be in non-return state, liquid will be extruded from small through hole 651, because small through hole 651 flows are limited, the liquid that is extruded will have a downward reaction force to hammer stem piston 4, thereby hammer stem piston 4 is slowed down, until hammer stem piston 4 arrives plunger shaft 64 tops.This kind buffering method, when hammer stem backward stroke of the piston speed was higher, suffered reaction force was also larger.Afterwards when cushion dashpot inlet 62 logical hydraulic oil, inner elements of check valve 65 moves downward, the check valve conducting, and liquid-driving hammer stem piston 4 is descending, when hammer stem piston 4 is descending when surpassing the position of second liquid passage, liquid additionally promotes upper hammer stem descent of piston by second liquid passage 66.So the effect of this buffer unit is exactly to utilize extruding liquid but not airtight mode cushions when the hammer stem backward stroke of the piston in the present embodiment, when wanting hammer stem piston 4 descending, allows cushion dashpot inlet 62 lead to hydraulic oils and get final product.
Above-described example only is that preferred embodiment of the present utility model is described; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (3)
1. oil-to-oil electro-hydraulic hammer, comprise that the first hydraulic power source (1), control valve (2) and hammer stem drive oil cylinder (3), hammer stem drives in the oil cylinder (3) and is provided with hammer stem piston (4), hammer stem drives oil cylinder (3) and is divided into upper cylinder half chamber (31) and lower cylinder chamber (32) by hammer stem piston (4), lower cylinder chamber (32) is communicated to the first hydraulic power source (1), control valve (2) comprises valve body (21), valve body is provided with servo valve in (21) slidably, be provided with slidably spool (22) in the servo valve, it is characterized in that:
Also comprise the second hydraulic power source (5);
Be provided with successively from top to bottom on the lateral wall of described valve body (21) and drive liquid outlet (211), driving inlet (212), the first execution through hole (213) and the second execution through hole (214), valve body (21) lower end is provided with the 3rd and carries out through hole (215);
Described servo valve comprises interconnective drive rod (23) and carries out valve (24), consist of servo valve epicoele (25) between the upper surface of drive rod (23) and valve body (21) inwall, described driving liquid outlet (211) is communicated to servo valve epicoele (25); Consist of drive rod epicoele (26) and drive rod cavity of resorption (27) between piston (231) on the drive rod (23) and valve body (21) inwall, the long-pending anchor ring greater than downside of the anchor ring of piston (231) upside is long-pending; Drive rod cavity of resorption (27) is communicated with driving inlet (212); Drive rod (23) is upper to be respectively equipped with on the drive rod that is communicated with drive rod inwall and outer wall intercommunicating pore (233) under the intercommunicating pore (232) and drive rod in the up and down both sides of piston (231), the top of intercommunicating pore (232) is provided with the drive rod connectivity slot (234) of an indent on the inherent drive rod of drive rod (23);
Described spool (22) is arranged in the described drive rod (23); One end of spool (22) passes described valve body (21), and the other end passes described piston (231); Spool (22) lower end is provided with the spool hollow channel (221) of a lower ending opening, be provided with successively the spool connectivity slot (224) of spool the first intercommunicating pore (222), spool the second intercommunicating pore (223) and an indent on the lateral wall of spool (22) from top to bottom, spool the first intercommunicating pore (222) is communicated with servo valve epicoele (25) and spool hollow channel (221); When spool (22) is positioned at an end of drive rod (23), drive rod epicoele (26) is communicated to spool hollow channel (221) by intercommunicating pore on the drive rod (232), spool connectivity slot (224), drive rod connectivity slot (234), spool the second intercommunicating pore (223) successively, and intercommunicating pore (233) is blocked by spool (22) under the drive rod; When spool (22) is positioned at the other end of drive rod (23), drive rod cavity of resorption (27) is communicated to drive rod epicoele (26) by intercommunicating pore (232) on intercommunicating pore under the drive rod (233), spool connectivity slot (224), the drive rod successively, and the driven bar of spool the second intercommunicating pore (223) (23) is blocked;
Be performed valve (24) between the outer wall of execution valve (24) and the inwall of valve body (21) and be divided into execution valve epicoele (28) and carry out valve cavity of resorption (29), carry out valve epicoele (28) and be communicated with by being arranged on the interior execution valve hollow channel (241) of execution valve (24) with execution valve cavity of resorption (29); The 3rd carries out through hole (215) is communicated to execution valve cavity of resorption (29); When execution valve (24) was positioned at an end of valve body (21), the first execution through hole (213) was performed valve (24) and blocks, and second carries out through hole (214) is communicated to execution valve cavity of resorption (29); When execution valve (24) is positioned at the other end of valve body (21), the second execution through hole (214) is performed valve (24) and blocks, and first carries out through hole (213) is communicated to the 3rd execution through hole (215) by execution valve epicoele (28), execution valve hollow channel (241), execution valve cavity of resorption (29) successively;
Described driving inlet (212) is communicated to described the second hydraulic power source (5), described driving liquid outlet (211) is communicated to oil drain passage, first carries out through hole (213) is communicated to oil drain passage, second carries out through hole (214) is communicated to described the first hydraulic power source (1), and the 3rd carries out through hole (215) is communicated to described upper cylinder half chamber (31).
2. oil-to-oil electro-hydraulic hammer according to claim 1 is characterized in that: the diameter that described spool (22) is located less than spool the second intercommunicating pore (223) at the diameter of the top of spool the second intercommunicating pore (223).
3. oil-to-oil electro-hydraulic hammer according to claim 1 and 2, it is characterized in that: be connected with buffer unit between described the 3rd execution through hole (215) and the described upper cylinder half chamber (31), described buffer unit comprises cushion dashpot (61), is provided with communicatively successively cushion dashpot inlet (62), unidirectional valve pocket (63) and plunger shaft (64) in the cushion dashpot (61); Slidely connect an inner elements of check valve (65) in the unidirectional valve pocket (63), inner elements of check valve (65) is provided with the small through hole (651) that is communicated with its cut-off both sides; Be communicated to described cushion dashpot inlet (62) less than the position of the thickness of described hammer stem piston (4) by second liquid passage (66) in the distance at distance plunger shaft (64) top on the sidewall of plunger shaft (64); Described plunger shaft (64) and upper cylinder half chamber (31) corresponding connection, described cushion dashpot inlet (62) are communicated to the described the 3rd and carry out through hole (215).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220345045 CN202725911U (en) | 2012-07-16 | 2012-07-16 | Full-hydraulic electro-hydraulic hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220345045 CN202725911U (en) | 2012-07-16 | 2012-07-16 | Full-hydraulic electro-hydraulic hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202725911U true CN202725911U (en) | 2013-02-13 |
Family
ID=47651661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220345045 Expired - Fee Related CN202725911U (en) | 2012-07-16 | 2012-07-16 | Full-hydraulic electro-hydraulic hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202725911U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106457357A (en) * | 2014-03-24 | 2017-02-22 | 赛尔冲击股份公司 | Striking unit and method for material processing by the use of high kinetic energy |
-
2012
- 2012-07-16 CN CN 201220345045 patent/CN202725911U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106457357A (en) * | 2014-03-24 | 2017-02-22 | 赛尔冲击股份公司 | Striking unit and method for material processing by the use of high kinetic energy |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102794379B (en) | Fully-hydraulic counter-blow hammer | |
| CN101776104A (en) | Single-acting plunger type buffering hydraulic oil cylinder | |
| CN202725911U (en) | Full-hydraulic electro-hydraulic hammer | |
| CN102632177B (en) | Cylinder-moving type pressing machine for sleeve cylinder | |
| CN201621130U (en) | Single-acting piston type buffering hydraulic oil cylinder | |
| CN201621129U (en) | Single-acting plunger type buffering hydraulic oil cylinder | |
| CN202725910U (en) | Side master control valve type full-hydraulic electro-hydraulic hammer | |
| CN201575000U (en) | Stroke limit unloading valve for oil cylinder pistons | |
| CN101386092A (en) | Metal band sawing machine feeding hydrocylinder | |
| CN202725912U (en) | Full hydraulic electro-hydraulic hammer | |
| CN104229700A (en) | Device and method for filling container with filling product | |
| CN103909192A (en) | Multidirectional die-forging hydraulic extrusion press | |
| CN203091514U (en) | Pneumatic composite punching die | |
| CN201034094Y (en) | Rapid punching hydraulic cylinder | |
| CN203394920U (en) | Hydraulic cylinder of hydraulic lock system for remote opening and closing of single rope grab | |
| CN204127017U (en) | Pressure limiting hydraulic jack | |
| CN105156389B (en) | A kind of bidirectional relief valve | |
| CN203806907U (en) | Bidirectional hydraulic lift | |
| CN205744667U (en) | A kind of Quick air-discharge system of shock table lift cylinder | |
| CN101021226A (en) | Fast lifting oil pump | |
| CN202971398U (en) | Double-acting type hydraulic cylinder | |
| CN201009224Y (en) | Nailer starting/stopping on-off valve | |
| CN206943107U (en) | Hydraulic press control system | |
| CN201980930U (en) | Hydraulic jack | |
| CN202926740U (en) | Hydraulic locks for hydraulic oil path of large hot upset die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20180716 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |