CN102794625B - Hydraulic vibration pull pin device - Google Patents
Hydraulic vibration pull pin device Download PDFInfo
- Publication number
- CN102794625B CN102794625B CN201210285573.4A CN201210285573A CN102794625B CN 102794625 B CN102794625 B CN 102794625B CN 201210285573 A CN201210285573 A CN 201210285573A CN 102794625 B CN102794625 B CN 102794625B
- Authority
- CN
- China
- Prior art keywords
- arc groove
- oil
- working hole
- return opening
- cylinder
- 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
- Actuator (AREA)
Abstract
The invention relates to a pull pin device, in particular to a hydraulic vibration pull pin device, and solves the problem of shortage of a special tool for drawing a pin from a mine car body. The hydraulic vibration pull pin device comprises a motor (1), a cock type reversing valve (2), a single rod discharge piston oil cylinder (3), a dual rod discharge piston oil cylinder (4) and a support piece (5), wherein the cock type reversing valve (2) comprises a valve body (20), a cylindrical valve sleeve (21) arranged in the valve body, and a valve core (22) arranged in the valve sleeve (21); a main body of the valve core (22) is a cylinder having a clearance fit with the valve sleeve (21), and first, second and third arc-shaped grooves (100, 200, 300) with arc shapes of inferior arcs are arranged on the upper part of a horizontal axis surface of the cylinder of the valve core (22) from one end to the other end in sequence. The hydraulic vibration pull pin device, provided by the invention, has the advantages of simple structure, reasonable design, convenience for use, and capability of greatly improving the production efficiency.
Description
Technical field
The present invention relates to pin pulling out device, be specially a kind of hydraulic vibration pin pulling out device.
Background technology
The pin of mine car is as a kind of fastening connection piece, insert on the body of mine car, in real work, often need pin to extract from the body of mine car, but pin coordinates with body closely, be not drawn out easily, at present lack again a kind of instrument that pin is extracted from mine car body that is specifically designed to, therefore, be necessary to invent a kind of novel pin pulling out device.
Summary of the invention
The present invention, in order to solve a kind of problem of extracting the instrument of pin from mine car body that is exclusively used in of current shortage, provides a kind of hydraulic vibration pin pulling out device.
The present invention adopts following technical scheme to realize:
A kind of hydraulic vibration pin pulling out device, comprises motor, stopcock formula reversal valve, single rod piston oil-cylinder, two rod piston oil-cylinder, support member.
Described stopcock formula reversal valve comprises valve body, is placed in described valve body, valve pocket cylindraceous and be placed in the spool in described valve pocket, the body of described spool is and the cylinder of described valve pocket matched in clearance that the top of the cylindrical horizontal axial plane of spool passes through and is provided with successively first, second and third arc groove that arc is minor arc, the bottom of the cylindrical horizontal axial plane of spool pass through be provided with successively arc be minor arc fourth, fifth, six arc grooves, described first, second, third and fourth, five, six arc grooves are all about the cylindrical vertical axis face symmetry of axis crossed of spool, each arc groove of the upper face of the horizontal axial plane of cylinder of spool and each arc groove of lower surface spatially position intersect that (the spacer between the spacer between the first arc groove and the second arc groove and the second arc groove and the 3rd arc groove is spatially placed in respectively within the scope of the axial width of the 5th arc groove and the 6th arc groove mutually, correspondingly, spacer between spacer between the 4th arc groove and the 5th arc groove and the 5th arc groove and the 6th arc groove is spatially placed in respectively within the scope of the axial width of the first arc groove and the second arc groove), described valve pocket passes through and connects and have the oil return opening O of the center of circle on described bus successively on the same bus on its surface
1, working hole A, oil inlet P, working hole B, oil return opening O
2, described oil return opening O
1, working hole A, oil inlet P, working hole B, oil return opening O
2mutual alignment should ensure that spool rotates in valve pocket time, the 6th arc groove is by working hole B and oil return opening O
2uNICOM, the 5th arc groove are by oil inlet P and working hole A UNICOM, the 4th arc groove and oil return opening O
1uNICOM, the 3rd arc groove and oil return opening O
2uNICOM, the second arc groove by oil inlet P and working hole B UNICOM, the first arc groove by working hole A and oil return opening O
1uNICOM, the outer wall of described valve pocket coordinates and is fixedly connected with the inwall of described valve body, on described valve body, run through the oil inlet P, working hole A, the working hole B that have with on valve pocket and distinguish corresponding oil-in p, working hole a, working hole b, on valve body, also run through and have oil return opening O, the groove of described oil return opening O by valve interior wall respectively with the oil return opening O of valve pocket
1, oil return opening O
2uNICOM.
One end face of described spool is provided with perpendicular shaft extension; Described shaft extension is connected with the output shaft of described motor.
Working hole a, the working hole b of described stopcock formula reversal valve is connected with two hydraulic fluid ports of described single rod piston oil-cylinder respectively, and the piston rod of described single rod piston oil-cylinder is connected with a piston rod of described pair of rod piston oil-cylinder.
Described support member comprises with porose gripper shoe, described gripper shoe one side is connected with the cylinder body of described pair of rod piston oil-cylinder, another piston rod of described pair of rod piston oil-cylinder is connected (other end of screw rod is threaded with outside pin) through the hole of described gripper shoe and the end face of piston rod with one end of the threaded screw rod of two ends tool by screw thread, the another side of described gripper shoe is evenly equipped with screw, in described screw, be connected with screw rod (while pulling pin, the end face of screw rod is resisted against the surface of external engine body).
When work, the working hole a of stopcock formula reversal valve (being two-position four-way valve) be connected with the rodless cavity of single rod piston oil-cylinder and the hydraulic fluid port of rod chamber respectively with working hole b (or annexation exchange also can, principle is the same), oil-in p is connected with outside oil supply system, oil return opening O and external fuel tank UNICOM.
When specific works, motor-driven valve core rotates in valve pocket, and when Spool rotating to the first working position (upper half-turn as shown in Figure 4), the 6th arc groove is by the working hole B on valve pocket and oil return opening O
2uNICOM, the 5th arc groove are by the oil return opening O on the oil inlet P on valve pocket and working hole A UNICOM, the 4th arc groove and valve pocket
1uNICOM, so correspondingly, the oil-in p of fluid on valve body, the rodless cavity that working hole a enters single rod piston oil-cylinder of outside oil supply system, working hole b, the oil return opening O of fluid in the rod chamber of single rod piston oil-cylinder on valve body passes back into external fuel tank, and then the piston promoting in single rod piston oil-cylinder moves to rod chamber.When Spool rotating to the second working position (lower branch as shown in Figure 5), the oil return opening O on the 3rd arc groove and valve pocket
2uNICOM, the second arc groove by the oil inlet P on valve pocket and working hole B UNICOM, the first arc groove by the working hole A on valve pocket and oil return opening O
1uNICOM; So correspondingly, the oil-in p of fluid on valve body, the rod chamber that working hole b enters single rod piston oil-cylinder of outside oil supply system, working hole a, the oil return opening O of fluid in the rodless cavity of single rod piston oil-cylinder on valve body passes back into external fuel tank, and then the piston promoting in single rod piston oil-cylinder moves to rodless cavity.,, in the time that spool rotates a circle in valve pocket, realize commutation once.In addition, the rotary speed of motor is in 1,000 left and right per minute, accordingly, the spool left and right that also rotates in valve pocket 1,000 times per minute, so, due to the commutation effect of stopcock formula reversal valve, the piston of single rod piston oil-cylinder also can 1,000 left and right of reciprocating motion per minute, and then small size double vibrations is provided, this vibration is delivered on the pin that need to extract by the piston rod of two rod piston oil-cylinders.Then, a hydraulic fluid port oil-feed of two rod piston oil-cylinders, another hydraulic fluid port are fuel-displaced, make the piston of two rod piston oil-cylinders move backward (away from the direction of pin), like this, under the acting in conjunction of the pulling force of two rod piston oil-cylinders and the vibration of single rod piston oil-cylinder, pin is extracted from mine car body.
Based on said process, by mechanical force, pin is extracted rapidly from mine car body, not only time saving and energy saving, and reduced labour intensity, greatly improve production efficiency.
The present invention is simple in structure, reasonable in design, easy to use, efficiently solves a kind of problem of extracting the instrument of pin from mine car body that is exclusively used in of current shortage.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the assembly structure schematic diagram of valve pocket and spool in stopcock formula reversal valve.
Fig. 3 is the right view of Fig. 2.
Fig. 4 is the Spool rotating of Fig. 2 E-E cutaway view during to the first working position.
Fig. 5 is the Spool rotating of Fig. 2 E-E cutaway view during to the second working position.
Fig. 6 is the F-F cutaway view of Fig. 4.
Fig. 7 is the structural representation of valve body in stopcock formula reversal valve.
In figure, 1-motor, 2-stopcock formula reversal valve, the mono-rod piston oil-cylinder of 3-, the two rod piston oil-cylinders of 4-, 5-support member, 10-pin, 11-body, 20-valve body, 21-valve pocket, 22-spool, 23-shaft extension, 100-the first arc groove, 200-the second arc groove, 300-the 3rd arc groove, 400-the 4th arc groove, 500-the 5th arc groove, 600-the 6th arc groove.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.
As shown in Figure 1, a kind of hydraulic vibration pin pulling out device, comprises motor 1, stopcock formula reversal valve 2, single rod piston oil-cylinder 3, two rod piston oil-cylinder 4, support member 5.
Described stopcock formula reversal valve 2 comprises valve body 20, is placed in described valve body 20, valve pocket 21 cylindraceous and be placed in the spool 22 in described valve pocket 21.
As shown in Figure 4,5, 6, the body of described spool 22 is and the cylinder of described valve pocket 21 matched in clearance that the top of the cylindrical horizontal axial plane of spool 22 passes through and is provided with successively first, second and third arc groove 100,200,300 that arc is minor arc; The bottom of the cylindrical horizontal axial plane of spool 22 pass through be provided with successively arc be minor arc fourth, fifth, six arc grooves 400,500,600; Described first, second, third and fourth, five, six arc grooves 100,200,300,400,500,600 are all about the cylindrical vertical axis face symmetry of axis crossed of spool 22; Each arc groove of the upper face of the horizontal axial plane of cylinder of spool 22 and each arc groove of lower surface spatially position intersect that (the spacer between the spacer between the first arc groove 100 and the second arc groove 200 and the second arc groove 200 and the 3rd arc groove 300 is spatially placed in respectively within the scope of the axial width of the 5th arc groove 500 and the 6th arc groove 600 mutually, correspondingly, the spacer between the spacer between the 4th arc groove 400 and the 5th arc groove 500 and the 5th arc groove 500 and the 6th arc groove 600 is spatially placed in respectively within the scope of the axial width of the first arc groove 100 and the second arc groove 200).
As shown in Figure 2, described valve pocket 21 passes through and connects and have the oil return opening O of the center of circle on described bus successively on the same bus on its surface
1, working hole A, oil inlet P, working hole B, oil return opening O
2; In fact, the position of working hole A and working hole B can exchange, and function is the same; In like manner, oil return opening O
1with oil return opening O
2position also can exchange, function is the same.
As shown in Figure 4,5, described oil return opening O
1, working hole A, oil inlet P, working hole B, oil return opening O
2mutual alignment should ensure that spool 22 is in the time of the interior rotation of valve pocket 21, the 6th arc groove 600 is by working hole B and oil return opening O
2uNICOM, the 5th arc groove 500 are by oil inlet P and working hole A UNICOM, the 4th arc groove 400 and oil return opening O
1uNICOM; The 3rd arc groove 300 and oil return opening O
2uNICOM, the second arc groove 200 by oil inlet P and working hole B UNICOM, the first arc groove 100 by working hole A and oil return opening O
1uNICOM.
The outer wall of described valve pocket 21 coordinates and is fixedly connected with the inwall of described valve body 20.
As shown in Figure 7, on described valve body 20, run through the oil inlet P, working hole A, the working hole B that have with on valve pocket 21 and distinguish corresponding oil-in p, working hole a, working hole b, on valve body 20, also run through and have oil return opening O, the groove of described oil return opening O by valve body 20 inwalls respectively with the oil return opening O of valve pocket 21
1, oil return opening O
2uNICOM.
As shown in Figure 2,3, an end face of described spool 22 is provided with perpendicular shaft extension 23; Described shaft extension 23 is connected with the output shaft of described motor 1.
As shown in Figure 1, working hole a, the working hole b of described stopcock formula reversal valve 2 be connected with two hydraulic fluid ports of described single rod piston oil-cylinder 3 respectively (be working hole a, working hole b all can with single rod piston oil-cylinder on the hydraulic fluid port of rod chamber UNICOM or with the hydraulic fluid port UNICOM of rodless cavity UNICOM), the piston rod of described single rod piston oil-cylinder 3 is connected with a piston rod of described pair of rod piston oil-cylinder 4; Described support member 5 comprises with porose gripper shoe, described gripper shoe one side is connected with the cylinder body of described pair of rod piston oil-cylinder 4, another piston rod of described pair of rod piston oil-cylinder 4 is connected with one end of the threaded screw rod of two ends tool by screw thread through the hole of described gripper shoe and the end face of piston rod, the another side of described gripper shoe is evenly equipped with screw, in described screw, is connected with screw rod.
Preferably, in described stopcock formula reversal valve 2, described first and second, the axial width of five, six arc grooves 100,200,500,600 equates, the axial wide of third and fourth arc groove 300,400 equates, and the axial width of the first arc groove 100 is greater than the axial width of the 3rd arc groove 300.When concrete enforcement, the oil inlet P on the valve pocket 21 of stopcock formula reversal valve 2, working hole A, working hole B, oil return opening O
1, oil return opening O
2the center of circle on same straight line and diameter identical.Preferably, the diameter of the oil-in p on valve body 20, working hole a, working hole b, oil return opening O is identical with the diameter of the oil inlet P on valve pocket 21; Oil return opening O can open the optional position on valve body 20, makes the oil return opening O on oil return opening O and valve pocket 21 as long as can realize by the groove of valve body 20 inwalls
1, oil return opening O
2the function of UNICOM.
The piston rod of described single rod piston oil-cylinder 3 can be connected by the threaded screw rod of two ends tool with a piston rod of two rod piston oil-cylinders 4 that (piston rod that is single rod piston oil-cylinder all has screw thread with the end face of the piston rod of pair rod piston oil-cylinders, then connect by the threaded screw rod of two ends tool), also can connect by shaft coupling.Another piston rod of described pair of rod piston oil-cylinder 4 is connected (in the end face of pin, be processed with internal thread, be then connected with the piston rod of two rod piston oil-cylinders by the threaded screw rod of two ends tool) by the threaded screw rod of two ends tool with outside pin 10.The another side of described gripper shoe is evenly equipped with screw, in described screw, is connected with screw rod, and while pulling pin, the end face of screw rod directly or be resisted against the surface of external engine body by liner.
Claims (5)
1. a hydraulic vibration pin pulling out device, is characterized in that: comprise motor (1), stopcock formula reversal valve (2), single rod piston oil-cylinder (3), two rod piston oil-cylinder (4), support member (5);
Described stopcock formula reversal valve (2) comprises valve body (20), is placed in described valve body (20), valve pocket cylindraceous (21) and be placed in the interior spool (22) of described valve pocket (21), the body of described spool (22) is and the cylinder of described valve pocket (21) matched in clearance that the top of the cylindrical horizontal axial plane of spool (22) passes through and is provided with successively first, second and third arc groove that arc is minor arc (100,200,300), the bottom of the cylindrical horizontal axial plane of spool (22) pass through be provided with successively arc be minor arc fourth, fifth, six arc grooves (400,500,600), described first, second, third and fourth, five, six arc grooves (100,200,300,400,500,600) are all about the cylindrical vertical axis face symmetry of axis crossed of spool (22), each arc groove of the upper face of the horizontal axial plane of cylinder of spool (22) and each arc groove of lower surface spatially intersect position mutually, the spacer between the spacer between the first arc groove (100) and the second arc groove (200) and the second arc groove (200) and the 3rd arc groove (300) is spatially placed in respectively within the scope of the axial width of the 5th arc groove (500) and the 6th arc groove (600), correspondingly, spacer between spacer between the 4th arc groove (400) and the 5th arc groove (500) and the 5th arc groove (500) and the 6th arc groove (600) is spatially placed in respectively within the scope of the axial width of the first arc groove (100) and the second arc groove (200), described valve pocket (21) passes through and connects and have the oil return opening O of the center of circle on described bus successively on the same bus on its surface
1, working hole A, oil inlet P, working hole B, oil return opening O
2, described oil return opening O
1, working hole A, oil inlet P, working hole B, oil return opening O
2mutual alignment should ensure that spool (22) rotates in valve pocket (21) time, the 6th arc groove (600) is by working hole B and oil return opening O
2uNICOM, the 5th arc groove (500) are by oil inlet P and working hole A UNICOM, the 4th arc groove (400) and oil return opening O
1uNICOM, the 3rd arc groove (300) and oil return opening O
2uNICOM, the second arc groove (200) by oil inlet P and working hole B UNICOM, the first arc groove (100) by working hole A and oil return opening O
1uNICOM,
The outer wall of described valve pocket (21) coordinates and is fixedly connected with the inwall of described valve body (20), on described valve body (20), run through the oil inlet P, working hole A, the working hole B that have with on valve pocket (21) and distinguish corresponding oil-in p, working hole a, working hole b, on valve body (20), also run through and have oil return opening O, the groove of described oil return opening O by valve body (20) inwall respectively with the oil return opening O of valve pocket (21)
1, oil return opening O
2uNICOM;
One end face of described spool (22) is provided with perpendicular shaft extension (23); Described shaft extension (23) is connected with the output shaft of described motor (1);
Working hole a, the working hole b of described stopcock formula reversal valve (2) is connected with two hydraulic fluid ports of described single rod piston oil-cylinder (3) respectively, and the piston rod of described single rod piston oil-cylinder (3) is connected with a piston rod of described pair of rod piston oil-cylinder (4);
Described support member (5) comprises with porose gripper shoe, described gripper shoe one side is connected with the cylinder body of described pair of rod piston oil-cylinder (4), another piston rod of described pair of rod piston oil-cylinder (4) is connected with one end of the threaded screw rod of two ends tool by screw thread through the hole of described gripper shoe and the end face of piston rod, the another side of described gripper shoe is evenly equipped with screw, in described screw, is connected with screw rod.
2. hydraulic vibration pin pulling out device according to claim 1, it is characterized in that: described first and second, the axial width of five, six arc grooves (100,200,500,600) equates, the axial wide of third and fourth arc groove (300,400) equates, and the axial width of the first arc groove (100) is greater than the axial width of the 3rd arc groove (300).
3. hydraulic vibration pin pulling out device according to claim 1 and 2, is characterized in that: oil inlet P, working hole A, working hole B, oil return opening O on the valve pocket (21) of described stopcock formula reversal valve (2)
1, oil return opening O
2diameter identical; Oil-in p, working hole a on valve body (20), the diameter of working hole b, oil return opening O are identical with the diameter of the oil inlet P on valve pocket (21).
4. hydraulic vibration pin pulling out device according to claim 1 and 2, is characterized in that: the piston rod of described single rod piston oil-cylinder (3) is connected by the threaded screw rod of two ends tool with a piston rod of two rod piston oil-cylinders (4).
5. hydraulic vibration pin pulling out device according to claim 3, is characterized in that: the piston rod of described single rod piston oil-cylinder (3) is connected by the threaded screw rod of two ends tool with a piston rod of two rod piston oil-cylinders (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210285573.4A CN102794625B (en) | 2012-08-13 | 2012-08-13 | Hydraulic vibration pull pin device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210285573.4A CN102794625B (en) | 2012-08-13 | 2012-08-13 | Hydraulic vibration pull pin device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102794625A CN102794625A (en) | 2012-11-28 |
| CN102794625B true CN102794625B (en) | 2014-06-18 |
Family
ID=47194060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210285573.4A Expired - Fee Related CN102794625B (en) | 2012-08-13 | 2012-08-13 | Hydraulic vibration pull pin device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102794625B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5218990A (en) * | 1990-12-11 | 1993-06-15 | Mannesmann Rexroth Gmbh | Multiway valve with piston slide valve |
| CN2183466Y (en) * | 1993-11-26 | 1994-11-23 | 谢晓林 | Rotary valve |
| DE10052613A1 (en) * | 2000-10-24 | 2002-05-08 | Bosch Gmbh Robert | Pin pressing-in device includes device to induce vibrations in pin |
| CN2850803Y (en) * | 2005-12-30 | 2006-12-27 | 潘华 | Automatic pin-drawing machine |
| CN201120541Y (en) * | 2007-11-21 | 2008-09-24 | 石玉东 | Pumping unit horsehead pin extractor |
| CN101858373A (en) * | 2010-06-10 | 2010-10-13 | 浙江工业大学 | High Frequency Electro-hydraulic Flutter Generator |
| CN202137564U (en) * | 2011-05-30 | 2012-02-08 | 泰安力博机电科技有限公司 | Rapping type pin pulling device |
| CN202726433U (en) * | 2012-08-13 | 2013-02-13 | 张耀庭 | Hydraulic vibration pin pulling device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3139634B2 (en) * | 1991-10-19 | 2001-03-05 | マツダ株式会社 | Hydraulic control device |
-
2012
- 2012-08-13 CN CN201210285573.4A patent/CN102794625B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5218990A (en) * | 1990-12-11 | 1993-06-15 | Mannesmann Rexroth Gmbh | Multiway valve with piston slide valve |
| CN2183466Y (en) * | 1993-11-26 | 1994-11-23 | 谢晓林 | Rotary valve |
| DE10052613A1 (en) * | 2000-10-24 | 2002-05-08 | Bosch Gmbh Robert | Pin pressing-in device includes device to induce vibrations in pin |
| CN2850803Y (en) * | 2005-12-30 | 2006-12-27 | 潘华 | Automatic pin-drawing machine |
| CN201120541Y (en) * | 2007-11-21 | 2008-09-24 | 石玉东 | Pumping unit horsehead pin extractor |
| CN101858373A (en) * | 2010-06-10 | 2010-10-13 | 浙江工业大学 | High Frequency Electro-hydraulic Flutter Generator |
| CN202137564U (en) * | 2011-05-30 | 2012-02-08 | 泰安力博机电科技有限公司 | Rapping type pin pulling device |
| CN202726433U (en) * | 2012-08-13 | 2013-02-13 | 张耀庭 | Hydraulic vibration pin pulling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102794625A (en) | 2012-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102072217B (en) | Double-acting automatic pressure increasing valve | |
| WO2016095866A1 (en) | Control valve for pouring color paste in both large amount and small amount | |
| CN203769736U (en) | Double-well mutual balance hydraulic pumping unit hydraulic system | |
| CN204248361U (en) | Large-diameter hydraulic jack dismounting maintenance unit | |
| CN202726433U (en) | Hydraulic vibration pin pulling device | |
| CN203463248U (en) | Double-acting multi-cylinder mud pump directly driven by linear motors | |
| CN102794625B (en) | Hydraulic vibration pull pin device | |
| CN202545414U (en) | Automatic concrete piston retreating buffer throttling device for pumping oil cylinder | |
| CN208268334U (en) | One kind is for lead screw transmission mechanism in numerical control device | |
| CN204147927U (en) | A kind of hydraulic system and roll squeezer | |
| CN202860955U (en) | Two-thimble support structure capable of cleaning threaded central hole | |
| CN205823771U (en) | Lead to rotary reversing valve for 24 | |
| CN205260484U (en) | Integral type pneumatic cylinder with stretch out and draw back and swing function | |
| CN204321572U (en) | Continuous rotation self-centering Hydraulic Clamping Mechanism and hydraulic control system thereof | |
| CN105422065B (en) | A submersible electric reciprocating pump huff and puff oil production device | |
| CN112983905B (en) | A Dual Servo Motor Pump Independent Drive Asymmetric Hydraulic Cylinder Control System | |
| CN219366449U (en) | Electrohydraulic push rod | |
| CN210265312U (en) | Novel two-way hydraulic lock valve body | |
| CN202052950U (en) | Pneumatic thrust electric spindle | |
| CN205370529U (en) | A submersible electric reciprocating pump huff and puff oil production device | |
| CN206590849U (en) | A kind of cylinder hinge arrangement with auto-lock function | |
| CN202359605U (en) | Hydraulic device integrating functions of loading and crushing | |
| CN222415836U (en) | A power transmission mechanism of an electric-driven mud pump | |
| CN216430581U (en) | Large-drift-diameter electric control servo reversing valve driven by single-action servo oil cylinder | |
| CN203098441U (en) | Reversing valve of concrete pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20140618 Termination date: 20180813 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |