CN201613533U - Cylinder sleeve detaching tool - Google Patents
Cylinder sleeve detaching tool Download PDFInfo
- Publication number
- CN201613533U CN201613533U CN2010203010360U CN201020301036U CN201613533U CN 201613533 U CN201613533 U CN 201613533U CN 2010203010360 U CN2010203010360 U CN 2010203010360U CN 201020301036 U CN201020301036 U CN 201020301036U CN 201613533 U CN201613533 U CN 201613533U
- Authority
- CN
- China
- Prior art keywords
- cylinder sleeve
- pull bar
- extracting tool
- disassembling part
- retaining
- 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
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The utility model provides a cylinder sleeve detaching tool, belongs to the technical field of vehicle maintenance and repair, and solves the problem that cylinder sleeve is damaged easily due to inconvenient detachment of the conventional cylinder sleeve detaching method. The cylinder sleeve detaching tool is used for detaching the cylinder sleeve in interference fit with a casing, and a gap is formed between the inner end part of the cylinder sleeve and the bottom of an inner cavity of the casing; and the cylinder sleeve detaching tool comprises a body and a pull rod, wherein the pull rod can be located inside the cylinder sleeve, the length of the pull rod is larger than that of the cylinder sleeve, the outer end part of the body can be embedded into the edge of the gap, the pull rod is connected with the body through screw threads, and when the body is located at the bottom of the cylinder sleeve, the edge is connected with the body along with the pull rod, stretches outwardly and is embedded into the gap. The cylinder sleeve detaching tool has the advantages of simple structure, convenient use and large detaching force, and can detach the cylinder sleeves of larger sizes and difficulty.
Description
Technical field
The utility model belongs to the auto repair technical field, relates to the extracting tool of a kind of extracting tool, particularly a kind of cylinder sleeve.
Background technology
Cylinder sleeve is exactly the abbreviation of cylinder jacket, and it is set in the cylinder barrel of cylinder body, is divided into dry sleeve and wet sleeve two big classes.The back side does not contact the cylinder jacket of cooling water dry sleeve, and the cylinder jacket that the back side contacts with cooling water is a wet sleeve.Dry sleeve thinner thickness, simple in structure, easy to process.Wet sleeve directly contacts cooling water, so help the cooling of engine, helps the miniaturization and of engine.
The wet sleeve outer surface directly contacts with cooling water for a long time, water temperature is than higher, be easy to generate little bubble, these bubbles can make liner backs produce cavitation and damage, the part that cylinder sleeve contacts with housing is because the infiltration generation corrosion phenomena of cooling water makes cylinder sleeve and housing strike up partnership, and is not quick detachable, and cylinder sleeve is a kind of easily worn part, needs frequent dismounting and change or maintenance.When the cylinder sleeve of dismounting engine, owing to there is not instrument preferably, dismounting is difficulty relatively.Common way is a hammering method, two maintainer's compounding practices, and a staff is taken a long iron staff, and the one end is stretched into the cylinder sleeve lower edge from housing bottom, and another people uses sledgehammer to knock the other end of iron staff, by impulsive force cylinder sleeve is got.After cylinder sleeve stands monolateral impulsive force, bigger distortion having taken place, even if outward appearance is comparatively intact, can not utilize again, if grasp simultaneously badly, also injured housing easily, made cylinder sleeve hold the hole and break, causes housing to damage or scrap.
Chinese patent (Granted publication CN2810902Y) has proposed a kind of multifunctional engine cylinder sleeve puller, comprise puller sleeve pipe, two projected claws, a compression spring, two adjusting levers, double-screw bolt and pressing plates, two projected claws are plugged in respectively in the puller sleeve pipe two ends, puller directly stretches into from the cylinder sleeve top, projected claw fastens the cylinder sleeve bottom, drive the screw rod rising by rotating the rotation nut, thereby cylinder sleeve is pulled out housing.It is laborsaving that this method for dismounting has dismounting, and can not damage the advantage of motor body and cylinder sleeve.But it is bigger to work as the cylinder sleeve diameter, when cooperating tension between cylinder sleeve and the housing, often need very big axial tension cylinder sleeve could be pulled out, the axial tension that this moment, projected claw was subjected to is excessive, pressing plate is produced big pressure, cause pressing plate fracture easily, and rupture easily also in screw rod and pressing plate junction.
Summary of the invention
The purpose of this utility model is to have the problems referred to above at existing technology, has proposed a kind of sound construction, can bear the cylinder sleeve extracting tool of pulling force greatly.
The purpose of this utility model can realize by following technical proposal: a kind of cylinder sleeve extracting tool, be used to dismantle cylinder sleeve with the housing interference fit, has a gap between the bottom of the inner end of cylinder sleeve and housing inner chamber, this extracting tool comprises body and pull bar, described body can place in the cylinder sleeve, the length of described pull bar is greater than the length of cylinder sleeve, the outer end of described body has the retaining edge that can embed above-mentioned gap, it is characterized in that, described pull bar is connected with body by screw thread, when described body placed the bottom of above-mentioned cylinder sleeve, described retaining outwards opened along connecting body along with pull bar and is embedded in the above-mentioned gap.
This cylinder sleeve extracting tool course of work is as follows: body is placed the cylinder sleeve bottom, pull bar is threaded with body, when pull bar is connected with body, the retaining edge is outwards opened and is embedded bottom the cylinder sleeve and the gap between the housing intracavity bottom, thereby make retaining along being fastened on the cylinder sleeve bottom,, drive body end motion outside cylinder sleeve by pull bar is axially applied a pulling force along cylinder sleeve, utilize retaining along the active force of cylinder sleeve bottom is pulled out cylinder sleeve in housing, reach the purpose of dismounting cylinder sleeve.
In above-mentioned a kind of cylinder sleeve extracting tool, described body is made of the identical arc disassembling part of several radiuses, and each disassembling part circumferencial direction is arranged, and disassembling part inside is provided with internal thread, and the outside of described pull bar one end is provided with the external screw thread with screw-internal thread fit.
Body is made of several arc disassembling parts, and each disassembling part circumferencial direction is installed on cylinder sleeve bottom, and in the time of in pull rod screw is connected the hole with internal thread that each disassembling part forms, each arc disassembling part outwards opens, thereby makes retaining along snapping onto the cylinder sleeve bottom.
In above-mentioned a kind of cylinder sleeve extracting tool, described disassembling part is two.Be simple installation, disassembling part is shaped as two semicircular arcs, and two disassembling parts form one can be for the screwed hole of pull rod screw connection.
In above-mentioned a kind of cylinder sleeve extracting tool, the described disassembling part outside is arranged with and is used for the annulus spacing to disassembling part.When each disassembling part is packed the cylinder sleeve bottom respectively into, annulus is enclosed within the disassembling part outside to carry out spacing to disassembling part, when described pull bar is threaded with disassembling part, the disassembling part outside just is resisted against the annulus inner ring, then disassembling part is pressed between annulus and the pull bar, when making the pull bar pulling, can not cause each disassembling part distortion or occurrence positions skew owing to the stress on retaining edge is concentrated.
In above-mentioned a kind of cylinder sleeve extracting tool, the upper end on the described body outside, retaining edge also is installed with the boss of external diameter less than the retaining edge.This boss is used to place annulus on the one hand, the effect rigidity that is to strengthen keeping off the edge on the other hand, and anti-backstop is along stressed excessive and rupture.
In above-mentioned a kind of cylinder sleeve extracting tool, described body comprises tubular connecting portion with internal thread and the snapping portion with opening and closing structure, described retaining is along being arranged in the snapping portion, have the external screw thread with screw-internal thread fit on the described pull bar, described retaining is along being fastened on the cylinder sleeve bottom when described pull bar is plugged in the body.But snapping portion is made up of the structure of the opening and closing of several circle distribution, and pull bar is threaded with connecting portion and when continuing to go deep into, snapping portion is strutted by pull bar, and retaining is along snapping onto the cylinder sleeve bottom.
In above-mentioned a kind of cylinder sleeve extracting tool, described pull bar stretches out cylinder sleeve one end and is provided with a draw-off mechanism.Cylinder sleeve and housing interference fit are pulled out cylinder sleeve and must be used bigger pulling force, thereby stretch out cylinder sleeve one end at pull bar and also be provided with a draw-off mechanism, provide pulling force and enough tractive intensity stably to pull bar.
In above-mentioned a kind of cylinder sleeve extracting tool, described draw-off mechanism comprises external screw thread that is arranged on the pull bar and the rotation nut that cooperates with external screw thread, and described rotation nut shaft is to fixed-site.Because the rotation nut shaft is to fixed-site, thereby when rotating this rotation nut, pull bar moves axially, by rotating cooperating of nut and screw thread, make backward stick action steady, pulling force is big.
In above-mentioned a kind of cylinder sleeve extracting tool, described draw-off mechanism also comprises a support plate, and described rotation nut is arranged on the support plate.Support plate is positioned over a certain place, and the rotation nut is positioned on the support plate, utilizes the axial location of gripper shoe to the rotation nut, makes the rotation nut can only circumferentially rotate to drive pull bar and moves axially.
In above-mentioned a kind of cylinder sleeve extracting tool, be provided with packing ring between described support plate and the rotation nut.Packing ring is arranged between rotation nut and the support plate, reduces to rotate the wearing and tearing between nut and the support plate, also can reduce to rotate the local pressure of nut to support plate.
Compared with prior art, the extracting tool of this cylinder sleeve is simple in structure, and is easy to use, has bigger removal force, detachable relatively large cylinder sleeve and the bigger cylinder sleeve of some dismounting difficulty.
Description of drawings
Fig. 1 is the structural representation of this cylinder sleeve extracting tool.
Fig. 2 is the sectional structure schematic diagram of body in this cylinder sleeve extracting tool.
Fig. 3 is the plan structure schematic diagram of body in this cylinder sleeve extracting tool.
Fig. 4 is the cross-sectional schematic of the another kind of structure of body in this cylinder sleeve extracting tool.
Fig. 5 is the vertical view of the another kind of structure of body in this cylinder sleeve extracting tool.
Among the figure, 1, housing; 2, cylinder sleeve; 3, body; 30, disassembling part; 31, retaining edge; 32, boss; 4, pull bar; 5, gap; 6, annulus; 7, nut; 8, support plate; 9, packing ring.
The specific embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
As shown in Figure 1, this cylinder sleeve extracting tool is used to dismantle clutch cylinder sleeve, range piston cylinder sleeve, cylinder sleeve of engine etc., and cylinder sleeve 2 is installed on inner chamber and the cylinder sleeve 2 and housing 1 interference fit of housing 1, has a gap 5 between the bottom of cylinder sleeve 2 and housing 1 inner chamber.
This extracting tool comprises body 3 and pull bar 4, body 3 can place in the cylinder sleeve 2, the length of pull bar 4 is greater than the length of cylinder sleeve 2, the outer end of body 3 have can embed gap 5 between cylinder sleeve 2 housings 1 intracavity bottom retaining along 31, pull bar 4 is connected with body 3 by screw thread, when body 3 places the bottom of above-mentioned cylinder sleeve 2, the retaining of body 3 along 31 along with pull bar 4 connects bodies 3 and outwards opens and be embedded in the above-mentioned gap 5.
As shown in Figures 2 and 3, body 3 is made of two identical arc disassembling parts 30 of radius, disassembling part 30 inner rings are provided with internal thread, two disassembling parts 30 combine and can form one one-tenth screwed hole that can supply pull bar 4 to peg graft, the outside of pull bar 4 one ends is provided with the external screw thread with above-mentioned screw-internal thread fit, when being threaded with disassembling part 30 of pull bar 4, two arc disassembling parts 30 outwards open, thereby make retaining snap onto cylinder sleeve 2 bottoms along 31.
When this extracting tool is used to dismantle cylinder sleeve 2, only keep off along 31 pairs of cylinder sleeves 2 and exerting pressure, cause body 3 to be subjected to force unbalance easily, skew or distortion take place in disassembling part 30 positions, for preventing the generation of above-mentioned situation, this extracting tool is arranged with in the outside of disassembling part 30 and is used for the annulus 6 spacing to disassembling part 30.When each disassembling part 30 is respectively charged into cylinder sleeve 2 bottoms, annulus 6 is enclosed within disassembling part 30 outsides to carry out spacing to disassembling part 30, when described pull bar 4 is threaded with disassembling part 30, disassembling part 30 outsides just are resisted against annulus 6 inner rings, then disassembling part 30 is pressed between annulus 6 and the pull bar 4, when making pull bar 4 pullings, can be owing to retaining is offset along concentrated disassembling part 30 distortion or the occurrence positions of causing of 31 stress.Simultaneously, retaining also is installed with an external diameter less than the boss 32 of retaining along 31 along 31 upper end.This boss 32 is used to place annulus 6 on the one hand, is used to strengthen the rigidity of retaining along 31 on the other hand, and anti-backstop is stressed excessive and rupture along 31.According to actual conditions, at some relatively large cylinder sleeves 2, for the purpose of economical with materials, body 3 can be arranged to structure as shown in Figure 4 and Figure 5, this moment, pull bar 4 was still applicable with annulus 6.
Because cylinder sleeve 2 and housing 1 interference fit, cylinder sleeve 2 is pulled out the necessary bigger pulling force that uses, especially cooperate the situation of tension for some large-scale cylinder sleeves 2 or because of cylinder sleeve 2 gets rusty, common pulling force far can not be pulled out cylinder sleeve 2, thereby this extracting tool stretches out cylinder sleeve 2 one ends at pull bar 4 and also is provided with a draw-off mechanism, pull bar 4 is provided pulling force and enough tractive intensity stably.This draw-off mechanism comprises that being arranged at pull bar 4 stretches out the external screw thread of cylinder sleeve 2 one ends and the rotation nut 7 that cooperates with external screw thread, and rotation nut 7 is positioned on the support plate 8.Because rotation nut 7 axial locations are fixed, thereby when rotating this rotation nut 7, pull bar 4 moves to cylinder sleeve 2 axial outward directions, reaches the purpose of pulling out cylinder sleeve 2.Long-term friction produces wearing and tearing between nut 7 and the support plate 8 in order to prevent to rotate, and also is provided with a packing ring 9 between support plate 8 and rotation nut 7, and packing ring 9 radiuses also can reach the effect that reduces to rotate 7 pairs of support plate 8 local pressures of nut greater than rotation nut 7 radiuses.
This cylinder sleeve extracting tool course of work is as follows: disassembling part 30 is placed cylinder sleeve 2 bottoms, and annulus 6 is set in disassembling part 30 outsides, then pull bar 4 one ends are stretched into cylinder sleeve 2 and be threaded with disassembling part 30, when pull bar 4 is connected with disassembling part 30, disassembling part 30 outwards opens and makes retaining along 31 gaps 5 that embed between cylinder sleeve 2 bottoms and housing 1 intracavity bottom, thereby makes retaining be fastened on cylinder sleeve 2 bottoms along 31.By rotating rotation nut 7, making rotation nut 7 drive pull bar 4 moves along cylinder sleeve 2 axial outward directions, outwards move thereby drive disassembling part 30, utilize retaining cylinder sleeve 2 to be pulled out in housing 1, reach the purpose of dismounting cylinder sleeve 2 along the active force of 31 pairs of cylinder sleeve 2 bottoms.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper used morely housing 1, cylinder sleeve 2, body 3, disassembling part 30, retaining along 31, terms such as boss 32, pull bar 4, gap 5, annulus 6, nut 7, support plate 8, packing ring 9, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.
Claims (10)
1. cylinder sleeve extracting tool, the cylinder sleeve (2) that is used for dismounting and housing (1) interference fit, has a gap (5) between the bottom of the inner end of cylinder sleeve (2) and housing (1) inner chamber, this extracting tool comprises body (3) and pull bar (4), described body (3) can place in the cylinder sleeve (2), the length of described pull bar (4) is greater than the length of cylinder sleeve (2), the outer end of described body (3) has the retaining edge (31) that can embed above-mentioned gap (5), it is characterized in that, described pull bar (4) is connected with body (3) by screw thread, when described body (3) placed the bottom of above-mentioned cylinder sleeve (2), described retaining edge (31) was outwards opened along with pull bar (4) connection body (3) and is embedded in the above-mentioned gap (5).
2. a kind of cylinder sleeve extracting tool according to claim 1, it is characterized in that, described body (3) is made of the identical arc disassembling part (30) of several radiuses, each disassembling part (30) circumferencial direction is arranged, disassembling part (30) inside is provided with internal thread, and the outside of described pull bar (4) one ends is provided with the external screw thread with screw-internal thread fit.
3. a kind of cylinder sleeve extracting tool according to claim 2 is characterized in that described disassembling part (30) is two.
4. according to claim 1 or 2 or 3 described a kind of cylinder sleeve extracting tools, it is characterized in that described disassembling part (30) outside is arranged with and is used for the annulus (6) spacing to disassembling part (30).
5. according to claim 1 or 2 or 3 described a kind of cylinder sleeve extracting tools, it is characterized in that described body (3) outside, retaining also are installed with external diameter less than the boss (32) of retaining along (31) along the upper end of (31).
6. a kind of cylinder sleeve extracting tool according to claim 1, it is characterized in that, described body (3) comprises tubular connecting portion with internal thread and the snapping portion with opening and closing structure, described retaining is arranged in the snapping portion along (31), have the external screw thread with screw-internal thread fit on the described pull bar (4), described retaining is fastened on cylinder sleeve (2) bottom along (31) in the time of in described pull bar (4) is plugged on body (3).
7. according to claim 1 or 2 or 3 or 6 described a kind of cylinder sleeve extracting tools, it is characterized in that described pull bar (4) stretches out cylinder sleeve (2) one ends and is provided with a draw-off mechanism.
8. a kind of cylinder sleeve extracting tool according to claim 7 is characterized in that, described draw-off mechanism comprises the rotation nut (7) that is arranged at the external screw thread on the pull bar (4) and cooperates with external screw thread, and described rotation nut (7) axial location is fixed.
9. a kind of cylinder sleeve extracting tool according to claim 8 is characterized in that described draw-off mechanism also comprises a support plate (8), and described rotation nut (7) is arranged on the support plate (8).
10. a kind of cylinder sleeve extracting tool according to claim 9 is characterized in that, is provided with packing ring (9) between described support plate (8) and the rotation nut (7).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010203010360U CN201613533U (en) | 2010-01-19 | 2010-01-19 | Cylinder sleeve detaching tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010203010360U CN201613533U (en) | 2010-01-19 | 2010-01-19 | Cylinder sleeve detaching tool |
Publications (1)
Publication Number | Publication Date |
---|---|
CN201613533U true CN201613533U (en) | 2010-10-27 |
Family
ID=42999905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2010203010360U Expired - Fee Related CN201613533U (en) | 2010-01-19 | 2010-01-19 | Cylinder sleeve detaching tool |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN201613533U (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102886759A (en) * | 2012-09-21 | 2013-01-23 | 西安飞机工业(集团)有限责任公司 | Method for quickly removing oppositely installed flange bushings |
CN104339305A (en) * | 2014-09-10 | 2015-02-11 | 安徽江淮汽车股份有限公司 | Pull-out assistant jig for gear shifting piston cylinder sleeve |
CN105200875A (en) * | 2015-08-24 | 2015-12-30 | 河南高达铁路机械设备有限公司 | Multifunctional extractor for GLC turnout eccentric sleeve |
CN109623727A (en) * | 2019-02-19 | 2019-04-16 | 三门核电有限公司 | A kind of cutting ferrule dismounting tooling |
CN111346943A (en) * | 2020-03-18 | 2020-06-30 | 中冶陕压重工设备有限公司 | Winding drum supporting head and disassembling method thereof |
CN111745588A (en) * | 2020-08-03 | 2020-10-09 | 广西玉柴机器股份有限公司 | Pulling-out tool for composite cylinder cover cylinder sleeve |
CN114290278A (en) * | 2021-12-14 | 2022-04-08 | 海洋石油工程股份有限公司 | Seal ring dismounting tool |
-
2010
- 2010-01-19 CN CN2010203010360U patent/CN201613533U/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102886759A (en) * | 2012-09-21 | 2013-01-23 | 西安飞机工业(集团)有限责任公司 | Method for quickly removing oppositely installed flange bushings |
CN104339305A (en) * | 2014-09-10 | 2015-02-11 | 安徽江淮汽车股份有限公司 | Pull-out assistant jig for gear shifting piston cylinder sleeve |
CN104339305B (en) * | 2014-09-10 | 2016-03-30 | 安徽江淮汽车股份有限公司 | Range piston cylinder sleeve pull-out accessory |
CN105200875A (en) * | 2015-08-24 | 2015-12-30 | 河南高达铁路机械设备有限公司 | Multifunctional extractor for GLC turnout eccentric sleeve |
CN105200875B (en) * | 2015-08-24 | 2017-01-18 | 河南高达铁路机械设备有限公司 | Multifunctional extractor for GLC turnout eccentric sleeve |
CN109623727A (en) * | 2019-02-19 | 2019-04-16 | 三门核电有限公司 | A kind of cutting ferrule dismounting tooling |
CN111346943A (en) * | 2020-03-18 | 2020-06-30 | 中冶陕压重工设备有限公司 | Winding drum supporting head and disassembling method thereof |
CN111346943B (en) * | 2020-03-18 | 2021-06-29 | 中冶陕压重工设备有限公司 | Winding drum supporting head and disassembling method thereof |
CN111745588A (en) * | 2020-08-03 | 2020-10-09 | 广西玉柴机器股份有限公司 | Pulling-out tool for composite cylinder cover cylinder sleeve |
CN114290278A (en) * | 2021-12-14 | 2022-04-08 | 海洋石油工程股份有限公司 | Seal ring dismounting tool |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN201613533U (en) | Cylinder sleeve detaching tool | |
CN205630464U (en) | Extracting tool of box coupling | |
CN201291437Y (en) | Diamond bit mould draw-off gear | |
CN204729450U (en) | The antitheft assembly of a kind of threaded fastener totally enclosed type | |
CN208514424U (en) | A kind of bearing dismounting tool of blower fan main shaft | |
CN201208735Y (en) | Motor fan dismounting tool | |
CN202015927U (en) | Bearing disassembly combined device | |
CN107269667B (en) | Motor anti-theft bolt and dismantling tool thereof | |
CN105328437A (en) | Planetary gear bearing disassembling tooling | |
CN209725593U (en) | A kind of plug | |
CN210819362U (en) | Engine crankshaft bearing cap extracting tool | |
CN201040371Y (en) | Special-purpose tool for dismounting cone crusher body lining | |
CN204844043U (en) | Self -control bolt and vapour that adopts this bolt are repaiied clutch and are installed maintenance frock fast | |
CN201824312U (en) | Differential mechanism double-sided oil seal installation tool | |
CN203831817U (en) | Efficient oil press and oil pressing assembly of efficient oil press | |
CN109595424A (en) | A kind of plug | |
CN202579689U (en) | Hydraulic close fit bolt | |
CN207044108U (en) | A kind of dismounting component for taper bolt | |
CN2765729Y (en) | Screw disassembling wrench | |
CN201385287Y (en) | Draw-type detacher | |
CN219692244U (en) | Piston | |
CN102352728A (en) | Drilling tool adapter | |
CN202318170U (en) | Motor belt pulley assembling and disassembling device | |
CN204686772U (en) | A kind of detaching device for coupling | |
CN209062499U (en) | Device for separating connecting rod and crank of oil pumping unit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101027 Termination date: 20140119 |