CN201592974U - Hydraulic support truck - Google Patents
Hydraulic support truck Download PDFInfo
- Publication number
- CN201592974U CN201592974U CN2010201192881U CN201020119288U CN201592974U CN 201592974 U CN201592974 U CN 201592974U CN 2010201192881 U CN2010201192881 U CN 2010201192881U CN 201020119288 U CN201020119288 U CN 201020119288U CN 201592974 U CN201592974 U CN 201592974U
- Authority
- CN
- China
- Prior art keywords
- hydraulic support
- stay cord
- clamping arm
- car body
- truck
- 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
- Jib Cranes (AREA)
Abstract
The utility model discloses a hydraulic support truck belonging to the technical field of hydraulic supports. The hydraulic support truck comprises a hoisting mechanism for hoisting a hydraulic support and a limit device for preventing the hydraulic support from swinging. The limit device comprises a rope and a rope winding mechanism fixed with the truck body of the hydraulic support truck. One end of the rope is connected with the hydraulic support, the other end is connected with the winding end of the rope winding mechanism, and pull force is exerted on the hydraulic support by the rope winding mechanism through winding the rope. As the hydraulic support truck is provided with the limit device capable of preventing the hydraulic support from swinging, and the limit device belongs soft limit, the hydraulic support has high safety and reliability in the transport process.
Description
Technical field
The utility model relates to the hydraulic support technical field, relates in particular to a kind of hydraulic support truck that is used to carry hydraulic support.
Background technology
Hydraulic support is the important component part of colliery fully-mechanized mining equipment, and hydraulic support can reliably and effectively support and the top board of Control work face, ensures the life security of coal miner to greatest extent.
Because load-carrying is big, external structure is irregular, hydraulic support adopts the specific hydraulic bracket carrier that hydraulic support is carried when shifting at a distance usually.In transportation, in order to prevent the rigidity of vehicle body collision of hydraulic support and hydraulic support truck, be typically provided with the derricking gear of lifting hydraulic support in the car body of hydraulic support truck, derricking gear has four elevator chains, the suspension hook of elevator chain is connected with lifting eye on the hydraulic support, and four elevator chains are sling hydraulic support is unsettled.
In the hydraulic support transportation, hydraulic support transport vehicle is in upward slope, descending, starting, braking, when operating mode such as stopping, jolting, bigger rocking can take place in hydraulic support in car body, bigger to the car body impact, when rocking comparatively seriously, hydraulic support is understood directly and car body clashes into, car body and hydraulic support all can produce bigger damage, in case the car body well damage, hydraulic support may drop suddenly, will threaten the safety of hydraulic support truck and operating personal.In order to prevent that hydraulic support from shaking in car body, usually in car body, set up inhibiting device, hydraulic support and car body are tightened to an integral body, inhibiting device can prevent that hydraulic support from shaking in car body, avoid the impact of hydraulic support well, playing very big effect aspect safety, reliability and the service life of improving vehicle car body.
In the prior art, inhibiting device is normal to be adopted by the metal connecting rod of hydraulic ram driving or the structure of push rod, hydraulic ram and car body are fixed, the flexible end of hydraulic ram connects metal connecting rod or push rod, metal connecting rod or push rod against or block hydraulic support, hydraulic ram provides against power or gripping power, and then makes hydraulic support and car body be tightened to an integral body.Because in transportation, vibration that hydraulic support produces and impact more complicated, and being fixed as between the metal connecting rod of hydraulic ram driving or pusher structure and the hydraulic support rigidly fixes, belong to spacing firmly, vibration that hydraulic support produces and impact are very big to the damage of hydraulic ram, make that the reliability of hydraulic ram is lower, lost efficacy easily, hydraulic ram was in case lost efficacy, to make derricking gear will bear bigger burden, even causing derricking gear to rupture, hydraulic support truck can't be worked, and has a strong impact on Coal Production efficient.
And since the metal connecting rod that hydraulic ram drives or the structure of transfer bar mechanism fix, commonality to the hydraulic support of different tonnages, oad is relatively poor, a hydraulic support truck can only be carried specific hydraulic support, makes the range of use of hydraulic support truck be restricted.
The utility model content
The purpose of this utility model provides a kind of hydraulic support truck, this hydraulic support truck has inhibiting device, described inhibiting device can prevent that hydraulic support from shaking, and this inhibiting device is soft spacing, and hydraulic support safety in transportation, reliability are higher.
To achieve these goals, the utility model has improved a kind of hydraulic support truck, comprise the derricking gear that is used to lift by crane hydraulic support, also comprise being used to the inhibiting device that prevents that described hydraulic support from rocking, described inhibiting device comprise stay cord, with the fixing stay cord tightening system of the car body of this hydraulic support truck; One end of described stay cord is connected with described hydraulic support, and the other end is connected with the receipts end of described stay cord tightening system, and described stay cord tightening system applies pulling force by tightening up described stay cord to described hydraulic support.
Preferably, described stay cord tightening system comprise the compressed oil cylinder that is vertical shape substantially and is provided with, with axis of revolution pivotally attached clamping arm; One end of described compressed oil cylinder and the car body of described hydraulic support truck are fixed, the other end is connected with first end of described clamping arm, described stay cord passes second end of described clamping arm, one end of described stay cord is connected with described hydraulic support, and the other end of described stay cord is provided with the stay cord connecting element with described vehicle body upper portion and is connected; The described clamping arm of the telescopic drive of described compressed oil cylinder rotates around described axis of revolution, and described stay cord is tightened with the rotation of described clamping arm or loosened.
Preferably, second end of described clamping arm is provided with through hole, and described stay cord passes this through hole.
Preferably, the bottom of second end of described clamping arm is provided with groove, and described stay cord passes described groove.
Preferably, described stay cord connecting element is a grab.
Preferably, an end of described stay cord is connected with described hydraulic support, is specially, and an end of described stay cord is connected with the lifting eye of described hydraulic support.
Preferably, an end of described stay cord is connected with described hydraulic support, is specially, and an end of described stay cord is connected with the chain sling that rises of described derricking gear.
Preferably, the quantity of described inhibiting device is four, and four described inhibiting device are symmetrical arranged in twos.
Preferably, the elevator that described stay cord tightening system is and described car body is fixed, an end of described stay cord is connected with described hydraulic support, and the other end is connected with the receipts end of elevator.
Preferably, described stay cord is a steel rope.
The hydraulic support truck that the utility model provides comprises being used to the inhibiting device that prevents that hydraulic support from rocking, this inhibiting device comprise stay cord, with the fixing stay cord tightening system of the car body of hydraulic support truck; One end of stay cord is connected with hydraulic support, the other end is connected with the receipts end of described pull rope mechanism, the stay cord tightening system can apply pulling force to hydraulic support by tightening up stay cord, under the effect of this pulling force, the derricking gear that cooperates hydraulic support truck is fixed into the car body of hydraulic support and hydraulic support truck as a whole, can prevent effectively that hydraulic support from shaking in car body.Being connected to of stay cord and hydraulic support flexibly connects, make that the spacing of hydraulic support is soft spacing, in transportation, vibration that hydraulic support truck produces and impact are passed to stay cord tensioner mechanism and car body by stay cord, avoided inhibiting device to contact with the rigidity of hydraulic support, improved the life-span of inhibiting device, safety, the reliability of hydraulic support in transportation is higher, can not influence the efficient of Coal Production because of the hydraulic support truck et out of order.
The length of stay cord and set-up mode all can be adjusted, hydraulic support at different tonnages, different oads, but the mode that is connected and fixed of the length of relative set stay cord and stay cord, the applicable multiple hydraulic support of hydraulic support truck has improved the commonality of hydraulic support truck.
In the preferred version, described stay cord tightening system comprises the compressed oil cylinder that is vertical shape setting substantially, with axis of revolution pivotally attached clamping arm; One end of compressed oil cylinder and the car body of hydraulic support truck are fixed, and the other end is connected with first end of clamping arm, and stay cord passes second end of clamping arm, and an end of stay cord is connected with hydraulic support, and the other end of stay cord is provided with the stay cord connecting element with vehicle body upper portion and is connected; The flexible of described compressed oil cylinder can drive clamping arm wraparound rotating shaft rotation, and described stay cord is tightened with the rotation of clamping arm or loosened, and when tightening, stay cord applies pulling force to hydraulic support.
Hydraulic support is carried out spacing before, one end of stay cord is connected with hydraulic support, compressed oil cylinder is contracted to the shortest position, clamping arm is with the compressed oil cylinder clickwise, make second end of clamping arm be positioned at higher position at vertical direction, this moment, stay cord was in relaxation state, hydraulic support is promoted to suitable height by derricking gear, the other end of stay cord is connected with stay cord anchor fitting on the car body, the piston rod of controlling compressed oil cylinder slowly stretches out, and drives clamping arm wraparound rotating shaft left-hand revolution, makes second end of clamping arm move down at vertical direction, stay cord slowly is tauted, and stay cord will apply pulling force to hydraulic support.
The stay cord tightening system of this structure, compressed oil cylinder stretch out short distance, and stay cord will be tightened up long length, stay cord can be tauted fast, the length change amount of stay cord is bigger, and the scope that the pulling force that hydraulic support is applied is adjustable is bigger, can be with the hydraulic support secure; Compressed oil cylinder is vertical shape setting substantially, the flexible end of compressed oil cylinder drives the structure of rotatable clamping arm, action on the vertical direction of compressed oil cylinder is transferred to the spinning movement of clamping arm, on car body in the narrow space, compressed oil cylinder has been carried out reasonable setting, make larger-size compressed oil cylinder can not exceed the oad of car body, can make full use of space limited on the car body, make that the structure of car body is compact more.
In addition, inhibiting device of the prior art is positioned at the bottom of car body, and the space of car body bottom is narrow and small, and is very inconvenient to the operation of inhibiting device.The utility model is connected an end of stay cord with hydraulic support, the other end is connected with the stay cord connecting element of vehicle body upper portion, hydraulic support need spacing before, only need a end with stay cord be connected and get final product with the stay cord connecting element of vehicle body upper portion; When needs are removed inhibiting device, only need to remove getting final product with the stay cord connecting element bonded assembly stay cord of vehicle body upper portion, operate very convenient.
Description of drawings
Fig. 1 is the structural representation of a kind of specific embodiment of the inhibiting device in the hydraulic support truck provided by the utility model;
Fig. 2 overlooks stressed principle schematic for hydraulic support;
Fig. 3 looks stressed principle schematic for the hydraulic support master;
Fig. 4 is the stressed principle schematic of hydraulic support side-looking;
Wherein, among Fig. 1-Fig. 4:
The specific embodiment
In order to make those skilled in the art better understand the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 1 provides the structural representation of a kind of specific embodiment of the inhibiting device in the hydraulic support truck for the utility model.
As shown in Figure 1, the hydraulic support truck that the utility model provides, comprise derricking gear, derricking gear is used to lift by crane hydraulic support 20, in a kind of specific embodiment, this derricking gear comprises that four are played chain sling 12, and the free end that plays chain sling 12 is provided with the hook that is used to connect hydraulic support, and hook is stuck in the lifting eye 21 of hydraulic support 20.
The hydraulic support truck that the utility model provides also comprises and is used to the inhibiting device that prevents that hydraulic support 20 from rocking, this inhibiting device comprise stay cord 31, with the fixing stay cord tightening system of the car body 10 of hydraulic support truck, one end of stay cord 31 is connected with hydraulic support 20, the other end of stay cord 31 is connected with the receipts end of described stay cord tightening system, and described receipts rope tensioner mechanism applies pulling force by tightening up described stay cord to described hydraulic support.
Under the effect of this pulling force, the derricking gear that stay cord 31 cooperates hydraulic support trucks is fixed into the car body 10 of hydraulic support 20 and hydraulic support truck as a whole, can prevent effectively that hydraulic support 20 from shaking in car body.Stay cord 31 flexibly connects with being connected to of hydraulic support 20, make that the spacing of hydraulic support 20 is soft spacing, in transportation, vibration that hydraulic support truck produces and impact are passed to stay cord tensioner mechanism and car body 10 by stay cord 31, avoided inhibiting device to contact with the rigidity of hydraulic support 20, improved the life-span of inhibiting device, safety, the reliability of hydraulic support in transportation is higher, can not influence the efficient of Coal Production because of the hydraulic support truck et out of order.
The length of stay cord 31 and set-up mode all can be adjusted, hydraulic support at different tonnages, different oads, but the mode that is connected and fixed of the length of relative set stay cord 31 and stay cord 31, the applicable multiple hydraulic support of hydraulic support truck has improved the commonality of hydraulic support truck.
In the preferred version, described inhibiting device is four, and four described inhibiting device two two are symmetrical arranged, and from the four direction of symmetry hydraulic support 20 is applied pulling force, thereby can carry out spacingly at four direction to hydraulic support 20, can prevent effectively that hydraulic support 20 from shaking.
In a kind of specific embodiment, as shown in Figure 1, the stay cord tightening system of described inhibiting device comprises compressed oil cylinder 32, clamping arm 33, compressed oil cylinder 32 is vertical shape setting substantially, compressed oil cylinder 32 also can be certain angle of inclination with car body 10 and be provided with, be positioned at the oad scope of car body 10 as long as can guarantee compressed oil cylinder 32, clamping arm 33 is hinged with axis of revolution 34, but clamping arm 33 wraparound rotating shafts 34 are rotated; One end of compressed oil cylinder 32 and the car body of hydraulic support truck 10 are fixing, the other end is connected with first end of clamping arm 34, stay cord 31 passes second end of clamping arm 34, the second end pivot bush unit of stay cord 31 and clamping arm 34, one end of stay cord 31 is connected with hydraulic support 20, the other end of stay cord 31 is connected with the stay cord connecting element that car body 10 tops are provided with, and in a kind of concrete embodiment, described stay cord connecting element can be for forming the hook 11 of socket with stay cord 31; Compressed oil cylinder 32 flexible can drive clamping arm 33 wraparound rotating shafts 34 and rotate, and stay cord 31 can be tightened or loosens with the rotation of clamping arm 33, and when stay cord 31 was tightened, 31 pairs of hydraulic supports 20 of stay cord applied pulling force.
The stay cord tightening system of this structure, compressed oil cylinder 32 stretch out short distance, and stay cord 31 will be tightened up long length, stay cord 31 can be tauted fast, the length change amount of stay cord 31 is bigger, and the scope that the pulling force that hydraulic support 20 is applied is adjustable is bigger, can be with hydraulic support 20 secure; Compressed oil cylinder 32 is vertical shape setting substantially, the flexible end of compressed oil cylinder 32 drives the structure of rotatable clamping arm 33, action on the vertical direction of compressed oil cylinder 32 is transferred to the spinning movement of clamping arm 33, on car body 10 in the narrow space, compressed oil cylinder 32 has been carried out reasonable setting, make larger-size compressed oil cylinder 32 can not exceed the oad of car body 10, can make full use of space limited on the car body 10, make that the structure of car body 10 is compact more.
In addition, inhibiting device of the prior art is positioned at the bottom of car body, and the space of car body bottom is narrow and small, and is very inconvenient to the operation of inhibiting device.The utility model is connected an end of stay cord 31 with hydraulic support 31, the other end is connected with the stay cord connecting element on car body 10 tops, hydraulic support 20 need spacing before, only need a end with stay cord 31 be connected and get final product with the stay cord connecting element on car body 10 tops; When needs are removed inhibiting device, only need to remove getting final product with the stay cord connecting element bonded assembly stay cord 31 on car body 10 tops, easy to operate.
In a kind of concrete embodiment, stay cord 31 passes second end of clamping arm 33, is specifically as follows, and is provided with through hole at second end of clamping arm 33, and stay cord 31 passes this through hole; Can also for, be provided with groove in the lower end of second end of clamping arm, stay cord 31 passes this groove, is appreciated that stay cord 31 movable situations of passing second end of clamping arm 33 all should be in protection domain of the present utility model.
In a kind of concrete embodiment; stay cord 31 can be directly and hydraulic support 20 direct connections; preferably; under the situation that does not change hydraulic support 20 structures; stay cord 31 can be connected with the lifting eye 21 of hydraulic support 20; if can't fixed pulling rope 31 on the lifting eye 21; as shown in Figure 1; stay cord 31 also can be connected with the chain sling 12 that rises of derricking gear; be connected with hydraulic support 20 indirectly; no matter direct connection is still indirect with hydraulic support 20 to be appreciated that stay cord 31, all should be in protection domain of the present utility model.
The utility model does not limit the set-up mode of stay cord 31, and under the situation that space in car body 10 allows, stay cord 31 can be provided with arbitrarily, as can car body 10 in assembly pulley mechanism can being set, tightens efficient etc. with raising stay cord 31.
In the preferred version, in order to make the suffered pulling force of hydraulic support 20 more reasonable, the direction of pull of 31 pairs of hydraulic supports of stay cord can be oblique direction down, clamping arm 33 can be located at the oblique below of hydraulic support 20 sides particularly.
In the preferred version,, can be provided with four inhibiting device of symmetry in twos, the stressing conditions of hydraulic support 20 in this case be analyzed below in conjunction with accompanying drawing in the outside of hydraulic support 20 for to more firm spacing of hydraulic support 20.
Please referring to Fig. 2, Fig. 3, Fig. 4, Fig. 2 overlooks stressed principle schematic for hydraulic support; Fig. 3 looks stressed principle schematic for the hydraulic support master; Fig. 4 is the stressed principle schematic of hydraulic support side-looking.
As Fig. 2, Fig. 3, shown in Figure 4, four of derricking gear play chain slings and respectively hydraulic support 20 are applied obliquely tensile force f 1, F2, F3, F4, four inhibiting device apply tensile force f 1 ', F2 ', F3 ', F4 ' under oblique to hydraulic support 20 respectively, four rise chain sling and four stay cords can be in all around and above-below direction carry out spacing to hydraulic support 20, make hydraulic support 20 more firmly be fixed as one with vehicle frame 10, safety, the reliability of hydraulic support 20 in transportation is higher.
In the foregoing description; the stay cord tightening system can adapt to narrow space in the car body 10; stay cord tightening system provided by the utility model is not limited to the described structure of the foregoing description; situation in the inside roominess permission; the stay cord tightening system can adopt also that the flexible end of elevator, hydraulic ram directly is connected with stay cord, the flexible end of hydraulic ram is by assembly pulley and modes such as stay cord is connected, and the stay cord tightening system that is appreciated that above-mentioned several structures is all in protection domain of the present utility model.
Stay cord is specifically as follows steel rope, is appreciated that allly to have the flexible connecting member of certain intensity all as the stay cord described in the utility model.
The above only is the description of the preferred implementation of utility model; should be understood that; because the finiteness of literal expression; and objectively have unlimited concrete structure; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. hydraulic support truck, comprise the derricking gear that is used to lift by crane hydraulic support, it is characterized in that, also comprise being used to the inhibiting device that prevents that described hydraulic support from rocking, described inhibiting device comprise stay cord, with the fixing stay cord tightening system of the car body of this hydraulic support truck; One end of described stay cord is connected with described hydraulic support, and the other end is connected with the receipts end of described stay cord tightening system, and described stay cord tightening system applies pulling force by tightening up described stay cord to described hydraulic support.
2. hydraulic support truck according to claim 1 is characterized in that, described stay cord tightening system comprise the compressed oil cylinder that is vertical shape substantially and is provided with, with axis of revolution pivotally attached clamping arm; One end of described compressed oil cylinder and the car body of described hydraulic support truck are fixed, the other end is connected with first end of described clamping arm, described stay cord passes second end of described clamping arm, one end of described stay cord is connected with described hydraulic support, and the other end of described stay cord is provided with the stay cord connecting element with described vehicle body upper portion and is connected; The described clamping arm of the telescopic drive of described compressed oil cylinder rotates around described axis of revolution, and described stay cord is tightened with the rotation of described clamping arm or loosened.
3. hydraulic support truck according to claim 2 is characterized in that, second end of described clamping arm is provided with through hole, and described stay cord passes this through hole.
4. hydraulic support truck according to claim 2 is characterized in that, the bottom of second end of described clamping arm is provided with groove, and described stay cord passes described groove.
5. hydraulic support truck according to claim 2 is characterized in that, described stay cord connecting element is a grab.
6. according to each described hydraulic support truck of claim 1-5, it is characterized in that an end of described stay cord is connected with described hydraulic support, be specially that an end of described stay cord is connected with the lifting eye of described hydraulic support.
7. according to each described hydraulic support truck of claim 1-5, it is characterized in that an end of described stay cord is connected with described hydraulic support, be specially that an end of described stay cord is connected with the chain sling that rises of described derricking gear.
8. hydraulic support truck according to claim 1 is characterized in that, the quantity of described inhibiting device is four, and four described inhibiting device are symmetrical arranged in twos.
9. hydraulic support truck according to claim 1 is characterized in that, the elevator that described stay cord tightening system is and described car body is fixed, and an end of described stay cord is connected with described hydraulic support, and the other end is connected with the receipts end of elevator.
10. hydraulic support truck according to claim 1 is characterized in that, described stay cord is a steel rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201192881U CN201592974U (en) | 2010-02-22 | 2010-02-22 | Hydraulic support truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201192881U CN201592974U (en) | 2010-02-22 | 2010-02-22 | Hydraulic support truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201592974U true CN201592974U (en) | 2010-09-29 |
Family
ID=42775040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201192881U Expired - Fee Related CN201592974U (en) | 2010-02-22 | 2010-02-22 | Hydraulic support truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201592974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792098B (en) * | 2010-02-22 | 2012-12-26 | 三一重型装备有限公司 | Hydraulic support truck |
-
2010
- 2010-02-22 CN CN2010201192881U patent/CN201592974U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792098B (en) * | 2010-02-22 | 2012-12-26 | 三一重型装备有限公司 | Hydraulic support truck |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100436300C (en) | Wire rope reeving support system for cargo container handling gantry cranes | |
| CN101708809B (en) | Reel frame system used for crane | |
| CN101665213B (en) | Light-weight rotary hanger for containers | |
| CN102659036B (en) | Hydraulic hoisting machine for loading and unloading equipment and material in underground coal mine | |
| CN206088813U (en) | Heavy machinery hoists transfer device | |
| CN201587817U (en) | Rotary vehicle-mounted crane with hand winch | |
| CN101289091B (en) | Bottom lifting type arrester | |
| CN101792098B (en) | Hydraulic support truck | |
| CN109279499B (en) | Special self-balancing hanging beam for long object lifting and crane | |
| CN201195671Y (en) | Gravity force type hydraulic crane | |
| CN201592974U (en) | Hydraulic support truck | |
| CN201284195Y (en) | Miniature crane | |
| CN204402555U (en) | Efficient safe mine hydraulic bracket mounting transport vehicle | |
| CN101898719A (en) | Epsilon-type lifting hook device for crane | |
| CN206971859U (en) | A kind of locking, the anti-fall device of multi-storied garage lifting chain | |
| CN201330124Y (en) | Deviation rectification and turning device for sling of crane | |
| CN216583960U (en) | Quick elevating gear of hand hoist | |
| CN102874694B (en) | Hoisting crane and super lifting device thereof | |
| CN202543886U (en) | Detacher and pinrammer connection mechanism | |
| CN103434952A (en) | Super-lift tensioning and locking mechanism and crane | |
| CN107128813A (en) | A kind of crane mechanism used for wind power generation | |
| CN201458566U (en) | Balance mechanism of container light-duty rotary hanger | |
| CN111776926A (en) | Mine cradle replacing device and replacing method thereof | |
| CN114920167B (en) | Auto repair platform that lifts by crane | |
| CN118422995B (en) | Core drilling machine |
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: 20100929 Termination date: 20140222 |