CN203778680U - Claw beam structure of charging and discharging machine for forging with telescopic and rotary functions - Google Patents

Claw beam structure of charging and discharging machine for forging with telescopic and rotary functions Download PDF

Info

Publication number
CN203778680U
CN203778680U CN201420179691.1U CN201420179691U CN203778680U CN 203778680 U CN203778680 U CN 203778680U CN 201420179691 U CN201420179691 U CN 201420179691U CN 203778680 U CN203778680 U CN 203778680U
Authority
CN
China
Prior art keywords
hollow shaft
claw beam
square tube
pull bar
flexible
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 - Lifetime
Application number
CN201420179691.1U
Other languages
Chinese (zh)
Inventor
柏民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Rongsheng Heavy Machinery Co ltd
Original Assignee
ZHANGQIU RONGSHENG FORGING AND PRESSING Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZHANGQIU RONGSHENG FORGING AND PRESSING Co Ltd filed Critical ZHANGQIU RONGSHENG FORGING AND PRESSING Co Ltd
Priority to CN201420179691.1U priority Critical patent/CN203778680U/en
Application granted granted Critical
Publication of CN203778680U publication Critical patent/CN203778680U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Clamps And Clips (AREA)

Abstract

A claw beam structure of a charging and discharging machine for forging with telescopic and rotary functions comprises a guide cylinder, a telescopic square tube, a hollow shaft, a pull rod, a clamping oil cylinder, a clamp mechanism and a claw beam rotary driving device. The guide cylinder, the telescopic square tube, the hollow shaft and the pull rod are coaxially arranged, the telescopic square tube, the hollow shaft and the pull rod are connected with the claw beam rotary driving device to form a whole in a combined mode and can move back and forth along with the movement of the telescopic square tube, the hollow shaft and the pull rod can rotate as a whole in the plane coaxially perpendicular to the hollow shaft and the pull rod, and the pull rod further can move in the back and forth direction relative to the hollow shaft at the same time. The claw beam structure of the charging and discharging machine for forging with telescopic and rotary functions further can complete the movements of clamping head rotation, claw beam extension and retraction and the like while not influencing clamping and loosening of a jaw in the claw beam structure. The claw beam structure is simple in structure, compact in size and stable and reliable in performance, and can safely complete loading, unloading and transferring tasks under frequent impact of dynamic load.

Description

There is the claw beam structure of charging and discharging machine for the forging of flexible and revolute function
Technical field
The utility model relates to the structure of the claw beam on the charging and discharging machine using in forging process, belongs to the technical field of Machine Design.
Background technology
Domestic forging industry is bearing production capacity surplus and world's financial crisis dual-pressure at present, and enterprise wants to try to achieve survival and development under current severe situation, improves product matter, and reducing production costs is the task of top priority.Therefore, improve the mechanization of producing, reduce labour intensity and cost and be very important.
At present, automotive hub forging is for packing forging steel ingot or blank into heating furnace with charging and discharging machine, and the steel ingot heating or blank can be taken out from heating furnace, gives the equipment of forging press or forging manipulator.It is an important equipment in forging process.Existing automotive hub forge with the claw beam of charging and discharging machine possess binding clip clamping, claw beam is faced upward the holding functions such as lifting of bowing, and says the function also with carriage walking, large vehicle walking in addition with regard to charging and discharging machine entirety.Because claw beam action is single, very flexible, so can not adapt to multi-angle operation.Although had certain improvement for the holding function of claw beam so far, great majority by be brace and connecting rod framework, not only complex structure, bulky, and can not adapt to the frequent impact of dynamic loading, anti-fatigue performance is poor, reliability has much room for improvement.
Utility model content
Keeping on the basis of the original holding function of claw beam, the utility model provides a kind of novel claw beam structure that can make claw beam complete the actions such as flexible, revolution, it is not only simple in structure, volume compact, and stable and reliable for performance, can under the frequent impact of dynamic loading, complete safely handling task.
The technical scheme in the invention for solving the technical problem is: a kind of forging with flexible and revolute function claw beam structure of charging and discharging machine, comprises guide cylinder, flexible square tube, hollow shaft, pull bar, clamping cylinder, clamping mechanism and claw beam device for revolving and driving; Described claw beam device for revolving and driving comprises hydraulic motor two, reduction box and shell body; Described hydraulic motor two is connected with the input of described reduction box and is fixedly installed on described shell body; Described clamping cylinder is fixedly installed on the rear wall of described shell body;
Described guide cylinder is fixed on the car rack of charging and discharging machine, and described guide cylinder extends axially setting along fore-and-aft direction;
Described guide cylinder, flexible square tube, hollow shaft and pull bar coaxially arrange;
Described flexible square tube is nested with in described guide cylinder; On the left side wall of described guide cylinder or right side wall, be provided with a rectangular groove; The position of corresponding described groove is fixed with hydraulic motor one on the outer wall of described guide cylinder, and gear one is set on the output shaft of described hydraulic motor one, and described gear one is corresponding to described groove; Groove one side on corresponding described guide cylinder, fix one along the flexible axial tooth bar of square tube, and described tooth bar coordinates on the left side wall of described flexible square tube or right side wall with described gear one; The front and back ends of the described flexible square tube respectively front and back ends of relatively described guide cylinder outwards has extension;
The rear end of described flexible square tube is fixedly installed on the front side wall of described shell body;
Described hollow shaft is nested with in described flexible square tube; The rear end of described hollow shaft connects the output of described reduction box; The front end of the relatively described flexible square tube of the front end of described hollow shaft stretches out, and the front end of described hollow shaft and the outer wall of described clamping mechanism are connected;
Described pull bar is nested with in described hollow shaft; Coaxially the be connected piston rod of described clamping cylinder of the rear end of described pull bar; The front end of described pull bar passes the inner part of the front end connecting clamp mechanism of described hollow shaft;
Described hollow shaft can either be done the as a whole revolution in its axial vertical plane that is with pull bar, and described pull bar can move along fore-and-aft direction relative to described hollow shaft again simultaneously.
Further, for realizing the synchronous revolving action between described hollow shaft and pull bar and the action relatively moving, can make the die cavity of described hollow shaft consistent with described pull bar profile, between hollow shaft die cavity and pull bar profile, adopting profile coordinates, and the radial section of described hollow shaft die cavity is square or hexagon, accordingly, the radial section of described pull bar is square or hexagon.
Further, for realizing the synchronous revolving action between described hollow shaft and pull bar and the action relatively moving, can also on a section outside described flexible square tube front end, axially extended gathering sill be set in described hollow shaft, pin-and-hole is radially set on described pull bar, a pivot pin is imported into the right by the left side of gathering sill, passed by the right side of gathering sill through after pin-and-hole, the maximum radial dimension of described pivot pin is consistent with the radial height of described gathering sill.
Further, between the output of the reduction box of described claw beam device for revolving and driving and the rear end of described hollow shaft, adopt worm gear-endless screw drive mechanism.
Further, on the clamping oil circuit of described clamping cylinder and rod chamber oil circuit, be provided with accumulator.
The beneficial effects of the utility model are: its jaw in not affecting clamping mechanism clamp and loosen, in the holding function of claw beam lifting, can complete again the actions such as chuck turns round, claw beam is flexible, it is not only simple in structure, volume compact, and stable and reliable for performance, can under the frequent impact of dynamic loading, complete safely handling and transfer task.
Brief description of the drawings
Fig. 1 is the sectional structure schematic diagram of embodiment mono-in left line of vision the utility model;
Fig. 2 is a kind of cross-sectional view at A-A place in Fig. 1;
Fig. 3 is the another kind of cross-sectional view at A-A place in Fig. 1;
Fig. 4 is the sectional structure schematic diagram of embodiment bis-in left line of vision the utility model;
Fig. 5 is the cross-sectional view at B-B place in Fig. 4;
Fig. 6 is the structural representation that drives flexible square tube front and back action part in the utility model;
In figure: flexible square tube 21 tooth bar 3 hollow shaft 31 claw beam device for revolving and driving 311 hydraulic motor 2 312 reduction box 313 shell body 32 gathering sill 4 pull bar 41 clamping cylinder 42 pivot pin 5 clamp mechanism of 1 guide cylinder 11 hydraulic motor one 12 gear 1.
Detailed description of the invention
For ease of understanding the technical solution of the utility model, below in conjunction with accompanying drawing, wherein related technology contents is described further.
In to description of the present utility model, it should be noted that, term " on ", orientation or the position relationship of the instruction such as D score, " left side ", " right side ", " interior ", " outward ", 'fornt', 'back' be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as restriction of the present utility model.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection, can be to be directly connected, also can indirectly be connected by intermediary, and can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete meaning in the present invention.
As shown in Fig. 1, Fig. 4, Fig. 6,
There is a claw beam structure for charging and discharging machine for the forging of flexible and revolute function, comprise guide cylinder 1, flexible square tube 2, hollow shaft 3, pull bar 4, clamping cylinder 41, clamping mechanism 5 and claw beam device for revolving and driving 31.Described claw beam device for revolving and driving 31 comprises hydraulic motor 2 311, reduction box 312 and shell body 313.Described hydraulic motor 2 311 is connected with the input of described reduction box 312 and is fixedly installed on the rear wall upper end position on described shell body 313.Described clamping cylinder 41 is fixedly installed on the lower end position on the rear wall of described shell body 313.On the clamping oil circuit of described clamping cylinder 41 and rod chamber oil circuit, be provided with accumulator.
Described guide cylinder 1 is fixed on the car rack of charging and discharging machine, and makes described guide cylinder 1 extend axially setting along fore-and-aft direction.Described guide cylinder 1, flexible square tube 2, hollow shaft 3 and pull bar 4 coaxially arrange.
Described flexible square tube 2 is nested with in described guide cylinder 1.On the left side wall of described guide cylinder 1, be provided with a rectangular groove, the position of corresponding described groove, on the outer wall of described guide cylinder 1, be fixed with hydraulic motor 1, gear 1 is set on the output shaft of described hydraulic motor 1, described gear 1 is corresponding to described groove.Groove one side on corresponding described guide cylinder 1, fix one along the flexible axial tooth bar 21 of square tube 2, and described tooth bar 21 coordinates on the left side wall of described flexible square tube 2 with described gear 1.The front and back ends of the described flexible square tube 2 respectively front and back ends of relatively described guide cylinder 1 outwards has extension.
The rear end of described flexible square tube 2 is fixedly installed on the front side wall of described shell body 313.Described hollow shaft 3 is nested with in described flexible square tube 2.The rear end of described hollow shaft 3 connects the output of described reduction box 312.Between the rear end of the output of the reduction box of described claw beam device for revolving and driving 31 and described hollow shaft 3, preferably adopt worm gear-endless screw drive mechanism.The front end of the relatively described flexible square tube 2 of the front end of described hollow shaft 3 stretches out, and the outer wall of the front end of described hollow shaft 3 and described clamping mechanism 5 is fixed with one.
Described pull bar 4 is nested with in described hollow shaft 3.Coaxially the be connected piston rod 41 of described clamping cylinder of the rear end of described pull bar 4, the front end of described pull bar 4 passes the inner part of the front end connecting clamp mechanism 5 of described hollow shaft 3.It should be noted that, being connected between described pull bar 4 and the inner part of described clamping mechanism 5, object is to realize opening and closed action of clamping mechanism 5 jaws, this is for the utility model, for prior art, think existing structure reference use, no longer describe in detail.
Described hollow shaft 3 and pull bar 4 can either be connected entirety (on gyratory directions as one, by the profile matching relationship between hollow shaft 3 and pull bar 4), in the axial vertical plane inter-sync revolution common with it, described pull bar 4 can move along fore-and-aft direction relative to described hollow shaft 3 again simultaneously.Object is to make described hollow shaft 3 and pull bar 4 synchronously complete when action revolution to drive described clamping mechanism 5 to complete revolution action (outer wall of the front end of described hollow shaft 3 and described clamping mechanism 5 is fixed with one), makes again under action, to make before and after pull bar in described clamping mechanism 5 jaw complete to open and clamp simultaneously and moves.For realizing the synchronous revolving action between above-mentioned hollow shaft 3 and pull bar 4 and the action relatively moving, as shown in Figure 1, Figure 2, Figure 3 shows, can make the die cavity of described hollow shaft 3 consistent with described pull bar 4 profiles, between hollow shaft 3 die cavities and pull bar 4 profiles, adopting profile coordinates, and the radial section of described hollow shaft 3 die cavities is square or hexagon, accordingly, the radial section of described pull bar 4 is square or hexagon.As shown in Figure 4, Figure 5, can also on a section outside described flexible square tube 2 front ends, axially extended gathering sill 32 be set in described hollow shaft 3, pin-and-hole is radially set on described pull bar 4, a pivot pin 42 is imported into the right by the left side of gathering sill 32, through being passed by the right side of gathering sill 32 after the pin-and-hole on pull bar 4, the maximum radial dimension of described pivot pin 42 is consistent with described gathering sill 32 height radially.It should be noted that, in rear a kind of mode, the setting of the axial length of described gathering sill 32 will guarantee to meet pull bar 4 when elastic, and jaw is opened and closed needs.
Jaw clamps and loosens: the executive component of action is clamping cylinder 41, in the time of clamping cylinder 41 rod chamber oil-feed, pulls the pull bar 4 being connected with clamping mechanism 5 to drive left and right tong arm inwardly to rotate by piston rod, makes Workpiece clamping; In the time of clamping cylinder 41 rodless cavity oil-feed, the pull bar 4 that is promoted to be connected with clamping mechanism 5 by piston rod drives left and right tong arm outwards to rotate, and workpiece is loosened.In order to prevent that oil circuit is slightly revealed in the clamping course of work, cause clamping force to decline, workpiece comes off, and on clamping oil circuit (and clamping cylinder rod chamber oil circuit), is provided with accumulator, constantly supplements hydraulic oil to clamping cylinder 41, keeps clamping force.It should be noted that, the very important feature that this clamping cylinder 41 is different from common oil cylinder is: when cylinder rod chamber oil-feed, when piston rod retraction clamping work pieces, piston rod can rotate relative to oil cylinder housing.Otherwise, in the time of oil cylinder rodless cavity oil-feed, do not allow piston rod rotation.
Claw beam is flexible: the hydraulic motor by low-speed big (band internal control brake) provides power, drive the tooth bar 21 in flexible square tube 2 by shaft gear (being gear 1), realize flexible (i.e. the moving forward and backward of flexible square tube 2 relative guide cylinders 1) of claw beam.Shown in Fig. 2, Fig. 3, flexible square tube 2, hollow shaft 3, pull bar 4, clamping cylinder 41 4 connect as one by the shell body 313 of claw beam device for revolving and driving 31, so when the flexible relative guide cylinder 1 of square tube 2 moves forward and backward, hollow shaft 3, pull bar 4, clamping cylinder 41 and whole claw beam device for revolving and driving 31 all synchronously move forward and backward.
Adopt worm gear-endless screw drive mechanism between the output of reduction box 312 of described claw beam device for revolving and driving 31 and the rear end of described hollow shaft 3 time:
Claw beam revolution: hydraulic motor 2 311 drives worm gear to rotate by worm gear-endless screw reducing gear, worm gear drives the hollow shaft 3 in flexible square tube 2 to turn round, thereby realizes the cylinder piston rod of pull bar 4 in hollow shaft 3, hollow shaft 3, clamping cylinder 41 and be fixed on the revolution of the whole clamping mechanism 5 of hollow shaft 3 front ends.Pay particular attention to: when clamping cylinder 41 post-tensionings make pliers head clip clamping of workpieces, claw beam can turn round; In the time that binding clip does not have holding workpiece, claw beam tries not to turn round (if must turn round, can first operate clamping lever, make clamping cylinder 41 post-tensionings once, then make claw beam revolution); When clamping cylinder 41 stretches out piston rod, when binding clip opens up into maximum rating or binding clip and opens the inner chamber of outer support annular workpieces, absolutely not to make claw beam revolution.The reduction box 312 of meeting badly damaged clamping cylinder 41, hollow shaft 3 and claw beam device for revolving and driving 31 like this.
Except the technical characterictic described in description, be the known technology of those skilled in the art.

Claims (5)

1. there is a claw beam structure for charging and discharging machine for the forging of flexible and revolute function, it is characterized in that:
Comprise guide cylinder, flexible square tube, hollow shaft, pull bar, clamping cylinder, clamping mechanism and claw beam device for revolving and driving; Described claw beam device for revolving and driving comprises hydraulic motor two, reduction box and shell body;
Described hydraulic motor two is connected with the input of described reduction box and is fixedly installed on described shell body; Described clamping cylinder is fixedly installed on the rear wall of described shell body;
Described guide cylinder is fixed on the car rack of charging and discharging machine, and described guide cylinder extends axially setting along fore-and-aft direction; Described guide cylinder, flexible square tube, hollow shaft and pull bar coaxially arrange;
Described flexible square tube is nested with in described guide cylinder; On the left side wall of described guide cylinder or right side wall, be provided with a rectangular groove;
The position of corresponding described groove is fixed with hydraulic motor one on the outer wall of described guide cylinder, and gear one is set on the output shaft of described hydraulic motor one, and described gear one is corresponding to described groove;
Groove one side on corresponding described guide cylinder, fix one along the flexible axial tooth bar of square tube, and described tooth bar coordinates on the left side wall of described flexible square tube or right side wall with described gear one; The front and back ends of the described flexible square tube respectively front and back ends of relatively described guide cylinder outwards has extension; The rear end of described flexible square tube is fixedly installed on the front side wall of described shell body;
Described hollow shaft is nested with in described flexible square tube; The rear end of described hollow shaft connects the output of described reduction box; The front end of the relatively described flexible square tube of the front end of described hollow shaft stretches out, and the front end of described hollow shaft and the outer wall of described clamping mechanism are connected;
Described pull bar is nested with in described hollow shaft; Coaxially the be connected piston rod of described clamping cylinder of the rear end of described pull bar; The front end of described pull bar passes the inner part of the front end connecting clamp mechanism of described hollow shaft;
Described hollow shaft can either be done the as a whole revolution in its axial vertical plane that is with pull bar, and described pull bar can move along fore-and-aft direction relative to described hollow shaft again simultaneously.
2. a kind of claw beam structure of charging and discharging machine for the forging of flexible and revolute function that has according to claim 1, it is characterized in that: the die cavity of described hollow shaft is consistent with described pull bar profile, between hollow shaft die cavity and pull bar profile, adopting profile coordinates, and the radial section of described hollow shaft die cavity is square or hexagon, accordingly, the radial section of described pull bar is square or hexagon.
3. a kind of claw beam structure of charging and discharging machine for the forging of flexible and revolute function that has according to claim 1, it is characterized in that: on one section in described hollow shaft outside described flexible square tube front end, axially extended gathering sill is set, pin-and-hole is radially set on described pull bar, a pivot pin is imported into the right by the left side of gathering sill, passed by the right side of gathering sill through after pin-and-hole, the maximum radial dimension of described pivot pin is consistent with the radial height of described gathering sill.
4. the claw beam structure of using charging and discharging machine according to a kind of forging with flexible and revolute function described in any one in claims 1 to 3, is characterized in that: between the output of the reduction box of described claw beam device for revolving and driving and the rear end of described hollow shaft, adopt worm gear-endless screw drive mechanism.
5. the claw beam structure according to a kind of described in any one in claims 1 to 3 with the forging charging and discharging machine of flexible and revolute function, is characterized in that: on the clamping oil circuit of described clamping cylinder and rod chamber oil circuit, be provided with accumulator.
CN201420179691.1U 2014-04-14 2014-04-14 Claw beam structure of charging and discharging machine for forging with telescopic and rotary functions Expired - Lifetime CN203778680U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420179691.1U CN203778680U (en) 2014-04-14 2014-04-14 Claw beam structure of charging and discharging machine for forging with telescopic and rotary functions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420179691.1U CN203778680U (en) 2014-04-14 2014-04-14 Claw beam structure of charging and discharging machine for forging with telescopic and rotary functions

Publications (1)

Publication Number Publication Date
CN203778680U true CN203778680U (en) 2014-08-20

Family

ID=51314908

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420179691.1U Expired - Lifetime CN203778680U (en) 2014-04-14 2014-04-14 Claw beam structure of charging and discharging machine for forging with telescopic and rotary functions

Country Status (1)

Country Link
CN (1) CN203778680U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103878294A (en) * 2014-04-14 2014-06-25 章丘市荣升锻压有限公司 Nippling lever structure of forging charging and discharging machine and with telescopic function and rotation function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103878294A (en) * 2014-04-14 2014-06-25 章丘市荣升锻压有限公司 Nippling lever structure of forging charging and discharging machine and with telescopic function and rotation function

Similar Documents

Publication Publication Date Title
CN205870522U (en) Five swing arm forging and pressing machine people
CN210791020U (en) Industrial robot's centre gripping hand claw
CN201432178Y (en) Locking structure of assembling and welding jig for automobile side wall frame
CN203253867U (en) Hydraulic clamping rotary mechanical hand for forging manipulator
CN102689299A (en) Material-charging material-taking servo simulated manipulator
CN102019340A (en) Claw beam lifting mechanism for forging manipulator
CN202726912U (en) Loading/unloading servo simulation manipulator
CN203830631U (en) Improved structure of forceps rod portion of forging, charging and discharging machine
CN204770427U (en) Forge and press high -efficient heavily loaded work robot and go up connecting rod in same direction as antithetical couplet formula hoist mechanism
CN203778680U (en) Claw beam structure of charging and discharging machine for forging with telescopic and rotary functions
CN103878294A (en) Nippling lever structure of forging charging and discharging machine and with telescopic function and rotation function
CN210305619U (en) Automatic feeding device for forged parts
CN211071636U (en) High efficiency flange forges hammer
CN103934401B (en) The modified node method of forging charging and discharging machine claw beam part
CN205552113U (en) Feeding mechanical arm in vertical punch press sucking disc formula
CN209664137U (en) Pressing robot is used in a kind of processing of mold
CN103878295B (en) The new structure of forging charging and discharging machine claw beam part
CN203830643U (en) Novel structure for forging claw beam part of charging and discharging machine
CN209139793U (en) A kind of die casting machine automation pickup arm
CN103659840A (en) Tail end operational tool assembly of mechanical arm
CN208288912U (en) A kind of small-sized efficient forging manipulator
CN207738070U (en) A kind of novel tire clamp device
CN215789956U (en) Forearm retractable joint manipulator
CN203778681U (en) Charging and discharging machine for forging automobile hub
CN103934407B (en) A kind of charging and discharging machine forging automotive hub

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee
CP01 Change in the name or title of a patent holder

Address after: Ji'nan City Messire industrial zone of Zhangqiu city in Shandong province 250203

Patentee after: Shandong Rongsheng Heavy Machinery Co.,Ltd.

Address before: Ji'nan City Messire industrial zone of Zhangqiu city in Shandong province 250203

Patentee before: ZHANGQIU RONGSHENG FORGING CO.,LTD.

CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 250203 Xianggong Industrial Zone, Zhangqiu District, Jinan City, Shandong Province

Patentee after: Shandong Rongsheng Heavy Machinery Co.,Ltd.

Address before: Ji'nan City Messire industrial zone of Zhangqiu city in Shandong province 250203

Patentee before: Shandong Rongsheng Heavy Machinery Co.,Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20140820