CN111633203A - Arc bilateral directional position mechanism with guide function - Google Patents

Arc bilateral directional position mechanism with guide function Download PDF

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Publication number
CN111633203A
CN111633203A CN202010484538.XA CN202010484538A CN111633203A CN 111633203 A CN111633203 A CN 111633203A CN 202010484538 A CN202010484538 A CN 202010484538A CN 111633203 A CN111633203 A CN 111633203A
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CN
China
Prior art keywords
cylinder
sand box
supporting rod
positioning mechanism
guide function
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.)
Pending
Application number
CN202010484538.XA
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Chinese (zh)
Inventor
任玉宝
张国辉
李菲
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.)
Ziheng Tianjin Industry Co ltd
Original Assignee
Ziheng Tianjin Industry 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 Ziheng Tianjin Industry Co ltd filed Critical Ziheng Tianjin Industry Co ltd
Priority to CN202010484538.XA priority Critical patent/CN111633203A/en
Publication of CN111633203A publication Critical patent/CN111633203A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D33/00Equipment for handling moulds
    • B22D33/02Turning or transposing moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C23/00Tools; Devices not mentioned before for moulding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/22Devices influencing the relative position or the attitude of articles during transit by conveyors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/22Devices influencing the relative position or the attitude of articles during transit by conveyors
    • B65G47/24Devices influencing the relative position or the attitude of articles during transit by conveyors orientating the articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/02Articles
    • B65G2201/0235Containers
    • B65G2201/0258Trays, totes or bins

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Devices For Molds (AREA)

Abstract

The invention belongs to the technical field of matching of casting equipment, and particularly relates to an arc bilateral positioning mechanism with a guide function.

Description

Arc bilateral directional position mechanism with guide function
Technical Field
The invention belongs to the technical field of matching of casting equipment, and particularly relates to an arc bilateral positioning mechanism with a guide function.
Background
In the casting equipment field, when the sand box is carried on the production line, every station of sand box is all very important, if the sand box position is inaccurate, can lead to the molding, upset, disclose the case, fall the case, divide the case, mould assembling etc. and go on smoothly, cause the production waste product, cause the damage to equipment and even the accident, consequently, every important station all need have positioner to guarantee the position of sand box, current sand box positioning mechanism structure is complicated, with high costs and the unstable problem of operation.
Disclosure of Invention
The invention provides an arc bilateral positioning mechanism with a guide function, and aims to solve the problems that the existing sand box positioning mechanism is complex in structure, high in cost and unstable in operation in the background art.
The technical problem solved by the invention is realized by adopting the following technical scheme: the arc bilateral positioning mechanism with the guide function comprises cylinder supports arranged on a sand box roller path or on each single machine, the tail parts of the cylinder supports are connected to one ends of driving devices, the other ends of the driving devices are connected to one ends of supporting rod devices, and the other ends of the supporting rod devices are respectively and rotatably connected to a first blocking roller which is opposite to the movement direction of a sand box and a second blocking roller which is perpendicular to the movement direction of the sand box and is tangent to the outer surface of the sand box.
Further, drive arrangement includes the cylinder, the back trunnion of cylinder is connected in cylinder support afterbody, the cylinder end of cylinder is connected in rod end joint bearing's one end, rod end joint bearing's the other end passes through the one end of second round pin hub connection in branch.
Further, the supporting rod device comprises a lever transmission mechanism, the lever transmission mechanism comprises a supporting rod, one end of the supporting rod is connected to the rod end joint bearing, and the other end of the supporting rod forms a rotating fulcrum through a fulcrum pin shaft penetrating through the lower joint bearing of the cylinder support and the upper joint bearing of the supporting rod.
Furthermore, the other end of the supporting rod is connected to the first blocking roller and the second blocking roller through joint bearings respectively.
Further, the cylinder head of the air cylinder is connected to one end of the rod end joint bearing through an external thread arranged at the end part of the cylinder head.
Further, the cylinder support afterbody is through the back trunnion of first round pin hub connection in cylinder.
Further, the orientation mechanism can be arranged at any one of the four corner ends of the top surface of the sand box.
Further, the orientation mechanism can be respectively arranged at each corner end of the four corner ends of the top surface of the sand box.
Further, the first blocking roller and the second blocking roller are respectively subjected to quenching heat treatment.
Further, the corresponding mounting hole of the lower joint bearing of the cylinder support is a long hole.
The beneficial technical effects are as follows:
the tail part of the cylinder support is connected with one end of a driving device, the other end of the driving device is connected with one end of a supporting rod device, the other end of the supporting rod device is respectively and rotatably connected with a first blocking roller which is opposite to the motion direction of the sand box and a second blocking roller which is perpendicular to the motion direction of the sand box and is tangent to the outer surface of the sand box, when the mechanism works normally, a cylinder rod of the cylinder is in a retraction state, a certain gap is reserved between the two blocking rollers and the outermost surface of the sand box in the motion direction of the sand box, when the sand box moves to the station, the cylinder rod of the cylinder extends out, the two blocking rollers are respectively tangent to the outermost surface of the sand box in the motion direction of the sand box and the outermost surface of the sand box which is perpendicular to the motion direction of the sand box, the motion direction of the blocking sand box and the front-back direction and the back direction which, the novel structure can realize the bidirectional positioning along the movement direction of the sand box and the movement direction of the sand box by only one cylinder in each set of device, can realize the positioning in four directions by using four sets of devices at four corners of the sand box, saves the cost, is safe and reliable, has simple structure, scientific and reasonable design and is easy to install and disassemble.
Drawings
FIG. 1 is a top view of a circular arc double-sided orientation mechanism with guides of the present invention;
FIG. 2 is a left side view of a circular arc double-sided orientation mechanism with guides of the present invention;
FIG. 3 is a front view of a circular arc double-sided orientation mechanism with guides of the present invention;
FIG. 4 is a top view A-A of an enlarged partial cross-sectional view of a circular arc double-sided orientation mechanism with guides of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
in the figure: 1-cylinder support, 2-driving device, 3-supporting rod device, 4-first baffle roller, 5-second baffle roller, 6-cylinder, 7-rod end joint bearing, 8-second pin shaft, 9-supporting rod, 10-lower joint bearing, 11-upper joint bearing and 12-fulcrum pin shaft.
Example (b):
in this embodiment: as shown in fig. 1, 2, 3 and 4, the circular arc double-side orientation mechanism with guide comprises a cylinder support 1 arranged on a sand box roller path or on each single machine, the tail part of the cylinder support 1 is connected with one end of a driving device 2, the other end of the driving device 2 is connected with one end of a strut device 3, and the other end of the strut device 3 is respectively and rotatably connected with a first baffle roller 4 opposite to the movement direction of the sand box and a second baffle roller 5 which is perpendicular to the movement direction of the sand box and is tangent to the outer surface of the sand box.
Because the tail part of the air cylinder support is connected with one end of the driving device, the other end of the driving device is connected with one end of the supporting rod device, the other end of the supporting rod device is respectively and rotatably connected with the first blocking roller which is opposite to the movement direction of the sand box and the second blocking roller which is vertical to the movement direction of the sand box and is tangent to the outer surface of the sand box, when the mechanism works normally, the air cylinder rod is in a retraction state, the two blocking rollers are respectively tangent to the outermost surface of the sand box in the movement direction of the sand box and the outermost surface of the sand box in the movement direction of the sand box, when the sand box moves to the station, the air cylinder rod extends out, the two blocking rollers are respectively tangent to the outermost surface of the sand box in the movement direction of the sand box and the outermost surface of the sand box in the movement direction of the sand box, the movement direction of the blocking sand box and the, the novel structure can realize the bidirectional positioning along the movement direction of the sand box and the movement direction of the sand box by only one cylinder in each set of device, can realize the positioning in four directions by using four sets of devices at four corners of the sand box, saves the cost, is safe and reliable, has simple structure, scientific and reasonable design and is easy to install and disassemble.
The term "single machine" as used herein means a mechanism other than a molding machine on a molding line, such as a box turnover machine, a box closing machine, a box separation machine, a box falling machine, a box poking machine, a gate milling machine, a gas hole drilling machine, a sand scraping machine, a pallet cleaning machine, and the like.
The driving device 2 comprises a cylinder 6, the rear trunnion of the cylinder 6 is connected to the tail of the cylinder support 1, the cylinder head of the cylinder 6 is connected to one end of a rod end joint bearing 7, and the other end of the rod end joint bearing 7 is connected to one end of a supporting rod 9 through a second pin shaft 8.
Because the driving device comprises the air cylinder, the rear trunnion of the air cylinder is connected with the tail part of the air cylinder support, the head of the air cylinder is connected with one end of the rod-end joint bearing, the other end of the rod-end joint bearing is connected with one end of the support rod through the second pin shaft, the air cylinder support is arranged on the sand box roller path or each single machine, the rear trunnion of the air cylinder is arranged at the tail part of the air cylinder support and is connected through the pin shaft, the head of the air cylinder is provided with external threads, the rod-end joint bearing is arranged at the head of the air cylinder through threads, when one air cylinder drives two baffle rollers to move to carry out two-direction positioning, and during positioning, if the two directions are locked, the situation of blocking is possible to occur, for people, the moving direction of the sand box is more important compared with the position vertical to, the blocking rollers perpendicular to the movement direction of the sand box allow a clearance of several tenths of millimeters with the sand box, two directions can be positioned by only using one air cylinder, the positioning is more accurate in the position of an important direction, the positioning size of the required matched sand box is strict due to higher precision of the molding machine, the movement direction of the sand box and the movement direction perpendicular to the sand box are higher in requirement, the precision is lost due to the fact that the outer wall of the sand box is damaged, and therefore the blocking rollers are required to guide the outer wall of the sand box in order to prevent the outer wall of the sand box from being damaged when the sand box moves.
The supporting rod device 3 comprises a supporting rod transmission mechanism, the lever transmission mechanism comprises a supporting rod 9, one end of the supporting rod 9 is connected to the rod end joint bearing 7, and the other end of the supporting rod 9 forms a rotating supporting point through a supporting point pin shaft 12 which penetrates through a lower joint bearing 10 of the air cylinder support 1 and an upper joint bearing 11 of the supporting rod 9.
The supporting rod device comprises a lever transmission mechanism, the lever transmission mechanism comprises a supporting rod, one end of the supporting rod is connected to a rod end joint bearing, the other end of the supporting rod forms a rotating fulcrum through a fulcrum pin shaft penetrating through a lower joint bearing of a cylinder support and an upper joint bearing of the supporting rod, the pin shaft is divided into three parts, the first part penetrates through holes of the cylinder support and the supporting rod through upper and lower joint bearings respectively to enable the supporting rod to rotate, the other end of the supporting rod and the rod end joint bearing penetrate through the same pin shaft, two holes are formed in the middle of the supporting rod 1, the remaining two parts of pin shafts penetrate through holes of the supporting rod and a blocking roller through upper and lower joint bearings respectively, the device is installed at four corners of a sand box respectively and is divided into four sets.
The other end of the supporting rod 9 is also respectively connected with the first blocking roller 4 and the second blocking roller 5 through joint bearings.
The cylinder head of the cylinder 6 is connected with one end of a rod end joint bearing 7 through an external thread arranged at the end part of the cylinder head.
The tail of the cylinder support 1 is connected to a rear trunnion of the cylinder 6 through a first pin shaft.
The positioning mechanism can be arranged at any one of the four corner ends of the top surface of the sand box.
The orientation mechanism can also be respectively arranged at each corner end of the four corner ends of the top surface of the sand box.
The positioning mechanism can be arranged at any one of the four corner ends of the top surface of the sand box, and the positioning mechanism can also be arranged at each corner end of the four corner ends of the top surface of the sand box respectively.
The first blocking roller 4 and the second blocking roller 5 are respectively subjected to quenching heat treatment.
As the first blocking roller and the second blocking roller are respectively adopted for quenching heat treatment, the rigidity and the strength of the contact part of the sand box are improved.
The corresponding mounting hole of the lower joint bearing 10 of the cylinder support 1 is a long hole.
The corresponding mounting hole of the lower knuckle bearing of the cylinder support is a long hole, so that the mechanism is convenient to mount and adjust.
The working principle is as follows:
the tail of the cylinder support is connected to one end of a driving device, the other end of the driving device is connected to one end of a supporting rod device, the other end of the supporting rod device is respectively and rotatably connected to a first blocking roller which is opposite to the motion direction of a sand box and a second blocking roller which is perpendicular to the motion direction of the sand box and is tangent to the outer surface of the sand box, when the mechanism works normally, a cylinder rod of the cylinder is in a retraction state, a certain gap is formed between the two blocking rollers and the outermost surface of the sand box in the motion direction of the sand box, when the sand box moves to the station, the cylinder rod of the cylinder extends out, the two blocking rollers are respectively tangent to the outermost surface of the sand box in the motion direction of the sand box and the outermost surface of the sand box which is perpendicular to the motion direction of the sand box, the motion direction of the blocking sand box and the front-back direction which is perpendicular to the motion, the invention solves the problems of complex structure, high cost and unstable operation of the existing sand box positioning mechanism, and has the beneficial technical effects of cost saving, safety, reliability, simple structure, scientific and reasonable design and easy installation and disassembly.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.

Claims (10)

1. The arc bilateral positioning mechanism with the guide function is characterized by comprising cylinder supports arranged on a sand box roller path or each single machine, wherein the tail parts of the cylinder supports are connected to one end of a driving device, the other end of the driving device is connected to one end of a supporting rod device, and the other end of the supporting rod device is respectively and rotatably connected to a first blocking roller and a second blocking roller, wherein the first blocking roller is opposite to the movement direction of a sand box, and the second blocking roller is perpendicular to the movement direction of the sand box and is tangent to the outer surface of the sand box.
2. The arc double-side positioning mechanism with the guide function according to claim 1, wherein the driving device comprises a cylinder, a rear trunnion of the cylinder is connected to a tail of a cylinder support, a cylinder head of the cylinder is connected to one end of a rod end joint bearing, and the other end of the rod end joint bearing is connected to one end of a support rod through a second pin shaft.
3. The arc-shaped double-side orientation mechanism with the guide function according to claim 2, wherein the supporting rod device comprises a lever transmission mechanism, the lever transmission mechanism comprises a supporting rod, one end of the supporting rod is connected to the rod end joint bearing, and the other end of the supporting rod forms a rotating fulcrum through a fulcrum pin shaft penetrating through the lower joint bearing of the cylinder support and the upper joint bearing of the supporting rod.
4. The arc double-side positioning mechanism with the guide function according to claim 3, wherein the other end of the supporting rod is further connected to the first blocking roller and the second blocking roller through knuckle bearings respectively.
5. The arc double-side positioning mechanism with the guide function as claimed in claim 1, wherein the cylinder head of the cylinder is connected to one end of the rod end joint bearing through an external thread arranged at the end of the cylinder head.
6. The arc bilateral positioning mechanism with the guide function as claimed in claim 1, wherein the tail of the cylinder support is connected to the rear trunnion of the cylinder through a first pin.
7. The circular arc double-side positioning mechanism with the guide function according to claim 1, wherein the positioning mechanism can be arranged at any one of four corner ends of the top surface of the sand box.
8. The circular arc double-side positioning mechanism with the guide function according to claim 1, wherein the positioning mechanism can be respectively arranged at each corner end of the four corner ends of the top surface of the sand box.
9. The arc-shaped double-side positioning mechanism with the guide function according to claim 1, wherein the first blocking roller and the second blocking roller are respectively subjected to quenching heat treatment.
10. The arc double-side orientation mechanism with guide of claim 1, wherein the corresponding mounting hole of the lower knuckle bearing of the cylinder support is a long hole.
CN202010484538.XA 2020-06-01 2020-06-01 Arc bilateral directional position mechanism with guide function Pending CN111633203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010484538.XA CN111633203A (en) 2020-06-01 2020-06-01 Arc bilateral directional position mechanism with guide function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010484538.XA CN111633203A (en) 2020-06-01 2020-06-01 Arc bilateral directional position mechanism with guide function

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CN111633203A true CN111633203A (en) 2020-09-08

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1106038B (en) * 1957-04-11 1961-05-04 Badische Maschinenfabrik A G Device for transferring the molding box from a roller conveyor, which is driven in time with the molding system, to a continuously rotating stationary track or vice versa
GB1000147A (en) * 1961-07-17 1965-08-04 Dunlop Rubber Co Method and apparatus for orientating workpieces
CN1638025A (en) * 2003-10-20 2005-07-13 应用材料股份有限公司 Load lock chamber for large area substrate processing system
CN101468756A (en) * 2007-11-29 2009-07-01 赛德尔参与公司 Method and device for orientating products on a conveyor
KR20100117934A (en) * 2009-04-27 2010-11-04 농심엔지니어링 주식회사 Apparatus for lining up cartons
CN202670706U (en) * 2012-07-27 2013-01-16 毛成兵 Accurate locating intermittent conveying mechanism for paper cylinder cake
CN104108584A (en) * 2014-07-04 2014-10-22 芜湖市海联机械设备有限公司 Pipe conveyor
CN106424697A (en) * 2016-09-27 2017-02-22 苏州欣苏诚铸造机械有限公司 Precise positioning mechanism for casting
CN107838385A (en) * 2017-12-12 2018-03-27 盛瑞传动股份有限公司 A kind of sand box positioning device in locomotive transfer process
CN108328272A (en) * 2018-03-07 2018-07-27 佛山达健实验设备有限公司 A kind of coiled material tail end orientation conveying device
CN109834018A (en) * 2019-02-21 2019-06-04 东莞睿步机器人科技有限公司 A kind of frame case, frame case coating automatic assembly line and its production method

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1106038B (en) * 1957-04-11 1961-05-04 Badische Maschinenfabrik A G Device for transferring the molding box from a roller conveyor, which is driven in time with the molding system, to a continuously rotating stationary track or vice versa
GB1000147A (en) * 1961-07-17 1965-08-04 Dunlop Rubber Co Method and apparatus for orientating workpieces
CN1638025A (en) * 2003-10-20 2005-07-13 应用材料股份有限公司 Load lock chamber for large area substrate processing system
CN101468756A (en) * 2007-11-29 2009-07-01 赛德尔参与公司 Method and device for orientating products on a conveyor
KR20100117934A (en) * 2009-04-27 2010-11-04 농심엔지니어링 주식회사 Apparatus for lining up cartons
CN202670706U (en) * 2012-07-27 2013-01-16 毛成兵 Accurate locating intermittent conveying mechanism for paper cylinder cake
CN104108584A (en) * 2014-07-04 2014-10-22 芜湖市海联机械设备有限公司 Pipe conveyor
CN106424697A (en) * 2016-09-27 2017-02-22 苏州欣苏诚铸造机械有限公司 Precise positioning mechanism for casting
CN107838385A (en) * 2017-12-12 2018-03-27 盛瑞传动股份有限公司 A kind of sand box positioning device in locomotive transfer process
CN108328272A (en) * 2018-03-07 2018-07-27 佛山达健实验设备有限公司 A kind of coiled material tail end orientation conveying device
CN109834018A (en) * 2019-02-21 2019-06-04 东莞睿步机器人科技有限公司 A kind of frame case, frame case coating automatic assembly line and its production method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王会儒译;(美)罗伯特•S.本克: "《运动解剖学 第3版》", 30 June 2019, 河南科学技术出版社 *

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Application publication date: 20200908