CN202479312U

CN202479312U - Multi-station hydraulic stretcher with transposition manipulator

Info

Publication number: CN202479312U
Application number: CN201220018651XU
Authority: CN
Inventors: 韩建国
Original assignee: YUEHAI STRETCHING MACHINERY CO Ltd SUZHOU CITY
Current assignee: YUEHAI STRETCHING MACHINERY CO Ltd SUZHOU CITY
Priority date: 2012-01-17
Filing date: 2012-01-17
Publication date: 2012-10-10
Anticipated expiration: 2022-01-17

Abstract

The utility model relates to a multi-station hydraulic stretcher with a transposition manipulator. The multi-station hydraulic stretcher with the transposition manipulator comprises a base, a base table plate, an upper cylinder table plate, a middle column, peripheral columns, and the transposition manipulator. The base is fixed on the ground. The base table plate is fixed on the base. The middle column and the peripheral columns support the upper cylinder table plate and an operating table plate between the upper cylinder table plate and the base table plate. A plurality of upper hydraulic cylinders are distributed on the upper periphery of the upper cylinder table plate. A crank mechanism is arranged between the base table plate and the operating table plate and drives the operating table plate to move up and down. The operating table plate is provided with die stations corresponding to the upper hydraulic cylinders. The transposition manipulator is disposed on the operating table plate and can be turned left or right to hold or release workpieces. The independent die stations are arranged on the stretcher, and accordingly one product can be multi-stretched on the same stretcher. In addition, the transposition manipulator can be used to transpose the workpieces automatically.

Description

A kind of multi-station hydraulic stretching-machine with transposition mechanical arm

Technical field

The utility model relates to a kind of hydraulic tensioning equipment; Especially relate to the multi-station hydraulic stretching-machine of the band transposition mechanical arm that a kind of flexibility is high, operability is good, production efficiency is high, labour intensity is little, yield rate is high, cost is low, security is good, belong to the hydraulic tensioning equipment technical field.

Background technology

At present, adopt the four-column type hydraulic tensioner to accomplish to the product that is pressed into moulding, and drawing and forming spare is not the one-off drawing completion mostly, could accomplish but will pass through multiple working procedure more.Therefore in the factory process process, the per pass operation is processed many hydraulic tensioners of a product needed and is formed streamline one all to a hydraulic tensioner should be arranged.

In use there is following shortcoming in existing hydraulic tensioner: 1) production efficiency is low, and labour intensity is big.The workman who is responsible for the per pass operation repeats same mechanical action every day, and labour intensity is bigger, and workman's need of work has a rest, and has reduced the production time between invisible, has reduced production efficiency; 2) yield rate is relatively low, because workman's repeated labor intensity is bigger, is easy to generate fatigue, therefore in process, has more error, causes product rejection; 3) energy consumption is high, and every operation all needs corresponding hydraulic tensioner, so hydraulic tensioner quantity is more, and consumes energy also can be more; 4) labor cost is high, because it is more to process required machine quantity, every machine needs a workman again at least, the workman who also needs some between different operations, to coordinate in addition, so number of workers is more, labor cost is higher; 5) safety coefficient is low, because workman's action need gos deep into machine intimate, when workman's maloperation or machine break down, causes personnel's injures and deaths easily.

At present, multiple position press puts goods on the market, but mostly multiple position press is the multistation punch press, and is then rare for the multi-station hydraulic stretching-machine.Multiple position press adopts the station straight line more; The rising of workpiece proposes the action of mould district; Straight line transposition action, workpiece decline are put into the action in mould district and are adopted machine driving to realize more, and some parts that needs in the process to regulate in the transmission mechanism adapt to different dies; Flexibility is not high, poor operability.

The utility model content

The utility model purpose is the multi-station hydraulic stretching-machine that has proposed the band transposition mechanical arm that a kind of flexibility is high, operability is good, production efficiency is high, labour intensity is little, yield rate is high, cost is low, security is good for the deficiency that overcomes prior art.

For achieving the above object, the technical scheme that the utility model adopts is: a kind of multi-station hydraulic stretching-machine with transposition mechanical arm comprises base, support platen, upper cylinder platen, middle standing pillar, circumference column, transposition mechanical arm; Said base fixes on the ground; Said support platen is fixed on the base; Said middle standing pillar and circumference column are separately positioned on and support upper cylinder platen and working plate between upper cylinder platen and the support platen, are distributed with a plurality of hydraulic cylinders of going up on the said upper cylinder platen upper surface circumferencial direction; Between said support platen and the working plate toggle mechanism is arranged; Corresponding position of going up hydraulic cylinder is provided with the mould station on the said working plate; Said toggle mechanism comprises short connecting rod, long connecting rod, bent connecting rod, upper bed-plate, lower bottom base, travel(l)ing rest, hydraulic cylinder down; Said upper bed-plate and lower bottom base are separately fixed on working plate and the support platen; The top of said long connecting rod and upper bed-plate hinge, the bottom of said bent connecting rod and lower bottom base hinge; The bottom of said long connecting rod and the upper hinge of bent connecting rod; The two ends of said short connecting rod respectively with hinge place, the travel(l)ing rest hinge of long connecting rod and bent connecting rod; Said travel(l)ing rest links to each other with the piston rod of following hydraulic cylinder; Said transposition mechanical arm is arranged on the working plate, but the gripping of left rotation and right rotation and put down workpiece.

Preferably; Said transposition mechanical arm comprises manipulator base, first motor mount, first motor, manipulator pinion, manipulator sector gear, second motor mount, second motor, screw mandrel, goes up location-plate, manipulator installation sleeve, manipulator installing rack, manipulator assembly; Said manipulator base is arranged on the working plate; Said manipulator base, working plate pass middle standing pillar respectively; Said middle standing pillar is positioned at the center of manipulator base; Said manipulator sector gear can be rotatably set on the manipulator base; Said first motor mount is arranged on the working plate; Said first motor is arranged on first motor mount; Said manipulator pinion is located on the output shaft of first motor; Said manipulator pinion and the engagement of manipulator sector gear; Said second motor mount is arranged on the upper surface of manipulator sector gear; Said second motor is arranged on second motor mount; The upper surface of the output shaft perpendicular robotic sector gear of said second motor; The output shaft of said second motor links to each other with an end of screw mandrel; The other end of said screw mandrel is arranged on the location-plate; Said upward location-plate is arranged on the top of middle standing pillar; Said manipulator installation sleeve can rotate around middle standing pillar, and said manipulator installation sleeve is set on the screw mandrel simultaneously, can move up and down with screw mandrel; Said manipulator installing rack is arranged on a sidepiece of manipulator installation sleeve; Said manipulator assembly is arranged on the manipulator installing rack.

Preferably, said manipulator assembly comprises cylinder, left manipulator, right manipulator, cylinder piston rod, hinge block, limited block, chute; Said cylinder is fixed on the manipulator installing rack; Said left manipulator passes through the hinge block hinge on the cylinder piston rod in cylinder left side; Said right manipulator passes through the hinge block hinge on the cylinder piston rod on cylinder right side; 2 arc chutes are set on the said limited block; Said left manipulator is provided with a bearing pin, snaps in the chute in limited block left side; Said right manipulator is provided with a bearing pin, snaps in the chute on limited block right side; When cylinder piston rod stretched out, left manipulator, right manipulator were in releasing orientation; When cylinder piston rod shrank, left manipulator, right manipulator were in the state of tightening up.

Preferably, every group of combination that comprises two group leader's connecting rods and bent connecting rod of said toggle mechanism; The combination of said two group leader's connecting rods and bent connecting rod is along the radially alternate setting of working plate; The top of said long connecting rod and upper bed-plate hinge, the bottom of said bent connecting rod and lower bottom base hinge; The bottom of said long connecting rod and the upper hinge of bent connecting rod; Said every group leader's connecting rod links to each other through middle contiguous block with the hinge place of bent connecting rod; One end, the travel(l)ing rest of said centre contiguous block are distinguished the two ends of hinge at same short connecting rod.

Preferably, said support platen is provided with knock-pin, and each mould station correspondence is provided with a knock-pin; When toggle mechanism drive working plate moved downward, knock-pin partly ejected counterdie with the molded workpiece in the counterdie on the mould station.

Preferably, all there is a toggle mechanism below of said each counterdie.

Preferably, be evenly distributed with 6 or 4 on the said upper cylinder platen upper surface circumferencial direction and go up hydraulic cylinder.

Preferably, said upper cylinder platen is provided with rotatable handwheel; Pinion is arranged at said handwheel top; Circumferencial direction is uniformly distributed with 3 screw rods around the said upward hydraulic cylinder; Said screw rod lower end is the flanging platen fixedly; The below of said flanging platen is patrix fixedly; Gear wheel is arranged at the top of said 3 screw rods, and said pinion and gear wheel engagement are provided with.

Because the utilization of technique scheme, the utility model compared with prior art has advantage:

The multi-station hydraulic stretching-machine of the described band transposition mechanical arm of the utility model; Flexible high; The mould that can adapt to differing heights in the certain limit; Can realize product of six station processing, also can lay the mould of two cover workpiece, and realize the loading and unloading of middle a certain station at six stations; The liftout system is simply effective, does not have more transmission mechanism, but can realize ejecting automatically of workpiece, is convenient to realize automation, and all processing is full-automatic, need not manually-operated fully, has improved the security of system, and efficient is high, and the converted products quality is high.Simple in structure, higher to the stretching depth of product than traditional multiple position press, machinable product scope is big.Simultaneously, the utility model scheme is utilized being meshing with each other of manipulator pinion and manipulator sector gear to rotate and is realized the left rotation and right rotation of manipulator installation sleeve, thereby reaches the left rotation and right rotation of control manipulator assembly; Utilize the rotation of the second driven by motor screw mandrel to regulate the height up and down of manipulator installation sleeve, thereby reach the height up and down of control manipulator assembly; Simultaneously, control tightening up, unclamping of left manipulator, right manipulator through cylinder, the utility model is easy to operate freely, flexibility is high.

Description of drawings

Below in conjunction with accompanying drawing the utility model technical scheme is described further:

Fig. 1 is the complete section figure of front view of the multi-station hydraulic stretching-machine of the described band transposition mechanical arm of the utility model;

Fig. 2 be the described band transposition mechanical arm of the utility model the multi-station hydraulic stretching-machine vertical view partly cut open figure;

Fig. 3 is the sketch map of the transposition mechanical arm part in the multi-station hydraulic stretching-machine of the described band transposition mechanical arm of the utility model;

Fig. 4 be the transposition mechanical arm in the multi-station hydraulic stretching-machine of the described band transposition mechanical arm of the utility model the manipulator assembly tighten up view;

Fig. 5 is the releasing orientation sketch map of the manipulator assembly of the transposition mechanical arm in the multi-station hydraulic stretching-machine of the described band transposition mechanical arm of the utility model.

Wherein, 1, go up hydraulic cylinder; 2, upper cylinder platen; 3, middle standing pillar; 4, circumference column; 5, working plate; 6, support platen; 7, base; 8, following hydraulic cylinder; 9, toggle mechanism; 10, counterdie; 11, patrix; 12, handwheel; 13, pinion; 14, gear wheel; 15, screw rod; 16, long connecting rod; 17, lower bottom base; 18, middle connecting plate; 19, short connecting rod; 20, upper bed-plate; 21, piston rod; 22, travel(l)ing rest; 23, knock-pin; 24, bent connecting rod; 25, transposition mechanical arm; 31, manipulator base; 32, first motor mount; 33, first motor; 34, manipulator pinion; 35, manipulator sector gear; 36, second motor mount; 37, second motor; 38, screw mandrel; 39, go up location-plate; 40, manipulator installation sleeve; 41, manipulator installing rack; 42, manipulator assembly; 43, cylinder; 44, left manipulator; 45, right manipulator; 46, cylinder piston rod; 47, hinge block; 48, limited block; 49, chute.

The specific embodiment

The multi-station hydraulic stretching-machine that is depicted as the described band transposition mechanical arm of the utility model like accompanying

drawing

1,2 is six station hydraulic tensioners, and its upper cylinder platen 2 upper surface circumferencial directions are uniformly distributed with six and go up hydraulic cylinder 1; This six stations hydraulic tensioner; Also comprise and be fixed in ground base 7; Be fixed in the support platen 6 on the base 7; Middle standing pillar 3 and six circumference columns 4 are arranged between upper cylinder platen 2 and support platen 6, and simultaneously, middle standing pillar 3 and six circumference columns 4 support upper cylinder platen 2 and working plate 5; Six go up hydraulic cylinder 1 corresponding respectively the mould station on working plate 5, place counterdie 10 on the mould station.Said upper cylinder platen 2 is provided with six rotatable handwheels 12; Said handwheel 12 tops are provided with pinion 13; Circumferencial direction is uniformly distributed with 3 screw rods 15 around the hydraulic cylinder 1 on each, and gear wheel 14 is arranged at the top of said 3 screw rods 15, and said pinion 13 is provided with gear wheel 14 engagements.Screw rod 15 lower ends are flanging platen (not marking) fixedly, fixing patrix 11 on the said flanging platen.When rotating handwheel 12; Through the transmission of pinion 13, three screw rods 15 are rotated, because position relative fixed on gear wheel 14 and upper cylinder platen 2 vertical directions with gear wheel 14; Therefore under the effect of spiral; Screw rod 15 is rectilinear motion up and down, moves up and down thereby drive patrix 11, therefore can reach the height of regulating patrix 11 as required.Between said support platen 6 and the working plate 5 toggle mechanism 9 is arranged, said toggle mechanism 9 comprises short connecting rod 19, long connecting rod 16, bent connecting rod 24, upper bed-plate 20, lower bottom base 17, travel(l)ing rest 22, hydraulic cylinder 8 down; Said upper bed-plate 20 is separately fixed on working plate 5 and the support platen 6 with lower bottom base 17; The top of said long connecting rod 16 and upper bed-plate 20 hinges, the bottom of said bent connecting rod 24 and lower bottom base 17 hinges; The upper hinge of the bottom of said long connecting rod 16 and bent connecting rod 24; The two ends of said short connecting rod 19 respectively with long connecting rod 16 hinge place, travel(l)ing rest 22 hinges with bent connecting rod 24; Said travel(l)ing rest 22 links to each other with the piston rod 21 of following hydraulic cylinder 8.9 every groups of combinations that comprise two group leader's connecting rods 16 and bent connecting rod 24 of the mechanism of toggle described in this enforcement; The combination of said two group leader's connecting rods 16 and bent connecting rod 24 is along the radially alternate setting of working plate 5; The top of said long connecting rod 16 and upper bed-plate 20 hinges, the bottom of said bent connecting rod 24 and lower bottom base 17 hinges; The upper hinge of the bottom of said long connecting rod 16 and bent connecting rod 24; Said every group leader's connecting rod 16 links to each other through middle contiguous block 18 with the hinge place of bent connecting rod 24; One end, the travel(l)ing rest 22 of said centre contiguous block 18 are distinguished the two ends of hinges at same short connecting rod 19.All there is a toggle mechanism 9 below of each counterdie 10.When said hydraulic cylinder 8 down moves up and down through piston rod 21 drive travel(l)ing rests 22; Short connecting rod 19, long connecting rod 16 move under the drive of travel(l)ing rest 22; When travel(l)ing rest 22 arrived peak, long connecting rod 16 was in vertical position with bent connecting rod 24; This moment, toggle mechanism 9 was in the dead-centre position, therefore can be in drawing process firm support working plate 5.After the end that stretches, travel(l)ing rest 22 moves downward, and the dead-centre position of toggle mechanism 9 is destroyed, and working plate 5 moves downward under the drive of toggle mechanism 9.Therefore, through the boosting function of toggle mechanism 9, the less following hydraulic cylinder 9 of tonnage can drive working plate 5 and move up and down, and in the time of matched moulds, enough mold clamping forces is provided.Said support platen 6 is provided with knock-pin 23, and each counterdie 10 correspondence is provided with a knock-pin 23; When crank mechanism 9 drive working plates 5 moved downward, knock-pin 23 partly ejected counterdie 10 with the molded workpiece in the counterdie 10.

Use the described six station hydraulic tensioners of present embodiment, when stretching operation, on one of them counterdie 10, place tablet; Following hydraulic cylinder 8 motions drive working plate 5 and move upward, with patrix 11 matched moulds; Go up hydraulic cylinder 1 for six and move respectively, each station stretches to workpiece respectively; Stretch after the completion, go up hydraulic cylinder 1 backhauls respectively for six; Following hydraulic cylinder 8 moves simultaneously and drives working plate 5 and move downward, and opens in 11 minutes with patrix, and knock-pin 23 partly ejects counterdie 10 with the molded workpiece in the counterdie 10 simultaneously, realizes an operation cycle.

The quantity of hydraulic cylinder can be adjusted according to actual needs on the above embodiment, such as 4 hydraulic cylinders only are set.

Shown in accompanying drawing 1-5, said transposition mechanical arm 24 is arranged on the working plate 5, but the gripping of left rotation and right rotation and put down workpiece.Said transposition mechanical arm 24 comprises manipulator base 31, first motor mount 32, first motor 33, manipulator pinion 34, manipulator sector gear 35, second motor mount 36, second motor 37, screw mandrel 38, goes up location-plate 39, manipulator installation sleeve 40, manipulator installing rack 41, manipulator assembly 42; Said manipulator base 31 is arranged on the working plate 5; Said middle standing pillar 3 passes manipulator base 31, working plate 5 is provided with, and is positioned at the center of manipulator base 31; Said manipulator sector gear 35 can be rotatably set on the manipulator base 31; Said first motor mount 32 is arranged on the working plate 5; Said first motor 33 is arranged on first motor mount 32; Said manipulator pinion 34 is located on the output shaft of first motor 33; Said

manipulator pinion

34 and 35 engagements of manipulator sector gear; Said second motor mount 36 is arranged on the upper surface of manipulator sector gear 35; Said second motor 37 is arranged on second motor mount 36; The upper surface of the output shaft perpendicular robotic sector gear 35 of said second motor 37; The output shaft of said second motor 37 links to each other with an end of screw mandrel 38; The other end of said screw mandrel 38 is arranged on the location-plate 39; Said upward location-plate 39 is arranged on the top of middle standing pillar 3; Said manipulator installation sleeve 40 can be around middle standing pillar 3 rotations, and said manipulator installation sleeve 40 is set on the screw mandrel 38 simultaneously, can move up and down with screw mandrel 38; Said manipulator installing rack 41 is arranged on a sidepiece of manipulator installation sleeve 40; Said manipulator assembly 42 is arranged on the manipulator installing rack 41.Said manipulator assembly 42 comprises cylinder 43, left manipulator 44, right manipulator 45, cylinder piston rod 46, hinge block 47, limited block 48, chute 49; Said cylinder 43 is fixed on the manipulator installing rack 41; Said left manipulator 44 passes through hinge block 47 hinges on the oil cylinder piston bar 46 in cylinder 43 left sides; Said right manipulator 45 passes through hinge block 47 hinges on the oil cylinder piston bar 46 on cylinder 43 right sides; 2 arc chutes 49 are set on the said limited block 48; Said left manipulator 44 is provided with a bearing pin (not marking), snaps in the chute 49 in limited block 48 left sides; Said right manipulator 45 is provided with a bearing pin (not marking), snaps in the chute 49 on limited block 48 right sides; When oil cylinder projecting shaft 46 stretched out, left manipulator 44, right manipulator 45 were in releasing orientation, shown in accompanying drawing 5; When oil cylinder piston bar 46 shrank, left manipulator 44, right manipulator 45 were in the state of tightening up, shown in accompanying drawing 4.

Certainly, cylinder 43 also can change small oil tank into.

The multi-station hydraulic stretching-machine of the described band transposition mechanical arm of the utility model; Flexible high; The mould that can adapt to differing heights in the certain limit; Can realize product of six station processing, also can lay the mould of two cover workpiece, and realize the loading and unloading of middle a certain station at six stations; The liftout system is simply effective, does not have more transmission mechanism, but can realize ejecting automatically of workpiece, is convenient to realize automation, and all processing is full-automatic, need not manually-operated fully, has improved the security of system, and efficient is high, and the converted products quality is high.Simple in structure, higher to the stretching depth of product than traditional multiple position press, machinable product scope is big.Simultaneously, the utility model scheme utilizes the mutual rotation of manipulator pinion and manipulator sector gear to realize the left rotation and right rotation of manipulator installation sleeve, thereby reaches the left rotation and right rotation of control manipulator assembly; Utilize the rotation of the second driven by motor screw mandrel to regulate the height up and down of manipulator installation sleeve, thereby reach the height up and down of control manipulator assembly; Simultaneously, control tightening up, unclamping of left manipulator, right manipulator through cylinder, the utility model is easy to operate freely, flexibility is high.

Below only be the concrete exemplary applications of the utility model, the protection domain of the utility model is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the utility model rights protection scope.

Claims

1. the multi-station hydraulic stretching-machine with transposition mechanical arm comprises base, support platen, upper cylinder platen, middle standing pillar, circumference column, transposition mechanical arm; Said base fixes on the ground; Said support platen is fixed on the base; Said middle standing pillar and circumference column are separately positioned on and support upper cylinder platen and working plate between upper cylinder platen and the support platen, it is characterized in that: be distributed with a plurality of hydraulic cylinders of going up on the said upper cylinder platen upper surface circumferencial direction; Between said support platen and the working plate toggle mechanism is arranged; Corresponding position of going up hydraulic cylinder is provided with the mould station on the said working plate; Said toggle mechanism comprises short connecting rod, long connecting rod, bent connecting rod, upper bed-plate, lower bottom base, travel(l)ing rest, hydraulic cylinder down; Said upper bed-plate and lower bottom base are separately fixed on working plate and the support platen; The top of said long connecting rod and upper bed-plate hinge, the bottom of said bent connecting rod and lower bottom base hinge; The bottom of said long connecting rod and the upper hinge of bent connecting rod; The two ends of said short connecting rod respectively with hinge place, the travel(l)ing rest hinge of long connecting rod and bent connecting rod; Said travel(l)ing rest links to each other with the piston rod of following hydraulic cylinder; Said transposition mechanical arm is arranged on the working plate, but the gripping of left rotation and right rotation and put down workpiece.

2. the multi-station hydraulic stretching-machine of band transposition mechanical arm according to claim 1; It is characterized in that: said transposition mechanical arm comprises manipulator base, first motor mount, first motor, manipulator pinion, manipulator sector gear, second motor mount, second motor, screw mandrel, goes up location-plate, manipulator installation sleeve, manipulator installing rack, manipulator assembly; Said manipulator base is arranged on the working plate; Said manipulator base, working plate pass middle standing pillar respectively; Said middle standing pillar is positioned at the center of manipulator base; Said manipulator sector gear can be rotatably set on the manipulator base; Said first motor mount is arranged on the working plate; Said first motor is arranged on first motor mount; Said manipulator pinion is located on the output shaft of first motor; Said manipulator pinion and the engagement of manipulator sector gear; Said second motor mount is arranged on the upper surface of manipulator sector gear; Said second motor is arranged on second motor mount; The upper surface of the output shaft perpendicular robotic sector gear of said second motor; The output shaft of said second motor links to each other with an end of screw mandrel; The other end of said screw mandrel is arranged on the location-plate; Said upward location-plate is arranged on the top of middle standing pillar; Said manipulator installation sleeve can rotate around middle standing pillar, and said manipulator installation sleeve is set on the screw mandrel simultaneously, can move up and down with screw mandrel; Said manipulator installing rack is arranged on a sidepiece of manipulator installation sleeve; Said manipulator assembly is arranged on the manipulator installing rack.

3. the multi-station hydraulic stretching-machine of band transposition mechanical arm according to claim 2 is characterized in that: said manipulator assembly comprises cylinder, left manipulator, right manipulator, cylinder piston rod, hinge block, limited block, chute; Said cylinder is fixed on the manipulator installing rack; Said left manipulator passes through the hinge block hinge on the cylinder piston rod in cylinder left side; Said right manipulator passes through the hinge block hinge on the cylinder piston rod on cylinder right side; 2 arc chutes are set on the said limited block; Said left manipulator is provided with a bearing pin, snaps in the chute in limited block left side; Said right manipulator is provided with a bearing pin, snaps in the chute on limited block right side; When cylinder piston rod stretched out, left manipulator, right manipulator were in releasing orientation; When cylinder piston rod shrank, left manipulator, right manipulator were in the state of tightening up.

4. the multi-station hydraulic stretching-machine of band transposition mechanical arm according to claim 1 is characterized in that: every group of combination that comprises two group leader's connecting rods and bent connecting rod of said toggle mechanism; The combination of said two group leader's connecting rods and bent connecting rod is along the radially alternate setting of working plate; The top of said long connecting rod and upper bed-plate hinge, the bottom of said bent connecting rod and lower bottom base hinge; The bottom of said long connecting rod and the upper hinge of bent connecting rod; Said every group leader's connecting rod links to each other through middle contiguous block with the hinge place of bent connecting rod; One end, the travel(l)ing rest of said centre contiguous block are distinguished the two ends of hinge at same short connecting rod.

5. the multi-station hydraulic stretching-machine of band transposition mechanical arm according to claim 1 is characterized in that: said support platen is provided with knock-pin, and each mould station correspondence is provided with a knock-pin; When toggle mechanism drive working plate moved downward, knock-pin partly ejected counterdie with the molded workpiece in the counterdie on the mould station.

6. the multi-station hydraulic stretching-machine of band transposition mechanical arm according to claim 5 is characterized in that: all there is a toggle mechanism below of said each counterdie.

7. the multi-station hydraulic stretching-machine of band transposition mechanical arm according to claim 1 is characterized in that: be evenly distributed with 6 or 4 on the said upper cylinder platen upper surface circumferencial direction and go up hydraulic cylinder.

8. according to the multi-station hydraulic stretching-machine of the described band transposition mechanical arm of one of claim 1-7, it is characterized in that: said upper cylinder platen is provided with rotatable handwheel; Pinion is arranged at said handwheel top; Circumferencial direction is uniformly distributed with 3 screw rods around the said upward hydraulic cylinder; Said screw rod lower end is the flanging platen fixedly; The below of said flanging platen is patrix fixedly; Gear wheel is arranged at the top of said 3 screw rods, and said pinion and gear wheel engagement are provided with.