CN203665980U - Multi-connection-rod double-point press machine - Google Patents

Abstract

The utility model relates to a multi-connection-rod double-point press machine which comprises a crankshaft, a connection rod set, a sliding block and a guide rail. The press machine is characterized in that the connection rod set comprises a first connection rod, an upper elbow rod and a lower elbow rod, a first connection point of the first connection rod is movably connected with a connection point A of the crankshaft, a second connection point of the first connection rod is movably connected with a first connection point B of the upper elbow rod, a second connection point D of the upper elbow rod is movably connected with a first connection point of the lower elbow rod, a second connection point of the lower elbow rod is movably connected with a connection point E of the sliding block, a third connection point C of the upper elbow rod is movably connected with a machine body of the press machine, the angle theta of the upper elbow rod is larger than zero, and the included angle between a straight line section OC and a straight line section CE is larger than or equal to 90 degrees. The press machine achieves the technical effect of being capable of accurately punching a medium-thickness plate.

Description

Many connecting rods two-point press

Technical field

The utility model relates to press technologies field, relate in particular to many connecting rods two-point press, it comprises bent axle, connection rod set, slide block and guide rail, wherein, described bent axle rotates, and drive described connection rod set motion, and described connection rod set drives described slide block along described guide rail movement by means of being flexibly connected some E; Described bent axle is rotatably supported in the tie point O place of the fuselage of described forcing press, and described guide rail is fixed on the fuselage of described forcing press.

Background technology

Existing toggle structural pressure machine is in the time of stamping-out cut deal, and section all has the tear-strap of 2/3 left and right, and workpiece all will further be processed, and increasing operation affects the production efficiency of enterprise.Therefore, accurately punching press cut deal is the technical issues that need to address.

The open many link gearings of forcing press double-crank of patent documentation CN2710884 relate to a kind of punching machine.Its technical pattern is that eccentric bushing (2) is fixed in fuselage, gear wheel (1) is housed on cylindrical, endoporus is equipped with driven crank (3), the tie point of driven crank (3) is fixed with lever (4), the other end of lever (4) is flexibly connected with one end of push rod (6) by connecting pin (5), the other end of push rod (6) is flexibly connected with the steady pin (7) on fixing gear wheel (1) end face, said structure can make the running speed of sliding block of gap-framepress realize deep drawn, the multiple Sheet Metal Forming Technology such as cold extrusion needs, and can improve equipment productivity, there is noise low, the advantages such as long service life.

Patent documentation CN2815676 is the double-crank multi-rod transmission mechanism of forcing press openly, relates to the technical field of structures of forcing press.Comprise frame, be arranged in slide block guide rail in frame, be engaged in the slide block in slide block guide rail, the connecting rod, motor, the reducing gear that are connected with slide block, it is characterized in that the eccentric big connecting rod that connects on the output gear wheel of reducing gear, the hinged connecting rod rest of the other end of big connecting rod, the other end of connecting rod rest is hinged a bent axle, this crankshaft eccentric connects a connecting rod, and the lower end of connecting rod and above-mentioned slide block are hinged.Design principle of the present utility model is to be connected with bent axle with gear wheel by two cranks (forcing press in the past adopts a crank), two cranks are in rotary course, relative angle changes, be equivalent to a crank of a length variations, cause angular velocity varies, bent axle is rotated sometimes fast and sometimes slow.Make press ram idle running descending fast, forcing press speed in the time approaching bottom dead centre to bottom dead centre is very slow, and backhaul is fast.

The open servo-driven multi-linkage of patent documentation CN201147993.A kind of improvement of link press driving mechanism.It comprises slide block, drive motors, is connected to the transmission mechanism between slide block and drive motors, and described drive motors is servomotor; Between slide block and forcing press, be connected by guide pillar, guide pin bushing; Described transmission mechanism comprises and is connected to support link with it of forcing press, is connected to crank on servomotor, is connected to connecting rod and toggle link on slide block guide post; Toggle link has output arm and support arm, and support arm arm end and support link are hinged, and output arm arm end and connecting rod are hinged, and elbow bent angle and crank are hinged.The utility model reduces transmission system required torque, can realize ram speed control and hovering at an arbitrary position, and can control arbitrarily moving up and down of slide block, can realize the numerical control of slide block by controlling servomotor.

Patent documentation CN102695605A discloses a kind of forcing press with direct driven crank mechanism, press line and for the production of the method for forcing press with at least one direct drive unit.At this, forcing press (21) has at least one pressure machine frame (9), the tappet (5) that is installed on the workbench in pressure machine frame and drives by means of at least one toggle (12), and on press bench (8), there is mould top (6) and mold bottom (7), wherein, at least one bent axle (1) with at least one crank-pin (2) and at least one connecting rod (3) is set as toggle (12), and direct driving crank (1) and comprise at least one rotor (10) and at least one direct drive unit of a stator (4) is arranged for the motor (14) of driving crank (1).At least stator (4) that the invention reside in motor (14) comprises at least two power delivery parts (24), power delivery part (24) is configured to independently and removable construction unit, power delivery part (24) radially arranges with respect to crank (1), and power delivery part (24) is operably connected (1394) to control module (25) by means of feeding pipe (26) individually or by portion's section ground.

Patent documentation CN102172760A discloses a kind of multi-link lever press of four servomotor parallel drives of crank input of metal forming machinery technical field, comprise: frame and parallel institution, wherein: erecting is placed in the outside of parallel institution, described parallel institution comprises: four crank input motion side chains, moving platform, output movement side chain and Punching slider, the take-off lever of every crank input motion side chain and the output movement side chain all arrangement mode on each two of and every limit symmetrical with mirror image is hinged with moving platform and Punching slider respectively, moving platform and output movement side chain are hinged, the axis of hinged place is all parallel to each other.The present invention is simple in structure, control is easy, and power and the output torque larger than existing servomotor can be provided, and can build large-tonnage servo-pressing machine.

Patent documentation CN202045893U discloses a kind of multi-bar mechanical press, and described forcing press comprises frame, crank, rocking bar, connecting rod, block stamp connecting rod and block stamp, and crank is connected by revolute pair with frame respectively with rocking bar; Crank is determined rotating speed motor and is connected with high-power, and is determined rotating speed driven by motor crank and rotated by this; Connecting rod is connected by revolute pair with crank; Connecting rod, rocking bar and block stamp connecting rod are connected with revolute pair at same place; The end of block stamp connecting rod is connected with block stamp by revolute pair, and block stamp is within fixed guide.Utilize high-power constant speed common electric machine to drive single-degree-of-freedom tandem compound mechanism, can obtain good low speed forging and rush quickreturn characteristics, forcing press is simple and compact for structure simultaneously, and cost is low.

Patent documentation CN102794916A discloses a kind of many link lever high-speeds fine press, belongs to high speed stamping processing technique field.Crank is connected with moving slide block by master connecting-rod, is four and waits long connecting rod, a rhombus of this four connecting rod compositions below moving slide block.Rhombus upper end is connected with moving slide block, and two ends, left and right are connected with an arrangement for adjusting height by fork.Rhombus lower end is connected with Punching slider by slave connecting rod.Rhombus-mechanism of the present invention makes moving slide block contrary with the movement tendency of Punching slider, has realized dynamic balancing.Meanwhile, in the time that punching press action is carried out in driven by motor crank-motion, symmetrical fork is along with crank rotates and deflects, and the inertia force of connecting rod horizontal direction is understood natural equilibrium, and can significantly reduce drift lateral thrust.And two arrangement for adjusting height both can regulate height of packing compact, can guarantee that again Punching slider keeps horizontal attitude.

Patent documentation CN201832940U discloses a kind of many link rod cold-forgings press ram device for keeping lateral force direction, it is in the time of slide block backhaul, provide a power obliquely by a pair of tilting compensating cylinder in slide block top to slide block, make slide block be close to all the time a side rails.The mismatch motion producing because of side force direction flip-flop while preventing backhaul, to improve forming accuracy and the die life of product.

Patent documentation CN201714930U discloses a kind of multi-link pressure drive mechanism and comprises forcing press or the injection machine of this mechanism, belongs to jointed gear unit field, and this multi-link pressure drive mechanism comprises linkage, drive block, slide block.Wherein linkage comprises upper elbow lever, lower elbow lever, connecting rod between elbow, intermediate connecting rod etc.Between elbow, connecting rod one end is by connecting the same intermediate connecting rod of hinge, and slide block connecting rod connects, and the other end is by the same upper elbow lever of toggle link hinge, and lower elbow lever connects, and the slide block connecting rod other end is connected with lower elbow lever with slide block by slide block hinge, and mechanism's various deformation form; Compare existing symmetrical six bar mechanism, the utility model, in the situation that guaranteeing that reinforcement effect is suitable, has improved slide block idle running speed greatly, is convenient for changing the advantages such as connecting rod changes mechanism characteristics, and mechanism's total height is low.

Above-mentioned patent documentation does not provide the technical scheme of the technical problem that solves above-mentioned accurate punching press cut deal.

Utility model content

The purpose of this utility model is to propose the technical scheme of the technical problem that solves accurate punching press cut deal.

The utility model is on traditional toggle, increase multi-link structure, make crank place stressed only for slide block place is subject to 1/4th to 1/5th of nominal pressure, greatly improve the stress of driver part, and significantly reduced the power of drive motors, and the movement locus of slide block stops 30 degree to 40 degree at bottom dead centre.The utility model is applicable to essence punching and the pressure-sizing of large-scale progressive die, and at brake block steel back, the fields such as thin type gear can replace smart impact machine to use.

For this reason, the utility model proposes many connecting rods two-point press, it comprises bent axle, connection rod set, slide block and guide rail, and wherein, described bent axle rotates, and drives described connection rod set motion, and described connection rod set drives described slide block along described guide rail movement; Described bent axle is rotatably supported in the tie point O place of the fuselage of described forcing press, and described guide rail is fixed on the fuselage of described forcing press;

It is characterized in that, described connection rod set comprises first connecting rod, upper elbow lever and lower elbow lever;

The first tie point of described first connecting rod is flexibly connected with the tie point A of described bent axle, and its second tie point is flexibly connected with the first tie point B of described upper elbow lever;

The second tie point D of described upper elbow lever is flexibly connected with the first tie point of described lower elbow lever;

The second tie point of described lower elbow lever is flexibly connected with the tie point E of described slide block;

The 3rd tie point C of described upper elbow lever is flexibly connected with the fuselage of described forcing press;

The length of the straightway BC of described upper elbow lever is greater than zero, the length of the straightway CD of described upper elbow lever is greater than zero, and, the angle θ of described upper elbow lever is greater than zero, wherein, and the line between the first tie point B that described straightway BC is described upper elbow lever and its 3rd tie point C, and, line between the 3rd tie point C that described straightway CD is described upper elbow lever and its second tie point D, and the angle θ of described upper elbow lever is the angle between described straightway BC and described straightway CD;

Angle between straightway OC and straightway CE is more than or equal to 90 degree, wherein, straightway OC is the line segment that between described tie point O and described the 3rd tie point C, straight line is connected, and described straightway CE is the line segment that between described the 3rd tie point C and described tie point E, straight line is connected.

Many connecting rods two-point press of the present utility model has reached the accurately technique effect of punching press cut deal.

Accompanying drawing explanation

With reference to accompanying drawing, feature of the present utility model, advantage and characteristic are able to better understanding by the description of the specific embodiment below, in accompanying drawing:

Fig. 1: the schematic diagram of crank press of the prior art;

Fig. 2: the schematic diagram of multi-bar mechanical press of the prior art.

Fig. 3: the schematic diagram of multi-bar mechanical press of the prior art.

Fig. 4: the schematic diagram of multi-bar mechanical press of the prior art.

Fig. 5: the schematic diagram of many connecting rods two-point press of the present utility model.

Fig. 6: the mechanics analysis figure of many connecting rods two-point press of the present utility model.

Fig. 7: in many connecting rods two-point press of the present utility model and prior art, datagram is compared in the calculating of common crank press, wherein, abscissa is bent axle pressure angle α, and ordinate is ram travel S.

In the drawings, same or similarly element use same figure notation, different elements uses different figure notations, wherein:

1. bent axle

2. first connecting rod

3. upper elbow lever

4. lower elbow lever

5. slide block

The specific embodiment

Fig. 1 illustrates a kind of double linkage mechanism by handle forcing press in prior art CN201693786U; comprise bent axle, connecting rod, slide block; described small end connects by connecting rod bearing shell and maneton dumpling; slide block two side rails are flexibly connected with the track base being fixed on by handle press frame inner side; also comprise the roller, the rolling wheel support that is separately positioned on slide block both sides, the roller support that are separately fixed at the cam of maneton both sides, lean with cam downside, be arranged on jumper bar, drift in the middle of slide block; Cam connects by roller pin and rolling wheel support upper end dumpling, and rolling wheel support both sides are fixedly connected with roller support by brace respectively, and rolling wheel support lower end puts in end roller support; Roller support is fixedly connected with slide block soil side respectively, and roller support lower end puts in slide block; Described connecting rod lower end connects by link pin and bearing and jumper bar upper end dumpling; described jumper bar middle part is arranged on by cushion blocking and reset pad in the fairlead at slide block middle part; rush king-rod lower end and be threaded with fixed cover, nut is connected with jumper bar lower end, is bearing in slide block downside by reset pad; Described drift is positioned at jumper bar downside, and drift lower end passes fixed cover lower end and slide block downside.This is typical single link lever press.

Multi-bar mechanical press generally comprise bent axle 1., connection rod set, slide block 5. and guide rail, wherein, 1. described bent axle rotates, and drives described connection rod set motion, and described connection rod set drives described slide block 5. along described guide rail movement; 1. described bent axle is rotatably supported in the tie point O place of the fuselage of described forcing press, and described guide rail is fixed on the fuselage of described forcing press.In the prior art, described connection rod set generally comprises two to four connecting rods.

The connection rod set of the disclosed multi-bar mechanical press of prior art CN201832940U shown in Fig. 2 comprises three connecting rods and two supporting-points.The technical problem that prior art CN201832940U solves is that slide block side force direction keeps.Between two fulcrums of kinematic system, there are four flexible connections.

The connection rod set of the disclosed multi-bar mechanical press of prior art CN202045893U shown in Fig. 3 comprises three connecting rods and two supporting-points.The improvements of prior art CN202045893U are the anxious function of returning of the low speed of slide block or block stamp.Between two fulcrums of kinematic system, there are four flexible connections.

The connection rod set of the disclosed multi-bar mechanical press of prior art CN201147993 shown in Fig. 4 comprises three connecting rods and two supporting-points.Prior art CN201147993 has solved the technical problem of slide block optional position hovering.Between two fulcrums of kinematic system, there are three flexible connections.The applicant's patent application CN201147993 is servo-driven multi-linkage, and the inside comprises servomotor.The utility model does not comprise servomotor, is common multi-link lever press.

Be understandable that, that term " flexible connection " herein refers to is hinged, revolute pair connects or swing and connect etc.As shown in Figure 7, described revolute pair comprises the aperture in pin and described connection rod set.

The schematic diagram of many connecting rods two-point press of the present utility model as shown in Figure 5, described connection rod set comprise first connecting rod 2., upper elbow lever 3. with lower elbow lever 4..Described first connecting rod the first tie point is 2. flexibly connected with described bent axle tie point A 1., and its second tie point is flexibly connected with described upper elbow lever the first tie point B 3..Described upper elbow lever the second tie point D is 3. flexibly connected with described lower elbow lever the first tie point 4..Described lower elbow lever the second tie point is 4. flexibly connected with described slide block tie point E 5..Described upper elbow lever the 3rd tie point C is 3. flexibly connected with the fuselage of described forcing press.The length of described upper elbow lever straightway BC is 3. greater than zero, the length of described upper elbow lever straightway CD is 3. greater than zero, and, described upper elbow lever angle θ is 3. greater than zero, wherein, described straightway BC is the line between described upper elbow lever the first tie point B and its 3rd tie point C 3., and, described straightway CD is the line between described upper elbow lever the 3rd tie point C and its second tie point D 3., and described upper elbow lever angle θ is 3. the angle between described straightway BC and described straightway CD.Angle between straightway OC and straightway CE is more than or equal to 90 degree, wherein, straightway OC is the line segment that between described tie point O and described the 3rd tie point C, straight line is connected, and described straightway CE is the line segment that between described the 3rd tie point C and described tie point E, straight line is connected.

Preferred pin ground, the angle between straightway OC and straightway CE, between 90 degree to 180, is more preferably 90 °, 95 °, 100 °, 110 °.

Angle between straightway OC and straightway CE equals the important difference between patent application CN201147993 that 90 degree are the utility model and the applicant.It is different that like this axostylus axostyle is arranged formation.Press motion curve, the many kinds of parameters such as stroke are also different.

CN201147993 compares with prior art, many connecting rods two-point press of the present utility model carries out concrete restriction to the angle between straightway OC and straightway CE, and it is only 1/4th to 1/5th technique effect of the suffered nominal pressure of slide block that discovery can reach at the stressed of crank place.

As shown in Figure 5, described upper elbow lever angle θ is 3. preferably obtuse angle.It is upper that this is conducive to that active force part is passed to supporting-point C, alleviates the stressed of supporting-point O.

Be understandable that, " two point " in term " many connecting rods two-point press " refers to the 3rd tie point C or supporting-point C and tie point O or supporting-point O.The namely meaning of many connecting rods double base point type forcing press.Due to the existence of supporting-point C, thereby share the active force that supporting-point O bears.

Design main points of the present invention are, the kinematic system such as length and the described angle θ parameter of the length of described straightway CD, described straightway BC is set, make that 1. described bent axle locate stressed only for described slide block 5. suffered nominal pressure 1/2nd to 1/8th, be preferably 1/4th to 1/5th.

Therefore, it will be appreciated by those skilled in the art that, suitably choose the kinematic system such as length and the described angle θ parameter of the length of described straightway CD, described straightway BC, as long as its value makes that 1. described bent axle locate stressed only for described slide block 5. suffered nominal pressure 1/2nd to 1/8th, all within improvement design philosophy of the present utility model.

For this reason, with reference to Fig. 6, many connecting rods two-point press of the present utility model is carried out to mechanical analysis, finds the relation between the kinematic system such as length and the described angle θ parameter of the length of described straightway CD, described straightway BC:

$P\left(\mathrm{\α}1\right):=\frac{\mathrm{Pg}\·\mathrm{CE}\left(\mathrm{\α}1\right)\·\sin \left(\mathrm{\β}\left(\mathrm{\α}1\right)\right)\·\mathrm{CD}}{\mathrm{DE}\·\mathrm{BC}\·\sin \left(\mathrm{\ω}\left(\mathrm{\α}1\right)\right)}$

Wherein:

P: described first connecting rod is 2. along its longitudinal suffered active force, and it is the function of angle [alpha] 1;

Pg: described lower elbow lever is 4. along its longitudinal suffered active force, and it is the function of angle [alpha] 1;

BC: the length of described straightway BC;

CD: the length of described straightway CD;

DE: described lower elbow lever length 4.;

CE: the length of the straightway between described the 3rd tie point C and described tie point E, it is the function of angle [alpha] 1, wherein

$\mathrm{CE}\left(\mathrm{\α}1\right):=\mathrm{CD}\·\cos \left(\mathrm{\β}\left(\mathrm{\α}1\right)\right)+\sqrt{D{E}^2-{(\mathrm{CD}\·\sin \left(\mathrm{\β}\left(\mathrm{\α}1\right)\right))}^2}$

β: the angle between described straightway CD and described straightway CE, it is the function of angle [alpha] 1, wherein,

$\mathrm{\β}\left(\mathrm{\α}1\right):=\mathrm{\θ}-(\frac{\mathrm{\π}}{2}+\mathrm{\Φ}1\left(\mathrm{\α}1\right)+\mathrm{\Φ}2\left(\mathrm{\α}1\right))$

$\mathrm{\&Phi;}2\left(\mathrm{\&alpha;}1\right):=a\cos \left[\frac{\mathrm{<figure-callout\; id="2"\; label="B\; C"\; filenames="DEST\_PATH\_HDA0000472646120000021.png,DEST\_PATH\_HDA0000472646120000031.png"\; state="\{\{state\}\}">B</figure-callout>}{C}^{}{}^2+{\left(\mathrm{AC}\left(\mathrm{\&alpha;}1\right)\right)}^2-{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="DEST\_PATH\_HDA0000472646120000021.png,DEST\_PATH\_HDA0000472646120000031.png"\; state="\{\{state\}\}">L</figure-callout>}}^2}{2\&CenterDot;\mathrm{BC}\&CenterDot;\mathrm{AC}\left(\mathrm{\&alpha;}1\right)}\right]$

$\mathrm{\&Phi;}1\left(\mathrm{\&alpha;}1\right):=a\sin \left(\frac{R\&CenterDot;\sin \left(\mathrm{\&alpha;}1\right)}{\mathrm{AC}\left(\mathrm{\&alpha;}1\right)}\right)$

ω: described straightway BC and, the angle between straightway BA, it is the function of angle [alpha] 1, wherein, described straightway BA is the line segment that between described the first tie point B and tie point A, straight line is connected, and the length of described straightway BA is L, and

$\mathrm{\&omega;}\left(\mathrm{\&alpha;}1\right):=a\cos \left[\frac{\mathrm{<figure-callout\; id="2"\; label="B\; C"\; filenames="DEST\_PATH\_HDA0000472646120000021.png,DEST\_PATH\_HDA0000472646120000031.png"\; state="\{\{state\}\}">B</figure-callout>}{C}^{}{}^2+L^2-{\left(\mathrm{AC}\left(\mathrm{\&alpha;}1\right)\right)}^2}{2\&CenterDot;\mathrm{BC}\&CenterDot;L}\right]$

$\mathrm{AC}\left(\mathrm{\&alpha;}1\right):=\sqrt{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="DEST\_PATH\_HDA0000472646120000021.png,DEST\_PATH\_HDA0000472646120000031.png"\; state="\{\{state\}\}">R</figure-callout>}}^2+O{C}^2-2\&CenterDot;R\&CenterDot;\mathrm{OC}\&CenterDot;\cos \left(\mathrm{\&alpha;}1\right)}$

Wherein, R is crank throw, and OC is the line segment length that the straight line between described tie point O and described the 3rd tie point C is connected.

α 1: the angle between straightway OC and straightway OA.

As shown in Figure 6,

$\mathrm{\&Phi;}3\left(\mathrm{\&alpha;}1\right)\text{:=asin}\left(\frac{\mathrm{OC}\&CenterDot;\sin \left(\mathrm{\&alpha;}1\right)}{\mathrm{AC}\left(\mathrm{\&alpha;}1\right)}\right)$

$\mathrm{\&Phi;}4\left(\mathrm{\&alpha;}1\right):=a\cos \left[\frac{{\left(\mathrm{AC}\left(\mathrm{\&alpha;}1\right)\right)}^2+L^2-\mathrm{<figure-callout\; id="2"\; label="B\; C"\; filenames="DEST\_PATH\_HDA0000472646120000021.png,DEST\_PATH\_HDA0000472646120000031.png"\; state="\{\{state\}\}">B</figure-callout>}{C}^{}{}^2}{2\&CenterDot;\mathrm{AC}\left(\mathrm{\&alpha;}1\right)\&CenterDot;L}\right]$

As design and calculated examples, Selecting All Parameters is as follows:

Nominal pressure (N): Pg:=200010 ³

Nominal pressure stroke (mm): s:=5

Ram travel (mm): S:=120

The number of strokes: (SPM) SP:=80

Nominal pressure angle $\mathrm{\&alpha;}1:=74\&CenterDot;\frac{\mathrm{\&pi;}}{180}$

Obtain:

PAB：＝P(α1) PAB＝3.904×10 ⁵ N

Wherein, PAB be exactly described first connecting rod 2. along its longitudinal suffered active force, also 1. suffered force component of corresponding bent axle.

Pg be exactly described lower elbow lever 4. along its longitudinal suffered active force, also 5. suffered force component of corresponding slide block.

Can draw: PAB ≈ 1/5Pg.

In calculated examples in this article, length 4. of the length of angle θ, described straightway BC, the length of described straightway CD, described lower elbow lever and the length of described straightway BA are how L chooses, is guarantee by calculating PAB ≈ >1/5Pg? this problem is to optimize by computer software, can directly draw.Computer optimization process, not within shielded design main points of the present utility model, no longer describes in detail here.

Fig. 7 illustrates that the calculating of crank press common in many connecting rods two-point press of the present utility model and prior art compares datagram.

As shown in Figure 5, described upper elbow lever shape is 3. chosen as triangle, and wherein, described vertex of a triangle corresponds to the first tie point B, the second tie point D and the 3rd tie point C.

Advantageously, the motion of described connection rod set is plane motion.Such layout can reduce mechanism complexity, guarantees that motion is reliable, and manufacturing cost is reasonable.Certainly, the motion of described connection rod set can be three-dimensional motion

Preferably, described bent axle 1., described connection rod set and the described slide block coupled movements between is 5. plane motion.The whole kinematic system of many connecting rods two-point press is done plane motion can reduce mechanism complexity, guarantees that motion is reliable, and manufacturing cost is reasonable.

Jointly form a kind of novel many connecting rods two-point press by five critical pieces such as bent axle, connecting rod, upper lower elbow lever, slide block: crank-driven link motion, connecting rod promotes upper lower elbow lever and drives slide block to move reciprocatingly.

This multi-link structure is on traditional toggle, increase multi-link structure, make crank place stressed only for slide block place is subject to 1/4th to 1/5th of nominal pressure, greatly improve the stress of driver part, and significantly reduced the power of drive motors, and the movement locus of slide block stops 30 degree to 40 degree at bottom dead centre; Be applicable to essence punching and the pressure-sizing of large-scale progressive die, at brake block steel back, the fields such as thin type gear can replace smart impact machine to use.

As shown in Figure 5 to Figure 6, this novel press machine structure comprise bent axle 1., first connecting rod 2., upper elbow lever 3., lower elbow lever 4., slide block 5..Each mechanism connects by revolute, the secondary and various known standard component of slide block, and 1. bent axle rotates promotion first connecting rod and 2. swing, and 2. 4. upper and lower toggle link be with movable slider 5. to move up and down by first connecting rod.

Patent documentation CN2710884, CN2815676, CN201147993, CN201693798U, CN201693786U, CN102695605A, CN102172760A, CN202045893U, CN102794916A, CN201832940U, CN201714930U, CN103273671A discloses the element relevant to the utility model or device, and therefore, structural relation between part, element and the parts of not mentioning in this article, position relationship, active force relation, movement relation, energy relationship, momentum relation etc. all can be understood with reference to the above-mentioned patent documentation of quoting.The technology contents of the described patent documentation of quoting herein thereby become the part of present patent application file.The in the situation that of needs, all patent documentations of having announced in the related technical field of the utility model all can provide prior art reference to present patent application.

More than describe the preferred or specific embodiment of the invention in detail.Should be appreciated that those skilled in the art just can make many modifications and variations according to the design concept of the invention without creative work.Therefore; all technical staff in the art according to the design concept of the invention on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be within the scope of the invention and/or by the determined protection domain of claims.

Claims (5)

1. more than connecting rod two-point press, it comprises bent axle, connection rod set, slide block and guide rail, wherein,

Described bent axle rotates, and drives described connection rod set motion, and described connection rod set drives described slide block along described guide rail movement; Described bent axle is rotatably supported in the tie point O place of the fuselage of described forcing press, and described guide rail is fixed on the fuselage of described forcing press;

It is characterized in that, described connection rod set comprises first connecting rod, upper elbow lever and lower elbow lever;

The first tie point of described first connecting rod is flexibly connected with the tie point A of described bent axle, and its second tie point is flexibly connected with the first tie point B of described upper elbow lever;

The second tie point D of described upper elbow lever is flexibly connected with the first tie point of described lower elbow lever;

The second tie point of described lower elbow lever is flexibly connected with the tie point E of described slide block;

The 3rd tie point C of described upper elbow lever is flexibly connected with the fuselage of described forcing press;

The length of the straightway BC of described upper elbow lever is greater than zero, the length of the straightway CD of described upper elbow lever is greater than zero, and, the angle θ of described upper elbow lever is greater than zero, wherein, and the line between the first tie point B that described straightway BC is described upper elbow lever and its 3rd tie point C, and, line between the 3rd tie point C that described straightway CD is described upper elbow lever and its second tie point D, and the angle θ of described upper elbow lever is the angle between described straightway BC and described straightway CD;

Angle between straightway OC and straightway CE is more than or equal to 90 degree, wherein, straightway OC is the line segment that between described tie point O and described the 3rd tie point C, straight line is connected, and described straightway CE is the line segment that between described the 3rd tie point C and described tie point E, straight line is connected.

2. many connecting rods two-point press according to claim 1, is characterized in that: the angle θ of described upper elbow lever (3) is obtuse angle.

3. according to the many connecting rods two-point press described in any one in claim 1 to 2, it is characterized in that: described upper elbow lever be shaped as triangle, wherein, described vertex of a triangle corresponds to the first tie point B, the second tie point D and the 3rd tie point C.

4. according to the many connecting rods two-point press described in any one in claim 1 to 2, it is characterized in that: described flexible connection is that revolute pair connects.

5. many connecting rods two-point press according to claim 4, is characterized in that: described revolute pair comprises the aperture in pin and described connection rod set.

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