Multi-connecting-rod transmission mechanism of gate-type two-point press

Abstract

The utility model discloses a multi-connecting-rod transmission mechanism of a gate-type two-point press machine in the field of press machines, which comprises a press machine body, two parallel and equal-height crankshafts are rotatably arranged on the press machine body, and a first bearing seat and a second bearing seat are arranged on the press machine body corresponding to a main transmission shaft. An eccentric shaft hole allowing the front end of the main transmission shaft to penetrate through is formed in the first bearing seat, the rear end of the main transmission shaft penetrates through the second bearing seat and is sleeved with a main gear, one side of the main gear is in transmission connection with a driving gear at the rear end of one crankshaft through an idle gear, and the other side of the main gear is in meshed connection with a driving gear at the rear end of the other crankshaft. A large gear is rotatably arranged on the periphery of the first bearing seat, the large gear is in transmission connection with a rotation driving mechanism, and a multi-connecting-rod mechanism connected with the main transmission shaft is arranged on the large gear. According to the utility model, the phenomenon that the dot distance between the two crankshafts is too small is avoided, and the unbalance loading resistance is stronger.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of press, in particular to a door type double-point press multi-connecting rod transmission mechanism. BACKGROUND

[0002] When the press works, the upper die reciprocating up and down stamps or stretches the workpiece on the lower die, the running speed of the ordinary press moves regularly according to the curve of sine wave, generally, when the press reaches the lower dead point, the upper die and the lower die collide to produce stamping force, and the blanking is realized, but the speed of the collision is fast, the impact force is large, the service life of the die will be shortened a lot, and if it is a stretching process, the workpiece will be cracked, and the production efficiency will be very low.

[0003] The emergence of multi-connecting rod structure can not only reduce the speed at the lower dead point, but also provide sufficient stamping capacity, which brings great progress to the industry, the door type double-point press multi-connecting rod mechanism adopts double-crank multi-connecting rod mechanism, and the mechanism currently has two kinds of transmission mechanisms: one is that double gears are directly engaged, and double-crank multi-connecting rod mechanism is adopted on each gear to drive the sliding block to move simultaneously; the other is that a gear adopts double-crank multi-connecting rod mechanism, and is transmitted to a crankshaft, a set of gear transmission is made at the other end of the crankshaft to give another crankshaft, so as to drive the sliding block to move.

[0004] At present, the two kinds of transmission mechanisms are widely used in the press in the market, but if the table surface of the double-point press is large, the distance between the double points is too small when the large gear directly engages, and the anti-unbalance load capacity will be poor, so the current transmission mechanism cannot meet the requirement. The utility model perfectly solves the problem. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a door type double-point press multi-connecting rod transmission mechanism, which can completely solve the problem of multi-connecting rod structure in the large table surface press, and avoid that the point distance of the two crankshafts is too small, and the anti-unbalance load capacity is stronger.

[0006] The utility model discloses a door type double-point press multi-connecting rod transmission mechanism, including the press body, the press body is provided with two parallel and equal height crankshafts rotatably, the installation space is rotatably provided with the main transmission shaft in the installation space, the axis of main transmission shaft is parallel with the crankshaft, the press body is provided with bearing seat no. 1 and bearing seat no. 2 with main transmission shaft, bearing seat no. 1 is provided with eccentric shaft hole that can contain the front end of main transmission shaft, the eccentric shaft hole is staggered with the axis of bearing seat no. 1, the rear end of main transmission shaft passes through bearing seat no. 2 and is sleeved with main gear, one side of main gear is driven gear through idler and a crankshaft rear end transmission connection, the other side of main gear is engaged with the drive gear of another crankshaft rear end, the outer periphery of bearing seat no. 1 is rotatably provided with the gear, and the gear is transmission connection with rotary drive mechanism, and the gear is equipped with the multi-connecting rod mechanism connected with main transmission shaft.

[0007] The utility model discloses the distance of two crankshafts increases, is completely applicable to double-point big mesa press service condition, when working, the flywheel body drives flywheel axle through the clutch, and flywheel axle drives the gear amplification torque, and the gear drives main transmission shaft through double-crank connecting rod mechanism variable speed, and main transmission shaft drives the drive gear and idler of crankshaft through main gear on both sides, and idler drives the drive gear of another crankshaft, and two drive gears drive two crankshafts through the key, and the crankshaft of variable speed motion drives machine tool slide to make the movement of slow down and fast return at this time, realizes big crankshaft point distance, big mesa machine bed stamping work.

[0008] Compared with the prior art, the utility model has the advantages that:

[0009] 1, through adopting a pair of double-crank connecting rod mechanism and variable speed main transmission shaft drive two side crankshaft's drive gear respectively effectively avoid the different step of double rod system caused by the meshing gap;

[0010] 2, through main gear both sides drive gear and increase idler, effectively increase the crankshaft distance of machine tool, and enlarge the stamping point distance and enhance the machine tool anti-bias load capacity;

[0011] 3, through the meshing gap of control main gear both sides meshing gear, effectively control the positive and negative rotation synchronous precision of machine tool crankshaft;

[0012] 4, main gear drives both sides gear effectively control the gear width, thereby reduce the passive inertia of transmission system, reduce the brake burden of clutch.

[0013] As a further improvement of the utility model, the idler is sleeved on the rotating shaft. The rotating shaft is rotatably supported on the press body.

[0014] As a further improvement of the utility model, the pressure machine body is provided with bearing seat three and bearing seat four corresponding to the front and rear ends of each crankshaft, the two ends of the crankshaft are rotatably supported on the corresponding bearing seat three and bearing seat four, and a connecting rod journal is arranged on the crankshaft.

[0015] As a further improvement of the utility model, the rotary driving mechanism comprises a flywheel shaft rotatably supported on the pressure machine body, the flywheel shaft is parallel to the main transmission shaft, the front and rear ends of the flywheel shaft are respectively sleeved with a flywheel body and a pinion, and the pinion is in meshing connection with the gear wheel. The flywheel drives the flywheel shaft, and the flywheel shaft drives the gear wheel to rotate and amplify the torque through the pinion.

[0016] As a further improvement of the utility model, the multi-connecting rod mechanism comprises a driving connecting rod fixedly installed at the front end of the gear wheel, and a radial driven connecting rod is fixed to the protruding end of the bearing seat one through the main transmission shaft. The end portion of the driving connecting rod is hingedly connected with the end portion of the driven connecting rod. The gear wheel drives the main transmission shaft to rotate through the double-crank connecting rod mechanism.

[0017] As a further improvement of the utility model, an embedding groove, in which the driving connecting rod can be inserted, is formed in the driven connecting rod, and the driving connecting rod is hingedly connected with the driven connecting rod through a pin shaft. The stability of the multi-connecting rod mechanism is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a perspective view of the utility model.

[0019] Fig. 2 It is a perspective view of the utility model.

[0020] Fig. 3 It is a structural schematic view of the multi-connecting rod mechanism on the gear wheel.

[0021] Among them, 1 crankshaft, 1a connecting rod journal, 2 main transmission shaft, 3 bearing seat one, 4 bearing seat two, 5 eccentric shaft hole, 6 main gear, 7 idler, 7a rotating shaft, 8 driving gear, 9 gear wheel, 10 bearing seat three, 11 bearing seat four, 12 flywheel shaft, 13 flywheel body, 14 pinion, 15 driving connecting rod, 16 driven connecting rod, 17 embedding groove, 18 pin shaft. DETAILED DESCRIPTION

[0022] As Figs. 1-3The illustrated is a door type double-point press multi-link transmission mechanism, including a press body, two parallel and equal height crankshafts 1 are rotatably arranged on the press body, bearing seat three 10 and bearing seat four 11 are arranged on the press body corresponding to the front and rear ends of each crankshaft 1, the two ends of the crankshaft 1 are rotatably supported on the corresponding bearing seat three 10 and bearing seat four 11, and a connecting rod journal 1a is arranged on the crankshaft 1; the connecting rod journal 1a of the crankshaft 1 is used for mounting a connecting rod for driving the sliding block to move up and down; a mounting space is left between the two crankshafts 1, a main transmission shaft 2 is rotatably arranged in the mounting space, the main transmission shaft 2 is parallel to the axis of the crankshaft 1, bearing seat one 3 and bearing seat two 4 are arranged on the press body corresponding to the main transmission shaft 2, an eccentric shaft hole 5 through which the front end of the main transmission shaft 2 can pass is formed in the bearing seat one 3, the eccentric shaft hole 5 is arranged staggered with the axis of the bearing seat one 3, the rear end of the main transmission shaft 2 passes through the bearing seat two 4 and is sleeved with a main gear 6, one side of the main gear 6 is in transmission connection with a driving gear 8 at the rear end of one crankshaft 1 through an idler gear 7, the idler gear 7 is sleeved on a rotating shaft 7a, and the rotating shaft 7a is rotatably supported on the press body; the other side of the main gear 6 is in meshing connection with a driving gear 8 at the rear end of the other crankshaft 1, a large gear 9 is rotatably arranged on the outer periphery of the bearing seat one 3, the large gear 9 is in transmission connection with a rotating driving mechanism, and a multi-link mechanism connected with the main transmission shaft 2 is arranged on the large gear 9.

[0023] The rotating driving mechanism includes a flywheel shaft 12 rotatably supported on the press body, the flywheel shaft 12 is parallel to the main transmission shaft 2, a flywheel body 13 and a pinion gear 14 are sleeved on the front and rear ends of the flywheel shaft 12 respectively, and the pinion gear 14 is in meshing connection with the large gear 9. The flywheel drives the flywheel shaft 12, and the flywheel shaft 12 drives the large gear 9 to rotate and amplify the torque through the pinion gear 14.

[0024] The multi-link mechanism includes a driving link 15 fixedly installed at the front end of the large gear 9, a radial driven link 16 is fixed to the protruding end of the bearing seat one 3 through the main transmission shaft 2, and the end of the driving link 15 is hingedly connected with the end of the driven link 16. The large gear 9 drives the main transmission shaft 2 to rotate through a double-crank link mechanism. An embedding groove 17 through which the driving link 15 can extend is formed in the driven link 16, and the driving link 15 is hingedly connected with the driven link 16 through a shaft 18. The stability of the multi-link mechanism is improved.

[0025] The distance between the two crankshafts 1 is increased, and the utility model is completely suitable for the working condition of double-point large table surface press, when working, the flywheel body 13 drives the flywheel shaft 12 through the clutch, the flywheel shaft 12 drives the large gear 9 to enlarge the torque, the large gear 9 drives the main transmission shaft 2 through the double-crank connecting rod mechanism, the main transmission shaft 2 drives the driving gear 8 and the idler 7 of the crankshaft 1 through the main gear 6, the idler 7 drives the driving gear 8 of the other crankshaft 1, and the two driving gears 8 drive the two crankshafts 1 through the key, at this time, the crankshaft 1 in variable speed motion drives the machine tool slide to move slowly downward and quickly return, and the double-point large crankshaft 1 and the large table surface press work are realized. Compared with the prior art, the utility model has the beneficial effects that: 1, the double-crank connecting rod mechanism and the variable speed main transmission shaft 2 are adopted to drive the driving gears 8 of the two crankshafts 1 respectively, so that the different step of the double-rod system caused by the meshing gap is effectively avoided; 2, the main gear 6 drives the gear 8 on both sides and the idler 7 is increased, so that the distance of the crankshaft 1 of the machine tool is effectively increased, the stamping point distance is enlarged, and the anti-bias load capacity of the machine tool is enhanced; 3, the meshing gap of the meshing gears on both sides of the main gear 6 is controlled, so that the forward and reverse rotation synchronous precision of the crankshaft 1 of the machine tool is effectively controlled; 4, the main gear 6 drives the gears on both sides, so that the gear width is effectively controlled, the passive inertia of the transmission system is reduced, and the braking burden of the clutch is reduced.

[0026] The utility model is very suitable for the application of the multi-connecting rod large table surface press, the point distance between the two points is large, and the utility model is suitable for single machine stamping, progressive die and multi-station stamping in the household appliance industry, the mechanism of the utility model is applied to the multi-connecting rod machine tool, the characteristic of the multi-connecting rod is that when contacting the workpiece, the press provides a low-speed stamping speed, which greatly protects the die, and the service life of the die is greatly improved, the deformation speed of the workpiece plate in stamping forming is slow, and the stretching part is not prone to cracking. The multi-connecting rod machine tool has the function of quick return, and the stamping efficiency is improved. The utility model solves the problem of asynchronization of the two crankshafts 1 of the double-point machine tool and the precision error; and solves the problem of large inertia of the transmission system, since the gear does not directly drive the crankshaft 1, the transmission inertia is greatly reduced; in this way, the power and the torque of the clutch are reduced, and the cost is controlled.

[0027] The utility model is not limited to the above-mentioned embodiments, on the basis that the technical scheme is disclosed, according to the disclosed technical content, some technical features can be replaced and deformed without creative labor, and these replacements and deformations are within the protection scope of the utility model.

Claims

1. A multi-link transmission mechanism for a gantry double-point press, comprising a press body, wherein two parallel and equal-height crankshafts are rotatably mounted on the press body, characterized in that, An installation space is provided between the two crankshafts. A main drive shaft is rotatably installed within the installation space. The main drive shaft is parallel to the axis of the crankshaft. A bearing housing 1 and a bearing housing 2 are provided on the press body corresponding to the main drive shaft. The bearing housing 1 has an eccentric shaft hole that allows the front end of the main drive shaft to pass through. The eccentric shaft hole is offset from the axis of the bearing housing 1. The rear end of the main drive shaft passes through the bearing housing 2 and is fitted with a main gear. One side of the main gear is connected to the drive gear at the rear end of one crankshaft via an idler gear. The other side of the main gear is meshed with the drive gear at the rear end of another crankshaft. A large gear is rotatably installed on the outer periphery of the bearing housing 1. The large gear is connected to a rotary drive mechanism. The large gear is equipped with a multi-link mechanism connected to the main drive shaft.

2. The multi-link transmission mechanism of a gantry double-point press according to claim 1, characterized in that, The idler wheel is fitted onto the rotating shaft.

3. A multi-link transmission mechanism for a gantry double-point press according to claim 1 or 2, characterized in that, The press body is provided with bearing housing three and bearing housing four at both ends of each crankshaft. The two ends of the crankshaft are rotatably supported on the corresponding bearing housing three and bearing housing four. The crankshaft is provided with connecting rod journal.

4. A multi-link transmission mechanism for a gantry double-point press according to claim 1 or 2, characterized in that, The rotary drive mechanism includes a flywheel shaft rotatably supported on the press body. The flywheel shaft is parallel to the main drive shaft. A flywheel body and a small gear are respectively fitted at the front and rear ends of the flywheel shaft. The small gear meshes with the large gear.

5. A multi-link transmission mechanism for a gantry double-point press according to claim 1 or 2, characterized in that, The multi-link mechanism includes a drive link fixedly mounted on the front end of a large gear, and a radial driven link fixed to the extended end of the main drive shaft passing through a bearing housing. The end of the drive link is hinged to the end of the driven link.

6. The multi-link transmission mechanism of a gantry double-point press according to claim 5, characterized in that, The driven link has an insertion groove into which the driving link can extend, and the driving link is hinged to the driven link via a pin.

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