Double-point machine tool multi-connecting-rod mechanism

Abstract

The utility model discloses a double-point machine tool multi-connecting-rod mechanism in the field of press machines, which comprises a press machine body, a first crankshaft and a second crankshaft which are parallel to each other are rotatably arranged on the press machine body, the length of the first crankshaft is larger than that of the second crankshaft, and the height of the first crankshaft is equal to that of the second crankshaft. A bearing seat used for rotatably supporting one end of a crankshaft is arranged on the press body, an eccentric shaft hole allowing one end of the crankshaft to penetrate through is formed in the bearing seat, one end of the crankshaft penetrates through the eccentric shaft hole and is fixedly provided with a first radial connecting rod, the periphery of the bearing seat is rotatably sleeved with a transmission gear, and a second connecting rod is fixed to the end face of the transmission gear. The other end of the second connecting rod is hinged to one end of the connecting rod, the other end of the first crankshaft and the other end of the second crankshaft are each provided with a large gear, and the two large gears are connected in a meshed mode. The service life of the die can be prolonged, and a workpiece is protected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of press, especially relate to a double-point machine tool multi-connecting rod mechanism. BACKGROUND

[0002] In the prior art, there is a whole frame closed double-point press, with a patent application number: 202323049727.2; application date: November 13, 2023; the structure comprises a machine body and a pressure plate, the machine body is provided with the pressure plate, symmetrical sliding blocks are arranged on both sides of the pressure plate, each sliding block is slidably connected with a guide rail, each guide rail is installed on the machine body, and an oil extraction assembly is installed on one side of each guide rail, each oil extraction assembly is connected and matched with the adjacent sliding block, an oil receiving groove is installed at the bottom end of each guide rail, a fixed block is welded on one side of the sliding block, the fixed block is connected with one end of the oil extraction assembly, an oil injection hole is formed at the top end of the guide rail, and oil discharge holes are uniformly formed on both sides of the guide rail, and the oil injection hole is communicated with each oil discharge hole.

[0003] When the press is working, the two sets of crank connecting rod mechanisms drive the sliding blocks to move up and down, and the upper die moving up and down reciprocally stamps or stretches the workpiece on the lower die, but the problem is that the running speed of the ordinary press moves regularly according to the sine wave curve, generally, the press reaches the lower dead point, the upper die and the lower die collide to generate stamping force, and the punching is realized, but the speed of the collision is fast, the impact force is large, and the service life of the die is greatly shortened, and if it is a stretching process, the workpiece will be cracked, and the production efficiency will be reduced by slowing down the speed. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a double-point machine tool multi-connecting rod mechanism, which can reduce the speed of the sliding block at the lower dead point, avoid excessive stamping force generated by the collision of the upper die and the lower die, provide sufficient stamping capacity, prolong the service life of the die, and protect the workpiece.

[0005] The utility model is realized in the following way: a double-point machine tool multi-connecting rod mechanism, comprising a press body, a crankshaft one and a crankshaft two are arranged on the press body and can rotate, the length of the crankshaft one is greater than that of the crankshaft two, the heights of the crankshaft one and the crankshaft two are equal, a bearing seat is arranged on the press body and used for rotatingly supporting the end part of the crankshaft one, an eccentric shaft hole is formed in the bearing seat and can accommodate the end part of the crankshaft one, the end part of the crankshaft one penetrates the eccentric shaft hole and is fixed with a radial connecting rod one, a transmission gear is rotatably sleeved on the outer periphery of the bearing seat, the transmission gear is fixed with a connecting rod two at the end face, the other end of the connecting rod two is hingedly connected with the end part of the connecting rod one, a large gear is arranged at the other end of the crankshaft one and the crankshaft two, and the two large gears are connected in meshing.

[0006] The utility model discloses a flywheel drives gear shaft rotation, pinion and transmission gear meshing on gear shaft, transmission gear rotates on bearing seat, the connecting rod no. 2 swing of transmission gear end face, connecting rod no. 2 and connecting rod no. 1 are connected through pin shaft, connecting rod no. 1 drives crankshaft no. 1 rotation, crankshaft no. 1 drives gear rotation, two gears mesh each other, drive crankshaft no. 2 rotation, because the back-and-forth swing stroke and back-and-forth speed of connecting rod no. 2 are different, can make the average speed of slider's working stroke small, and thus working stroke is stable, non-working stroke speed accelerates, to shorten the non-working time, reach the purpose of improving work efficiency.

[0007] As a further improvement of the utility model, the eccentric shaft hole is arranged staggered with the axis of the bearing seat.

[0008] As a further improvement of the utility model, a gear shaft is arranged corresponding to the transmission gear, the axis of the gear shaft is parallel to the axis of the crankshaft no. 1, the front and rear ends of the gear shaft are respectively sleeved with a flywheel and a pinion, and the pinion is connected with the transmission gear in meshing mode. The flywheel drives the gear shaft to rotate, and the pinion drives the transmission gear to rotate.

[0009] As a further improvement of the utility model, the transmission gear is annular. The transmission gear rotates around the outer periphery of the bearing seat.

[0010] As a further improvement of the utility model, an installation shaft is vertically arranged on the end surface of the transmission gear, an installation hole is formed in one end of the connecting rod no. 2, the installation hole is capable of allowing the installation shaft to pass through, and the connecting rod no. 2 is fixed to the installation shaft. The transmission gear drives the connecting rod no. 2 to swing.

[0011] As a further improvement of the utility model, an installation groove is formed in the connecting rod no. 1, the other end of the connecting rod no. 2 extends into the installation groove and is hingedly connected to the connecting rod no. 1 through a pin shaft. The pin shaft is arranged in the installation groove.

[0012] As a further improvement of the utility model, connecting rod journals are arranged on the crankshaft no. 1 and the crankshaft no. 2. The connecting rods are arranged on the connecting rod journals of the crankshaft no. 1 and the crankshaft no. 2, and the connecting rods drive the slider of the press machine to move up and down. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the perspective structural drawing of the utility model.

[0014] Figure 2 It is the perspective structural drawing of the utility model.

[0015] Figure 3 It is the sectional view of the connecting rod no. 2 and the connecting rod no. 1.

[0016] Figure 4 This is a diagram showing the positional relationship between crankshaft 1 and the transmission gear.

[0017] Figure 5 This is a diagram showing the positional relationship between the transmission gear and the bearing housing.

[0018] Figure 6 This is a schematic diagram of the eccentric shaft hole in the bearing housing.

[0019] Among them, 1 is the flywheel, 2 is the gear shaft, 3 is the transmission gear, 4 is the second connecting rod, 5 is the first connecting rod, 6 is the first crankshaft, 7 is the large gear, 8 is the bearing housing, 9 is the second crankshaft, 10 is the eccentric shaft hole, 11 is the small gear, 12 is the mounting shaft, 13 is the mounting groove, 14 is the pin, 15 is the connecting rod journal, and 16 is the protective cover. Detailed Implementation

[0020] like Figures 1-6 The diagram illustrates a multi-link mechanism for a dual-point machine tool, comprising a press body. Two crankshafts, a first crankshaft 6 and a second crankshaft 9, are rotatably mounted on the press body, parallel to each other. The length of the first crankshaft 6 is greater than the length of the second crankshaft 9, and the heights of the first crankshaft 6 and the second crankshaft 9 are equal. The press body is provided with a bearing seat 8 for rotatably supporting the end of the first crankshaft 6. An eccentric shaft hole 10 is provided on the bearing seat 8 to allow the end of the first crankshaft 6 to pass through. The eccentric shaft hole 10 is offset from the axis of the bearing seat 8. A radial connecting rod 5 is fixed to the end of the first crankshaft 6 through the eccentric shaft hole 10. A transmission gear 3, which is annular, is rotatably fitted around the outer circumference of the bearing seat 8. The driving gear 3 rotates around the outer circumference of the bearing housing 8; a connecting rod 4 is fixed to the end face of the transmission gear 3, and a mounting shaft 12 is vertically provided on the end face of the transmission gear 3. One end of the connecting rod 4 has a mounting hole through which the mounting shaft 12 can pass. The connecting rod 4 is fixed to the mounting shaft 12, and the transmission gear 3 drives the connecting rod 4 to swing; the other end of the connecting rod 4 is hinged to the end of the connecting rod 5. A mounting groove 13 is provided on the connecting rod 5, and the other end of the connecting rod 4 extends into the mounting groove 13 and is hinged to the connecting rod 5 via a pin 14. The pin 14 is located in the mounting groove 13; the other ends of the crankshaft 6 and the crankshaft 9 are both provided with large gears 7, and the two large gears 7 are meshed and connected. Both the crankshaft 6 and the crankshaft 9 are provided with connecting rod journals 15. Connecting rods are installed on the connecting rod journals 15 of the crankshaft 6 and the crankshaft 9, and the slide of the press is driven to move up and down through the two connecting rods.

[0021] A gear shaft 2 is provided corresponding to the transmission gear 3. The gear shaft 2 is parallel to the axis of the crankshaft 6. A flywheel 1 and a pinion 11 are respectively fitted at the front and rear ends of the gear shaft 2. The pinion 11 is meshed with the transmission gear 3. The flywheel 1 drives the gear shaft 2 to rotate, and the pinion 11 drives the transmission gear 3 to rotate.

[0022] The utility model discloses a flywheel 1 drives gear shaft 2 to rotate, pinion 11 on gear shaft 2 is engaged with transmission gear 3, transmission gear 3 rotates on bearing seat 8, and bearing seat 8 outer periphery is equipped with the shroud 16, and the connecting rod two 4 of transmission gear 3 end face swings, and the connecting rod two 4 is connected with the connecting rod one 5 through the pin shaft 14, and the connecting rod one 5 drives the crankshaft one 6 to rotate, and the crankshaft one 6 drives the rotation of the big gear 7, and two big gears 7 are engaged with each other, and drive the rotation of the crankshaft two 9, because the back-and-forth swing stroke of the connecting rod two 4 and the back-and-forth speed are different, can make the average speed of the working stroke of the sliding block small, and thus the working stroke is stable, and the non-working stroke speed is accelerated, to shorten the non-working time, reach the purpose of improving the work efficiency.

[0023] The utility model discloses not limited to the above-mentioned embodiment, on the basis of the technical scheme disclosed in the utility model, the skilled in the art can make some replacement and deformation to some technical features in the disclosed technical content without creative labor, and these replacement and deformation are all within the protection scope of the utility model.

Claims

1. A double-point machine tool multi-link mechanism comprising a press body, on which are rotatably provided crankshaft one and crankshaft two which are parallel to each other, characterized in that, The length of the first crankshaft is greater than that of the second crankshaft, the height of the first crankshaft and the second crankshaft is equal, the press body is provided with a bearing seat for rotatingly supporting the end of the first crankshaft, the bearing seat is provided with an eccentric shaft hole through which the end of the first crankshaft passes, the end of the first crankshaft passes through the eccentric shaft hole and is fixed with a radial connecting rod I, the outer periphery of the bearing seat is rotatably sleeved with a transmission gear, the end surface of the transmission gear is fixed with a connecting rod II, the other end of the connecting rod II is hingedly connected with the end of the connecting rod I, the other end of the first crankshaft and the second crankshaft is provided with a large gear, and the two large gears are engagedly connected.

2. A double-point machine tool multi-link mechanism according to claim 1, characterized by The eccentric shaft hole is arranged in a staggered manner with the axis of the bearing seat.

3. A double-point machine tool multi-link mechanism according to claim 1 or 2, characterized in that, A gear shaft is arranged corresponding to the transmission gear, the gear shaft is parallel with the axis of the first crankshaft, the front and rear ends of the gear shaft are respectively sleeved with a flywheel and a pinion, and the pinion is engagedly connected with the transmission gear.

4. A double-point machine tool multi-link mechanism according to claim 1 or 2, characterized in that, The transmission gear is annular.

5. A double-point machine tool multi-link mechanism according to claim 1 or 2, characterized in that, The end surface of the transmission gear is vertically provided with a mounting shaft, one end of the connecting rod II is provided with a mounting hole through which the mounting shaft passes, and the connecting rod II is fixed with the mounting shaft.

6. A double-point machine tool multi-link mechanism according to claim 1 or 2, characterized by The connecting rod I is provided with a mounting groove, the other end of the connecting rod II extends into the mounting groove and is hingedly connected with the connecting rod I through a pin shaft.

7. A double-point machine tool multi-link mechanism according to claim 1 or 2, characterized by The first crankshaft and the second crankshaft are both provided with a connecting rod journal.

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