KR100852998B1 - Structure for eccentric shaft of press machine - Google Patents

Abstract

A coupling structure for an eccentric shaft of a press machine is provided to reduce weight of a balance weight used for eliminating unbalance due to an eccentric part by reducing the weight of the eccentric part as possible. A coupling structure for an eccentric shaft of a press machine comprises a driving part(40) having an eccentric shaft(41), which is coupled to a frame(70), a clutch part(20) interposed between the driving part and a flywheel to transmit or block torque of the driving part relative to the flywheel, and a brake part(30) to stop the operation of the driving part. One side of the eccentric shaft extends through a flywheel(10). The center portion of the driving part is provided with a knuckle mechanism unit to ascend/descend a slider(60). The clutch part and the brake part are supported by bearings(25,35) between the eccentric shaft and the flywheel.

Description

Structure for eccentric shaft of press machine

1 is a plan view showing the assembly of the drive unit of the conventional press machine.

Figure 2 is a plan view showing an eccentric shaft coupling structure of the press machine according to the present invention.

Figure 3 is a side view showing the eccentric shaft coupling structure of the press machine according to the present invention.

4 and 5 are reference views showing the eccentric shaft of the press machine according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: flywheel 20: clutch portion

21: wheel cover 22: clutch

23: bearing retainer 24: cylinder

25: bearing 30: brake

31: brake break 32: brake plate

33: bearing 34: wheel supporter

35: bearing 40: drive part

41: eccentric shaft 411: eccentric body

412: eccentric drum 413: coupler

414: bolt 42: balance weight

43: connecting rod metal 44: connecting rod

45: front metal 46: crank supporter

50: knuckle mechanism 51: upper link pin

52: uplink pin metal 53: uplink

54: middle pin 55: Harlink

56: middle pin metal 57: harlink pin

58: harlink pin metal 60: slide

61: plunger 62: plunger guide

63: adjusting screw 64: adjusting nut

65: slide adjuster 70: frame

The present invention relates to an eccentric shaft coupling structure of a press machine, and more particularly to an eccentric shaft coupling structure of a press machine used as a key component of the mechanical press drive unit.

In general, the press machine is provided with a slide which is moved up and down by receiving the driving force of the motor, the upper mold of the mold for manufacturing a predetermined product is fixed to the lower surface of the slide, the lower mold of the mold is fixed to the upper bolster upper surface of the upper mold Then, by placing a material such as metal on the lower mold and the slide is lowered to produce a product having a desired shape and dimensions while compressing or cutting the material located between the upper and lower molds.

1 is a plan view showing a drive assembly of a conventional press machine, the press machine is provided with a drive unit 240 including a crankshaft 241 around the frame 270, connecting the rotation of the drive unit 240 The clutch unit 220 for stopping or breaking, and the brake unit 230 for stopping the operation of the driving unit 240 are provided at one side of the driving unit 240, and in the middle of the crank shaft 241 of the driving unit 240. The slide 260 is connected.

However, the drive unit of the prior art as described above is a very important part of strength in the manufacture of press machines, especially the crankshaft operated in the harsh conditions subjected to bending and torsional load is complicated in shape, high strength is required to go through several processes in manufacturing In comparison with the weight of the material, the amount of processing is high, the processing cost is high, the cost of the material is expensive, and if not properly manufactured, problems such as an accident of breaking the crankshaft occur.

In order to solve the problems described above, in the present invention, the eccentric shaft can be applied to the driving unit of the press machine to reduce the weight and processing amount of the material compared to the crank shaft, and to eliminate the structurally fragile crank-shaped pin portion and the eccentric shaft. By changing the shape, the strength can be increased compared to the crankshaft.In addition, the eccentric shaft of special cast steel is applied instead of the eccentric shaft of forged products or special steel material, so that the weight of the eccentric portion can be made to be small at the time of making wooden dies, so that unbalance due to the eccentric portion can be achieved. It is an object of the present invention to provide an eccentric shaft coupling structure of a press machine for reducing the weight of a balance weight to be eliminated.

In the structure to achieve the purpose,

Power generated from the motor is transmitted to the flywheel via the pulley and the belt, and the flywheel includes a clutch part for regulating the connection of power and a brake part for stopping the rotation of the driving part, and the flywheel is formed by the clutch part and the brake part. In the eccentric shaft coupling structure of the press machine to drive the drive unit is driven by the power of the eccentric shaft, the drive unit is composed of an eccentric shaft, one side of the eccentric shaft penetrates into the flywheel, but is supported by a bearing between the eccentric shaft and the flywheel A clutch part and a brake part are provided, and the bearing is supported on the frame through a wheel supporter, and a connecting rod is provided at the center of the eccentric shaft to change the rotational movement of the eccentric shaft into a linear movement with a connecting rod metal interposed therebetween. The slide is lifted and lowered by the rod, and the other side of the eccentric shaft Supported by the front metal, the front metal is supported on the frame through the crank supporter.

As another feature of the present invention, the eccentric shaft is integrally formed with an eccentric body, and is provided with an eccentric drum which is inserted into the eccentric shaft and fastened by bolts by the eccentric body and the coupling hole.

As another feature of the present invention, a balance weight is further provided at a lower end of the eccentric shaft to which the eccentric drum is fastened to eliminate the unbalance when an unbalance caused by the eccentric portion becomes a problem.

Figure 2 is a plan view showing the eccentric shaft coupling structure of the press machine according to the invention, Figure 3 is a side view showing the eccentric shaft coupling structure of the press machine according to the invention, Figures 4 and 5 is a press machine according to the invention This is a reference diagram showing the eccentric axis of.

Hereinafter, the components will be described with reference to the drawings.

2 and 3 are a plan view and a side view showing an eccentric shaft coupling structure of the knuckle press machine according to an embodiment of the present invention, the drive unit 40 including the eccentric shaft 41 around the frame 70 is provided One side of the eccentric shaft 41 is installed through the flywheel 10, the clutch unit 20 for connecting or disconnecting the rotation of the drive unit 40 between the drive unit 40 and the flywheel 10, The brake unit 30 is provided to stop the operation of the driving unit 40, and the knuckle mechanism unit 50 is provided at the middle of the driving unit 40 to raise and lower the slide 60.

The drive unit 40 is composed of an eccentric shaft 41, one side of the eccentric shaft 41 penetrates into the flywheel 10 inside, between the eccentric shaft 41 and the flywheel 10 bearing (25, The clutch portion 20 and the brake portion 30 supported by the 35 are provided, and the bearings 25 and 35 are supported by the frame 70 through the wheel supporter 34 and the eccentric shaft 41. In the center is provided with a connecting rod 44 for converting the rotational movement of the eccentric shaft 41 into a linear movement with the connecting rod metal 43 therebetween, and the driving portion to the knuckle mechanism 50 by the connecting rod 44 The power of the 40 is transmitted, the slide 60 is moved up and down, the other side of the eccentric shaft 41 is supported by the front metal 45, the front metal 45 through the crank supporter 46 It is supported by the frame 70.

4 and 5 are reference views showing the eccentric shaft 41, the eccentric shaft 41 is formed integrally with the eccentric body 411, is inserted into the eccentric shaft 41, the eccentric body 411 ) And an eccentric drum 412 fastened to the bolt 414 by the coupling hole 413. The eccentric body 411 and the eccentric drum 412 are formed with a plurality of fastening holes 411a and 412a for fastening the bolt 414.

In addition, the lower end of the eccentric shaft 41 to which the eccentric drum 412 is fastened is further provided with a balance weight 42 to eliminate the unbalance (Unbalance) caused by the eccentric portion is a problem.

The eccentric shaft 41 is manufactured by a casting method using a special cast steel material, and removes the pin portion of the existing crank shape structurally weak and change the shape to the eccentric shaft 41 to increase the strength compared to the crank shaft By applying the eccentric shaft of special cast steel instead of the eccentric shaft of forged products or special steel materials, the weight of the balance weight to eliminate the unbalance caused by the eccentric portion by making the weight of the eccentric portion at the minimum is small. Can be made small.

The clutch portion 20 embedded in the flywheel 10 has a clutch hub portion 22 and a cylinder 24 which are in contact with the eccentric shaft 41 and the wheel cover 21, and supports the eccentric shaft 41. The bearing 25 is provided with a bearing retainer 23, and the brake part 30 embedded in the flywheel 10 is provided with a brake permit part 31 and a brake plate 32 contacting the eccentric shaft 41. The bearing 35 is supported by the flywheel 10 as a bearing 33 and is supported by the frame 70 through the wheel supporter 34.

The knuckle mechanism 50 has a middle pin metal 56 connected to the connecting rod 44 of the driving unit 40 fixed by the middle pin 54, and an upper link connected to the upper link 53 at the upper portion thereof. The pin metal 52 is fixed to the upper link pin 51, and the lower pin metal 58 connected to the lower link 55 to the lower link pin 57 is fixed.

The plunger 61 provided at the lower portion of the knuckle mechanism part 50 is connected to the lower link 55 with the downlink pin metal 58 interposed therebetween, and the plunger guide 62 is provided on the outside thereof. The lower end of the adjusting nut 64 is provided, the adjusting nut 64 is provided with an adjusting screw 63 on the inner side, the lower portion of the adjusting screw 63 according to the height of the mold to position the slide (60). A slide control unit 65 for adjusting up and down is provided, and a slide 60 is provided below the slide control unit 65.

Referring to the operation method of the present invention configured as described above are as follows.

The power generated by the motor rotates the flywheel 10 via the pulley and the belt. The flywheel 10 receives power from the motor and always rotates while accumulating energy while the motor is operating, and then intercepts the power connection. By operating the friction plate built by the clutch unit 20 and the brake unit 30 which stops the rotation of the driving unit 40 by compressed air, the power of the flywheel 10 is interrupted and the driving unit 40 is interrupted. Will be driven.

In this case, when the compressed air is supplied, the friction plate of the clutch unit 20 is connected, and the friction plate of the brake unit 30 is broken, so that the power of the flywheel 10 is transmitted to the eccentric shaft 41 so that the eccentric shaft 41 rotates. On the contrary, when the supply of compressed air is blocked, the friction plate of the clutch unit 20 is cut off, and the friction plate of the brake unit 30 is connected to stop the rotation of the eccentric shaft 41 so that the power of the flywheel 10 is stopped. Is blocked.

When the power is connected from the flywheel 10 to rotate the eccentric shaft 41, the rotational movement of the eccentric shaft 41 is interposed between the connecting rod metal 43 provided in the center of the eccentric shaft 41. Power of the drive unit 40 is transmitted to the knuckle mechanism part 50 by the connecting rod 44 that converts the linear motion to raise and lower the slide 60.

Here, one side of the connecting rod 44 rotates with the eccentric shaft 41 with the connecting rod metal 43 therebetween, and receives the power from the eccentric shaft 41, the other side is the middle pin 54. And a reciprocating motion of swinging the upper link 53 and the lower link 55 from side to side through the middle pin metal 56. However, the upper portion of the upper link 53 is constrained to the upper link pin 51 with the upper link pin metal 52 therebetween to perform a reciprocating motion of the lower swing, and the lower portion of the lower link 55 It is connected to the plunger 61 through the link pin metal 58 with the link pin metal 58 therebetween, the lower part moves up and down, the upper part swings, and reciprocates along the connecting rod 44.

The plunger 61, which receives power from the harlink 55, is restrained and guided by the plunger guide 62, and moves up and down. The up and down motion of the plunger 61 is transmitted to the adjustment screw 63 through the adjustment nut 64 and transferred to the slide 60 through the slide control unit 65 attached to the lower portion of the adjustment screw 63. The 60 will be raised and lowered movement.

Although the present invention has been described by taking an example of an eccentric shaft coupling structure of a knuckle press machine, in the case of a mechanical press device for converting a rotary motion into a linear motion, a crank press, a crankless press, a cam press, a link press, and the like according to the driving mechanism of the slide. And knuckle presses (toggle presses), and other than the cam presses, crank shafts for crank presses, eccentric drums or eccentric shafts for crankless presses, crank shafts for link presses, and eccentric shafts for knuckle presses. The eccentric drum is used to convert the rotation into linear motion.

Therefore, the special cast steel eccentric shaft applied to the present invention can be applied in place of the crank shaft or the eccentric drum or the existing eccentric shaft, in particular combined with the eccentric shaft or the eccentric shaft of the present invention to replace the existing eccentric drum By applying special eccentric drum, cost can be greatly reduced by replacing eccentric drum of large crankless press or link press, which has a very large stroke.

While the invention has been shown and described with respect to particular embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention as set forth in the appended claims. Anyone can grow up easily.

As described above, the present invention has a complicated shape when the conventional crankshaft is applied, so that a large diameter of the material may be used to fabricate it, or by applying a material of a forged product, an expensive material cost and a processing cost may be required. However, by applying the eccentric shaft of special cast steel, the weight of the material can be reduced and the amount of processing can be minimized, thereby greatly reducing the material cost and processing cost.

In addition, by applying an eccentric shaft instead of the crank shaft, it is possible to remove structurally weak pin parts of the crank shape and change the eccentric shaft shape to increase the strength compared to the crank shaft, and by applying the eccentric shaft of special cast steel instead of the eccentric shaft of forged products or special steel materials. Existing cranks, which are long-term delivery products that reduce the weight of the balance weight to eliminate unbalance due to the eccentric part by making the weight of the eccentric part small at the time of wooden production, and influence the delivery time during press production. Compared to the shaft and eccentric shaft, the machining time can be greatly reduced.

Claims (3)

delete The power generated by the motor is transmitted to the flywheel 10 via the pulley and the belt, and the flywheel 10 has a clutch part 20 for controlling the connection of power and a brake part for stopping the rotation of the driving part 40. 30 is built-in, the power of the flywheel 10 is interrupted by the clutch unit 20 and the brake unit 30 to drive the drive unit 40, the drive unit 40 is the eccentric shaft 41 One side of the eccentric shaft 41 penetrates into the flywheel 10, and the clutch unit 20 and the brake are supported by the bearings 25 and 35 between the eccentric shaft 41 and the flywheel 10. The unit 30 is provided, and the bearings 25 and 35 are supported on the frame 70 through the wheel supporter 34, and the center of the eccentric shaft 41 is eccentric with a connecting rod metal 43 interposed therebetween. A connecting rod 44 for converting the rotational movement of the shaft 41 into a linear movement is provided, and is sliced by the connecting rod 44. The rod 60 is lifted up and down, the other side of the eccentric shaft 41 is supported by the front metal 45, the front metal 45 is supported on the frame 70 through the crank supporter 46 In the eccentric shaft coupling structure of the machine, The eccentric shaft 41 has an eccentric body 411 is integrally formed, the eccentric drum 41 is inserted into the eccentric shaft 41 is fastened by the bolt 414 by the eccentric body 411 and the coupling hole 413 ( 412 is provided with an eccentric shaft coupling structure of the press machine. The method of claim 2, The lower end of the eccentric shaft 41 to which the eccentric drum 412 is fastened, the balance weight (42) for eliminating the unbalance (Unbalance) is further provided, if the unbalance (unbalance) caused by the problem is further provided Eccentric shaft coupling structure of press machine.

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