JP3062574U - 2-point double toggle joint mechanism - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To improve the accuracy of a punch press by keeping constant the parallelism and verticality when a slide moves, and avoiding tilting. SOLUTION: A flywheel and a crankshaft are rotated by a motor, and at the same time, a connecting rod is connected to the crankshaft to move two symmetrical double toggle joint mechanisms on the left and right. Double toggle joint mechanism is L
The pin and the connecting rod are connected at the end of the mold engagement, and the L-shaped engagement is provided with two holes. An eccentric shaft is inserted into one hole, and a toggle plate is connected to the other hole. A guide post is connected to the other end of the toggle plate. In addition, a sliding bar is provided below the guide pole, and the connecting rod also moves when the crankshaft rotates. Due to the up and down linear movement of the pin, the movement angle of the double toggle joint and the toggle plate of the L-shaped engagement on both the left and right sides coincide, and the slide moves up and down, and the parallel and vertical angles are always kept constant.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to the technology of punch presses, and more particularly to the technology of a toggle joint type punch press that increases the accuracy by moving the slide of the punch press up and down while keeping it horizontal.

[0002]

[Prior art]

 A conventional punch press uses the rotation of a crankshaft to link a connecting rod, and presses a die by linearly moving a slide metal up and down. This type of punch press has a relatively short press time, so the working time is very short. In the toggle joint type, the sliding metal moves at a low speed, so the press work takes a relatively long time. FIG. 1 shows a two-point single toggle joint mechanism, in which two connecting rods 2 corresponding to two eccentric crank shafts 1 are provided, and a single toggle joint is provided at the other end of the connecting rod 2. -Provide two connecting rods 2 that connect the mechanism 3 and drive directly to the crankshaft 1. However, as shown in FIG. 1, the connecting rod 2 cannot perform linear motion. Since the movement angles of the two left and right single toggle joint mechanisms 3 do not match, the slide 4 under the single toggle joint mechanism 3 generates a relatively large inclination angle as shown in the figure in the process of moving. In addition, if the slide 4 is tilted, the product manufactured by pressing is damaged, resulting in an increase in cost. As shown in FIG. 2, another conventional two-point single toggle joint mechanism connects a connecting rod 2 to a double eccentric crankshaft 1 at a symmetrical position, and a connecting rod 2 at the other end. Connect each single toggle joint mechanism 3. At the place where the single toggle joint mechanism 3 and the connecting rod 2 are connected, a linear motion mechanism 5 that makes a nearly linear motion is provided. The slide 4 tilts slightly during the movement process as shown in FIG. For this reason, the conventional technology cannot maintain a constant parallel angle and vertical angle, and high-precision machining has been impossible.

[0003]

[Problem to be solved by the invention] The main purpose of the invention is to increase the accuracy of the punch press to provide a single eccentricity on the crankshaft and to simultaneously connect with the connecting rod. A vertical linear motion is achieved through the pin where the connecting rod and the L-shaped engagement are connected. Also, by matching the movement angles of the two sets of double toggle joint mechanisms, the parallelism and verticality are kept constant when the slide moves, and the accuracy of the punch press is increased. Another object of the present invention is to extend the service life of the mold by using a two-point double toggle joint mechanism to prevent the slide from tilting when moving up and down.

[0004]

[Means for solving the invention]

 The present invention is a two-point double toggle joint mechanism. The transmission method is to rotate the flywheel and the crankshaft with a motor, and connect the connecting rod to the crankshaft at the same time. Move joint mechanism. The double toggle joint mechanism connects the pin and the connecting rod at the end of the L-shaped engagement, and the L-shaped engagement has two holes. An eccentric shaft is inserted into one hole, and a toggle plate is connected to the other hole. A guide pole is connected to the other end of the toggle plate. In addition, slides are provided under the guide poles, and the connecting rods also move when the crankshaft rotates. Due to the vertical linear movement of the pin, the movement angle of the double toggle joint and the toggle plate of the L-shaped engagement on both the left and right sides coincide, and the sliding metal moves up and down, keeping the parallel and vertical angles constant at all times. Increase.

[0005]

[Embodiment of the invention]

 As shown in FIGS. 3 to 6, in the present invention, the motor 11 rotates the crankshaft 13 and the flywheel 14 with the belt 12, and the connecting rod 15 is provided on the crankshaft 13. -Includes a transmission set 10 provided with a toggle joint mechanism 20. Two double toggle joint mechanisms 20 are installed symmetrically on the connecting rod 15, and one end of the L-shaped engagement 21 is connected to the connecting rod 15 of the transmission set 10 by a pin 22. 5 (pivot contact E in FIG. 5), a hole 23 is formed in the L-shaped engagement 21 (toggle joint A in FIG. 5), and an eccentric shaft 24 is inserted into the hole 23 and installed (fixed point C in FIG. 5). The other end of the L-shaped engagement 21 is connected to the two toggle plates 30 with the first pin 31 (toggle joint B in FIG. 5), and the other end of the toggle plate 30 is guided by the second pin 32. 33 (the pivot contact D in FIG. 5). Further, the slide metal 40 is installed below the two guide posts 33, and the upper mold 41 is installed below the slide metal 40.

FIG. 3 shows the combination of the above-described parts. When the crankshaft 13 of the present invention rotates 90 degrees (see FIG. 5), the connecting rod 15 is moved to move the L-shaped engagement 21. It is vertically pushed up (one end of the connecting rod 15 forms a vertical up-down linear movement). The toggle joints A and B, the fixed point C, and the toggle plate 30 of the L-shaped meshing member 21 make an angular movement (in the present invention, the connecting rod 15 is interlocked with the crankshaft 13 to form two double toggle joint mechanisms 20). The sliding metal 40 is moved up and down by the guide pole 33 while maintaining a horizontal state without inclination, and the crankshaft 13 is continuously rotated to 180 degrees (see FIG. 6). ), The upper mold 41 is pressed in accordance with the slide metal 40. Since the movement angle of the double toggle joint mechanism 20 is the same, the movement direction of the connecting rod 15 and the movement direction of the slide 40 are opposite. Therefore, the effect of dynamic balance is obtained and the vibration of the machine is reduced to the minimum. When the slide 40 is moving, it maintains vertical sliding with precise parallelism and does not tilt the mold as in the conventional single toggle joint mechanism. Therefore, high-precision parts can be manufactured by a punch press. When the crankshaft 13 rotates continuously and reaches a position of 270 degrees (see FIG. 6) and when the crankshaft 13 rotates to the original angle (see FIG. 5), the slide 40 is moved by the double toggle joint mechanism 20. Return to the original position and finish one stroke of the press. By reversing the direction of movement of the two toggle joints A and B and the connecting rod 15 of the double toggle joint mechanism 20 of the present invention and the direction of movement of the slide 40, the balance when the slide 40 moves is achieved. The tool and the machine are not tilted, extending the service life of the mold and machine.

[0007]

[Effect of the invention]

 The present invention has the following effects. First, the conventional single toggle joint mechanism had two eccentric crankshafts and two connecting rods, so the error was doubled, but the present invention has two double toggle joint mechanisms and a single eccentric crankshaft. And a single connecting rod, there is only a single error. Second, the conventional technique does not perform linear motion, but inclines greatly when the slider moves, or slightly inclines when the slider moves even when it is close to linear motion. However, the two symmetric double toggle joint mechanisms of the present invention guide vertically and make the connecting rod move linearly. Third, the present invention reverses the direction of movement of the connecting rod and the slide, so that the slide has a dynamic balance effect. Fourth, the advantages described above increase the precision of the punch press by giving the slide metal a dynamic balance effect. Further, the service life can be extended and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing the structure and operation of a conventional single toggle joint mechanism.

FIG. 2 is a structure and operation diagram of another conventional single toggle joint mechanism.

FIG. 3 is a perspective view of the present invention.

FIG. 4 is an exploded perspective view of the present invention.

FIG. 5 is a diagram (1) showing the structure and operation of the present invention.

FIG. 6 is a structure and operation diagram (2) of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crankshaft 2 Connecting rod 3 Single toggle joint mechanism 4 Slider 5 Linear motion mechanism 10 Transmission set 11 Motor 12 Belt 13 Crankshaft 14 Flywheel 15 Connecting rod 20 Double toggle joint mechanism 21 L-type engagement 22 Pin 23 Hall 24 Eccentric shaft 30 Toggle plate 31 First pin 32 Second pin 33 Lead 40 Slide gold 41 Upper mold A Toggle joint B Toggle joint C Fixed point D Pivot contact E Pivot contact

Claims (1)

[Utility model registration claims] 1. In a two-point double toggle joint mechanism, a motor 11 mainly rotates a crankshaft 13 and a flywheel 14 with a belt 12, and a connecting rod 15 is provided on the crankshaft 13. The connecting rod 15 includes a transmission set 10 provided with two double toggle joint mechanisms 20, and two of the double toggle joint mechanisms 20 are symmetrically installed on the connecting rod, The toggle joint mechanism is connected by inserting one end of the L-shaped engagement 21 into the connecting rod 15 of the transmission set 10 with the pin 22 and connecting the L-shaped engagement 21 with the L-shaped engagement 21.
A hole 23 is formed in the hole 23 to form a toggle joint A, and an eccentric shaft 24 is inserted into the hole 23 for installation. Is formed so that the other end of the toggle plate 30 is connected to the guide post 33 by the second pin 32. When the crankshaft 13 rotates, one end of the L-shaped engagement 21 forms a vertical vertical linear motion by interlocking the connecting rod 15, and a toggle joint of the L-shaped engagement 21. A, B and toggle plate 30 exhibit angular motion,
The movement angles of the two double toggle joint mechanisms 20 are matched, and the sliding metal 40 is moved up and down by the guide poles 33 while maintaining a horizontal state without inclination, to produce high precision parts by punch press. And the service life of the mold and the machine can be extended.
Point type double toggle joint mechanism.