JPS5973654A - Reciprocating motion device - Google Patents

Abstract

PURPOSE:To make a reciprocating motion device smaller in comparison with the stroke of a moving body and especially make the width of the device smaller by a structure wherein a second arm, at the tip of which the moving body is mounted, is mounted at the tip of a first arm driven by a motor in order to remarkably shorten the length of a crank arm as compared with the stroke of the moving body. CONSTITUTION:A second arm 9, the length of which equals to that of a first arm 8, is mounted at the tip of the arm 8 and at the same time a chain 14 is wound between a sprocket 11 fixed to a motor and a sprocket 13 mounted onto the shaft of the second arm 9. At this case, the gear ratio of the sprocket 11 to the sprocket 13 is 2:1. When the first arm 8 is rotated by angle theta1 by a motor, the second arm 9 is rotated by angle theta2=2theta1, resulting in reciprocating the tip of the second arm 9 on a straight line with a stroke four times as long as the length of the first arm 8.

Description

Detailed Description of the Invention The present invention converts arm rotational motion via a motor into reciprocating motion, and in particular, in linear reciprocating motion, the reciprocating motion can obtain a stroke that is, for example, four times the length of the crank arm. It is related to the device.

Conventionally, in a linear reciprocating device using a crank motion, a slide block that moves 1 IItlA is directly connected to a crankshaft 1 that moves rotatably through a connecting rod.
Because of the m-joints, increasing the stroke of the slide block not only increases the length of the crank arm, but also increases the length of the connecting loft, resulting in a larger device.

An object of the present invention is to provide a reciprocating device in which an arm is attached to the tip of a crank arm that rotates via a motor in a direction opposite to the rotation of the crank arm by one rotation of the crank arm. The aim is to eliminate the drawbacks of the conventional method.

Next, the configuration of the first embodiment of the present invention is shown in FIGS. 1 to 3 (<
Therefore, I will explain.

For example, a moving body 4 is mounted on a guide rail 3 on a frame 2 of a linear reciprocating device 1 that conveys an intermediate product in the process of processing between press machines, and its vertical and horizontal directions are regulated via a bearing-supported wheel 5 (not shown). The shaft 7 of the motor 6 with a reducer is mounted on the lower part of the frame 2 so as to be able to reciprocate along the guide rail 3, and the tip of the first arm 8 attached to the shaft 7 is attached to the shaft 7 of the motor 6 with a reducer. A second arm 9 of the same length as the first arm 8 is installed, and the motor 6
The sprocket 11, which is mounted on the frame 10 of 2 arm 9 to 1st arm 8
The second arm 9 is rotated one turn in the opposite direction to move the tip end of the second arm 9 along the left-right center line of the guide rail 3 to move it along the left-right center line. 'tQl+ 1 of the shaft 16 at the tip of 9 and the center line of the guide rail 3 and the center line of the moving body 4.
7 to 1, and the long adjustment by the turnbuckle 18 is articulated via the connecting rod 19.

Next, the operation of this embodiment will be explained.

In the nine-linear rhythm reciprocating device 1 constructed as described above, the first arm 58 is connected to the linear axis of the first arm 8 and the second arm 9 through the motor 6 as shown in FIG. 01 rotation, the second arm 9 rotates θ2=2θ1, and as a result, the second
The tip of arm 9 is moved 11i from position A to position B in Figure 3.
Even if the first arm 8 rotates in a negative direction, the rotation angle of the first arm 8 to the second arm 90 is 1:2, so the tip of the second arm 9 is 17-58 on the straight line connecting point A in the figure and the rotation center of the first arm 8.
In addition to reciprocating with a stroke four times that of the long
In accordance with the reciprocating movement of the tip of the arm 9, the movable body 4 also reciprocates on the guide rail 3 with a stroke equal to four times the length of the first arm 8.

Next, FIGS. 4 and 5 show a second embodiment of the invention,
In this case, sprockets 21 and 2 with a rotation ratio of 1:1 are provided between the second arm 9 and the connecting rod 19 in the first embodiment.
2. First arm 8 rotating in opposite directions with chain 23
Besides adding a third arm 24 and a fourth arm 25 of the same length to move the movable body 4 back and forth with a stroke eight times that of the first arm 8, Kaba Fty, operation, and effect are also different. Said first
This is almost the same as the example.

In addition, in each of the above examples, 14! If the machining and assembly product terms of the machine are high, the connecting rod 19 can be omitted, and if the connecting rod 19 is omitted and the amount of spray from the movable body 4 is light, the movable body can be replaced with the guide rail 3 omitted. 4 can be reciprocated, and by giving the guide rail a curve corresponding to the length of the connecting rod 19 or by making the length fields of the 17th-58 and the second arm 9 different. , the movable body 4 can be moved along any curved trajectory or any stroke that is twice or more the length of the first arm 8.

Next, the effects of the present invention will be explained.

The present invention is characterized in that a second arm is attached to the distal end of the first arm that rotates via a motor, and is capable of rotating once in the opposite direction to the rotation of the first arm by one rotation of the first arm, and There is a round trip ¥0% stomach with a moving body attached to the tip of the arm.

As a result, the invention makes the length of the crank arm (first arm) significantly shorter than the stroke of the moving body, for example, 1/4 of the stroke of the moving body, and the reciprocating device is adjusted to the stroke of the moving body. It is relatively small, and in particular, the width of the device can be reduced to reduce the installation space of the device, and it also has the optimum speed control characteristics of soft start and slowdown by interlocking the main and crank. effective.

[Brief explanation of drawings]

FIG. 1 is a front view of the first embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 6 is an explanatory diagram of its operation, and FIG. 4 is a second embodiment of the invention.
FIG. 5, which is a detailed view of the main part of the road body of the embodiment, is an explanatory diagram of its operation. 1... Linear motion device 2... Frame 4... Moving body 6... Motor Otsu 12... Axis
8...ψ, 1 arm 9...$2 arm 10
...Frame 11.13...Sprocket 14...Chain 15...Rotation - 1 ■ line conversion mechanism Applicant: Representative of Nagoya Kiko Co., Ltd. Patent attorney: Hidehiko Okada

Claims (1)

[Claims] One rotation of the first arm causes the tip of the first arm rotating via the motor to rotate once in the opposite direction to the rotation of the first arm.
A reciprocating IO characterized in that a rotatable second arm is attached, and a movable body is attached to the tip of the second arm.
Device.