JPH0921452A - Mechanism for converting linear reciprocation of crank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the assembling work, and to lower the cost by securely and easily fitting an oscillating link and a slider freely to be turned without using an additional part of fixing tool such as an axle pin and an E link. SOLUTION: This mechanism is formed of a crank 3 to be driven by a motor or the like, a slider 5 fitted to a fixed guide shaft 4, which is extended straight, freely to be slid, and an oscillating link 7, of which one end is fitted to a crank pin 6 of the crank 3 freely to be turned and of which the other end is fitted to the slider 5. The end of the oscillating link 7 at the slider side is divided to two parallel pieces 7a, 7b, and one piece 7a is provided with a supporting pin 8 projected outside, and the other piece 7b is formed with a receiver hole 9, and the slider 5 is formed with two parallel pieces 5a, 5b, and one piece 5a is provided with a receiver hole 10 for receiving the pin 8 of the link, and the other piece 5b is provided with a pin 11 to be inserted into the receiver hole 9 of the link.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for converting rotary motion of a crank into reciprocating linear motion of a slider.

[0002]

2. Description of the Related Art Generally, a slider and a crank are connected by a swing link as a mechanism for converting the rotary motion of a crank into a reciprocating linear motion of a slider. In this case, the link and the slider are pivotally attached by inserting separately prepared shaft pins into the bearing holes formed in both.

[0003]

However, when such a conventional means is used, a separately prepared shaft pin must be fitted in the hole, and a stopper such as an E-link for fixing the shaft pin is required. The work is complicated and necessary,
This is an obstacle to cost reduction.

Therefore, the present invention makes it possible to pivotally and easily pivotally attach the swinging link and the slider to each other without using any additional parts such as the fixing device such as the shaft pin or the E-link. The main purpose is to simplify the assembly work and reduce the cost.

[0005]

In order to achieve the above object, the present invention takes the following technical measures. That is, in the present invention, the crank 3 driven by the motor 1, the slider 5 slidably mounted on the fixed guide shaft 4 extending in a straight line, and one end of the crank pin 6 of the crank 3 pivotally attached. And the other end of the swing link 7 is pivotally attached to the slider 5.
The slider side end of is branched into two parallel 7a, 7b,
The pivot pin 8 protruding outward to the one piece 7a is
The other piece 7b is provided with a receiving hole 9, and the slider 7 is also formed with two parallel pieces 5a and 5b. One of the pieces 5a has a receiving hole 10 for receiving the pin 8 of the link. The pin 5 which is inserted into the receiving hole 9 of the link is provided on the piece 5b.

[0006]

1 and 2 show one embodiment of a crank-linear reciprocating motion converting mechanism of the present invention, which is driven by a motor 1 and a car box 2. Crank 3 fixed to the output shaft 12 and fixed guide shaft 4 extending linearly in the vertical direction
And a slider 5 slidably attached to the crank pin 6 with one end pivotally attached to the crank pin 6 and the other end pivotally attached to the slider 5. It consists of link 7.

The end of the swing link 7 facing the slider is branched into two parallel 7a and 7b.
A pivot pin 8 projecting outward in a is provided with a receiving hole 9 in the other piece 7b. On the other hand, two parallel pieces 5a and 5b are also formed on the slider 7 in a branched manner.
A receiving hole for rotatably receiving the pin 8 of the link at 5a
The other piece 5b is provided with a pin 11 rotatably inserted into the receiving hole 9 of the link. In addition, the link 7
The dimension Y between the two pieces 7a, 7b of the
0.5mm to 1mm as an assembly clearance by adding the length Z of the pin 8 of the link to the dimension X including the length and the thickness of the piece 5b.
The size with the plus is preferable.

When assembling the slider 5 and the link 7 configured as described above, the two pieces 7a and 7b of the link 7 which are branched are simply fitted between the two pieces 5a and 5b of the slider 5 to form the pin 8 of the link. To the receiving hole 10 of the slider, and the pin 11 of the slider to the receiving hole 9 of the link.
After that, if the lower end of the link 7 is connected to the crank 3, the position of the link is determined and the relative left and right movements are restricted by the respective pieces 5a, 5b, 7a, 7b, and the pins 8, 11 are
The receiving holes 9 and 10 are not separated.

The means for preventing the relative rotation of the slider 5 and the guide shaft 4 may be any method, for example, the rib 4a provided on the guide shaft 4 as shown in the drawings of the above embodiment. And the guide shaft 4 may be formed in a polygonal shape such as a quadrangle as shown in FIG. 3, and the slider 5 may slide along the guide shaft 4.

Although the embodiments which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited to only the structures of the embodiments, but has the structural requirements and achieves the object of the present invention. However, the present invention can be appropriately modified and implemented within a range in which the following effects can be obtained.

[0011]

EFFECTS OF THE INVENTION Since the present invention is constructed as described above, it is possible to swing easily and surely without using any additional parts such as a fixing pin such as a shaft pin serving as a rotary shaft or an E-link. Since the link and the slider can be pivotally attached, this has an excellent effect that the assembling work can be simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a conversion mechanism according to the present invention.

FIG. 2 is a side view of the mechanism.

FIG. 3 is a perspective view showing another embodiment of the guide shaft and the slider portion.

[Explanation of symbols]

 1 Motor 3 Crank 4 Guide shaft 5 Slider 5a, 5b Slider piece 6 Crank pin 7 Link 7a, 7b Link piece 8 pin 9 Receiving hole 10 pin 11 Receiving hole

Claims (1)

[Claims] 1. A crank 3 driven by a motor 1, a slider 5 slidably mounted on a fixed guide shaft 4 extending in a straight line, a crank pin 6 of the crank 3 having one end pivotally attached and the other end And a swing link 7 pivotally attached to the slider 5.
The slider side end of is branched into two parallel 7a, 7b,
The pivot pin 8 protruding outward to the one piece 7a is
The other piece 7b is provided with a receiving hole 9, and the slider 7 is also formed with two parallel pieces 5a and 5b. One of the pieces 5a has a receiving hole 10 for receiving the pin 8 of the link. A crank-linear reciprocating motion converting mechanism in which a pin 11 inserted into the receiving hole 9 of the link is provided on the piece 5b.