KR200198629Y1 - Link device for detecting information of engine - Google Patents

Abstract

It is an object of the present invention to provide a link device for detecting information of an engine, which ensures durability of a wire by reducing a change in a bending angle of a link mechanism supporting a wire disposed to transmit information such as an engine temperature to the outside.

The present invention to achieve the above object

It is connected rotatably to the two links 5 and 6 for disposing and supporting the wire 3 drawn out to transmit the temperature information of the engine to the outside, and the connecting rod 2 and the fixed support 4. In the link device for detecting information of an engine including three hinge portions (8) (9) and (10),

In addition to the two links 5 and 6, the third link 5 is pivotally hinged so that the three links 5, 6 and 7 and the four hinges 8 and 9 are connected. Characterized in that the configuration provided by (10) (11).

Description

Link device for detecting information of engine

The present invention relates to a link device for detecting information of an engine for detecting information such as the temperature of a piston for testing an engine.

Since the piston moves at high speed and is exposed to high temperature heat in the combustion chamber, it causes thermal expansion.The degree of thermal expansion of the cylinder, piston and piston ring is different according to the temperature characteristics of each part and affects the performance of the engine. Temperature information detection of each part, bearing oil film thickness measurement test, etc. are performed.

The wire 3 is embedded in the piston 1 in order to detect temperature information and the like of each part of the bar piston 1, which shows a test engine used in a conventional temperature measurement and the like in FIG. 4. This information transmission wire 3 is drawn out to the outside along the connecting rod 2 and the two links 5 and 6.

The wire 3 is arranged to transmit the detected information through the sensors planted in the piston 1 or the connecting rod 2, but the piston 1 and the connecting rod 2 and the links 5 and 6 Since the reciprocating rocking motion is left as it is, the wire is broken and the experiment is impossible.

For this reason, in order to pull out the wire 3 stably, as shown in FIG. 5, it arrange | positions so that it may pass through the hinge shaft 8 which connects each link 5,6.

However, in the conventional case, since the wire 3 has a hinge shaft 8, it is possible to secure the service life to some extent, but according to the rotation of the crank shaft, the bending angles α, β, and γ between the links 5 and 6 are large. Since the rate of change of the angular moment of change is large, the wire 3 is subject to torsion in the hinge axis 8.

In addition, the greater the degree of change in the angle, the greater the amount of torsion, which increases the fatigue of the wire 3, and due to the sudden increase in fatigue, there is a problem that the test is frequently stopped due to the high speed operating condition of the engine.

Therefore, the present invention has been proposed in view of the above problems, and its purpose is to reduce the bending angle change of the link mechanism supporting the wire to be transmitted to the outside such as the temperature of the engine, thereby ensuring durability of the wire. The present invention provides a link device for detecting information of an engine.

The present invention to achieve the above object

In the link device for information detection of an engine comprising two links for arranging and supporting the wire drawn out to transmit the temperature information of the engine to the outside, and three hinge parts rotatably connected to the connecting rod and the fixed support. ,

In addition to the two links, the third connection link is pivotally connected to the third link and four hinge parts.

1 is a view showing a link device for detecting information of an engine according to the present invention

2 is a view showing a wire wiring state of the hinge portion of the present invention

3 is a view showing a state in which a torsion spring is mounted on the hinge of the present invention;

4 and 5 is a prior art

※ Explanation of codes for main parts of drawing

1: piston

2: connecting rod

3: wire

4: fixed support

5,6,7: link

8,9,10,11: hinge part

12: torsion spring

Hereinafter, with reference to the accompanying drawings the configuration and operation of the present invention.

In FIG. 1, 1 is a piston, and 2 is a connecting rod.

Reference numeral 3 denotes a wire 3 for externally transmitting information detected from a sensor (not shown) embedded in the piston 1 or the like to measure the temperature of the piston 1 or to measure the oil film thickness of the crankshaft support bearing. )to be.

The connecting rod 2 is composed of three rotatable links, that is, the first link 5, the second link 6, and the third link 7, between the fixed support 4 and all four hinges. Branches (8) (9) (10)

(11), the wire (3) is passed through the central hinge axis of each of the hinge portion (8-11) in the middle of being disposed along each of the links (5), (6) and (7) as in the prior art .

The hinge portions 9 and 10 between the links 5, 6, and 7 are provided with a torsion spring 12 which always emits in a direction in which both links open.

In the present invention, even if the connecting rod 2 moves in the same trajectory, the number of links increases more than in the prior art, so that the angle of change of bending during the movement appearing in each of the hinge parts 9, 10, 11 becomes smaller than in the prior art. Accordingly, the wires 3 passing through each of the hinge portions 9, 10 and 11 are less torsioned and the fatigue acting on the wires 3 becomes much smaller.

On the other hand, when the three-link is employed as in the present invention, the first hinge portion 8 moves in a circular trajectory by the swinging motion of the connecting rod 2, and the fourth hinge portion 11 is a fixed support portion ( 4), since it has a fixed position, it becomes a statically indeterminate that is difficult to predict the motion of the second link 6 located in the middle of the three links. The movements of 6) (7) are performed separately, the prediction of the change angle is also impossible, and the movement of each link 5, 6, 7 can become unstable.

However, at this time, the torsion spring 12 acting to open the two links can be stabilized and the change angle of the link can be reduced.

According to the present invention as described above, the rate of change in the bending angle of each hinge portion is reduced by adding one link to the link apparatus having a three-link and four hinge portion instead of the conventional two-link and three-hinge link apparatus. This reduces the fatigue phenomenon caused by the twisting of the wire through the hinge, and the instability of the link caused by the increased number of links is reduced by the torsion spring. By increasing the effect of securing the stability of the test.

Claims (2)

It is connected rotatably to the two links 5 and 6 for disposing and supporting the wire 3 drawn out to transmit the temperature information of the engine to the outside, and the connecting rod 2 and the fixed support 4. In the link device for detecting information of an engine including three hinge portions (8) (9) and (10), In addition to the two links 5 and 6, the third link 5 is pivotally hinged so that the three links 5, 6 and 7 and the four hinges 8 and 9 are connected. 10) (11) The link device for detecting information of the engine, characterized in that the configuration provided. The method of claim 1, Torsion springs 12 which act on the hinges 8, 9, 10 and 11 which rotatably connect between the links 5, 6 and 7 so as to exert a force in the direction in which the two links are opened to each other. An information detection link device for an engine, characterized by the configuration provided.