JPH06174594A - Method and apparatus for detecting connecting rod metal - Google Patents

Abstract

PURPOSE:To reduce labor hour and time by automatically, rapidly and effectively confirming presence/absence of a connecting rod metal without depending upon hands. CONSTITUTION:A connecting rod metal detecting apparatus 1 comprises a support base 3 for supporting a cylinder block 2, rotating means 16 for rotating a crankshaft 18 by an electric motor 14 having a socket 15 to be inserted- engaged within the crankshaft 18 at its end to set several pistons 27, 27, 27, 27 in the block 2 substantially in a horizontal state and to rotate the crankshaft 18 at a predetermined angle at the time of measuring, and measuring means 12 having a trestle 4 arranged above the pistons, a cylinder 5 fixed downward to a top of the trestle 4, a slide plate 8 laid substantially horizontally via a mounting plate 7 at an end of a cylinder rod 6 and measuring terminals 10, 10, 10, 10 capable of being brought into contact with an upper surface of the piston to be stably supported with the plate 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting rod metal used when a piston is mounted on a crankshaft via a connecting rod, and more particularly to a detecting method and device for confirming the presence or absence of the connecting rod metal.

[0002]

2. Description of the Related Art Generally, during engine assembly of an automobile, as shown in FIG. 2, a piston of an engine is mounted by connecting a connecting rod 22 connected to a piston 27 through a piston pin 28 through connecting rod metals 21 and 21 '. Attached to the crankpin 19 of the crankshaft 18. At this time, if the connecting rod metal is not attached, vibration and noise of the engine will be large, and the piston, connecting rod, and crankpin of the crankshaft will be worn,
The engine must be reassembled as it may be damaged. Therefore, conventionally, the crankshaft 1
After attaching the piston 27 to 8, the piston was manually moved to check the presence or absence of the connecting rod metal by checking whether it was loose or not.

[0003]

By the way, the above-described method of manually checking the presence or absence of connecting rod metal by moving the piston is not only time-consuming and time consuming, but also the presence or absence of connecting rod metal due to operator's carelessness. There was a risk of misunderstanding. Therefore, an object of the present invention is to provide a connecting rod metal detecting method and an apparatus thereof, which is configured to automatically and quickly confirm the presence or absence of connecting rod metal without relying on human labor, thereby solving the above problems. It is what

[0004]

The first invention of the present application has been made in view of the above circumstances, in which several pistons mounted on a crankshaft in a cylinder block through connecting rods are substantially horizontal. The crankshaft is rotated so as to be in a state, the measuring terminal is brought into contact with the upper surface of the piston which is in a substantially horizontal state, and the crankshaft is rotated by a predetermined angle. The presence or absence of the connecting rod metal is confirmed by measuring the amount of movement of the connecting rod with the measuring terminal.

A second aspect of the present invention is a support base for supporting a cylinder block having several pistons attached to a crankshaft via connecting rods, and a socket for inserting / fitting the crankshaft. An electric motor for rotating the crankshaft to bring several pistons in the cylinder block into a substantially horizontal state, and at the time of measurement, rotating means for rotating the crankshaft by a predetermined angle by the electric motor; Mount a mount on the mount, fix the cylinder downward on the mount, and install a slide plate on the tip of the cylinder rod of the cylinder in a substantially horizontal direction via a mounting plate. A measuring terminal which is slidable in a substantially horizontal direction and which is capable of contacting the upper surface of the measuring terminal. And it is characterized in and.

[0006]

In the first invention having the above-mentioned structure, the crankshaft is rotated so that several pistons are substantially horizontal, and the measuring terminals are brought into contact with the upper surfaces of the pistons which are substantially horizontal. Set the measuring terminal scale to zero.
Then, the crankshaft is rotated by a predetermined angle, and the amount of movement of the piston due to the rotation of the crankshaft by the predetermined angle is measured at the measuring terminal to confirm the presence or absence of the connecting rod metal.

Further, in the second aspect of the present invention, the electric motor of the rotating means is rotated, the crankshaft is rotated through the socket, and several pistons are brought into a substantially horizontal state. In this state, each measuring terminal of the measuring means is slid and positioned so as to be positioned above the piston in the cylinder block, the cylinder is operated and the cylinder rod is moved downward, and the mounting plate and slide plate are moved. Move it downward and bring the tip of the measuring terminal into contact with the top of the piston, and set the scale of the measuring terminal to zero. Then, the electric motor is rotated, the crankshaft is rotated by a predetermined angle, and the amount of movement of each piston due to the rotation of the crankshaft by a predetermined angle is measured at each measuring terminal to confirm the presence or absence of the connecting rod metal.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a connecting rod metal detector according to the present invention. As shown in FIG. 1, the connecting rod metal detecting device 1 has a work support base 3 that supports a cylinder block 2 of a four-cylinder engine that is being assembled. A gantry 4 is disposed above the cylinder block 2, and a cylinder 5 is fixedly installed on the gantry 4 with the cylinder rod 6 directed downward. A mounting plate 7 is fixed to the tip of the cylinder rod 6, and a slide plate 8 extends in the left-right direction on the mounting plate 7 so as to be located above the cylinder block 2. Terminal holders 9, 9, 9, 9 are supported on the slide plate 8 so as to be slidable in the left-right direction, and the measurement terminals 10, 10, 1 are attached to the terminal holders 9, 9, 9, 9.
0 and 10 are slidably inserted and held in the vertical direction, and a display unit 11 is connected to the measuring terminals 10, 10, 10 and 10.

Further, an OK indicator lamp 1 of the first cylinder indicating that there is a connecting rod metal on the upper portion of the display portion 11.
1a, second cylinder OK indicator light 11b, third cylinder OK indicator light 11c, and fourth cylinder OK indicator light 1
1d is arranged, and the NG indicator lamp 11 of the first cylinder indicating that there is no connecting rod metal under the display portion 11
e, NG indicator lamp 11f of the second cylinder, NG indicator lamp 11g of the third cylinder, and NG indicator lamp 11 of the fourth cylinder
h is arranged. Then, the gantry 4, the cylinder 5, the cylinder rod 6, the mounting plate 7, the slide plate 8, the terminal holders 9, 9, 9, 9 and the measuring terminals 10, 1
The measuring unit 12 is composed of 0, 10, and 10. Further, a servo motor 14 is disposed on the side of the work support base 3 so as to be movable up and down, left and right, and back and forth. At the tip of the rotary shaft of the servomotor 14, a socket 15 that can be inserted / fitted into a crankshaft described later is fixed. The servomotor 14 and the socket 15 constitute a rotary unit 16.

FIG. 2 is an exploded perspective view of the piston. A semi-cylindrical upper connecting rod metal 21 and a lower connecting rod metal 21 'are provided on the outer periphery of the crank pin 19 of the crank shaft 18 in the cylinder block to connect the connecting rod 2 to each other.
2 big end 22a and cap 23 are attached, and connecting rod 22 and cap 23 are bolt 2
5, 25 and nuts 26, 26 are integrally connected. The crank pin 19 and the connecting rod metal 21,
21 'is rotatable. And connecting rod 2
A piston pin 28 of a piston 27 is inserted into the second small end 22b and is rotatably supported.

Since this embodiment is constructed as described above,
During the engine assembling work, the operator attaches the upper connecting rod metal 21 and the lower connecting rod metal 21 'to the outer periphery of the crank pin 19 of the crankshaft 18, and abuts and fits the big end 22a of the connecting rod 22 on the outer periphery of the upper connecting rod metal 21. Let the lower connecting rod metal 21 '
A cap 23 is brought into contact with and fitted to the outer periphery of the bolt 25,
The connecting rod 22 and the cap 23 are integrated by tightening 25 and the nuts 26, 26. And
A piston 27 is rotatably attached to the small end 22b of the connecting rod 22 via a piston pin 28.

As shown in FIG. 1, when the first piston of the four-cylinder engine is in TOP (top dead center), the second and third pistons are in bottom dead center, and the fourth piston is in TOP, the operator Attaches the socket 15 at the tip of the rotary shaft of the servomotor 14 to the crankshaft 1 of the cylinder block 2.
8 and the servomotor 14 is rotated to rotate the crankshaft 18 and the crankpin 19 through the socket 15 counterclockwise by 90 ° from the TOP state shown in FIG. The positions of the upper surfaces of 27, 27, 27 are aligned in a substantially horizontal state. Then, the terminal holders 9, 9, 9, 9 are slid to the left and right so that the measuring terminals 10, 10, 10, 10 of the measuring unit 12 are located above the corresponding pistons 27, 27, 27, 27, respectively. Fixed,
By operating the cylinder rod 6 of the cylinder 5 downward, the mounting plate 7, the slide plate 8, the terminal holder 9,
9, 9, 9 and the measuring terminals 10, 10, 10, 10 are moved downward so that the tips of the measuring terminals 10, 10, 10, 10 are brought into contact with the upper ends of the pistons 27, 27, 27, 27. Touch and set the scale to zero. Then, from this state, as shown in FIG. 3B, the crankshaft 18 and the crankpin 19 are rotated from the position of 90 ° in the counterclockwise direction by a certain angle in the counterclockwise direction and the clockwise direction, and the original 90 ° is rotated. Return to position.

Further, when the lower connecting rod metal 21 'is not attached, the state in which the scale is set to zero is as shown in FIG. 4 (a), and the crankshaft 18 and the crankpin 19 are counterclockwise. 4B, when the crankshaft 18 and the crankpin 19 are further rotated clockwise by a constant angle to return to the original 90 ° position, the state shown in FIG. The state shown in (c) is reached, and the piston shows a position lower than the zero position of the scale.
It is found that, out of the 1 NG indicator lights 11e, 11f, 11g, and 11h, the NG indicator light of the cylinder is turned on, and any one of the connecting rod metals 21 and 21 'is not attached.

On the other hand, when the upper connecting rod metal 21 is not attached, the state in which the scale is set to zero is as shown in FIG. 5 (a), and the crankshaft 18 and the crankpin 19 are rotated counterclockwise. 5B, when the crankshaft 18 and the crankpin 19 are further rotated clockwise by a constant angle to return to the original 90 ° position, the state shown in FIG. The state shown in c) is reached, and the piston shows a position lower than the zero position of the scale.
It is found that, out of the 1 NG indicator lights 11e, 11f, 11g, and 11h, the NG indicator light of the cylinder is turned on, and any one of the connecting rod metals 21 and 21 'is not attached.

When the connecting rod metals 21 and 21 'are mounted together, the servomotor 14 is rotated to rotate the crankshaft 18 from the 90 ° position in the counterclockwise and clockwise directions by a predetermined angle. , Original 90 °
Return to the position of all cylinders 27, 27, 2
7, 27 return to the zero position of the scale, and the display unit 1
OK indicator light 11a of the first, second, third, fourth cylinder
11b, 11c and 11d are turned on, and it is found that the connecting rod metals 21 and 21 'are attached.

Thus, it is not necessary for the operator to manually move the piston to determine whether or not there is looseness and whether or not the connecting rod metals 21 and 21 'are attached depending on whether or not there is a rattling noise. The presence / absence of the connecting rod metals 21, 21 'can be automatically and swiftly confirmed. Even if the type of the four-cylinder engine is different, it is only necessary to slide the terminal holders 9, 9, 9, 9 of the measuring unit 12 to the left and right to position it, and it is possible to easily cope with any type of the four-cylinder engine. be able to.

[0017]

As described above, according to the present invention,
The operator does not have to manually check the presence or absence of the connecting rod metal, and can automatically and quickly check the presence or absence of the connecting rod metal, which saves labor and time, and mistakes in the presence or absence of the connecting rod metal. Can be prevented. Further, even if the type of the four-cylinder engine is different, it is only necessary to slide and position the four measuring terminals of the measuring section to the left and right, and it is possible to easily cope with any type of the four-cylinder engine.

[Brief description of drawings]

FIG. 1 is a front view showing a connecting rod metal detector according to the present invention.

FIG. 2 is an exploded perspective view of a piston and a connecting rod portion.

FIG. 3 is an operation explanatory view for explaining the operation of the piston of the connecting rod metal detecting method according to the present invention, in which (a) shows a state in which the crankshaft is rotated about 90 ° counterclockwise from the TOP state of the piston to a fixed position. FIG.
(B) is a diagram showing a state in which the crankshaft is rotated counterclockwise and clockwise by a certain angle after the scale is set to zero.

FIG. 4 shows the positional relationship between the piston and the connecting rod when the cap side connecting rod metal is not attached, (a) shows the positional relationship between the piston and connecting rod when the scale is set to zero, and (b) shows the crankshaft and The positional relationship between the piston and connecting rod when the crankpin is rotated counterclockwise by a certain angle is shown in (c), and the crankshaft and crankpin are further rotated clockwise by a certain angle to return to the original 90 ° position. It is a figure which shows the positional relationship of a piston and a connecting rod at the time of doing.

FIG. 5 shows the positional relationship between the piston and the connecting rod when the connecting rod side connecting rod metal is not attached, (a) shows the positional relationship between the piston and connecting rod when the scale is set to zero, and (b) shows the crankshaft and The positional relationship between the piston and connecting rod when the crankpin is rotated counterclockwise by a certain angle is shown in (c), and the crankshaft and crankpin are further rotated clockwise by a certain angle to return to the original 90 ° position. It is a figure which shows the positional relationship of a piston and a connecting rod at the time of doing.

[Explanation of symbols]

 1 Connecting Rod Metal Detector 2 Cylinder Block 3 Work Support 4 Frame 5 Cylinder 6 Cylinder Rod 7 Mounting Plate 8 Slide Plate 9, 9, 9, 9 Terminal Holder 10, 10, 10, 10 Measuring Terminal 11 Display 11a, 11b, 11c, 11d OK indicator light 11e, 11f, 11g, 11h NG indicator light 12 Measuring part 14 Servo motor 15 Socket 16 Rotating part 18 Crankshaft 19 Crankpin 21 Upper connecting rod metal 21 'Lower connecting rod metal 22 Connecting rod 22a Connecting rod big end 22b Connecting rod small end 23 Cap 25 Bolt 26 Nut 27 Piston 28 Piston pin

Claims (2)

[Claims] 1. A crankshaft is rotated so that several pistons attached to a crankshaft in a cylinder block via connecting rods are in a substantially horizontal state,
By abutting a measurement terminal on the top surface of the piston in a substantially horizontal state, rotating the crankshaft by a predetermined angle, and measuring the movement amount of the piston accompanying the rotation of the crankshaft by a predetermined angle at the measurement terminal, A method for detecting connecting rod metal, characterized by confirming the presence or absence of connecting rod metal. 2. A crankshaft is supported by a support base for supporting a cylinder block having several pistons attached to the crankshaft via connecting rods, and an electric motor having a socket at the tip for inserting / fitting the crankshaft. By rotating the several pistons in the cylinder block to a substantially horizontal state, and rotating the crankshaft by a predetermined angle by the electric motor at the time of measurement, a rotating means is installed above the pistons, and A cylinder is fixed to the upper part of the cradle downward, and a slide plate is horizontally installed horizontally at the tip of the cylinder rod of the cylinder via a mounting plate. And a measuring means configured to support the so as to be slidable in a substantially horizontal direction. Dometal detector.