JPH0144459B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to valve guides on the intake side and exhaust side, which are assembled so that the axes of the cylinder head of an engine are oblique to each other. The present invention relates to a valve insertion device for inserting a valve.

(Prior Art) Conventionally, the work of inserting an intake valve and an exhaust valve is generally performed manually by an operator.

(Problem to be solved by the invention) The work of inserting a valve is a fairly detailed work;
The large number of valves requires heavy labor for workers, so automation is desired to improve productivity.

In this case, it is desirable to be able to insert the valve into the valve guide from the vertical direction to facilitate alignment between the valve and the valve guide, but the axes of the valve guides on the intake side and the exhaust side are mutually oblique. Therefore, the problem in automation is how to make it possible to vertically insert intake and exhaust valves into these valve guides in a single stage.

SUMMARY OF THE INVENTION An object of the present invention is to solve these problems, automate the work of inserting intake and exhaust valves, and improve productivity.

(Means for Solving the Problems) The present invention is characterized in that the intake valves are installed in the intake side and exhaust side valve guides, which are assembled to the cylinder head of the engine so that their axes intersect with each other obliquely. A device for inserting a valve and an exhaust valve, which has a valve supply device for the intake valve and an exhaust valve that holds each valve with its head upward so that it can be freely inserted and removed, and a necessary lifting device to raise and lower the valve. A gripping means for removably gripping the valve and a valve pushing means are provided on a support plate which is moved between the upper part of the valve supply device and the upper part of the cylinder head which is set with the combustion chamber side facing up. and a cylinder head tilting device for tilting the cylinder head so that the axes of the intake-side valve guide and the exhaust-side valve guide are alternately perpendicular. Insert the intake valve using the valve insertion unit with the cylinder head tilted so that the axis of the valve guide is vertical, and insert the intake valve with the cylinder head tilted so that the axis of the exhaust side valve guide is vertical. A valve insertion device for inserting a valve into a valve guide in a cylinder head of an engine into which a valve is inserted.

(Example) Hereinafter, the present invention will be described in more detail with reference to illustrated examples.

In the figure, reference numeral 1 indicates a support column located on the base 2. 3
is a valve insertion unit support seat which is attached to the column so as to be horizontally rotatable and which is rotated at a predetermined angle using a hydraulic cylinder 4. Reference numeral 5 denotes a support arm extending horizontally from the tip of the valve insertion unit support seat 3, and the base 5a is connected to the guide rod 3a of the valve insertion unit support seat 3.
It is slidably attached to and movable in the vertical direction, and is moved vertically at a predetermined timing using a hydraulic cylinder 6. Reference numeral 7 designates a valve insertion unit, in which a valve gripping means 7a and a valve pushing means 7b are attached to a pair of upper and lower parallel support plates 9 and 10 which are moved horizontally along the support arm 5 using a hydraulic cylinder 8. Here, the valve pushing means 7b includes a valve pushing rod 1 which passes through the lower support plate 10 vertically movably at right angles and has a weight 11 at its upper end.
2, and a valve press rod support member 1 that is raised and lowered with a hydraulic cylinder 13 fixed to the upper support plate 9 and that supports the lower part of the weight 11 of the valve press rod 12 with a horizontal protrusion 14a.
4 and a valve press rod pressing member 16 which is lifted and lowered with a hydraulic cylinder 15 fixed to the upper support plate 9 and which presses the upper end of the valve press rod 12 with a horizontal protrusion 16a. The valve gripping means 7a has a hydraulic cylinder 17 below the lower support plate 10 and is moved in the same direction as the movement direction of the support plate 10, and has an end face with a diameter slightly larger than that of the valve shaft. a guide member 18 provided with a guide groove 18a;
A lever 21 is rotatably supported on a support shaft 19 and rotated by the operation of a hydraulic cylinder 20.
The valve gripping member 23 is comprised of a lid 22 fixed to the end of the guide member 18 for opening and closing the guide groove 18a of the guide member 18. Incidentally, reference numeral 18b is a valve head support member that supports the head of the valve provided on the upper surface of the guide member 18 in a sandwiching manner.

Further, the valve pressing rods 12 are provided in a required number,
For example, if the number of valves is eight, which corresponds to the number of valves lined up as shown in FIG. 13, a plurality of valves can be inserted at once.

Reference numeral 24 denotes a cylindrical valve suction device connected to an intake device (not shown), which is raised and lowered at a predetermined timing using a hydraulic cylinder 25, and when raised, its upper end touches the cylinder head W set at a predetermined position. It is brought into contact with the lower end of the valve guide G. Further, the valve suction device 24 is arranged on the base of a cylinder head tilting device, which will be described later.

26 is a cylinder head tilting device, which is used to alternately insert valves into the intake side valve guide G and the exhaust side valve guide G' of the cylinder head W, which is set with the combustion chamber side facing up. It is placed in front of the base 2.

The cylinder head tilting device 26 is mounted on a base 27.
, a rotating shaft 29 horizontally penetrating a rising portion 28 protruding from the base 27, a V-shaped support member 30 and a horizontal lever 31 fixed to both ends of the rotating shaft 29, respectively. , is provided on the base 27, and has a solenoid 3 on the lower surface of one end side of the horizontal lever 31.
2, a stopper pin 33 abuts at a predetermined timing, a hydraulic cylinder 34 having the tip of its piston rod connected to the end of the horizontal lever 31 opposite to the stopper pin 33;
The cylinder head holding plate 36 is fixed to the upper part of the V-shaped support member 30 and tilted by the tilting of the V-shaped support member 30, and has a reference pin 35 projecting from the center of the upper surface.

The cylinder head W set on the cylinder head holding plate 36 is placed and fixed in a regular position using the reference pin 35 and other pins (not shown). Further, 37 is an inclination angle regulating pin.
In addition, 38 is a valve supply device for applying oil to the shaft of the valve and holding the valve head upward so that it can be inserted and removed freely, and it holds valves V in the center according to the number of valves. Valve holding cylinder 3
An oil storage tank 40 provided with 9 is placed on a support base 41 with 8
They are arranged side by side. Further, as shown in FIG. 1, the valve supply device 38 has two sets installed on both sides of the base 2, one for the intake side valves and the other for the exhaust side valves.

Further, 42 is a valve insertion detection device for detecting whether or not the valve is correctly inserted into the mouth of the valve guide, and is fixed to a support plate 9a vertically provided from the support plate 9 on the side of the valve pressing rod 12. It consists of a light projecting tube 43 and a light receiving tube 44.
Furthermore, the light projecting tube 43 and the light receiving tube 44 detect whether or not the position of the valve pressing rod is at the normal position when the bulb insertion unit reaches the lowering end.
The light emitted from the light projecting tube 43 is received by the light receiving tube 44 when the light projecting tube 43 is in the correct position.

Further, 45 is a stem seal fitting detection device for detecting whether or not the stem seal is fitted to the valve guide, and is composed of a light projecting tube 46 and a light receiving tube 47 fixed to the support plate 9a. be.
Furthermore, the light projecting tube 46 and the light receiving tube 47 detect whether or not the position of the valve pressing rod 12 is in the normal position when the lower end of the bulb reaches the lower end in the valve guide. If the light emitting tube 46 does not exist, the light emitted from the light projecting tube 46 is not received by the light receiving tube 47.

(effect) Next, the operation of the present invention will be explained.

When the valve insertion unit 7 is located directly above the valve supply device 38, for example for intake valves, in which a required number of valves, for example eight, are arranged, the hydraulic cylinder 6 is actuated to move the support arm 5 downward. Accordingly, the valve insertion unit 7 descends and stops descending when the valve gripping member 23 reaches a position where it grips the shaft portion from the head of the valve V.
Next, the hydraulic cylinder 17 and the hydraulic cylinder 20 operate to close the separately opened guide member 18 and lid body 22 so that they come into contact with each other, and insert the shaft of the valve V into the guide groove 18a of the guide member 18. The lid body 22 is fitted with some play and closes the opening of the guide groove 18a, so that the valve V is held between them. Next, the hydraulic cylinder 6 is actuated to raise the support arm 5, and at the same time, the valve insertion unit support seat 3 is rotated via the hydraulic cylinder 4 and gears (not shown). As a result, as shown in FIG. 2, the valve insertion unit is shifted and positioned above the cylinder head W, which is set with its combustion chamber side facing upward. When the valve insertion unit 7 is located above the cylinder head W, the cylinder head tilting device 26 tilts the cylinder head W at a required angle so that the axis of the valve guide G on the intake side becomes vertical.

This tilting of the cylinder head W is performed as follows.

First, the solenoid 32 is actuated to move the stopper pin 33 outward, and at the same time, the hydraulic cylinder 34 is actuated to tilt the horizontal lever 31 to either side. Accordingly, the rotation shaft 29 rotates, the V-shaped support member 30 tilts, and the tilt angle regulating pin 37
It stops when it comes into contact with. This completes the tilting.

Next, when the cylinder head W is tilted to a predetermined angle, the hydraulic cylinder 25 is activated to raise the cylindrical valve suction device 24. When the valve suction device 24 comes into contact with the rubber stem seal S attached to the lower end of the valve guide G, the hydraulic cylinder 25 stops operating, and the valve suction device 24 starts suctioning by a suction device (not shown). At the same time, the hydraulic cylinder 6 resumes its operation and lowers the valve insertion unit 7. When the valve insertion unit 7 descends while holding the valve V, the valve axis is aligned with the axis of the valve guide by the suction action of the valve suction device 24, as shown in FIGS. 8 to 10. It is inserted slightly into the mouth of the upper end of the valve guide. At this time, the valve insertion unit 7 is lowered to the lower end by the hydraulic cylinder 6. Then, the valve gripping member 23 that was gripping the valve V at this time
is opened, that is, the guide member 18 and the lid body 22 are separated, and the valve V is in a free state.

At the same time as this state is reached, the valve suction device 24 stops suction, the hydraulic cylinder 13 is activated, and the valve press rod support member 14 is lowered. As a result, the valve pressing rod 12 descends under the weight of the weight 11 and presses the head of the valve V with its lower end. Accordingly, the valve V is gradually inserted deeply into the valve guide G, and stops when it comes into contact with a step provided in the center of a rubber stem seal S fitted to the lower end of the valve guide. When the valve V comes into contact with the stem seal S and stops, the hydraulic cylinder 15 is activated to lower the valve pressing rod pressing member 16, and further press the valve pressing rod 12 downward by the lower surface of the overhang 16a. do. As a result, the valve, which had previously been prevented from descending by the stepped portion of the stem seal S whose diameter is slightly smaller than the valve diameter, is forcibly pushed out further, expands the inner diameter of the stem seal, and descends (No. 14). (Fig. 16).

When the intake valve is completely inserted into the valve guide as described above, the hydraulic cylinder 15 is activated to raise the valve pressing rod pressing member 16, and then the hydraulic cylinder 13 is activated to raise the valve pressing rod support member 14. raise. As the valve press rod support member 14 rises, the upper surface of its projecting portion 14a comes into contact with the weight 11, causing the valve press rod 12 to rise and return to its original position. Meanwhile, at the same time, the valve suction device 24 is also lowered and returned to its original position.

At the same time, the hydraulic cylinder 6 is operated to raise the valve insertion unit 7, and the valve supply device 38 for the exhaust valve is moved to hold the intake valve by the support arm 5 with the hydraulic cylinder 4.
Rotate it upwards. Also, during this time, the cylinder head tilting device 26 operates to move the cylinder head placed thereon into the exhaust side valve guide.
Tilt the exhaust valve to the opposite side so that the axis of G' is vertical, and then move the exhaust valve to the valve guide
It is inserted into G′.

(Effects of the Invention) Since the present invention has the above-described configuration and operation, it is possible to perform accurate valve insertion work mechanically without manual work. In addition, the intake valve and the exhaust valve can be correctly inserted into the valve guides on both the intake side and the exhaust side from the vertical direction. Therefore, it is possible to speed up the work and greatly improve work efficiency, and
This makes it possible to reduce the amount of labor required by workers. Furthermore, since the structure of the device itself is extremely simple, it can be manufactured at low cost, and there are many benefits to be gained by putting it into practical use.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the valve guide, Fig. 2 is a side view of the entire invention, Fig. 3 is an enlarged view of the valve insertion unit, Fig. 4 is a sectional view taken along line A-A in Fig. 3, and Fig. 5 is a sectional view of the valve guide. The figure shows a side view of the cylinder head tilting device, No. 6.
The figure is a partially cutaway side view of the valve insertion unit and the valve supply device, FIG. 7 is a partially cutaway front view of the valve feeder, and FIGS. 8 to 10
11 is a sectional view taken along the line B-B in FIG. 9, FIG. 12 is a plan view of the valve gripping member, and FIG. 13 is a partially omitted view of the valve gripping member. 14 to 16 are diagrams for explaining the operation of the valve pressing rod, and FIG. 17 is a diagram for explaining the operation of the valve insertion detection device.
FIG. 8 is an explanatory diagram of the operation of the stem seal fitting detection device. 7... Valve insertion unit, 7a... Valve gripping means, 7b... Valve pushing means, 9, 10...
Support plate, 26... Cylinder head tilting device, 3
8...Valve supply device.

Claims (1)

[Claims] 1 A device for inserting an intake valve and an exhaust valve into the valve guides on the intake side and exhaust side, respectively, which are assembled in the cylinder head of an engine so that their axes intersect obliquely, and each valve is inserted with the head facing upward. Each valve supply device for intake valves and exhaust valves is held so that it can be freely inserted and removed, and the necessary lifting device is used to raise and lower the valve supply device, and the valve supply device is set with the upper side of the valve supply device and the side facing the combustion chamber facing up. A valve insertion unit is provided, in which a holding means for removably holding the valve and a valve pushing means are attached to a support plate which is moved between the upper part of the cylinder head and the upper part of the cylinder head. Equipped with a cylinder head tilting device that tilts the cylinder head so that the axes of the side valve guides are alternately vertical, and the valve can be inserted with the cylinder head tilted so that the axes of the intake side valve guides are vertical. A valve insertion device into a valve guide in a cylinder head of an engine, in which an intake valve is inserted by a unit, and an exhaust valve is inserted with the cylinder head tilted so that the axis of the valve guide on the exhaust side is vertical. .