JPH0131404Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a valve insertion device into a valve guide in a cylinder head of an engine.

(Prior art) When inserting a valve into a valve guide in a cylinder head, as shown in Fig. 1, the opening P at one end of the valve insertion side of the valve guide G may pick up impurities such as dust during the operation after the valve is inserted. It is quite difficult to insert the valve accurately without damaging the mouth of the valve guide because the angle is so acute that it does not interfere with the valve guide, and the clearance between the inner diameter of the valve V and the valve guide G is quite tight. It is.

However, in the past, the relationship between the valve and the valve guide was as described above, so if a valve insertion device or jig was to be used, the device or jig would be extremely complex in structure, which would pose a cost problem. Become. For this reason, the work had to be carried out manually by workers without using any aspiration equipment or jigs.
However, the work of inserting the valves was a very delicate work, and each valve had to be inserted one by one, which was not only hard labor but also poor work efficiency.

(Problems to be Solved by the Invention) The present invention has been devised in view of the above points, and inserts the valve into the valve guide using a device with a simple structure. This makes it possible to speed up the valve insertion work, increase work efficiency, and reduce the labor of the worker.

(Means for Solving the Problems) The present invention is characterized by a support plate that can be raised and lowered with a necessary lifting device and that can be positioned on the cylinder head, and that the support plate can be moved up and down. A valve press rod that freely passes through the rod and has a weight at its upper end, and a valve press rod support member that is raised and lowered with a required driving source fixed to the support plate and supports the lower part of the weight of the valve press rod. and a valve pressing rod pressing member that is raised and lowered with a required driving source fixed to the support plate and presses the upper end of the valve pressing rod;
A valve insertion unit consisting of a valve gripping member that grips the valve in a detachable and slightly tiltable manner below the support plate, and a suction opening that serves as a receiving part of the end of the valve guide and is connected to a required intake device. The present invention relates to a valve insertion device into a valve guide in a cylinder head of an engine, which comprises a cylindrical valve suction device and a valve suction device.

(Embodiments) The present invention will be described in more detail below with reference to illustrated embodiments.

In the figure, reference numeral 1 indicates a support column erected on a base 2.
Reference numeral 3 designates a valve insertion unit support seat which is attached to the support column 1 so as to be horizontally rotatable and which is rotated by a hydraulic cylinder 4 at a predetermined angle.
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 slidably attached to the guide rod 3a of the valve insertion unit support seat 3 so that it can be moved in the vertical direction. Moreover, it is moved up and down using a hydraulic cylinder 6 at a predetermined timing.

7 is a valve insertion unit, which includes a pair of upper and lower parallel support plates 9, which are moved horizontally along the support arm 5 using a hydraulic cylinder 8;
10, a valve pressing rod 12 which passes through the lower support plate 10 vertically movably at right angles and has a weight 11 at its upper end, and the upper support plate 9.
A valve press rod support member 14 that is raised and lowered with a hydraulic cylinder 13 fixed to the valve press rod 12 and supports the lower part of the weight 11 of the valve press rod 12 with a horizontal protrusion 14a, and the upper support plate 9.
A valve pressing rod pressing member 16 that is raised and lowered with a hydraulic cylinder 15 fixed to the valve pressing member 16 and that presses the upper end of the valve pressing rod 12 with a horizontal projecting portion 16a; It consists of a valve gripping member 23 that grips the valve in a downwardly removable and slightly tiltable manner. In the illustrated grip member 23, the guide member 1 is moved horizontally with respect to the support plate 10 using a hydraulic cylinder 17, and has a guide groove 18a with a slightly larger diameter than the valve shaft on its end face.
8 and the guide member 1 fixed to an end of a lever 21 that is rotatably supported with a support shaft 19 and rotated by the operation of a hydraulic cylinder 20.
The valve head supporting members 18b, 18b are protruding from the upper surface of the guide member 18 to support the valve head at two points around the tapered surface of the guide member 18. The guide groove 18a is formed using the support members 18b, 18b as a fulcrum.
It is now possible to tilt by the amount of play.

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, the cylinder is set in a predetermined position in an opening 24a at its upper end. The lower end of the valve guide G of the head W is received. Incidentally, the valve suction device 24 is arranged on the base of a cylinder head tilting device, which will be described later. Additionally, numeral 26 in the figure is a cylinder head tilting device, which is used to alternately insert valves into the import side valve guide and the exhaust side valve guide of the cylinder head W.

The cylinder head tilting device 26 is mounted on a base 27.
, a rotating shaft 29 horizontally penetrating the rising portion 28 erected on the base 27, a V-shaped support member 30 and a horizontal lever 31 fixed to both ends of the rotating shaft 29, respectively; A solenoid 3 is provided on the base 27, and a solenoid 3 is provided on the lower surface of one end side of the horizontal lever 31.
2, a stopper pin 33 that comes into contact with the stopper pin 33 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, and the V-shaped support member 30. is fixed to the top of the V
It consists of a cylinder head holding plate 36 having a reference pin 35 projecting from the center of the upper surface, which is tilted by the tilting of the letter-shaped support member 30. The cylinder head W placed on the cylinder head holding plate 36 is placed and fixed in a regular position using the reference pin 35 and a clamp member (not shown). Further, 37 is an inclination angle regulating pin.

Further, numeral 38 is an oil application device for applying oil to the shaft portion of the valve, and the oil storage tank 40 is supported by a valve holding cylinder 39 for holding the valve V in the center according to the number of valves. stand 41
There are 8 pieces lined up on the top.

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

When the valve insertion unit 7 is positioned directly above a required number of valves, for example eight, 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 of the valve V near the head.

Next, the hydraulic cylinder 17 and the hydraulic cylinder 20
is activated, the guide member 18 and the lid body 22, which are open apart, are closed and brought into contact, and the shaft portion of the valve is fitted into the guide groove 18a of the guide member 18 with some play, and the guide member 18 is inserted into the guide groove. The lid body 22 closes the opening of the valve 18a, and the valve V is held between them.

Next, the hydraulic cylinder 6 is actuated to support the support arm 5.
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, the valve insertion unit 7 is shifted and positioned above the cylinder head W as shown in FIG. When the valve insertion unit 7 is positioned above the cylinder head W, the cylinder head W is tilted at a required angle by the cylinder head tilting device 26 so that the axis of the inserted valve coincides with the axis of the valve guide. At the same time as the cylinder head is tilted in this manner, the hydraulic cylinder 25 is operated to raise the cylindrical valve suction device 24. When the opening 24a of 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 is opened by an intake device (not shown). Suction begins.

At the same time, the hydraulic cylinder 6 restarts its operation and lowers the valve insertion unit 7. When the valve insertion unit 7 descends while gripping the valve V, the valve gripped by the valve gripping member 23 so as to be able to tilt to a certain extent is moved by the suction action of the valve suction device 24, as shown in FIGS. 8 to 10. Then, the valve axis is adjusted so that its axis coincides with the axis of the valve guide, and the valve guide is slightly inserted 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. At this time, the valve gripping member 23 that grips the valve V opens, that is, the guide member 18 and the lid 22 are separated, and the valve V becomes free.

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. Along with this, valve V becomes valve guide G.
It is gradually inserted deeply into the valve guide and stops when it comes into contact with a step provided in the center of the 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 the lower surface of the overhang 16a presses the valve pressing rod 12 further downward. do.

As a result, the valve, which had previously been prevented from descending by the stepped portion of the stem seal S with a diameter slightly smaller than the valve diameter, is forcibly pushed out further, expands the inner diameter of the stem seal, and descends. 14 to 16.) When the valve is completely inserted into the valve guide, the pressureless cylinder 15 is actuated to raise the valve pressing rod pressing member 16, and then the hydraulic cylinder 13 is activated.
is actuated to raise the valve pressing rod support member 14. 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. At the same time, the hydraulic cylinder 6 is operated to raise the valve insertion unit 7, and the hydraulic cylinder 4 is used to rotate the support arm 5 to grasp the next valve.

(Effects of the Invention) Since the present invention has the above-described structure and operation, it is possible to mechanically and accurately perform valve insertion work without manual work. Moreover, the valve can be inserted without damaging the mouth of the valve guide. Therefore, it is possible to speed up the work and greatly improve the work efficiency, and also to reduce the labor of the worker. Furthermore, since the structure of the device itself is extremely simple, it can be manufactured at low cost, and it has many benefits when put to practical use.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the valve guide, Fig. 2 is a side view of the present invention, Fig. 3 is an enlarged view of the main parts of the present invention, 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 is a side view of the cylinder head tilting device, FIG. 6 is a partially cutaway side view of the valve insertion unit and oil applicator, and FIG. 7 is a partially cutaway front view of the oil applicator. 8 to 10 are explanatory diagrams of the operation of the valve gripping member, and FIG. 11 is B-B in FIG. 9.
A line sectional view, FIG. 12 is a plan view of the valve gripping member,
FIG. 13 is a partially omitted front view of the present invention in a state where the valve is gripped, and FIGS. 14 to 16 are explanatory views of the operation of the valve pressing rod. 9, 10... Support plate, 11... Weight, 12... Valve pressing rod, 13... Hydraulic cylinder, 14
... Valve press rod support member, 15 ... Hydraulic cylinder, 16 ... Valve press rod press member,
23... Valve gripping member, 24... Valve suction device.

Claims (1)

[Scope of utility model registration request] A support plate that can be raised and lowered with a necessary lifting device and can be positioned on the cylinder head; a valve pressing rod that passes through the support plate so as to be movable in the vertical direction and is provided with a weight at its upper end; and the support plate. It is lifted and lowered with the required driving source fixed to the
a valve press rod support member that supports the lower part of the weight of the valve press rod; and a valve press rod press member that is moved up and down with a required drive source fixed to the support plate and presses the upper end of the valve press rod; A valve insertion unit consisting of a valve gripping member that grips the valve in a detachable and slightly tiltable manner below the support plate, and a suction opening that serves as a receiving part of the end of the valve guide and is connected to a required intake device. A device for inserting a valve into a valve guide in a cylinder head of an engine, comprising a cylindrical valve suction device.