RU1776826C - Device for adjusting valve clearances in valve-actuating gear of internal combustion engine - Google Patents

Abstract

SUMMARY OF THE INVENTION: the device comprises a socket wrench 1 and a screwdriver 2, provided with disks 9 and 15 with scales 10 and 16. In order to facilitate the adjustment process, it is supplemented by a calibrated plate 3 mounted on the key 1 using a swivel bracket 17. 3 ill.

Description

Figure 1

The invention relates to a hand tool for adjusting clearances in the valves of an internal combustion engine,

A device is known for adjusting clearances in the valves of a gas distribution mechanism of an internal combustion engine, comprising a wrench and a screwdriver. Unscrewing the nut of the adjusting bolt with a wrench, screw the adjusting screw with a screwdriver until it stops against the gas distribution bar and then unscrew it to the required clearance. But such a device is inconvenient in operation and unproductive. These disadvantages are eliminated in the device with a coaxial spanner and screwdriver.

A known device for adjusting the gaps in the valves of the gas distribution mechanism of an internal combustion engine comprises a coaxially mounted end wrench and a screwdriver provided with dial discs. After installing the key on the nut of the adjusting bolt and grasping it with it, unscrew the nut, the adjusting bolt, which they tighten with a screwdriver against the gas distribution mechanism rod, and then unscrew it to the required clearance, determining it using the scales on the key and screwdriver. But such a device has a significant drawback in that when the nut is tightened, the adjusting bolt held by the screwdriver from twisting turns under the action of the nut, causing the gap to depart from the set.

The purpose of the invention is to simplify operation, increase the accuracy of regulation and prevent i from changing the set gap when tightening the nut of the adjusting bolt,

This object is achieved in that the device for adjusting the clearances in the valves of the gas distribution mechanism of the internal combustion engine, comprising a coaxially located socket wrench and a screwdriver provided with disks with a scale, is made with a plate with a thickness equal to the size of the gap between the adjustment bolt and the gas distribution rod secured by brackets to a ring rotatably and longitudinally movable on the outer surface of the key. After setting the necessary gap between the adjusting bolt and the rod of the gas distribution mechanism, a plate is installed with a thickness equal to the size of the gap between them, which is why

When tightening the nut, the adjusting bolt, resting on the plate, will not rotate, reducing the clearance.

In FIG. 1 shows an apparatus for adjusting gaps in valves of a gas distribution mechanism of an internal combustion engine, a general view with a notch; in FIG. 2 - the same, top view; FIG. 3 is a view A of FIG. 1.

0

The device for adjusting the clearances in the valves of the gas distribution mechanism of the internal combustion engine comprises a coaxially located socket wrench 1, a screwdriver 2 and a plate 3. The socket wrench 1 is designed to loosen and tighten the nut of the adjustment bolt of the gas distribution engine mechanism.

0 The wrench 1 consists of a handle 4 with a square end 5, on which a nut head 6 with a hexagonal inner surface and a cylindrical outer surface 5 is mounted using a square hole. It is fixed to the square end of the handle with screws 7 that are screwed coaxially holes at the square end of the handle and head. On handle 4, key 1 is fixed

0 is a knob 8 and a disc 9 with a scale 10 graduated in units of length, in tenths of a millimeter. Inside the key 1, a hole 11 is made along the central axis, in which a screwdriver 2 is placed with the possibility of rotation and longitudinal movement. It is designed to loosen and tighten the adjusting bolt of the engine gas distribution mechanism. The screwdriver consists of a cylindrical rod 12 with a handle 13 of a spherical shape and a flat working element 14 for installation of an adjustment bolt in the slot. A disk 15 with a scale 16 is mounted on a screwdriver. Plate 3 is designed to install it

5 in the gap between the adjusting bolt and the engine timing rod before tightening the adjusting bolt nut to prevent it from twisting by the efforts of the nut and

0 maintaining the clearance thus established. The plate 3 is placed on brackets 17 mounted rotatably in the vertical plane on the axes 18, mounted on a ring 19 mounted 5 with the possibility of rotation and longitudinal movement on the outer cylindrical surface of the head 6 of the key 1. To limit the longitudinal movement of the ring 19 on the head 6 limiters 20 and 21 are made,

The device operates as follows.

The engine valves 22 are intended for admitting the working mixture to the cylinders and exhausting exhaust gases from them. They are constantly pressed to the sockets by means of springs 23. To divert the valve from the socket, a gas distribution mechanism is introduced into the engine design, consisting of a shaft 24 and bumps (cams) 25, pushers 26, rods 27, rocker arm 28 mounted on axis 29 and which is a two-arm lever, at one end of which is placed coaxially with the valve stem 22 of the strikers 30, and at the other end is an adjustment bolt 31 coaxially with the rod 27 with a slot 32 on the end side for the hole. The adjustment bolt is threaded and screwed into the threaded hole on the beam and secured with a nut 33. Due to the fact that the valves operate at high temperature, the metal rod is extended and a gap exists between the valve shaft and the rocker arm to compensate for this extension. expressed in fractions of a millimeter. The plate 3 is installed in the gap Si, and in the gap S2, which is congruent with the gap Si and it depends on the ratio of the arms of the rocker arm.

When the rocker arm 28 is rotated on the axis 29, when the hammer 30 is in contact, a clearance S2 is formed on the valve 22 side, congruent with the Si gap. The thickness of the plate 3 is equal to the gap S2. For different engine sizes, these gaps are different, therefore, the thickness of the plate 3 for different engine sizes is different. The sizes of the nuts 33 of the adjustment bolt for different engine sizes are different, therefore, the nut heads 6 with the plates 3 are made voluminous and adjacent. During the operation of the engine, the gaps change, becoming more or less than optimal, therefore, the intake of the working mixture into the cylinders and the exhaust gas from them is incomplete and the engine does not develop the required power, therefore, after a certain time this gap is measured and adjusted, setting the optimal one. To adjust the gap between the valve stem 22 and the rocker arm 30 of the rocker 28, the valves 22 are freed from vertical loads by turning the shaft 24 and removing the protrusion 25 from the follower 26, causing the springs 23 to press the valve 32 against the socket and a gap will be felt between the valve stem and the rocker arm . After measuring the gap, it is adjusted if it differs from the optimum.

To do this, use the wrench head w of the key 1 to grasp the nut 33 of the adjusting bolt 31 and, using the handle 4 and the knob 8, turn the key 1 in the direction of unscrewing 5, loosing the adjusting bolt 1 of unfastening the nut. After that, the working flat element 14 of the screwdriver 2 is inserted into the slot 32 of the adjusting bolt 31 and, using the handle 13, twist

0 adjusting bolt 31 until it stops in the rod 27 of the gas distribution mechanism. Combine zero indicators on scales 10 and 16 and, using handle 13,. unscrew with a screwdriver 2 adjustment 1

5 bolt 31 to the necessary division on the scale, for example 0.5 mm. This means that a gap of 0.5 mm is established between the valve stem 22 and the rocker arm 30. In the gap between the adjusting bolt

0 31 and the rod 27 establish the plate 3 by turning the brackets 17 relative to the axes 18. Using the handle 4 and. the screw 8 is tightened with a wrench, 6 nut 33, secured the adjusting bolt 31

5 on the beam 28. Slide the plate 3 out of the gap between the adjusting bolt and the rod by turning the brackets 17 on the axles 18 and remove the device from the adjusting bolt. Then, the gaps in the remaining valves of the engine are similarly adjusted. When adjusting the clearance in the valves of the engine of another size in the device, replace the nut head b complete with the plate 3, for which the screws 7 are unscrewed,

5, the 4 head is removed from the square end of the 5 handles 4 and a nut head b of a different size is installed complete with a plate 3 of the corresponding size. Align the holes on the square end 5

0 and head b and screw the screws into them 7. The device is ready for adjustment of valve clearances, which is carried out by a similar method.

Claims (1)

The claims 5 A device for adjusting the clearances in the valves of the gas distribution mechanism of an internal combustion engine, comprising a coaxially mounted socket wrench and a screwdriver equipped with discs with a scale, characterized in that, in order to simplify operation and improve the accuracy of regulation, it is equipped with a plate with a thickness equal to the value of the installed clearance 5 secured by a swivel bracket to a ring, the latter being mounted on an end wrench with limited axial movement. -tEE