SU757314A1 - Arrangement for mounting and dismouting i.c. engine valve assembly - Google Patents

Description

The invention relates to mechanical engineering and can be used for the installation and dismantling of the internal combustion engine, in particular for the installation and dismantling of the valve timing mechanism.

A device for mounting a valve assembly of an internal combustion engine is known, comprising a spring-loaded rod arranged in a housing and a device for holding crackers in the form of spring-loaded latches located in the housing perpendicular to the axis of the rod [1].

A disadvantage of the known devices is the inability to use it to dismantle the valve assembly.

The purpose of the invention is to simplify disassembly of the valve assembly.

To achieve this goal in the proposed device, the rod is hollow and provided with a rod mounted in its cavity with the possibility of axial movement.

FIG. 1 schematically shows the device and the valve assembly in a disassembled form, the initial position; in fig. 2 - the same, intermediate position at installation2

same in fig. 3 - valve assembly assembly and fixture in the final position; in fig. 4 - the same, the initial position during dismantling; in fig. 5 - the same, intermediate position; in fig. 6 - the same in the final position during dismantling.

The device contains placed in the housing 1 rod 2 with a spring 3 and a device for holding crackers, made in the form of clamps 4 with springs 5 located in the housing 1 perpendicular10 to the axis of the rod 2. Inside the rod there is a movable rod 6. At the upper end of the rod 2 and rods fixed lamb 7 and nut 8. The lower end of the rod 6 is made in the form of glass 9. The valve assembly consists of a valve stem 10, a spring 11,

¹⁵ plates 12 and crackers 13.

The device works as follows.

When using a device for mounting the rod 6 must be inside the rod 2.

20 For this rotation of the lamb 7 upper

end of stem 6 extends from nut 8 to

stop (see Fig. 1). When moving the housing 1 away from any actuator in the direction of the valve stem 10, continuously re-757314

3

the plate 12 is hampered and the spring 11 is compressed. The crackers 13 having an inner annular shoulder of a smaller diameter than the diameter of the valve stem 10, having moved to the valve stem 9, stop and fall into the housing 1, compressing the spring 3. The stop of the crackers lasts until the plate 12 will not impede the movement. Due to the chamfer at the end of the valve stem 10 and the force from the retainers 4, the crackers 13 are wedged and under the action of the rod 2 move along the valve stem 10 until the annular shoulder of the crackers 12 coincides with the ring groove of the rod 10. In this case valve performance retainers 13 biscuits 4 is crimped on valve shaft 9 (see. Fig. 2). During the reverse movement, the plate 12 covers the breadcrumbs 13 (see Fig. 3), and in this process the valve assembly remains assembled.

When using the dismantling device, the rod 6 is pushed out of the rod 2. To do this, the upper ₂₀ end of the rod is screwed by turning the nut 7 into the nut 8 until it stops (see Fig. 4). When moving the housing 1 in the direction of the valve stem, the cup 9 of the stem 6 abuts against the upper edge of the crackers 13 and begins to press the spring 3. The housing 1, resting against the plate 12, 25 begins to move it down. The crackers 13 due to the annular shoulder and the annular groove on the valve stem 10 remain in place. When the plate 12 completely frees the crackers 13, the upper plane of the plate 12 is below the crackers ⁰

four

13, the cup 9 under the action of the spring 3 enters the gap between the breadcrumbs and the valve stem and pushes the crackers 13 so that they completely release the valve stem 10 (see FIG. 5). The tabs 4, located around the perimeter, press the crackers 12 to the glass of the stem 6 and do not allow them to fall to their original place. When moving the tool body 1 up frees the plate 11 and the bar 2 by the spring 3 pushes the crumbs from n _y. ^ Posobleniya on plate 11 (see. FIG. 6).

The proposed design of the device allows for the assembly and disassembly of the valve assembly, which increases labor productivity.

Claims (1)

Claim A device for mounting and dismounting the valve assembly of an internal combustion engine, comprising a spring-loaded rod placed in the housing and a device for holding crackers, made in the form of spring-loaded latches located in the housing perpendicular to the axis of the rod, characterized in that, in order to simplify disassembly, the rod is hollow and provided with a rod mounted in its cavity with the possibility of axial movement.