SU109099A1 - Adaptation to a two-storey single-crank sawmill frame for swinging its saw frame - Google Patents

Description

There are known adaptations to the sawing frame for the saw frame with the use of an eccentric mounted on the main shaft and connected to the saw frame by a curvilinear slide.

The proposed adaptation creates a new positive effect, which is expressed in the possibility and use for swing of the saw frame of inertial forces acting on the saw frame during its transition to the lower and upper dead points by using hydraulic cylinders.

FIG. 1 shows the position of the saw frame at the beginning of the stroke; in fig. 2 - at the beginning of idling; in fig. Figure 3 shows the contact of the stepped independent rollers with guide planes (view along arrow A in Figure 1).

Connecting rod; The forestry frames are hingedly connected with the plunger 2 located in the hydraulic cylinder 3, which is fixed in the lower traverse. On the latter, in the hinges 4, the levers 5 are installed with stepped rollers 6. The position of the levers 5 is fixed by sliding rods 7 with hydraulic cylinders 5.

Similar parts are also fixed in the joints 9 on the upper traverse.

The roller 6 is located in the lower fixed guides, the roller W in the upper movable guides, the position of which is set depending on the required inclination of the saws independently or the swing mechanism.

The design of the stepped independent rollers (Fig. 3) provides for the operation of each roller in contact with only one guide plane. Tire rubber should be used as the material for the rim of the rollers.

To guide the saw frame horizontally, adjustable sliders or rollers are provided, which are fixed in the upper and lower crossheads.

No. 109099-2

The job of the fixture is as follows. When the saw frame moves down and approaches to the bottom dead center (Fig. 2), due to the forces of inernia, the liquid from the hydraulic cylinder 3 is displaced and passes into the hydraulic cylinders 8. As a result of the elongation of the link, when the rollers (and / O in the guides, levers 5 the node becomes angled, deflecting the pilpal frame towards the guides, thereby allowing the saws to move away from the bottom of the kerf by an amount x.

When the saw frame moves up, at the moment of approaching the top dead center, under the action of inertial forces, the saw frame with the hydraulic cylinder 3 moves up, the plunger 2 is retained with a brace 1. The fluid from the cavities of the hydraulic cylinders 8 passes into the cavity of the hydraulic cylinder 3, and the reduction of the length t g 7 sets the saw frame is in the working position (Fig. 1), which ensures that the saws approach the bottom of the kerf in the log.

Subject invention

Adaptation to a two-story single-cone sawing frame for swinging its saw frame, characterized in that, in order to allow the saw frame to be rocked under the influence of inertial forces arising in it during its transition to lower and upper dead points, hydraulic a cylinder, the plunger of which is hingedly connected to the forest frame connecting rod, and for connecting the sawing frame with the guides, stepped rollers are used that are hingedly fixed on the arms located on the cross-arms, and These levers are fixed by sliding arms with hydraulic cylinders.

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FIG. one

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