RU2232673C2 - Round-sawing machine - Google Patents

Abstract

FIELD: forest industry, applicable for sawing of timber.

SUBSTANCE: the round-sawing machine has a bed, planetary moving gear, balancing frame with a sawing shaft and an electric motor having two outlet ends. One outlet end is coupled through a transmission to the sawing shaft, and a satellite gear and a hinged carrier of the planetary moving mechanism are rigidly fastened on the other. The central wheels of the outer and inner engagements mounted on different shafts through clutches and belt transmissions are engaged with a DC generator shaft, with an inverter installed on whose outlets. The generator exciting winding is provided with an exciting current controller.

EFFECT: rational use of energy spent on braking and turning of the balancing frame.

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Description

The invention relates to the forest industry and can be used for sawing timber.

A device for the transverse sawing of wood, comprising a bed, a balancing frame with a saw shaft and an electric motor [1].

The disadvantage of this machine is its low productivity, due to the possibility of sawing timber on a single conveyor.

A circular saw is also known, including a bed, a planetary thrust mechanism, a balancing frame with a saw shaft and an electric motor having two output ends, one of which is connected to the saw shaft, and the gear-satellite and the planetary thrust mechanism are pivotally mounted on the second, the central wheel external gear which is equipped with a pulley and brake. The balancing frame is rigidly connected to the carrier, equipped with a spring-loaded ball retainer, interacting with the shaft of the central wheel, on the hub of which the central internal gear wheel with a pulley and brake is pivotally mounted [2].

The disadvantage of this prototype is the irrational use of energy spent on braking and turning the balancer frame.

The purpose of the invention is energy saving.

This is achieved by the fact that the central wheels of the external and internal gearing are connected to the shaft of the direct current generator through the inverters by means of gears mounted on different shafts through controlled clutches and belt drives.

Figure 1 shows the proposed circular saw machine, a General view, figure 2 - section aa in figure 1; figure 3 is a section bB in figure 2; figure 4 is a control circuit of a DC generator.

The circular saw includes a bed 1, a planetary sliding mechanism 2, a balancing frame 3 with a saw shaft 4 and an electric motor 5 having two output ends 6 and 7. The output end 6 is connected to the transmission 8 with the saw shaft 4. A gear is rigidly fixed to the output end 7 - satellite 9 and articulated - drove 10 planetary thrust mechanism. The Central wheel 11 of the external engagement with the pulley 12 is connected by means of gears 13 and 22, a controlled clutch 24 mounted on the shaft 23, a belt drive 25 with the shaft of the generator 29.

The balancing frame 3 is rigidly connected to the carrier 10, which is equipped with a ball lock 14 with a spring 15. The latch 14 interacts with the shaft 16 of the central wheel 11. On the hub of the wheel 11, the central inner gear 17 is pivotally mounted to the pulley 18, which is connected by a gear transmission 19, controlled clutch 27 mounted on the shaft 26, the belt drive 28 with the shaft of the generator 29.

The DC generator 30 is connected to the network through an inverter 33. The field winding 31 of the generator is equipped with a current controller 32.

The machine operates as follows.

The electric motor 5 is turned on. The circular saw 20 receives rotation from the electric motor through transmission 8, gear 9 and gears 11 and 17. The controlled clutches 27 and 24 are disconnected at this moment. The excitation current of the generator using the controller 32 is reduced to zero.

To carry out the movement of the slide of the saw on the sawed material 21, include a clutch 27, while the torque from the pulley of the wheel 17 is transmitted to the shaft of the generator 29 through gears 19, 28 and shaft 26. When the excitation current is increased by means of the regulator 32, the braking electromagnetic moment increases the shaft of the generator, which leads to a decrease in the speed of rotation of the wheel 11, and the pinion gear 9 begins to move around the axis 16, the ball retainer 14 depresses the spring 15, while the energy is recovered to the network.

Together with the gear 9, the balancing frame 3 rotates, while the center of the circular saw 20 describes the trajectory of movement - the circle. The speed of advance of the saw is regulated by changing the current of the field winding.

The return stroke from any position is done by disengaging the clutch 27 and engaging the clutch 24. When the excitation current is increased, the braking torque is transmitted through the gears 25, 22, 13 and the shaft 23 to the central wheel 17, which reduces its rotation speed, while the gear 9 begins to move around the shaft 16 in the opposite direction, and with it the balancing frame, while there is energy recovery in the network.

The control of the reverse speed of the saw blade 20 is also carried out by changing the magnitude of the excitation current.

Using this circular saw allows you to use the energy spent on braking and turning the balancing frame with its subsequent recovery into the network using a DC generator.

Sources of information

A.S. USSR No. 134839, class At 27 At 5/00.

2. A.S. USSR No. 1074714, class At 27 At 5/00.

Claims (1)

A circular saw, including a bed, a planetary thrust mechanism, a balancing frame with a saw shaft and an electric motor, characterized in that for the rational use of energy spent on braking and turning the balancing frame, with its subsequent recovery into the network, the central wheels of external and internal gearing by means of gear gears mounted on different shafts, through controlled clutches and belt drives are connected to the shaft of a DC generator, at the terminals of which an inverter is installed torus.

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