Device for screening and ventilation of the greenhouse

 

(57) Abstract:

The device can be used both in industrial and in individual greenhouses. The combination of mechanisms of helical gears and the screw - nut transmits the movement of the window in the ventilation system or beam curtains in the system curtaining. Communication mechanisms implemented in the form of an internal thread driven gear helical gears with external screw threads of a pair of screw - nut. By fixing the driven gear without the possibility of longitudinal movement decreases the torque on the control shaft compared to, for example, rack and pinion with the same drag force on the target element. The resulting braking the final link system allows you to enter manual or combo drive ventilation and curtaining. 9 Il.

Usage: industrial and individual greenhouses.

The inventive device for screening or ventilation (opening Windows) greenhouses contains the driving and driven gears, made with helical gearing, the leading gear fixed on the drive shaft and the driven gear is threaded contact screw anchor is tilesii or beam with curtains in the system curtaining.

The invention relates to structures, systems, screening and ventilation of greenhouses and can be used in the agricultural industry, as well as in farms and individual greenhouses.

Known ventilation of greenhouses, which includes the actuator, kinematically associated with the distributor shaft, which is fixed to gear vent mechanisms slats which are pivotally connected with design [1].

The disadvantage of this system of ventilation of the greenhouse is the need to introduce in the kinematic chain actuator - camshaft - gear rail link, providing braking system (brake, a ratchet, a large gear ratio of the drive and so on), as a pair of gear - rack alone is not fixed under load; the need to transfer large torque camshaft, as a pair of gear - rack only converts the rotary motion of the shaft into reciprocating motion of the rack and creates on the distributor shaft opposing torque from the weight of the vents. In this regard, the length of the shaft (and therefore the amount of vent mechanisms mounted on the shaft) limited the unification of parts and components with screening for one and the greenhouse.

Known system curtaining greenhouses, which includes the actuator, kinematically associated with the distributor shaft, which is fixed to the gear rack and pinion gears, moving thrust with beams attached to them [2].

The disadvantage of this system of screening is necessary to transfer the camshaft large torque from the forces of the resistance movement of the focal plane, a pair of gear - rack only converts the rotary motion of the shaft into reciprocating motion of the rack and the gain in strength, the length of the shaft (and hence the amount of a rack gear installed on the shaft) is limited by its torsional stiffness from the opposing moment; not smooth; the presence of noise in the system; lack of unification of parts and components with the ventilation system.

Closest to the claimed device for ventilation and screening of the greenhouse to the technical essence is a device for ventilation of a greenhouse, comprising vent mechanisms, gears which are connected with a drive through the camshaft, and Reiki one end pivotally connected with the window, and services on the distributor shaft (located along the front of the curtain and associated with the drive system curtaining), and slats are rigidly connected with rods that are attached beams attached to one end of the curtain of the screen [3] is a prototype.

The disadvantage of the prototype is the need to transfer large torque camshafts ventilation and curtaining, and therefore limited in their length, and hence the number of actuators systems installed on the same shaft; the need to have in the kinematic chain of the ventilation system link, providing the braking system under load, the presence of noise in the system; there is no standardization of parts and components of ventilation systems and curtaining.

The purpose of this invention is to provide an actuating mechanism for driving the air vents for ventilation and to stretch the curtain of the screen in the system curtaining greenhouses, combining the functions of the known device (rack gear) ventilation systems or curtaining, namely converting rotary motion into reciprocating with the simultaneous achievement of a new technical result, namely the reduction of the torsional moment on the shaft (limiting the number of actuators, mounted on the same shaft), obese torque on the camshaft, and thus make possible the unification of parts and components of ventilation systems and curtaining.

Put the chain is achieved by the fact that in the known device for screening or ventilation of greenhouses, including gearboxes, wheel gear which is connected with a drive through shafts, and led with the Executive device, such as a window for ventilation or beam on which is fixed a curtain, curtain, leading and being led gear reducer is made with helical gearing, while the driven gear is threaded, for example trapezoidal, metric, pipe, etc., in contact with the screw fixed without the possibility of rotation around its own axis by the actuator, for example, the window or beam with curtains, and fixed against axial movement in the housing.

The helical gearing of the input link of the proposed device provides transmission of rotation about intersecting axes, smoothness, noise reduction and growth carrying capacity of the transmission. Output the link made in the form of a pair of nut - screw converts rotary motion into reciprocating movement conecuh rack and pinion analogs and prototypes with the same drag force on the target element. Required torque depends only on the tangent of the elevation angle of helix pairs of nut - screw, which is ten times reduces this moment in comparison with a pair of gear - rack of known devices, and it can increase the length of the shaft that transmits rotation (and hence the length of the vents or the length of curtain screen, open one shaft), or to reduce the required torque on the output shaft of the actuator. In addition, the ventilation system is used as the output link of a pair of nut - screw provides braking at any position of the window and thereby prevents the transmission of torque from the weight of the air vents on the camshaft, which excludes emergency associated with the fall of the air vents when violations rigid connection of shafts with the drive or with the failure of the drive.

The proposed device in comparison with analogues and prototype allows to unload the drive shaft from significant torque and thus increase their load-carrying ability to use drives with less in comparison with analogue and prototype torque output while simplifying systems of ventilation and screening greenhouses due to the exclusion of the kinematic chain polivaetsya unification of parts and components of systems of screening and ventilation, both systems used the same design of gears, and parts associated with them.

In addition, the ventilation and screening there is a new property that is unattainable in the known solutions, namely:

due to the significant reduction of the required torque distribution on the shafts of the systems and the ability to vary the magnitude of the torque due to the change of the angle of helix pairs of nut - screw, as well as the appearance of additional properties - braking the final link system allows manual or combo drive ventilation and curtaining.

In Fig. 1 shows the proposed device for ventilation or screening greenhouse.

In Fig. 2 shows the section a-a in Fig. 1 the proposed device.

In Fig. 3 shows in plan the fragment system curtaining greenhouse.

In Fig. 4 shows cross-section B-B in Fig. 3 system curtaining greenhouse.

In Fig. 5 shows a diagram of the ventilation system of the greenhouse with the flaps of the belt type.

In Fig. 6 provides a view of B in Fig. 5 on the ventilation system with the tape window.

In Fig. 7 shows in PA Fig. 7 ventilation of the greenhouse with a modular design.

In Fig. 9 depicts a node D in Fig. 8, showing the screw connection of the device with relationships, resulting in the action pane of the modular type.

The system of screening and ventilation system contains gears 1, which includes leading gear 2 and the driven gear 3 made with helical gearing. Leading gear 2 are secured on the shaft 4 (for example a screw 5) connecting the gears 1 with the actuator 6. Gear 3 on the inner diameter across the threads in contact with the screw 7 and are secured in the housing 8 against axial movement of the sleeves 9. The screw 7 is fixed without the possibility of rotation on the air vents 10 in ventilation systems with belt air vents, or on the rod 11 attached to them by means of the clamp 12 beams 13 with curtains 14 in the system of the curtain, or on rods 15 attached to them by means of clamps 16 rods 17, resulting in the action pane 18 modular ventilation system.

The principle of the device for screening and ventilation of the greenhouse next.

When turning on the actuator 6, the rotation is transmitted through the shaft 4 on the driving gear 2 and through helical gearing on the driven gear 3. the progressive movement of the screw 7 (under rotation around its own axis) by svorachivaniya or twisting it in the thread driven gear 3.

Screw 7 that is associated with the pane 10 belt type or by means of rods 15 and rod 17 with the modular window 18 in ventilation systems, with its movement opens or closes the air vents of the greenhouse.

Screw 7 that is associated with the beam 13 mounted on it with a curtain 14 in the system of the curtain, with its movement, stretches and folds the blinds greenhouse.

Literature

1. Patent GDR N 213117, class A 01 G 9/24.

2. Patent Holland N 8602256, class A 01 G 9/22.

3. Patent Holland N 8700195, class A 01 G 9/22.

Device for screening and ventilation of greenhouses, including gearboxes, wheel gear which is connected with a drive through shafts and driven from the Executive device, such as a window for ventilation or beam on which is fixed a curtain, curtain, characterized in that the gear reducers are made with helical gearing and the driven gear is fixed against axial movement in the housing, through the groove on the inner diameter connected with a screw fixed without the possibility of rotation around its own axis by the actuator, for example, the window in the ventilation system or a beam with a curtain in the system curtaining.

 

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