RU118320U1 - SCREW FEEDER OF THE WORKING BODY OF THE SNOW-REMOVING MACHINE - Google Patents

Abstract

1. Screw feeder of the working body of the snowblower, characterized by the presence of a composite central milling cutter (1) formed from left and right half-cutters (1.1) and (1.2), made in the form of multidirectional winding relative to one another, screw blades in the form of a with the possibility of forced rotation on the first (2) and second (3) gearbox supports, while the first side half-cutter (4), made in the form of a unidirectional winding, adjoins the first gearbox support (2) coaxially to said composite central mill (1) with the adjacent half-cutter (1.1) of a compound central mill (1) by a helical blade in the form of a straight helicoid, connected to the first support-reducer (2) with the possibility of forced rotation, and adjoining the second support-reducer (3) coaxially to the mentioned compound central mill (1) the second side half-cutter (5), made in the form of a unidirectional winding with an adjacent half-mill (1.2), a composite central f cuts (1) with a helical blade in the form of a straight helicoid, connected to the second support-reducer (3) with the possibility of forced rotation, while the outer end of the first side half-mill (4) is equipped with the first overload clutch (6), and the outer end of the second side half-mill ( 5) is equipped with a second safety clutch (7), and each of the helical blades of the semi-cutters (1.1) and (1.2) of the compound central milling cutter (1) from the side of the adjacent ends is equipped with an unloading device (10) having a U-shaped profile. ! 2. Screw feeder of the working body of the snowblower according to claim 1, characterized by the presence of the first (8) and second (9) spreaders, made

Description

The utility model relates to the field of municipal engineering and can be used in devices for clearing snow from roads, territories of sports complexes and runways of airfields, preferably in the working body of rotary snow blowers.

From the prior art, a screw feeder of the working body of a snow-removing machine [1] is known, consisting of two half-mills with helical blades mounted in the blade coaxially and made in the form of a direct helicoid, located around a circle concentrically to the internal surface of the blade, with a direction (opposite to the axis of symmetry of the blade) winding and equipped with extreme supports mounted on the inner side of the side cheeks, and a central support fixed on the inner surface of the blade covering the screw feeder, cat The second one is equipped with a drive gear located in the central support [1].

A disadvantage of the known device is a sharp increase in the stress state of the body metal structures that occurs during the maneuvering of a snowplow in a snow massif with a height of more than half the radius of the screw feeder. This is due to the fact that the side cheeks, on the inner side of which the extreme supports of the screw feeder are installed, have a developed passive surface covering more than half of the area of the feeder end, which, when turning the machine, interact with the undeveloped feeder wall of the snow face, as with an insurmountable obstacle, which leads to increase the resistance to rotation of the machine, the value of which causes a jump in the stress state in the metal structures of the working body above the yield strength of the material used a. Multiple dynamic loading (during the snow removal) of metal structures with lateral force, combined with the resistance force arising from the movement of the snow blower in patrol mode, leads to a loss of mechanical stability of the supporting elements of the metalwork of the working body and, ultimately, to their relatively quick destruction.

The second disadvantage of the known device is the low throughput of the screw feeder in the area of the receiving pipe. This is because the mass of snow developed by the helical blades is fed to the receiving nozzle with absolute speed, the vector of which is directed practically along the axis of rotation of the screw feeder. The latter is due to the fact that the design of the screw blades in the area of the receiving pipe does not allow changing the nature of the snow mass movement and the magnitude of the radial component of its absolute speed. Therefore, the value of the mentioned radial component of the absolute speed when using the known device is small. Therefore, the harvested snow mass transported by the helical blades does not have a sufficient supply of kinetic energy, which would ensure the accelerated loading of the harvested snow mass into the receiving pipe. As a result of these conditions, the snow flows moved by the helical blades collide with each other, the snow mass rapidly accumulates in the middle part of the blade, followed by its compaction by the screw blades and, as a negative result, the kinetic energy dissipates from the snow mass collected by this snow mass in the process moving to the intake pipe. Thus, the loading of loosened snow loosened by helical blades into the receiving branch pipe of the snow-removal machine occurs mainly due to the dynamic pressure of the snow-mass removed due to the snow-removing machine moving in the snow face, with some of the snow mass being cleared through the screw blades and thrown out to the face (width which is determined by the transverse size of the blade proper).

In addition, the gear drive of the screw feeder, located in the middle of the aforementioned blade, partially closes the inlet pipe, reducing its flow area and, thereby, significantly limiting the throughput of this pipe.

In addition, the contact and interaction of the compacted snow mass, dynamically formed in front of the screw feeder with the housing of the drive gear of the screw feeder, causes the appearance of additional mechanical resistance, which, in addition to reducing the productivity of snow removal, is a reason for a significant increase in the energy consumption of the snow removal process. Therefore, the working process of the known device is accompanied by unproductive energy consumption for unnecessary compaction of previously loosened, harvested snow mass, and the core of compacted snow formed in front of the feeder has strong resistance to the movement of the snow blower in the snow face (along the snow course).

The above factors together cause a decrease in the operating speed of the snowplow and, accordingly, lead to a significant decrease in its productivity as a whole.

The closest known analogues in terms of technical nature and the achieved result is a screw feeder of the working body in a snow blower [2] Structurally, it is characterized by the presence of a composite cutter formed from the left and right half cutters, made in the form of helical helices in opposite directions to winding relative to one another; each, between which the support gear is placed. The left and right half cutters are mounted coaxially with the possibility of forced rotation from the aforementioned gear support. A divider made in the form of a segment, the end of which is oriented in the direction of movement of the snowplow, is rigidly mounted on the front side of the support gear. The end surface of the divider segment is profiled by protrusions.

This device is taken as the closest analogue, i.e. prototype.

The disadvantage of the prototype is the relatively low productivity due to the placement of the support gear in the central part (middle) of the screw feeder. This circumstance leads to the fact that the support-reducer of the screw feeder partially closes the snow receiving pipe, reducing its cross section and, thereby, significantly limiting the throughput of this pipe. Snow removal performance is reduced.

In addition, the contact and interaction of the compacted snow mass, dynamically formed between the screw feeder and the housing of the gear reducer of the screw feeder of the working body, causes the appearance of additional mechanical resistance, which, in addition to reducing the snow removal performance, is a reason for a noticeable increase in the energy consumption of the snow removal process. Therefore, the working process of the known device is accompanied by unproductive energy consumption for unnecessary compaction of previously loosened, harvested snow mass, and the resulting compacted snow core has strong resistance to the movement of the snow blower in the snow face (i.e. along the snow course).

The above reasons cause a decrease in the performance of the snowplow.

The task to which the creation of the device is aimed within the framework of this utility model is to increase the efficiency (including due to the availability factor) of using snowblowers equipped with a working body based on a screw feeder.

The technical result, expected from the use of the claimed device, is to increase the productivity of snow removal.

The claimed technical result is achieved in that the screw feeder of the working body of the snow blower includes a composite central cutter formed from the left and right half cutters, made in the form of helical blades in the form of a direct helicoid, each directionally rotated in opposite directions, mounted with the possibility of forced rotation on the first and second support gears, while the first side half-mill is adjacent to the first support gearbox, coaxially referred to the composite central mill; a helical blade in the form of a straight helicoid shaped in the form of a straight helical unidirectional winding with the adjacent half cutter of a composite central mill, connected to the first gear support with the possibility of forced rotation, and the second side half mill adjoins, coaxially referred to the composite central mill, made in the form of a helical blade in the form of a straight helix in the form of a unidirectional winding on a winding with an adjacent half cutter of a composite central mill in the form of a direct helicoid, connected to the second gear support with the possibility of compulsory rotation, while the outer end of the first side half mill is equipped with a first safety clutch, and the outer end of the second side half mill is equipped with a second safety clutch, each of the helical blades of the half cutter of the composite central mill from the sides adjacent to each other is equipped with an unloading device having P- shaped profile.

It is preferable that the screw feeder of the working body of the snow blower is equipped with the first and second dividers made in the form of a segment, each of which is rigidly fixed, respectively, on the front side of the first gear support and the front side of the second gear support, and is oriented along the segment end movement of the snowplow, while the surface of the ends of the segments of both dividers was profiled by protrusions.

The proposed device is illustrated by drawings. Figure 1 schematically shows the composition of the screw feeder of the working body of the snowplow; figure 2 shows the appearance of the proposed device (top view); figure 3 shows the appearance of the proposed device (front view on the right); figure 4 shows the appearance of the proposed device (rear view on the left); figure 5 shows the appearance of the composite Central mill (front view to the right); figure 6 shows the appearance of the proposed device (rear view from bottom to bottom left); 7 shows the appearance of the first side half cutter (front view on the right); on Fig presents the appearance of the first side half cutter (rear view); figure 9 presents the appearance of the second side half cutter (front side view); figure 10 presents the appearance of the second side half cutter (view from the right end).

The list of positions:

1. Compound central mill.

1.1. Left half cutter.

1.2. Right half cutter.

2. The first support gear.

2.1. The first hydraulic clutch.

3. The second support gear.

3.2. Second hydraulic clutch

4. The first side cutter.

5. Second side half cutter

6. The first safety clutch.

7. Second safety clutch.

8. The first divider.

9. The second divider.

10. Unloading device.

11. The supporting wheels of the screw feeder.

The screw feeder of the working body of the snow blower is formed by a composite central mill 1 (Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6) in the form of left 1.1 (Figure 2) and right 1.2. (Figure 2) half cutter.

Mentioned left and right half cutters 1.1 (Figure 2) and 1.2. (FIG. 2) are helical blades in the form of a direct helicoid connected in a coaxial manner by mutual adjacency of one of their ends in a helical shape in the form of a direct helicoid.

The outer ends of the aforementioned left and right half cutter 1.1 (Figure 2) and 1.2. (FIG. 2) are installed with the possibility of forced rotation, respectively, on the first support of the gear 2 (FIG. 1, FIG. 2, FIG. 3, FIG. 4) and the second support-gear 3 (FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 10).

In the case of using a hydraulic machine as said gearbox, both the first 2 (FIG. 1, FIG. 2, FIG. 3, FIG. 4) and the second 3 (FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 10) the support gear are respectively equipped with a first hydraulic clutch 2.1 (FIG. 2, FIG. 3, FIG. 4) and a second hydraulic clutch 3.2 (FIG. 2, FIG. 3, FIG. 4) for connection to a snow removal hydraulic system cars.

Also coaxial to the composite central milling cutter 1 (Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6) on the opposite side of both support gears 2 and 3 (Fig. 1, Fig. 2, Figure 3, Figure 4) respectively installed the first side half cutter 4 (Figure 1, Figure 2, Figure 3, Figure 4) and the second side half cutter 5 (Figure 1, Figure 2, Figure 3, Figure .four). These side cutters 4 and 5 (FIG. 1, FIG. 2, FIG. 3 and FIG. 4) from the ends of the screw feeder are provided with a first 6 (FIG. 1 and FIG. 2) and, accordingly, a second 7 (FIG. 1 and Figure 2) safety clutches.

These safety couplings can be made, in particular, on the basis of a pin that is cut off when the rated load is exceeded.

On the front side (i.e., in the direction of travel of the snowplow) of the first support gear 2 (Figure 2) and on the front side (i.e., in the direction of movement of the snowplow) of the second support gear 3 (Figure 2) are installed the first 8 (Figure 2) and, accordingly, the second 9 (Figure 2) dividers made in the form of segments, the ends of which are profiled by protrusions (the height of which is from 1 cm).

The helical blades of the left and right half mills 1.1 and 1.2 (FIG. 2) in the abutment zone are equipped with unloading devices 10 (FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5).

Said devices have a U-shaped profile oriented by a horizontal element of the letter P parallel to the axis of the composite center cutter 1 (FIG. 1).

Support wheels 11 (Figure 4) provide snow removal in the "floating" mode, i.e. mode envelope terrain.

Below are examples of the use of the claimed device as part of a snowplow.

Example No. 1

The use of the declared screw feeder of the working body of the snowplow was carried out when performing technological operations for the winter maintenance of airfields. A check of the performance of the screw feeder and a quantitative assessment of its technical characteristics took place during the preparation of the runway for flight operations.

The tests were carried out in the month of February, in conditions of intense snowfall from clouds, at air temperatures from minus 6 to minus 8 ° C and light wind, the speed of which did not exceed 4 m / s.

Snow deposits formed on the runway as a result of snowfall were distributed over its coating in an even layer (the thickness of which did not exceed 50 mm), while the density of freshly fallen snow was 0.15 ... 0.20 g / cm ³ .

For conducting test tests, a snow prism 200 meters long and 4.5 ... 5.0 meters wide, which was parallel to the axial, was prepared at the end section of the runway

runway lines, while along its entire length there are wooden landmarks every 20 meters. And at a distance of 50 meters from the axis of the snowy prism, it is also marked by poles, the boundary of the site, within which studies were carried out to determine the parameters of the distance of the snow mass casting.

The snow prism was constructed using plow snow machines, which, in longitudinal passages, dumped snow deposits with the dumps on the surface, from the center line of the runway to its edge, to the site designated for testing. Then, the snow mass was profiled to the dimensions corresponding to the height of the snow shaft formed on the coating after the plow-brush snow removal machines detached during patrol cleaning of this runway.

During the tests, the following parameters were recorded:

- the time taken by a snow blower for 20 meter sections;

- distance traveled;

- distance casting snow mass;

- snow density in the prism.

To control the parameters, the following registration tools were used:

- wind speed, m / s anemometer AR856A;

- air temperature, deg. With an AR856A anemometer;

- thickness of the surface layer of snow, mm depth gauge GM-1;

- trench wall height in a snow prism, mm ruler

metal in accordance with GOST 427-75;

- the distance traveled by a snowplow, m measuring tape NEDO JSOLAN 50 m;

- the density of snow deposits on the runway, g / cm ³ spring

portable densitometer;

- the density of the snow mass in the prism, g / cm ³ weight densitometer BC-43;

- transit time of a section of a snow prism, with a stopwatch of two arrow type SDS pr-1-2.

The height of the wall formed in the snow prism, the trenches, was measured after the passage of the snow blower every 5 meters on both sides, and then its average value was calculated.

The snow density in the prism was determined by weighing snow samples taken at three points along the height of the trench wall and every 5 meters along the length of the prism section, and then the arithmetic mean value of the density measurements obtained during the test was calculated.

The working body of the snowplow, in which the declared screw feeder was used, was installed on the support of the mounted system of the well-known pneumatic wheel chassis PC1100 "Bora", in its front part.

The diameter of the composite central cutter 1 (Fig. 1) of the screw feeder, as well as the diameter of both side half cutters 4 and 5 (Fig. 4) was 1100 mm, and the width of the working body is 2700 mm.

The support gears 2 and 3 (Figure 1), on which the screw feeder is mounted, are made in the form of bevel gears with a gear ratio i = 6.17 and equipped with hydraulic motors 2.1 and 3.1 (Figure 3) to ensure rotation of the screw feeder.

The end surface of the support gear 2 and 3 (Figure 2) from the front sides are equipped with dividers 8 and 9 (Figure 2).

In the middle part of the composite Central milling cutter 1 (Figure 5), an unloading device 10 (Figure 5) is installed, consisting of the end sections of the helical blades of a U-shaped.

Before testing, the internal combustion engine (ICE) of the pneumatic wheel chassis of the PC1100 Bora was warmed up for 15 minutes. The temperature of the coolant in the internal combustion engine and the oil in the hydraulic systems of its drive was brought to operating values.

When passing through the runway test section during snow removal, the engine fuel supply control was set to the position corresponding to its maximum power.

Snow removal from the snow prism was carried out with the 2nd stage of the transfer gear turned on, which provides the drive mechanism for the movement of the self-propelled pneumatic wheel chassis PC1100 "Bora", and the 2nd range of hydraulic motors for driving the rotation of the screw feeder included. With this combination of drive transmission control and screw feeder drive, the PC1100 Bora pneumatic wheel chassis can reach speeds from 0.2 to 60 km / h by smoothly changing the flow of adjustable pumps of the respective drives.

The gearbox of the drive gear for the evacuation of snow mass was included in the 3rd range, providing a throwing distance of snow mass at a distance of at least 40 meters.

Before the start of the test drive of the snowplow, the hinged system of the working body is moved to the “floating” position, which makes it possible to copy the profile of the runway.

During the comparative tests, the following weather conditions were recorded:

1. Air temperature:

- at 10 hours 00 min minus 8 degrees Celsius;

- at 15 hours 00 minus 5 degrees Celsius.

2. Barometric pressure, mmHg:

- at 10 hours 00 min 742;

- at 15 hours 00 min 737.

3. Wind speed, m / s:

- at 10 hours 00 min 2.0

- at 15 hours 00 min 4.0

In this case, the maximum density of boned snow in the prism was 0.4 g / cm ³ . The test results were recorded by the aforementioned measuring instruments and tools, and then, according to the formula [1], the performance of the snowplow was calculated and the throwing distance was determined by the method described in GTS 23080-78.

where: B - width of the working body, m;

h is the average height of the trench in the snow prism, m;

L is the length of the path traveled per experience, m;

T is the duration of the experiment, s.

The results of the calculation of productivity, performed in accordance with the formula (1), are presented in Table No. 1.

Table 1. No. of arrival Cleaning width Snow depth Distance traveled Time Specific gravity Average casting distance Performance Units rev. m m m sec g / cm ³ m t / h one 2.70 0.45 60 thirty 0.40 35 3500 2 2.70 0.55 80 45 0.35 40 3300 3 2.70 0.50 70 42 0.40 45 3200

The prototype device under the same conditions provided

snow removal capacity of 1,500 t / h.

Therefore, the proposed device confidently ensured the achievement of the claimed technical result.

This result found its explanation, because when visually observing the work of the screw feeder performing the development of snow in the prism, the working body of the snow-removing machine recorded a complete absence of ejection of the removed snow mass onto the prism (and in the prototype device when removing snow deposits, intensive accumulation of part of the snow mass developed by the screw feeder in front of this screw feeder, which is a consequence of the aforementioned discharge).

The achieved results in terms of performance in the proposed device when developing a snow prism is also due to the fact that in the inventive screw feeder, the entrance to the receiving pipe can be located in front of the unloading device 10 (Figure 4), without dimming (unlike the prototype device), and therefore the harvested snow mass does not accumulate at the entrance.

In addition, the unloading device 10 (Figure 2), mounted in the middle of the composite Central mill 1 (Figure 5), intensifies the process of filling the cavity of the device for evacuation of snow mass, so the throughput of the screw feeder increases many times.

In addition, in the process of carrying out the above comparative tests, the stable operation of the internal combustion engine of the Bora RS1100 self-propelled pneumatic wheel chassis was recorded, which indicates the complete absence of significant mechanical resistance periodically to the prototype from moving around the runway cleaned from snow.

Example No. 2.

The use of the declared screw feeder of the working body of the snow-removal machine was carried out during operations to escort a column of aerodrome equipment moving along virgin snow to the place of designated basing.

The tests were carried out in the month of March, with clear weather, temperatures from minus 1 ° С to plus 3 ° С and light wind, the speed of which did not exceed 3 m / s.

Snow cover, along the route of the column, varied in height from 1.1 to 1.3 meters, while the snow density varied from 0.4 to 0.5 g / cm ³ . In some places there was ice on the surface of the snow deposits.

The development of the trench in the snow massif was carried out by the declared screw feeder (mounted on the Bora PC1100 self-propelled pneumatic-wheeled chassis) with the 1st stage of its transfer gearbox turned on. The mentioned transfer gearbox is coupled to the power take-off shaft from the internal combustion engine and provides the drive mechanism for the movement of the self-propelled pneumatic wheel chassis PC1100 "Bora". In addition, with the included 1st range of the hydraulic motor, designed to transmit torque to the first and second support gears 2 and 3 (Figure 4) of the screw feeder, the supply of hydraulic oil through the first and second hydraulic motors allows snow removal of a relatively large height and uneven density.

The gear change box, to drive the device for evacuating the snow mass of the working body, was included in the 2nd range, which implements the peripheral speed of rotation of the impeller, which provides a casting distance of snow mass of up to 30 meters.

Before the test, in each race of the prototype, the control of the hinged system of the working body was transferred to the "floating" position, in which the support wheels 11 (Figure 4) of the working body copy the terrain.

The calculation of technical performance, performed in accordance with the formula {1}, placed in Example No. 1, is presented in Table No. 2.

Table 2. No. of arrival Cleaning width Snow depth Distance traveled Time Specific gravity Average casting distance Performance Units rev. m m m sec g / cm ³ m t / h one 2.70 1,1 80 98 0.40 35 3500 2 2.70 1,2 60 87 0.45 25 3600 3 2.70 1.3 40 66 0.50 twenty 3800

A prototype device under the same conditions ensured a snow removal capacity of 1200 t / h.

Therefore, the proposed device confidently ensured the achievement of the claimed technical result.

During visual and tactile control during snow removal, it was noted that when the direction of movement of the self-propelled pneumatic wheeled chassis of the PC1100 Bora, the force on its steering wheel remains almost unchanged (it is not equipped with a hydraulic booster). This reliably indicates that when maneuvering the Bora, the turning resistance does not increase.

This important result, according to the applicant, is achieved due to the fact that the ends of the helical blades of the side half mills 4 and 5 (Figure 2) of the screw feeder are not burdened, unlike the prototype device, by the side supports, and actively interact with the walls of the trench in the developed snow mass, without causing any significant resistance. The presence of the first 6 and second 7 (Fig. 6 and Fig. 10) safety couplings prevents fatal destruction of the screw feeder during active maneuvering on rough terrain during snow removal, which is an additional factor in increasing productivity by increasing the availability factor. A similar resource for increasing the productivity of the prototype device is limited.

In addition, the reduction of resistance to movement in the snow during the snow removal (also leading to increased productivity) contributes to the presence of two dividers 8 and 9 (Figure 2).

These dividers 8 and 9 (FIG. 2), sporadically vibrating (as well as the screw feeder itself), destroy compacted snow, which remains undeveloped in the interval equal to the distance between the inner ends of the side half mills 4 and 5 (FIG. 3) and the ends of the composite central milling cutters 1 (Fig. 3), thereby contributing to the reduction of dynamic frontal resistance of passive surfaces that occurs during the forward movement of the self-propelled pneumatic wheel chassis PC1100 "Bora".

Example No. 3.

The use of the declared screw feeder of the working body of the snow-removing machine was carried out during the execution of the technological operation to remove the snow-ice roll formed on the road surface.

The tests were carried out in the month of March, with clear weather, air temperature from minus 5 to minus 8 ° degrees Celsius and almost complete absence of wind.

The snow-ice run to be removed is characterized by a high degree of unevenness in height, the value of which varies from 50 to 150 mm, and a large spread in density, varying from 0.55 to 0.70 g / cm ³ , with stony ( in the form of gravel) inclusions.

Before the test, with the joystick for controlling the hydrostatic transmission of the screw feeder of the PC1100 Bora self-propelled pneumatic wheeled chassis, the peripheral cutter speed was set in the range from 4 to 5 m / s, while the transmission units were set to operate at creeping speeds.

Then, with the joystick for controlling the hinged system of the working body, the screw feeder was tilted forward and the rotating cutter and side half-cutters were gently lowered down, thereby providing a depth of 50 mm in the depth of the snow-ice roll.

After that, the self-propelled pneumatic wheeled chassis of the PC1100 Bora began to move at an operating speed of 5-10 km / h, leaving behind a surface cleared of snow and ice.

During the work on this type of snow removal three times, at a distance of 5 km, the screw feeder observed the operation of the safety couplings (two times the second safety clutch 7 (Fig. 3, Fig. 6 and Fig. 10) and once both of these couplings), mounted on the outer ends of the side half mills 4 and 5 (Fig. 4 and Fig. 6). This was due to the fact that the helical blade interacted with an insurmountable (fatal) obstacle, in the form of rocky inclusions frozen into the thickness of the snow-ice roll.

Within 14 minutes, the performance of the snowplow (more precisely, attachments based on the self-propelled pneumatic wheel chassis PC1100 "Bora") was restored. In the event of a similar emergency, the driver stopped the snow truck directly on the snow removal track, turned off the screw feeder drive and replaced the shear pin in the safety clutch 6 and / or 7 (Figure 2 and Figure 10). During forced stops associated with the restoration of the screw feeder, a visual inspection was made of the presence of irreversible deformations in the metal structures of the working body. In all three cases of emergency stop, they were not observed. Therefore, the presence of safety couplings 6 and 7 ((Figure 2 and Figure 10), which are installed on the ends of the side half mills 4 and 5 (Figure 4 and Figure 5), increases the availability of the claimed device (which directly leads to an increase in productivity since the “meeting” of the prototype device with a fatal obstacle in the above snow removal mode (snow-ice reel cleaning) leads to the need to spend at least 15 normal hours on repairing the metalwork of the working body (including repairing the metalwork - screw feeder) in the station shop-stationary.

For the manufacture of the claimed device can be used well-known structural materials, serial components and fasteners, as well as well-proven in municipal engineering hydraulic systems.

Information sources

1. Internet address: www.dormashmoscow.ru Product catalog. Multifunctional machine "MMD-1".

2. Internet address: www.bucherguyer.com Product catalog. Snow Blower BUCHER Rolba 1500. (prototype)

Claims (2)

1. The screw feeder of the working body of the snow blower, characterized by the presence of a composite central cutter (1), formed from the left and right half cutters (1.1) and (1.2), made in the form of helical blades multidirectional relative to each other in the form of a straight helicoid, installed with the possibility of forced rotation on the first (2) and second (3) support gears, while the first side half-cutter (4), made in the form of a single-sided, adjoins the first support gearbox (2) adjacent to the aforementioned composite central mill (1) aligned by winding with the adjacent half cutter (1.1) of the composite central cutter (1) a helical blade in the form of a direct helicoid, connected to the first gear support (2) with the possibility of forced rotation, and adjacent to the second gear support (3) coaxially referred to with a compound central mill (1), a second side half mill (5), made in the form of a unidirectional winding with the adjacent half mill (1.2) of a composite central mill (1) with a helical blade in the form of a direct helicoid connected to the second gear support (3) with opportunity forced rotation, while the outer end of the first side half mill (4) is equipped with a first safety clutch (6), and the outer end of the second side half mill (5) is equipped with a second safety clutch (7), each of the helical blades half cutter (1.1) and ( 1.2) the composite central cutter (1) on the side of the ends adjacent to each other is equipped with an unloading device (10) having a U-shaped profile. 2. The screw feeder of the working body of the snow blower according to claim 1, characterized by the presence of the first (8) and second (9) dividers made in the form of a segment, each of which is rigidly fixed respectively to the front side of the first support gear (2) and the front side the second gear support (3) and is oriented by the end face of the segment in the direction of movement of the snow blower, while the surface of the end faces of the segments of both dividers (8) and (9) is profiled by protrusions.