CN109989380B

CN109989380B - Machine head of snow sweeper and automatic snow sweeper

Info

Publication number: CN109989380B
Application number: CN201811538036.XA
Authority: CN
Inventors: 赵凤丽; 查霞红
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2017-12-29
Filing date: 2018-12-16
Publication date: 2021-07-13
Anticipated expiration: 2038-12-16
Also published as: CN109989380A

Abstract

The invention discloses a machine head of a snow sweeper and an automatic snow sweeper, which comprise a protective plate and an auger, wherein the protective plate forms a working cavity for accommodating the auger, the working cavity is provided with a snow inlet which is opened towards the advancing direction of the snow sweeper, and a snow inlet protective fence which is positioned in front of the auger and is fixed on the protective plate is arranged at the snow inlet. When the snowplow carries out the snowplow operation, the unexpected snow that sneakes into waiting to clear up such as people's trick, pet, debris appear and when being about to get into the condition of screw feeder, the protective fence of entering the snow mouth can be with their separation outside the working chamber, and conscious people will in time withdraw the trick, and the pet also can run out in time, and debris can be pushed open and in time discover to take away by entering the snow mouth protective fence, avoid taking place danger and influence snowplow work.

Description

Machine head of snow sweeper and automatic snow sweeper

Technical Field

The invention relates to automatic snow sweeping equipment, in particular to a machine head of a snow sweeper and the automatic snow sweeper comprising the machine head.

Background

Snow plows are important devices for removing snow in winter. The snow sweeper generally comprises a main machine and a machine head, wherein the main machine is a main body of the snow sweeper and is used for pushing the snow sweeper to advance. The head typically includes a shroud that forms a working chamber and a helical auger that is received within the working chamber to break up the snow mass for ejection.

According to the snow throwing mode, the snow sweeper is further divided into a snow throwing cylinder type snow sweeper and a straight throwing type snow throwing cylinder type snow sweeper, wherein the snow throwing cylinder is installed at the top of a machine head and used for throwing snow scattered by an auger. The straight-throw snow sweeper does not have the snow throwing cylinder, but directly throws scattered snow out of the upper part of a working cavity formed by an auger guard plate along the tangential direction of the circumference.

The snow sweeper is a high-power electric device, an auger of a machine head rotates at a high speed during working, and the auger is easy to be accidentally rolled into no matter an adult, a child, a pet, an object and the like, so that on one hand, danger occurs, and on the other hand, the work of the snow sweeper is also influenced. Especially for automatic snow plows, the snow sweeping process is generally controlled by an intelligent program, so that a coping strategy cannot be timely adopted in case of an accident, and serious consequences are caused. Therefore, the snow sweeper in the prior art has the following defects: people or objects cannot be effectively prevented from being involved in the machine head, so that the people or the objects are easily damaged.

Disclosure of Invention

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide a head of a snow sweeper and an automatic snow sweeper including the same, which effectively prevents a person or an object from being caught in the snow sweeper and causing a danger when the automatic snow sweeper is operated, thereby preventing the snow sweeper from damaging the person or the object. In order to achieve the above object, the present invention adopts the following technical solutions.

The utility model provides a machine head of snowplow, its includes backplate and screw feeder, the backplate forms and holds the working chamber of screw feeder, this working chamber has the orientation snowplow advancing direction open-ended advances the snow mouth department is provided with and is located the place ahead of screw feeder just is fixed in the snow mouth protective fence that advances of backplate.

Preferably, the snow inlet protective fence comprises a plurality of snow inlet protective ribs which are arranged in parallel, and the following relationship exists between the maximum distance W2 between adjacent snow inlet protective ribs and the shortest distance L2 from the snow inlet protective fence to the auger:

when W2 is less than 50mm, L2 is more than or equal to 80 mm;

when the thickness of W2 is more than or equal to 50mm and less than 70mm, L2 is more than or equal to 180 mm;

or

When W2 is less than 38mm, L2 is more than or equal to 80 mm;

when W2 is more than or equal to 38mm, L2 is more than or equal to 557 mm.

Preferably, a first gap exists between the bottom end part of the snow inlet protective fence and the bottom part of the protective plate in the vertical direction, and the height H1 of the first gap in the vertical direction and the shortest distance L1 from the bottom end part of the snow inlet protective fence to the auger in the front-back direction have the following relationship:

when H1 is more than or equal to 0 and less than 34.9mm, L1 is more than or equal to 0;

when the 34.9mm is not more than H1 and is not less than 62.5mm, L1 is not less than (2.15H1+4.9) mm;

when H1 is more than or equal to 62.5mm and less than or equal to 70mm, L1 is more than or equal to 180 mm.

Preferably, the bottom end of the snow inlet protective fence is connected with lower auxiliary protective ribs which extend downwards and are arranged in parallel so as to at least partially shield the first gap in the up-down direction.

Preferably, the following relationship exists between the maximum spacing W1 between the adjacent lower auxiliary protection ribs and the shortest distance L1 from the lower auxiliary protection ribs to the auger in the front-rear direction:

when W1 is less than 50mm, L1 is more than or equal to 80 mm;

when the thickness of W1 is more than or equal to 50mm and less than 70mm, L1 is more than or equal to 180 mm;

or

When W1 is less than 38mm, L1 is more than or equal to 80 mm;

when W1 is more than or equal to 38mm, L1 is more than or equal to 557 mm.

Preferably, a second gap exists between the top end part of the snow inlet protective fence and the top part of the protective plate in the vertical direction, and the height H2 of the second gap in the vertical direction and the shortest distance L3 from the top part of the protective plate to the auger have the following relationship:

when H2 is less than 50mm, L3 is more than or equal to 80 mm;

when H2 is more than or equal to 50mm and less than 70mm, L3 is more than or equal to 180 mm;

or

When H2 is less than 38mm, L3 is more than or equal to 80 mm;

when H2 is more than or equal to 38mm, L3 is more than or equal to 557 mm.

Preferably, the top of aircraft nose still have with the snow throwing section of thick bamboo of working chamber intercommunication, the snow throwing section of thick bamboo is formed with the snow throwing mouth department is provided with and is located the top of screw feeder and be fixed in the snow throwing mouth protective fence of the snow throwing section of thick bamboo.

Preferably, the plane of the snow throwing port protective fence is approximately perpendicular to the snow throwing axis of the snow throwing port of the snow sweeper. .

Preferably, the snow throwing port protection fence comprises a plurality of snow throwing port protection ribs which are arranged in parallel, and the following relationship exists between the maximum distance W3 between every two adjacent snow throwing port protection ribs and the shortest distance L4 from the snow throwing port protection fence to the auger:

when W3 is less than 50mm, L4 is more than or equal to 80 mm;

when the thickness of W3 is more than or equal to 50mm and less than 70mm, L4 is more than or equal to 180 mm;

or

When W3 is less than 38mm, L4 is more than or equal to 80 mm;

when W3 is more than or equal to 38mm, L4 is more than or equal to 557 mm.

An automatic snow sweeper comprises a main machine and a machine head, wherein the main machine drives the machine head to remove snow, and the automatic snow sweeper is characterized in that the machine head of the snow sweeper in any one of the above embodiments.

Preferably, the automatic snow sweeper is a snow thrower or a straight-throw snow sweeper.

By adopting the technical scheme, the invention provides the novel machine head of the snow sweeper and the automatic snow sweeper comprising the machine head, when the snow sweeper is used for sweeping snow, hands and feet of a person, pets, sundries and the like are accidentally mixed with accumulated snow to be cleared and are about to enter the auger, the snow inlet protective fence can be separated outside a working cavity for accommodating the auger, the hands and feet of the conscious person can be timely withdrawn, the pets can also be timely run away, the sundries can be pushed away by the snow inlet protective fence to be timely found and taken away, and the danger and the influence on the snow sweeping work are avoided.

Drawings

FIG. 1 is a side view of one embodiment of a snow sweeper provided in accordance with the present invention, wherein a nose of the snow sweeper is mounted to a host machine of the snow sweeper;

FIG. 2 is a partially enlarged schematic view of a snow throwing gate protective fence of a head of the snow sweeper in FIG. 1;

FIG. 3 is a front view of yet another embodiment of the snow sweeper provided by the present invention, showing the lower auxiliary protective ribs mounted to the bottom of the snow inlet protective barrier;

FIG. 4 is a side view of another snowplow in accordance with the present invention, wherein the head of the snowplow is mounted to the main body of the snowplow;

fig. 5 is a front view of a partial structure of a head of the snow plow of fig. 4.

Description of the reference numerals

10 machine head

20 host

100 guard board

200 screw conveyer

300 snow throwing cylinder

510 entering snow mouthful protective fence

511 inlet protective rib

512 upper fixing rib

513 lower fixing rib

520 protective fence for snow throwing port

600 lower auxiliary protection rib

700 first gap

800 second gap

Height of H1 first gap

Height of H2 second gap

L1 shortest distance from bottom end of snow inlet protective fence to auger in front and back direction

L2 shortest distance from snow inlet protective fence to auger

Shortest distance from top of L3 guard plate to auger

L4 shortest distance from snow throwing port protective fence to auger

Maximum spacing of auxiliary protective ribs under W1

Maximum distance of protective ribs of W2 snow inlet

W3 maximum distance of snow throwing port protection ribs

Detailed Description

To more clearly illustrate the above objects, features and advantages of the present invention, a detailed description of the embodiments of the present invention is provided in this section in conjunction with the accompanying drawings. As the present invention may be embodied in several forms other than the embodiments described in this section, those skilled in the art should appreciate that they may readily use the present invention as a basis for modifying or modifying other embodiments of the present invention without departing from the spirit or scope of the present invention. The protection scope of the present invention should be subject to the claims.

For convenience of description, the "up-down direction" in the present application is defined as a vertical direction, the "left-right direction" is defined as two sides of the traveling direction of the snow sweeper, the "front-back direction" is defined as the forward and backward direction of the snow sweeper, and the "up-down direction" and the "left-right direction" correspond to the directions "up", "down", "left" and "right" in the drawing planes of fig. 1 and 4, respectively.

The first embodiment is as follows:

FIG. 1 is a side view of one embodiment of a snow sweeper provided in accordance with the present invention, wherein a nose of the snow sweeper is mounted to a host machine of the snow sweeper; fig. 2 is a partially enlarged schematic view of a snow throwing port protective fence of a machine head of the snow sweeper in fig. 1.

As shown in fig. 1 and 2, the present invention provides a snow sweeper, which comprises a machine head 10 and a main machine 20, wherein the machine head 10 comprises a guard plate 100, an auger 200 and a snow throwing cylinder 300. The protector plate 100 is formed of a plurality of separate plate bodies to surround the auger 200 above and on the side of the auger 200, thereby forming a working chamber for accommodating the auger 200, which is formed with a snow inlet at the front of the auger 200 (the "front" refers to the advancing direction of the snow sweeper, and is on the left in fig. 1) so as to receive the accumulated snow to be cleaned. The snow throwing cylinder 300 extends arcuately toward the upper side of the head from the apron 100 above the auger 200, and the space within the snow throwing cylinder 300 communicates with the working chamber so that snow from the working chamber can be thrown from the snow throwing cylinder 300.

In this embodiment, the head 10 further comprises a safety fence comprising a snow inlet safety fence 510 fixed to the apron 100 in front of the auger 200, the snow inlet safety fence 510 being located between the snow cover to be cleared and the auger 200, and the plane in which the snow inlet safety fence 510 is located coincides with a vertical plane or is slightly inclined with respect to the vertical plane.

The snow inlet protective barrier 510 can completely block the snow inlet of the auger housed in the working chamber (first case) and can also block the middle part of the snow inlet in the vertical direction leaving a gap above and/or below (second case, as shown in fig. 1). When the snow sweeper is working, the accumulated snow enters the working cavity formed by the guard plate 100 and further enters the auger 200.

In the first case described above, the snow to be cleared will have to enter the auger working chamber through the snow entry safety barrier 510; in the second case, the snow to be cleared can enter the auger working chamber from the lower gap and the snow inlet protective fence 510, and possibly also from the upper gap when there is a particularly high amount of snow.

When the snowplow carries out the snowplow operation, the unexpected snow that sneakes into waiting to clear up such as people's trick, pet, debris and be about to get into the condition of screw feeder 200 appears, into snow mouthful protective fence 510 and can be with their separation outside the working chamber, conscious people will in time withdraw the trick, the pet also can run out in time, and debris can be pushed open and in time discover to take away by entering snow mouthful protective fence 510, avoid taking place danger and influence snowplow work.

The invention aims at the structure of the snow inlet protective fence 510 to protect hands, feet and arms of adults and children.

It should be understood that when auger 200 is operating in a rotating state, auger 200 as a solid of revolution will form a particular surface of revolution that forms the profile of rotation of auger 200, the areas outside of which are safe areas.

In this embodiment (see fig. 3), the snow inlet protection fence 510 has a plurality of snow inlet protection ribs 511 extending substantially in the vertical direction and a plurality of fixing ribs (upper fixing ribs 512 and lower fixing ribs 513) extending substantially in the horizontal direction, the fixing ribs connect the snow inlet protection ribs 511, and the snow inlet protection fence 510 is fixed to the protective plate 100 by the fixing ribs.

The fixing ribs comprise an upper fixing rib 512 and a lower fixing rib 513, the upper fixing rib 512 is connected with each snow inlet protection rib 511 at the upper part of the snow inlet protection fence 510, and the lower fixing rib 513 is connected with each snow inlet protection rib 511 at the lower part of the snow inlet protection fence 510. The snow entry barrier 510 is secured to the fender 100 by upper and lower securing ribs 512,513, such as by welding to the fender 100.

The snow inlet protective ribs 511 are connected by the fixing ribs to form a stable snow inlet protective fence 510, and snow to be cleaned passes through the gap between the adjacent snow inlet protective ribs 511 to enter the working cavity for accommodating the auger 200.

With continued reference to fig. 3, the snow inlet protective ribs 511 are arranged in parallel with each other, and the maximum distance W2 between the snow inlet protective ribs 511 corresponds to the shortest distance from the snow inlet protective fence 510 to the auger 200.

L2 is the minimum value of the distance between the snow entry fence 510 and the position of the auger 200, for example, L2 exists at both ends of the auger 200 for an auger 200 that is large at both ends and small in the middle (i.e., the auger has a larger radial dimension on the left and right sides of the snowplow, and the radial dimension gradually decreases as it travels from the left and right sides toward the middle so that the auger has a smaller radial dimension in the middle in the left-right direction than the radial dimension on the left and right sides thereof). W2 is the maximum value among the pitches of the adjacent snow inlet protective ribs 511 of each group.

In order to prevent the hands, feet, and arms of the child from passing through the snow entrance barrier 510 from the front or from entering the rotational profile of the auger 200 even if they pass through the snow entrance barrier 510, the following correspondence exists between the maximum distance W2 between the snow entrance barrier ribs 511 and the shortest distance L2 from the snow entrance barrier 510 to the auger 200:

when W2 is less than 50mm, L2 is more than or equal to 80mm, so that the palm of an adult can be prevented from entering the snow inlet protective fence 510, and fingers can be prevented from entering the rotating profile of the auger 200 even if the fingers enter the snow inlet protective fence 510;

when the thickness of W2 is more than or equal to 50mm and less than or equal to 70mm, L2 is more than or equal to 180mm, so that fingers, palms and arms of an adult can be prevented from entering the rotating profile of the auger 200 even when the palms of the adult enter the snow inlet protective fence 510, and a more abundant protective space is provided in the aspect of adult protection;

or:

when W2 is less than 38mm, L2 is more than or equal to 80mm, so that the arms of the child can be prevented from entering the snow inlet protective fence 510, and the fingers of the child can be prevented from entering the rotating profile of the auger 200 even if the palm of the child enters the snow inlet protective fence 510;

when W2 is larger than or equal to 38mm, L2 is larger than or equal to 557mm, so that when the arms of the child enter the snow inlet protective fence 510, the fingers, palms and arms of the child can be ensured not to enter the rotating profile of the auger 200, and a more abundant protection space is provided in the aspect of child protection.

In this embodiment, there is a first gap 700 between the bottom end of the snow inlet protection fence 510 and the bottom of the protective plate 100 in the vertical direction, and the snow inlet protection fence 510 does not completely shield the snow inlet in front of the auger 200. Like this, when can obtain better protective effect, still make the snow that waits to clear up can follow this first clearance 700 and directly get into screw feeder 200, further reduced the resistance that the snow received, alleviateed into snow mouthful protective fence 510's weight to save the power of snowplow.

In the present embodiment, the height H1 in the up-down direction of the first gap 700 has a corresponding relationship with the shortest distance L1 in the front-rear direction from the bottom end of the snow inlet protective fence 510 to the auger 200.

In order to prevent the hands, feet and arms of the child from entering the rotation profile of the auger 200 from the bottom, and more particularly, to prevent accidental injury which occurs more frequently at a position obliquely below the auger 200, the height H1 in the up-down direction of the first gap 700 has the following correspondence with the aforementioned shortest distance L1.

When H1 is more than or equal to 0 and less than 34.9mm, L1 is more than or equal to 0, so that the feet of the adult can be prevented from entering the first gap 700, and specifically, the toes of the adult are prevented from passing through the first gap and approaching the auger 200;

when the height of the foot surface of an adult is greater than or equal to 34.9mm and less than or equal to H1 and less than 62.5mm, L1 is greater than or equal to (2.15H1+4.9) mm, so that when a certain position of the foot surface of the adult is clamped in the first gap 700, the shortest distance L1 from the bottom end of the snow inlet protective fence 510 to the front-back direction of the auger 200 exceeds the foot length corresponding to the position, the feet of the adult are prevented from entering the auger 200, meanwhile, the palm of the adult is also ensured not to pass through the first gap 700 to be close to the auger 200, and the danger caused when a worker picks up sundries by hands in the snow sweeping process is avoided;

when H1 is more than or equal to 62.5mm and less than or equal to 70mm, L1 is more than or equal to 180mm, thus, even when the palm root part of a person enters the first gap 700, the shortest distance L1 from the bottom end part of the snow inlet protective fence 510 to the auger 200 in the front-back direction exceeds the length of the palm root part, thereby avoiding fingers from entering the auger 200, simultaneously ensuring that the ankle of an adult is timely clamped at the first gap 700, and the shortest distance L1 from the bottom end part of the snow inlet protective fence 510 to the auger 200 in the front-back direction exceeds the whole length from the ankle to the toe.

In this embodiment (see fig. 1), there is a second gap 800 between the top of the snow inlet protective barrier 510 and the top of the protective plate 100 in the vertical direction, and the snow inlet protective barrier 510 does not completely block the snow inlet in front of the auger 200. Like this, when can obtain better safeguard effect, still make the snow that treats the clearance can directly get into screw feeder 200 from this second clearance 800 when too much, further reduced the resistance that snow received, still alleviateed into snow mouthful protective fence 510's weight to save the power of snowplow.

In the present embodiment, the height H2 in the vertical direction of the second gap 800 corresponds to the shortest distance L3 from the top of the guard plate 100 to the auger 200.

In the case where an object enters the working chamber from a position near the top of the apron 100, the object will likely be intercepted by the top of the apron 100 after a certain amount of entry to reach the entry limit, and therefore, determining the height H2 of the second gap 800 by the shortest distance L3 from the top of the apron 100 to the auger 200 will be advantageous in avoiding accidents caused by the above-mentioned reasons. The height H2 in the up-down direction of the second gap 800 and the shortest distance L3 from the top of the protector plate 100 to the auger 200 have the following correspondence.

When H2 is less than 50mm, L3 is more than or equal to 80mm, so that the palm of the adult can be prevented from entering the second gap 800, and fingers can be prevented from entering the rotating profile of the auger 200 even if the fingers enter the second gap 800;

when the height of H2 is more than or equal to 50mm and less than 70mm, L3 is more than or equal to 180mm, so that fingers, palms and arms of an adult can be prevented from entering the rotating contour of the auger 200 even when the palms of the adult enter the second gap 800, and a more sufficient protection space is provided in the aspect of adult protection;

or

When H2 is less than 38mm, L3 is more than or equal to 80mm, so that the arms of the child can be prevented from entering the second gap 800, and the fingers of the child can be prevented from entering the rotating profile of the auger 200 even if the palm of the child enters the second gap 800;

when H2 is larger than or equal to 38mm, L3 is larger than or equal to 557mm, so that when the arms of the child enter the second gap 800, the fingers, palms and arms of the child can be ensured not to enter the rotating profile of the auger 200, and a more abundant protection space is provided in terms of child protection.

In the present embodiment (refer to fig. 1 and 2), the top of the handpiece 10 has a snow throwing cylinder 300, and the snow throwing cylinder 300 is formed with a snow throwing port. The snow throwing port is provided with a snow throwing port protective fence, the plane where the snow throwing port protective fence is located is coincident with the horizontal plane or slightly inclined relative to the horizontal plane, the accumulated snow processed by the auger 200 passes through the snow throwing port protective fence and is thrown out from the snow throwing port, and the snow throwing port protective fence 520 is provided with a plurality of snow throwing port protective ribs.

Although the snow thrower is located at the top of the handpiece 10, there is still the possibility of accidental entry of adult hands, children's hands, and other objects, and protection is also required. Like this, in this embodiment, snow throwing mouth guard fence can block effectively that the object gets into the working chamber, plays the guard action.

In this embodiment, the snow throwing port protection fence has a plurality of snow throwing port protection ribs, adjacent snow throwing port protection ribs are arranged in parallel, and the maximum distance W3 between the snow throwing port protection ribs and the shortest distance L4 from the snow throwing port protection fence to the auger 200 are determined. The shortest distance L4 from the snow thrower fence to the auger 200 is the vertical distance from the snow thrower fence to the top of the auger 200.

Objects entering the working chamber through the snow thrower are generally subjected to the action of gravity and to the guiding action of the snow thrower 300, with a multiplicity of fall patterns, such as the possibility of falling vertically, the possibility of falling obliquely backwards, etc., among which the object falling vertically enters the rotation profile of the auger 200 at first. Therefore, the corresponding relation exists between the shortest distance L4 from the snow throwing port protective fence to the auger 200 and the maximum distance W3 of each snow throwing port protective rib, and the accident that objects fall from the snow throwing port can be reliably avoided.

The maximum distance W3 between the snow throwing port protection ribs of the snow throwing port protection fence and the shortest distance L4 between the snow throwing port protection fence and the auger 200 have the following corresponding relation.

When W3 is less than 50mm, L4 is more than or equal to 80mm, so that the palm of an adult can be prevented from entering the snow throwing port protective fence, and fingers can be prevented from entering the rotating profile of the auger 200 even if the fingers enter the snow throwing port protective fence;

when the thickness of W3 is more than or equal to 50mm and less than 70mm, L4 is more than or equal to 180mm, so that fingers, palms and arms of an adult can be prevented from entering the rotating profile of the auger 200 even when the palms of the adult enter the snow throwing port protective fence, and a more abundant protective space is provided in the aspect of adult protection;

or

When W3 is less than 38mm, L4 is more than or equal to 80mm, so that the arms of the children can be prevented from entering the snow throwing port protective fence, and the fingers of the children can be prevented from entering the rotating profile of the auger 200 even if the palms of the children enter the snow throwing port protective fence;

when the W3 is larger than or equal to 38mm, the L4 is larger than or equal to 557mm, so that when the arms of the child enter the snow throwing port protection fence, the fingers, palms and arms of the child can be ensured not to enter the rotating profile of the auger 200, and a more abundant protection space is provided in the aspect of child protection.

In other variations of this embodiment, the plane in which the snow thrower fence lies is substantially perpendicular to the snow throwing axis of the snow thrower of the snowplow, which helps to reduce the snow throwing resistance (of course, the angle of the plane in which the snow thrower fence lies does not constitute a limitation of the invention, it may also have other tendencies of extension). The aforementioned shortest distance L4 is the minimum value among the distances from the lowest position of the snow thrower fence to the positions of the auger 200.

In other variations of the above-described embodiments, the snow inlet protective rib may also extend in other directions, such as substantially horizontally, and it is sufficient to match the left fixing rib and the right fixing rib. Alternatively, the snow inlet protective rib may also extend obliquely.

Example two:

fig. 3 is a front view of another embodiment of the snow sweeper provided by the present invention, which shows the bottom of the snow inlet protective barrier fitted with a lower auxiliary protective rib.

In this embodiment, the lower fixing rib 513 is connected to the lower end of each of the snow inlet protection ribs 511, that is, the snow inlet protection ribs 511 are stopped at the lower fixing rib 513, and the lower auxiliary protection rib 600 continues to extend downward from the lower fixing rib 513.

Like this, having add protective structure in the bottom of entering snow mouthful protective barrier 510, lower supplementary protection muscle 600 prevents that adult's hand, foot, children's arm etc. from entering into the working chamber from the position that is close to ground to lower supplementary protection muscle 600 is still favorable to cutting snow from the downward outstanding resistance that fixed muscle 513 down, alleviates snow and receive.

The lower auxiliary protection ribs 600 are arranged in parallel with each other, and the maximum distance W1 between adjacent lower auxiliary protection ribs 600 corresponds to the shortest distance L1 in the front-rear direction from the bottom end of the snow inlet protection fence to the auger 200.

The object entering the working chamber from a position close to the ground generally does not tilt up but approaches the auger 200 obliquely in the horizontal direction or rearward and downward, so that the maximum value W1 of the horizontal spacing between the adjacent lower auxiliary protection ribs 600 and the shortest distance L1 from the bottom end of the snow inlet protection fence to the auger 200 in the forward and rearward direction have the following correspondence relationship, which can avoid accidents caused by the above reasons.

When W1 is less than 50mm, L1 is more than or equal to 80mm, so that the palm of an adult can be prevented from entering the lower auxiliary protective rib 600, and even if fingers enter the lower auxiliary protective rib 600, the fingers can be prevented from extending to enter the rotating profile of the screw conveyor 200;

when the thickness of W1 is more than or equal to 50mm and less than or equal to 70mm, L1 is more than or equal to 180mm, so that fingers, palms and arms of an adult can be ensured not to extend into the rotating profile of the auger 200 even when the palm of the adult enters the working cavity through the lower auxiliary protection rib 600, and a more abundant protection space is provided in the aspect of adult protection;

or

When W1 is less than 38mm, L1 is more than or equal to 80mm, so that the arms of the child can be prevented from entering the lower auxiliary protective ribs 600, and the fingers of the child can be prevented from extending into the rotating profile of the auger 200 even if the palm of the child enters the working cavity through the lower auxiliary protective ribs 600;

when W1 is larger than or equal to 38mm, L1 is larger than or equal to 557mm, so that even if the arms of the child enter the working cavity through the lower auxiliary protection ribs 600, the fingers, palms and arms of the child are not extended into the rotating profile of the auger 200, and a more abundant protection space is provided in terms of child protection.

In the present embodiment, the snow inlet guard rib 511 is integrally formed with the lower auxiliary guard rib 600.

In other variations of this embodiment, the snow inlet protection rib 511 and the lower auxiliary protection rib 600 may be separately disposed according to different protection requirements, so that the respective distances between the snow inlet protection rib 511 and the auxiliary protection rib 600 are different.

Example three:

fig. 4 and 5 show a schematic view of another snow sweeper 10 provided by the invention, the snow sweeper 10 is not provided with a snow throwing cylinder, the accumulated snow treated by the auger is directly thrown from the tangential direction of the rotation direction of the auger, and a snow inlet protective fence with the same structure as the snow sweeper 10 can be adopted.

In this embodiment, there is no gap between the snow inlet protective barrier 510 and the top of the protective plate in the up-down direction, the snow inlet protective barrier extends directly to the top of the protective plate, and there is a gap between the snow inlet protective barrier 510 and the bottom of the protective plate in the up-down direction.

It should be understood that in other variations of the first and second embodiments, there may be upper auxiliary protective ribs extending upwardly from the snow entry protective barrier 510, and in other variations of the third embodiment, there may be lower auxiliary protective ribs extending downwardly from the snow entry protective barrier 510.

In variations of the above embodiments, the snow shed protective barrier 520 may also be formed in other patterns, such as a honeycomb, mesh, etc. shaped protective barrier. The profiled protective barrier can be more effective in protection but is more expensive to manufacture, in contrast to the straight and parallel protective barriers of the various embodiments described above, which have the simplest form of construction and are dimensioned so that a better protection is still obtained. The size of the special-shaped protective fence meets the size requirement of the snow throwing port protective fence of the embodiment. It is understood that other shapes of the protective fence are not limited, and the size is satisfactory.

In variations of the above embodiments, the snow inlet protective barrier 510 may also be formed in other patterns, as long as the dimensions meet the dimensional requirements of the snow inlet protective barrier of the above embodiments.

It should be understood that the above embodiments can be combined to protect different objects, especially hands and feet of adults, arms of children and the like, which are prone to serious accidents, in a targeted manner, and can obtain different protection effects without departing from the spirit of the invention.

It should also be understood that the "protective fence" referred to herein is a frame-shaped structure with a closed periphery, and has an upper fixing rib and a lower fixing rib, and the distance between the upper fixing rib and the lower fixing rib should not be understood as the distance between the protective ribs, i.e. not limited by the above-mentioned W1, W2, W3. However, the frame structure may have a fixing structure extending from the frame body thereof so as to be fixed to the protector plate 100 of the head 10, the snow throwing port, etc., and the fixing structure may be formed integrally with or separately from the members in the frame structure, or may have an auxiliary protection structure extending from the frame body thereof, such as a lower auxiliary protection rib.

For example, the upper fixing rib 512 and the lower fixing rib 513 in the first embodiment may have an additional portion extending from the frame structure to be fixed to the protection panel 100, and the additional portion should be understood as the above-mentioned fixing structure, and not as the protection fence itself. Similarly, the above-mentioned upper and lower auxiliary protection ribs 600 should be understood as the above-mentioned auxiliary protection structure rather than the protection fence itself.

The above embodiments may be arbitrarily combined within a range not departing from the spirit of the present invention. For the sake of brevity, some parts are omitted from the description, however, it should be understood that the parts can be implemented by the prior art.

Claims

1. A machine head of a snow sweeper comprises a guard plate and an auger, wherein a working cavity for accommodating the auger is formed in the guard plate, and the working cavity is provided with a snow inlet which is opened towards the advancing direction of the snow sweeper; a second gap exists between the top end part of the snow inlet protective fence and the top part of the protective plate in the vertical direction, and the height H2 of the second gap in the vertical direction and the shortest distance L3 from the top part of the protective plate to the auger have the following relationship:

when H2 is less than 50mm, L3 is more than or equal to 80 mm;

or

When H2 is less than 38mm, L3 is more than or equal to 80 mm;

when H2 is more than or equal to 38mm, L3 is more than or equal to 557 mm.

2. The head of a snow sweeper according to claim 1, wherein the snow inlet protective barrier comprises a plurality of snow inlet protective ribs arranged in parallel, and a maximum distance W2 between adjacent snow inlet protective ribs and a shortest distance L2 from the snow inlet protective barrier to the auger are in a relationship:

when W2 is less than 50mm, L2 is more than or equal to 80 mm;

or

When W2 is less than 38mm, L2 is more than or equal to 80 mm;

when W2 is more than or equal to 38mm, L2 is more than or equal to 557 mm.

3. The head of a snow sweeper according to claim 1 or 2, wherein a first gap exists between the bottom end of the snow inlet protective fence and the bottom of the fender in the up-down direction, and a height H1 of the first gap in the up-down direction and a shortest distance L1 from the bottom end of the snow inlet protective fence to the auger in the front-back direction have a relationship:

4. The head end of a snow sweeper according to claim 3, wherein the bottom end of the snow inlet protective fence is connected with lower auxiliary protective ribs extending downward and arranged in parallel to at least partially shield the first gap in an up-down direction.

5. The head of a snow sweeper according to claim 4, wherein the following relationship exists between the maximum distance W1 between the adjacent lower auxiliary protective ribs and the shortest distance L1 from the lower auxiliary protective ribs to the auger in the front-rear direction:

when W1 is less than 50mm, L1 is more than or equal to 80 mm;

or

When W1 is less than 38mm, L1 is more than or equal to 80 mm;

when W1 is more than or equal to 38mm, L1 is more than or equal to 557 mm.

6. The machine head of the snow sweeper according to claim 1 or 2, wherein a snow throwing cylinder communicated with the working cavity is further arranged at the top of the machine head, a snow throwing port is formed on the snow throwing cylinder, and a snow throwing port protective fence which is positioned above the auger and fixed to the snow throwing cylinder is arranged at the snow throwing port.

7. The head end of a snow sweeper of claim 6, wherein the snow throwing port fence lies in a plane substantially perpendicular to a snow throwing axis of the snow throwing cylinder.

8. The machine head of a snow sweeper according to claim 7, wherein the snow throwing port protection fence comprises a plurality of snow throwing port protection ribs arranged in parallel, and the maximum distance W3 between each two adjacent snow throwing port protection ribs and the shortest distance L4 from the snow throwing port protection fence to the auger are in the following relationship:

when W3 is less than 50mm, L4 is more than or equal to 80 mm;

or

When W3 is less than 38mm, L4 is more than or equal to 80 mm;

when W3 is more than or equal to 38mm, L4 is more than or equal to 557 mm.

9. An automatic snow sweeper, which comprises a main machine and a machine head, wherein the main machine drives the machine head to remove snow, and the machine head is the machine head of the snow sweeper disclosed by any one of claims 1 to 8.

10. An automatic snow sweeper according to claim 9, wherein the automatic snow sweeper is a snow thrower or a straight snow sweeper.