CN201470441U - Gardening pulverizer - Google Patents

Abstract

A gardening pulverizer comprises a main body with a peripheral sidewall; a shoe plate is arranged in the main body; a garbage receiving space is arranged on top of the shoe plate; a dust emission space is arranged under the separator; a cutting mechanism for pulverizing garbage is arranged in the receiving space; a motor for driving the cutting mechanism is disposed under the shoe plate; a duct for cooling the motor comprises an air inlet and an air outlet; the duct, the receiving space and the dust emission space are isolated; and the motor cooling duct is arranged to effectively improve the working environment full of dusts and effectively guarantee the cooling effect for the motor and prolong the service life of the motor.

Description

Garden crusher

Technical field

The utility model relates to a kind of garden tool set, especially a kind of pulverizer of handling rubbish such as leaf.

Background technology

Traditional garden crusher generally includes frame, be arranged at the head of frame, the motor that is provided with cutter in the head and drives the cutter rotation, the high-speed motion of cutter can carry out cutting and grinding to rubbish such as leaf or careless bars, the frame upside is provided with charging basket, be used to the rubbish to be pulverized of packing into, the top of charging basket has the material guiding hopper that rubbish is imported charging basket, rubbish to be pulverized is imported into charging basket from material guiding hopper, after the cutter cutting and grinding of head, be discharged from from the discharging opening of the downside of frame, also be provided with refuse bag or dustbin near the discharging opening and be used for the rubbish chip after pulverizing is collected.

United States Patent (USP) bulletin 4682740 has disclosed a kind of garden crusher, the motor that wherein is used to drive the head rotation is contained in the downside of frame, frame is provided with the passage that is used for cooling motor, this passage has an air inlet that is positioned at the frame outside, because motor drive shaft is provided with built-in fan blade, therefore when rotating at a high speed under the driving of head at motor, clean air just is inhaled into this passage from the air inlet in the frame outside, air-flow when the motor with its commutator, fixed, the heat at positions such as rotor is taken away, behind the airflow passes fan blade, the rubbish after pulverizing is blown in dust bag or the dust collecting container.Because the dirt bits after air-out behind the cooling motor and the pulverizing are mixed in together, make dirt bits particle under the air-out effect, be easy to overflow to the outside of dust bag or dust collecting container, thereby be full of dust near making dust bag or dust collecting container, and the health of working for a long time for the operator is totally unfavorable in such working environment; And when air-out directly enters dust bag, a bag interior gas pressure is improved, increase and wind resistance, thereby can have influence on the effect that cools of machine cooling air channel, the life-span of motor also can be affected.

The utility model content

At the deficiencies in the prior art, the utility model improves, and provides a kind of and can effectively improve working environment, and can guarantee the motor cooling effect, effectively prolongs the garden crusher of motor life.

The technical scheme that its technical problem that solves the utility model adopts is such: a kind of garden crusher comprises the main body with peripheral sidewall, be provided with gripper shoe in the described main body, the top of described dividing plate is provided with the rubbish receiving space, the below of described gripper shoe is provided with the dust discharge space, the cutting mechanism that is used to grind up the refuse is arranged at described receiving space, the motor that is used to drive described cutting mechanism is arranged at the gripper shoe below, and the air channel that is used for cooling motor, described air channel comprises an air inlet and an air outlet at least, and described air channel and described receiving space and dust discharge space are isolated.

The outer periphery of described motor is equipped with motor shell, the common path that forms the air channel of described cooling motor of described motor shell and gripper shoe; Described motor has motor drive shaft, has connected fan blade on the described motor drive shaft.The air inlet in described air channel and air outlet are arranged at respectively on the peripheral sidewall of main body; Described air inlet and air outlet are positioned at the sustained height position of main body peripheral sidewall.

In a kind of embodiment, described gripper shoe radially is provided with along main body, and described motor shell radially extends to main body along gripper shoe and links to each other, and described air inlet and air outlet are oppositely arranged on the main body peripheral sidewall.

In the another kind of embodiment, described gripper shoe is V-shaped setting in main body, and described motor shell extends to main body along the gripper shoe direction and links to each other, and the line between line between described air inlet and the motor axis and air outlet and the motor axis is the angle setting.

In the another kind of embodiment, being provided with in the described main body can be around main center's axis dividing plate rotatably, and described gripper shoe is fixed in the downside of described dividing plate; Described dividing plate is provided with perforate, and described perforate is used to discharge the rubbish after cutting mechanism is pulverized; Described dividing plate is provided with handle, is used for making the relative main body rotation of dividing plate for the operator.

In the another kind of embodiment, described gripper shoe fixedly is coupled in the main body, described gripper shoe comprises perforate and closed area, described perforate is used to discharge the rubbish after cutting mechanism is pulverized, described motor is arranged at the downside of closed area, the common path that forms the air channel of described cooling motor of described closed area and motor shell.

Detachable is connected between described main body and the bracket component, and dust bag is connected in described bracket component releasedly; Detachable is connected between described feed containers and the main body, and described feed containers further comprises a material guide device, and described material guide device has upper shed and under shed, and described upper shed diameter is greater than under shed; Described bracket component comprises many supporting legs, and described supporting leg comprises upper support portion and lower support portion, the detachable connection between described upper support portion and the lower support portion.

Compared with prior art, the beneficial effects of the utility model: the air channel of cooling motor and rubbish receiving space and dust discharge space are isolated, solved owing to air-out is blown into the spray dirt phenomenon that dust bag causes from root, improved working environment greatly, ensured operator's health; Simultaneously because air-out directly is blown into atmosphere, and traditionally air-out is blown into dust bag and compares, reduced and wind resistance, the cooling air flows more smooth and easy in the air channel, thereby has promoted the heat dispersion of machine; The air of cleaning enters from the air channel air inlet that is independent of rubbish receiving space and outside, dust discharge space, can not cause that motor stops up, thereby can lengthen the life of a machine effectively

Description of drawings

Below in conjunction with drawings and Examples the utility model is carried out concrete elaboration.

Fig. 1 is the schematic diagram of the utility model garden crusher master apparent direction.

Fig. 2 is the cutaway view along A1-A1 among Fig. 1.

Fig. 3 is the partial sectional view along B1-B1 among Fig. 2.

Fig. 3 A is the partial enlarged drawing of Fig. 3.

Fig. 4 is the partial sectional view along C1-C1 among Fig. 3, has illustrated first kind of embodiment of the utility model motor cooling air duct construction.

Fig. 5 is the partial sectional view along C1-C1 among Fig. 3, has illustrated second kind of embodiment of the utility model motor cooling air duct construction.

Fig. 6 is the cutaway view along A1-A1 among Fig. 1, has illustrated the third embodiment of the utility model motor cooling air duct construction.

Fig. 7 is the partial sectional view along B2-B2 among Fig. 6.

Fig. 8 A is the partial enlarged drawing of mark I among Fig. 3.

Fig. 8 B is the cross-sectional schematic along D1-D1 among Fig. 3

Fig. 9 is the partial enlarged drawing along mark II among Fig. 3.

Figure 10 is the material guiding hopper of the utility model garden crusher and the syndeton schematic diagram of charging basket.

Wherein:

1-main body 6-elastic component 15-slope 26-opening

1a-peripheral sidewall 7-elastic component 16-support bar 28-space

2,2 ', 4 '-gripper shoe 8-band 17-fan blade 30-closed area

3-charging basket 9-gripper shoe 18-perforate E1-receiving space

3a-upper shed 9a-draw-in groove 20-bracket component E2-dust discharge space

The 3b-under shed 10-motor 21-first support ring R1, the R2-direction of rotation

The 3c-support ring 10a-motor shell 22-second support ring S, S ', S "-cooling air channel

4-dividing plate 10b-motor drive shaft 23-supporting leg α-angle

4a-handle 11-line of cut 23a, on the 23b-, X1-main center of lower support portion axis

5-material guiding hopper 12-dust bag 24-elastic collar X2-motor axis

The big opening 13 of 5a-, 13 '-air inlet 25-triggers part

The little opening 14 of 5b-, 14 '-air outlet 25a-bayonet lock

The specific embodiment

As shown in Figure 1 to Figure 3, be a kind of with leaf, the pulverizer that garden foreign material rubbish such as grass bar carry out cutting and grinding, it comprises the main body 1 that is provided with peripheral sidewall 1a, the bracket component 20 that is used for supportive body 1, and the charging basket 3 and the material guiding hopper 5 that are coupled to main body 1 top, wherein charging basket 3 is used for splendid attire and treats comminution of material, and material guiding hopper 5 is used for importing and treats comminution of material, wherein the cavity interior span that surrounded of main body 1 peripheral sidewall 1a is provided with a rectangle gripper shoe 2 of radially extending, these gripper shoe 2 downsides have fixedly connected a drive unit, drive unit is a motor 10 in the present embodiment, motor 10 is provided with motor drive shaft 10b, connected fan blade 17 on the motor drive shaft 10b, rotatablely moving of motor 10 is passed to output shaft by travelling gear, and cutting mechanism is set on the output shaft, cutting mechanism utilization in the present embodiment be line of cut 11, this line of cut 11 can be made by nylon or carbon fibre material, and certainly, the line of cut 11 in the present embodiment also can be with substituting such as plastics or metal blade.

With reference to Fig. 1, shown in Figure 2, in the cavity that the peripheral sidewall 1a of main body 1 is surrounded, the top of next-door neighbour's gripper shoe 2 is provided with one can be around main center's axis X 1 toroidal membrane 4 rotatably, peripheral sidewall cavity that 1a surrounds is separated into, following two parts, promptly be positioned at the rubbish receiving space E1 on dividing plate 4 or gripper shoe 2 tops and be positioned at dividing plate 4 or the dust discharge space E 2 of gripper shoe 2 bottoms, line of cut 11 is arranged in top receiving space E1, offer a plurality of round holes 18 and other erose perforate 18 on the dividing plate 4 radially symmetrically, make the leaf that enters charging basket 3 from material guiding hopper 5 after line of cut 11 cutting and grinding become tiny rubbish, from described different perforate 18, spill, be supported in the dust bag 12 of bracket component 20 by income at last.Dividing plate 4 is provided with the handle 4a that extends main body peripheral sidewall 1a, and this handle 4a supplies the operator respectively along R1 among Fig. 2, clockwise shown in the R2 arrow, counter clockwise direction rotary manipulation dividing plate 4; When being rotated to certain angle position, dividing plate 4 can position; Dividing plate 4 is in the process of rotation, being arranged at perforate 18 areas of dividing plate 4 and the surface of gripper shoe 2 is changing at crossover, have only when the perforated area of dividing plate 4 and gripper shoe 2 stagger, the rubbish after cutting and grinding could enter dust discharge space E 2 through perforate 18, finally is discharged in the dust bag 12; If the crossover area of the perforated area of dividing plate 4 and gripper shoe 2 is big more, the perforated area that can spill for grinding up the refuse is just more little, the speed that rubbish is discharged is slow more, when the crossover area of the perforated area of dividing plate 4 and gripper shoe 2 more little, can be big more for the perforated area that grinds up the refuse of discharging, the speed that rubbish is discharged is also fast more.When the rubbish speed of discharging from perforate 18 is slack-off, treat that from what charging basket 3 entered the time that comminution of material is trapped in the receiving space E1 is longer relatively, line of cut 11 is just had an opportunity to its cutting and grinding once more, and the rubbish of discharging from perforate 18 can be meticulousr like this.

With reference to shown in Figure 3, motor 10 is fixedly connected on the downside of gripper shoe 2, motor 10 outer periphery are equipped with motor shell 10a, motor shell 10a is connected with main body 1 peripheral sidewall 1a along the extension of gripper shoe 2 radial direction, thereby form one at main body 1 position and surround an inner space that is used to surround motor 10 and fan blade 17 jointly by motor shell 10a and gripper shoe 2, extend until peripheral sidewall 1a always this inner space, and in last at least one air intake 13 that enters for the exterior clean air that forms of peripheral sidewall 1a, and at least one air outlet 14 of going out of air feed transpiration, like this, under the running up of motor 10, drive fan blade 17 rotations, form an air channel S who is used for cooling motor 10 in this inner space; Air inlet 13 in the present embodiment lays respectively at air outlet 14 that main body 1 peripheral sidewall 1a goes up and it is in sustained height substantially in main body 1 upper installing; Among the figure the indicated direction of arrow by cooling motor 10 air-flows in the S of air channel the path of process; Be the rotation of the high speed rotation drive fan blade 17 of motor 10, outside cold air enters from air inlet 13, during through motor 10, motor 10 is taken away because of the heat that the high speed rotation produces, and the hot-air that has motor 10 temperature is through air outlet 14 discharges; This air channel S can help motor 10 to dispel the heat effectively, thus the working life that can prolong motor 10.Because this cooling air channel S is formed at the downside of rectangle gripper shoe 2, and it is isolated with the rubbish receiving space E1 on top with the dust discharge space E 2 that is positioned at dividing plate 4 bottoms, therefore the air-flow that has heat of discharging from main body peripheral sidewall 1b air outlet 14 grinds up the refuse with the quilt of discharging from dividing plate perforate 18 and can not produce interference, promptly can not cause dust four ease, what also can not have influence on dividing plate 4 goes out dirt speed.Those skilled in the art it is contemplated that perforate 18 shapes of dividing plate 4 and the setting of perforated area are determined by accurate calculating and test back according to factors such as motor rotary speeds.

With reference to shown in Figure 4, it is a kind of preferred implementation in cooling motor 10 air channels of the utility model garden crusher, rectangle gripper shoe 2 is radially striden and is located in the main body, the air inlet 13 of cooling air channel S and air outlet 14 lay respectively at the relative both sides of main body 1 peripheral sidewall 1a, it is the side that air inlet 13 is positioned at main body 1, air outlet 14 then is positioned at the relative opposite side of main body and air inlet 13, and air inlet 13 almost is in same linear position with air outlet 14.

With reference to shown in Figure 5, it is the another kind of preferred implementation in cooling motor 10 air channels of the utility model garden crusher, dividing plate is not set in the main body, only be provided for supporting the gripper shoe 2 ' of motor 10, rubbish after cutting mechanism is pulverized is 28 discharges from the space between gripper shoe both sides and the main body peripheral wall 1a, gripper shoe 2 ' is roughly V-shaped in body interior, its two ends radially extend to main body peripheral wall 1a along main body respectively and are connected, the motor shell (not shown) of coating motor 10 and fan blade 17 and the bearing of trend of gripper shoe 2 ' are consistent, and form the path of the air channel S ' of cooling motor 10 in main body 1 position, among the figure the indicated direction of arrow by the interior air-flow of air channel S ' the path of process; This moment air inlet 13 ' in the position of main body 1 peripheral sidewall 1a and air outlet 14 ' in the position of main body 1 peripheral sidewall 1a non-over against, but be provided with at an angle, be the line between air inlet 13 ' and the motor drive shaft 10b, and the line between air outlet 14 ' and the motor drive shaft 10b have angle α.

Certainly, those skilled in the art it is also contemplated that the different parts that air channel S air inlet 13 and air outlet 14 is arranged at main body peripheral sidewall 1a, also air inlet 13 and air outlet 14 can be arranged at the differing heights position of main body 1, relative angle between air inlet 13 and the air outlet 14 can be acute angle, the right angle, perhaps obtuse angle, perhaps air inlet 13 and air outlet 14 are provided with and are positioned at main body 1 the same side but are positioned at differing heights, as long as can make from air outlet 14,14 ' the air-flow of discharging does not participate in the discharging that grinds up the refuse, with regard to unlikely formation dust atmosphere and the collection that influences rubbish.

With reference to Fig. 6, shown in Figure 7, it is the third embodiment in cooling motor 10 air channels of the utility model garden crusher, gripper shoe 2 is set no longer separately among this embodiment, be made as relative main body and fixedly install but will the dividing plate of main body 1 rotary setting relatively change, the dividing plate of this moment is the gripper shoe 4 ' with dust discharge function and motor support function, be that gripper shoe 4 ' comprises perforate 18 ', the big I of this perforate is calculated in advance, and the closed area 30 that is used to support motor 10, see the zone that two dotted lines are enclosed among Fig. 6 for details, this closed area 30 preferentially is arranged at the central authorities of gripper shoe 4 ' and along main body 1 radial arrangement, perforate 18 is evenly arranged in the both sides of closed area 30; Motor 10 fixedly is coupled to the bottom of closed area 30, motor shell 10a extends to main body 1 along this radial-sealing zone 30 and is connected, closed area 30 and motor shell 10a have surrounded the inner space of a closed motor 10 and fan blade 17 equally, extend until peripheral sidewall 1a always this inner space, form an air channel S who is used for cooling motor 10 "; and go up to form the air inlet 13 that enters for the exterior clean air in peripheral sidewall 1a, and the air outlet 14 that goes out of air feed transpiration.

With further reference to shown in Figure 3, bracket component 20 comprises first support ring 21, and many supporting legs 23 that are positioned at first support ring, 21 bottoms, for supportive body 1 reposefully and the equipment such as charging basket 3, material guiding hopper 5 that is coupled to its top, the quantity of the supporting leg 23 in this example is provided with three, and is provided with one in the middle part of supporting leg and is used to reinforce second support ring 22 of support.Wherein connect a shirt rim shape gripper shoe 9 on first support ring 21, this gripper shoe 9 is provided with draw-in groove 9a, and the bottom of the peripheral sidewall 1a of main body 1 is connected in this draw-in groove 9a; Certainly this gripper shoe 9 can directly be located at main body 1, and is perhaps integrally formed with main body 1, when pulverizer is not worked, main body 1 can be stored after bracket component 20 dismountings, to save collection space.In addition, be arranged with dust bag 12 on first support ring 21, be used to collect and be cut line 11 cutting and grinding after dividing plate 4 openings 18 enter the rubbish in dust discharge space, behind the full rubbish of collection, dust bag 12 can discharge from support ring 21.

Shown in Fig. 8 A, 8B, bracket component 20 1 ends are supported in work ground, the other end is supporting leaf shattering machine main body 1, wherein supporting leg 23 is a pipe structure, and it comprises and patch 23a of upper support portion and the 23b of lower support portion that connects mutually that wherein the 23b of lower support portion forms diameter in match around the boundary line and receives little body, be plugged in the body of the 23a of upper support portion, lower support 23b body inside is provided with an elastic collar 24, and a bayonet lock 25a is set on the elastic collar 24, and the bayonet lock 25a outside connects triggers part 25; Under the normal operating conditions, bayonet lock 25 inserts one and is arranged in the body opening 26 of the 23a of upper support portion under the active force of elastic collar 24, upper and lower support portion 23a, and 23b locks together by elastic collar 24 and bayonet lock 25a.After crushed work finishes, if desired, the 23b of lower support portion of supporting leg 23 can be dismantled from the 23a of upper support portion, as long as the operator applies an active force in triggering on the part 25, its elastic force that overcomes elastic collar 24 is pressed in the body opening 26 of the 23a of upper support portion, and like this, the 23b of lower support portion just can transfer to from the body of the 23a of upper support portion, thereby can reduce collection, the packaging volume of bracket component 20, and installation and removal work is quick and easy.

With reference to Fig. 1, Fig. 3, shown in Figure 10, charging basket 3 is made up of for example canvas, leather and other flexibility, folding flexible material with material guiding hopper 5; Wherein charging basket 3 is a cylindrical body, and it has upper shed 3a, under shed 3b, and material guiding hopper 5 is a bullet, and it has superposed big opening 5a, and is positioned at the little opening 5b of bottom; Wherein the little opening 5b of material guiding hopper 5 stretches among the upper shed 3a of charging basket 3 and towards the cylindrical body of material guiding hopper 3 is inner and extends, the peripheral wall that is material guiding hopper 5 forms one section slope 15 in charging basket 5, this slope 15 can stop treating in the charging basket 3 to grind up the refuse along the charging basket wall upwards from material guiding hopper 5 effusions.Charging basket 3 is provided with the elastic component 6 that stretches along its peripheral wall spirality, material guiding hopper 5 is provided with the elastic component 7 that stretches along its peripheral wall spirality, what the flexible material in the present embodiment adopted is canvas, elastic component 6,7 is paid the utmost attention to the employing spring, and forms elastic support ring respectively in upper and lower opening 5a, 5b position near upper and lower opening 3a, 3b position and the material guiding hopper 5 of charging basket 3; In addition, be provided with the effect that the support bar 16 (with reference to Fig. 1) that is positioned at the material guiding hopper and the charging basket outside has been used for supplemental support between material guiding hopper 5 upper shed 5a and the charging basket under shed 5b, support bar 16 can adopt modes such as band 8 to be connected with guide 5, it is two to three that the quantity setting of support bar 16 is paid the utmost attention to, and the quantity setting can change as required certainly; In normal operation, the support force of the elastic force of spring 6,7 and support bar 16 should be enough to make material guiding hopper 5 and charging basket 3 all can keep its full state; Can adopt suture to connect between material guiding hopper 5 and the charging basket 3 or adopt different connected modes such as band; The elastic force setting of its medi-spring 6,7 is to design according to the actual requirements, and it can satisfy cutting mechanism 11 in pulverizing cutting process, and material guiding hopper 5 can bear the pressure that is produced by the weight of rubbish such as leaf, careless bar with charging basket 3, and is unlikely to distortion.

With reference to shown in Figure 9, the support ring 3c that the under shed 3b place of charging basket 3 forms is overlapped in the upper end of main body 1 peripheral wall 1a, to such an extent as to the inner chamber of under shed 3b and main body 1 directly connects; Down, the rubbish that enters from material guiding hopper 5 is imported into the charging basket 3 in working order, is pulverized by the cutting mechanism 11 in the main body 1, and the opening from dividing plate 4 spills then, is taken in the dust bag 12.Consider rubbish to be pulverized to have rain and dew and have certain humidity, it is pasted on the inwall of charging basket 3 and material guiding hopper 5 easily, therefore the charging basket 3 in the present embodiment and the inwall of material guiding hopper 5 can adopt water-repellent paint to handle, or adopt waterproof materials to make.Work as end-of-job, when needing the collection pulverizer, dismantle lower support bar 16 earlier, again charging basket 3 is disassembled together with the peripheral wall 1a of material guiding hopper 5 from main body 1, it is folding along the extension direction of coil spring 6,7 it to be compressed the back in the other direction then, and ties up with strap or jag, and pulverizer main body 1 volume that sheds like this behind charging basket 3 and the material guiding hopper 5 has reduced greatly, thereby reduced the collection volume of pulverizer, the operator can no longer worry for the parking space of pulverizer.

Claims (10)

1. garden crusher, comprise the have peripheral sidewall main body (1) of (1a), be provided with gripper shoe (2 in the described main body, 2 ', 4 '), the top of described gripper shoe is provided with rubbish receiving space (E 1), and the below of described dividing plate is provided with dust discharge space (E2), and the cutting mechanism that is used to grind up the refuse (11) is arranged at described receiving space, the motor (10) that is used to drive described cutting mechanism is arranged at the gripper shoe below, and the air channel (S, S ', S ") that is used for cooling motor; described air channel comprises an air inlet (13; 13 ') and an air outlet (14,14 ') at least, it is characterized in that: described air channel and described receiving space and dust discharge space are isolated.

2. garden crusher according to claim 1 is characterized in that: the outer periphery of described motor is equipped with motor shell (10a), the common path that forms the air channel of described cooling motor of described motor shell and gripper shoe.

3. garden crusher according to claim 2 is characterized in that: described motor has motor drive shaft (10b), has connected fan blade (17) on the described motor drive shaft.

4. garden crusher according to claim 3 is characterized in that: air inlet in described air channel (13,13 ') and air outlet (14,14 ') are arranged at respectively on the peripheral sidewall (1a) of main body.

5. garden crusher according to claim 4 is characterized in that: described air inlet (13,13 ') and air outlet (14,14 ') are positioned at the sustained height position of main body peripheral sidewall (1a).

6. garden crusher according to claim 5, it is characterized in that: described gripper shoe (2) radially is provided with along main body, described motor shell (10a) radially extends to main body (1) along gripper shoe and links to each other, and described air inlet (13) radially is oppositely arranged in main body peripheral sidewall (1a) with air outlet (14).

7. garden crusher according to claim 5, it is characterized in that: described gripper shoe (2 ') is V-shaped setting in main body, described motor shell (10a) extends to main body (1) along the gripper shoe direction and links to each other, and the line between line between described air inlet (13 ') and the motor axis (X2) and air outlet (14 ') and the motor axis (X2) is angle (α) setting.

8. garden crusher according to claim 5 is characterized in that: setting can be around the dividing plate (4) of main center's axis (X1) rotation in the described main body, and described gripper shoe (2,2 ') fixedly is coupled to the downside of described dividing plate.

9. garden crusher according to claim 8 is characterized in that: described dividing plate (4) is provided with perforate (18), and described perforate is used to discharge the rubbish after cutting mechanism is pulverized.

10. garden crusher according to claim 5, it is characterized in that: described gripper shoe (4 ') comprises perforate (18,) and closed area (30), described perforate is used to discharge the rubbish after cutting mechanism is pulverized, the common path that forms the air channel of described cooling motor of described closed area and motor shell.

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