CN215223147U

CN215223147U - Brush cutter

Info

Publication number: CN215223147U
Application number: CN202121789912.3U
Authority: CN
Inventors: 黄婉莹
Original assignee: Zhejiang Qionghuai Ancient And Famous Tree Maintenance Co ltd
Current assignee: Zhejiang Qionghuai Ancient And Famous Tree Maintenance Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2021-12-21
Anticipated expiration: 2031-08-03

Abstract

The utility model relates to the technical field of agricultural machinery, especially, relate to a brush cutter. Including spinning blade (1), blade actuating mechanism (2), protection machanism (3), supporting rod (4), handrail (5) and power unit (6), blade actuating mechanism (2) are including casing (7), connecting axle and motor (15), casing (7) and bracing piece intercommunication, connecting axle and motor (15) all set up in casing (7), power unit (6) are the group battery, the group battery is connected with motor (15) electricity, motor (15) output shaft is connected with connecting axle one end, just the connecting axle other end is connected its characterized in that with spinning blade (1): the connecting shaft is provided with an extending part (14) on the circumference, the extending part (14) is uniformly provided with a plurality of inclined through holes (18) along the circumference, the supporting rod is provided with an air inlet (16), and the shell (7) is provided with an air outlet (17). The brush cutter has good heat dissipation and long service life.

Description

Brush cutter

Technical Field

The utility model relates to the technical field of agricultural machinery, especially, relate to a brush cutter.

Background

The brush cutter is also called as a backpack mower, can be carried on the back and carried by hands, and is mainly used for sweeping edges of large-area lawns or trimming hay shrubs. Due to its dexterity and portability, brush cutters are widely used for trimming lawns and shrubs.

The brush cutter comprises a rotary blade, a blade driving mechanism, a protection mechanism, a supporting rod, a handrail and a power mechanism, wherein the blade driving mechanism mainly comprises a connecting shaft and a motor, and the power mechanism is mainly a battery.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the brush cutter has good heat dissipation performance and long service life.

The utility model adopts the technical proposal that: the utility model provides a brush cutter, includes spinning blade, blade actuating mechanism, protection machanism, supporting rod, handrail and power unit, blade actuating mechanism includes casing, connecting axle and motor, casing and supporting rod intercommunication, connecting axle and motor all set up in the casing, power unit is the group battery, the group battery is connected with the motor electricity, motor output shaft is connected with connecting axle one end, just the connecting axle other end is connected with the spinning blade, be equipped with the extension on the connecting axle circumference, evenly be equipped with a plurality of slope through-holes along the circumference on the extension, be equipped with the air inlet on the supporting rod, be equipped with the gas outlet on the casing.

Preferably, the connecting shaft comprises a first connecting shaft and a second connecting shaft, one end of the first connecting shaft is connected with the output shaft of the motor, the other end of the first connecting shaft is connected with one end of the second connecting shaft, the other end of the second connecting shaft is connected with the rotary blade, the first connecting shaft is circumferentially linked with the second connecting shaft, a gap is formed between the first connecting shaft and the second connecting shaft, an extending part is arranged on the outer circumference of the second connecting shaft, a first elastic part is arranged between the upper end face of the extending part and the shell, and a second elastic part is arranged between the lower end face of the extending part and the shell.

Preferably, the first elastic member is an elastic sponge with a plurality of air holes, and the air outlet is arranged at a position of the shell contacted with the first elastic member.

Preferably, the second elastic member is a spring, a placing groove for the spring to be embedded is formed in the inner bottom surface of the shell, and a part of the spring embedded in the placing groove extends out of the placing groove.

Preferably, the upper part of the second connecting shaft is provided with a special-shaped groove, the lower part of the first connecting shaft is provided with a special-shaped bulge matched with the special-shaped groove, and the special-shaped bulge is inserted into the special-shaped groove to ensure that the first connecting shaft and the second connecting shaft are linked in a circumferential direction,

and when the rotary blade is not stressed, a gap is formed between the special-shaped bulge and the bottom of the special-shaped groove.

Preferably, a first plane bearing is arranged between the upper part of the extension part and the first elastic part, and a second plane bearing is arranged between the lower part of the extension part and the second elastic part.

Preferably, a filtering net cover is arranged at the position of the air outlet of the shell.

Compared with the prior art in the structure more than adopting, the utility model has the advantages of it is following: the inclined through holes are formed in the extending portion of the connecting shaft, so that when the connecting shaft rotates, the inclined through holes can generate suction force, air is sucked into the shell from the air inlet in the supporting rod and then blown out from the air outlet in the shell, the motor and the connecting shaft in the shell can be cooled, the reliability of the motor can be improved, and the service life of the brush cutter is prolonged.

Divide into two parts with the connecting axle, and the circumference links between two connecting axles, and there is the clearance between two connecting axles in addition to both ends all are provided with the elastic component about the extension of second connecting axle, and when the spinning blade touch hard thing like this, the spinning blade can toward retracting, drives the second connecting axle toward retracting, and then makes the spinning blade can not always push against hard thing and lead to the spinning blade to damage, and then has also promoted holistic life.

Make the elastic sponge that has a plurality of gas pockets with first elastic component, when the elastic sponge is extrudeed like this, can extrude the air of inside from the gas outlet, then can absorb the air in the casing again when kick-backing, also accelerate air cycle like this for whole radiating effect is better.

Adopt the spring as second elastic component to in the standing groove on the spring embedding casing, simple to operate like this, the effect is better moreover.

The circumferential linkage is realized through the matching of the special-shaped groove and the special-shaped protrusion, and meanwhile, the radial direction can be freely moved, the structure is simple, and the installation is convenient.

The plane bearing is arranged between the extension part and the two elastic parts, so that the rotation of the second connecting shaft is not influenced, and the normal work of the blade is not influenced.

The filtering net cover is arranged at the air outlet, so that sundries such as weeds and the like can be prevented from entering the shell from the air outlet to influence the normal work of the brush cutter.

Drawings

Fig. 1 is a schematic structural view of the brush cutter of the present invention.

Fig. 2 is a sectional view of the brush cutter of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic structural view of the second connecting shaft in the brush cutter of the present invention.

Fig. 5 is a schematic structural view of the first connecting shaft of the brush cutter of the present invention.

As shown in the figure: 1. a rotary blade; 2. a blade drive mechanism; 3. a protection mechanism; 4. a support rod; 5. a handrail; 6. a power mechanism; 7. a housing; 8. a first connecting shaft; 9. a second connecting shaft; 10. a first elastic member; 11. a second elastic member; 12. a special-shaped groove; 13. irregular bulges; 14. an extension portion; 15. a motor; 16. an air inlet; 17. an air outlet; 18. the through holes are inclined.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

A hedge trimmer according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The first embodiment is as follows:

a brush cutter, as shown in fig. 1 and 2, comprising a rotary blade 1, a blade driving mechanism 2, a protection mechanism 3, a supporting rod 4, a handrail 5 and a power mechanism 6, wherein one end of the supporting rod 4 is provided with the blade driving mechanism 2 and the rotary blade 1, the other end of the supporting rod 4 is provided with the power mechanism 6, the supporting rod 4 is provided with the handrail 5, in this embodiment, the power mechanism 6 is a battery, and the supporting rod is provided with an air inlet 16, wherein:

blade actuating mechanism 2, as shown in fig. 3, including casing 7, motor 15 and first connecting axle 8 and second connecting axle 9, motor 15, first connecting axle 8 and second connecting axle 9 are all installed in casing 7, the output shaft of motor 15 is connected with 8 one end of first connecting axle, the 8 other end of first connecting axle is connected with 9 one end of second connecting axle, the 9 other ends of second connecting axle are connected with rotary blade 1, wherein first connecting axle 8 is spacing can only circumferential direction in casing 7, second connecting axle 9 is with 8 circumferential linkage of first connecting axle, but second connecting axle 9 can be in casing 7 axial displacement, wherein:

as shown in fig. 4, the second connecting shaft 9 is provided with a special-shaped groove 12 at the middle of the upper part, in this embodiment, the special-shaped groove 12 is a segment, i.e. a knife is cut on the cylindrical edge, and the outer edge of the upper part is provided with a circle of extending part 14, and the circumferential direction of the extending part is uniformly provided with a plurality of inclined through holes 18; as shown in fig. 5, the first connecting shaft 8 is provided with a shaped protrusion 13 at the lower part thereof, the cross section of the shaped protrusion 13 in this embodiment is also in a segment shape and is matched with the shaped groove 12, so that after the first connecting shaft 8 and the second connecting shaft 9 are installed, the first connecting shaft 8 and the second connecting shaft 9 are linked in the circumferential direction, that is, when the first connecting shaft 8 rotates, the second connecting shaft 9 rotates along with the first connecting shaft, and because after the first connecting shaft 8 and the second connecting shaft 9 are installed, a certain gap is left between the lower part of the shaped protrusion 13 of the first connecting shaft 8 and the bottom of the shaped groove 12 of the second connecting shaft 9, and the axial direction of the second connecting shaft 9 is mainly supported by the first elastic member 10 and the second elastic member, so that when the rotary blade 1 encounters a hard object, the second connecting member moves in the axial direction, so that the contact between the rotary blade 1 and the hard object can be reduced, beating reduces the risk of damage to the rotary blade 1.

As shown in fig. 3, the first elastic member 10 is an elastic sponge, which has a plurality of air holes inside, and the upper end of the first elastic member is fixed to the housing 7, and a plurality of air outlets 17 are provided at the fixed position of the housing 7, and the second elastic member 11 is a spring, which is actually installed in a placement groove of the housing 7.

The heat dissipation principle of this application is: the work of motor 15 drives first connecting axle 8 and rotates, then drive the linkage of second connecting axle 9, the slope through-hole 18 on the extension 14 of second connecting axle 9 can follow second connecting axle 9 and rotate together this moment, can realize breathing in, just so can admit air from the air inlet 16 of supporting rod 4, then give vent to anger from the gas outlet 17 on the casing 7 after casing 7 inner loop, and when first elastic component 10 was extruded, also can help extruding the air in the casing 7 from gas outlet 17, realize better heat dissipation.

The shock attenuation principle of this application is: when the rotary blade 1 meets a hard object, the second connecting shaft 9 can be upwards retracted to extrude the first elastic part 10, so that the rotary blade 1 is upwards retracted, the rotary blade 1 and the hard object can not be always in hard contact, when the rotary blade 1 leaves the hard object, the second connecting shaft 9 can be reset under the action of the first elastic part 10 and the second elastic part 11, and the probability of damage to the rotary blade 1 is greatly reduced.

Example two:

the difference from the first embodiment is that in the second embodiment, the groove on the second connecting shaft 9 is not shaped and rectangular, and the protrusion on the first connecting shaft 8 is not shaped and rectangular matching with the second connecting shaft 9, so that the two can also realize circumferential linkage.

Example three:

the difference from the first embodiment is that in the third embodiment, a first plane bearing is arranged between the upper end surface of the extending portion 14 of the second connecting shaft 9 and the first elastic member 10, and a second plane bearing is arranged between the lower end surface of the extending portion 14 of the second connecting shaft 9 and the second elastic member 11, so that the two plane bearings are in contact connection with the elastic members, so that the rotation of the second connecting shaft 9 is not affected, and the plane bearings are conventional products in the prior art, so that the details are not described herein.

Example four:

the difference from the first embodiment is that in the fourth embodiment, a filtering net cover is further arranged at the position of the air outlet 17 on the shell 7 to prevent impurities such as weeds and the like from entering the shell from the air outlet.

It should be noted that, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. It is therefore intended that the appended claims be interpreted as covering all alterations and modifications as fall within the true spirit and scope of the invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to be within the intent and scope of the present invention.

Claims

1. The utility model provides a brush cutter, includes rotating blade (1), blade actuating mechanism (2), protection machanism (3), supporting rod (4), handrail (5) and power unit (6), blade actuating mechanism (2) are including casing (7), connecting axle and motor (15), casing (7) and supporting rod intercommunication, connecting axle and motor (15) all set up in casing (7), power unit (6) are the group battery, the group battery is connected with motor (15) electricity, motor (15) output shaft is connected with connecting axle one end, just the connecting axle other end is connected its characterized in that with rotating blade (1): the connecting shaft is provided with an extending part (14) on the circumference, the extending part (14) is uniformly provided with a plurality of inclined through holes (18) along the circumference, the supporting rod is provided with an air inlet (16), and the shell (7) is provided with an air outlet (17).

2. A brush cutter according to claim 1, wherein: the connecting axle includes first connecting axle (8) and second connecting axle (9), first connecting axle (8) one end and motor (15) output shaft, and the first connecting axle (8) other end is connected with second connecting axle (9) one end, the second connecting axle (9) other end is connected with rotating blade (1), and first connecting axle (8) and second connecting axle (9) circumference link, are provided with the clearance between first connecting axle (8) and second connecting axle (9), and are provided with extension (14) on second connecting axle (9) the outer circumference, are provided with first elastic component (10) between extension (14) up end and casing (7), are provided with second elastic component (11) under extension (14) between terminal surface and casing (7).

3. A brush cutter according to claim 2, wherein: the first elastic piece (10) is an elastic sponge with a plurality of air holes, and the air outlet (17) is arranged at the position of the shell (7) which is in contact with the first elastic piece (10).

4. A brush cutter according to claim 2, wherein: the second elastic piece (11) is a spring, a placing groove for embedding the spring is formed in the inner bottom surface of the shell (7), and a part of the spring embedded in the placing groove extends out of the placing groove.

5. A brush cutter according to claim 2, wherein: the upper part of the second connecting shaft (9) is provided with a special-shaped groove (12), the lower part of the first connecting shaft (8) is provided with a special-shaped bulge (13) matched with the special-shaped groove (12), and the special-shaped bulge (13) is inserted into the special-shaped groove (12) to ensure that the first connecting shaft (8) and the second connecting shaft (9) are linked in the circumferential direction,

and when the rotary blade (1) is not stressed, a gap is arranged between the special-shaped bulge (13) and the bottom of the special-shaped groove (12).

6. A brush cutter according to claim 2, wherein: a first plane bearing is arranged between the upper part of the extension part (14) and the first elastic part (10), and a second plane bearing is arranged between the lower part of the extension part (14) and the second elastic part (11).

7. A brush cutter according to claim 1, wherein: and a filtering net cover is arranged at the position of the air outlet (17) of the shell (7).