CN216982594U

CN216982594U - Working head of double-blade grass trimmer

Info

Publication number: CN216982594U
Application number: CN202220279280.4U
Authority: CN
Inventors: 潘陈杰; 潘陈诚; 俞大鹏
Original assignee: Tianchang Renlong Machinery Co ltd
Current assignee: Tianchang Renlong Machinery Co ltd
Priority date: 2022-02-11
Filing date: 2022-02-11
Publication date: 2022-07-19
Anticipated expiration: 2032-02-11
Also published as: WO2023151535A1

Abstract

The utility model discloses a double-blade grass mower working head in the technical field of garden mechanical tools, which comprises a power mechanism, an upper blade driving mechanism and a lower blade driving mechanism, wherein the power mechanism, the upper blade driving mechanism and the lower blade driving mechanism are arranged in a shell, the power mechanism is used for driving the upper blade driving mechanism and the upper blade driving mechanism to rotate, the rotating directions of the upper blade driving mechanism and the upper blade driving mechanism are opposite, and the upper blade and the lower blade are mutually attached.

Description

Working head of double-blade grass trimmer

Technical Field

The utility model relates to the technical field of garden machinery tools, in particular to a grass mower and a brush cutter.

Background

In recent years, due to the improvement of the living standard of people, the home environment of people is greatly improved, and the development of electric garden tools greatly reduces the labor intensity of human beings and improves the working efficiency.

The grass trimmer is also called as grass cutter, brush cutter, weeder, grass trimmer, lawn trimmer, etc. and is one kind of electric or gasoline powered garden machine for trimming lawn, vegetation, etc.

The grass trimmers in the prior art all adopt the unidirectional rotating blades or cutting units, the trimming and cutting are only suitable for small-branch bushes or shrubs, and the bushes with thick branches or hard shrubs are easily bounced off due to reaction force, so that certain potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a working head of a double-blade grass trimmer, which solves the problem of potential safety hazard in the use process of the conventional single-blade grass trimmer and improves the use reliability and safety of the single-blade grass trimmer.

The purpose of the utility model is realized by the following steps: a double-blade mower working head comprises a power mechanism, an upper blade driving mechanism and a lower blade driving mechanism which are arranged in a shell, wherein the power mechanism is used for driving the upper blade driving mechanism and the upper blade driving mechanism to rotate, and the rotating directions of the upper blade driving mechanism and the upper blade driving mechanism are opposite;

the power mechanism comprises a driving arc bevel gear arranged on the shell, and the driving arc bevel gear extends into the shell;

the upper blade driving mechanism comprises an upper driven arc bevel gear meshed with the driving arc bevel gear, the lower end of the upper driven arc bevel gear is connected with a driving disc, bearings are arranged between the peripheries of the upper driven arc bevel gear and the driving disc and the shell, and the bottom of the driving disc is connected with an upper blade;

the lower blade driving mechanism comprises a lower driven arc bevel gear meshed with the driving arc bevel gear, the lower driven arc bevel gear is fixedly sleeved on the periphery of the rotating shaft, the rotating shaft penetrates through the centers of the upper driven arc bevel gear and the driving disc, bearings are arranged between the rotating shaft and the upper driven arc bevel gear as well as between the rotating shaft and the driving disc, the lower end of the rotating shaft is connected with the lower blade, and the lower blade is attached to the upper blade.

Compared with the prior art, the utility model has the beneficial effects that:

the double-blade electric brush has the advantages that the double blades with opposite rotating directions are used, so that no reaction force is generated during operation, the double-blade electric brush cannot be bounced when meeting hard shrubs during use, potential safety hazards are eliminated, the structural design is compact, the weight is reduced, and the double-blade electric brush is stable in operation. The utility model is particularly suitable for cutting hard shrubs and other materials, and simultaneously maintains all functions and operation modes of the original grass.

As a further limitation of the present invention, a cavity for mounting the upper power output mechanism and the lower power output mechanism is provided inside the housing, a mounting hole is formed in a side portion of the housing, the mounting hole is arranged in an inclined manner, and the driving circular bevel gear is mounted in the mounting hole through a bearing. The design of mounting hole can be used to assemble actuating lever and operating handle, and the cooperation external power mechanism can make things convenient for the staff to operate.

As a further limitation of the present invention, the casing includes a housing, an end cap, an upper dust cover, and a lower anti-collision cover, the end cap is connected to the bottom of the housing, a labyrinth structure is formed between the end cap and the driving disc, the upper dust cover is mounted on the end cap, and the lower anti-collision cover is mounted on the rotating shaft. The casing of such design easy dismounting, labyrinth structure can limited reinforcing dustproof effect prevents inside smear metal and the dust entering the quick-witted work head of beating grass.

As a further limitation of the present invention, the drive disk is machined with ratchet teeth on its outer periphery. The ratchet design prevents the winding of the vine man weeds in the operation of the grass trimmer, and the function of cutting off the vine man weeds is achieved.

As a further limitation of the present invention, the top surface of the lower driven circular arc bevel gear is machined into a tooth surface, and the taper angle is greater than 90 °.

As a further limitation of the utility model, the lower driven circular arc bevel gear is made by a powder metallurgy process.

As a further limitation of the present invention, the lower portion of the rotating shaft is sleeved with a first blade clamping plate and a second blade clamping plate, and the lower end of the rotating shaft is connected with a nut in a threaded manner, and the lower blade is clamped and fixed by the first blade clamping plate and the second large clamping plate under the action of the nut. The structure is designed to ensure that the lower blade is more convenient and reliable to mount and fix.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of the external structure of the present invention.

FIG. 2 is a schematic view of the internal structure of the present invention.

FIG. 3 is a cross-sectional view of the present invention.

Fig. 4 is a schematic perspective view of a driving disk according to the present invention.

The device comprises a machine shell 1, a shell 1a, an end cover 1b, an upper dust cover 1c, a lower anti-collision cover 1d, a power mechanism 2, a driving arc bevel gear 2a, a first bearing 2b, an upper blade driving mechanism 3, an upper driven arc bevel gear 3a, a driving disc 3b, a ratchet 3c, a second bearing 3d, a lower blade driving mechanism 4, a lower driven arc bevel gear 4a, a driving shaft 4b, a third bearing 4c, a fourth bearing 4d, a first blade clamping plate 4e, a second blade clamping plate 4f, a nut 4g, an upper blade 5 and a lower blade 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-4, the working head of the double-blade mower comprises a power mechanism 2, an upper blade driving mechanism 3 and a lower blade driving mechanism 4 which are installed in a machine shell 1, wherein the power mechanism 2 is used for driving the upper blade driving mechanism 3 and the upper blade driving mechanism 3 to rotate, the rotating directions of the upper blade driving mechanism 3 and the upper blade driving mechanism 3 are opposite, a cavity for installing the upper power output mechanism and the lower power output mechanism is arranged in the machine shell 1, and a mounting hole with an included angle of 60 degrees is formed in the side part of the machine shell 1;

the power mechanism 2 comprises a driving arc bevel gear 2a which is arranged in the mounting hole through a first bearing 2b, and the driving arc bevel gear 2a extends into the inner cavity of the machine shell 1;

the upper blade driving mechanism 3 comprises an upper driven arc bevel gear 3a meshed with the driving arc bevel gear 2a, the lower end of the upper driven arc bevel gear 3a is connected with a driving disc 3b, ratchets 3c are machined on the periphery of the driving disc 3b, an annular groove is machined on the periphery of the connection part of the upper driven arc bevel gear 3a and the driving disc 3b, a second bearing 3d is sleeved in the annular groove, and the bottom of the driving disc 3b is connected with an upper blade 5;

the lower blade driving mechanism 4 comprises a lower driven arc bevel gear 4a meshed with the driving arc bevel gear 2a, the lower driven arc bevel gear 4a is fixedly sleeved on the periphery of a rotating shaft 4b, the rotating shaft 4b penetrates through the upper driven arc bevel gear 3a and the center of a driving disc 3b, a third bearing 4c is arranged between the rotating shaft 4b and the upper driven arc bevel gear 3a, a fourth bearing 4d is arranged between the rotating shaft 4b and the driving disc 3b, the lower end of the rotating shaft 4b is connected with a lower blade 6, a first blade clamping plate 4e and a second blade clamping plate 4f are sleeved on the lower portion of the rotating shaft 4b, a nut 4g is in threaded connection with the lower end, the first blade clamping plate 4e and the second large blade clamping plate clamp the lower blade 6 under the action of the nut 4g, and the lower blade 6 is attached to the upper blade 5.

When the embodiment works, the power mechanism 2 works, the action of the power mechanism 2 can transmit power to the driving arc bevel gear 2a through an external power shaft, the driving arc bevel gear 2a rotates to respectively drive the upper driven arc bevel gear 3a and the lower driven arc bevel gear 4a to rotate in opposite directions, and then the driving disc 3b and the rotating shaft 4b respectively drive the upper blade 5 and the lower blade 6 to rotate.

In this embodiment, the casing 1 includes a housing 1a, an end cover 1b, an upper dust cover 1c, and a lower anti-collision cover 1d, the end cover 1b is connected to the bottom of the housing 1a, a labyrinth structure is formed between the lower end of the end cover 1b and the driving disk 3b, a circular truncated cone matched with the second bearing 3d is machined on the inner side of the end cover 1b, the upper dust cover 1c is installed on the end cover 1b and acts on the upper blade 5, the labyrinth structure is matched to effectively realize dust prevention, and the lower anti-collision cover 1d is installed on the rotating shaft 4b and acts on the lower blade 6.

In the embodiment, the top surface of the lower driven arc bevel gear 4a is processed into a tooth surface, the taper angle is greater than 90 degrees, and the lower driven arc bevel gear 4a is manufactured by adopting a powder metallurgy process. In the practical use process, in order to continue the arrangement of a 60-degree included angle between a power input shaft and an output shaft of a working head of an original grass trimmer, the use of operators is more convenient, the layout is more compact in the limited space of a working head shell, and the traditional method that the taper angle of a lower driven arc bevel gear is less than 90 degrees is broken through, the taper angle of the lower driven arc bevel gear 4a is designed to be more than 90 degrees.

The above description of the embodiments is only intended to facilitate the understanding of the method of the utility model and its core idea. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, it is possible to make various improvements and modifications to the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The working head of the double-blade grass trimmer is characterized by comprising a power mechanism (2), an upper blade driving mechanism (3) and a lower blade driving mechanism (4) which are arranged in a shell (1), wherein the power mechanism (2) is used for driving the upper blade driving mechanism (3) and the lower blade driving mechanism (4) to rotate, and the rotating directions of the upper blade driving mechanism (3) and the lower blade driving mechanism (4) are opposite;

the power mechanism (2) comprises a driving arc bevel gear (2a) arranged on the machine shell (1), and the driving arc bevel gear (2a) extends into the machine shell (1);

the upper blade driving mechanism (3) comprises an upper driven arc bevel gear (3a) meshed with the driving arc bevel gear (2a), the lower end of the upper driven arc bevel gear (3a) is connected with a driving disc (3b), bearings are arranged between the peripheries of the upper driven arc bevel gear (3a) and the driving disc (3b) and the machine shell (1), and the bottom of the driving disc (3b) is connected with an upper blade (5);

the lower blade driving mechanism (4) comprises a lower driven arc bevel gear (4a) meshed with the driving arc bevel gear (2a), the lower driven arc bevel gear (4a) is fixedly sleeved on the periphery of the rotating shaft (4b), the rotating shaft (4b) penetrates through the centers of the upper driven arc bevel gear (3a) and the driving disc (3b), bearings are arranged between the rotating shaft (4b) and the upper driven arc bevel gear (3a) and between the rotating shaft (4b) and the driving disc (3b), the lower end of the rotating shaft (4b) is connected with a lower blade (6), and the lower blade (6) and the upper blade (5) are attached together.

2. The working head of the double-blade grass mower according to claim 1, wherein a cavity for mounting the upper power output mechanism and the lower power output mechanism is formed in the machine shell (1), mounting holes are formed in the side portion of the machine shell (1) in an inclined mode, and the driving circular bevel gear (2a) is mounted in the mounting holes through bearings.

3. The working head of the double-blade grass trimmer according to claim 1 or 2, wherein the machine shell (1) comprises a shell (1a), an end cover (1b), an upper dust cover (1c) and a lower anti-collision cover (1d), the end cover (1b) is connected to the bottom of the shell (1a), a labyrinth structure is formed between the end cover (1b) and the driving disc (3b), and the upper dust cover (1c) is installed on the end cover (1 b).

4. A working head of a double-bladed lawnmower according to claim 1 or 2, characterized in that the driving disc (3b) is machined with ratchet teeth (3c) on its periphery.

5. The working head of the double-blade grass trimmer according to claim 1 or 2, characterized in that the top surface of the lower driven arc bevel gear (4a) is machined into a tooth surface, and the taper angle is greater than 90 degrees.

6. The double-bladed lawnmower work head according to claim 5, characterized in that the lower driven bevel gear wheel (4a) is made by powder metallurgy.

7. The working head of the double-blade grass trimmer according to claim 1 or 2, wherein the lower part of the rotating shaft (4b) is sleeved with a first blade clamping plate (4e) and a second blade clamping plate (4f), the lower end of the rotating shaft is in threaded connection with a nut (4g), and the lower blade (6) is clamped and fixed by the first blade clamping plate (4e) and the second large clamping plate under the action of the nut (4 g).