CN111940834A

CN111940834A - Chain saw of quick braking

Info

Publication number: CN111940834A
Application number: CN202010656653.0A
Authority: CN
Inventors: 高建; 陈洁
Original assignee: Zhejiang YAT Electrical Appliance Co Ltd
Current assignee: Zhejiang YAT Electrical Appliance Co Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2020-11-17

Abstract

The invention discloses a chain saw capable of being quickly braked, which comprises a machine head, a chain plate and a saw chain, wherein the chain plate and the saw chain are connected to the front end of the machine head, the machine head comprises a shell, an elastic trigger, a switch, a driving device and a braking device, the driving device and the braking device are arranged in the shell, the driving device is connected with the saw chain to drive the saw chain, a braking piece is arranged on the driving device, the braking device comprises an elastic resetting piece, a braking connecting rod and a braking rod, one end of the braking rod is connected with the elastic resetting piece, the other end of the braking rod is connected with the braking connecting rod, the elastic trigger triggers the switch. According to the electric chain saw, the elastic trigger drives the brake connecting rod to trigger the switch, so that the driving device drives the saw chain to cut trees, when the electric chain saw jumps, a user loosens the elastic trigger, the elastic reset piece pulls the brake connecting rod to be far away from the switch through the brake rod under the action of elasticity to cut off a power supply of the driving device, and pulls the brake rod to be in contact with the brake piece to brake the driving device, and the electric chain saw is safer to use.

Description

Chain saw of quick braking

Technical Field

The invention belongs to the field of garden machinery, and particularly relates to a chain saw capable of braking quickly.

Background

The electric chain saw is a traditional electric tool and has certain dangerousness in the practical operation process, if the saw chain is touched with a relatively hard object such as a tree knot or a metal object when cutting trees, the electric chain saw can be separated from the hand of an operator and jump towards the body of the operator, so that the operating saw chain cuts the operator.

Disclosure of Invention

The present invention is directed to a chain saw with a quick brake, so as to solve at least one of the above problems.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a chain saw of quick braking, including the aircraft nose and connect link joint and the saw chain at the aircraft nose front end, the aircraft nose includes the casing, the elasticity trigger, the switch and locate drive arrangement and the arresting gear in the casing, drive arrangement links to each other with the saw chain in order to drive the saw chain, the last braking piece that is equipped with of drive arrangement, arresting gear includes the elasticity piece that resets that links to each other with the casing, brake connecting rod and the brake lever of rotation connection in the casing, brake lever one end resets with elasticity and links to each other, the other end links to each other with brake connecting rod, the elasticity trigger compresses tightly the braking piece through the pulling brake lever with the braking.

In the chain saw of above-mentioned quick braking, the brake connecting rod includes the trigger bar and the trace that set up perpendicularly, and the trigger bar includes installation end and trigger end, and the trigger bar is connected the brake connecting rod that forms "T type" through the middle part of installation end with the trace, and the elasticity trigger triggers the switch through pulling trigger end.

In the chain saw with the rapid braking function, the linkage rod comprises a first linkage end and a second linkage end, a sliding groove is formed in the first linkage end, and a rotating shaft extending into the sliding groove is arranged at the end part of the brake rod, so that the linkage rod is in sliding connection with the brake rod.

In the chain saw with the rapid braking function, the braking device further comprises a protection plate arranged outside the shell and a driving rod arranged in the shell, one end of the driving rod is connected with the protection plate to rotate together, and the other end of the driving rod is rotatably connected with the second linkage end.

In the chain saw with the quick brake function, the driving rod is provided with the positioning groove, the shell is rotatably connected with the reset rod and the elastic piece, and the elastic piece pushes the reset rod to be clamped into the positioning groove.

In the chain saw with the rapid braking function, the trigger end is provided with the trigger bulge positioned at the lower part of the switch, and the elastic trigger is provided with the pulling bulge which is propped against the bottom of the trigger bulge.

In one of the above described quick braking chain saws, the drive arrangement comprises a drive assembly for driving the saw chain via a drive assembly and a transmission assembly, and the brake lever is braked by separating the drive assembly and the transmission assembly.

In the chain saw of above-mentioned quick braking, drive assembly includes driving motor and the reduction gear who links to each other with driving motor, and reduction gear includes the gear shaft, and drive assembly includes the output shaft, and the brake spare cup joints respectively for both ends outside output shaft and gear shaft in order to drive both pivoted transmission torsional springs, brake lever and transmission torsional spring tip butt to make transmission torsional spring and output shaft or gear shaft separation.

In the chain saw with the rapid braking function, the end part of the brake rod is abutted against one end, close to the gear shaft, of the transmission torsion spring, so that one end of the torsion spring is separated from the gear shaft, and the other end of the torsion spring is tightly held on the transmission shaft.

Compared with the prior art, the invention has the beneficial effects that:

the elastic reset piece pulls the brake connecting rod to be far away from the switch through the brake rod under the action of elastic force to cut off the power supply of the driving device, and pulls the brake rod to be in contact with the brake piece to brake the driving device, and simultaneously, the power supply of the driving device is cut off and the driving device is braked, so that the electric chain saw can be rapidly stopped and emergently braked, the saw chain in operation is prevented from cutting the user, and the use is safer.

Drawings

The invention is further described with reference to the accompanying drawings and the detailed description below:

FIG. 1 is an exploded view of a quick brake chain saw of the present invention;

FIG. 2 is a cross-sectional view of a quick braking chain saw of the present invention in an unbraked condition;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is a cross-sectional view of a quick brake chain saw braking state of the present invention;

FIG. 6 is an enlarged view of section C of FIG. 5;

fig. 7 is an enlarged view of a portion D of fig. 5.

Reference numerals:

100. a housing; 110. a braking member; 200. an elastic trigger; 210. pulling the protrusion; 300. a switch; 400. a drive assembly; 410. a drive motor; 420. a reduction gear; 500. a transmission assembly; 600. an elastic reset member; 700. a brake link; 710. a trigger lever; 711. an installation end; 712. a trigger end; 713. a trigger protrusion; 720. a linkage rod; 721. a first linkage end; 722. a second linkage end; 723. a chute; 800. a brake lever; 810. a rotating shaft; 900. a protection plate; 910. a drive rod; 911. positioning a groove; 920. a reset lever; 930. an elastic member.

Detailed Description

The invention provides a chain saw capable of quickly braking, which comprises a machine head, a chain plate and a saw chain, wherein the chain plate and the saw chain are connected to the front end of the machine head, the machine head comprises a shell, an elastic trigger, a switch, a driving device and a braking device, the driving device and the braking device are arranged in the shell, the driving device is connected with the saw chain to drive the saw chain, a braking piece is arranged on the driving device, the braking device comprises an elastic resetting piece connected with the shell, a braking connecting rod and a braking rod rotatably connected in the shell, one end of the braking rod is connected with the elastic resetting piece, the other end of the braking rod is connected with the braking connecting rod, the elastic trigger triggers the switch. The elastic reset piece pulls the brake connecting rod to be far away from the switch through the brake rod under the action of elastic force to cut off the power supply of the driving device, and pulls the brake rod to be in contact with the brake piece to brake the driving device, and simultaneously, the power supply of the driving device is cut off and the driving device is braked, so that the electric chain saw can be rapidly stopped and emergently braked, the saw chain in operation is prevented from cutting the user, and the use is safer.

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered 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, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The first embodiment is as follows:

a chain saw capable of being braked quickly is disclosed, as shown in fig. 1 to 7, and comprises a machine head, a chain plate and a saw chain, wherein the chain plate and the saw chain are connected to the front end of the machine head, the machine head comprises a shell 100, an elastic trigger 200, a switch 300, a driving device and a braking device, the driving device and the braking device are arranged in the shell 100, the elastic trigger 200 and the switch 300 are arranged on the shell 100, the driving device is connected with the saw chain to drive the saw chain, a braking piece is arranged on the driving device, the braking device comprises an elastic resetting piece 600 connected with the shell 100, a braking connecting rod 700 and a braking rod 800 rotatably connected in the shell 100, one end of the braking rod 800 is connected with the elastic.

When the chain saw needs to be opened, a user presses the elastic trigger 200, the elastic trigger 200 moves towards the switch 300, the end part of the brake connecting rod 700 is pulled towards the switch 300, the brake connecting rod 700 is contacted with the switch 300 to achieve the purpose of triggering the switch 300, and the switch 300 is triggered to electrify the driving device and drive the saw chain to cut. At the same time, the end of the brake link 700 is pulled by the elastic trigger 200 to move upward, so the other end of the brake link 700 connected to the brake lever 800 also pulls the brake lever 800 upward, so that the end of the brake lever 800 close to the brake piece rotates in a direction away from the brake piece and pulls the elastic reset piece 600.

When the chain saw needs to be closed and braked, a user releases the pressed elastic trigger 200, the elastic trigger 200 moves to the direction far away from the switch 300 under the action of elastic force to reset, at the moment, the elastic trigger 200 does not pull the brake link 700 upwards any more, after the brake link 700 loses the force pulling the brake link 700 upwards, the elastic resetting piece 600 pulls the brake bar 800 in the direction of the brake piece under the action of elastic force, the end part of the brake bar 800 is contacted with the brake piece to brake the driving device, one end of the brake bar 800 rotates to brake, and at the same time, the other end pulls the brake link 700 in the direction far away from the switch 300, so that the end part of the brake link 700 is separated from the switch 300 to stop triggering the switch 300, the power supply of the driving device is cut off.

According to the invention, the elastic trigger 200 drives the brake connecting rod 700 to trigger the switch 300, so that the driving device drives the saw chain to cut trees, when the electric chain saw is broken away from the hand of a user and jumps towards the body direction of the user due to the fact that the electric chain saw is contacted with a hard object such as a tree knot or a metal object, at the moment of breaking away from the hand of the user, the user releases and loosens the elastic trigger 200, the elastic trigger 200 does not limit the position of the brake connecting rod 700 any more, the elastic resetting piece 600 pulls the brake connecting rod 700 away from the switch 300 through the brake rod 800 under the action of elasticity to cut off the power supply of the driving device, and pulls the brake rod 800 to contact the brake piece to brake the driving device, and meanwhile, the power supply of the driving device is cut off and the driving device is braked, so that the electric chain saw can be rapidly stopped and emer.

In this embodiment, the brake link 700 includes a trigger 710 and a linkage 720, which are vertically disposed, the trigger 710 includes a mounting end 711 and a trigger end 712, the trigger 710 is connected to the middle of the linkage 720 through the mounting end 711 to form a "T-shaped" brake link 700, the elastic trigger 200 triggers the switch 300 by pulling the trigger end 712, the linkage 720 includes a first linkage 721 and a second linkage 722, the first linkage 721 is provided with a sliding slot 723, and an end of the brake lever 800 is provided with a rotating shaft 810 extending into the sliding slot 723, so that the linkage 720 is slidably connected to the brake lever 800.

The braking device in this embodiment further includes a protection plate 900 disposed outside the housing 100 and a driving rod 910 disposed inside the housing 100, wherein one end of the driving rod 910 is connected to the protection plate 900 to rotate together, and the other end is connected to the second linkage end 722 to rotate. When a user uses the electric chain saw, the protection plate 900 is located between the hand of the user and the saw chain, when one end of the saw chain of the electric chain saw jumps towards the body direction of the user, the hand of the user touches the protection plate 900 and pushes the protection plate 900 towards the saw chain direction of the front end of the machine head, the protection plate 900 rotates towards the saw chain direction and drives the driving rod 910 to rotate towards the front end of the machine head, the driving rod 910 pulls the linkage rod 720 towards the front end of the machine head through the second linkage end 722, so that the trigger end 712 is separated from the switch 300 and the elastic trigger 200, even if the hand of the user is still pressed on the elastic trigger 200, the driving device can be powered off, the elastic trigger 200 cannot continue limiting the brake connecting rod 700, and finally the elastic reset piece 600 pulls the brake rod 800 to contact the brake piece under the elastic action so as to brake the. Even if the user does not release the elastic trigger 200, emergency braking can be performed through the guard plate 900, and braking is performed when the elastic trigger 200 is stuck or the user cannot release the elastic trigger 200, so that safety and reliability are improved. In this embodiment, preferably, the trigger end 712 is provided with a trigger protrusion 713 located at a lower portion of the switch 300, the elastic trigger 200 is provided with a pulling protrusion 210 abutting against a bottom of the trigger protrusion 713, and the elastic trigger 200 drives the trigger protrusion 713 to move through the pulling protrusion 210, so that the operation is more stable and reliable.

In this embodiment, a positioning groove 911 is formed in the driving rod 910, the reset rod 920 and the elastic member 930 are rotatably connected to the casing 100, one end of the elastic member 930 is fixed in the casing 100, the other end of the elastic member 930 abuts against the reset rod 920, and the elastic member 930 pushes the reset rod 920 towards the positioning groove 911 under the action of elastic force, so that the protrusion on the reset rod 920 is clamped into the positioning groove 911. When the user pushes the protection plate 900 forward, after the positioning slot 911 passes the protrusion, the release link 920 pushes the driving rod 910 forward under the push of the elastic member 930, and with the help of the elastic member 930, the driving rod 910 can more quickly drive the triggering end 712 of the braking link 700 to disengage from the switch 300 and the elastic trigger 200, so that the braking is faster.

In this embodiment, the driving device includes the driving assembly 400 and the transmission assembly 500, the driving assembly 400 drives the saw chain through the transmission assembly 500, and the brake rod 800 separates the driving assembly 400 and the transmission assembly 500 to brake, so that the driving assembly 400 no longer continues to drive the transmission assembly 500 to rotate, and then the effect of cutting off the driving source of the saw chain is achieved. Preferably, drive assembly 400 includes driving motor 410 and the reduction gear 420 who links to each other with driving motor 410, reduction gear 420 includes the gear shaft, drive assembly 500 includes the output shaft, the brake spare cup joints respectively for both ends outside output shaft and gear shaft in order to drive both pivoted transmission torsional springs, the transmission torsional spring is embraced tightly outside output shaft and gear shaft, during the braking, the tip of brake lever 800 offsets with the one end that the transmission torsional spring is close to the gear shaft, make the transmission torsional spring be close to the one end internal diameter grow of gear shaft, the gear shaft is no longer embraced to the transmission torsional spring, namely stop through the transmission torsional spring transmission between gear shaft and the output shaft, the transmission shaft is embraced tightly so that the transmission shaft brakes to the one end that the transmission torsional spring is close.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a chain saw of quick braking, includes the aircraft nose and connects link joint and the saw chain at the aircraft nose front end, the aircraft nose includes casing, elasticity trigger, switch and locates drive arrangement and the arresting gear in the casing, drive arrangement links to each other with the saw chain in order to drive the saw chain, its characterized in that: the brake device comprises an elastic reset piece, a brake connecting rod and a brake rod, wherein the elastic reset piece is connected with the shell, the brake connecting rod is connected with the brake rod in the shell in a rotating mode, one end of the brake rod is connected with the elastic reset piece, the other end of the brake rod is connected with the brake connecting rod, the elastic trigger is used for triggering the switch by pulling the brake connecting rod, and the elastic reset piece is used for compressing the brake piece to brake by pulling the brake rod.

2. A quick braking chain saw as set forth in claim 1 wherein: the brake connecting rod includes perpendicular trigger lever and the trace that sets up, the trigger lever includes installation end and trigger end, the trigger lever passes through the installation end with the brake connecting rod of formation "T type" is connected at the middle part of trace, the elasticity trigger is through the pulling trigger end trigger switch.

3. A quick braking chain saw as set forth in claim 2 wherein: the linkage rod comprises a first linkage end and a second linkage end, a sliding groove is formed in the end portion of the brake rod, and a rotating shaft extending into the sliding groove is arranged at the first linkage end, so that the linkage rod is in sliding connection with the brake rod.

4. A quick braking chain saw as set forth in claim 3 wherein: the braking device further comprises a protection plate arranged outside the shell and a driving rod arranged in the shell, one end of the driving rod is connected with the protection plate to rotate together, and the other end of the driving rod is connected with the second linkage end in a rotating mode.

5. A quick braking chain saw as set forth in claim 4 wherein: the driving rod is provided with a positioning groove, the shell is internally and rotatably connected with a reset rod and an elastic piece, and the elastic piece pushes the reset rod to be clamped into the positioning groove.

6. A quick braking chain saw as set forth in claim 2 wherein: the trigger end is provided with a trigger bulge positioned at the lower part of the switch, and the elastic trigger is provided with a pulling bulge which is propped against the bottom of the trigger bulge.

7. A quick braking chain saw as claimed in any one of claims 1 to 6 wherein: the driving device comprises a driving assembly and a transmission assembly, the driving assembly drives the saw chain through the transmission assembly, and the brake rod is used for braking by separating the driving assembly and the transmission assembly.

8. A quick braking chain saw as set forth in claim 7 wherein: the drive assembly includes driving motor and the reduction gear who links to each other with driving motor, reduction gear includes the gear shaft, drive assembly includes the output shaft, the brake spare cup joints respectively for both ends outside output shaft and gear shaft in order to drive both pivoted transmission torsional springs, the brake lever with transmission torsional spring tip butt, so that the transmission torsional spring with output shaft or gear shaft separation.

9. A quick braking chain saw as set forth in claim 8 wherein: the end part of the brake rod is abutted against one end of the transmission torsion spring close to the gear shaft, so that one end of the torsion spring is separated from the gear shaft, and the other end of the torsion spring tightly holds the transmission shaft.