The content of the invention
The purpose of the present invention is above mentioned problem be present for existing technology, it is proposed that a kind of structure is simpler, work
The brake structure of reliable chain saw.
The purpose of the present invention can be realized by following technical proposal:A kind of brake structure of chain saw, including:
Chain saw frame;
Brake disc, in brake disc periphery, close surround has brake steel band;
Protective plate, is hinged in chain saw frame and its lower end is provided with limited post;
Brake member, its middle part are hinged in chain saw frame, and the brake member lower end is connected with brake steel band, and its upper end is provided with
Limited impression, the brake breach positioned at limited impression close to brake steel band side being adapted to limited post;
Brake extension spring, is connected between brake member and chain saw frame, and when chain saw is in normal operating conditions, the brake is drawn
Spring is in extended state, and now limited post is placed in limited impression.
As a further improvement on the present invention, the limited impression is always positioned at breach side upper position of braking, and stops
Car notch depth is more than limited impression.
As a further improvement on the present invention, it is described brake extension spring be tightly disposed in brake steel band and protective plate lower end it
Between, and the opening of the close brake breach of link position of brake extension spring and brake member.
As a further improvement on the present invention, the brake breach interior walls be smooth transits to limited impression.
As a further improvement on the present invention, the limited post is arranged on protective plate lower end close to edge placement.
As a further improvement on the present invention, the brake member lower end closely connects through brake steel band and with brake steel band
Connect.
A kind of chain saw, include the brake structure of above-mentioned chain saw.
Based on above-mentioned technical proposal, the embodiment of the present invention can at least produce following technique effect:The brake knot of this chain saw
Structure overall construction design compressed spring type structure more of the prior art and drawbar structure are more simple, reliable operation, this brake knot
The brake power element of structure is brake extension spring, rather than skilful as dynamical element, brake member design using handle in the prior art
Wonderful, for close connection protective plate, brake extension spring and brake steel band, the brake extension spring in the present invention is not after brake member acts
Reset element, but the dynamical element of brake member drive brake steel band braking disc is pulled, the reset after brake member action is anti-
But realized by protective plate, the protective plate in the present invention is fitted close with brake member, brake extension spring, and it is mainly used in spacing
Brake member (makes brake extension spring be in extended state), or releasing is spacing, brake extension spring is driven brake member braking disc, this hair
The brake structure of bright extremely simple and ingenious layout not only solves inner space problem, also significantly reduces production cost, has wide
General market application and promotion prospect.
Embodiment
It is the specific embodiment of the present invention and with reference to accompanying drawing below, technical scheme is further described,
But the present invention is not limited to these embodiments.
Technical scheme provided by the invention is illustrated in more detail with reference to Fig. 1 to Fig. 4.
As shown in Figure 1 to Figure 3, the brake structure of this chain saw includes:
Chain saw frame (not shown);
Protective plate 10, is hinged in chain saw frame and its lower end is provided with limited post 11;
Brake disc 20, in the periphery of brake disc 20, close surround has brake steel band 30;
Brake member 40, its middle part are hinged in chain saw frame, and the lower end of brake member 40 is connected with brake steel band 30, thereon
End is provided with the limited impression 41 being adapted to limited post 11, the brake breach positioned at limited impression 41 close to brake steel band 30 side
42;
Brake extension spring 50, is connected between brake member 40 and chain saw frame, when chain saw is in normal operating conditions, the brake
Car extension spring 50 is in extended state, and now limited post 11 is placed in limited impression 41, and brake member 40 is limited post 11 and pushed against, brake
Extension spring 50 can not pull brake member 40;When chain saw is braked, the limited post 11 departs from limited impression 41, and the brake extension spring 50 exists
Restoring force effect is lower to pull brake member 40 to rotate (herein rotate to be rotate counterclockwise shown in Fig. 1) related tension brake steel band 30
Braking disc 20, final limited post 11 are placed in brake breach 42 bottom.
In the present invention, above-mentioned limited post 11 can be connected as a single entity with protective plate 10 also subsequent fixed can be arranged on protective plate
On 10, for convenience of dismantling and safeguarding, preferable limited post 11 is plugged on protective plate 10, and braking procedure track of the invention is as schemed
Shown in 1 and Fig. 2 arrows, by Fig. 1 to Fig. 2, protective plate 10 swings (being only direction as shown) clockwise, and brake extension spring 50 is by the right side
To left reply, the counterclockwise rotates of brake member 40.
The present invention protects a kind of brake structure of chain saw, its overall construction design compressed spring type structure more of the prior art and
Drawbar structure is more simple, reliable operation, and the brake power element of this brake structure is brake extension spring 50, rather than existing skill
Using handle as dynamical element in art, brake member 40 is ingenious in design, for closely connecting protective plate 10, brake extension spring 50 and stopping
Car steel band 30, the present invention in brake extension spring 50 be not brake member 40 act after reset element, but pulling the band of brake member 40
The dynamical element of the dynamic brake braking disc 20 of steel band 30, the reset after brake member 40 acts is realized by protective plate 10 on the contrary
, the protective plate 10 in the present invention is fitted close with brake member 40, brake extension spring 50, and it, which is mainly used in spacing brake member 40, (makes
Brake extension spring 50 be in extended state), or release it is spacing, make brake extension spring 50 drive the braking disc 20 of brake member 40, this hair
The brake structure of bright extremely simple and ingenious layout not only solves inner space problem, also significantly reduces production cost, has wide
General market application and promotion prospect.
Specifically, during normal operating conditions, brake steel band 30 does not hold brake disc 20 tightly, and protective plate 10 is in normal work
Position, now limited post 11 be located in limited impression 41, brake extension spring 50 be in extended state, brake extension spring 50 and the breach that brakes
42 are in the same side of limited impression 41, and due to the effect of limited post 11, brake member 40 is limited post 11 and pushed against, extension spring 50 of braking
Brake member 40 can not be pulled, brake steel band 30 keeps normal condition (even if brake steel band 30 now has brake force, to nor affect on
Chain saw normal work).
Chain saw brake when, external force (such as manual) drive protective plate 10 according to the direction of arrow shown in Fig. 1 that is, clockwise
Direction is swung so that limited post 11 departs from limited impression 41 and is moved to for example shown in Fig. 4 position A at (i.e. brake breach 42 is opened
Position at mouthful), now limit effect releases, and brake extension spring 50 pulls the company of rotating counterclockwise of brake member 40 under restoring force effect
Band tenses the brake braking disc 20 of steel band 30, and in braking procedure, the upper end of brake member 40 is moved towards brake extension spring 50, brake member
40 lower ends are moved away from brake extension spring 50 direction and gradually tense brake steel band 30, and final brake member 40 moves into place, this
When brake the bottom of breach 42 and limited post 11 be abutted together or limited post 11 close to brake breach 42 bottom, (state is anticipated
The pulling force that taste brake extension spring 50 terminates, brake extension spring 50 recovered reset condition), brake member 40 is limited and no longer again
It is mobile.
Need reset when, drive the backswing of protective plate 10 and make limited post 11 carry over brake the inwall of breach 42 be moved to limit
In the groove 41 of position.
It is worth mentioning that:Brake extension spring 50 in the present invention is the extension spring for braking, rather than makes brake member 40 dynamic
Resetted after work, it is the action band by protective plate 10 that brake member 40, which is reset to spacing state (i.e. normal operating conditions shown in Fig. 1),
It is dynamic, along band stretching brake extension spring 50, smart structural design during drive.
Further, limited impression 41 is always positioned at the side upper position of breach 42 of braking, and the depth of breach 42 of braking is big
In limited impression 41;Such topology layout not only ensure that the reliability of overall work, also optimize the space of brake member 40
Layout.
For further lifting chain saw internal space layout compactedness, and brake extension spring 50 drive brake member 40 act can
By property and stress concentration, extension spring 50 of preferably braking is tightly disposed between brake steel band 30 and the lower end of protective plate 10, and is braked and drawn
The opening of spring 50 and the close brake breach 42 of link position of brake member 40.
Make it that reset is reliable after braking, avoids the interference in limited post 11 and the relative movement thereof of brake member 40, reduces
Friction, the interior walls be smooth of breach 42 that preferably brakes transit to limited impression 41.
Above-mentioned limited post 11 is preferably provided at the lower end of protective plate 10 close to edge placement so that protective plate 10 and brake member 40
Even closer cooperation, also reduce the lower end interference of protective plate 10.
Preferably, to ensure that brake member drives brake steel band reliable, and room for promotion is laid out, and the lower end of brake member 40, which passes through, stops
Car steel band 30 is simultaneously closely connected with brake steel band 30.
The present invention also protects a kind of chain saw of the brake structure using above-mentioned chain saw.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.