CN202087898U - Chain saw - Google Patents

Abstract

The utility model provides a chain saw which comprises a machine shell, a motor, a fan, a chain wheel, a guide plate and a saw cutting chain, wherein the motor is arranged in the machine shell; the fan and the chain are driven by the motor; the guide plate is arranged on the machine shell; the saw cutting chain is arranged on the chain and the guide plate; an air passage is formed in the machine shell; a first end of the air passage is close to the fan; and a second end of the air passage is close to the saw cutting chain. By adopting the air passage mechanism of the utility model, the saw cutting efficiency is improved and the service life of the saw cutting chain is prolonged.

Description

Chain saw

Technical field

The utility model relates to a kind of chain saw.

Background technology

Present existing chain saw; when carrying out sawing; usually can adhere to wood on the sawing chain cuts or other impurity; these impurity usually by the sawing chain in the process of rotation, the inertia force by impurity is thrown out of, because the restriction of inertia force size; usually having certain impurity still sticks on the sawing chain; obviously, cause the low of cutting-rate so on the one hand, also influence the service life of sawing chain on the other hand.

Summary of the invention

The technical problem that the utility model solves provides a kind of chain saw, has improved the security of chain saw.

For solving the problems of the technologies described above, what the utility model provided comprises: a casing, a motor that is installed in the casing, one by motor-driven fan, one by motor-driven sprocket wheel, guide plate with front-end and back-end, a tip shroud is installed on the described guide plate front end, one is used for fixing the guide plate rear end and is installed to sawing chain cover plate on the casing, a sawing chain that is installed on sprocket wheel and the guide plate, an anti-bounce-back guard shield, described chain saw also comprise a dish-type guard shield with front-end and back-end, and the rear end of described dish-type guard shield is installed on the casing.

Describe by the drawings and specific embodiments hereinafter, other features of the present utility model and advantageous effects will obtain describing and be clearer.

Description of drawings

Fig. 1 is the stereogram of the chain saw of a first-selected embodiment of the present utility model, and wherein the part casing is removed;

Fig. 2 is the stereogram of the chain saw of first-selected embodiment of the present utility model, has showed the structure of dust outlet box;

Fig. 3 is the stereogram of the chain saw of first-selected embodiment of the present utility model, has showed that drifting dust mechanism is positioned at the stereogram of casing part;

Fig. 4 is the stereogram of the chain saw of first-selected embodiment of the present utility model, has showed that drifting dust mechanism is positioned at the stereogram of the outer part of casing;

Fig. 5 is the flow graph of drifting dust air-flow outside drifting dust mechanism outlet of drifting dust mechanism of the chain saw of first-selected embodiment of the present utility model;

Fig. 6 is the air flow direction figure in drifting dust mechanism of the chain saw of first-selected embodiment of the present utility model;

Fig. 7 shows an embodiment of the arrangement indicating device of the utility model chain saw, and wherein safety indicating device is positioned at safe indicating positions;

Fig. 8 is that the safety indicating device of chain saw is positioned at non-safe indicating positions among Fig. 7;

Fig. 9 is the installation diagram of the warning indication arm of the safety indicating device of chain saw among Fig. 7;

Figure 10 has shown the stereogram of the safety indicating device among Fig. 7 with the assembly relation of anti-bounce-back guard shield;

Figure 11 is the stereogram that the chain guard of the utility model chain saw is in the off-position;

Figure 12 is the stereogram that the chain guard of the utility model chain saw is in locked position;

Figure 13 is the stereogram of assembly relation that has shown the locking device of the safety indicating device of the utility model chain saw and sawing chain guard;

Figure 14 shows the stereogram of the safety guard of the utility model chain saw;

Figure 15 shows the sawing indicating area of the guide plate of the utility model chain saw;

Figure 16 shows the arrestment mechanism and the intermeshing stereogram of sprocket wheel of the utility model chain saw;

Figure 17 shows the arrestment mechanism of the utility model chain saw and the stereogram that sprocket wheel breaks away from mutually.

The specific embodiment

As Fig. 1,2,3, shown in 16, the chain saw of a first-selected embodiment of the present utility model comprises that 1, one of back handle that 2, one of casings are connected to casing 2 rear ends is fixedly installed on the casing 2 and near the front handlebar 6 of the front end of casing 2, an anti-bounce-back guard shield 4 rotates the front end that is installed to casing 2 first-selectedly, and casing 2 forms a length of extending along the front and back handle direction to axis X.Chain saw also comprises a motor 3 that is installed in the casing 2, and motor 3 has a motor shaft (not shown), and preferably, Y-axis is perpendicular to X-axis.Be installed to along on the output shaft 34 of Y-axis line direction at a sprocket wheel 10, motor 3 rotates by a transmission mechanism drive sprocket 10 that connects output shaft 34 and motor shaft, and transmission mechanism can be that planetary gear construction also can be other reduction gear or the like.Long on the direction of axis X on the edge, one guide plate 5 is installed in the place ahead of sprocket wheel 10, and be fixed on the casing 2 by cover plate 7 and nut 8, the week that one sawing chain 11 is installed in sprocket wheel 10 and guide plate 5 makes progress, thereby realizes that the sawing chain can be driven along moving around sprocket wheel and the circumferential motion path Z of guide plate by sprocket wheel.Above structure is known by those of ordinary skill in the art, is not describing in detail at this.

As Fig. 3,4,5, shown in 6, fan 12 is installed on the motor shaft (not shown) in the chain saw of first-selected embodiment of the present utility model, and by the motor shaft driven rotary.Fan 12 circumferentially and form a circular passage W between the casing 2.Chain saw of the present utility model has an air channel, and the air channel mainly is made of the inner chamber of a tube-like piece 13 in first-selected embodiment, and tube-like piece 13 can link to each other with casing 2 by the mounting means of knowing, and for example screw, buckle etc. are not described in detail at this.Tube-like piece 13 has one first end 13a and one second end 13b, the first end 13a extend in the casing 2 and and circular passage W communicate, the air-flow of fan formation can flow along the air channel in the tube-like piece like this.The first end 13a of first-selected ground tube-like piece is near fan.Be formed with a hole 14 on casing 2, hole 14 preferably is positioned at the below of sawing chain 11, and obviously, hole 14 also can be positioned at the top of sawing chain.The second end 13b of tube-like piece stretches into hole 14 and is positioned at the below of sawing chain.The second end 13b of tube-like piece 13 preferably pass hole 14 on the casing 2 make the wind that blow out from the second end 13b more near the sawing chain certain a bit, in order further to improve drifting dust efficient, the second end 13b bending of tube-like piece 13 makes on direction and the sawing chain of the air-flow that blows out from second end that the tangential direction of certain any motion path Z is consistent.For further will be more air-flows introduce tube-like piece 13, the first end 13a shape preferably one tubaeform.When motor 3 starts, 12 rotations of motor 3 drive fan, form air-flow by being rotated in the W of circular passage of fan 12, at least a portion air-flow enters the first end 13a of tube-like piece 13, arrow direction in the figure, and blow out from the second end 13b of tube-like piece, and blow to sawing chain 11, dust on the sawing chain 11 or impurity break away from sawing chain 11 under the blowing of its own inertial and air-flow.In other embodiments, part or all of air channel also can be formed by the member of casing itself, for example the member of casing inside formation air channel is positioned at a casing part, another part that tube-like piece forms the air channel is installed on this external casing, or the like, other forms of structure can certainly be arranged.In addition, a dedusting box 9 is installed also on casing, dedusting box 9 can be installed on the casing 2 by screw or other suitable manner.Dedusting box 9 is by 9a, two parts of 9b are formed and are had an opening 9c, dedusting box 9 is positioned at the below of sawing chain 11, and the air-flow that blows out from the second end 13b blows to the opening 9c of dust outlet box 9, thereby the dust of the sawing chain 11 that blows off or impurity can enter the opening 9c of dust outlet box 9 and discharge.In addition, dedusting box 9 also can be a part or be made of a plurality of parts.Dedusting box 9 also can be replaced by dust bag or dust-collecting box, and dust bag or dust-collecting box are installed on the casing, forms an opening on dust bag or the dust-collecting box, and the wind that second end in air channel blows out is to the opening of dust bag or dust-collecting box.

Fig. 7,8,9,10 have shown an embodiment of the safety indicating device of the utility model chain saw.As shown in figure 10, the anti-bounce-back guard shield 4 that is rotatably installed in casing 2 front ends comprises grip portions 4a, pivotal axis part 4b, and pivotal axis part 4b has a pivot center O, pivot center O is parallel with the Y-axis line and perpendicular to growing to axis X, and pivotal axis part 4b comprises a mounting portion 4e and and stretches into part.Stretch into partly to comprise and stretch into main body 4c, indication arm 4d, an indication arm 4d comprises a body part 4d1 and a safe indicating section 4d2, safe indicating section 4d2 becomes a U-shaped bending and forms a space, body part 4d1 becomes a hollow cylinder, can stretch on the main body 4c indicating arm 4d be press fit into by this hollow cylinder, indicating arm 4d also can be installed to by other mode of knowing in addition stretches on the main body 4c, as welding, grafting etc., indicate the arm 4d also can be certainly with to stretch into main body 4c integrally formed.As Fig. 1, shown in 7,8, anti-bounce-back guard shield 4 is installed on the casing 2 by the mounting portion 4e rotation of pivotal axis part 4b, stretch into part and be positioned at casing inside, anti-bounce-back guard shield 4 can rotate between home shown in Figure 7 and non-home shown in Figure 8 with respect to casing 2.Chain saw of the present utility model comprises an arrestment mechanism that is driven by anti-bounce-back guard shield 4, when anti-bounce-back guard shield 4 rotates to primary importance (home) around pivot center O (as Fig. 7), arrestment mechanism and sprocket wheel interact, and sprocket wheel can not be output a driven rotary 10 this moments; When anti-bounce-back guard shield 4 rotates to the second place (non-home) around pivot center O (as Fig. 8), arrestment mechanism and sprocket wheel 10 are thrown off mutually, thereby sprocket wheel can be along with the output shaft motion under the driving of motor.As Figure 16,17 have shown an embodiment of this arrestment mechanism, comprise 30, one brake arms 31 of a pusher arm.One end of pusher arm 30 is fixedly mounted on and stretches on the main body 4c, the other end has an arch section 30a, be formed with an installing hole 31b on the brake arm 31, by installing hole 31b, brake arm 31 can be installed on the turning cylinder 32 that is fixedly mounted on the casing, and brake arm 33 can be around turning cylinder 32 rotations under the effect of back-moving spring 33 when having external force between brake arm 33 and the casing thereby a back-moving spring 33 is contained in.Brake arm 31 also comprises a receiving slit 31a, an inclined-plane 31c, a brake tooth 31d.Pusher arm 30 have an arch section 30a that can cooperate with receiving slit 31a.One spragging gear 35 is slidably mounted on the output shaft 34 along Y-axis line direction, and a spring 36 is installed between spragging gear 35 and the sprocket wheel 10 (not showing among Figure 16,17).Spragging gear 35 comprises a brake tooth 35a and a clutch tooth 35b.Transmission mechanism also comprises a gear 37, gear 37 comprise one can with the clutch tooth 37a of clutch tooth 35b engagement.When anti-bounce-back guard shield 4 promotes forward and is positioned at primary importance, the arch section 30a of pusher arm 30 breaks away from the receiving slit 31a of brake arm 31 under the drive of stretching into main body 4c, this moment, brake arm 31 rotated under the effect of spring 33, the spring force that the inclined-plane 31c of brake arm 31 overcomes spring 36 promotes spragging gear 35 towards sprocket wheel 10 slips, thereby clutch tooth 35b and clutch tooth 37a break away from, the brake tooth 31d of brake arm 31 and brake tooth 35a engagement simultaneously, even this moment, the drive motors running can not drive the sprocket wheel rotation yet again, thereby utensil is in a safe condition down; When the operator promotes anti-bounce-back guard shield 4 to the second place, the arch section 30a of pusher arm 30 discharges spragging gear 35 at the inclined-plane 31c that the back stretch of receiving slit 31a that enters brake arm 31 under the drive of stretching into main body 4c and spring 33 makes brake arm 31 turn to brake arm 31 around turning cylinder 32 to make and slides until clutch tooth 35b and clutch tooth 37a engagement along Y-axis line direction away from sprocket wheel 10 under the restoring force effect of spragging gear 35 at spring 36, and the brake tooth 31d of brake arm 31 and brake tooth 35a break away from, this moment, but utensil was in duty, under the promptly non-safe condition.On the casing of the safe indicating section 4d2 position correspondence of indication arm 4d an observation panel 18a is arranged.As shown in Figure 7, when anti-bounce-back guard shield 4 is in primary importance, utensil is in a safe condition, and the safe indicating section 4d2 of indication arm 4d aligns with observation panel 18a, by observation panel 18a, the operator can observe safe indicating section 4d2, thereby safe indicating section 4d2 can be in a safe condition down by prompting operation person's utensil, and in addition, safe indicating section 4d2 preferably comprises safety indication literal or figure, as printed words such as " safety ", can give the operator like this and more directly point out.Observation panel can be a through hole, also can be a transparent part.In order to prevent that impurity such as dust from entering utensil inside, observation panel 18a place preferably is equipped with dismountable transparent unit in addition, and transparent unit can be that transparent plastic or other material transparent constitute.As shown in Figure 8, when the second place shown in anti-bounce-back guard shield 4 is positioned at, utensil is in non-safe condition, and the observation panel 18a that the safe indicating section 4d2 position of indication arm 4d and casing place form staggers, thereby the operator can not observe the safe indicating section 4d2 of safety indication arm 4d.As shown in Figure 9, in order better to be implemented in prompting user under the non-safe condition, inside at casing 2 is provided with the indication arm mounting bracket 17 of reporting to the police near observation panel 18a place, the indication arm 16 of reporting to the police is fixed on this mounting bracket 17, thereby the indication arm 16 of reporting to the police is positioned at observation panel 18a below and aligns with it.When anti-bounce-back guard shield 4 is positioned at primary importance, the safe indicating section 4d2 of indication arm 4d is between observation panel 18a and warning indication arm 16, promptly cover the indication arm 16 of reporting to the police, preferably report to the police in the space of indication arm 16 between two arms of the U-shaped of the safe indicating section of safety indication arm, the operator can observe safe indicating section 4d2; When anti-bounce-back guard shield 4 was positioned at the second place, the safe indicating section 4d2 of indication arm 4d left described warning indication arm 16, promptly staggers with observation panel 18a, and the operator can observe the indication arm 16 of reporting to the police, thereby prompting operation person's utensil this moment is in non-safe condition.The same indication arm 16 of reporting to the police can have a warning indicating section that includes report to the police indication literal or figure.By said structure, the security of utensil improves greatly.

As Figure 11, shown in 12,13, shown the retaining mechanism of chain guard of the present utility model.The part that stretches into of the anti-bounce-back guard shield 4 of the utility model chain saw also comprises a lock portion 19, in the diagram, lock portion 19 with stretch into part to stretch into main body 4c directly integrally formed, can certainly by screw thread or other suitable manner with stretch into the main body 4c that stretches into partly and be connected.One sawing chain guard 7 is installed on the casing 2 by nut 8, sawing chain guard 7 comprises upper cover plate 7a, be formed with a mating part on the upper cover plate 7a, mating part is a L type groove 20 herein, L type groove 20 comprise one along parallel and long to the axis X bearing of trend transverse groove 20a and one perpendicular to long to axis X bearing of trend and the cannelure 20b that extends towards casing, lock portion 19 comprises a locking main body 19a and a locking pin 19b, locking main body 19a preferably becomes column type, locking pin 19b is installed on the locking main body 19a, and stretches out along the radial direction of locking main body 19a.Lock portion 19 can only comprise locking pin 19b in addition, locking pin 19b directly be installed to or be formed at stretch into the part stretch on the main body 4c. as Figure 11, shown in 12, lock portion 19 stretches out casing 2, and locking pin 19b stretches into the L type groove on the guard shield 7.When anti-bounce-back guard shield 4 was positioned at primary importance, as Figure 11, locking pin 19b was positioned at the cannelure 20b of L type groove 20, and locking pin 19b and L type groove 20 break away from, and this moment, the operator can pull down chain guard 7 by rotation nut 8; When anti-bounce-back guard shield 4 rotated to the second place, locking pin 19b rotated to around pivot center O in the transverse groove 20b of L type groove 20, locking pin 19b and 20 engagements of L type groove, and stop the operator to pull down chain guard 7 this moment.Like this, be under the non-safe condition, can prevent that operator's accident from pulling down chain guard 7, thereby prevent that accident from hurting sb.'s feelings at utensil.In addition, lock portion also can directly be installed to the grip portions 4b of anti-bounce-back guard shield 4.Locking pin on the lock portion also can be replaced by L type groove, and the L type groove on the chain guard 7 can be replaced or the like by locking pin.By said structure, the security of utensil improves greatly.

As Figure 14, shown safety guard of the present utility model mechanism.Guide plate 5 has front-end and back-end, and the rear end of guide plate 5 is positioned at the place ahead of sprocket wheel 10, and by nut 8 and chain guard 7 guide plate 5 is fixedly installed on the casing 2.A tip shroud 21 comprises a coupling part 21a and a shield portions 21b, coupling part 21a by fixing tip shroud 21 is to the front end of guide plate 5, tip shroud 21 is fixedly installed on the guide plate 5, the shield portions 21b of tip shroud 21 covers the front end of sawing chain 11, thereby can prevent that the operator from touching the fore-end of sawing chain 11.A dish-type guard shield 22 comprises a coupling part 22a and a shield portions 22b, the rear end of coupling part 22a forms a waist type groove 23, one screw 24 passes this waist type groove 23 dish-type guard shield 22 is fixed on the casing 2, dish-type guard shield 22 is positioned at the top of guide plate 5, thereby the shield portions 22b of dish-type guard shield 22 will cover the chain institute exposed portions on the guide plate 5, thereby can prevent that when utensil rebounded, the operator touched sawing chain 11.In order better dish-type guard shield 22 to be supported, the front end of coupling part 22a also can be fixed on the tip shroud 21 with the fixed form rear end by similar in addition.By waist type groove 23, the user can be along long to axis X direction removable guide 5, thereby realizes the tensioning of chain is regulated.By said structure, the security of utensil improves greatly.

As Figure 14, shown the embodiment of sawing indicating area of the guide plate of the utility model chain saw.The motor 3 of chain saw of the present utility model drives sawing chain 11 and upwards rotatablely moves in the week of guide plate 5, thereby can carry out cutting operation to the workpiece that is positioned at guide plate 5 belows.For the below of pointing out user's guide plate 5 is the sawing zone, thereby allow the operator take care, at guide plate 5 sawing indicating area 5a of part formation near the working region, sawing indicating area 5a can be identified by literal, as " cut-zone " or printed words such as " sawing zones ", perhaps practical figure constitutes as hacures, perhaps also can have the coating that has color to identify this sawing indicating area.By said structure, the security of utensil improves greatly.

Only be wherein several specific embodiment of the present utility model shown in description above and the accompanying drawing, the claimed scope of the utility model is based on claims.By to above describing and the understanding of accompanying drawing, those of ordinary skill in the art is by same mode, and perhaps with through simple form of replacing, non-creativeness ground is simply replaced partial component and is regarded as in the scope that the utility model is protected.

Claims (5)

1. chain saw, comprise: a casing, a motor that is installed in the casing, one by motor-driven sprocket wheel, guide plate with front-end and back-end, a tip shroud is installed on the described guide plate front end, one is used for fixing the guide plate rear end and is installed to sawing chain cover plate on the casing, a sawing chain that is installed on sprocket wheel and the guide plate, an anti-bounce-back guard shield, it is characterized in that described chain saw also comprises a dish-type guard shield with front-end and back-end, the rear end of described dish-type guard shield is installed on the casing.

2. chain saw as claimed in claim 1 is characterized in that: the rear end of described dish-type guard shield detachably is installed on the casing.

3. chain saw as claimed in claim 2 is characterized in that: the rear end of described dish-type guard shield forms a waist type groove, and a screw passes described waist type groove.

4. chain saw as claimed in claim 2 is characterized in that: the front end of described dish-type guard shield is connected on the tip shroud.

5. chain saw as claimed in claim 3 is characterized in that: the front end of described dish-type guard shield is detachably attached on the tip shroud.

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