CN102430811B - Handheld chain saw - Google Patents
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- CN102430811B CN102430811B CN 201010512501 CN201010512501A CN102430811B CN 102430811 B CN102430811 B CN 102430811B CN 201010512501 CN201010512501 CN 201010512501 CN 201010512501 A CN201010512501 A CN 201010512501A CN 102430811 B CN102430811 B CN 102430811B
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Abstract
The invention discloses a handheld chain saw which comprises a shell, a chain wheel arranged in the shell and used for driving a saw chain and a chain plate for guiding the movement of the saw chain, wherein the chain plate extends out of the shell along the longitudinal direction and can longitudinally move in relative to the shell. The chain saw also comprises a saw chain tension device, wherein the saw chain tension device comprises a force bearing piece arranged on the chain plate, an active piece for driving the force bearing piece so as to make the force bearing piece drive the chain plate to move longitudinally, a rotating device for driving the active piece and a transmission device arranged between the rotating device and the active piece. The transmission device comprises a clamping joint piece arranged on the rotating device, a rotating piece in one-way meshed transmission with the clamping joint piece and a friction clutch device including mutually sheathed first friction piece and second friction piece. The saw chain tension device can enable the saw chain to be tensioned and the chain plate to be compressed at the same time, and can also be used to effectively prevent the looseness of the chain plate after chain plate tensioning. The saw chain tension device has the advantages of labor-saving performance in operation, good structure stability and low manufacturing cost.
Description
Technical field
The present invention relates to a kind of chain saw, especially a kind of hand-held type chain saw with chain tension adjusters.
Background technology
European patent application publication No. EP2036688A2 discloses a kind of single hand wheel that utilizes and has carried out tensioning saw chain and guide plate compression, but need to counter-rotate the saw chain structure of another handwheel when changing saw chain.This chain saw comprises that is rotatably supported in a sprocket wheel in the housing and that be used for the saw chain that guided at carrier bar, a tension assembly that is used for the tensioning chain saw, this tension assembly comprises the arbor wheel mechanism that carrier bar is vertically moved, this arbor wheel mechanism is provided with the reverse rotation operation of the ribbed leg of surperficial tool when being convenient for changing saw chain, one side of this arbor wheel mechanism is provided with the helicla flute that is meshed with the carrier bar projection, so that thereby helicla flute promotes projection and moves and drive carrier bar and vertically move the tensioning saw chain to hull outside when rotating this arbor wheel mechanism, the relative spiral fluted opposite side of arbor wheel mechanism is provided with open tubular column, this open tubular column surface is centered on by an annular clutch part, the outer cover of this annular clutch part is provided with slip ring, this slip ring is rotated by a ring spring unidirectional drive, and the driving wheel that is provided with the key tooth cooperates with handwheel key tooth and is used for manual rotation and makes the drive wheel ring spring drive the slip ring rotation.Slip ring, annular clutch part and open tubular column three are socketed mutually, wherein annular clutch part in enclose face, peripheral surface and enclose the face friction engagement respectively with in open tubular column peripheral surface and the slip ring, thereby form the friction clutch mechanism of a cover transmitting torque.When being rotated in the forward handwheel, utilized the characteristic of ring spring, thereby ring spring can be held slip ring tightly moment of torsion is passed to arbor wheel by friction clutch mechanism, and reverse rotation is during handwheel, ring spring is inoperative to slip ring, namely can't make slip ring rotate transmitting torque, need enclosing arm and could discharging saw chain of reverse rotation arbor wheel mechanism this moment.Because tensioning saw chain and replacing saw chain need to be regulated different handwheels, tension structure is complicated, inconvenient operation.
Summary of the invention
For the deficiencies in the prior art, the technical problem to be solved in the present invention provides a kind of hand-held type chain saw of saw chain tension rapid operation.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that a kind of hand-held type chain saw, comprise housing, be arranged in the described housing and be used for driving the sprocket wheel of saw chain and one and be the carrier bar of described saw chain motion guide, carrier bar extends longitudinally out described hull outside, and can vertically move by relatively described housing, this chain saw comprises a chain tension adjusters, wherein, chain tension adjusters comprises that one is arranged at the stressed member on the described carrier bar, with the driving link that drives described stressed member, thereby making stressed member drive carrier bar vertically moves, drive the tumbler of described driving link, and be arranged between tumbler and the driving link and be provided with transmission device, described transmission device comprises the shackle member that is arranged at tumbler, and with the tumbler of shackle member one way engagement transmission, and comprise the first friction member of mutual socket and the friction engaging and disengaging gear of the second friction member.
Described driving link is set to eccentric wheel, and described stressed member is arranged to mesh the stopper that connects with the eccentric wheel cam surface.Described tumbler comprises a closing sleeve and a static handwheel relative to this closing sleeve, is provided with the butting section on the described handwheel.Described transmission device further comprises pedestal, and described pedestal is provided with connector, locking device and the annular flange flange of connecting eccentric wheel.Described chain saw further comprises be used to settling described tensioning apparatus also to be used for the guard shield of closure casing, guard shield opening with profile of tooth end face is set on the described guard shield, and described locking device comprises with the profile of tooth end face can select the toothed member that meshes and the slope that connects with the handle butting section.
Described locking device is made by the material that can produce strain.
Described tumbler is arranged to pivoted housing, and the periphery of described pivoted housing is provided with the oblique latch with the shackle member engagement.At least one friction member is provided with inside and outside surface in described first, second friction member, and this friction member only has a surface to be arranged to rubbing surface and another friction member produces friction.
The inner peripheral surface of described pivoted housing is arranged to rubbing surface, and described friction member with inside and outside surface is fixedly sleeved in the annular flange flange of pedestal, and the outer surface of described friction member is arranged to rubbing surface and the pivoted housing inner peripheral surface circumferentially meshes.
In another embodiment, described friction member with inside and outside surface is fixedly sleeved in pivoted housing, and the outer surface that the inner surface of this friction member is arranged to rubbing surface and annular flange flange circumferentially meshes.
Hand-held type chain saw of the present invention has in the tensioning saw chain carrier bar of compression, and rapid operation, good stability, manufacturing cost are relatively low.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is the partial front elevation view of chain saw after guard shield moves among the present invention.
Fig. 2 is the tensioning apparatus cutaway view of chain saw among the present invention.
Fig. 3 is the perspective exploded view of tensioning apparatus first state of chain saw among the present invention.
Fig. 4 is the perspective exploded view of tensioning apparatus second state of chain saw among the present invention.
Fig. 5 be among the present invention the frictional force arrangement of clutch overlook the direction schematic diagram.
Fig. 6 is the handwheel engagement rotary sleeve schematic perspective view of chain saw among the present invention.
Fig. 7 is the perspective exploded view of the second embodiment of chain saw tensioning device of the present invention.
Wherein:
5 chain saw 19b mating part 155a slopes
6 housings, 27 rotary sleeves, 151 handwheels
7 sprocket wheel 27b inner peripheral surfaces, 152 closing sleeves
9 carrier bars, 29 stage clips, 153 central axis
10 friction engaging and disengaging gears, 31 pedestals, 160 screws
11 saw chains, 33 eccentric wheels, 161 torsion springs
13 guard shield 33a cam surfaces, 162 connectors
15 tumbler 33b through hole connecting portions, 273 oblique latches
16 shackle member, 35 briquettings, 300 annular flange flange
16a Access Division 36 back-up rings, 302 openings
310 perforates of 17 top boards, 37 bolts
17a perforate 37a external thread part 311 connectors
17c notch 93 elongated hole 312a slopes
18 screws, 131 guard shield opening 312b toothed members
19C shape elastic component 132 profile of tooth end faces 313 connectors
19 ' annular element 152a internal thread part, 330 transmission mechanisms
The specific embodiment
With reference to shown in Figure 1, the chain saw 5 that the specific embodiment of the invention relates to comprises a housing 6, sprocket wheel 7 rotating this housings 6 that are bearing in that are used for driving saw chain 11, wherein, this sprocket wheel 7 drives the rotation (not shown) by a transmission device by power set, and this Power Drive Unit can be set to motor or engine.This chain saw 5 also comprises a carrier bar 9, and these carrier bar 9 one end bearings are in housing 6, and the other end extends this housing 6 at these carrier bar 9 longitudinal directions, and saw chain 11 is set on described sprocket wheel 7 and the carrier bar 9, and can being directed along this carrier bar 9 edges circulation.In order to regulate the tension force of saw chain 11, this carrier bar 9 can move relative to described housing 6 along these carrier bar 9 longitudinal extension directions, so that the gap variableization between this carrier bar 9 and the sprocket wheel 7 is big or small, thereby so that described saw chain 11 can be tensioned or lax.
With further reference to Fig. 2, Fig. 3 and Fig. 4, one that is fixed on the housing 6 for tensioning saw chain 11 and with carrier bar 9 is suitable for adjusting on the position of saw chain 11 tensile forces, this chain saw 5 is provided with a chain tension adjusters, and this tensioning apparatus is placed in a guard shield 13 that is used for closure casing 6.Wherein, this tensioning apparatus comprises one near the tumblers 15 that carrier bar 9 arranges and 33, one of movable eccentric wheels are controlled and driving eccentric wheel 33 moves, and transmission mechanism 330, and wherein transmission mechanism comprises friction engaging and disengaging gear 10; The cam surface 33a of eccentric wheel 33 abuts against a stopper 91 that is fixedly connected on carrier bar 9, when operation tumbler 15 rotates described eccentric wheel 33, this eccentric wheel 33 is against described stopper 91 and promote stopper 91 along described carrier bar 9 longitudinal extension directions towards housing 6 outer movements, described stopper 91 drive carrier bars 9 move towards leaving housing 6 directions along carrier bar 9 longitudinal extension directions immediately, so that carrier bar 9 is away from sprocket wheel 7, thus the described saw chain 11 of tensioning.Wherein eccentric wheel 33 can be configured to other forms such as worm gear, gear, as long as the worm screw that described stopper 91 also can be configured to cooperate with worm gear, gear, tooth bar etc. are can be so that described tumbler 15 orders about described carrier bar 9 by transmission device moves relative to described housing 6 along these carrier bar 9 longitudinal extension directions.
In best mode for carrying out the invention, tumbler 15 comprise a closing sleeve 152 with one with these closing sleeve 152 relative static handwheels 151, described closing sleeve 152 has a central axis 153, described friction engaging and disengaging gear 10 is coupled on the closing sleeve 152 with eccentric wheel 33, and eccentric wheel 33 turning cylinder center lines are coaxial with closing sleeve 152 central axis 153.Closing sleeve 152 inside have internal thread part 152a, be provided with bolt 37 on the housing 6, bolt 37 arranges external thread part 37a, housing 6 is fixed in the one end, vertical this housing 6 of the other end stretches out and passes and is arranged at carrier bar 9 along the elongated hole 93 of carrier bar 9 longitudinal extensions, closing sleeve 152 connects by its internal thread part 152a and bolt 37 external thread part 37a engagement, and closing sleeve 152 relative carrier bars 9 vertically arrange.Wherein, closing sleeve 152 is arranging briquetting 35 near carrier bar 9 one ends, this briquetting 35 is used for carrying out spacing to eccentric wheel 33 between friction engaging and disengaging gear 10 and carrier bar 9, and after saw chain 11 tensionings, carrier bar 9 is compressed to keep the rate of tension of saw chain 11, so that in the course of the work, saw chain 11 can not relax because of the vibrations of chain saw 5, to user's cause danger.Simultaneously, also be fixed with back-up ring 36 near on the end of briquetting 35 on the closing sleeve 152, this back-up ring 36 is used for spacing described briquetting 35, deviates from from this closing sleeve 152 to prevent this briquetting 35, guarantees the stability of structure.The other end of closing sleeve 152 is surrounded by relative closing sleeve 152 static handwheels 151, operates for the convenience of the user this closing sleeve 152, and closing sleeve 152 and handwheel 151 chimeric connecting drive closing sleeve 152 when guaranteeing handwheel 151 rotation and move together.In addition, be provided with the leg 155 of circumferential setting in the inboard of handwheel 151, the terminal part of described leg 155 forms slope 155a.
The closing sleeve 152 of tumbler 15 passes on the guard shield 13 the guard shield opening 131 with the circle of closing sleeve 152 coaxial settings, and handwheel 151 and these guard shield opening 131 form fit, so that the leg 155 of handwheel 151 embeds in the described guard shield opening 131, the housing section of handwheel 151 protrudes from the outside of guard shield 13, in addition, the bottom of this guard shield opening 131 is provided with the profile of tooth end face 132 that circumferentially arranges along guard shield opening 131.When being rotated in the forward tumbler 15, handwheel 151 drives closing sleeve 152 and rotates relative to guard shield 13, can carry out easily the operation of tensioning saw chain by transmission mechanism 330, friction engaging and disengaging gear 10 and eccentric wheel 33.Being rotated in the forward of indication is relatively reverse rotation herein, is rotated in the forward the positive hour hands direction of rotation that is often referred to tumbler 15 relative chain saw housings 6, and on the contrary, reverse rotation is often referred to the direction that is rotated counterclockwise of tumbler 15 relative chain saw housings 6; Certainly those skilled in the art also can do opposite understanding with above-mentioned forward and reverse rotation.
As shown in Figure 3, Figure 4, described friction engaging and disengaging gear 10 comprises pedestal 31, rotary sleeve 27, C shape friction member 19, stage clip 29; Wherein, pedestal 31 is being provided with connector 313 near described eccentric wheel 33 1 sides, this connector 313 and pedestal 31 are configured to one, and cooperate the through hole connecting portion 33b on the described eccentric wheel 33 to connect described eccentric wheel 33, so that behind the described eccentric wheel 33 of connector 313 connections, eccentric wheel 33 can keep relative static with connector 313.Pedestal 31 is provided with the annular flange flange 300 of extending to rotation hand wheel 151 directions in a side end face of described eccentric wheel 33 dorsad, the outer surface of annular flange flange 300 offers opening 302, annular flange flange 300 inboards arrange at least one connector 311, in best mode for carrying out the invention, this pedestal 31 is provided with three connectors 311 altogether, and each connector 311 all is configured to a cannulated threaded post.C shape friction member 19 outer surfaces are arranged to rubbing surface, two inside kink 19a of terminal formation that the opening part of C shape friction member 19 is adjacent, C shape friction member 19 is sheathed on the outer surface of pedestal 31 annular flange flange 300, and two relative kink 19a are engaged in respectively in the opening 302 on annular flange flange 310 surfaces on the C shape friction member 19, thereby so that C shape friction member 19 relative pedestals 31 be fixedly connected with; Rotary sleeve 27 is provided with top board 17, the outer circumference surface of rotary sleeve 27 is provided with oblique latch 273, the outer surface engagement that the inner peripheral surface 27b of rotary sleeve 27 is arranged to rubbing surface and C shape friction member 19 produces tangential friction force, and rotary sleeve 27 just forms friction pair with C shape friction member 19 like this.Top board 17 passes the connecting hole 17b that arranges on it and cooperates with connector 311 by screw 18, thereby C shape friction member 19 is contained between rotary sleeve 27 and the pedestal 31.Stage clip 29 is sheathed on the closing sleeve 152, the top board 17 of one end bias voltage rotary sleeve 27, and other end bias voltage handwheel 151, thus so that overcoming the relative closing sleeve 152 of stage clip 29 active forces, friction engaging and disengaging gear 10 produces certain axial displacement along central axis 153.Be equipped with the perforate 17a coaxial with the central axis 153 of closing sleeve 152 on pedestal 31, the top board 17, be connected with bolt 37 after making closing sleeve 152 pass pressing plate 17 perforate 17a and pedestal 31 perforates 310.
With reference to shown in Figure 5, the main part of pedestal 31 is provided with the locking device 312 that a plurality of edges circumferentially evenly arrange, locking device 312 quantity are provided with three in the present embodiment, the slope 312a that protrudes to handwheel 151 directions all is set on each locking device 312, and this slope 312a selectively compresses with the slope 155a that is arranged at handwheel 151 legs 155 and connects; In addition, the same side of each slope 312a is provided with toothed member 312b, this toothed member 312b selectively connects with profile of tooth end face 132 engagements that are arranged at guard shield opening 131, toothed member 312b quantity in the present embodiment is provided with two, is arranged at that the toothed member 312b of pedestal 31 and leg 155 made by the material that can produce strain.
As shown in Figure 3, Figure 4, carry out tensioning and carrier bar 9 is pressed in housing 6 for driving easily 10 pairs of saw chains of friction engaging and disengaging gear 11 when being rotated in the forward handwheel 151, and when reverse rotation handwheel 151 lax described saw chain 11, need not overcome stronger frictional force, transmission mechanism 330 is arranged to one-way driving mechanism.Handwheel 151 inboards are connected with at least one shackle member 16 by screw 160, shackle member 16 in the present embodiment is provided with three, this shackle member 16 is provided with Access Division 16a and is used for and rotary sleeve 27 peripheral tiltedly latch 273 one way engagement, for shackle member 16 being connected in handwheel 151 medial surfaces, at handwheel 151 medial surfaces corresponding connector 162 is set, shackle member 16 is connected on the connector 162 by screw 160, wherein be provided with torsion spring 161 between connector 162 and the shackle member 16, this torsion spring 161 can be given elastic force towards handwheel 151 centers of Access Division 16a of described shackle member 16, so that when handwheel 151 connects described friction engaging and disengaging gear 10, the Access Division 16a of this shackle member 16 can mesh with the oblique latch 273 unidirectional clampings of described rotary sleeve 27 peripheries, thereby between tumbler 15 and friction engaging and disengaging gear 10, form single-direction transmission, be 273 rotations of the oblique latch of shackle member 16 unidirectional drives, and shackle member 16 is with motionless oblique latch 273 rotations during reverse rotation.This unidirectional transmission is so that when being rotated in the forward described tumbler 15, handwheel 151 drives this shackle member 16 rotations, and shackle member 16 drives described rotary sleeve 27 rotations.Utilize the friction force between C shape friction member 19 corrugated outer walls and the rotary sleeve 27 inner peripheral surface 27b, rotary sleeve 27 drives 19 rotations of C shape friction member, because C shape friction member 19 relative pedestals 31 are fixedly installed, therefore C shape friction member 19 drives pedestal 31 rotations, thereby so that be coupled to eccentric wheel 33 rotations of pedestal 31 connectors 313, eccentric wheel 33 makes stopper 91 drive carrier bar 9 against described stopper 91 and moves towards leaving housing 6 directions along carrier bar 9 longitudinal extension directions, thereby carrier bar 9 is away from sprocket wheel 7 tensioning saw chains 11.When changing saw chain 11, reverse rotation tumbler 15, the Access Division 16a of shackle member 16 is creeped at this oblique latch 273, rotary sleeve 27 keeps static and the 152 continuation reverse rotations of handwheel 151 drive closing sleeves at this moment, unclamp and break away from and be arranged at the engagement of the bolt 37 of housing 6 when closing sleeve 152, can dismantle together with tensioning apparatus guard shield 13 this moment from chain saw 5.
By adopting said structure, saw chain 11 tensionings of chain saw 5 of the present invention and carrier bar 9 compresses and is achieved in that when the user takes chain saw 5 and needs tensioning saw chain 11, the guard shield 13 that at first will be connected with tumbler 15 is buckled in the relevant position on the described housing 6, closing sleeve 152 and the bolt 37 that is arranged at housing 6 and passes carrier bar 9 elongated holes 93 are connected, the forward rotation handwheel 151 again, making handwheel 151 drive described closing sleeve 152 threaded engagement also relative carrier bar 9 on described bolt 37 moves axially, meanwhile, this handwheel 151 cooperates by the shackle member 16 Access Division 16a of connection on it and the oblique latch 273 of rotary sleeve 27 peripheries, driven rotary cover 27 rotates synchronously, so that rotary sleeve 27 by and C shape friction member 19 between friction drive C shape friction member 19 and rotate synchronously with pedestal 31, pedestal 31 band is dynamically connected, and eccentric wheel 33 on it rotates synchronously and effect carrier bar 9 vertically moves, saw chain 11 beginning tensionings.At this moment, the tensile force of saw chain 11 is less than the frictional force of friction engaging and disengaging gear 10 generations that set in advance in factory.Be rotated further handwheel 151, when saw chain 11 tensionings have reached behind the optimum tensile force that factory sets in advance, saw chain 11 tensionings are finished.At this moment, the tensile force of saw chain 11 forms a binding force to the reaction force of carrier bar 9, this binding force is delivered on the eccentric wheel 33 that cooperates with this stopper 91 by the stopper 91 that arranges on the carrier bar 9, and further is delivered on the friction engaging and disengaging gear 10 that is arranged between eccentric wheel 33 and the tumbler 15.After saw chain 11 is finished tensioning, this reaction force size has surpassed above-mentioned friction clutch power, continue rotation hand wheel 151, friction clutch 10 is affected the reaction force that eccentric wheel 33 produces by tensile force, carries out clutch, in the present embodiment, skid between pivoted housing 27 inner peripheral surface 27b and C shape friction member 19 outer walls, thereby so that pedestal 31 stops operating, eccentric wheel 33 keeps static, and saw chain 11 rates of tension remain unchanged.Handwheel 151 continues rotation and thereby the briquetting 35 that drives closing sleeve 152 and be connected in closing sleeve 152 continues to move to carrier bar 9 directions and compresses carrier bar 9.Under the effect of thrust, intermeshing and the mutual extruding of slope 155a of the slope 312a on the locking device 312 and handwheel 151 interior side enclosure wall 155, cause locking device 312 radially outward to produce strain, and toothed member 312b just in time is being meshed with the profile of tooth end face 132 that is arranged at guard shield opening 131 in the radial direction, thereby form another ratchet device, namely when handwheel 151 rotates to tensioning carrier bar 11 and compresses the state of carrier bar 11, friction engaging and disengaging gear 10 is just automatically locked together with guard shield 13, thereby has guaranteed that carrier bar 9 can not get loose in the course of the work.
It is to be noted, above-mentioned chain tension adjusters is in the tensioning process, the operator carries out blind dress, and namely the operator only needs the closing sleeve 152 of tumbler 15 is threadedly connected on the bolt 37, and need not the cam surface 33a of eccentric wheel 33 is aimed at stopper 91.Because stopper 91 puts in place even without contacting with the cam surface 33a of eccentric wheel 33 in installation process, may just contact with the end face of eccentric wheel 33, but when closing sleeve 152 is threadedly connected to bolt 37, stage clip 29 can produce elastic compression to handwheel 151 directions, as long as handwheel 151 drives closing sleeve 152 relative bolt 37 rotations, eccentric wheel 33 just produces corresponding the rotation thereupon, when the cam surface 33a of eccentric wheel 33 turns to the position that is meshed with stopper 91, under stage clip 29 active forces, friction engaging and disengaging gear 10 is displacement away from handwheel 151 directions of 153 generations in closing sleeve 152 along central axis, and eccentric wheel 33 cam surface 33a and stopper 91 can automatically mesh and put in place this moment.Adopt this mounting means, the job step that need to aim at when having saved saw chain 11 tensioning has improved operating efficiency widely.
And when needs more during saw chain, reverse rotation tumbler 15 drives closing sleeve 152 produces relative compaction direction on bolt 37 displacement, so that the slope 155a of handwheel 151 interior side enclosure wall 155 and the slope 312a on the locking device 312 throw off engagement, locking device 312 recovers strain, the engagement of the profile of tooth end face 132 of the at this moment automatic disengagement of the toothed member 312b on the locking device 312 and guard shield opening 131, namely anti-loose structure has automatically terminated locking; Continue backward rotation handwheel 151 this moment, until closing sleeve 152 breaks away from the bolt 37 that is arranged at housing 6, this moment, guard shield 13 can shirk from chain saw 5 together with tensioning apparatus.
Friction engaging and disengaging gear 10 is the revolving joints that are arranged between this tumbler 15 and the eccentric wheel 33, because the annular flange flange 300 of C shape friction member 19 relative pedestals 31 is fixedly connected with, so that thereby friction engaging and disengaging gear 10 produces the tensioning that friction clutch power realizes saw chain 11 by C shape friction member 19 and rotary sleeve 27 single faces, this friction member structure requirement on machining accuracy that utilizes C shape friction member 19 single faces to produce friction clutch power is low, convenient processing and manufacturing, consequent manufacturing cost also reduces greatly.When making in factory in advance corresponding to saw chain 11 required best chain tensions, friction engaging and disengaging gear 10 required friction clutch power just adjust, feel irrelevant with user's individual, therefore, friction engaging and disengaging gear 10 can guarantee that saw chain 11 always has identical saw chain tension power after having operated saw chain tension.
With reference to shown in Figure 7, be the second embodiment of the present invention, in order to express easily, the structure identical with the first embodiment adopts identical numbering to represent, do not give unnecessary details herein.In the present embodiment, annular friction spare 19 ' institute has replaced C shape friction member 19, offer notch 17c on the top board 17 of pivoted housing 27, the peripheral wall of annular friction spare 19 ' is provided with the mating part 19b with notch 17c engagement, the engagement by notch 17c and mating part 19b so that annular friction spare 19 ' relative pivoted housing 27 be fixedly connected with.Annular friction spare 19 ' is sheathed on pedestal 31 annular flange flange 300, so that produce tangential friction force between the inner surface of the annular friction spare 19 ' of friction engaging and disengaging gear 10 ' and annular flange flange 300 outer surfaces, be that annular friction spare 19 ' forms a friction pair with pedestal annular flange flange 300, annular friction spare wherein 19 ' can be made by corrugated steel, also available working of plastics or other material are made, annular friction spare 19 ' inner surface be arranged to that corrugated is conducive to design and annular flange flange 300 between frictional force.Certainly, the best frictional force of friction engaging and disengaging gear 10 ' be design in advance according to the required tensile force of saw chain tension fixed.
Certainly, those skilled in the art it is also contemplated that the structure of the friction engaging and disengaging gear 10 among the present invention is done some changes, the kink 19a that C shape friction member 19 in for example can the first embodiment extends internally is arranged to outward extending kink, be provided with corresponding mating part at rotary sleeve 27, thereby by kink and being connected of mating part the position of C shape friction member 19 with rotary sleeve 27 being fixed, C shape friction member 19 madial walls and pedestal 31 annular flange flange 300 outer surfaces produce single-sided friction like this.The rubbing surface of C shape friction member 19 can also be arranged to shiny surface or other form has the surface except being arranged to the corrugated male and fomale(M﹠F).Can be integrally formed with pivoted housing 27 with the annular friction spare 19 ' among the second embodiment, perhaps directly the inner peripheral surface 27b of pivoted housing 27 is arranged rubbing surface and produce single-sided friction for the transmission tensioning with annular flange flange 300 surfaces.
Claims (10)
1. hand-held type chain saw comprises:
Housing;
Be arranged in the housing and be used for driving the sprocket wheel of saw chain;
Be the carrier bar of described saw chain motion guide, described carrier bar extends longitudinally out described hull outside, and can vertically move by relatively described housing;
And chain tension adjusters, described chain tension adjusters comprises the stressed member that is arranged at carrier bar, drive described stressed member and drive the driving link that carrier bar vertically moves, drive the tumbler of described driving link, and be arranged between tumbler and the driving link and be provided with transmission device;
It is characterized in that: described transmission device comprises the shackle member that is arranged at tumbler, with the tumbler of shackle member one way engagement transmission, and comprises the first friction member of mutual socket and the friction engaging and disengaging gear of the second friction member.
2. hand-held type chain saw according to claim 1, it is characterized in that: described driving link is set to eccentric wheel, and described stressed member is arranged to the stopper that connects with the engagement of eccentric wheel cam surface.
3. hand-held type chain saw according to claim 1, it is characterized in that: described tumbler comprises a closing sleeve and a static handwheel relative to this closing sleeve, is provided with the butting section on the described handwheel.
4. hand-held type chain saw according to claim 1, it is characterized in that: described transmission device further comprises pedestal, described pedestal is provided with connector, locking device and the annular flange flange of connecting eccentric wheel.
5. hand-held type chain saw according to claim 1, it is characterized in that: described chain saw further comprises be used to settling described tensioning apparatus also to be used for the guard shield of closure casing, guard shield opening with profile of tooth end face is set on the described guard shield, and described locking device comprises with the profile of tooth end face can select the toothed member that meshes and the slope that connects with the handle butting section.
6. hand-held type chain saw according to claim 5, it is characterized in that: described locking device is made by the material that can produce strain.
7. hand-held type chain saw according to claim 5, it is characterized in that: described tumbler is arranged to pivoted housing, and the periphery of described pivoted housing is provided with the oblique latch with the shackle member engagement.
8. hand-held type chain saw according to claim 7, it is characterized in that: at least one friction member is provided with inside and outside surface in described first, second friction member, wherein only has a surface to be arranged to rubbing surface and another friction member produces friction.
9. hand-held type chain saw according to claim 8, it is characterized in that: the inner peripheral surface of described pivoted housing is arranged to rubbing surface, described friction member with inside and outside surface is fixedly sleeved on the annular flange flange of pedestal, and described outer surface with the friction member on inside and outside surface is arranged to rubbing surface and the pivoted housing inner peripheral surface circumferentially meshes.
10. hand-held type chain saw according to claim 7 is characterized in that: described friction member with inside and outside surface is fixedly sleeved in pivoted housing, and the outer surface that the inner surface of annular friction spare is arranged to rubbing surface and annular flange flange circumferentially meshes.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010512501 CN102430811B (en) | 2010-09-29 | 2010-09-29 | Handheld chain saw |
| PCT/CN2011/080139 WO2012041192A1 (en) | 2010-09-29 | 2011-09-24 | Chain saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010512501 CN102430811B (en) | 2010-09-29 | 2010-09-29 | Handheld chain saw |
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| Publication Number | Publication Date |
|---|---|
| CN102430811A CN102430811A (en) | 2012-05-02 |
| CN102430811B true CN102430811B (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010512501 Active CN102430811B (en) | 2010-09-29 | 2010-09-29 | Handheld chain saw |
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| CN (1) | CN102430811B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106508449B (en) * | 2016-09-13 | 2022-04-29 | 天津迈克重工有限公司 | Hydraulic oil saw accessory head |
| CN107414184B (en) * | 2017-08-28 | 2023-06-13 | 浙江动一新能源动力科技股份有限公司 | Chain board compaction structure of chain saw and chain saw |
| CN110640843A (en) * | 2019-10-18 | 2020-01-03 | 常州格力博有限公司 | Chain saw |
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| US6032373A (en) * | 1996-09-05 | 2000-03-07 | Peterson; Robin A. | Methods and apparatus for adjusting chain saw tension |
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|---|---|---|---|---|
| US3834183A (en) * | 1972-01-12 | 1974-09-10 | Stihl Maschf Andreas | Drive clutch |
| US6032373A (en) * | 1996-09-05 | 2000-03-07 | Peterson; Robin A. | Methods and apparatus for adjusting chain saw tension |
| US6575285B2 (en) * | 2001-11-14 | 2003-06-10 | Jenn Feng Industrial Co., Ltd. | Safety switch for power tools |
| CN101745696A (en) * | 2008-12-16 | 2010-06-23 | 苏州宝时得电动工具有限公司 | Chain saw |
| CN201881006U (en) * | 2010-09-29 | 2011-06-29 | 苏州宝时得电动工具有限公司 | Handheld chain saw |
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