CN102430810B - Chain saw with saw chain tension device - Google Patents
Chain saw with saw chain tension device Download PDFInfo
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- CN102430810B CN102430810B CN 201010512490 CN201010512490A CN102430810B CN 102430810 B CN102430810 B CN 102430810B CN 201010512490 CN201010512490 CN 201010512490 CN 201010512490 A CN201010512490 A CN 201010512490A CN 102430810 B CN102430810 B CN 102430810B
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Abstract
The invention discloses a chain saw with a saw chain tension device. The chain saw comprises a shell, a chain wheel arranged in the shell and used for driving a saw chain, a chain plate for guiding the movement of the saw chain, a protective hood covering the chain wheel and partial chain plate and a saw chain tension device, wherein the saw chain tension device comprises a force bearing piece connected with the chain plate, an active piece for driving the force bearing piece so as to drive the chain plate to move longitudinally, a rotating device for driving the active piece and a transmission mechanism arranged between the rotating device and the active piece; the protective hood is provided with a first meshing part; the rotating device is provided with an abutting part; the transmission mechanism is provided with an anti-looseness device, and the anti-looseness device comprises an acting part selectively meshed with the abutting part and a second meshing part selectively matched and locked with the first meshing part; and the transmission mechanism further comprises a friction clutch device, the friction clutch device comprises mutually sheathed first friction piece and second friction piece, and a radial friction force is generated between the first friction piece and the 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 the looseness of the chain plate after tensioning can be effectively prevented. The saw chain tension device has the advantages of labor-saving performance in operation and good structure stability.
Description
Technical field
The present invention relates to a kind of chain saw, especially a kind of 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 comprise one be rotatably supported in housing and for the sprocket wheel of the saw chain that guided on carrier bar, a tension assembly 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 be 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 while 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 by an annular clutch part institute around, the outer cover of this annular clutch part is provided with slip ring, this slip ring is rotated by a ring spring unidirectional drive, the driving wheel that is provided with the key tooth coordinates for manual rotation and makes the drive wheel ring spring drive the slip ring rotation with handwheel key tooth.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 slip ring.Wherein annular clutch part is the annular interference clutch part of being made by corrugated steel, the default moment of torsion of this annular clutch part energy transmission, and when moment of torsion reaches or exceed this default evaluation, annular clutch part can skid.Due to anti-loose structure not being set in this tension assembly, make chain saw become loosening state because the factors such as vibration make carrier bar by impaction state when normal operating, cause saw chain come off and cause danger from carrier bar.
Summary of the invention
For the deficiencies in the prior art, the technical problem to be solved in the present invention is to provide a kind of chain saw of improvement, and this chain saw has the chain tension adjusters of good stability.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that a kind of chain saw, comprise housing, be arranged in housing and for driving the sprocket wheel of saw chain, carrier bar for described saw chain motion guide, described carrier bar extends longitudinally out described hull outside, and housing vertically moves relatively, for covering the guard shield of sprocket wheel and at least part of carrier bar, part is contained in the chain tension adjusters of guard shield, described chain tension adjusters comprises the stressed member that is arranged at carrier bar, drive described stressed member to drive the driving link that carrier bar vertically moves, drive the tumbler of described driving link, be arranged at the transmission mechanism between tumbler and driving link, establish the first engaging piece on described guard shield, described tumbler is provided with butting section, described transmission mechanism is provided with locking device, described locking device comprises with butting section can select the service portion connected, and can select the second fixed engaging piece of engaging lock with the first engaging piece, described transmission mechanism further comprises friction engaging and disengaging gear, described friction engaging and disengaging gear comprises mutual socket the first friction member and the second friction member, described first, produce radial frictional force between the second friction member.
Described locking device is made by the material that can produce strain.Described tumbler comprises handwheel and static closing sleeve relative to handwheel, and described closing sleeve has a central axis, and described first, second friction member and driving link are coupled on described closing sleeve and with the closing sleeve central axis and coaxially arrange.The inboard of described handwheel has the leg of circumferential setting, and described butting section is the slope that is arranged at the leg end.Be provided with circular open on described guard shield, described handwheel and circular open form fit, described the first engaging piece is the profile of tooth end face circumferentially arranged along circular open.Be provided with bolt on described housing, described closing sleeve inside has internal thread part, and described bolt is threaded with closing sleeve.Described transmission device comprises the shackle member that is connected in the handwheel inboard, and a pivoted housing, and described pivoted housing periphery is provided with oblique latch, and institute's shackle member and oblique latch engagement connect unidirectional drive pivoted housing and synchronize and rotate.
Described pivoted housing is set to the first friction member, the inner peripheral surface of described pivoted housing is arranged to rubbing surface, described transmission device comprises a pedestal, be fixedly installed the annular flange flange that oriented the first friction member extends on described pedestal, described the second friction member is the annular friction part that is fixedly installed on annular flange flange, and described pivoted housing inner peripheral surface and annular friction part outer surface circumferentially mesh.
Described the first friction member is the annular element that is fixedly installed on the pivoted housing inboard, and described transmission device comprises a pedestal, and described the second friction member is the annular flange flange that is fixedly installed on pedestal, the outer surface friction engagement of the inner surface of described annular element and annular flange flange.
Described locking device is arranged on described pedestal, and described service portion is the slope protruded to the handwheel direction, and described the second engaging piece is toothed member.
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.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the partial front elevation view of chain saw after guard shield moves in the present invention.
Fig. 2 is the tensioning apparatus cutaway view of chain saw in the present invention.
Fig. 3 is the perspective exploded view of tensioning apparatus first state of chain saw in the present invention.
Fig. 4 is the perspective exploded view of tensioning apparatus second state of chain saw in the present invention.
Fig. 5 be in 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 in 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 housing 27 rotary sleeve 151 handwheels
7 sprocket wheel 27b inner peripheral surface 152 closing sleeves
9 carrier bar 29 stage clip 153 central axis
10 friction engaging and disengaging gear 31 pedestal 160 screws
11 saw chain 33 eccentric wheel 161 torsion springs
13 guard shield 33a cam surface 162 connectors
The oblique latch of 15 tumbler 33b through hole connecting portion 273
16 shackle member 35 briquetting 300 annular flange flange
16a Access Division 36 back-up ring 302 openings
17 top board 37 bolt 310 perforates
17a perforate 37a external thread part 311 connectors
17c notch 93 elongated hole 312a slopes
18 screw 131 guard shield opening 312b toothed members
19C shape elastic component 132 profile of tooth end face 313 connectors
19 ' annular element 152a internal thread part 330 transmission mechanisms
The specific embodiment
Shown in Fig. 1, the chain saw 5 that the specific embodiment of the invention relates to comprises a housing 6, one for rotating this housing 6 that is bearing in of the sprocket wheel 7 that drives 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 carrier bar 9, and can be along the 9 edges circulations of this carrier bar directed.In order to regulate the tension force of saw chain 11, this carrier bar 9 can move relative to described housing 6 along this carrier bar 9 direction extending longitudinally, makes the gap variable size between this carrier bar 9 and sprocket wheel 7, thereby makes described saw chain 11 to be tensioned or relax.
With further reference to Fig. 2, Fig. 3 and Fig. 4, for tensioning saw chain 11 that carrier bar 9 is fixed on housing 6 are 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 for closure casing 6 13.Wherein, this tensioning apparatus comprises that one arranges near carrier bar 9 and 33, one tumblers 15 of controlling and driving eccentric wheel 33 motions of movable eccentric wheel, 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 direction extending longitudinally towards the outer movement of housing 6, described stopper 91 drive carrier bars 9 move towards leaving housing 6 directions along carrier bar 9 direction extending longitudinally immediately, make carrier bar 9 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, the worm screw that described stopper 91 also can be configured to coordinate with worm gear, gear, tooth bar etc., move relative to described housing 6 along this carrier bar 9 direction extending longitudinally as long as can make described tumbler 15 order about described carrier bar 9 by transmission device.
In best mode for carrying out the invention, tumbler 15 comprises a closing sleeve 152 and a static handwheel 151 relative to this closing sleeve 152, described closing sleeve 152 has a central axis 153, described friction engaging and disengaging gear 10 is coupled on 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 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 elongated hole 93 extending longitudinally along carrier bar 9, closing sleeve 152 connects by its internal thread part 152a and bolt 37 external thread part 37a engagements, and the relative carrier bar 9 of closing sleeve 152 vertically arranges.Wherein, closing sleeve 152 is arranging briquetting 35 near carrier bar 9 one ends, this briquetting 35 between friction engaging and disengaging gear 10 and carrier bar 9 for carrying out spacing to eccentric wheel 33, and carrier bar 9 is compressed to keep the rate of tension of saw chain 11 after saw chain 11 tensionings, make in the course of the work, saw chain 11 can not relax because of the vibrations of chain saw 5, and the user is caused to danger.Simultaneously, on closing sleeve 152, near on an end of briquetting 35, also be fixed with back-up ring 36, this back-up ring 36, for spacing described briquetting 35, is deviate 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 the relative static handwheel 151 of closing sleeve 152, operates for the convenience of the user this closing sleeve 152, and closing sleeve 152 connects with handwheel 151 is chimeric, drives closing sleeve 152 while guaranteeing handwheel 151 rotation and moves 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 through on guard shield 13 with the guard shield opening 131 of the circle of the coaxial setting of closing sleeve 152, and handwheel 151 and these guard shield opening 131 form fit, make the leg 155 of handwheel 151 embed in 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 circumferentially arranged 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, by transmission mechanism 330, friction engaging and disengaging gear 10 and eccentric wheel 33, can carry out easily the operation of tensioning saw chain.Being rotated in the forward of indication is reverse rotation relatively 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 contrary understanding by 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 coordinate the through hole connecting portion 33b on described eccentric wheel 33 to connect described eccentric wheel 33, after making connector 313 connect described eccentric wheel 33, 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 on 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 ends that the opening part of C shape friction member 19 is adjacent form inside kink 19a, C shape friction member 19 is sheathed on the outer surface of pedestal 31 annular flange flange 300, and on C shape friction member 19, two relative kink 19a are engaged in respectively in the opening 302 on annular flange flange 310 surfaces, thereby make the relative pedestal 31 of C shape friction member 19 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 coordinates with connector 311 through the connecting hole 17b arranged on it by screw 18, thereby C shape friction member 19 is contained between rotary sleeve 27 and pedestal 31.Stage clip 29 is sheathed on closing sleeve 152, the top board 17 of one end bias voltage rotary sleeve 27, and other end bias voltage handwheel 151, produce certain axial displacement thereby make friction engaging and disengaging gear 10 can overcome the relative closing sleeve 152 of stage clip 29 active force along central axis 153.Be equipped with the perforate 17a coaxial with the central axis 153 of closing sleeve 152 on pedestal 31, top board 17, can make closing sleeve 152 be connected with bolt 37 afterwards through pressing plate 17 perforate 17a and pedestal 31 perforates 310.
Shown in Fig. 5, the main part of pedestal 31 is provided with the locking device 312 that a plurality of edges circumferentially evenly arrange, in the present embodiment, locking device 312 quantity are provided with three, the slope 312a protruded to handwheel 151 directions all is set on each locking device 312, and this slope 312a selectively compresses and connects with the slope 155a that is arranged at handwheel 151 legs 155; 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, drive for convenience when being rotated in the forward handwheel 151 10 pairs of saw chains of friction engaging and disengaging gear 11 to carry out tensioning and carrier bar 9 is pressed in to housing 6, and do not need to overcome stronger frictional force when reverse rotation handwheel 151 lax described saw chain 11, 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 be provided with Access Division 16a for peripheral tiltedly latch 273 one way engagement of rotary sleeve 27, for shackle member 16 being connected in to handwheel 151 medial surfaces, at handwheel 151 medial surfaces, corresponding connector 162 is set, shackle member 16 is connected on connector 162 by screw 160, wherein between connector 162 and shackle member 16, be provided with torsion spring 161, this torsion spring 161 can be given elastic force towards handwheel 151 centers of Access Division 16a of described shackle member 16, make when handwheel 151 connects described friction engaging and disengaging gear 10, the Access Division 16a of this shackle member 16 can mesh with the unidirectional clamping of the oblique latch 273 of described rotary sleeve 27 peripheries, thereby form single-direction transmission between tumbler 15 and friction engaging and disengaging gear 10, be oblique latch 273 rotations of the unidirectional drive of shackle member 16, and when reverse rotation shackle member 16 be with motionless oblique latch 273 rotations.This unidirectional transmission makes when being rotated in the forward described tumbler 15, and 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 rotary sleeve 27 inner peripheral surface 27b, rotary sleeve 27 drives 19 rotations of C shape friction member, because the relative pedestal 31 of C shape friction member 19 is fixedly installed, therefore C shape friction member 19 drives pedestal 31 rotations, thereby make eccentric wheel 33 rotations that are coupled to pedestal 31 connectors 313, eccentric wheel 33 makes stopper 91 drive carrier bars 9 move towards leaving housing 6 directions along carrier bar 9 direction extending longitudinally against described stopper 91, thereby carrier bar 9 is away from sprocket wheel 7 tensioning saw chains 11.While changing saw chain 11, reverse rotation tumbler 15, the Access Division 16a of shackle member 16 is creeped on this oblique latch 273, now rotary sleeve 27 keeps static and handwheel 151 to drive closing sleeves 152 continuing reverse rotation, when closing sleeve 152 unclamps and break away from and be arranged at the engagement of the bolt 37 of housing 6, now can be by guard shield 13 together with tensioning apparatus from chain saw 5 dismountings.
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 described housing 6, make closing sleeve 152 and be arranged at housing 6 also through the bolt 37 of carrier bar 9 elongated holes 93, to connect, 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 coordinates 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 synchronously rotates, make rotary sleeve 27 by with C shape friction member 19 between friction drive C shape friction member 19 and pedestal 31 and synchronize rotation, the eccentric wheel 33 that pedestal 31 band is dynamically connected on it synchronously rotates and acts on carrier bar 9 and vertically moves, saw chain 11 starts tensioning.Now, 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, after saw chain 11 tensionings have reached the optimum tensile force set in advance in factory, saw chain 11 tensionings complete.Now, 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 coordinated with this stopper 91 by the stopper 91 arranged on carrier bar 9, and further is delivered on the friction engaging and disengaging gear 10 be arranged between eccentric wheel 33 and tumbler 15.After saw chain 11 completes tensioning, this reaction force size has surpassed above-mentioned friction clutch power, continue rotation hand wheel 151, the reaction force that friction clutch 10 is produced eccentric wheel 33 by tensile force affects, and carries out clutch, in the present embodiment, between pivoted housing 27 inner peripheral surface 27b and C shape friction member 19 outer walls, skid, thereby make pedestal 31 stop operating, eccentric wheel 33 keeps static, and saw chain 11 rates of tension remain unchanged.Handwheel 151 continues rotate and thereby briquetting 35 continuation that drive closing sleeve 152 and be connected in closing sleeve 152 are moved compression carrier bar 9 to carrier bar 9 directions.Under the effect of thrust, intermeshing and the mutual extruding of the slope 155a of the slope 312a on locking device 312 and the interior side enclosure wall 155 of handwheel 151, 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, when handwheel 151 rotates to tensioning carrier bar 11 and compresses the state of carrier bar 11, friction engaging and disengaging gear 10 and guard shield 13 are just together with automatically locking, thereby 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 the operator only need be threadedly connected to the closing sleeve of tumbler 15 152 on bolt 37, and is aimed at stopper 91 without the cam surface 33a by eccentric wheel 33.Because stopper 91 contacts and puts in place even without the cam surface 33a with eccentric wheel 33 in installation process, may just with the end face of eccentric wheel 33, contact, 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 relative bolt 37 rotations of closing sleeve 152, eccentric wheel 33 just produces corresponding the rotation thereupon, when the cam surface 33a of eccentric wheel 33 turns to the position be meshed with stopper 91, under stage clip 29 active forces, friction engaging and disengaging gear 10 is a displacement away from handwheel 151 directions of 153 generations in closing sleeve 152 along central axis, now eccentric wheel 33 cam surface 33a and stopper 91 can automatically mesh and put in place.Adopt this mounting means, the job step that need to aim at while having saved saw chain 11 tensioning, improved operating efficiency widely.
And when needs more during saw chain, reverse rotation tumbler 15 drives closing sleeve 152 and produce the displacement of relative compaction direction on bolt 37, make slope 155a and the slope 312a on locking device 312 of the interior side enclosure wall 155 of handwheel 151 throw off engagement, locking device 312 recovers strain, the engagement of the profile of tooth end face 132 of the now automatic disengagement of the toothed member 312b on locking device 312 and guard shield opening 131, anti-loose structure has automatically terminated locking; Now continue to rotate backward handwheel 151, until closing sleeve 152 breaks away from the bolt 37 that is arranged at housing 6, now 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 eccentric wheel 33, because the annular flange flange 300 of C shape friction member 19 relative pedestals 31 is fixedly connected with, thereby make friction engaging and disengaging gear 10 produce by C shape friction member 19 and rotary sleeve 27 single faces the tensioning that friction clutch power realizes saw chain 11, 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 manufacture, consequent manufacturing cost also reduces greatly.When manufacturing in factory in advance corresponding to the required best chain tension of saw chain 11, the required friction clutch power of friction engaging and disengaging gear 10 just adjusts, 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.
Shown in Fig. 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 mean, do not repeat herein.In the present embodiment, annular friction part 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 part 19 ' is provided with the mating part 19b with notch 17c engagement, by notch 17c, with the engagement of mating part 19b, makes the relative pivoted housing 27 of annular friction part 19 ' be fixedly connected with.Annular friction part 19 ' is sheathed on pedestal 31 annular flange flange 300, make between the inner surface of annular friction part 19 ' of friction engaging and disengaging gear 10 ' and annular flange flange 300 outer surfaces and produce tangential friction force, be that annular friction part 19 ' forms a friction pair with pedestal annular flange flange 300, annular friction part 19 ' wherein can be made by corrugated steel, also available working of plastics or other material are made, and annular friction part 19 ' inner surface is arranged to corrugated and is conducive to the frictional force between design and annular flange flange 300.Certainly, to be that the tensile force required according to saw chain tension designs in advance fixed for the best frictional force of friction engaging and disengaging gear 10 '.
Certainly, those skilled in the art it is also contemplated that the structure of the friction engaging and disengaging gear 10 in the present invention is done to some changes, the kink 19a that for example, C shape friction member 19 in can the first embodiment extends internally is arranged to outward extending kink, be provided with corresponding mating part on rotary sleeve 27, thereby, by kink and being connected of mating part C shape friction member 19 and the position of 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, except being arranged to the corrugated male and fomale(M&F), can also be arranged to shiny surface or other form has surface.Can be integrally formed with pivoted housing 27 by the annular friction part 19 ' in the second embodiment, or directly the inner peripheral surface 27b of pivoted housing 27 is arranged rubbing surface with annular flange flange 300 surface generation single-sided friction for the transmission tensioning.
Claims (10)
1. the chain saw with chain tension adjusters comprises:
Housing;
Be arranged in housing and for driving the sprocket wheel of saw chain;
For the carrier bar of described saw chain motion guide, described carrier bar extends longitudinally out described hull outside, and housing vertically moves relatively;
For covering the guard shield of sprocket wheel and at least part of carrier bar;
Part is contained in the chain tension adjusters of guard shield, described chain tension adjusters comprises the stressed member that is arranged at carrier bar, drive described stressed member to drive the driving link that carrier bar vertically moves, drive the tumbler of described driving link, be arranged at the transmission mechanism between tumbler and driving link;
It is characterized in that: establish the first engaging piece on described guard shield, described tumbler is provided with butting section, described transmission mechanism is provided with locking device and friction engaging and disengaging gear, described locking device comprises with butting section can select the service portion of engagement to reach the second engaging piece that can select to connect locking with the first engaging piece, described friction engaging and disengaging gear comprises the first friction member and second friction member of mutual socket, between described first, second friction member, produces tangential friction force.
2. the chain saw with chain tension adjusters according to claim 1, it is characterized in that: described locking device is made by the material that can produce strain.
3. the chain saw with chain tension adjusters according to claim 2, it is characterized in that: described tumbler comprises handwheel and static closing sleeve relative to handwheel, described closing sleeve has a central axis, and described first, second friction member and driving link are coupled on described closing sleeve and with the closing sleeve central axis and coaxially arrange.
4. the chain saw with chain tension adjusters according to claim 3, it is characterized in that: the inboard of described handwheel has the leg of circumferential setting, and described butting section is the slope that is arranged at the leg end.
5. the chain saw with chain tension adjusters according to claim 4 is characterized in that: be provided with circular open on described guard shield, and described handwheel and circular open form fit, described the first engaging piece is the profile of tooth end face circumferentially arranged along circular open.
6. the chain saw with chain tension adjusters according to claim 5, it is characterized in that: be provided with bolt on described housing, described closing sleeve inside has internal thread part, and described bolt is threaded with closing sleeve.
7. the chain saw with chain tension adjusters according to claim 6, it is characterized in that: described transmission mechanism comprises the shackle member that is connected in the handwheel inboard, and a pivoted housing, described pivoted housing periphery is provided with oblique latch, and described shackle member and oblique latch engagement connect unidirectional drive pivoted housing and synchronize and rotate.
8. the chain saw with chain tension adjusters according to claim 7, it is characterized in that: described pivoted housing is set to the first friction member, the inner peripheral surface of described pivoted housing is arranged to rubbing surface, described transmission mechanism comprises a pedestal, be fixedly installed the annular flange flange that oriented the first friction member extends on described pedestal, described the second friction member is the annular friction part that is fixedly installed on annular flange flange, and described pivoted housing inner peripheral surface and annular friction part outer surface circumferentially mesh.
9. the chain saw with chain tension adjusters according to claim 7, it is characterized in that: described the first friction member is the annular element that is fixedly installed on the pivoted housing inboard, described transmission mechanism comprises a pedestal, described the second friction member is the annular flange flange that is fixedly installed on pedestal, the outer surface friction engagement of the inner surface of described annular element and annular flange flange.
10. the chain saw with chain tension adjusters according to claim 8 or claim 9, it is characterized in that: described locking device is arranged on described pedestal, and described service portion is the slope protruded to the handwheel direction, and described the second engaging piece is toothed member.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010512490 CN102430810B (en) | 2010-09-29 | 2010-09-29 | Chain saw with saw chain tension device |
| 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 201010512490 CN102430810B (en) | 2010-09-29 | 2010-09-29 | Chain saw with saw chain tension device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102430810A CN102430810A (en) | 2012-05-02 |
| CN102430810B true CN102430810B (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010512490 Active CN102430810B (en) | 2010-09-29 | 2010-09-29 | Chain saw with saw chain tension device |
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| CN (1) | CN102430810B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12053832B2 (en) | 2021-02-03 | 2024-08-06 | Techtronic Cordless Gp | Chainsaws |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106171827B (en) * | 2016-08-26 | 2022-12-09 | 苏州金莱克精密机械有限公司 | Chainsaw tool-free tensioner |
| CN108834822A (en) * | 2018-08-08 | 2018-11-20 | 浙江亚特电器有限公司 | A kind of chain saw |
| CN110170702B (en) * | 2019-07-02 | 2024-04-02 | 浙江嘉宏工具制造有限公司 | Hand-held electric chain saw |
| CN113523427B (en) * | 2021-07-30 | 2025-05-27 | 江苏东成工具科技有限公司 | Chainsaw |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201807794U (en) * | 2010-09-29 | 2011-04-27 | 苏州宝时得电动工具有限公司 | Chain saw with saw chain tensioning device |
-
2010
- 2010-09-29 CN CN 201010512490 patent/CN102430810B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201807794U (en) * | 2010-09-29 | 2011-04-27 | 苏州宝时得电动工具有限公司 | Chain saw with saw chain tensioning device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12053832B2 (en) | 2021-02-03 | 2024-08-06 | Techtronic Cordless Gp | Chainsaws |
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| Publication number | Publication date |
|---|---|
| CN102430810A (en) | 2012-05-02 |
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