WO2010069253A1 - 链锯 - Google Patents

链锯 Download PDF

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Publication number
WO2010069253A1
WO2010069253A1 PCT/CN2009/075652 CN2009075652W WO2010069253A1 WO 2010069253 A1 WO2010069253 A1 WO 2010069253A1 CN 2009075652 W CN2009075652 W CN 2009075652W WO 2010069253 A1 WO2010069253 A1 WO 2010069253A1
Authority
WO
WIPO (PCT)
Prior art keywords
chain
friction
saw
plate
clutch device
Prior art date
Application number
PCT/CN2009/075652
Other languages
English (en)
French (fr)
Inventor
郁玺
邓伟
陈秀莲
Original Assignee
苏州宝时得电动工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN200810189056A external-priority patent/CN101745696A/zh
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Priority to EP09832935.2A priority Critical patent/EP2366513B1/en
Priority to US13/140,001 priority patent/US9878463B2/en
Publication of WO2010069253A1 publication Critical patent/WO2010069253A1/zh
Priority to US15/845,678 priority patent/US20180104845A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00Chain saws; Equipment therefor
    • B27B17/14Arrangements for stretching the chain saw

Definitions

  • the present invention relates to a chain saw, and more particularly to a chain saw having a saw chain tensioning device.
  • PCT Patent Application No. WO09833631 discloses a chain saw having a chain tensioning device on August 6, 998, wherein the chain saw chain is fixed between the two holding disks and is fixed to the case together with them.
  • the body is movable longitudinally relative to the housing.
  • a stud is passed through a hole in an eccentric wheel and an elongated hole in the casing, and is screwed into a clamping plate that is guided on the casing and longitudinally movable, and the bolt head is eccentric Fixed to the housing.
  • the bolt is loosened, and the eccentric wheel is rotated, so that the bolt and the holding plate move toward the head of the chain plate.
  • the eccentric wheel When the saw chain reaches the expected tension, the eccentric wheel is stopped, and then The bolt is tightened to fix the eccentric wheel and the clamping plate and the link plate to the position set on the casing by the force.
  • the tensioning process of the saw chain is relatively complicated, and the locking of the chain plate is easy to loosen, thereby causing the tension of the saw chain to relax, which increases the risk of the saw chain jumping off the chain plate, and only through regularity.
  • the saw chain is subsequently tensioned to solve.
  • the Chinese Patent Publication No. CN 1 1 74841 C issued a chain saw on January 10, 2004, which has a saw chain tensioning device, wherein
  • the chain saw has a housing and has a sprocket mounted on the housing and a chain plate aligned with the sprocket, the chain plate extending out of the housing and circulating the saw chain engaged with the sprocket Oriented, the chain plate can be mounted in a longitudinally movable manner relative to the housing and the sprocket by means of a tensioning device, the tensioning device having a stop which can be fastened to the chain plate and can be assisted by means of a An eccentric rotating the rotating member, the rotating member is composed of two shell-shaped inner and outer hand wheels, and the inner and outer hand wheels can be inserted into each other and rotated relative to a common axis, wherein the inner hand wheel can be opposite Moving in the axial direction of the housing and supporting the chain plate, the outer hand
  • the offside card connector in saw After the chain is tensioned, the offside card connector allows the inner hand wheel and the outer hand wheel to be relatively statically connected.
  • the chain plate is not easy to loosen, and the effective tension of the saw chain is ensured, but in the process of tensioning, the inner hand wheel and the outer hand wheel need to be separately operated, and the operation is complicated.
  • the man-machine function is weak.
  • Cida Patent Publication No. CN 1 1 38620 C discloses a chain saw comprising a sprocket rotatably supported in a housing for guiding a chain on a chain plate, one for a saw chain tensioning device for longitudinally moving a chain plate and having an eccentric wheel for moving the chain plate and a rotating device for rotating the eccentric wheel, wherein the rotary connecting device between the rotating device and the eccentric wheel is constituted by a snap clutch , The transposition snap force is adjusted corresponding to the desired chain tension.
  • the structure enables the saw chain and the compression chain to be tensioned at the same time in the tensioning process of the saw chain, and the operation is convenient, and the man-machine function is strong, but the provided clutch is easy to wear, and the structure is It is not stable enough; and the reverse rotation of the rotating device when replacing the saw chain needs to overcome the jamming resistance between the snap-on clutches, and the operation is not labor-saving.
  • the technical problem to be solved by the present invention is to provide a chain saw which has good stability and is not easy to wear, and operates a labor-saving saw chain tensioning device.
  • a chain saw includes a casing, a sprocket disposed in the casing for driving the saw chain, and a movement for the saw chain a guide chain plate extending longitudinally out of the housing and longitudinally movable relative to the housing, the chain saw further comprising a saw chain tensioning device, wherein the saw chain is tensioned
  • the device comprises a force receiving member disposed on the chain plate, an active member driving the force receiving member to drive the longitudinal movement of the link plate, and a rotating device for driving the active member, the rotating device and the active member There is a stepless clutch device between them.
  • the stepless clutch device is a friction clutch device, and the friction force of the friction clutch device is determined by the tension required by the saw chain.
  • a one-way transmission is disposed between the rotating device and the friction clutch device.
  • the one-way transmission device includes a latching member disposed on the rotating device, and an oblique latching tooth disposed on the frictional clutching device to engage with the engaging member, wherein the rotating device can drive the friction in one direction through the engaging member The clutch device rotates.
  • the chain saw further includes a shroud having a shroud opening, the lower end of the shroud opening having a toothed end surface disposed along a circumferential direction of the shroud opening;
  • the rotating device including a clamping sleeve a cartridge, and a hand wheel fixedly coupled to the clamping sleeve;
  • the friction clutch device is provided with a locking device, the locking device is made of an elastically deformable material, and the locking device includes a toothed end surface The one-way snap-on toothed piece and the sloped surface that is pressed against the hand wheel.
  • the friction clutch device includes an elastic member that provides a friction pressure and a friction disc assembly, the elastic member biases the friction disc assembly; the friction disc assembly includes at least one friction disc and a rotation
  • the rotating clutch sleeve is disposed on the periphery of the friction disc; the friction clutch device further includes a friction disc base that can be rotated by the friction disc; the friction disc base is connected to the active And the friction plate, the elastic member is disposed between the friction plate base and the friction plate.
  • At least one engaging member is disposed between the rotating device and the rotating sleeve, the oblique engaging teeth are disposed on an outer circumferential surface of the rotating sleeve, and the engaging member drives the rotating sleeve during the tensioning of the saw chain Synchronous movement with the rotating device.
  • the active member is configured as an eccentric wheel, and the force receiving member is configured to be fixed to the The stop of the chain plate.
  • a chain saw includes a casing, a sprocket disposed in the casing for driving the saw chain, and a chain plate guiding the movement of the saw chain, the chain plate extending longitudinally from the casing Externally, and movable longitudinally relative to the housing, the chain saw further includes a saw chain tensioning device, the saw chain tensioning device including a force member disposed on the link plate, a drive station An active member for driving the longitudinal movement of the link plate, and a rotating device for driving the active member, a clutch device disposed between the rotating device and the active member, and a single device is disposed between the rotating device and the clutch device To the transmission.
  • the one-way transmission device comprises a latching member disposed on the rotating device, and an oblique latching tooth disposed on the clutching device, wherein the latching member is unidirectionally engaged with the oblique latching tooth.
  • the clutch device is configured as a friction clutch device; the friction force of the friction clutch device is adjusted corresponding to a tensioning force required by the saw chain.
  • the clutch device is configured as a snap-on clutch device, the snap-in force of the snap-on clutch device being adjusted corresponding to the tension required by the saw chain.
  • the active member is configured as a gear
  • the force receiving member is configured as a rack assembly that is engaged with the gear.
  • the snap-on clutch device includes a first clip member and a second clip member, and an elastic member that generates a force between the first clip member and the second clip member, wherein the elastic member is the first member The clip and the second clip provide a snap-in force.
  • the rack assembly further includes at least one anti-loose tooth, the tensioning device further comprising a anti-loose device disposed between the latching clutch device and the link plate, the anti-loose device and the anti-loose tooth in the saw When the chain is tensioned, the mating mating limits the chain plate.
  • the chain saw of the present invention has a tensioning device for compressing the chain plate while tensioning the saw chain, and can prevent the tension from being loosened.
  • the saw chain tensioning device has a stable structure, is not easy to wear, and is labor-saving.
  • Figure 1 is a partial front elevational view of a chain saw in a first embodiment of the present invention after the shield has been removed.
  • Figure 2 is a cross-sectional view showing the tensioning device of the chain saw in the first embodiment of the present invention.
  • Fig. 3 is a perspective exploded perspective view showing the tensioning device of the chain saw in the first embodiment of the present invention.
  • Figure 4 is a schematic plan view of the friction clutch device in the first embodiment of the present invention.
  • Fig. 5 is a perspective view showing the hand wheel engaging rotating sleeve of the chain saw in the first embodiment of the present invention.
  • Figure 6 is a cross-sectional view showing a tensioning device of a chain saw in a second embodiment of the present invention.
  • Fig. 7 is a perspective exploded perspective view showing the tensioning device of the chain saw in the second embodiment of the present invention.
  • Figure 8 is a partially enlarged schematic view of the chain saw tensioning device of Figure 7.
  • the chain saw 5 includes a housing 6 , and a sprocket 7 for driving the saw chain 11 is rotatably supported in the housing 6 , wherein The sprocket 7 is driven by a power unit (not shown) through a transmission device, which may be provided as a motor or an engine; the chain saw 5 further includes a chain plate 9 supported at one end by the chain plate 9 In the casing 6, the other end extends in the longitudinal direction of the chain plate 9 out of the casing 6, and the saw chain 11 is sleeved on the sprocket 7 and the chain plate 9, and can be circulated along the edge of the chain plate 9. guide.
  • the chain plate 9 is movable relative to the housing 6 along the longitudinal extension of the link plate 9, such that the spacing between the link plate 9 and the sprocket 7 can be varied such that the saw chain 11 can be tensioned or relaxed.
  • a position suitable for the tension of the adjusted saw chain 11 is used.
  • the saw 5 is provided with a saw chain tensioning device which is placed in a shield 13 for closing the housing 6.
  • the tensioning device comprises a rotatable eccentric 33 near one side of the chain plate 9, a rotating device 15 for controlling the rotation of the eccentric 33, and a friction clutch device 10, the outer curved surface 33a of the eccentric 33 Abutting against a stop 91 fixedly coupled to the link plate 9, when the rotary device 15 operates the eccentric 33 to rotate, the eccentric 33 abuts against the stop 91 and pushes the stop 91 along the link plate 9
  • the longitudinal extension direction is longitudinally moved toward the outside of the housing 6, and then the stopper 91 drives the chain plate 9 to move longitudinally away from the housing 6 along the longitudinal extension direction of the chain plate 9, so that the chain plate 9 is away from the sprocket 7,
  • the saw chain 11 is tensioned
  • the eccentric 33 can also be configured as a worm gear, a gear, etc.
  • the stop 91 can also be configured to cooperate with a worm wheel, a gear worm, a rack, etc., as long as the The rotating device 15 drives the chain plate 9 to move relative to the
  • the friction clutch device 10 is a rotary connecting device disposed between the rotating device 15 and the eccentric 33 for connecting the rotating device 15 and the eccentric 33.
  • the friction clutch device 10 generates a friction clutch force by a friction device thereon, and the friction clutch force refers to a limit value reached by the friction force on the friction device when the friction clutch device 10 is engaged.
  • the frictional clutch force corresponds to the optimum saw chain tension required for the saw chain 11 and the frictional force of the friction is pre-adjusted.
  • the friction clutch device 10 causes the rotating device 15 to fail to rotate the eccentric 33, and the rotating device 15 continues to complete the compression chain plate 9.
  • the friction clutch device 10 ensures that the saw chain 11 always has the same saw chain tension after the operation of the saw chain tensioning.
  • This tension is caused by the friction of the motorized clutch device 10 which is pre-adjusted in the factory. It is determined by the joint force that has nothing to do with the user's personal feeling, so that the user can conveniently tension the saw chain tension state for the optimal working process during the tensioning of the saw chain.
  • the rotating device 15 includes a clamping sleeve 152 and a hand wheel 151 that is stationary relative to the clamping sleeve 152.
  • the clamping sleeve 152 has a central axis 153.
  • the eccentric 33 and the clamping sleeve 152 can be coupled by the friction clutch device 10, and the central axis 153 of the clamping sleeve 152 is coaxial with the center line of the rotating shaft of the eccentric 33.
  • the clamping sleeve The inner portion of the 152 is formed as an internal thread portion 152a through which the clamping sleeve 152 is fixed in the housing 6 and protrudes perpendicularly to the housing 6, and is disposed through the chain plate 9.
  • the externally threaded portion 37a of the bolt 37 of the longitudinally extending elongated hole 93 is fitted such that the clamping sleeve 152 is disposed perpendicular to the link plate 9.
  • the clamping sleeve 152 is sleeved at one end of the chain plate 9 with a pressing block 35 for the eccentric wheel 33 between the friction clutch device 10 and the chain plate 9. Limiting, and after the chain saw 5 is tensioned, the chain plate 9 is pressed to maintain the tension of the chain saw 5, so that the saw chain 11 does not relax due to the vibration of the chain saw 5 during operation, The user is in danger.
  • the clamping sleeve 152 is further provided with a retaining ring 36 on the end adjacent to the chain plate 9.
  • the retaining ring 36 is used to limit the pressing block 35 to prevent the pressing block 35 from the clamping sleeve. 152 out of the box to ensure the stability of the structure.
  • the other end of the clamping sleeve 152 is surrounded by a hand wheel 151 that is relatively stationary with the clamping sleeve 152 to facilitate the user to operate the clamping sleeve 152.
  • the clamping sleeve 152 and the hand wheel 151 The mating mating ensures that the hand wheel 151 drives the clamping sleeve 152 to move.
  • a guard wall 155 is provided on the inner side of the hand wheel 151 in the circumferential direction, and a tip end portion of the surrounding wall 155 forms a slope surface 155a.
  • the rotating device 15 passes through a circular shroud opening 131 on the shroud 13 that is coaxial with the clamping sleeve 152.
  • the shroud opening 131 is in a form-fitting manner with the hand wheel 151, so that the hand wheel 151 can be
  • the shroud opening 131 is inserted into the shroud opening 131, and the clamping sleeve 152 can be rotated relative to the shroud 13, thereby conveniently operating the tensioning saw chain.
  • the lower end portion of the shroud opening 131 has a toothed end surface 132 provided along the circumferential direction of the opening.
  • the friction clutch device 10 includes a friction plate assembly and a friction plate base.
  • the friction plate assembly includes a first friction plate 19, a second friction plate 21, a third friction plate 23, a fourth friction plate 25, and a rotating sleeve 27, the friction plate
  • the base 31 is adjacent to the eccentric
  • An eccentric link 313 is disposed on one side, and the eccentric link 313 and the shackle base 31 are integrally formed, and the eccentric connection portion 33b provided on the eccentric 33 is coupled to the eccentric wheel
  • the friction disk base 31 is provided with at least one friction disk connector 311 on a side facing away from the eccentric 33.
  • the friction disk base 31 is provided.
  • the first friction plate 19, the third friction plate 23, and the fourth friction plate 25 are connected to each other through a connecting hole of the friction plate screw 18 and the friction plate connecting member 311.
  • the fourth friction plate 25 is disposed adjacent to the friction plate base 31, and is disposed between the first friction plate 19 and the second friction plate 21 and the third friction plate 23, the second friction plate 21 clamped between the first friction plate 19 and the third friction plate 23, and is movably sleeved on the friction plate
  • the rotating sleeve 27 is supported on the side of the friction disc base 31 facing away from the eccentric 33, and accommodates the first to fourth friction discs therein, and the rotating sleeve 27 includes an outer circumference.
  • the third friction plate 23 and the fourth friction plate 25 are separated, and the ridge 272 can cooperate with the four ports 211 connected to the edge of the second friction plate 21, so that The second friction plate 21 can be connected to the rotating sleeve 27 relatively statically.
  • the compression spring 29 is biased at the end of the friction plate base 31, and the other end biases the fourth friction plate 25 to provide the friction plate pressure, thereby generating a corresponding friction force.
  • the first friction plate 19, the second friction plate 21, the third friction plate 25, the fourth friction plate 27 and the annular friction plate 271 provided on the friction plate base 31 have The larger the coefficient of friction, and the magnitude of the force can be adjusted by the compression spring 29 to their biasing force. Meanwhile, the first friction plate 19, the second friction plate 21, the third friction plate 23, the fourth friction plate 25, and the friction plate base 31 are both opened with the clamping sleeve 152.
  • the central axis 153 is a coaxial opening
  • the clamping sleeve 152 is connected to the bolt 37 after passing through the opening thereof
  • the hand wheel 151 and the first motor fixedly connected to the clamping sleeve 152
  • a limit compression spring 17 is mounted between the trays 19, and the limit compression spring 17 biases the hand wheel 151 and the first friction plate 19 to give a limit force to the friction clutch device 10 to prevent the
  • the jaw clutch device 10 moves axially on the central axis 153 of the clamping sleeve 152, causing the tensioning device to be less stable.
  • the main body portion of the friction disc base 31 is provided with a plurality of anti-loose devices 312 which are disposed in the circumferential direction.
  • the number of the anti-loose devices 312 is set to three, and each anti-defense device
  • the loosening device 312 is provided with a slope surface 312a protruding toward the hand wheel 151, and the slope surface 312a is selectively engageable with the slope 155a provided on the inner side 155 of the hand wheel 151; in addition, at each slope surface 312a
  • the toothed member 312b is disposed on the same side, and the toothed member 312b is selectively engageable with the toothed end surface 132 of the shroud opening 131.
  • the number of the toothed members 312b is two.
  • the upper tooth member 312b and the slope surface 312a are made of a material capable of elastically deforming.
  • the hand wheel 151 In order to facilitate the hand wheel 151 to drive the friction clutch device 10 to tighten the saw chain, and to relax the saw chain 11 without overcoming the strong friction force, as shown in FIG. 3, the hand wheel 151 is inside.
  • the loop edge is movably connected with at least one clip member 16 by a screw 17, and the clip member 16 in this embodiment is provided with three (refer to FIG. 5), and the clip member 16 includes a connecting portion and a shape for connecting the hand wheel 151.
  • the engaging portion 16a provided with the oblique latch 273 is configured to cooperate with the connecting portion of the engaging member 16, and the inner ring edge of the hand wheel 151 is provided with a corresponding connecting member 162 for engaging the screw 160, and A torsion spring 161 is disposed between the connecting portion of the latching member 16 and the connecting member 162 of the hand wheel 151.
  • the torsion spring 161 can provide the latching portion 16a of the latching member 16 with an elastic force toward the center of the hand wheel 151. Causing the handwheel 151 to connect the capricorn
  • the 273 one-way snap-fit is engaged, so that a one-way transmission device is formed between the rotating device 15 and the friction clutch device 10, that is, the latching member 16 can only rotate the oblique latching teeth 273 in one direction, and is engaged in the reverse rotation.
  • the piece 16 rotates with the fixed tilting tooth 273.
  • the one-way transmission makes the hand wheel rotate when the rotating device 15 is rotated
  • the latching member 16 is rotated to drive the rotating sleeve 27 to rotate; when the saw chain is replaced, the chain plate needs to be removed first, and the locking device 15 is reversely rotated, and the engaging portion 16a of the latching member 16 can be
  • the inclined latch 273 is crawled so that the rotating sleeve 27 remains stationary and the hand wheel 151 continues to rotate, and the clamping sleeve 152 is driven away from the bolt 37 disposed in the housing 6, so that the shield 13 drives the tensioning device from The chain saw 5 is taken off.
  • the one-way transmission device can use other one-way transmission devices such as one-way clutches, one-way bearings, and other end-tooth ratchets disclosed in the mechanical manual, in addition to the single-prong ratchet mechanism disclosed in this embodiment.
  • the mechanism, the internal ratchet mechanism, the sector-shaped ratchet mechanism, and the like realize a one-way transmission between the rotating device 15 and the friction clutch device 10.
  • one-way hydraulic or pneumatic transmission can also be achieved with hydraulic or pneumatic check valves.
  • the tensioning of the saw chain 11 of the chain saw of the present invention and the pressing of the link plate 9 are achieved as follows:
  • the cover 13 is first fastened
  • the corresponding position on the housing 6 aligns the rotating device 15 of the tensioning device disposed on the shield 13 through the bolt 37 of the link plate 9, and then rotates the hand wheel 151 to drive the hand wheel 151
  • the clamping sleeve 152 is axially moved on the bolt 37 against the chain plate 9 by screwing, and at the same time, the hand wheel 151 is engaged with the locking portion 16 and the rotating sleeve via the snap member 16 connected thereto.
  • peripheral oblique teeth 273 cooperate to drive the rotating sleeve 27 to rotate synchronously, so that the rotating sleeve 27 drives the second friction disc 21 coupled with the upper rib 272 to rotate synchronously, and the friction force generated by the action of the spring 29
  • the first friction plate 19 and the third friction plate 23 are synchronously rotated, and at the same time, the rotary sleeve 27 also drives the third friction plate 23 and the fourth friction plate 25 to rotate synchronously by the friction force, and then
  • the first, third, and fourth friction plates are fixedly connected to the motorcycle by the friction plate screw 18
  • the disk base 31 can drive the friction disk base 31 to rotate synchronously, so that the friction disk base 31 drives the eccentric wheel 33 connected thereto to rotate synchronously, and the chain plate 9 moves longitudinally, and the saw chain 11 starts to be tensioned.
  • the tension of the saw chain 11 is smaller than the friction force generated by the spring 29 biasing the friction disc in the pre-set clutch device 10 of the factory.
  • the chain saw 5 is tightened, and at this time, the tension of the chain 11 is applied to the chain plate 9.
  • the reaction force forms a restraining force which is transmitted to the eccentric 33 engaged with the stopper 91 through the stopper 91 provided on the link plate 9, and further transmitted to between the eccentric 33 and the rotating device 15.
  • the reaction force exceeds the above-mentioned frictional force, and the hand wheel 151 is continuously rotated, and the friction clutch is tensioned.
  • the tightening force exerts a reaction force on the eccentric wheel 33 to perform the clutching.
  • the first friction disk 19, the third friction disk 23, and the second friction disk 21 overcome the frictional force.
  • the third friction plate 23, the fourth friction plate 25 and the rotating sleeve 27 are disengaged against the frictional force between them, so that the friction disk base 31 stops rotating, and the eccentric wheel 33 remains stationary.
  • the tension of the saw chain 11 remains unchanged.
  • the slope surface 312a on the lock preventing device 312 and the slope 155a of the inner side 155 of the hand wheel 151 are engaged with each other and pressed against each other, so that the lock preventing device 312 generates a elasticity radially outward.
  • the toothed member 312b meshes with the toothed end face 132 provided in the shroud opening 131 in the radial direction to form a further ratchet device, that is, when the hand wheel 151 is rotated to tension the link plate and press the link plate In the state, the friction clutch device 10 and the shield 13 are automatically locked together, thereby ensuring that the chain plate 9 does not come loose during operation.
  • the reverse rotation device 15 drives the clamping sleeve 152 to a position on the bolt 37 in a relative pressing direction, so that the slope 155a of the inner side 155 of the hand wheel 151 and the anti-loose device 312
  • the slope surface 312a is disengaged, the anti-loose device 312 is restored to elastic deformation, and the toothed member 312b on the anti-loose device 312 is automatically disengaged from the toothed end surface 132 of the shroud opening 131, that is, the anti-loose structure is automatically unlocked;
  • the hand wheel 151 is continuously rotated in the reverse direction until the clamping sleeve 152 is disengaged from the bolt 37 provided in the casing 6, so that the shroud 13 causes the tensioning device to be detached from the chain saw 5.
  • the friction clutch device 10 used in this embodiment belongs to a stepless clutch device, that is, there is no position requirement between the clutch members when clutching, that is, there is no sudden change between them, which is different from the clutch clutch disclosed in the previous case. There is a position requirement between the clips when they are engaged; of course, those skilled in the art can also conceive other types of stepless clutch devices according to the embodiment.
  • FIG. 6, FIG. 7, and FIG. 8, which is a second embodiment of the present invention the chain saw is substantially the same as the first embodiment described above, except that different saw chain tensioning structures are used.
  • the same components are denoted by the same reference numerals, and the different components are denoted by new reference numerals.
  • the tensioning device includes a rotatable gear 225 near one side of the link plate 9, a rack assembly 215 fixedly disposed on the link plate 9 to engage the gear 225, a rotating device 218 for controlling the rotation of the gear 225, and One card is connected to the clutch device 400.
  • the gear 225 cooperates with a rack 251 on the rack assembly 215.
  • the rack assembly 21 5 drives the chain plate 9 to move outside the casing in the same direction, so that the chain plate 9 is away from the sprocket 7, thereby tensioning the saw chain (not shown).
  • the snap-on clutch device 400 is a rotary connecting device disposed between the rotating device 218 and the gear 225 for connecting the rotating device 218 and the gear 225.
  • the snap-on clutch device 400 includes a first clutch member 222, a second clutch member 224 and a spring 220.
  • the gear 255 is disposed in a rotationally fixed manner on the second clutch member 224 adjacent to the rack assembly.
  • the opposite side of the second clutch member 224 is configured as a first latching member 221, a first latching member 221 of the first clutching member 222 and a second card of the second latching member 224.
  • the connector 241 is disposed opposite to the engagement.
  • the spring 220 is disposed between the first clutch member 222 and the hand wheel 281.
  • the two ends of the spring 220 respectively abut the first clutch member 222 of the hand wheel 281. And the first clutch member 222 is biased toward the second clutch member 224. And the first clutch member 222, the second clutch member 224 and the spring 220 cooperate to generate a snap-on clutch force, wherein the snap-on clutch force refers to the first latch member of the first clutch member 222.
  • the second engaging member 241 of the second clutch member 224 is engaged with the engaging force of the second clutch member 224, and the spring 220 biases the first clutch member 222 against the axial direction of the first clutch member 222 and the second clutch member 224.
  • the second clutch member 224 has a certain pressure between the first clutch member 222 and the second clutch member 224.
  • the snap-in clutch force corresponds to the optimum saw chain tension required for the saw chain, and the card-joining force is adjusted in advance, that is, the spring force corresponding to the tension required by the saw chain is adjusted to the spring force of the card-carrying device 400.
  • This tension is determined by the snap-in clutch force of the snap-on clutch device 400 pre-adjusted in the factory, regardless of the user's personal feeling, so that the user can easily tighten to the most during the tensioning process of the saw chain. A pre-designed saw chain tension state for a good working process.
  • the movement resistance of the link plate 9 is gradually increased, and the rotating device 21 8 continues to rotate until the chain plate 9 is moved.
  • the clutch device 400 is engaged such that the rotating device 21 8 cannot drive the gear 225 to rotate, and the rotating device 21 8 continues to complete the compression chain plate. 9 works, and at this time the gear 225 remains stationary, that is, the saw chain 2 maintains a certain tension. Therefore, the snap-on clutch device 400 ensures that the saw chain always has the same chain tension after the saw chain is tensioned.
  • the peripheral outer wall of the first clutch member 222 is provided with a diagonal tooth 274.
  • the rotating device 218 of the tensioning device includes a clamping sleeve 282 and a hand wheel 281 that is relatively stationary with the clamping sleeve 282.
  • the end of the clamping sleeve 282 and the hand wheel 281 a fitting connection for the operator to control the operation;
  • the clamping sleeve 282 has a central axis 283, and sequentially passes through the spring 220 of the clutching device 400, the first clutch member 222, in the direction of the central axis 283, a second clutch member 224, and a gear 225 fixedly disposed on the second clutch member 224, and the clamping sleeve 282 central axis 283 and the spring 220, the first clutch member 222, and the second clutch member 224 It is coaxial with the center line of the rotating shaft of the gear 225.
  • the inner side of the hand wheel 281 is movably connected to the at least one latching member 21 6 by a screw 21 7 .
  • the latching member 21 6 includes a latching tooth 21 6a that is in a form-fitting engagement with the first latching member 222.
  • the engaging member 21 6 is connected, and the connecting wheel 281 is provided with a connecting member 262 corresponding to the screw 21 7 , and a torsion spring 261 is disposed between each of the engaging members 21 6 and the hand wheel 281 , and the torsion spring 261 is disposed.
  • the engaging member 21 6 can be engaged with the tooth 21 6a - an elastic force toward the center of the hand wheel 281, so that when the hand wheel 281 is connected to the friction clutch device 400, the engaging member 21 6 engages the tooth 21 6a can be unidirectionally engaged with the oblique teeth 274 of the circumferential outer wall of the first clutch member 222, thereby forming a one-way transmission between the rotating device 218 and the friction clutch device 400, the one-way transmission
  • the rotating device 21 8 is rotated, the rotation of the hand wheel 281 drives the engaging member 216 to rotate, and the engaging member 21 6 can only rotate the oblique toothing 274 in one direction, that is, the first clutch member 222 is rotated, thereby making the first
  • the snap-fit connection between the clutch member 222 and the second clutch member 224 drives the gear 225 to tension the saw chain; when the saw is replaced When the chain is required, the rotating device 281 is required to rotate in the opposite direction.
  • the engaging teeth 21 6a of the engaging member 21 6 only crawl on the oblique teeth 274, and no longer rotate the first clutch member 222. At this time, the first clutch member 222 is kept. Still, the hand wheel 281 continues to rotate in the opposite direction, and drives the clamping sleeve 252 to reversely rotate out of engagement with the bolt 37, thereby causing the shield 13 to bring the tensioning device off the chain saw. Therefore, the reverse rotation of the rotating device 21 8 by the operator when replacing the saw chain does not need to overcome the jamming resistance between the first engaging member 222 and the second engaging member 224 of the snap-on clutch device 400.
  • the one-way transmission device can use other one-way transmission devices such as one-way clutches, one-way bearings, and other end-tooth ratchets disclosed in the mechanical manual, in addition to the single-prong ratchet mechanism disclosed in this embodiment.
  • the mechanism, the internal ratchet mechanism, the sector-shaped ratchet mechanism, and the like realize a one-way transmission between the rotating device 218 and the friction clutch device 400.
  • hydraulic or pneumatic one-way valves can also be used to achieve one-way hydraulic or pneumatic transmission.
  • the tensioning device further includes a locking device 226 disposed on the clamping sleeve 282 near the end of the chain plate 2, and the locking device 226 is disposed on the latching clutch device 400 and the chain plate 9. between.
  • the locking device 226 includes an opening 238 coaxial with the central axis 283 of the clamping sleeve 282.
  • the clamping sleeve 282 is threadedly coupled to the bolt 37 through the opening 238 thereof.
  • the locking device 226 is adjacent to the chain.
  • At least one second anti-loose tooth 266 is disposed on the circumference of one side of the plate 9 , and the second anti-loose tooth 266 can be engaged with the first anti-loose tooth 252 provided on the rack device 215 .
  • the tensioning device further includes a retaining ring 228 sleeved on the clamping sleeve 282 near one end of the chain plate 9.
  • the retaining ring 228 is used for the limiting locking device 26 and the latching clutch device 400 to prevent the locking device 226.
  • the snap-on clutch device 400 is disengaged from the clamping sleeve 282, which ensures the stability of the tensioning device. Rotate further after the chain saw is tensioned At the time of the device 21 8 , the clamping sleeve 282 and the locking device 226 connected to the clamping sleeve 282 continue to move in the direction of the link plate 9 , thereby pressing the link plate 9 .
  • the locking teeth 266 of the locking device 226 are engaged with the locking teeth 252 of the rack assembly 215 to form a ratchet device, thereby maintaining the tension of the chain saw and the chain plate 9
  • the compression degree is effective to avoid slackening after the saw chain is vibrated due to the operation of the chain saw 5; at the same time, the chain jump caused by the slack of the saw chain is also prevented, and the safety of the user is ensured.
  • the clamping sleeve 282 passes through a circular shroud opening 239 on the shroud 13 that is coaxial with the clamping sleeve 282.
  • the shroud opening 239 is shaped to match the hand wheel 281 such that the hand
  • the wheel 281 can be inserted into the shroud opening 239 and can rotate the clamping sleeve 282 relative to the shroud 13 .
  • the retaining ring 228 is disposed on the other side of the shroud 13 facing away from the hand wheel 281.
  • the tensioning device is such that the tensioning device can be placed in the shroud 13 and can be removed from the housing 6 with the shroud 103.
  • the saw chain tensioning and the link plate pressing of the chain saw in the present embodiment are realized as follows: When the user takes the chain saw 5 to tighten the saw chain, the shield 1 3 is first tensioned together The device is fastened to the housing
  • the gear 225 acts on the rack 251 of the rack device 215 of the chain plate 9 to drive the rack 251 to move longitudinally relative to the housing 6 toward the outside of the housing 6, so that the chain plate 9 is opposite to the housing
  • the housing 6 moves longitudinally outwardly of the housing 6 and the saw chain begins to tension.
  • the restraining force of the tension of the saw chain against the reaction force of the chain plate 9 is transmitted to the teeth in the rack device 21 5 through the rack device 215 provided on the link plate 9
  • the strip 251 mates with the gear 225 and is further transferred to the snap-on clutch device 400 disposed between the gear 225 and the rotating device 218.
  • the hand wheel 281 when the tension of the saw chain is less than the snap-in clutch force in the factory-set snap-on clutch device, the saw chain starts to be tensioned; when the saw chain tension reaches the optimum preset in the factory After the tensioning force, the hand wheel 281 is further rotated, the reaction force is greater than the clamping force, and the carding clutch device is affected by the reaction force, and the first of the first clutch members 222 in the clutch device is engaged.
  • the latching member 221 is disengaged from the second latching member 241 on the second latching member 224. Since the latching member in the embodiment is provided with a latching tooth, the first latching member
  • the teeth on the second engaging member 241 perform a crawling motion on the teeth on the second engaging member 241.
  • the first clutch member 222 cannot move the second clutch member 224, and the clutching clutch device 400 is engaged.
  • Gear 225 remains stationary at the current standstill and the chain tension remains the same. After the saw chain is tensioned, the hand wheel 281 continues to rotate, and the locking sleeve 282 and the locking device 226 connected to the clamping sleeve 282 continue to move toward the chain plate 9, and the pressure is pressed.
  • the second locking teeth 266 on the locking device 926 engage the first locking teeth 252 of the rack device 215 on the chain plate 9 to lock the position of the chain plate 9, complete the chain tensioning and The chain plate is locked, and the saw chain can be prevented from loosening, and the operation is simple and labor-saving.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Description

链锯
技术领域
本发明涉及一种链锯, 尤其是一种具有锯链张紧装置的链锯。
背景技术
PCT专利申请 W09833631 于 1 998年 8月 6 日公开了一种具有链条张紧装置 的链锯, 其中, 链锯链板被固定于两个夹持盘之间, 并且与它们一起被固定于 壳体上, 且可相对壳体纵向移动。 一根栓柱穿过一偏心轮中的一个孔和壳体上 的长形孔, 拧固于在壳体上受导引, 并且可纵向移动的夹持盘之中, 其螺栓头 将偏心轮固定于壳体上。 为了张紧锯链, 首先需将螺栓松开, 转动偏心轮, 从 而使螺栓与夹持盘向链板顶头方向移动, 当锯链达到所预期的张紧力时, 停止 转动偏心轮, 然后再拧紧螺栓, 从而通过受力作用将偏心轮和夹持盘与链板固 定于壳体上所设定的位置上。 该锯链张紧过程相对比较复杂, 而且链板锁定容 易松懈, 从而造成锯链的张紧力松弛, 增加了锯链从链板上跳下来的危险性, 对此, 只能是通过经常性地将锯链进行后续张紧来解决。
为解决上述链锯张紧问题, 中国专利公告号为 CN 1 1 74841 C 于 2004 年 1 1 月 1 0 日授权公布了一种链锯, 该链锯具有一锯链张紧装置, 其中, 该链锯具有 一壳体, 且有一个安装在该壳体上的链轮和一个与该链轮对准的链板, 该链板 从壳体中伸展出去并且对与链轮啮合的锯链循环地导向, 该链板可以通过一个 张紧装置相对于壳体及链轮在纵向上可移动地调节地被安装, 而张紧装置具有 一个可固定于链板上的止挡和可借助于一个转动元件转动的偏心轮, 该转动元 件由两个壳状的内、 外手轮组成, 内、 外手轮可以相互插装在一起, 且绕一公 共轴线相对转动, 其中, 内手轮可相对于壳体沿轴向移动并且可支撑于链板上, 外手轮与偏心轮以携带转动方式连接, 且内手轮与外手轮之间, 以及外手轮与 壳体之间都通过一越位卡接连接器连接, 在锯链张紧后, 该越位卡接连接器可 使得内手轮和外手轮可相对静止的连接。 通过上述结构, 该链锯在锯链张紧后, 链板不易松懈, 保证了锯链有效的张紧力, 但在张紧的过程中需要对内手轮和 外手轮分別操作, 操作复杂, 人机功能较弱。
中国专利公告号为 CN 1 1 38620 C 公开了一种链锯, 该链锯包括一个可转动 地支承在壳体中的且用于在链板上受引导的锯链的链轮、 一个用于使链板纵向 移动的且具有一个使链板移动的偏心轮和一个使偏心轮转动的转动装置的锯链 张紧装置, 其中, 转动装置与偏心轮之间的转动连接装置由卡接离合器构成, 对应于所需的链条张力来调节其换位卡接力。 该结构使得在锯链张紧过程中, 只需对一个转动装置操作即可同时张紧锯链和压紧链板, 操作方便, 人机功能 强, 但所设置的卡接离合器容易磨损, 结构不够稳定; 且在更换锯链时反向旋 转转动装置需要克服卡接离合器之间的卡接阻力, 操作不省力。
发明内容
针对现有技术的不足, 本发明要解决的技术问题是提供一种链锯, 该链锯 具有稳定性好且不易磨损、 操作省力锯链张紧装置。
为解决上述技术问题, 本发明的技术方案是这样实现的: 一种链锯, 包括 一个壳体、 设置于所述壳体中且用于驱动锯链的链轮和一个为所述锯链运动导 向的链板, 所述链板沿纵向延伸出所述壳体外部, 且可相对所述壳体纵向移动, 所述链锯还包括一个锯链张紧装置, 其中, 所述锯链张紧装置包括一个设置于 所述链板上的受力件, 一个驱动所述受力件带动链板纵向移动的主动件, 以及 驱动所述主动件的转动装置, 所述转动装置与所述主动件之间设有一无级离合 装置。
进一步地, 所述无级离合装置为一摩檫离合装置, 所述摩檫离合装置的摩 檫力由所述锯链需要的张紧力决定。
所述转动装置与摩檫离合装置之间设置有单向传动装置。所述单向传动装置 包括设置于转动装置上设有卡接件, 以及设置于摩檫离合装置是与卡接件啮合 的斜卡齿, 所述转动装置通过卡接件可单向带动摩檫离合装置转动。
所述链锯进一步包括一个护罩, 所述护罩上设有护罩开口, 所述护罩开口的 下端具有沿护罩开口周向设置的齿形端面; 所述转动装置包括一夹紧套筒, 以 及与夹紧套筒固定配接的手轮; 所述摩檫离合装置设置有防松装置, 所述防松 装置由弹性变形的材料制成,所述防松装置包括与齿形端面单向卡接的齿形件, 以及与手轮紧压配接的斜坡面。
所述摩檫离合装置包括一个提供摩檫压力的弹性件和一摩檫盘组件, 所述 弹性件偏压所述摩檫盘组件;所述摩檫盘组件包括至少一个摩檫盘和一旋转套, 所述旋转套套设于所述摩檫盘外围; 所述摩檫离合装置还包括一可由所述摩檫 盘带动旋转的摩檫盘基座; 所述摩檫盘基座连接所述主动件和所述摩檫盘, 所 述弹性件设置于所述摩檫盘基座和所述摩檫盘之间。 所述转动装置和所述旋转 套之间设有至少一个卡接件, 所述斜卡齿设置于旋转套外圆周面上, 所述卡接 件在锯链张紧过程中驱动所述旋转套与所述转动装置同步运动。
更进一步地, 所述主动件构造为一偏心轮, 所述受力件构造为一固定于所 述链板的挡头。
一种链锯, 包括一个壳体、 设置于所述壳体中且用于驱动锯链的链轮和一 个为所述锯链运动导向的链板, 所述链板沿纵向延伸出所述壳体外部, 且可相 对所述壳体纵向移动, 所述链锯还包括一个锯链张紧装置, 所述锯链张紧装置 包括一个设置于所述链板上的受力件, 一个驱动所述受力件带动链板纵向移动 的主动件, 以及驱动所述主动件的转动装置, 设置于转动装置与所述主动件之 间的离合装置, 所述转动装置与离合装置之间设置有单向传动装置。
所述单向传动装置包括设置于转动装置上的卡接件, 以及设置于离合装置 的斜卡齿, 所述卡接件与斜卡齿单向卡接配合。
所述离合装置构造为摩檫离合装置; 所述摩檫离合装置的摩檫力相应于所 述锯链需要的张紧力来调节。
另一种可替代的方案是所述离合装置构造为卡接离合装置, 所述卡接离合 装置的卡接力相应于所述锯链需要的张紧力来调节。 所述主动件构造为齿轮, 所述受力件构造为与齿轮啮合配接的齿条组件。 所述卡接离合装置包括第一卡 接件与第二卡接件, 以及使第一卡接件与第二卡接件之间产生作用力的弹性元 件, 所述弹性元件为所述第一卡接件与第二卡接件提供卡接离合力。 所述齿条 组件进一步包括至少一个防松齿, 所述张紧装置还包括一设置于所述卡接离合 装置与链板之间的防松装置, 所述防松装置与防松齿在锯链张紧时啮合配接对 链板进行限位。
本发明的链锯具有一在张紧锯链的同时压紧链板的张紧装置, 并且能防止 张紧松脱, 该锯链张紧装置结构稳定、 不易磨损且操作省力。
附图说明
下面结合附图和实施例对本发明作进一步说明:
图 1 是本发明的第一实施例中链锯在护罩移掉后的局部主视图。
图 2是本发明的第一实施例中链锯的张紧装置剖视图。
图 3是本发明的第一实施例中链锯的张紧装置立体分解示意图。
图 4是本发明的第一实施例中摩檫力离合装置的俯视方向示意图。
图 5是本发明的第一实施例中链锯的手轮啮合旋转套立体示意图。
图 6是本发明的第二实施例中链锯的张紧装置剖视图。
图 7是本发明的第二实施例中链锯的张紧装置立体分解示意图。
图 8是图 7中链锯张紧装置局部放大示意图。
其中: 5 链锯 37 螺栓 224 第二离合件
6 壳体 37a 外螺丈部 225 齿轮
7 链轮 91 挡头 226 防松装置
9 链板 93 长形孔 228 挡圈
10 摩檫离合装置 131 护罩开口 238 开孔
11 锯链 132 齿形端面 241 第二卡接件
13 护罩 151 手轮 251 齿条
15 转动装置 152 夹紧套筒 252 防松齿
16 卡接件 152a 内螺紋部 261 扭簧
16a 卡接部分 155 围壁 262 连接件
17 限位压簧 155a 斜坡面 266 防松齿
18 摩檫盘螺钉 153 中心轴线 271 环形摩檫片
19 第一摩檫盘 160 螺钉 272 凸条
21 第二摩檫盘 161 扭簧 273 斜卡齿
23 第三摩檫盘 162 连接件 274 斜卡齿
25 第四摩檫盘 211 凹口 281 手轮
27 旋转套 215 齿条组件 282 夹紧套筒
29 压簧 216 卡接件 283 中心轴线
31 摩檫盘基座 216a 卡接齿 311 连接件
33 偏心轮 217 螺钉 312 防松装置
33a 外弧面 218 转动装置 312a 斜坡面
33b 通孔连接部 220 弹簧 312b 齿形件
35 压块 221 第一卡接件 313 偏心轮连接件
36 挡圈 222 第一离合件 400 卡接离合装置 具体实施方式
如图 1 所示, 本发明一具体实施方式中, 所涉及的链锯 5包括一个壳体 6, 一个用于驱动锯链 11 的链轮 7 可转动的支承在该壳体 6 中, 其中, 该链轮 7 通过一个传动装置由一动力装置驱动 (图中未示出), 该动驱动装置可以设置为 电机或者引擎; 该链锯 5还包括一个链板 9, 该链板 9一端支承于壳体 6 内, 另一端在该链板 9纵向方向延伸出该壳体 6, 锯链 11 套设在所述链轮 7和链板 9上, 并能沿着该链板 9边缘循环的被引导。 为了调节锯链 11 的张力, 该链板 9 可顺着该链板 9 纵向延伸方向相对所述壳体 6移动, 使得该链板 9 与链轮 7 之间的间距可变化大小, 从而使得所述锯链 11 可被张紧或松弛。
如图 2、 图 3所示, 为张紧所述锯链 11 并且将所述链板 9 固定在壳体 6上 的一个适合于所调节出的锯链 11 张紧力的位置上,该链锯 5设有一个锯链张紧 装置, 该张紧装置被安置于一个用于封闭壳体 6的护罩 13 中。 其中, 该张紧装 置包括一个可转动的靠近链板 9一侧的偏心轮 33、 一个控制偏心轮 33转动的 转动装置 15和一摩檫离合装置 10, 所述偏心轮 33的外弧面 33a抵靠着一个固 定连接于链板 9的挡头 91, 当转动装置 15操作所述偏心轮 33转动时, 该偏心 轮 33抵靠所述挡头 91 并推动该挡头 91 沿所述链板 9 纵向延伸方向朝壳体 6 外纵向移动,随即所述挡头 91 带动所述链板 9沿着链板 9纵向延伸方向朝离开 壳体 6方向纵向移动, 使得链板 9远离链轮 7, 从而张紧所述锯链 11, 其中, 所述偏心轮 33还可构造为蜗轮、 齿轮等, 所述挡头 91 还可构造为配合蜗轮、 齿轮的蜗杆、 齿条等, 只要能使得所述转动装置 15通过传动后驱使所述链板 9 顺着该链板 9纵向延伸方向相对所述壳体 6移动即可。
所述摩檫离合装置 10是设置于该转动装置 15与偏心轮 33之间的旋转连接 装置, 用于连接所述转动装置 15和所述偏心轮 33。 该摩檫离合装置 10通过其 上的摩檫器件来产生摩檫离合力,所述摩檫离合力是指当摩檫离合装置 10离合 时, 摩檫器件上的摩檫力所达到的极限值。该摩檫离合力对应于锯链 11 所需最 佳锯链张力已预先调整好该其摩檫离合力大小。在张紧过程中, 当锯链 11 完全 落入链板 9纵向边缘的导向槽内并同时被张紧时, 链板 9移动阻力慢慢提高, 转动装置 15继续转动, 直到移动链板 9被锯链 11 产生的束縛力超过了摩檫离 合装置 10 中的摩檫离合力后,摩檫离合装置 10使得转动装置 15不能带动所述 偏心轮 33转动, 转动装置 15继续完成压紧链板 9工作, 而此时偏心轮 33则保 持静止状态, 即锯链 11 保持一定的张紧力不变。 因此, 摩檫离合装置 10可确 保了锯链 11 在操作完锯链张紧后总是具有相同的锯链张力,这个张力是由在工 厂中预先调节出的摩檫离合装置 10的摩檫离合力决定的,与使用者的个人感觉 无关, 使得在锯链张紧过程中使用者可方便的张紧到为最佳工作过程而预先设 计好的锯链张力状态。
在本发明最佳实施方式中,所述转动装置 15包括一个夹紧套筒 152和一个 与该夹紧套筒 152相对静止的手轮 151, 所述夹紧套筒 152有一中心轴线 153, 所述偏心轮 33与所述夹紧套筒 152可通过所述摩檫离合装置 10配合连接, 所 述夹紧套筒 152 中心轴线 153与所述偏心轮 33转动轴中心线同轴。该夹紧套筒 152 内部构成为一内螺紋部 152a,夹紧套筒 152通过该螺紋部 152a和一个端部 固定于壳体 6中并垂直该壳体 6伸出, 且穿过所述链板 9上设置的纵向延伸的 长形孔 93的螺栓 37的外螺紋部 37a配合, 使得该夹紧套筒 152垂直所述链板 9设置。 其中, 该夹紧套筒 152在靠近链板 9一端套设有一个压块 35, 该压块 35用于所述摩檫离合装置 10和所述链板 9之间对所述偏心轮 33进行限位, 并 在链锯 5张紧后用于压紧链板 9, 以保持链锯 5的张紧度, 使得在工作过程中, 锯链 11 不会因链锯 5 的震动而松弛, 对用户造成危险。 同时, 所述夹紧套筒 152在靠近链板 9的一端上还套有一挡圈 36, 该挡圈 36用于限位所述压块 35, 以防止该压块 35从该夹紧套筒 152 中脱出, 保证结构的稳定性。 而该夹紧套筒 152 的另一端被一与该夹紧套筒 152相对静止的手轮 151 所包围, 以方便用户 操作该夹紧套筒 152, 为此, 夹紧套筒 152与手轮 151 嵌合配接, 保证手轮 151 带动夹紧套筒 152—起运动。 另外, 在手轮 151 的内侧具有沿周向设置的围壁 155, 所述围壁 155的末端部形成斜坡面 155a。
所述转动装置 15穿过所述护罩 13上与夹紧套筒 152 同轴的圆形的护罩开 口 131, 该护罩开口 131 与所述手轮 151 形状配合, 使得该手轮 151 可插入所 述护罩开口 131 中, 且可带动所述夹紧套筒 152相对护罩 13转动, 从而方便的 对张紧锯链进行操作。 另外, 该护罩开口 131 的下端部具有沿开口周向设置的 齿形端面 132。
如图 2 至图 4所示, 所述摩檫离合装置 10 包括摩檫盘组件、 摩檫盘基座
31 和压簧 29, 其中, 摩檫盘组件包括第一摩檫盘 19、 第二摩檫盘 21、 第三摩 檫盘 23、 第四摩檫盘 25 和旋转套 27, 所述摩檫盘基座 31 在靠近所述偏心轮
33 一侧设有一偏心轮连接件 313, 该偏心轮连接件 313 和所述摩檫盘基座 31 构造为一体, 并配合所述偏心轮 33 上设有的通孔连接部 33b 连接所述偏心轮
33, 使得所述偏心轮连接件 313连接所述偏心轮 33后, 所述偏心轮 33与所述 偏心轮连接件 313能够保持相对静止。 此外, 所述摩檫盘基座 31 在背向所述偏 心轮 33的一侧设置有至少一个摩檫盘连接件 311, 在本发明最佳实施方式中, 该摩檫盘基座 31 共设有三个摩檫盘连接件 311, 且每个摩檫盘连接件 311 均构 造为一中空螺紋柱状。 所述第一摩檫盘 19、 第三摩檫盘 23、 第四摩檫盘 25通 过摩檫盘螺钉 18穿过其上设置的配合所述摩檫盘连接件 311的连接孔连接所述 摩檫盘连接件 311。 其中, 第四摩檫盘 25 靠近所述摩檫盘基座 31 设置, 并和 第一摩檫盘 19 间设置有第二摩檫盘 21 和第三摩檫盘 23, 该第二摩檫盘 21 夹 紧于所述第一摩檫盘 19和第三摩檫盘 23之间, 且可活动的套设于所述摩檫盘 连接件 311 上, 所述旋转套 27支承于所述摩檫盘基座 31 背向偏心轮 33—侧, 并在其中可容纳该第一至第四摩檫盘,该旋转套 27包括外圆周面构成的斜卡齿 273、内圆周面设置有的环形摩檫片 271 和设置于所述环形摩檫片 271 上方的凸 条 272, 其中, 所述环行摩檫片 271 设置于第三摩檫盘 23和第四摩檫盘 25之 间, 将第三摩檫盘 23和第四摩檫盘 25相分开, 该凸条 272可配合连接第二摩 檫盘 21 边缘设置的四口 211, 使得所述第二摩檫盘 21 可相对静止的连接所述 旋转套 27上。 而所述的压簧 29—端偏压所述摩檫盘基座 31, 另一端偏压所述 第四摩檫盘 25, 以提供所述摩檫盘压力, 从而产生相应的摩檫力。 值得一提的 是: 第一摩檫盘 19、 第二摩檫盘 21、 第三摩檫盘 25、 第四摩檫盘 27和摩檫盘 基座 31 上设置的环形摩檫片 271 均具有较大的摩檫系数,而摩檫力的大小可通 过压簧 29 给它们的偏压力大小进行调整。 同时, 所述第一摩檫盘 19、 第二摩 檫盘 21、 第三摩檫盘 23、 第四摩檫盘 25和摩檫盘基座 31 均开有与所述夹紧套 筒 152的中心轴线 153 同轴的开孔, 所述夹紧套筒 152穿过它们的开孔后连接 所述螺栓 37, 另外, 在与所述夹紧套筒 152 固定连接的手轮 151 和第一摩檫盘 19 间安装有一限位压簧 17, 该限位压簧 17偏压所述手轮 151 和所述第一摩檫 盘 19, 给所述摩檫离合装置 10—限位力, 防止该摩檫离合装置 10在夹紧套筒 152的中心轴线 153上轴向移动,造成张紧装置不够稳定。参照图 3、 图 4所示, 所述摩檫盘基座 31 的主体部设有多个沿周向均 设置的防松装置 312, 本实施 例中防松装置 312数量设置为三个, 每个防松装置 312上设有向手轮 151 方向 凸出的斜坡面 312a, 该斜坡面 312a 可选择地与设置于手轮 151 内侧围侧 155 的斜坡 155a啮合配接; 另外在每个斜面面 312a的同一侧设置齿形件 312b, 该 齿形件 312b可选择地与设置于护罩开口 131 的齿形端面 132啮合,本实施例中 的齿形件 312b数量为二个, 该摩檫盘基座 31 上的齿形件 312b及斜坡面 312a 均由能产生弹性变形的材料制成的。
为了方便手轮 151 驱动所述摩檫离合装置 10进行锯链张紧,且在松弛所述 锯链 11 时不需克服较强的摩檫力, 如图 3所示, 所述手轮 151 内圈边缘通过螺 钉 17活动连接有至少一个卡接件 16, 本实施例中的卡接件 16设有三个 (参照 图 5), 该卡接件 16包括连接所述手轮 151 的连接部分和形状配合所述斜卡齿 273设置的卡接部分 16a, 为配合所述卡接件 16的连接部分, 手轮 151 内圈边 缘设有相应的配合所述螺钉 160的连接件 162, 并在每个所述卡接件 16连接部 分和手轮 151 连接件 162之间设有扭簧 161, 该扭簧 161 可给所述卡接件 16卡 接部分 16a—个朝向手轮 151 中心的弹性力, 使得在手轮 151 连接所述摩檫离 合装置 10时,该卡接件 16的卡接部分 16a可与所述的旋转套 27外围的斜卡齿
273单向卡接啮合, 从而在转动装置 15 与摩檫离合装置 10之间形成一单向传 动装置, 即卡接件 16只可单向带动斜卡齿 273旋转, 而反向旋转时卡接件 16 带不动斜卡齿 273旋转。该单向传动装置使得在旋转所述转动装置 15时, 手轮
151 带动该卡接件 16旋转, 从而带动所述旋转套 27旋转; 当更换锯链时, 需 要先拆卸链板, 此时反向转动装置 15, 该卡接件 16的卡接部分 16a 可在该斜 卡齿 273上进行爬行, 使得该旋转套 27保持静止而手轮 151 继续旋转, 并带动 夹紧套筒 152脱离设置于壳体 6的螺栓 37, 从而让护罩 13 带动张紧装置从链 锯 5上脱下。 所述单向传动装置除了用本实施例中揭示的单爪棘轮机构以外, 本领域的技术人员可用机械手册公开的其它的单向传动装置比如单向离合器、 单向轴承以及其它端齿式棘轮机构、 内接式棘轮机构、 扇形块式棘轮机构等实 现转动装置 15与摩檫离合装置 10之间的单向传动。 当然采用液压、 或气动的 单向阀也可以实现单向液压或气动传动。
通过上述结构, 本发明链锯的锯链 11 张紧和链板 9压紧是这样实现的: 当 用户拿到链锯 5需要张紧锯链 11 时, 首先将所述护罩 13扣在所述壳体 6上的 相应位置, 使安置于护罩 13上的张紧装置的转动装置 15对准穿过链板 9的螺 栓 37, 其次, 转动所述手轮 151, 使该手轮 151 带动所述夹紧套筒 152通过螺 紋配合在所述螺栓 37上对着链板 9进行轴向移动, 与此同时, 该手轮 151 通过 其上连接的卡接件 16卡接部分 16a和旋转套 27外围的斜卡齿 273配合, 带动 旋转套 27同步转动, 使得旋转套 27带动与其上凸条 272相配合连接的第二摩 檫盘 21 同步转动, 并在通过弹簧 29作用产生的摩檫力下, 带动第一摩檫盘 19 和第三摩檫盘 23 同步转动, 同时, 旋转套 27也通过摩檫力作用, 带动第三摩 檫盘 23和第四摩檫盘 25 同步转动, 再加之第一、 第三、 第四摩檫盘被摩檫盘 螺钉 18 固定连接于摩檫盘基座 31, 故可带动摩檫盘基座 31 进行同步转动, 使 得摩檫盘基座 31 带动连接其上的偏心轮 33 同步转动并作用链板 9纵向移动, 锯链 11 开始张紧, 此时, 锯链 11 的张紧力小于在工厂预先设置的摩檫离合装 置 10 中的弹簧 29偏压摩檫盘所产生的摩檫力。 继续转动手轮 151, 当锯链 11 张紧达到了在工厂预先设置的最优张紧力后, 链锯 5锯链张紧完成, 此时, 锯 链 11 的张紧力对链板 9的反作用力形成一束縛力,该束縛力通过链板 9上设置 的挡头 91 传递到与该挡头 91 配合的偏心轮 33上,且进一步传递到设置于偏心 轮 33和转动装置 15之间的摩檫离合装置 10上, 此时, 在锯链完成张紧后, 该 反作用力大小超过了上述的摩檫离合力, 继续旋转手轮 151, 摩檫离合器受张 紧力对偏心轮 33产生的反作用力影响, 进行离合, 在本实施方式中, 即第一摩 檫盘 19、 第三摩檫盘 23和第二摩檫盘 21 克服之间的摩檫力而脱开, 同时, 第 三摩檫盘 23、 第四摩檫盘 25和旋转套 27克服之间的摩檫力而脱开, 从而使得 摩檫盘基座 31 停止转动, 偏心轮 33保持静止, 锯链 11 张紧度保持不变。 值得 一提的是:为了稳定摩檫离合装置 10而设置了具有相互摩檫连接的四个摩檫盘 和一个旋转套 27只是本发明的最佳实施方式, 但实际上, 只需要两个可以相互 摩檫的件即可根据它们之间的摩檫力来实现本发明的摩檫离合装置 10的作用。 手轮 151 继续旋转并带动夹紧套筒 152以及夹紧套筒 152连接的压块 35继续向 链板 9 方向移动, 压紧链板 9。 此时, 在压紧力的作用下, 防松装置 312上的 斜坡面 312a与手轮 151 内侧围侧 155的斜坡 155a相互啮合且相互挤压, 致使 防松装置 312径向向外产生一个弹性变形,而齿形件 312b在径向方向上与设置 于护罩开口 131 的齿形端面 132相啮合, 形成又一棘轮装置, 即当手轮 151 旋 转至张紧链板且压紧链板的状态时, 摩檫离合装置 10与护罩 13 自动地锁紧在 一起, 从而保证了链板 9在工作过程中不会松脱。 而当需要更锯链时, 反向转 动装置 15带动夹紧套筒 152于螺栓 37上产生相对压紧方向的位置, 从而使得 手轮 151 内侧围侧 155的斜坡 155a与防松装置 312上的斜坡面 312a脱开啮合, 防松装置 312恢复弹性变形,防松装置 312上的齿形件 312b 自动脱开与护罩开 口 131 的齿形端面 132的啮合, 即防松结构自动解除了锁定; 此时继续反向转 动手轮 151, 直至夹紧套筒 152 脱离设置于壳体 6 的螺栓 37, 从而让护罩 13 带动张紧装置从链锯 5上脱下。
本实施例所采用的摩檫力离合装置 10属于一种无级离合装置,即在离合时 各离合元件间没有位置的要求, 即相互之间没有突变, 不同于前案揭示的卡接 离合器中的卡接件之间在离合时会有位置要求; 当然本领域的技术人员还可以 按照本实施例而构思设置其它类型的无级离合装置。
如图 6、 图 7、 图 8所示, 为本发明的第二个实施例, 所涉及的链锯与上述 第一实施例大致相同, 不同之处在于使用了不同的锯链张紧结构, 为表述方便, 相同的部件同一标号表示后不作重复赘述, 不同的部件以新的标号表示。
该张紧装置包括一个可转动的靠近链板 9 一侧的齿轮 225、 一个固定设置 于链板 9上的配合所述齿轮 225的齿条组件 215、 一个控制该齿轮 225转动的 转动装置 218和一卡接离合装置 400。 所述齿轮 225 与所述齿条组件 215上的 齿条 251 相互配合, 当转动装置 218操作所述齿轮 225转动时, 该齿轮 225啮 合齿条 251, 推动所述齿条 251 向所述壳体级向向外移动, 随即所述齿条组件 21 5带动所述链板 9沿着相同方向朝壳体外移动, 使得链板 9远离链轮 7, 从而 张紧所述锯链 (图中未示出)。
所述卡接离合装置 400是设置于该转动装置 21 8与该齿轮 225之间的旋转 连接装置, 用于连接所述转动装置 21 8 和所述齿轮 225。 该卡接离合装置 400 包括第一离合件 222、 第二离合件 224 和弹簧 220, 在所述卡接离合装置 400 中,齿轮 255无相对转动地设置于第二离合件 224的靠近齿条组件 21 5的一侧, 而第二离合件 224的相对的另一侧则构造成为第一卡接件 221,第一离合件 222 的第一卡接件 221 与第二离合件 224的第二卡接件 241 正对卡合设置, 所述弹 簧 220设置于第一离合件 222与手轮 281 之间, 该弹簧 220两端分別抵靠手轮 281 的第一离合件 222。 并且给第一离合件 222—朝向第二离合件 224的力。 并 通过所述的第一离合件 222、 第二离合件 224和弹簧 220相配合来产生卡接离 合力, 其中, 卡接离合力是指所述的第一离合件 222的第一卡接件 221 与第二 离合件 224的第二卡接件 241 相互啮合卡接的力, 所述弹簧 220在第一离合件 222和第二离合件 224的轴向上偏压第一离合件 222抵靠第二离合件 224,从而 使第一离合件 222和第二离合件 224之间存在一定压力, 当卡接离合装置 400 进行离合时, 所述第一离合件 222给第二离合件 224的压力所达到的极限值。 该卡接离合力对应于锯链所需最佳锯链张力已预先调整好该其卡接离合力大 小, 即对应于锯链所需要的张力调整好卡接离合装置中 400的弹簧力。 这个张 力是由在工厂中预先调节出的卡接离合装置 400的卡接离合力决定的, 与使用 者的个人感觉无关, 使得在锯链张紧过程中使用者可方便的张紧到为最佳工作 过程而预先设计好的锯链张力状态。 即在张紧过程中, 当锯链完全落入链板 9 纵向边缘的导向槽内并同时被张紧时,链板 9移动阻力慢慢提高,转动装置 21 8 继续转动, 直到移动链板 9被锯链产生的束縛力超过了卡接离合装置 400 中的 卡接离合力后, 卡接离合装置 400使得转动装置 21 8不能带动所述齿轮 225转 动, 转动装置 21 8继续完成压紧链板 9工作, 而此时齿轮 225则保持静止状态, 即锯链 2保持一定的张紧力不变。 因此, 卡接离合装置 400可确保了锯链在操 作完锯链张紧后总是具有相同的锯链张力。 其中第一离合件 222的周向外壁设 置有斜卡齿 274。
在本实施方式中, 所述张紧装置的转动装置 21 8包括一个夹紧套筒 282和 一个与该夹紧套筒 282相对静止的手轮 281, 夹紧套筒 282端部与手轮 281 嵌 合连接以方便操作者操作控制; 所述夹紧套筒 282 具有一中心轴线 283, 并在 所述中心轴线 283方向依次穿过卡接离合装置 400的弹簧 220、第一离合件 222、 第二离合件 224, 以及固定设置于所述第二离合件 224上的齿轮 225, 且所述夹 紧套筒 282 中心轴线 283 与所述弹簧 220、 第一离合件 222、 第二离合件 224 和齿轮 225转动轴中心线同轴。 其中, 手轮 281 内侧通过螺钉 21 7活动连接有 至少一个卡接件 21 6, 该卡接件 21 6包括与第一离合件 222斜卡齿 274形状配 合的卡接齿 21 6a,为配合所述卡接件 21 6连接, 手轮 281 上设有相应地所述螺 钉 21 7的连接件 262, 并在每个卡接件 21 6与手轮 281 之间设置扭簧 261, 该扭 簧 261 可给所述卡接件 21 6卡接齿 21 6a—个朝向手轮 281 中心的弹性力,使得 在手轮 281 连接所述摩檫离合装置 400时,该卡接件 21 6卡接齿 21 6a可与第一 离合件 222的周向外壁的斜卡齿 274单向卡接啮合, 从而在转动装置 21 8与摩 檫离合装置 400之间形成一单向传动装置, 该单向传动装置使得在旋转转动装 置 21 8时, 手轮 281 旋转带动卡接件 21 6旋转, 而卡接件 21 6只可单向带动斜 卡齿 274旋转, 即带动第一离合件 222旋转, 从而使得第一离合件 222与第二 离合件 224之间卡接连接带动齿轮 225对锯链进行张紧; 当更换锯链时, 需要 反向旋转转动装置 281,卡接件 21 6的卡接齿 21 6a仅在斜卡齿 274上进行爬行, 不再带动第一离合件 222旋转, 此时第一离合件 222保持静止而手轮 281 继续 反向旋转, 并带动夹紧套筒 252 反向旋转脱离与螺栓 37 的啮合, 从而让护罩 1 3 带动张紧装置从链锯上脱下。 因此操作者在更换锯链时反向旋转转动装置 21 8不需要克服卡接离合装置 400的第一卡接件 222 与第二卡接件 224之间的 卡接阻力。 所述单向传动装置除了用本实施例中揭示的单爪棘轮机构以外, 本 领域的技术人员可用机械手册公开的其它的单向传动装置比如单向离合器、 单 向轴承以及其它端齿式棘轮机构、 内接式棘轮机构、 扇形块式棘轮机构等实现 转动装置 21 8与摩檫离合装置 400之间的单向传动。 当然采用液压、 或气动的 单向阀也可以实现单向液压或气动传动。
所述张紧装置还包括一在该夹紧套筒 282靠近链板 2—端套设的防松装置 226, 该防松装置 226设置于所述卡接离合装置 400和所述链板 9之间。 其中, 该防松装置 226包括一与夹紧套筒 282 中心轴线 283 同轴的开孔 238, 该夹紧 套筒 282穿过其开孔 238与螺栓 37螺紋连接,该防松装置 226靠近链板 9一侧 的圆周边上至少设有一个第二防松齿 266, 该第二防松齿 266 可与所述齿条装 置 21 5上配合其设置的第一防松齿 252相互补的啮合, 张紧装置还包括套设于 夹紧套筒 282靠近链板 9一端的挡圈 228, 该挡圈 228用于限位防松装置 26 以 及卡接离合装置 400, 以防止该防松装置 226和卡接离合装置 400从该夹紧套 筒 282 中脱出, 保证了所述张紧装置的稳定性。 当链锯张紧后进一步旋转转动 装置 21 8时, 夹紧套筒 282 以及与夹紧套筒 282连接的防松装置 226继续向链 板 9 方向移动, 从而压紧链板 9。 此时在压紧力的作用下, 防松装置 226的防 松齿 266与齿条组件 21 5的防松齿 252啮合压紧形成一棘轮装置, 从而保持链 锯的张紧度和链板 9的压紧度, 有效避免因链锯 5工作时锯链震动后松弛; 同 时, 也防止了因锯链松弛而造成的跳链, 保证了用户的安全。
所述夹紧套筒 282穿过所述护罩 1 3上一个与夹紧套筒 282同轴的圆形护罩 开口 239, 该护罩开口 239 与所述手轮 281 形状配合地使得该手轮 281 可插入 所述护罩开口 239 中, 且可带动所述夹紧套筒 282相对护罩 1 3转动, 挡圈 228 设置在护罩 1 3背向手轮 281 的另一侧, 限位所述张紧装置, 使得该张紧装置可 安置于该护罩 1 3 中, 可随护罩 1 3—同取下, 脱离壳体 6。
通过上述结构, 本实施方式中链锯的锯链张紧和链板压紧是这样实现的: 当用户拿到链锯 5需要张紧锯链时,首先将所述护罩 1 3连同张紧装置扣在壳体
6 上的相应位置, 即护罩 1 3 完全覆盖壳体 6 上的链轮 7 和部分容纳于壳体 6 上的链板 9, 同时夹紧套筒 282对准垂直壳体 6延伸出的螺栓 37。 之后转动手 轮 281, 手轮 281 带动所述夹紧套筒 282通过螺紋配合在所述螺栓 37上朝向所 述链板 9轴向移动, 同时通过与该夹紧套筒 282相对静止的第一离合件 222带 动与其啮合的第二离合件 224 转动来带动与第二离合件 224 相对静止的齿轮
225转动, 齿轮 225作用固定于链板 9上的齿条装置 21 5的齿条 251, 带动该齿 条 251 相对壳体 6朝所述壳体 6外纵向移动, 从而使得链板 9相对所述壳体 6 朝所述壳体 6外纵向移动, 锯链开始张紧。 在锯链张紧的过程中, 锯链的张紧 力对链板 9的反作用力形成的束縛力通过链板 9上设置的齿条装置 21 5传递到 与该齿条装置 21 5 中的齿条 251 相配合的齿轮 225上, 且进一步传递到设置于 齿轮 225和转动装置 21 8之间的卡接离合装置 400上。 转动手轮 281, 在锯链 的张紧力小于在工厂预先设置的卡接离合装置中的卡接离合力时, 锯链开始张 紧; 当锯链张紧达到了在工厂预先设置的最优张紧力后, 继续转动手轮 281, 该反作用力大于所述的卡接离合力, 所述卡接离合装置受该反作用力影响, 卡 接离合装置中的第一离合件 222上的第一卡接件 221 与第二离合件 224上的第 二卡接件 241 脱开, 由于本实施方式中的卡接件设置顾卡齿, 因此第一卡接件
221 上的齿于第二卡接件 241 上的齿上进行爬齿运动, 第一离合件 222 无法带 动第二离合件 224运动, 卡接离合装置 400发生离合。 齿轮 225保持当前静止 状态静止, 锯链张紧度保持不变。 在锯链张紧后, 手轮 281 继续旋转, 带动夹 紧套筒 282 以及夹紧套筒 282连接的防松装置 226继续向链板 9方向移动, 压 紧链板 9, 同时, 防松装置 926上的第二防松齿 266啮合链板 9上齿条装置 21 5 的第一防松齿 252从而锁定链板 9的位置, 完成锯链张紧和链板锁紧, 并能实 现锯链的防松, 操作简单, 省力。

Claims

权 利 要 求 书
1. 一种链锯, 包括一个壳体 ( 6)、 设置于所述壳体( 6) 中且用于驱动锯链( 11 ) 的链轮 (7) 和一个为所述锯链 (11 ) 运动导向的链板 (9), 所述链板 (9) 沿 纵向延伸出所述壳体 (6) 外部, 且可相对所述壳体 (6) 纵向移动, 所述链锯 (5) 还包括一个锯链张紧装置, 其特征在于: 所述锯链张紧装置包括一个设置 于所述链板 (9) 上的受力件, 一个驱动所述受力件带动链板 (9) 纵向移动的 主动件, 以及驱动所述主动件的转动装置 (15), 所述转动装置 (15) 与所述主 动件之间设有一无级离合装置。
2. 根据权利要求 1 所述的链锯, 其特征在于: 所述无级离合装置为一摩檫离合 装置 (10), 所述摩檫离合装置的摩檫力相应于所述锯链 (11 ) 需要的张紧力来 调节。
3. 根据权利要求 2所述的链锯, 其特征在于: 所述转动装置 (15) 与摩檫离合 装置 (10) 之间设置有单向传动装置。
4. 根据权利要求 3所述的链锯, 其特征在于: 所述单向传动装置包括设置于转 动装置 (15) 上设有卡接件 (16), 以及设置于摩檫离合装置 (10) 上与卡接件 啮合的斜卡齿 (273), 所述转动装置 (15) 通过卡接件 (16) 可单向带动摩檫 离合装置 (10) 转动。
5. 根据权利要求 4所述的链锯, 其特征在于: 所述摩檫离合装置 (10) 包括一 个提供摩檫压力的弹性件 (29) 和一摩檫盘組件, 所述弹性件偏压所述摩檫盘 組件。
6. 根据权利要求 5所述的链锯, 其特征在于: 所述摩檫盘組件包括至少一个摩 檫盘 (19、 21、 23、 25) 和一旋转套 (27), 所述旋转套 (27) 套设于所述摩檫 盘 (19、 21、 23、 25) 外围。
7.根据权利要求 6所述的链锯, 其特征在于: 所述摩檫离合装置 (10) 还包括 一可由所述摩檫盘 (19、 21、 23、 25) 带动旋转的摩檫盘基座 (31)。
8. 根据权利要求 7所述的链锯, 其特征在于: 所述摩檫盘基座 (31) 连接所述 主动件和所述摩檫盘 (19、 21、 23、 25), 所述弹性件 (29) 设置于所述摩檫盘 基座 (31 ) 和所述摩檫盘 (19、 21、 23、 25) 之间。
9. 根据权利要求 8所述的链锯, 其特征在于: 所述转动装置 (15) 和所述旋转 套 (27)之间设有至少一个卡接件(16), 所述斜卡齿 (273)设置于旋转套 (27) 外圆周面上, 所述卡接件 (16) 在锯链 (11 ) 张紧过程中驱动所述旋转套 (27) 与所述转动装置 (15) 同步运动。
10. 根据权利要求 1 至 9的任意一项所述的链锯, 其特征在于: 所述主动件构 造为一偏心轮 (33), 所述受力件构造为一固定于所述链板 (9) 的挡头 (91)。
11. 一种链锯, 包括一个壳体(6)、装承在所述壳体(6) 中且用于驱动锯链(11) 的链轮 (7) 和一个为所述锯链 (11 ) 运动导向的链板 (9), 所述链板 (9) 沿 纵向延伸出所述壳体 (6) 外部, 且可相对所述壳体 (6) 纵向移动, 所述链锯
(5) 还包括一个锯链张紧装置, 其特征在于: 所述锯链张紧装置包括一个设 置于所述链板 (9) 上的受力件, 一个驱动所述受力件带动链板 (9) 纵向移动 的主动件, 以及驱动所述主动件的转动装置 (215), 设置于转动装置 (215) 与 所述主动件之间的离合装置, 所述转动装置 (215) 与离合装置之间设置的单向 传动装置。
12. 根据权利要求 11 所述的链锯, 其特征在于: 所述单向传动装置包括设置于 转动装置 (215) 上的卡接件 (216), 以及设置于离合装置上的斜卡齿 (274), 所述卡接件 (216) 与斜卡齿 (274) 单向卡接配合。
13. 根据权利要求 12所述的链锯, 其特征在于: 所述离合装置构造为摩檫离合 装置 (10), 所述摩檫离合装置的摩檫力相应于所述锯链需要的张紧力来调节。
14. 根据权利要求 13所述的链锯, 其特征在于: 所述离合装置构造为卡接离合 装置(400), 所述卡接离合装置的卡接力相应于所述锯链需要的张紧力来调节。
15. 根据权利要求 14所述的链锯, 其特征在于: 所述主动件构造为齿轮(225), 所述受力件构造为与齿轮啮合配接的齿条組件 (215)。
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US20110308096A1 (en) 2011-12-22
EP2366513B1 (en) 2015-08-05
US9878463B2 (en) 2018-01-30
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US20180104845A1 (en) 2018-04-19
EP2366513A1 (en) 2011-09-21

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