WO2012041192A1 - 链锯 - Google Patents

链锯 Download PDF

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Publication number
WO2012041192A1
WO2012041192A1 PCT/CN2011/080139 CN2011080139W WO2012041192A1 WO 2012041192 A1 WO2012041192 A1 WO 2012041192A1 CN 2011080139 W CN2011080139 W CN 2011080139W WO 2012041192 A1 WO2012041192 A1 WO 2012041192A1
Authority
WO
WIPO (PCT)
Prior art keywords
chain
friction
disposed
sleeve
saw
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2011/080139
Other languages
English (en)
French (fr)
Inventor
邓伟
杨勇
何明明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Positec Power Tools Suzhou Co Ltd
Original Assignee
Positec Power Tools Suzhou Co Ltd
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 CN 201010512490 external-priority patent/CN102430810B/zh
Priority claimed from CN 201010506979 external-priority patent/CN102430809B/zh
Priority claimed from CN 201010512501 external-priority patent/CN102430811B/zh
Application filed by Positec Power Tools Suzhou Co Ltd filed Critical Positec Power Tools Suzhou Co Ltd
Publication of WO2012041192A1 publication Critical patent/WO2012041192A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/14—Arrangements for stretching the chain saw
    • B27B17/142—Arrangements for stretching the chain saw with adjustment by at least one cam

Definitions

  • the present invention relates to a chain saw, and more particularly to a chain saw having a saw chain tensioning device.
  • European Patent Application Publication No. EP2036688A2 discloses a saw chain structure in which a tensioning saw chain and a guide plate are pressed by a single hand wheel, but the other hand wheel needs to be reversely rotated when the saw chain is replaced.
  • the chain saw includes a sprocket rotatably supported in the housing for guiding the chain on the chain plate, a tensioning assembly for tensioning the chain saw, the tensioning assembly including the chain plate a longitudinally moving shaft wheel mechanism, the shaft wheel mechanism is provided with a ribbed wall on the surface to facilitate reverse rotation operation when the saw chain is replaced, and one side of the shaft wheel mechanism is provided with a spiral meshing with the chain plate projection a groove, so that when the shaft mechanism is rotated, the spiral groove pushes the cam to move the chain plate to move longitudinally to the outside of the casing to tension the saw chain, and the shaft wheel mechanism is provided with a hollow column on the other side of the spiral groove, the hollow column surface Surrounded by an annular clutch member, the outer sle
  • the sliding ring, the annular clutch member and the hollow column are sleeved with each other, wherein the inner circumferential surface and the outer peripheral surface of the annular clutch member are frictionally engaged with the outer surface of the hollow column and the inner circumferential surface of the sliding ring, that is, the inner and outer parts of the annular clutch member
  • the surface is respectively disposed as a friction surface and there is a two-layer friction interface between the hollow column and the sliding ring.
  • the annular clutch member is an annular interference clutch made of wave steel. The annular clutch can transmit a preset torque. When the torque reaches or exceeds the pre-design value, the annular clutch will slip.
  • the technical problem to be solved by the present invention is to provide a chain saw having a saw chain tensioning device which is labor-saving and low in manufacturing cost.
  • a chain saw includes: a housing; a sprocket disposed in the housing and used to drive the saw chain; and a chain plate oriented for the movement of the saw chain,
  • the chain plate extends longitudinally out of the outer casing and is longitudinally movable relative to the casing; a chain tensioning device, the saw chain tensioning device includes a force receiving member disposed on the chain plate, and the driving The force receiving member drives the active member for longitudinal movement of the link plate, and the rotating device for driving the active member, and the friction clutch device disposed between the rotating device and the active member;
  • the friction clutch device includes only two A pair of friction members, the friction members are mutually nested and generate a tangential force.
  • a transmission device is disposed between the rotating device and the friction clutch device.
  • the transmission device includes a latching member connected to the rotating device and a rotating sleeve.
  • the rotating sleeve is provided with a diagonal latching tooth.
  • the engaging component is engaged with the oblique latching tooth to drive the rotating sleeve to rotate.
  • the friction member is disposed in a C shape, and an outer surface of the C-shaped friction member is disposed as a friction surface, and both ends of the opening of the C-shaped friction member are disposed as a bent portion.
  • the saw chain tensioning device further includes a base that is coupled to the C-shaped friction member, the base is provided with an annular flange, and the bent portion of the C-shaped friction member is matched with the opening provided at the annular flange
  • the base further includes a connector that is shaped to engage the active member.
  • the sleeve is provided with an inner circumferential surface that frictionally engages an outer surface of the C-shaped jaw.
  • the friction member is disposed in a ring shape, the inner surface of the annular friction member is disposed as a friction surface, the annular friction member is provided with a mating portion, and the rotating sleeve is provided with a top plate with a notch, the annular friction member The sleeve is sleeved in the sleeve and fixed by the mating portion and the slot.
  • the friction clutch device further includes a base, the base is provided with an annular flange, an inner surface of the annular friction member is frictionally engaged with an outer surface of the annular flange, and the base is further provided with an active member shape Mating connectors.
  • the driving member is disposed as an eccentric wheel, and the eccentric wheel is coupled with the base connecting member, and the force receiving member is disposed to be engaged with the cam surface of the eccentric wheel.
  • the chain saw further includes a shroud for arranging the tensioning device and for closing the casing, the shroud being provided with a shroud opening having a toothed end surface, the base being provided with a locking device,
  • the lockout device includes a toothed member that is selectively engageable with the toothed end face and a ramp face.
  • the anti-loose device is made of a material that is capable of elastic deformation.
  • the rotating device comprises a clamping sleeve and a hand wheel that is relatively stationary with the clamping sleeve, the hand wheel is provided with a slope surface, and the slope surface can be selectively engaged with the slope surface of the locking device,
  • the clamping sleeve is sleeved with a spring.
  • the tensioning mechanism of the chain saw of the present invention can press the chain plate while tensioning the saw chain, which is labor-saving, stable, and relatively low in manufacturing cost.
  • Figure 1 is a partial front elevational view of the chain saw 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 of the present invention.
  • Figure 3 is a perspective exploded view showing the first state of the tensioning device of the chain saw of the present invention.
  • Figure 4 is a perspective exploded view showing the second state of the tensioning device of the chain saw of the present invention.
  • Figure 5 is a schematic plan view of the friction clutch device of the present invention.
  • Figure 6 is a perspective view of the hand wheel engaging rotating sleeve of the chain saw of the present invention.
  • Figure 7 is a perspective exploded view of a second embodiment of the chain saw tensioning device of the present invention.
  • a chain saw 5 includes a housing 6 in which a sprocket 7 for driving the saw chain 1 1 is rotatably supported, wherein the sprocket 7 is rotated by a power unit (not shown) by a transmission, which may be provided as a motor or an engine.
  • the chain saw 5 further includes a chain plate 9 supported at one end in the housing 6, and the other end extending in the longitudinal direction of the chain plate 9 out of the housing 6, and the saw chain 1 1 is sleeved on the sprocket 7 and the chain plate 9, and can be guided along the edge of the chain plate 9 to be guided.
  • the link plate 9 can be moved relative to the housing 6 along the longitudinal extension direction of the link plate 9 such that the spacing between the link plate 9 and the sprocket 7 can be varied, thereby The saw chain 11 can be tensioned or slackened.
  • the tensioning device comprises an eccentric 33 disposed adjacent to the chain plate 9 and movable, a rotating device 15 for controlling and driving the movement of the eccentric 33, and a transmission mechanism 330, wherein the transmission mechanism comprises a friction clutch device 10;
  • the cam surface 33a of 33 abuts against a stop 91 fixedly coupled to the link plate 9, and when the rotary device 15 is operated to rotate the eccentric 33, the eccentric 33 abuts against the stop 9 1 and pushes the stop 91 moves outwardly of the housing 6 along the longitudinal extension direction of the link plate 9, and then the stop 91 drives the link plate 9 to move away from the housing 6 along the longitudinal extension direction of the link plate 9, so that the link plate 9 is away from the sprocket 7, thereby tensioning the saw chain 11.
  • the eccentric 33 can be configured as a worm gear, a gear, or the like.
  • the stop 9 1 can also be configured as a worm, a rack, or the like that can be engaged with the worm wheel and the gear, as long as the rotating device 15 can be driven by the transmission device.
  • the link plate 9 is movable relative to the housing 6 in the longitudinal direction of the link plate 9.
  • the rotating device 15 includes a clamping sleeve 152 and a hand wheel 15 1 that is stationary relative to the clamping sleeve 152.
  • the clamping sleeve 152 has a central axis 1 53
  • the friction clutch device 10 and the eccentric 33 are coupled to the clamping sleeve 152, and the center line of the rotating shaft of the eccentric 33 is coaxial with the central axis 153 of the clamping sleeve 152.
  • the clamping sleeve 152 has an internal threaded portion 152a therein, and the housing 6 is provided with a bolt 37.
  • the bolt 37 is provided with an externally threaded portion 37a, one end of which is fixed to the housing 6, and the other end of which extends perpendicularly to the housing 6 and extends.
  • the clamping hole 152 is disposed in the longitudinal direction of the chain plate 9 along the longitudinal direction of the chain plate 9.
  • the clamping sleeve 152 is engaged with the external thread portion 37a of the bolt 37 through the internal thread portion 152a thereof, and the clamping sleeve 152 is opposite to the chain plate 9. Vertical setting.
  • the clamping sleeve 152 is provided with a pressing block 35 near one end of the chain plate 9, and the pressing block 35 is located between the friction clutch device 10 and the chain plate 9 for limiting the eccentric wheel 33, and in the saw chain 1 After the tensioning, the chain plate 9 is pressed to maintain the tension of the saw chain 1 1 so that the saw chain 1 1 is not slackened by the vibration of the chain saw 5 during operation, posing a danger to the user.
  • a stopper 36 is further fixed on one end of the clamping sleeve 1 52 near the pressing block 35, and the damper 36 is used for limiting the pressing block 35 to prevent the pressing block 35. It is removed from the clamping sleeve 152 to ensure structural stability.
  • the other end of the clamping sleeve 152 is surrounded by a hand wheel 15 1 that is stationary with respect to the clamping sleeve 152.
  • the clamping sleeve 152 is mated with the hand wheel 151 to ensure When the hand wheel 15 1 rotates, the clamping sleeve 152 is driven to move.
  • a circumferential wall 155 is provided on the inner side of the hand wheel 151, and the end portion of the surrounding wall 155 forms a slope surface 155a.
  • the clamping sleeve 152 of the rotating device 15 passes through a circular shroud opening 131 disposed on the shroud 13 coaxially with the clamping sleeve 152, and the hand wheel 151 is shaped to cooperate with the shroud opening 13 1 such that the hand wheel
  • the surrounding wall 155 of the 151 is embedded in the shroud opening 13 1 , the housing portion of the hand wheel 15 1 protrudes from the outside of the shroud 13 , and the lower end portion of the shroud opening 131 is provided along the shroud opening 13 for 1 week.
  • the hand wheel 151 drives the clamping sleeve 152 to rotate relative to the shroud 13, and the operation of the tensioning saw chain can be conveniently performed by the transmission mechanism 330, the friction clutch device 10 and the eccentric wheel 33.
  • the forward rotation referred to herein is relative to the reverse rotation, and the forward rotation generally refers to the direction of the clockwise rotation of the rotating device 15 relative to the chain saw housing 6.
  • the reverse rotation generally refers to the relative rotation of the rotating device 15.
  • the counterclockwise direction of rotation of the saw housing 6 of course, those skilled in the art can also understand the above-mentioned positive and negative rotations.
  • the friction clutch device 10 includes a base 31, a rotating sleeve 27, a C-shaped friction member 19, and a compression spring 29; wherein the base 31 is adjacent to the eccentric 33.
  • the connecting member 3 13 and the base 3 1 are integrally formed, and the eccentric 33 is connected with the through-hole connecting portion 33b of the eccentric 33 so that the connecting member 3 13 is connected After the eccentric 33 is described, the eccentric 33 and the connecting member 313 can remain relatively stationary.
  • the base 31 is provided with an annular flange 300 extending toward the rotating hand wheel 151 on an end surface facing away from the eccentric wheel 33.
  • the outer surface of the annular flange 300 is provided with an opening 302, and the inner side of the annular flange 300 is disposed.
  • the base 3 1 is provided with three connecting pieces 31 1 , and each connecting piece 3 11 is configured as a hollow threaded column.
  • the outer surface of the C-shaped friction member 19 is disposed as a friction surface, and the two adjacent ends of the opening of the C-shaped friction member 19 form an inwardly bent portion 19a, and the C-shaped friction member 19 is sleeved on the base 3 1
  • On the outer surface of the flange 300, and the two opposite bent portions 19a on the C-shaped friction member 19 are respectively engaged in the openings 302 on the surface of the annular flange 3 10, so that the C-shaped friction member 19 is fixed relative to the base 3 1
  • the rotating sleeve 27 is provided with a top plate 17, and the outer circumferential surface of the rotating sleeve 27 is provided with oblique teeth 273, and the inner circumferential surface 27b of the rotating sleeve 27 is disposed such that the friction surface engages with the outer surface
  • the frictional force is such that the rotating sleeve 27 and the C-shaped friction member 19 form a friction pair.
  • the top plate 17 is engaged with the connecting member 31 by a screw 18 passing through a connecting hole 17b provided thereon, thereby accommodating the C-shaped friction member 19 between the rotating sleeve 27 and the base 31.
  • the compression spring 29 is sleeved on the clamping sleeve 152, one end of which is biased to the top plate 17 of the rotating sleeve 27, and the other end of which biases the hand wheel 15 1, so that the friction clutch device 10 can overcome the force of the compression spring 29 relative to the clamping sleeve
  • the barrel 152 produces a certain axial displacement along the central axis 153.
  • the seat 31 and the top plate 17 are respectively provided with an opening 17a coaxial with the central axis 153 of the clamping sleeve 152, so that the clamping sleeve 152 can pass through the opening 17a of the pressing plate 17 and the opening 310 of the base 31 and the bolt 37 connected.
  • the main body portion of the base 31 is provided with a plurality of locking devices 312 which are evenly disposed in the circumferential direction.
  • the number of the locking devices 312 is three, and each of the locking devices 312 is provided with a direction.
  • a slope surface 312a protruding from the hand wheel 151, the slope surface 312a being selectively press-fitted to the slope surface 155a disposed on the surrounding wall 155 of the hand wheel 151; in addition, the same side of each slope surface 312a is provided with a tooth shape
  • the toothed member 312b is selectively engaged with the toothed end surface 132 of the shroud opening 131.
  • the number of the teeth 312b in the embodiment is two, and the tooth shape is provided on the base 31.
  • the piece 312b and the surrounding wall 155 are made of a material that is elastically deformable.
  • the friction clutch device 10 is conveniently driven to tension the saw chain 11 and press the chain plate 9 against the casing 6, and rotate the hand in the opposite direction.
  • the transmission mechanism 330 is set as a one-way transmission mechanism.
  • the inner side of the hand wheel 151 is movably connected to the at least one latching member 16 by means of a screw 160.
  • the latching member 16 of the embodiment is provided with three latching portions 16a for engaging with the peripheral portion of the rotating sleeve 27
  • the teeth 273 are unidirectionally engaged.
  • a corresponding connecting member 162 is disposed on the inner side of the hand wheel 151.
  • the engaging member 16 is connected to the connecting member 162 by a screw 160, wherein the connecting member A torsion spring 161 is disposed between the 162 and the latching member 16, and 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, so that the hand wheel 151 is connected to the
  • the engaging portion 16a of the latching member 16 can be unidirectionally engaged with the oblique latching teeth 273 at the periphery of the rotating sleeve 27, thereby forming a single between the rotating device 15 and the friction clutch device 10.
  • the latching member 16 unidirectionally drives the oblique latch 273 to rotate, and in the reverse rotation, the latch 16 rotates with the movable latch 273.
  • the one-way transmission causes the hand wheel 151 to rotate the card member 16 when the rotating device 15 is rotated in the forward direction, and the catching member 16 drives the rotating sleeve 27 to rotate.
  • the rotating sleeve 27 drives the C-shaped friction member 19 to rotate, because the C-shaped friction member 19 is fixed relative to the base 31.
  • the C-shaped friction member 19 drives the base 31 to rotate, so that the eccentric 33 that is coupled to the base 31 connecting member 313 rotates, and the eccentric 33 abuts against the stop 91 to cause the stop 91 to drive the chain plate 9 along the edge.
  • the longitudinal extension of the chain plate 9 is moved away from the housing 6, and the chain plate 9 is moved away from the sprocket 7 to tension the saw chain 11.
  • the rotating device 15 is reversely rotated to cause the engaging portion 16a of the engaging member 16 to crawl on the oblique engaging teeth 273.
  • the rotating sleeve 27 remains stationary and the hand wheel 151 drives the clamping sleeve 152.
  • the shield 13 can be detached from the chain saw 5 together with the tensioning device.
  • the transmission mechanism 330 in this embodiment, can use other one-way transmission devices disclosed in the mechanical manual, such as a one-way clutch, a one-way bearing, and other end-tooth ratchet mechanisms, an internal ratchet mechanism, a sector-shaped ratchet mechanism, etc. to realize the rotating device 15 and the motor.
  • hydraulic or pneumatic one-way valves can also be used to achieve one-way hydraulic or pneumatic transmission.
  • the tensioning of the saw chain 11 of the chain saw 5 of the present invention and the pressing of the link plate 9 are achieved as follows:
  • the rotating device is first connected.
  • the cover 13 of the 15 is fastened to the corresponding position on the casing 6, so that the clamping sleeve 152 is opposite to the bolt 37 disposed on the casing 6 and passing through the elongated hole 93 of the chain plate 9, and then the hand is rotated forward.
  • the wheel 15 1 causes the hand wheel 15 1 to drive the clamping sleeve 152 to be threaded on the bolt 37 and move axially relative to the chain plate 9 , while the hand wheel 15 1 passes the card connected thereto
  • the engaging portion 16a of the connecting member 16 cooperates with the oblique engaging teeth 273 at the periphery of the rotating sleeve 27 to drive the rotating sleeve 27 to rotate synchronously, so that the rotating sleeve 27 drives the C-shaped friction member 19 by friction with the C-shaped friction member 19.
  • the base 3 1 rotates synchronously, and the base 3 1 drives the eccentric 33 connected thereto to rotate synchronously and actuate the longitudinal movement of the link plate 9, and the saw chain 1 1 starts to be tensioned.
  • the tension of the saw chain 1 1 is smaller than the friction generated by the friction clutch device 10 which is set in advance at the factory.
  • the handwheel 15 Continue to turn the handwheel 15 1.
  • the chain 1 1 is tightened.
  • the tension of the saw chain 1 1 forms a restraining force on the reaction force of the link plate 9, and the restraining force is transmitted to the eccentric 33 engaged with the stop 91 through the stop 91 provided on the link plate 9. And further transmitted to the friction clutch device 10 disposed between the eccentric 33 and the rotating device 15.
  • the reaction force exceeds the frictional clutch force described above, and the hand wheel 15 is continuously rotated.
  • the friction clutch 10 is subjected to the reaction force generated by the tensioning force on the eccentric 33, and is engaged.
  • the inner circumferential surface 27b of the rotary sleeve 27 and the outer wall of the C-shaped friction member 19 are slipped, so that the base 3 1 stops rotating, the eccentric 33 remains stationary, and the tension of the saw chain 11 remains unchanged.
  • the hand wheel 15 1 continues to rotate and drives the clamping sleeve 152 and the clamp 35 connected to the clamping sleeve 152 to continue moving in the direction of the link plate 9 to compress the link plate 9.
  • the operator is blindly mounted, that is, the operator only needs to screw the clamping sleeve 152 of the rotating device 15 to the bolt 37 without
  • the cam surface 33a of the eccentric 33 is aligned with the stop 91. Since the stop 91 does not come into contact with the cam surface 33a of the eccentric 33 during installation, it may only contact the end surface of the eccentric 33, but when clamped
  • the compression spring 29 can elastically compress the direction of the hand wheel 15 1 . As long as the hand wheel 151 drives the clamping sleeve 152 to rotate relative to the bolt 37, the eccentric wheel 33 will rotate accordingly.
  • the friction clutch device 10 When the cam surface 33a of the eccentric 33 is rotated to a position in mesh with the stop 91, the friction clutch device 10 generates a distance away from the hand wheel 15 along the central axis 153 of the clamping sleeve 152 under the force of the compression spring 29. The displacement of the direction, at this time, the cam surface 33a of the eccentric 33 and the stop 91 can be automatically engaged in position.
  • the reverse rotation rotating device 15 drives the clamping sleeve 152 to generate a displacement in the relative pressing direction on the bolt 37, so that the slope 155 a of the inner wall 155 of the hand wheel 151 and the locking device 3 12 The upper slope surface 3 12a is disengaged, and the locking device 3 12 is restored to elastic deformation.
  • the toothed member 3 12b on the locking device 312 is automatically disengaged from the toothed end surface 132 of the shroud opening 13 1 , that is, The lock structure automatically releases the lock; at this point, the handwheel 15 1 is continuously rotated in the opposite direction until the clamp sleeve 152 is disengaged from the bolt 37 provided in the housing 6, and the shield 13 together with the tensioning device can be attached from the chain saw 5 Unloading together.
  • the friction clutch device 10 is a rotary connecting device disposed between the rotating device 15 and the eccentric wheel 33. Since the C-shaped friction member 19 is fixedly coupled with respect to the annular flange 300 of the base 31, the friction clutch device 10 passes through the C-shaped friction device.
  • the workpiece 19 and the rotating sleeve 27 generate a frictional force on one side to realize the tension of the saw chain 1 1 , and the friction member structure which generates the frictional force of the friction on one side by the C-shaped friction member 19 has low processing precision and is convenient for processing and Manufacturing, the resulting manufacturing costs are also greatly reduced.
  • the frictional clutch force required for the friction clutch device 10 corresponds to the optimum saw chain tension required for the saw chain 11 to be adjusted in advance at the factory, regardless of the user's personal feeling, and therefore, the friction clutch device 10 can ensure The saw chain 1 1 always has the same saw chain tension after the saw chain is tensioned.
  • Fig. 7 which is a second embodiment of the present invention, the same structures as those in the first embodiment are denoted by the same reference numerals, and are not described herein.
  • the annular friction member 19' replaces the C-shaped friction member 19, and the top plate 17 of the sleeve 27 is provided with a notch 17c, and the peripheral wall of the annular friction member 19' is provided with a meshing engagement with the notch 17c.
  • the joint portion 19b by the engagement of the notch 17c and the mating portion 19b, causes the annular friction member 19' to be fixedly coupled with respect to the sleeve 27.
  • the annular friction member 19' is sleeved on the annular flange 300 of the base 31 such that a tangential force is generated between the inner surface of the annular friction member 19' of the friction clutch device 10' and the outer surface of the annular flange 300. That is, the annular friction member 19' forms a friction pair with the base annular flange 300, wherein the annular friction member 19' can be made of corrugated steel, or can be made of plastic or other materials, and the annular friction member 19'
  • the provision of the inner surface in a corrugated shape facilitates the design of the frictional force with the annular flange 300.
  • the optimum friction of the Capricorn clutch device 10' is pre-designed according to the tension required to tension the chain.
  • the bent portion 19a which can extend inwardly of the C-shaped friction member 19 in the first embodiment can be disposed.
  • the outwardly extending bent portion is provided with a corresponding mating portion on the rotating sleeve 27, and the position of the C-shaped friction member 19 and the rotating sleeve 27 is determined by the connection of the bent portion and the mating portion, such that C The inner side wall of the friction member 19 and the outer surface of the base 3 1 annular flange 300 produce a single-sided friction.
  • the friction surface of the C-shaped friction member 19 may be provided as a smooth surface or other surface in addition to a corrugated surface.
  • the annular friction member 19' in the second embodiment may be integrally formed with the sleeve 27, or the inner circumferential surface 27b of the sleeve 27 may be directly provided with the friction surface and the surface of the annular flange 300 to generate a single-sided friction for driving the sheet. tight.

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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)

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
欧洲专利申请公开号 EP2036688A2 公开了一种利用单手轮进行张紧锯链及 导板压紧的锯链结构， 但在更换锯链时需要反向旋转另一手轮。 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， 一个用于张紧链 锯的张紧組件， 该张紧組件包括使链板纵向移动的轴轮机构， 该轴轮机构设置有 表面具有棱紋的围壁以方便更换锯链时的反向旋转操作， 该轴轮机构的一侧设置 有与链板凸块相啮合的螺旋槽， 以使转动该轴轮机构时螺旋槽推动凸块移动带动 链板向壳体外侧纵向移动从而张紧锯链， 轴轮机构相对螺旋槽的另一侧设置有空 心柱， 该空心柱表面被一环形离合件所围绕， 该环形离合件的外部套设有滑动环， 该滑动环由一环形弹簧单向驱动旋转， 设有键齿的驱动轮与手轮键齿配合用于手 动旋转并使驱动轮驱动环形弹簧带动;'骨动环旋转。 滑动环、 环形离合件、 以及空 心柱三者相互套接， 其中环形离合件的内围面、 外围面分别与空心柱外围面及滑 动环内围面摩擦啮合， 即环形离合件的内、 外表面分別设置成摩擦面与空心柱与 滑动环之间存在两层摩檫界面。 其中环形离合件是由波 钢制成的环形过盈离合 件， 该环形离合件能传动预设的扭矩， 当扭矩达到或超出该预设计值时， 环形离 合件会打滑。 为了保证环形离合件在受力产生弹性变形后仍能与滑动环及空心柱 摩檫啮合传递预设的扭矩， 对环形离合件、 滑动环以及空心柱的加工精度要求非 常高， 因此制造成本会相对较高。
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 有操作省力、 制造成本低的锯链张紧装置。
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： 壳体； 设置于壳体中且用于驱动锯链的链轮； 为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； 锯链张紧装置， 所述 锯链张紧装置包括设置于链板的受力件， 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， 以及设置于转动装置与所述主动件之间 设有摩檫离合装置； 所述摩擦离合装置包括仅由两个摩檫件組成的摩擦副， 所述 摩擦件之间相互套接并且产生切向摩檫力。 所述转动装置与摩擦离合装置之间设置有传动装置。 所述传动装置包括连接 于转动装置的卡接件以及一转套， 所述转套外围设置有斜卡齿， 所述卡接件与斜 卡齿啮合配接单向带动转套转动。
所述摩擦件设置成 C形， 所述 C形摩檫件的外表面设置成摩擦面， 所述 C形 摩檫件开口的两个末端设置成弯折部。 所述锯链张紧装置进一步包括囷定连接 C 形摩擦件的基座，所述基座上设置有环形凸缘，所述 C形摩擦件的弯折部与设置于 环形凸缘的开口配接， 所述基座进一步包括与主动件形状配接的连接件。 所述转 套设置有内圆周面， 所述内圆周面与 C形摩檫件的外表面摩擦啮合。
所述摩擦件设置成环形， 所述环形摩擦件的内表面设置成摩擦面， 所述环形 摩檫件设有配接部， 所述转套设置带有槽口的顶板， 所述环形摩擦件套设于转套 内并且以配接部与槽口啮合固定。所述摩擦离合装置进一步包括一基座，所述基座 上设置有环形凸缘， 所述环形摩擦件的内表面与环形凸缘外表面摩擦啮合， 所述 基座进一步设置有与主动件形状配接的连接件。
所述主动件设置为偏心轮， 所述偏心轮与基座连接件配接， 所述受力件设置 成与偏心轮凸轮面啮合配接的挡头。 所述链锯进一步包括用于安置所述张紧装置 并用于封闭壳体的护罩， 所述护罩上设置具有齿形端面的护罩开口， 所述基座设 置有防松装置， 所述防松装置包括与齿形端面可选择啮合的齿形件以及斜坡面。 所述防松装置由能产生弹性变形的材料制成。 所述转动装置包括夹紧套筒和与该 夹紧套筒相对静止的手轮， 所述手轮上设置有斜坡面，所述斜坡面可选择与防松装 置的斜坡面啮合抵靠， 所述夹紧套筒上套设有弹簧。
本发明的链锯的张紧机构能够有在张紧锯链的同时压紧链板， 操作省力、 稳 定性好、 制造成本相对较低。
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 是本发明中链锯在护罩移掉后的局部主视图。
图 2是本发明中链锯的张紧装置剖视图。
图 3是本发明中链锯的张紧装置第一状态的立体分解示意图。
图 4是本发明中链锯的张紧装置第二状态的立体分解示意图。
图 5是本发明中摩檫力离合装置的俯视方向示意图。
图 6是本发明中链锯的手轮啮合旋转套立体示意图。
图 7是本发明链锯张紧装置的第二种实施方式的立体分解示意图。
具体实施方式 参照图 1 所示， 本发明具体实施方式涉及的链锯 5 包括一个壳体 6， 一个用 于驱动锯链 1 1 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旋转 （图中未示出）， 该动力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 1 1 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 1 1 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 1 1 可被张紧或松弛。
进一步参照图 2、 图 3及图 4 , 为张紧锯链 1 1 并将链板 9 固定在壳体 6上的 一个适合于调节出锯链 1 1 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 靠近链板 9设置且可运动的偏心轮 33， 一个控制及驱动偏心轮 33 运动的转动装 置 15， 以及传动机构 330， 其中传动机构包括摩擦离合装置 10 ; 偏心轮 33 的凸 轮面 33a抵靠着一个固定连接于链板 9 的挡头 91 , 当操作转动装置 15 使所述偏 心轮 33转动时， 该偏心轮 33抵靠所述挡头 9 1 并推动挡头 91 沿所述链板 9纵向 延伸方向朝壳体 6外移动，随即所述挡头 91 带动链板 9沿着链板 9纵向延伸方向 朝离开壳体 6方向移动， 使得链板 9远离链轮 7， 从而张紧所述锯链 1 1。 其中偏 心轮 33可以构造为蜗轮、 齿轮等其它形式， 所述挡头 9 1还可构造为可与蜗轮、 齿轮配合的蜗杆、 齿条等， 只要能使得所述转动装置 15通过传动装置驱使所述链 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。
在本发明最佳实施方式中，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 15 1， 所述夹紧套筒 1 52具有一中心轴线 1 53， 所述摩 檫离合装置 10与偏心轮 33配接于夹紧套筒 152上，偏心轮 33转动轴中心线与夹 紧套筒 152 中心轴线 153 同轴。 夹紧套筒 152 内部具有内螺紋部 152a， 壳体 6上 设置有螺栓 37， 螺栓 37设置外螺紋部 37a， 其一端部固定于壳体 6， 另一端垂直 该壳体 6 向外延伸且穿过设置于链板 9沿链板 9纵向延伸的长形孔 93， 夹紧套筒 152通过其内螺紋部 152a与螺栓 37 外螺紋部 37a啮合配接， 夹紧套筒 1 52相对 链板 9垂直设置。 其中， 夬紧套筒 152在靠近链板 9一端设置压块 35， 该压块 35 位于摩檫离合装置 1 0和链板 9之间用于对偏心轮 33进行限位，并在锯链 1 1 张紧 后对链板 9进行压紧以保持锯链 1 1 的张紧度， 使得在工作过程中， 锯链 1 1 不会 因链锯 5 的震动而松弛， 对用户造成危险。 同时， 夹紧套筒 1 52 上靠近压块 35 的一端上还固定有挡圏 36， 该挡圏 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。 夹紧套筒 152的另一端被相对夹 紧套筒 152静止的手轮 15 1 所包围， 为方便用户操作该夬紧套筒 152 , 夹紧套筒 152 与手轮 151 嵌合配接， 保证手轮 15 1 旋转时带动夹紧套筒 152—起运动。 另 外， 在手轮 151 的内侧设有周向设置的围壁 155， 所述围壁 155 的末端部形成斜 坡面 155 a。
转动装置 15 的夹紧套筒 152穿过护罩 13上与夹紧套筒 152 同轴设置的圆形 的护罩开口 131， 而手轮 151 与该护罩开口 13 1 形状配合， 使得手轮 151 的围壁 155嵌入所述护罩开口 13 1 中， 手轮 15 1 的壳体部突出于护罩 13 的外部， 另外， 该护罩开口 131 的下端部设有沿护罩开口 13 1 周向设置的齿形端面 132。 当正向 旋转转动装置 15 时， 手轮 151 带动夹紧套筒 152相对护罩 13转动， 通过传动机 构 330、 摩檫离合装置 10 及偏心轮 33 能方便地进行张紧锯链的操作。 此处所指 的正向旋转是相对反向旋转而言的， 正向旋转通常指转动装置 15相对链锯壳体 6 的正时针旋转方向， 相反地， 反向旋转通常指转动装置 15相对链锯壳体 6的逆时 针旋转方向； 当然本领域技术人员也可以将上述正、 反向旋转作相反的理解。
如图 3、 图 4所示， 所述摩檫离合装置 10 包括基座 3 1、 旋转套 27、 C 形摩 檫件 19、 压簧 29 ; 其中， 基座 31在靠近所述偏心轮 33—侧设有连接件 3 13， 该 连接件 3 13和基座 3 1构造为一体， 并配合所述偏心轮 33上的通孔连接部 33b连 接所述偏心轮 33，使得连接件 3 13连接所述偏心轮 33后，偏心轮 33 与连接件 313 能够保持相对静止。 基座 3 1在背向所述偏心轮 33 的一侧端面上设置有向旋转手 轮 151 方向延伸的环形凸缘 300， 环形凸缘 300的外表面开设有开口 302， 环形凸 缘 300 内侧设置至少一个连接件 3 1 1， 在本发明最佳实施方式中， 该基座 3 1 共设 有三个连接件 31 1， 且每个连接件 3 11 均构造为一中空螺纹柱。 C形摩擦件 19外 表面设置成摩檫面， C 形摩檫件 19 的开口处相邻的两个末端形成向内的弯折部 19a, C形摩擦件 19套设于基座 3 1 环形凸缘 300 的外表面上， 且 C形摩擦件 19 上两相对的弯折部 19a分別啮合于环形凸缘 3 10表面的开口 302 内， 从而使得 C 形摩檫件 19相对基座 3 1 固定连接； 旋转套 27设置有顶板 17， 旋转套 27 的外圆 周面设置有斜卡齿 273， 旋转套 27 的内圆周面 27b 设置成摩擦面与 C 形摩檫件 19的外表面啮合产生切向摩擦力，这样旋转套 27与 C形摩擦件 19就形成摩檫副。 顶板 17通过螺钉 18穿过设置其上的连接孔 17b与连接件 3 11 配合， 从而将 C形 摩檫件 19收容于旋转套 27 与基座 31 之间。 压簧 29套设于夹紧套筒 152上， 其 一端偏压旋转套 27 的顶板 17， 另一端偏压手轮 15 1， 从而使得摩擦离合装置 10 能克服压簧 29作用力相对夹紧套筒 152沿中心轴线 153产生一定的轴向位移。基 座 31、 顶板 17上均设有与夹紧套筒 152的中心轴线 153 同轴的开孔 17a， 能使夹 紧套筒 152穿过压板 17开孔 17a及基座 31 开孔 310后与螺栓 37相连接。
参照图 5所示， 基座 31 的主体部设有多个沿周向均匀设置的防松装置 312， 本实施例中防松装置 312数量设置有三个，每个防松装置 312上均设置向手轮 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 围壁 155 的 斜坡面 155a抵压配接； 另外， 每个斜坡面 312a的同一侧设有齿形件 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啮合配接，本实施例中 的齿形件 312b数量设有二个，设置于基座 31 的齿形件 312b与围壁 155 由能产生 弹性变形的材料制成的。
如图 3、 图 4所示， 为了正向旋转手轮 151 时为方便地驱动摩擦离合装置 10 对锯链 11 进行张紧并将链板 9压紧于壳体 6， 且在反向旋转手轮 151 松弛所述锯 链 11 时不需克服较强的摩檫力， 将传动机构 330设置成单向传动机构。 手轮 151 内侧通过螺钉 160 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，该卡接件 16设置有卡接部 16a用于与旋转套 27外围斜卡齿 273单向啮合， 为将卡接件 16连接于手轮 151 内侧面，在手轮 151 内侧面设置相应的连接件 162， 卡接件 16通过螺钉 160连接于连接件 162上， 其中连接件 162与卡接件 16之间 设有扭簧 161， 该扭簧 161 可给所述卡接件 16 的卡接部 16a—个朝向手轮 151 中 心的弹性力， 使得在手轮 151 连接所述摩擦离合装置 10时， 该卡接件 16的卡接 部 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与摩擦离合装置 10之间形成单向传动，即卡接件 16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正向旋转 所述转动装置 15 时， 手轮 151 带动该卡接件 16旋转， 卡接件 16 带动所述旋转套 27旋转。利用 C形摩檫件 19波紋状外壁与旋转套 27 内圆周面 27b之间的摩檫作 用力， 旋转套 27带动 C形摩檫件 19旋转， 由于 C形摩檫件 19相对基座 31 固定 设置， 因此 C形摩擦件 19 带动基座 31 旋转， 从而使得配接于基座 31 连接件 313 的偏心轮 33 旋转， 偏心轮 33抵靠所述挡头 91使挡头 91 带动链板 9 沿着链板 9 纵向延伸方向朝离开壳体 6方向移动， 链板 9远离链轮 7从而张紧锯链 11。 更换 锯链 11 时， 反向旋转转动装置 15, 使卡接件 16的卡接部 16a在该斜卡齿 273上 进行爬行， 此时旋转套 27保持静止而手轮 151 带动夹紧套筒 152继续反向旋转， 当夹紧套筒 152松开并脱离与设置于壳体 6 的螺栓 37 的啮合， 此时可将护罩 13 连同张紧装置一起从链锯 5上拆卸。
本实施例中的传动机构 330除了采用单爪棘轮机构构造的单向传动装置外， 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。
通过采用上述结构，本发明链锯 5的锯链 1 1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 1 1 时，首先将连接有转动装置 15 的护罩 13 扣在 所述壳体 6上的相应位置， 使夹紧套筒 152 与设置于壳体 6并穿过链板 9长形孔 93 的螺栓 37 相对接， 再正向转动手轮 15 1， 使手轮 15 1 带动所述夹紧套筒 152 螺紋配合在所述螺栓 37 上并相对链板 9 进行轴向移动， 与此同时， 该手轮 15 1 通过其上连接的卡接件 16卡接部 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通过与 C形摩檫件 19之间的摩擦带动 C形 摩檫件 19 与基座 3 1 同步转动， 基座 3 1 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 1 1 开始张紧。 此时， 锯链 1 1 的张紧力小于在工厂预先 设置的摩擦离合装置 10产生的摩擦力。 继续转动手轮 15 1， 当锯链 1 1 张紧达到 了在工厂预先设置的最优张紧力后， 锯链 1 1 张紧完成。 此时， 锯链 1 1 的张紧力 对链板 9的反作用力形成一束缚力，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。 在锯链 1 1 完成张紧后， 该反作用力大小超过了上 述的摩擦离合力， 继续旋转手轮 15 1， 摩擦离合器 10 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， 转套 27 内圆周面 27b 与 C 形摩 檫件 19 外壁之间打滑， 从而使得基座 3 1 停止转动， 偏心轮 33 保持静止， 锯链 11 张紧度保持不变。 手轮 15 1 继续旋转并带动夹紧套筒 152 以及连接于夹紧套筒 152的压块 35继续向链板 9方向移动从而压紧链板 9。 在压紧力的作用下， 防松 装置 3 12上的斜坡面 3 12a与手轮 15 1 内侧围壁 155 的斜坡面 155 a相互啮合且相 互挤压， 致使防松装置 312径向向外产生弹性变形， 而齿形件 312b在径向方向上 正好与设置于护罩开口 131 的齿形端面 132相啮合， 从而形成又一棘轮装置， 即 当手轮 15 1 旋转至张紧链板 11 且压紧链板 11 的状态时，摩檫离合装置 10与护罩 13便自动地锁紧在一起， 从而保证了链板 9在工作过程中不会松脱。
需要指出的是， 上述锯链张紧装置在张紧过程中， 操作者是进行盲装的， 即 操作者只需将转动装置 15 的夹紧套筒 152螺紋连接于螺栓 37上， 而无需将偏心 轮 33 的凸轮面 33a与挡头 91进行对准。因为在安装过程中挡头 91 即使没有与偏 心轮 33 的凸轮面 33a接触到位， 可能只是与偏心轮 33 的端面相接触， 但当夹紧 套筒 152螺紋连接于螺栓 37时， 压簧 29能向手轮 15 1 方向产生弹性压缩， 只要 手轮 151 带动夹紧套筒 152相对螺栓 37旋转，偏心轮 33便随之产生相应的转动， 当偏心轮 33的凸轮面 33a转动至与挡头 91相啮合的位置时，在压簧 29作用力下， 摩檫离合装置 10于夹紧套筒 152沿中心轴线 153产生一个远离手轮 15 1 方向的位 移， 此时偏心轮 33 凸轮面 33a与挡头 91 能自动啮合到位。 采用这种安装方式， 省去了锯链 1 1 张紧时需要对准的工作步骤， 大大地提高了工作效率。
而当需要更锯链时， 反向旋转转动装置 15 带动夹紧套筒 152于螺栓 37上产 生相对压紧方向的位移， 使得手轮 151 内侧围壁 155 的斜坡 155 a与防松装置 3 12 上的斜坡面 3 12a脱开啮合， 防松装置 3 12恢复弹性变形， 此时防松装置 312上的 齿形件 3 12b 自动脱开与护罩开口 13 1 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 15 1， 直至夹紧套筒 152脱离设置于壳体 6 的 螺栓 37， 此时护罩 13连同张紧装置可从链锯 5上一起脱卸。
摩擦离合装置 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， 由于 C形摩擦件 19相对基座 31 的环形凸缘 300 固定连接，使得摩擦离合装置 10 通过 C形摩檫件 19 与旋转套 27单面产生摩檫离合力从而实现锯链 1 1 的张紧， 这种利用 C 形摩擦件 19 单面产生摩檫离合力的摩擦件结构加工精度要求低， 方 便加工及制造， 由此产生的制造成本也大大降低。 摩擦离合装置 10所需的摩檫离 合力对应于锯链 1 1所需最佳锯链张力已预先在工厂制造时就调整好，与使用者的 个人感觉无关， 因此， 摩擦离合装置 10可确保了锯链 1 1 在操作完锯链张紧后总 是具有相同的锯链张紧力。
参照图 7所示， 是本发明的第二种实施方式， 为了表述方便， 与第一实施例 相同的结构采用相同的编号表示， 此处不作贅述。 本实施例中， 环形摩擦件 19 ' 所取代了 C形摩檫件 19， 转套 27 的顶板 17上开设有槽口 17c， 环形摩擦件 19 ' 的外围壁设置有与槽口 17c啮合的配接部 19b , 通过槽口 17c与配接部 19b 的啮 合使得环形摩檫件 19 '相对转套 27 固定连接。 环形摩擦件 19 '套设于基座 31 环形 凸缘 300上， 使得摩檫离合装置 10 '的环形摩檫件 19 '的内表面与环形凸缘 300外 表面之间产生切向摩檫力， 即环形摩檫件 19 '与基座环形凸缘 300形成一摩檫副， 其中的环形摩檫件 19'可由波紋钢制成， 也可用塑料件或其它材料制成， 环形摩 檫件 19 '内表面设置成波紋状有利于设计与环形凸缘 300 之间的摩檫力。 当然， 摩檫离合装置 10 '的最佳摩擦力是根据锯链张紧所需的张紧力预先设计定的。
当然，本领域技术人员还可以设想将本发明中的摩擦离合装置 10的结构作一 些改变， 例如可以第一实施例中的 C 形摩擦件 19 向内延伸的弯折部 19a设置成 向外延伸的弯折部， 在旋转套 27上设置有相应的配接部， 通过弯折部与配接部的 连接从而将 C形摩擦件 19 与旋转套 27 的位置进行囷定， 这样 C形摩檫件 19 内 侧壁与基座 3 1 环形凸缘 300外表面产生单面摩檫。 C形摩檫件 19的摩檫面除了 设置成波紋状凹凸面以外， 还可以设置成光滑面或其它形式有表面。 将第二实施 例中的环形摩擦件 19 '可以与转套 27 —体成形， 或者直接将转套 27 的内圆周面 27b设置摩檫面与环形凸缘 300表面产生单面摩擦用于传动张紧。

Claims

权 利 要 求 书
1 . 一种链锯， 包括：
壳体；
设置于壳体中且用于驱动锯链的链轮；
为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；
锯链张紧装置， 所述锯链张紧装置包括设置于链板的受力件， 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， 以及设置于转 动装置与所述主动件之间设有摩擦离合装置；
其特征在于： 所述摩檫离合装置包括仅由两个摩擦件組成的摩擦副， 所述摩檫 件之间相互套接并且产生切向摩擦力。
2. 根据权利要求 1 所述的链锯， 其特征在于： 所述转动装置与摩擦离合装置之 间设置有传动装置。
3 . 根据权利要求 2所述的链锯， 其特征在于： 所述传动装置包括连接于转动装 置的卡接件以及一转套， 所述转套外围设置有斜卡齿， 所述卡接件与斜卡齿啮 合配接单向带动转套转动。
4. 根据权利要求 3所述的链锯， 其特征在于： 所述摩擦件设置成 C形， 所述 C 形摩檫件的外表面设置成摩檫面， 所述 C形摩檫件开口的两个末端设置成弯折 部。
5 . 根据权利要求 4所述的链锯， 其特征在于： 所述锯链张紧装置进一步包括固 定连接 C形摩檫件的基座，所述基座上设置有环形凸缘， 所述 C形摩檫件的弯 折部与设置于环形凸缘的开口配接， 所述基座进一步包括与主动件形状配接的 连接件。
6. 根据权利要求 5所述的链锯， 其特征在于： 所述转套设置有内圓周面， 所述 内圆周面与 C形摩擦件的外表面摩擦啮合。
7. 根据权利要求 3所述的链锯， 其特征在于： 所述摩擦件设置成环形， 所述环 形摩檫件的内表面设置成摩擦面， 所述环形摩擦件设有配接部， 所述转套设置 带有槽口的顶板，所述环形摩檫件套设于转套内并且以配接部与槽口啮合囷定。
8. 根据权利要求 7所述的链锯， 其特征在于： 所述摩檫离合装置进一步包括一 基座，所述基座上设置有环形凸缘， 所述环形摩擦件的内表面与环形凸缘外表面 摩檫啮合， 所述基座进一步设置有与主动件形状配接的连接件。
9. 根据权利要求 5 或 8所述的链锯， 其特征在于： 所述主动件设置为偏心轮， 所述偏心轮与基座连接件配接， 所述受力件设置成与偏心轮凸轮面啮合配接的 挡头。
10. 根据权利要求 5或 8所述的链锯， 其特征在于： 所述链锯进一步包括用于 安置所述张紧装置并用于封闭壳体的护罩， 所述护罩上设置具有齿形端面的护 罩开口， 所述基座设置有防松装置， 所述防松装置包括与齿形端面可选择啮合 的齿形件以及斜坡面， 所述防松装置由能产生弹性变形的材料制成， 所述转动 装置包括夹紧套筒和与该夹紧套筒相对静止的手轮， 所述手轮上设置有斜坡面， 所述斜坡面可选择与防松装置的斜坡面啮合抵靠，所述夹紧套筒上套设有弹簧。
11 . 一种链锯， 包括：
壳体；
设置于壳体中且用于驱动锯链的链轮；
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 向移动；
以及锯链张紧装置， 所述锯链张紧装置包括设置于链板的受力件， 驱动所述受 力件带动链板纵向移动的主动件， 驱动所述主动件的转动装置， 以及设置于转 动装置与主动件之间设有传动装置；
其特征在于： 所述传动装置包括设置于转动装置的卡接件， 与卡接件单向啮合 传动的转动件，以及包括相互套接的第一摩擦件和第二摩擦件的摩檫离合装置。
12. 根据权利要求 1 1 所述的链锯， 其特征在于： 所述主动件设置为偏心轮， 所 述受力件设置成与偏心轮凸轮面啮合配接的挡头。
13 . 根据权利要求 1 1 所述的链锯， 其特征在于： 所述转动装置包括一个夹紧套 筒和一个与该夹紧套筒相对静止的手轮， 所述手轮上设置有抵靠部。
14. 根据权利要求 1 1 所述的链锯， 其特征在于： 所述传动装置进一步包括基座， 所述基座设置有连接偏心轮的连接件、 防松装置以及环形凸缘。
15 . 根据权利要求 1 1 所述的链锯， 其特征在于： 所述链锯进一步包括用于安置 所述张紧装置并用于封闭壳体的护罩， 所述护罩上设置具有齿形端面的护罩开 口， 所述防松装置包括与齿形端面可选择啮合的齿形件以及与手柄抵靠部配接 的斜坡面。
16. 根据权利要求 15所述的链锯， 其特征在于： 所述防松装置由能产生弹性变 形的材料制成。
17. 根据权利要求 15所述的链锯， 其特征在于： 所述转动件设置成转套， 所述 转套的外围设置有与卡接件啮合的斜卡齿。
18 . 根据权利要求 17所述的链锯， 其特征在于： 所述第一、 第二摩擦件中至少 一个摩檫件设置有内、 外表面， 其中仅有一个表面设置成摩檫面与另一摩檫件 产生摩檫。
19. 根据权利要求 18所述的链锯， 其特征在于： 所述转套的内圆周面设置成摩 擦面， 所述具有内、 外表面的摩擦件固定套接于基座的环形凸缘上， 所述具有 内、 外表面的摩檫件的外表面设置成摩檫面与转套内圆周面周向啮合。
20. 根据权利要求 17所述的链锯， 其特征在于： 所述具有内、 外表面的摩檫件 固定套接于转套内， 环形摩擦件的内表面设置成摩擦面与环形凸缘的外表面周 向啮合。
21 . 一种链锯， 包括：
壳体；
设置于壳体中且用于驱动锯链的链轮；
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 壳体纵向移动；
用于覆盖链轮及至少部分链板的护罩；
部分收容于护罩的锯链张紧装置，所述锯链张紧装置包括设置于链板的受力件， 驱动所述受力件带动链板纵向移动的主动件， 驱动所述主动件的转动装置， 设 置于转动装置与主动件之间的传动机构；
其特征在于： 所述护罩上设第一啮合部， 所述转动装置设有抵靠部， 所述传动 机构设置有防松装置和摩檫离合装置， 所述防松装置包括与抵靠部可选择啮合 的作用部及与第一啮合部可选择配接锁定的第二啮合部， 所述摩檫离合装置包 括相互套接的第一摩檫件和第二摩檫件， 所述第一、 第二摩檫件之间产生切向 摩檫力。
22. 根据权利要求 21 所述的链锯， 其特征在于： 所述防松装置由能产生弹性变 形的材料制成。
23 . 根据权利要求 22所述的链锯， 其特征在于： 所述转动装置包括手轮和与手 轮相对静止的夹紧套筒， 所述夹紧套筒具有一中心轴线， 所述第一、 第二摩擦 件与主动件配接于所述夹紧套筒上且与夹紧套筒中心轴线同轴设置。
24. 根据权利要求 23所述的链锯， 其特征在于： 所述手轮的内侧具有周向设置 的围壁， 所述抵靠部为设置于围壁末端的斜坡面。
25 . 根据权利要求 24所述的链锯， 其特征在于： 所述护罩上设置有圆形开口， 所述手轮与圆形开口形状配合， 所述第一啮合部为沿圆形开口周向设置的齿形 端面
26 . 根据权利要求 25所述的链锯， 其特征在于： 所述壳体上设置有螺栓， 所述 夹紧套筒内部具有内螺 部， 所述螺栓与夹紧套筒螺 丈连接。
27 . 根据权利要求 26所述的链锯， 其特征在于： 所述传动装置包括连接于手轮 内侧的卡接件， 以及一转套， 所述转套外围设置有斜卡齿， 所卡接件与斜卡齿 啮合配接单向带动转套同步转动。
28 . 根据权利要求 27所述的链锯， 其特征在于： 所述转套设置为第一摩擦件， 所述转套的内圓周面设置成摩擦面， 所述传动装置包括一基座， 所述基座上固 定设置有向第一摩擦件延伸的环形凸缘， 所述第二摩擦件为囷定设置于环形凸 缘的环形摩擦件， 所述转套内圓周面与环形摩擦件外表面周向啮合。
29 . 根据权利要求 27所述的链锯， 其特征在于： 所述第一摩擦件为固定设置于 转套内侧的环形件， 所述传动装置包括一基座， 所述第二摩檫件为固定设置于 基座的环形凸缘， 所述环形件的内表面与环形凸缘的外表面摩檫啮合。
30 . 根据权利要求 28或 29所述的链锯， 其特征在于： 所述防松装置设置于所 述基座上， 所述作用部为向手轮方向凸出的斜坡面， 所述第二啮合部为齿形件。
PCT/CN2011/080139 2010-09-29 2011-09-24 链锯 Ceased WO2012041192A1 (zh)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN 201010512490 CN102430810B (zh) 2010-09-29 2010-09-29 具有锯链张紧装置的链锯
CN 201010506979 CN102430809B (zh) 2010-09-29 2010-09-29 链锯
CN201010506979.1 2010-09-29
CN 201010512501 CN102430811B (zh) 2010-09-29 2010-09-29 手持式链锯
CN201010512490.5 2010-09-29
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