CN112372749A

CN112372749A - Chain saw

Info

Publication number: CN112372749A
Application number: CN202011362158.5A
Authority: CN
Inventors: 朱惠斌; 董中兴
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-02-19

Abstract

A chain saw includes a main body, a chain, and a guide plate guiding the chain, the main body includes a sprocket driving the chain to rotate and cut along an edge of the guide plate, the guide plate extends out of the main machine body and moves back and forth relative to the main machine body in a non-fixed state, the chain saw further includes a locking device for fixing the guide plate to the main body and tensioning the chain, the locking device comprises a cover plate and a pressing component, the pressing component rotates along the axis of the pressing component, and moves in a direction perpendicular to the guide plate to press the guide plate against the main body, the locking device further comprising a tensioning assembly providing a forward pushing force to the guide plate to tension the chain, the pressing assembly drives the tensioning assembly to move forwards linearly when the pressing assembly presses the guide plate in a rotating mode, and the chain saw can achieve fastening of the guide plate and tensioning of the chain through one action.

Description

Chain saw

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of electric tools, in particular to a chain saw for cutting trees and the like.

[ background of the invention ]

The electric saw is a tool for cutting by driving a chain to rotate at a high speed along a guide plate through a chain wheel, the chain saw needs to fix the guide plate on a main machine body before being used, the chain can be used only by tensioning the chain through the guide plate, the chain can be loosened due to swinging or heating after being used for a period of time, the chain can fall off from the guide plate seriously, if the chain is not timely and is easy to damage the safety of a user by re-tensioning the chain, the conventional chain loosening adjustment mode is relatively troublesome, one mode needs to use the thread matching of a special tool adjusting screw rod and a nut, the mode needs to use a special tool, the application range of the limitation is relatively narrow, the other mode is that the tensioning of the chain and the fastening of the guide plate are respectively adjusted through two mechanisms, and the adjustment mode fastening device has excessive parts and is complex to operate.

Accordingly, there is a need for an improved chain saw that overcomes the deficiencies of the prior art.

[ summary of the invention ]

In view of the defects of the prior art, the invention aims to provide an electric chain saw which is simple in structure and convenient to operate.

The technical scheme adopted by the invention for solving the problems in the prior art is as follows: a chain saw comprises a main machine body, a chain and a guide plate for guiding the chain, wherein the main machine body comprises a chain wheel for driving the chain to rotate and cut along the edge of the guide plate, the guide plate extends out of the main machine body and moves back and forth relative to the main machine body in a non-fixed state, the chain saw further comprises a locking device for fixing the guide plate on the main machine body and tensioning the chain, the locking device comprises a cover plate and a pressing assembly, the pressing assembly rotates along the axis of the pressing assembly and moves in a direction perpendicular to the guide plate to press the guide plate on the main machine body, the locking device further comprises a tensioning assembly for providing forward thrust for the guide plate to tension the chain, and the pressing assembly drives the tensioning assembly to move forwards and linearly when the pressing assembly rotates to press the guide plate.

Preferably, the pressing assembly comprises a pressing plate arranged between the cover plate and the guide plate and a locking shaft penetrating through a through hole formed in the cover plate, one end, extending out of the outer surface of the cover plate, of the locking shaft is fixedly connected with an operation knob, the other end of the locking shaft is of a hollow cylindrical structure, internal threads are formed in the cylindrical structure, and a bolt matched with the internal threads is arranged on the main machine body.

As preferred, the tensioning subassembly set up in the apron to the host computer body direction extends the intracavity that holds that forms, the tensioning subassembly includes drive gear, driving rack, chain tensioning plate and cover and locates the locking off-axial just follows the drive gear of the coaxial rotation of locking axle, drive gear's outer peripheral face is equipped with along the screw thread of radial extension, the screw thread with the drive gear cooperation drives drive gear is rotatory, drive gear is rotatory to be driven driving rack is in hold intracavity front and back linear movement, driving rack with be provided with the connecting piece between the chain tensioning plate, drive when driving rack front and back linear movement drive chain tensioning plate front and back linear movement.

Preferably, the connecting member includes an elastic member, one end of the elastic member is connected to a first boss provided at a front portion of the driving rack, and the other end of the elastic member is connected to a second boss provided at the chain tensioner plate.

Preferably, one surface of the transmission rack facing the cover plate is provided with a guide groove, and the cover plate is provided with a guide convex strip matched with the guide groove along the front-back direction.

Preferably, gear supporting shafts are arranged at two ends of the transmission gear, a gear supporting groove is formed in one surface, facing the cover plate, of the chain tensioning plate, and the gear supporting groove supports the gear supporting shafts to abut against a groove formed in the accommodating cavity.

Preferably, the chain tensioning face to one side of the host computer body is provided with the tensioning piece, the tensioning piece supports and leans on the baffle is close to the one end of sprocket, the clamp plate is equipped with the confession the tensioning piece passes and restricts the bar groove of tensioning piece back-and-forth movement.

Preferably, the locking shaft stretches into the periphery of one end of the transmission turbine is provided with a clamping groove, the clamping groove is embedded with a limit, the locking shaft is separated from the elastic retainer ring of the transmission turbine, and an annular gasket is further arranged between the elastic retainer ring and the transmission turbine.

Preferably, a guide plate fixing plate is arranged on one side, facing the guide plate, of the main machine body, a convex portion is arranged on the guide plate fixing plate, the convex portion penetrates through a travel groove formed in the guide plate, the travel groove limits the guide plate to move back and forth along the convex portion, and the bolt penetrates through the guide plate fixing plate and extends towards the guide plate.

Preferably, an elastic member is disposed between the operation knob and an outer surface of the cover plate.

Compared with the prior art, the invention has the following beneficial effects: compress tightly the subassembly rotation and remove and then compress tightly the baffle on the host computer body through apron and clamp plate to the host computer body, it drives tensioning assembly linear movement forward to compress tightly the subassembly in the rotation when compressing tightly the baffle, thereby, tensioning assembly provides the forward thrust of baffle, the baffle moves forward and then can the tensioning chain, the chain relaxes on the way of using, the unscrewing compresses tightly the subassembly back and screws again, tensioning assembly promotes the baffle and moves tensioning chain again forward, need not to dismantle locking device, avoid spare part to lose, fastening baffle and tensioning chain are accomplished through the action that the subassembly was compressed tightly to screwing, simple structure is convenient in operation.

[ description of the drawings ]

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings:

FIG. 1 is a cross-sectional view of a chainsaw locking arrangement of the present invention;

FIG. 2 is an exploded schematic view of a locking arrangement of the chain saw of FIG. 1;

FIG. 3 is a schematic view of the chain saw of FIG. 2 from another perspective with the locking mechanism exploded;

FIG. 4 is an exploded view of the main body of the chain saw of FIG. 3 and the locking mechanism.

The meaning of the reference symbols in the figures:

100. the main body 11, the bolt 12, the guide plate fixing plate 121, the protrusion 21, the operation knob 22, the locking shaft 221, the locking groove 23, the elastic member 24, the pressing plate 241, the screw 242, the strip-shaped groove 25, the elastic member 31, the chain tensioning plate 311, the second boss 312, the gear supporting groove 313, the tensioning piece 32, the transmission gear 321, the gear supporting shaft 33, the transmission rack 331, the first boss 332, the guide groove 34, the transmission turbine 4, the cover plate 41, the guide convex strip 42, the groove 43, the through hole 51, the elastic retainer ring 52, the annular gasket 6, the guide plate 61, the stroke groove 7, the chain 7, and the like

[ detailed description ] embodiments

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1 to 4, which show a chain saw according to an embodiment of the present invention, referring to fig. 4, the chain saw comprises a main machine body 100, a chain 7 and a guide plate 6 guiding the chain 7, wherein the main machine body 100 comprises a chain wheel driving the chain 7 to rotate and cut along the edge of the guide plate 6, the guide plate 6 extends forwards out of the main machine body 100, and can move back and forth relative to the main body 100 in a non-fixed state, the guide 6 is fixed on a guide fixing plate 12 provided at one side of the main body 100, the side of the guide plate fixing plate 12 facing the guide plate 6 is provided with a convex part 121, the guide plate 6 is correspondingly provided with a stroke groove 61, the protrusion 121 passes through the stroke groove 61 and restricts the guide plate 6 from moving back and forth along the protrusion 121, whereby the guide plate 6 can be moved forward to tension the chain 7 or backward to slacken the chain 7.

As shown in fig. 1, the chain saw further includes a locking device for fixing the guide plate 6 on the main body 100 and tensioning the chain 7, the locking device includes a cover plate 4 and a pressing assembly, the pressing assembly rotates along its axis and moves in a direction perpendicular to the guide plate 6 to press the guide plate 6 against the main body 100, the pressing assembly includes a pressing plate 24 disposed between the cover plate 4 and the guide plate 6 and a locking shaft 22 passing through a through hole 43 formed in the cover plate 4, one end of the locking shaft 22 extending out of the outer surface of the cover plate 4 is fixedly connected with an operation knob 21, the other end is provided with a hollow cylindrical structure in which an internal thread is formed, a bolt 11 matched with the internal thread is disposed on the main body 100, and the bolt 11 passes through the guide plate fixing plate 12 and extends toward the guide plate 6, in the present embodiment, the operation knob 21 and the cylindrical structure are integrally formed, when the user operates and screws the operation knob 21, the internal thread of the cylindrical structure is engaged with the bolt 11, the pressing assembly moves in the direction of the main body 100, and the guide plate 6 is pressed and fixed on the guide plate fixing plate 12 of the main body 100 by the cover plate 4 and the pressing plate 24.

The locking device further comprises a tensioning assembly for providing a forward pushing force for the guide plate 6 to tension the chain 7, the tensioning assembly is disposed in a containing cavity formed by extending the cover plate 4 to the main body 100, the pressing plate 24 is fixedly connected with the cover plate 4 through a screw 241, and the tensioning assembly is limited in the containing cavity, the pressing assembly rotates to press the guide plate 6 to drive the tensioning assembly to linearly move forward in the containing cavity to provide a pushing force for the guide plate 6, the guide plate 6 moves forward to tension the chain 7, the chain 7 is loosened during use, the pressing assembly is loosened to be retightened, the tensioning assembly pushes the guide plate 6 to move forward to retighten the chain 7, thereby fastening the guide plate 6 and tensioning the chain 7, and the tightening is completed by one action of the pressing assembly, the operation is simple, the locking device does not need to be disassembled, and the loss of parts is avoided.

Referring to fig. 2 and 3, the tensioning assembly includes a transmission gear 32, a transmission rack 33, a chain tensioning plate 31, and a transmission worm gear 34 sleeved outside the locking shaft 22 and coaxially rotating along with the locking shaft 22, wherein an outer ring diameter of the transmission worm gear 34 is larger than a diameter of the through hole 43, so as to prevent the transmission worm gear 34 from being disengaged from the cover plate 4, in this embodiment, the locking shaft 22 is a flat shaft, a cross section of an inner ring of the transmission worm gear 34 is the same as that of the locking shaft 22, an inner surface of the transmission worm gear 34 is attached to an outer surface of the locking shaft 22, and in other embodiments, the transmission worm gear 34 may also coaxially rotate with the locking shaft 22 by other methods such as a snap; the outer circumferential surface of the transmission worm wheel 34 is provided with a thread extending along the radial direction, the thread is matched with the transmission gear 32 to drive the transmission gear 32 to rotate, two ends of the transmission gear 32 are provided with gear support shafts 321 for supporting the transmission gear 32, one surface of the chain tensioning plate 31 facing the cover plate 4 is provided with gear support grooves 312, the gear support grooves are arranged in a long strip shape, the gear support grooves 312 support the gear support shafts 321 to abut against the grooves 42 formed in the accommodating cavity, the transmission gear 32 is simultaneously meshed with the transmission rack 33, one surface of the transmission rack 33 facing the cover plate 4 is provided with guide grooves 332, the cover plate 4 is provided with guide convex strips 41 matched with the guide grooves 332, the guide grooves 332 limit the transmission rack 33 to move back and forth along the guide convex strips 41, of course, a person skilled in the art can also arrange the guide grooves 332 on the cover plate 4, the guiding protruding strip 41 is arranged on the transmission rack 33, so as to be arranged, the guiding groove 332 and the guiding protruding strip 41 cooperate to limit the transmission rack 33 to move back and forth in the accommodating cavity, the transmission gear 32 rotates to drive the transmission rack 33 to move linearly back and forth in the accommodating cavity, a connecting member is arranged between the transmission rack 33 and the chain tensioning plate 31, the transmission rack 33 drives the chain tensioning plate 31 to move linearly back and forth while moving linearly back and forth, a tensioning piece 313 is arranged on one side of the chain tensioning plate 31 facing the main machine body 100, the tensioning piece 313 abuts against one end of the guide plate 6 close to the chain wheel, the pressing plate 24 is provided with a strip-shaped groove 242 for the tensioning piece 313 to pass through and limit the back and forth movement of the tensioning piece 313, the connecting member comprises an elastic member 25, one end of the elastic member 25 is connected to a first boss 331 arranged in front of the transmission rack 33, the other end connect in the second boss 311 that sets up on the chain tensioning plate 31, first boss 331 with the second boss 311 sets up relatively, further sets up drive rack 33 includes two racks of parallel arrangement, and the front portion of two racks is provided with first boss 331 respectively, and is corresponding elastic component 25 and second boss 311 set up to two equally, in this embodiment elastic component 25 sets up to the extension spring, sets up from this between drive gear 32 and the drive rack 33, drive rack 33 with the conduction of power is more stable between the chain tensioning plate 31, and sets up the connecting piece as elastic component and can there is certain manufacturing and assembly error in the locking device manufacturing and the in-process of assembly.

Further, a clamping groove 221 is formed in the periphery of one end, extending into the transmission turbine 34, of the locking shaft 22, an elastic retainer ring 51 for limiting the locking shaft 22 to be separated from the transmission turbine 34 is embedded in the clamping groove 221, an annular gasket 52 is further arranged between the elastic retainer ring 51 and the transmission turbine 34, the annular gasket 52 is sleeved on the periphery of the locking shaft 22, and the locking shaft 22 is axially positioned with the transmission turbine 34 through the elastic retainer ring 51 and the annular gasket 52; an elastic member 23 is disposed between the operation knob 21 and the outer surface of the cover plate 4, the elastic member 23 is sleeved on the periphery of the locking shaft 22 and supported between the outer surface of the cover plate 4 and the operation knob 21, and the elastic member 23 is a spring in the present embodiment.

Referring to fig. 1, when the locking shaft 22 is screwed by the operation knob 21, the driving worm wheel 34 is driven to rotate coaxially, the transmission worm wheel 34 drives the transmission gear 32 to rotate along the counterclockwise direction through the thread arranged on the periphery, meanwhile, the transmission gear 32 drives the transmission rack 33 to move linearly forward, the extension of the tension spring connecting the transmission rack 33 and the chain tensioning plate 31 increases to provide tension for the chain tensioning plate 31, at this time, the guide plate 6 is not pressed on the guide plate fixing plate 12 and can move forward along the convex part 121, the tension piece 313 of the chain tension plate 31 moves forward in the strip groove 242 while pushing the guide plate 6 to move forward, when the guide plate 6 is fully pressed against the guide plate fixing plate 12, the chain tensioning plate 31 provides sufficient tension to the guide plate 6 to tension the chain 7; when chain 7 is relaxed, through operation knob 21 unscrews locking shaft 22, baffle 6 is loosened simultaneously and can be followed convex part 121 back-and-forth movement, locking shaft 22 drives transmission turbine 34 coaxial rotation, transmission turbine 34 drives transmission gear 32 is along clockwise rotation, simultaneously transmission gear 32 drives transmission rack 33 moves backward, the extension of extension spring reduces, and then passes through operation knob 21 screws again locking shaft 22 repeats above-mentioned process, tensioning piece 313 promotes baffle 6 moves forward and tightens again chain 7, and of course technical field person also can do opposite understanding with above-mentioned direction of rotation.

The present invention is not limited to the above-described embodiments. One of ordinary skill in the art will readily appreciate that there are numerous alternatives to the chainsaw of the present invention without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.

Claims

1. A chain saw comprising a main body, a chain, and a guide plate for guiding the chain, wherein the main body includes a sprocket for driving the chain to rotate and cut along an edge of the guide plate, the guide plate extends out of the main body and moves back and forth relative to the main body in a non-fixed state, the chain saw further comprises a locking device for fixing the guide plate to the main body and tensioning the chain, the locking device includes a cover plate and a pressing assembly, the pressing assembly rotates along its axis and moves in a direction perpendicular to the guide plate to press the guide plate against the main body, the chain saw comprising: the locking device further comprises a tensioning assembly for providing forward pushing force for the guide plate to tension the chain, and the pressing assembly drives the tensioning assembly to move forwards linearly when the pressing assembly rotates to press the guide plate.

2. The chain saw as recited in claim 1, wherein: the pressing assembly comprises a pressing plate arranged between the cover plate and the guide plate and a locking shaft penetrating through a through hole formed in the cover plate, the locking shaft extends out of one end of the outer surface of the cover plate and is fixedly connected with an operation knob, the other end of the locking shaft is of a hollow cylindrical structure, internal threads are formed in the cylindrical structure, and a bolt matched with the internal threads is arranged on the main machine body.

3. The chain saw as recited in claim 2, wherein: the tensioning subassembly set up in the apron to the host computer body direction extends the intracavity that holds that forms, the tensioning subassembly includes that drive gear, driving rack, chain tensioning board and cover are located locking off-axial and following locking off-axial coaxial rotatory drive turbine, drive turbine's outer peripheral face is equipped with along the screw thread of radial extension, the screw thread with the drive gear cooperation drives drive gear is rotatory, drive gear is rotatory to be driven driving rack is in hold intracavity front and back linear movement, driving rack with be provided with the connecting piece between the chain tensioning board, drive when driving rack front and back linear movement drive chain tensioning board front and back linear movement.

4. The chain saw as recited in claim 3, wherein: the connecting piece comprises an elastic component, one end of the elastic component is connected with a first boss arranged at the front part of the transmission rack, and the other end of the elastic component is connected with a second boss arranged on the chain tensioning plate.

5. The chain saw as recited in claim 3, wherein: the transmission rack faces one side of the cover plate and is provided with a guide groove, and the cover plate is provided with guide convex strips matched with the guide groove along the front-back direction.

6. The chain saw as recited in claim 3, wherein: gear supporting shafts are arranged at two ends of the transmission gear, a gear supporting groove is formed in one surface, facing the cover plate, of the chain tensioning plate, and the gear supporting groove supports the gear supporting shafts to abut against a groove formed in the accommodating cavity.

7. The chain saw as recited in claim 3, wherein: chain tensioning face to one side of the host computer body is provided with the tensioning piece, the tensioning piece supports and leans on the baffle is close to the one end of sprocket, the clamp plate is equipped with the confession the tensioning piece passes and restricts the bar groove of tensioning piece back-and-forth movement.

8. The chain saw as recited in claim 3, wherein: the locking axle stretches into transmission turbine's one end periphery is provided with the draw-in groove, the draw-in groove is embedded to have the restriction the locking axle is deviate from transmission turbine's circlip, circlip with still be provided with the annular gasket between the transmission turbine.

9. The chain saw as recited in any one of claims 2-8, wherein: the main machine body is provided with a guide plate fixing plate on one side facing the guide plate, a convex part is arranged on the guide plate fixing plate and penetrates through a stroke groove formed in the guide plate, the stroke groove limits the guide plate to move back and forth along the convex part, and the bolt penetrates through the guide plate fixing plate and extends towards the guide plate.

10. The chain saw as recited in any one of claims 2-8, wherein: an elastic piece is arranged between the operation knob and the outer surface of the cover plate.