CN102172927A - Brake structure of electric chain saw - Google Patents
Brake structure of electric chain saw Download PDFInfo
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- CN102172927A CN102172927A CN2011100039116A CN201110003911A CN102172927A CN 102172927 A CN102172927 A CN 102172927A CN 2011100039116 A CN2011100039116 A CN 2011100039116A CN 201110003911 A CN201110003911 A CN 201110003911A CN 102172927 A CN102172927 A CN 102172927A
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- casing
- electric chain
- multidiameter
- shaft
- chain saw
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Abstract
The invention discloses a brake structure of an electric chain saw. The brake structure comprises a shell; a drive motor is arranged in the shell; the end of a rotating shaft of the drive motor is provided with a pinion; a gearwheel engaged with the pinion is arranged in the shell, the gearwheel is switched over and positioned through a step shaft, and the gearwheel is provided with a hub shaft sleeved on the step shaft; one end of the step shaft is provided with a shaft shoulder with the same diameter as the hub shaft and propped on the end face of the hub shaft; torsion springs for linking the step shaft and the hub shaft are arranged on the hub shaft and the shaft shoulder; a brake rod acted with the torsion springs to change the step shaft to link or stop together with the hub shaft is arranged in the shell; the operation of the brake rod is controlled by a switch assembly; and the other end of the step shaft passes through the hub shaft and the gearwheel, and the end of the step shaft is provided with a chain wheel for driving a chain to move. The brake structure is reasonable, simple and compact, effectively reduces the transverse width of the electric chain saw, and obviously reduces the overall size and the cost of the electric chain saw.
Description
Technical field
The present invention relates to electric chain saw, particularly a kind of brake structure of electric chain saw.
Background technology
Electric chain saw is a kind of traditional electric tool, in actual mechanical process, has certain danger, if saw chain is run into harder object as tree knot or metal object etc. when the cutting trees, electric chain saw may takeoff to operator's health direction, is commonly called as bounce-back.Run into the situation of this bounce-back, must make the electric chain saw snub, make chain stop motion in a short period of time, to prevent chain incised wound operator.
In order to guarantee safe handling, require when snub, must make chain stop motion in 0.15 second.Realize this function, multiple brake structure is arranged.Wherein a kind of is exactly as shown in Figure 1 torsion spring braking mechanism, this structure is provided with a torsion spring 06 between gear wheel 04 and output shaft 05, hub spindle 041, the output shaft 05 equal interference fit of torsion spring 06 and gear wheel 04, when operate as normal, torsion spring 6 connects into an integral body with hub spindle 04, output shaft 05 frictionally of gear wheel 04, the power that rotatablely moves of motor 02 is passed to sprocket wheel 08 by pinion 03-gear wheel 04-torsion spring 06-output shaft 05, and, realize cutting function by 09 motion of sprocket wheel 08 drive chain.When brake, the front fender of release-push trigger or shake-up electric chain saw is to normal danger, can make brake lever move to normal danger by link gear, at this moment the brake lever top contacts with the afterbody perk section of torsion spring near an end of gear wheel, makes the torsion spring stop motion.This moment, torsion spring still connected into an integral body with the output shaft frictionally, and torsion spring is stopped by brake lever owing to afterbody perk section, torsion spring is slightly opened, frictional force between the hub spindle on torsion spring and the gear wheel reduces, reached the purpose that gear wheel separates with output shaft, thereby made sprocket wheel and chain stop motion.This brake structure is very ripe and adopted in a large number, but this traditional structure has a shortcoming: because torsion spring and output shaft are to be disposed between gear wheel and the sprocket wheel, cause the integrally-built width of electric chain saw bigger, thereby wasted the space.
Summary of the invention
Problem to be solved by this invention just provides a kind of brake structure of electric chain saw of rational in infrastructure, simple compactness, effectively reduces the transverse width of electric chain saw, significantly reduces the complete machine size and the cost of electric chain saw.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of brake structure of electric chain saw, comprise casing, in casing, be provided with drive motors, the rotating shaft spindle nose of drive motors is provided with pinion, in casing, be provided with gear wheel with pinion, gear wheel is by multidiameter switching location, gear wheel is provided with hub spindle and is enclosed within on the multidiameter, one end of multidiameter is provided with the shaft shoulder identical with the hub spindle diameter and is against on the end face of hub spindle, on the hub spindle and the shaft shoulder, be provided with and make the torsion spring of multidiameter with the hub spindle interlock, in casing, be provided with the torsion spring effect and change the brake lever that multidiameter links or stops with hub spindle, brake lever be is characterized in that by the switch assembly control action: the other end of multidiameter passes hub spindle and gear wheel and is provided with sprocket wheel in the end and drives chain movement.
Further, described torsion spring and hub spindle, the equal interference fit of the shaft shoulder.
Further, described switch assembly comprises switch trigger and connecting rod, switch trigger and connecting rod are transferred respectively on casing, be provided with the trend that the compression spring makes the left end of switch trigger keep down and move between the left end of switch trigger and the casing, the right-hand member of switch trigger is pressed on the left end of connecting rod, described brake lever is positioned in the casing by motion bar, the right-hand member switching of motion bar is on casing, the left end of motion bar is pressed on the right-hand member of connecting rod, be provided with the bossy body that falls into casing after the left end that prevents the switch trigger moves downward in the left end end of switch trigger, when the left end of switch trigger moved downward lowest order, bossy body was stuck on the casing outer wall.When electric chain saw was not worked, brake lever kept acting on making electric chain saw be in braking state on the torsion spring; After pressing the right-hand member of switch trigger, the pressure that the left end of connecting rod is subjected to the right-hand member of switch trigger moves downward, the right-hand member of the connecting rod left end that drives motion bar that moves upward moves upward, and then drives that brake lever moves upward and break away from torsion spring and interact, and electric chain saw must be established beginning work by cable simultaneously; Decontrol the switch trigger when needing snub, in the electric chain saw dead electricity, the compression spring moves downward the left end of switch trigger, the right-hand member of switch trigger moves upward and leaves the left end of connecting rod, connecting rod breaks away from the switch trigger role and is subjected to the motion bar effect separately and rotates, the supporting that breaks away from connecting rod simultaneously owing to motion bar, thus motion bar and brake lever fall to making brake lever and torsion spring be used for realizing multidiameter and hub spindle moved apart, chain stop motion in the self gravitation effect.
Further, the end end near gear wheel on the described torsion spring is provided with the perk section, and the lower end of described brake lever is corresponding with the perk section, makes the torsion spring stall make the multidiameter stall to realize the chain stop motion on the perk section thereby fall behind under the brake lever to be against.
Further, be provided with between described brake lever and the casing and make the keep down elastic component of movement tendency of brake lever.
Further, the axis of described brake lever parallel with the end face of gear wheel and with the hub spindle axis normal of gear wheel.
Further, the described casing front end front fender of also having transferred, being provided with ripping bar on front fender stretches in the casing, in casing, be provided with the position-limited rack of the extreme lower position that the restraint bar moves down, brake lever is passed position-limited rack and torsion spring effect, and under the normal condition, front fender tilts near casing, the right-hand member of motion bar is pressed on the left end of ripping bar and locatees, and the console switch trigger is realized electric chain saw work or brake; Under the lock-out state, front fender tilts away from casing, and the left end of ripping bar and the right-hand member of motion bar break away from, and motion bar drops on the position-limited rack, and brake lever is against on the torsion spring, and no matter how the switch trigger is operated, and electric chain saw all is in the brake lock-out state.
Further, the end that an end of the shaft shoulder is set on the described multidiameter is provided with screw thread, is provided with oil pump in casing, and the shaft spindle nose of oil pump is provided with the gear with screw-threaded engagement, and multidiameter drives oil pump and realizes pump oil when rotating.
Further, the end that an end of the shaft shoulder is set on the described multidiameter is provided with worm screw, is provided with oil pump in casing, and the shaft spindle nose of oil pump is provided with the worm gear with worm engaging, and multidiameter drives oil pump and realizes pump oil when rotating.
Further, described drive motors rotating shaft is provided with the cooling fan that rotates with rotating shaft.Can carry out air-cooled to motor and brake structure simultaneously.
After adopting technique scheme, the present invention has following advantage: overall structure is smaller and more exquisite, and configuration design is more flexible, has greatly reduced the cost and the packed and transported volume of electric chain saw.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is the structural representation of the brake structure of original a kind of electric chain saw;
Fig. 2 is the internal structure vertical view of an embodiment of the present invention;
Fig. 3 is an internal structure front view embodiment illustrated in fig. 2;
Fig. 4 is the structural representation that increases front fender on Fig. 3 basis;
Fig. 5 is an A place enlarged drawing among Fig. 3;
Fig. 6 is multidiameter and gear wheel assembly structure schematic diagram.
The specific embodiment
As Fig. 2,3,5, the structural representation of an embodiment of the present invention shown in 6, a kind of brake structure of electric chain saw, comprise casing 1, in casing, be provided with drive motors 2, rotating shaft 21 spindle noses of drive motors are provided with pinion 3, in casing, be provided with gear wheel 4 with pinion, gear wheel is by multidiameter 5 switching location, gear wheel is provided with hub spindle 41 and is enclosed within on the multidiameter, one end of multidiameter is provided with the shaft shoulder 51 identical with the hub spindle diameter and is against on the end face of hub spindle, on the hub spindle and the shaft shoulder, be provided with and make the torsion spring 6 of multidiameter with the hub spindle interlock, in casing, be provided with the torsion spring effect and change the brake lever 7 that multidiameter links or stops with hub spindle, brake lever is by the switch assembly control action, and the other end of multidiameter passes hub spindle and gear wheel and is provided with sprocket wheel 8 in the end and drives chain 9 motions.Described switch assembly comprises switch trigger 11 and connecting rod 12, switch trigger and connecting rod are transferred respectively on casing, be provided with the trend that compression spring 13 makes the left end of switch trigger keep down and move between the left end of switch trigger and the casing, the right-hand member of switch trigger is pressed on the left end of connecting rod, described brake lever is positioned in the casing by motion bar 14, the right-hand member switching of motion bar is on casing, the left end of motion bar is pressed on the right-hand member of connecting rod, be provided with the bossy body 111 that falls into casing after the left end that prevents the switch trigger moves downward in the left end end of switch trigger, when the left end of switch trigger moved downward lowest order, bossy body was stuck on the casing outer wall.When electric chain saw was not worked, brake lever kept acting on making electric chain saw be in braking state on the torsion spring; After pressing the right-hand member of switch trigger, the pressure that the left end of connecting rod is subjected to the right-hand member of switch trigger moves downward, the right-hand member of the connecting rod left end that drives motion bar that moves upward moves upward, and then drives that brake lever moves upward and break away from torsion spring and interact, and electric chain saw must be established beginning work by cable simultaneously; Decontrol the switch trigger when needing snub, in the electric chain saw dead electricity, the compression spring moves downward the left end of switch trigger, the right-hand member of switch trigger moves upward and leaves the left end of connecting rod, connecting rod breaks away from the switch trigger role and is subjected to the motion bar effect separately and rotates, the supporting that breaks away from connecting rod simultaneously owing to motion bar, thus motion bar and brake lever fall to making brake lever and torsion spring be used for realizing multidiameter and hub spindle moved apart, chain stop motion in the self gravitation effect.
In the present embodiment, torsion spring and hub spindle, the equal interference fit of the shaft shoulder.End end near gear wheel on the torsion spring is provided with perk section 61, and the lower end of described brake lever is corresponding with the perk section, makes the torsion spring stall make the multidiameter stall to realize the chain stop motion on the perk section thereby fall behind under the brake lever to be against.Be provided with between brake lever and the casing and make the keep down elastic component 15 of movement tendency of brake lever, elastic component preferably adopts spring.The axis of brake lever parallel with the end face of gear wheel and with the hub spindle axis normal of gear wheel.
In addition as shown in Figure 4, on the foregoing description basis, in the switching of casing front end front fender 16 is arranged, be provided with ripping bar 161 and stretch in the casing on front fender, be provided with the position-limited rack 17 of the extreme lower position that the restraint bar moves down in casing, brake lever is passed position-limited rack and torsion spring effect, under the normal condition, front fender tilts near casing, and the right-hand member of motion bar is pressed on the left end of ripping bar and locatees, and the console switch trigger is realized electric chain saw work or brake; Under the lock-out state, front fender tilts away from casing, and the left end of ripping bar and the right-hand member of motion bar break away from, and motion bar drops on the position-limited rack, and brake lever is against on the torsion spring, and no matter how the switch trigger is operated, and electric chain saw all is in the brake lock-out state.After increasing front fender like this, can shut down the back at electric chain saw and realize the lock brake state, avoid maloperation that electric chain saw is started and cause injury accident, safe and reliable.
Among above-mentioned all embodiment, the end that an end of the shaft shoulder is set on the multidiameter is provided with screw thread 52, is provided with oil pump 10 in casing, and the shaft spindle nose of oil pump is provided with the gear 101 with screw-threaded engagement, and multidiameter drives oil pump and realizes pump oil when rotating.Also the end that an end of the shaft shoulder is set on the multidiameter can be set as worm screw in addition, the worm gear of setting and worm engaging on the shaft spindle nose of oil pump is realized pump oil thereby drive oil pump at multidiameter when rotating.
In the present invention, also be provided with the cooling fan 22 that rotates with rotating shaft in the drive motors rotating shaft.The material of gear wheel adopts wear-resistant plastic or steel, if gear wheel adopts wear-resistant plastic to make, hub spindle is embedded in the gear wheel as mold insert when the gear wheel injection mo(u)lding, becomes as a whole with gear wheel.If gear wheel is a steel, the just direct and gear wheel one machine-shaping of hub spindle.
Except that above preferred embodiment, the present invention also has other embodiment, and those skilled in the art can make various changes and distortion according to the present invention, only otherwise break away from spirit of the present invention, all should belong to the defined scope of claims of the present invention.
Claims (10)
1. the brake structure of an electric chain saw, comprise casing (1), in casing, be provided with drive motors (2), the rotating shaft of drive motors (21) spindle nose is provided with pinion (3), in casing, be provided with gear wheel (4) with pinion, gear wheel is by multidiameter (5) switching location, gear wheel is provided with hub spindle (41) and is enclosed within on the multidiameter, one end of multidiameter is provided with the shaft shoulder (51) identical with the hub spindle diameter and is against on the end face of hub spindle, on the hub spindle and the shaft shoulder, be provided with and make the torsion spring (6) of multidiameter with the hub spindle interlock, in casing, be provided with the torsion spring effect and change the brake lever (7) that multidiameter links or stops with hub spindle, brake lever be is characterized in that by the switch assembly control action: the other end of multidiameter passes hub spindle and gear wheel and is provided with sprocket wheel (8) in the end and drives chain (9) motion.
2. the brake structure of a kind of electric chain saw according to claim 1 is characterized in that: described torsion spring and hub spindle, the equal interference fit of the shaft shoulder.
3. the brake structure of a kind of electric chain saw according to claim 1, it is characterized in that: described switch assembly comprises switch trigger (11) and connecting rod (12), switch trigger and connecting rod are transferred respectively on casing, be provided with the trend that compression spring (13) makes the left end of switch trigger keep down and move between the left end of switch trigger and the casing, the right-hand member of switch trigger is pressed on the left end of connecting rod, described brake lever is positioned in the casing by motion bar (14), the right-hand member switching of motion bar is located on casing, the left end of motion bar is pressed on the right-hand member of connecting rod, be provided with the bossy body (111) that falls into casing after the left end that prevents the switch trigger moves downward in the left end end of switch trigger, when the left end of switch trigger moved downward lowest order, bossy body was stuck on the casing outer wall.
4. according to the brake structure of claim 1 or 3 described a kind of electric chain saws, it is characterized in that: the end end near gear wheel on the described torsion spring is provided with perk section (61), the lower end of described brake lever is corresponding with the perk section, makes the torsion spring stall make the multidiameter stall to realize the chain stop motion on the perk section thereby fall behind under the brake lever to be against.
5. according to the brake structure of claim 1 or 3 described a kind of electric chain saws, it is characterized in that: be provided with between described brake lever and the casing and make the keep down elastic component (15) of movement tendency of brake lever.
6. the brake structure of a kind of electric chain saw according to claim 5 is characterized in that: the axis of described brake lever parallel with the end face of gear wheel and with the hub spindle axis normal of gear wheel.
7. according to the brake structure of claim 1 or 3 described a kind of electric chain saws, it is characterized in that: the described casing front end front fender (16) of also having transferred, being provided with ripping bar (161) on front fender stretches in the casing, in casing, be provided with the position-limited rack (17) of the extreme lower position that the restraint bar moves down, brake lever is passed position-limited rack and torsion spring effect, under the normal condition, front fender tilts near casing, the right-hand member of motion bar is pressed on the left end of ripping bar and locatees, and the console switch trigger is realized electric chain saw work or brake; Under the lock-out state, front fender tilts away from casing, and the left end of ripping bar and the right-hand member of motion bar break away from, and motion bar drops on the position-limited rack, and brake lever is against on the torsion spring, and no matter how the switch trigger is operated, and electric chain saw all is in the brake lock-out state.
8. the brake structure of a kind of electric chain saw according to claim 1, it is characterized in that: the end that an end of the shaft shoulder is set on the described multidiameter is provided with screw thread (52), in casing, be provided with oil pump (10), the shaft spindle nose of oil pump is provided with the gear (101) with screw-threaded engagement, and multidiameter drives oil pump and realizes pump oil when rotating.
9. the brake structure of a kind of electric chain saw according to claim 1, it is characterized in that: the end that an end of the shaft shoulder is set on the described multidiameter is provided with worm screw, in casing, be provided with oil pump, the shaft spindle nose of oil pump is provided with the worm gear with worm engaging, and multidiameter drives oil pump and realizes pump oil when rotating.
10. the brake structure of a kind of electric chain saw according to claim 1 is characterized in that: described drive motors rotating shaft is provided with the cooling fan (22) that rotates with rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100039116A CN102172927A (en) | 2011-01-11 | 2011-01-11 | Brake structure of electric chain saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100039116A CN102172927A (en) | 2011-01-11 | 2011-01-11 | Brake structure of electric chain saw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102172927A true CN102172927A (en) | 2011-09-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100039116A Pending CN102172927A (en) | 2011-01-11 | 2011-01-11 | Brake structure of electric chain saw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102172927A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104604548A (en) * | 2013-11-05 | 2015-05-13 | 南京德朔实业有限公司 | Electric gardening tool |
| CN104960038A (en) * | 2015-07-13 | 2015-10-07 | 溯洄（上海）设计咨询有限公司 | Electric chain saw |
| CN112385429A (en) * | 2020-11-23 | 2021-02-23 | 广东电网有限责任公司佛山供电局 | Branches of tall trees saw |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3857179A (en) * | 1974-04-22 | 1974-12-31 | Desa Industries | Chain saw |
| GB2335625A (en) * | 1998-03-24 | 1999-09-29 | Bosch Gmbh Robert | Chain saw with brake/clutch assembly |
| CN201179671Y (en) * | 2007-11-27 | 2009-01-14 | 浙江亚特电器有限公司 | Electric chain saw |
| CN201192864Y (en) * | 2008-04-23 | 2009-02-11 | 肖长江 | Brake structure for horizontal chain saw |
| CN101380745A (en) * | 2007-09-06 | 2009-03-11 | 黄理 | Electric chain saw |
| CN101570027A (en) * | 2008-04-30 | 2009-11-04 | 苏州宝时得电动工具有限公司 | Electric tool brake apparatus |
| CN202045687U (en) * | 2011-01-11 | 2011-11-23 | 浙江亚特电器有限公司 | Brake structure of electric chain saw |
-
2011
- 2011-01-11 CN CN2011100039116A patent/CN102172927A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3857179A (en) * | 1974-04-22 | 1974-12-31 | Desa Industries | Chain saw |
| GB2335625A (en) * | 1998-03-24 | 1999-09-29 | Bosch Gmbh Robert | Chain saw with brake/clutch assembly |
| CN101380745A (en) * | 2007-09-06 | 2009-03-11 | 黄理 | Electric chain saw |
| CN201179671Y (en) * | 2007-11-27 | 2009-01-14 | 浙江亚特电器有限公司 | Electric chain saw |
| CN201192864Y (en) * | 2008-04-23 | 2009-02-11 | 肖长江 | Brake structure for horizontal chain saw |
| CN101570027A (en) * | 2008-04-30 | 2009-11-04 | 苏州宝时得电动工具有限公司 | Electric tool brake apparatus |
| CN202045687U (en) * | 2011-01-11 | 2011-11-23 | 浙江亚特电器有限公司 | Brake structure of electric chain saw |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104604548A (en) * | 2013-11-05 | 2015-05-13 | 南京德朔实业有限公司 | Electric gardening tool |
| CN104960038A (en) * | 2015-07-13 | 2015-10-07 | 溯洄（上海）设计咨询有限公司 | Electric chain saw |
| CN112385429A (en) * | 2020-11-23 | 2021-02-23 | 广东电网有限责任公司佛山供电局 | Branches of tall trees saw |
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Application publication date: 20110907 |