CN113119231B - Brake mechanism of chain saw and chain saw - Google Patents

Brake mechanism of chain saw and chain saw Download PDF

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Publication number
CN113119231B
CN113119231B CN201911402902.7A CN201911402902A CN113119231B CN 113119231 B CN113119231 B CN 113119231B CN 201911402902 A CN201911402902 A CN 201911402902A CN 113119231 B CN113119231 B CN 113119231B
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CN
China
Prior art keywords
brake
chain saw
rotating shaft
trigger
arm
Prior art date
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Application number
CN201911402902.7A
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Chinese (zh)
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CN113119231A (en
Inventor
倪祖根
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.)
Lexy Electric Green Energy Technology Suzhou Co Ltd
Suzhou Kingclean Precision Machinery Co Ltd
Original Assignee
Lexy Electric Green Energy Technology Suzhou Co Ltd
Suzhou Kingclean Precision Machinery 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.)
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Publication date
Application filed by Lexy Electric Green Energy Technology Suzhou Co Ltd, Suzhou Kingclean Precision Machinery Co Ltd filed Critical Lexy Electric Green Energy Technology Suzhou Co Ltd
Priority to CN201911402902.7A priority Critical patent/CN113119231B/en
Publication of CN113119231A publication Critical patent/CN113119231A/en
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Publication of CN113119231B publication Critical patent/CN113119231B/en
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    • 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
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/08—Other tools for pruning, branching or delimbing standing trees
    • A01G3/085—Motor-driven saws for pruning or branching
    • A01G3/086—Chain saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D57/00—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00
    • B23D57/02—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00 with chain saws
    • B23D57/023—Sawing machines or sawing devices not covered by one of the preceding groups B23D45/00 - B23D55/00 with chain saws hand-held or hand-operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • 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
    • B27B17/08—Drives or gearings; Devices for swivelling or tilting the chain saw
    • B27B17/083—Devices for arresting movement of the saw chain
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/08—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws
    • B28D1/082—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws consisting of chain saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Forests & Forestry (AREA)
  • Wood Science & Technology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Sawing (AREA)

Abstract

The invention discloses a braking mechanism of a chain saw, which comprises a power output shaft, wherein the chain saw comprises a trigger, a linkage assembly connected with the trigger, a brake block arranged on the linkage assembly and a brake disc sleeved on the power output shaft, the linkage assembly comprises a brake lever contacted with the trigger and a brake arm connected with the brake lever, the brake block is arranged on the brake arm, the trigger drives the brake lever to rotate, the brake lever drives the brake arm to rotate, and the brake arm drives the brake block to contact or separate from the brake disc. The chain saw braking mechanism and the chain saw are reliable in structure and avoid safety risks.

Description

Brake mechanism of chain saw and chain saw
Technical Field
The invention relates to the technical field of chain saw safety, in particular to a chain saw braking mechanism and a chain saw.
Background
A chain saw is a conventional electric tool, and in actual operation, there is a danger that the chain saw must be braked urgently when danger occurs, and the movement of the chain is stopped in a short time to prevent the chain from cutting the operator.
The existing chain saw has the defects that the braking mechanism is complete at the beginning of use, and the braking time after the trigger is released can basically meet the safety requirements. However, when the product is used for a period of time, the braking mechanism is incomplete due to abrasion of the transmission assembly, etc., and the braking time may exceed the safety standard, which is a safety risk.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art, and provides a chain saw braking mechanism and a chain saw, which are reliable in structure and avoid safety risks.
In order to achieve the above object, the invention provides a brake mechanism of a chain saw, which comprises a power output shaft, wherein the brake mechanism comprises a trigger, a linkage assembly connected with the trigger, a brake block arranged on the linkage assembly and a brake disc sleeved on the power output shaft, the linkage assembly comprises a brake lever contacted with the trigger and a brake arm connected with the brake lever, the brake block is arranged on the brake arm, the trigger drives the brake lever to rotate, the brake lever drives the brake arm to rotate, and the brake arm drives the brake block to contact or separate from the brake disc.
Further, the brake lever comprises a transmission part, a boss is arranged on the transmission part, a waist-shaped groove is formed in the brake arm, and the boss is arranged in the waist-shaped groove and can slide in the waist-shaped groove.
Further, the brake lever further comprises a pressing part connected with the transmission part, and a first rotating shaft arranged between the pressing part and the transmission part, the chain saw further comprises a machine shell, the first rotating shaft is fixed on the machine shell, and the pressing part rotates around the first rotating shaft and drives the transmission part to rotate.
Further, the chain saw further comprises a power outer cover sleeved outside the power output shaft, a second rotating shaft is arranged on the power outer cover, and the brake arm is sleeved on the second rotating shaft and can rotate around the second rotating shaft.
Further, a torsion spring is arranged between the power outer cover and the brake arm, and the torsion spring is sleeved on the second rotating shaft.
Further, the torsion spring comprises a first end and a second end, the first end is fixed on the brake arm, a limiting rib is arranged on the power housing, and the second end is abutted to the limiting rib.
Further, a third rotating shaft is further arranged on the casing, and the trigger is sleeved on the third rotating shaft and can rotate around the third rotating shaft.
Further, the trigger comprises a hand pressing part and a connecting part, wherein the hand pressing part is exposed out of the shell, and the connecting part is contacted with the pressing part.
Further, the power output shaft and the brake disc are integrally formed.
In order to achieve the above object, the present invention also proposes a chain saw equipped with the brake mechanism of the chain saw.
Compared with the prior art, the invention has the advantages that:
the brake mechanism adopts the trigger to drive the brake lever to rotate, and the brake lever is linked with the brake arm, so that a brake pad on the brake arm is contacted with or separated from a brake disc on the power output shaft, the structure is simple and reliable, and the safety risk is effectively avoided while the brake requirement is met.
Drawings
FIG. 1 is a schematic view of the trigger in the present invention in a depressed (rotated) condition.
FIG. 2 is a schematic view of the trigger release (complete machine shutdown) condition of the present invention.
FIG. 3 is a schematic diagram showing a specific structure of the brake mechanism according to the present invention.
Fig. 4 is a schematic structural view of a brake mechanism of a chain saw according to the present invention.
Fig. 5 is a sectional view of section A-A of fig. 4.
FIG. 6 is a schematic view of the torsion spring and brake arm of the present invention.
FIG. 7 is a schematic view of the torsion spring and the power housing of the present invention.
Wherein reference numerals are as follows:
1. a power output shaft; 2. a trigger; 3. a linkage assembly; 4. a brake pad; 5. a brake disc; 6. a housing; 7. a power housing; 21. a third rotating shaft; 22. a hand pressing part; 23. a connection part; 31. a brake lever; 32. a brake arm; 311. a pressing part; 312. a transmission part; 313. a first rotating shaft; 314. a boss; 321. a kidney-shaped groove; 322. a second rotating shaft; 323. a torsion spring; 323a, a first end; 323b, a second end; 71. and a limit rib.
Detailed Description
The technical scheme of the present invention is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings.
As shown in fig. 1 to 3, a brake mechanism of a chain saw according to a preferred embodiment of the present invention, wherein the chain saw includes a housing 6, a power output shaft 1, and a power housing 7 sleeved outside the power output shaft 1, in addition to the brake mechanism. The brake mechanism comprises a trigger 2, a linkage assembly 3 connected with the trigger 2, a brake block 4 arranged on the linkage assembly 3 and a brake disc 5 sleeved on the power output shaft 1, wherein the power output shaft 1 sequentially penetrates through a power outer cover 7 and the brake disc 5 and is preferably integrally formed with the brake disc 5 or is integrally connected through a spline and the like. Further, the linkage assembly 3 comprises a brake lever 31 contacted with the trigger 2 and a brake arm 32 connected with the brake lever 31, the trigger 2 drives the brake lever 31 to rotate, the brake lever 31 drives the brake arm 32 to rotate, the brake pad 4 is arranged on the brake arm 32, the brake arm 32 drives the brake pad 4 to contact or separate from the brake disc 5, and the brake pad 4 is preferably a brake pad.
Specifically, the brake lever 31 includes a pressing portion 311 connected to the trigger 2, a transmission portion 312 connected to the pressing portion 311, and a first rotation shaft 313 provided between the pressing portion 311 and the transmission portion 312, the first rotation shaft 313 being fixed to the housing 6, the pressing portion 311 rotating about the first rotation shaft 313 and driving the transmission portion 312 to rotate. The transmission part 312 is provided with a boss 314, the brake arm 32 is provided with a kidney-shaped groove 321, and the boss 314 is arranged in the kidney-shaped groove 321 and can slide in the kidney-shaped groove 321. The transmission part 312 can be bent according to actual requirements, so that two ends of the transmission part are not on the same plane, thereby meeting the condition that the trigger 2 and the brake disc 5 are not on the same plane, and further meeting the installation requirement of the whole machine.
The power housing 7 is provided with a second rotating shaft 322, and the brake arm 32 is sleeved on the second rotating shaft 322 and can rotate around the second rotating shaft 322. As shown in fig. 4 to 7, a torsion spring 323 is disposed between the power housing 7 and the brake arm 32, the torsion spring 323 is sleeved on the second rotating shaft 322 to provide a restoring force for the brake arm 32, the torsion spring 323 includes a first end 323a and a second end 323b, wherein the first end 323a is fixed on the brake arm 32, the second end 323b is abutted on a limit rib 71 of the power housing 7, when the trigger 2 is pressed, the brake lever 31 rotates to drive the brake arm 32 to rotate, the brake arm 32 drives the first end 323a of the torsion spring 323 to rotate, the second end 323b contacts with the limit rib 71, and the limit rib 71 can limit the second end 323b to rotate in a rotation direction relative to the first end 323a, so that the torsion spring 323 is in a compressed state; when the trigger 2 is released, the torsion spring 323 has a restoring force due to the compressed state, and the restoring force drives the brake arm 32 to rotate back to the initial position, so that the brake pad 4 contacts the brake disc 5.
The casing 6 is also provided with a third rotating shaft 21, and the trigger 2 is sleeved on the third rotating shaft 21 and can rotate around the third rotating shaft 21. The trigger 2 comprises a hand pressing part 22 and a connecting part 23, wherein the hand pressing part 22 is exposed outside the casing 6, so that the operation of an operator is facilitated, and the connecting part 23 is contacted with the pressing part 311.
In use, an operator presses the hand pressing portion 22 (shown in fig. 1) of the trigger 2, the trigger 2 rotates around the third rotating shaft 21, the connecting portion 23 presses the pressing portion 311 of the brake lever 31, the pressing portion 311 rotates around the first rotating shaft 313 and drives the transmission portion 312 to rotate, the boss 314 also rotates around the first rotating shaft 313 and slides in the kidney slot 321, the brake arm 32 rotates around the second rotating shaft 322 and overcomes the elastic force of the torsion spring 323, and accordingly the brake pad 4 is separated from the brake disc 5, and the chain saw normally rotates.
When the trigger 2 is released (as shown in fig. 2), the compressed torsion spring 323 drives the brake arm 32 to rebound, so that the brake pad 4 contacts the brake disc 5 to generate friction force, and under the action of the friction force, the residual inertial kinetic energy of the chain saw is consumed, so that the braking function is realized. The trigger 2 and the brake lever 31 are also reset by the brake arm 32.
According to the braking mechanism and the chain saw, the trigger is adopted to drive the braking lever to rotate, and the braking lever is linked with the braking arm, so that the braking sheet on the braking arm is contacted with or separated from the braking disc on the power output shaft, the structure is simple and reliable, and the safety risk is effectively avoided while the braking requirement is met; the brake mechanism can be flexibly applied to chain saws with triggers and brake discs on any plane.
It should be noted that the foregoing description of the preferred embodiments is merely illustrative of the technical concept and features of the present invention, and is not intended to limit the scope of the invention, as long as the scope of the invention is defined by the claims and their equivalents. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims (5)

1. A brake mechanism for a chain saw, the chain saw comprising a power output shaft (1), characterized in that: the brake mechanism comprises a trigger (2), a linkage assembly (3) connected with the trigger (2), a brake block (4) installed on the linkage assembly (3) and a brake disc (5) sleeved on the power output shaft (1), the power output shaft (1) sequentially penetrates through a power outer cover (7) and the brake disc (5), the power output shaft (1) and the brake disc (5) are integrally formed or connected into a whole through a spline, the linkage assembly (3) comprises a brake lever (31) contacted with the trigger (2) and a brake arm (32) connected with the brake lever (31), the brake block (4) is installed on the brake arm (32), the trigger (2) drives the brake lever (31) to rotate, the brake arm (32) is driven by the brake arm (32) to contact or separate from the brake disc (5), and when the brake block (4) contacts the brake disc (5), residual kinetic energy of friction is consumed by the chain saw;
the brake lever (31) comprises a transmission part (312), a boss (314) is arranged on the transmission part (312), a waist-shaped groove (321) is formed in the brake arm (32), and the boss (314) is arranged in the waist-shaped groove (321) and can slide in the waist-shaped groove (321);
the brake lever (31) further comprises a pressing part (311) connected with the transmission part (312), and a first rotating shaft (313) arranged between the pressing part (311) and the transmission part (312), the chain saw further comprises a machine shell (6), the first rotating shaft (313) is fixed on the machine shell (6), and the pressing part (311) rotates around the first rotating shaft (313) and drives the transmission part (312) to rotate;
the chain saw further comprises a power outer cover (7) sleeved outside the power output shaft (1), a second rotating shaft (322) is arranged on the power outer cover (7), and the brake arm (32) is sleeved on the second rotating shaft (322) and can rotate around the second rotating shaft (322); a torsion spring (323) is arranged between the power outer cover (7) and the brake arm (32), and the torsion spring (323) is sleeved on the second rotating shaft (322).
2. The brake mechanism of the chain saw as set forth in claim 1, wherein: the torsion spring (323) comprises a first end (323 a) and a second end (323 b), the first end (323 a) is fixed on the brake arm (32), a limiting rib (71) is arranged on the power outer cover (7), and the second end (323 b) is abutted to the limiting rib (71).
3. The brake mechanism of the chain saw as set forth in claim 1, wherein: the casing (6) is also provided with a third rotating shaft (21), and the trigger (2) is sleeved on the third rotating shaft (21) and can rotate around the third rotating shaft (21).
4. The brake mechanism of the chain saw as set forth in claim 1, wherein: the trigger (2) comprises a hand pressing part (22) and a connecting part (23), wherein the hand pressing part (22) is exposed out of the shell (6), and the connecting part (23) is contacted with the pressing part (311).
5. A chain saw equipped with the brake mechanism of the chain saw as set forth in any one of claims 1 to 4.
CN201911402902.7A 2019-12-31 2019-12-31 Brake mechanism of chain saw and chain saw Active CN113119231B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911402902.7A CN113119231B (en) 2019-12-31 2019-12-31 Brake mechanism of chain saw and chain saw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911402902.7A CN113119231B (en) 2019-12-31 2019-12-31 Brake mechanism of chain saw and chain saw

Publications (2)

Publication Number Publication Date
CN113119231A CN113119231A (en) 2021-07-16
CN113119231B true CN113119231B (en) 2023-06-13

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Application Number Title Priority Date Filing Date
CN201911402902.7A Active CN113119231B (en) 2019-12-31 2019-12-31 Brake mechanism of chain saw and chain saw

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114378903A (en) * 2021-11-29 2022-04-22 浙江亚特电器股份有限公司 Brake mechanism for electric chain saw and electric chain saw

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19931251A1 (en) * 1999-07-07 2001-01-11 Bosch Gmbh Robert Chainsaw
DE10214585A1 (en) * 2002-04-03 2003-10-16 Tts Tooltechnic Systems Ag chainsaw
CN202045687U (en) * 2011-01-11 2011-11-23 浙江亚特电器有限公司 Brake structure of electric chain saw
CN102398078B (en) * 2011-10-25 2013-12-18 浙江亚特电器有限公司 Mechanical brake structure of chain saw
CN202746460U (en) * 2012-09-20 2013-02-20 浙江格林雅动力科技有限公司 Brake device of electric chain saw
CN103419251B (en) * 2013-08-09 2014-12-10 宁波好使特电器有限公司 Chain saw
CN103770158B (en) * 2014-01-10 2016-05-11 浙江亚特电器有限公司 A kind of brake structure of electric chain saw

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