CN102119607A - Brake device for grass cutter - Google Patents
Brake device for grass cutter Download PDFInfo
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- CN102119607A CN102119607A CN 201110000696 CN201110000696A CN102119607A CN 102119607 A CN102119607 A CN 102119607A CN 201110000696 CN201110000696 CN 201110000696 CN 201110000696 A CN201110000696 A CN 201110000696A CN 102119607 A CN102119607 A CN 102119607A
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- brake
- mower
- output shaft
- drive
- brake disc
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Abstract
The invention discloses a brake device for a grass cutter, which comprises a driving motor, an output shaft, a transmission wheel, a bracket for mounting the driving motor and the output shaft, a brake sleeve fixed on the bracket, a brake assembly arranged along the outer wall of the brake sleeve and a brake disc linked with the output shaft, wherein the brake assembly is rotatably connected to the brake disc; the brake disc is moveably arranged in the transmission wheel through a limiting transmission structure; the transmission wheel is provided with a guiding structure; and when the brake disc and the brake assembly have inertia rotating motion under the driving of the output shaft in sequence, the brake assembly contracts inwards under the action of the guiding structure and holds the outer wall of the brake sleeve, thereby realizing braking. The brake device for a grass cutter has the characteristics that the structure is simple, the property is stable, the assembling is convenient, the brake response is quick, and the cost is low.
Description
Technical field
The present invention relates to the brake gear of mower.
Background technology
Mower is a kind of gardens electric tool commonly used, generally uses motor as driving, drives the main shaft that blade is housed by drive mechanisms such as belt or gears and carries out operation.If need in the operation process to shut down, at first cut off the electricity supply, but blade still can run up a period of time under effect of inertia, there is potential safety hazard, just need a brake gear control its motion for this reason, avoid causing personal injury.Present existing brake gear specifically can be divided into three kinds: mechanical brake, electric brake and motor brake.China national Department of Intellectual Property discloses the patent No. in 2007-05-30 and 2010-07-28 and has been " 200620068384.1 ", " 200910028299.0 " two kinds of mower brakes, the brake principle is roughly the same, promptly produce brake force by the friction between brake block and the brake disc, thereby make the stall of blade main shaft, though the mode that the control brake block contacts with brake disc is different, but brake block all is to contact to produce friction then on blade main shaft axial direction with brake disc, be understandable that: the blade main shaft is rotatablely moving on the circumferencial direction, have only directly and on its circumference inverse direction, apply brake force, could realize principal shaft braking preferably, and on its axial direction, apply brake force, though can reach the purpose of braking equally, but only some is converted into the frictional force on the circumferencial direction to this brake force, so not only influence retardation efficiency, also can quicken the wearing and tearing of brake block.
Summary of the invention
Problem to be solved by this invention just provides a kind of mower brake, have simple in structure, stable performance, easy to assembly, braking response is fast, the low characteristics of holding concurrently of cost.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: mower brake, comprise the support that drive motors, output shaft, drive, installation drive motors and output shaft are used, it is characterized in that: also comprise the brake cover that is fixed on the support, the brake assembly that edge brake cover outer wall is provided with and the brake disc that links with output shaft, described brake assembly is rotatably connected on the brake disc, described brake disc is movably arranged in the drive by spacing drive mechanism, and described drive is provided with guide frame; When output shaft drove brake disc, brake assembly successively and rotatablely moves as inertia, described brake assembly inwardly shrank under the effect of guide frame and holds brake cover outer wall tightly and realize braking.
Further, described spacing drive mechanism comprises two lugs being located on the brake disc outer rim, and the drive inwall has the arc stopper slot that reciprocatingly slides in a circumferential direction for lug, and described brake assembly is rotatably connected on two lugs.
Further, described brake disc upper end is provided with the edge, top of radially protruding, and described drive inwall is provided with positioning step, and after brake disc embedded drive, described top was along being connected on the positioning step.Guarantee the output shaft smooth rotation.
Further, described brake assembly comprises two brake block, is embedded with friction plate in the described brake block, and brake block one end is rotatably connected on the lug of brake disc by trundle.
Further, described guide frame is to be located on the drive upper surface two a guiding piece, and the medial surface that described guiding is propped up piece is designed to the gradually open surface that reduces gradually along output shaft direction of rotation radius of curvature; Under the mower stopped status, the free end of described brake block is against the gradually bigger end of open surface curvature.
Further, the brake disc upper surface is provided with two axial raised adjustment pieces, is used to control the fit clearance between a brake block and the guiding piece, guarantees that brake block can turn round flexibly in the brake process, improves brake speed and sensitivity.
Further, the lateral surface that described guiding is propped up piece is designed to arcwall face, is provided with an extension spring along a guiding piece lateral surface, and described extension spring one end is articulated on the guiding piece, and the other end is articulated on the change-over terminal of brake block.Under the mower braking state, utilize extension spring that a brake block and a guiding piece are strained in opposite directions, keep the reverse motions state between drive and the brake disc to hold tightly on brake cover outer wall until brake block, after the rotation that has suppressed brake block, brake disc, output shaft are also corresponding to stop operating, and realizes brake; Extension spring has been played and has been reduced the braking response time, improves the purpose of braking effect.
Further, under the mower stopped status, described extension spring is in first extended state, and running clearance is all left at the two ends of lug and arc stopper slot; Under the mower duty, described extension spring is in second extended state, and lug is against arc stopper slot one end and by arc stopper slot driven rotary, friction plate does not contact with brake cover outer wall; Under mower stopped braking state, extension spring is in the 3rd extended state made friction plate be close to brake cover outer wall.Lug cooperates the effect of extension spring not only can prevent to lose braking quality behind the friction disc wear with the running clearance that the two ends of arc stopper slot are reserved, can also guarantee that when mower is worked friction plate can not influence the normal rotation of output shaft, reaches the purpose of stable performance.
Further, described drive top is provided with cover plate, and described cover plate is fixed on the guiding piece, the cover plate outer rim baffle plate that has been periphery, and described brake block, a guiding piece and extension spring are housed in the space that baffle plate surrounds.Set up baffle plate and not only play protective action, can also limit on the brake block and scurry, prevent that extension spring from being thrown away by centrifugal force.
Further, described output shaft upper end is rotatably connected on the support by bearing assembly, and output shaft end is provided with down play of jump ring restriction output shaft; The mowing blade is fixed tightly in the output shaft lower end by pressing plate and locking nut.
Beneficial effect of the present invention:
1, compare the brake of existing electric brake and motor, brake gear structure provided by the present invention is simpler, and brake gear has been transferred on the output shaft of mowing blade, and braking effect improves;
2, utilize brake block directly to hold the brake cover tightly and realize braking, braking response is fast, and output shaft and the stall at short notice of mowing blade thereof avoid causing personal injury;
3, brake disc cooperates the effect of extension spring with the spacing drive mechanism between the drive, not only can prevent to lose braking quality behind the friction disc wear, prolongs the service life of brake gear; Can also guarantee that when mower is worked friction plate can not influence the normal rotation of output shaft, reaches the purpose of stable performance.
Description of drawings
The present invention is described further below in conjunction with accompanying drawing:
Fig. 1 is a general assembly drawing of the present invention;
Fig. 2 is an installation diagram of the present invention;
Fig. 3 is the enlarged drawing of brake disc and drive;
State diagram when Fig. 4 shuts down for mower;
State diagram when Fig. 5 works for mower;
State diagram when Fig. 6 brakes for mower.
Embodiment
With reference to Fig. 1-3, mower brake, comprise drive motors 1, output shaft 3, drive 7, install drive motors 1 and output shaft 3 usefulness support 2, be fixed on brake cover 4 on the support 2, the brake assembly 5 that is provided with along brake cover 4 outer walls and with the brake disc 6 of output shaft 3 interlocks, on the main shaft of drive motors 1, be connected with small pulley 11, pass through belt 12 transmissions between small pulley 11 and the drive 7; Brake assembly 5 is rotatably connected on the brake disc 6, and described brake disc 6 is movably arranged in the drive 7 by spacing drive mechanism, and described drive 7 is provided with guide frame; When output shaft 3 drove brake disc 6, brake assembly 5 successively and rotatablely moves as inertia, described brake assembly 5 inwardly shrank under the effect of guide frame and holds brake cover 4 outer walls tightly and realize braking.
Spacing drive mechanism comprises two lugs 60 being located on brake disc 6 outer rims, and drive 7 inwalls have the arc stopper slot 72 that reciprocatingly slides in a circumferential direction for lug 60, and described brake assembly 5 is rotatably connected on two lugs 60; Brake disc 6 upper ends are provided with radially the top of protruding along 61, and described drive 7 inwalls are provided with positioning step 71, and after brake disc 6 embedded drives 7, described top was connected on the positioning step 71 along 61, guarantees output shaft 3 smooth rotation; Brake assembly 5 is two brake block 50, is embedded with friction plate 51 in the brake block 50, and brake block 50 1 ends are rotatably connected on the lug 60 of brake disc 6 by trundle 52.
Guide frame is to be located on drive 7 upper surfaces two a guiding piece 70, and the medial surface of a guiding piece 70 is designed to the gradually open surface 701 that reduces gradually along output shaft 3 direction of rotation radius of curvature; Under the mower stopped status, the free end of brake block 50 is against the gradually bigger end of open surface 701 curvature.Brake disc 6 upper surfaces are provided with two axial raised adjustment pieces 62, are used to control the fit clearance between a brake block 50 and the guiding piece 70, guarantee that brake block can turn round flexibly in the brake process, improve brake speed and sensitivity.For reducing the braking response time, improve braking effect, the lateral surface that guiding is propped up piece 70 is designed to arcwall face 702, along guiding piece 70 lateral surface one extension spring 73 is set, extension spring 73 1 ends are articulated on the guiding piece 70, and the other end is articulated on the change-over terminal of brake block 50; Under the mower braking state, utilize extension spring 73 that a brake block 50 and a guiding piece 70 are strained in opposite directions, the reverse motions state is held tightly on brake cover 4 outer walls until brake block 50 between maintenance drive 7 and the brake disc 6, and promptly output shaft 3, mowing blade stop the rotation.
Also be provided with cover plate 8 above drive 7, cover plate 8 is fixed on guiding the piece 70 by screw, the cover plate 8 outer rims baffle plate 80 that has been periphery, and brake block 50, a guiding piece 70 and extension spring 73 all are housed in the space that baffle plate 80 surrounded; Set up baffle plate 80 and not only play protective action, can also limit and scurry, prevent that extension spring 73 from being thrown away by centrifugal force on the brake block 50.
The upper end of output shaft 3 utilizes bearing I 30, bearing I I31 to be rotatably connected on the support 2, and down play of jump ring 32 restriction output shafts 3 is set; Mowing blade 9 is fixed tightly in output shaft 3 lower ends by pressing plate 33 and locking nut 34.
With reference to Fig. 4, under the mower stopped status, drive motors 1 all remains static with mowing blade 9, and extension spring 73 is in first extended state, and brake block 50 is owing to be subjected to extension spring 73 pulling force, and friction plate 51 contacts with brake cover 4 outer walls; Therefore the pulling force of extension spring 73 is very little the time, and the frictional force between friction plate 51 and the brake cover 4 is also very little, and drive motors 1 starts can easily can overcome this frictional force rotation.Under the mower stopped status, lug 60 respectively leaves running clearance A and running clearance C with arc stopper slot 72 two ends of drive 7, because the existence of running clearance A, friction plate 51 is in released state with brake cover 4 outer walls during mower work under action of centrifugal force, its gap is controlled at about 0.1-0.5mm, be generally 0.3mm, guarantee that friction plate 51 can not influence output shaft 3 and normally rotate; Running clearance C then can prevent to lose braking quality after friction plate 51 from slowly wearing and tearing.
With reference to Fig. 5, drive motors 1 is opened, and mower is in running order, and at this moment, brake disc 6, output shaft 3 and mowing blade 9 be because inertia will keep of short duration static, and drive 7 will drive brake disc 6 and rotate together after lug 60 turns over running clearance A.Under this state, the pulling force of extension spring 73 can be ignored under the driving force of drive motors, after reaching steady-working state, keep a relative static state between brake disc 6 and the drive 7, friction plate 51 is in released state with brake cover 4 outer walls under action of centrifugal force.
With reference to Fig. 6, to cut off the electricity supply, drive motors 1 quits work, because the moment of inertia of drive motors 1 is less, the main shaft of drive motors 1 can stop earlier by specific output axle 3 under the effect of frictional force and fan blade resistance.The drive 7 that loses driving force is rotated counterclockwise under the effect of extension spring 73, this moment, output shaft 3 still turned clockwise under effect of inertia, output shaft 3 produces reverse motions in a circumferential direction with drive 7, above-mentioned motion is passed to when brake block 50 props up on the piece 70 with guiding and shows as: brake block 50 turns clockwise, and a guiding piece 70 is rotated counterclockwise relatively, and has speed difference between the two, utilize this speed difference, gradually open surface 701 on the guiding piece 70 orders about brake block 50 and draws close gradually to brake cover 4 outer walls, and finally holds tightly on brake cover 4 outer walls; After the rotation that has suppressed brake block 50, brake disc 6, output shaft 3 and mowing blade 9 are also corresponding to stop operating, and reaches the purpose of brake.
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. mower brake, comprise drive motors (1), output shaft (3), drive (7), the support (2) of drive motors (1) and output shaft (3) usefulness is installed, it is characterized in that: also comprise the brake cover (4) that is fixed on the support (2), the brake assembly (5) that edge brake cover (4) outer wall is provided with and the brake disc (6) that links with output shaft (3), described brake assembly (5) is rotatably connected on the brake disc (6), described brake disc (6) is movably arranged in the drive (7) by spacing drive mechanism, and described drive (7) is provided with guide frame; Drive brake disc (6), brake assembly (5) successively when rotatablely moving as inertia at output shaft (3), described brake assembly (5) inwardly shrinks under the effect of guide frame and holds brake cover (4) outer wall tightly and realize braking.
2. mower brake according to claim 1, it is characterized in that: described spacing drive mechanism comprises two lugs (60) of being located on brake disc (6) outer rim, drive (7) inwall has the arc stopper slot (72) that reciprocatingly slides in a circumferential direction for lug (60), and described brake assembly (5) is rotatably connected on two lugs (60).
3. mower brake according to claim 2, it is characterized in that: described brake disc (6) upper end is provided with the edge, top (61) of radially protruding, described drive (7) inwall is provided with positioning step (71), after brake disc (6) embedded drive (7), described top was connected on the positioning step (71) along (61).
4. according to claim 2 or 3 described mower brakes, it is characterized in that: described brake assembly (5) comprises two brake block (50), be embedded with friction plate (51) in the described brake block (50), brake block (50) one ends are rotatably connected on the lug (60) of brake disc (6) by trundle (52).
5. mower brake according to claim 4, it is characterized in that: described guide frame is for being located on drive (7) upper surface two a guiding piece (70), and the medial surface that described guiding is propped up piece (70) is designed to the gradually open surface (701) that reduces gradually along output shaft (3) direction of rotation radius of curvature; Under the mower stopped status, the free end of described brake block (50) is against the gradually bigger end of open surface (701) curvature.
6. mower brake according to claim 5 is characterized in that: brake disc (6) upper surface is provided with two axial raised adjustment pieces (62).
7. according to claim 5 or 6 described mower brakes, it is characterized in that: the lateral surface that described guiding is propped up piece (70) is designed to arcwall face (702), be provided with an extension spring (73) along guiding piece (a 70) lateral surface, described extension spring (73) one ends are articulated on the guiding piece (70), and the other end is articulated on the change-over terminal of brake block (50).
8. mower brake according to claim 7 is characterized in that: under the mower stopped status, described extension spring (73) is in first extended state, and lug (60) all leaves running clearance with the two ends of arc stopper slot (72); Under the mower duty, described extension spring (73) is in second extended state, and lug (60) is against arc stopper slot (72) one ends and by arc stopper slot (72) driven rotary, friction plate (51) does not contact with brake cover (4) outer wall; Under mower stopped braking state, extension spring (73) is in the 3rd extended state made friction plate (51) be close to brake cover (4) outer wall.
9. mower brake according to claim 7, it is characterized in that: described drive (7) top is provided with cover plate (8), described cover plate (8) is fixed on the guiding piece (70), cover plate (8) the outer rim baffle plate (80) that has been periphery, described brake block (50), a guiding piece (70) and extension spring (73) are housed in the space that baffle plate (80) surrounded.
10. mower brake according to claim 1 is characterized in that: described output shaft (3) upper end is rotatably connected on the support (2) by bearing assembly, and output shaft (3) end is provided with down play of jump ring (32) restriction output shaft (3); Mowing blade (9) is fixed tightly in output shaft (3) lower end by pressing plate (33) and locking nut (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100006964A CN102119607B (en) | 2011-01-04 | 2011-01-04 | Brake device for grass cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100006964A CN102119607B (en) | 2011-01-04 | 2011-01-04 | Brake device for grass cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102119607A true CN102119607A (en) | 2011-07-13 |
| CN102119607B CN102119607B (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100006964A Active CN102119607B (en) | 2011-01-04 | 2011-01-04 | Brake device for grass cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102119607B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102388724A (en) * | 2011-08-30 | 2012-03-28 | 浙江亚特电器有限公司 | Mower braking structure |
| CN103168567A (en) * | 2011-12-22 | 2013-06-26 | 浙江三锋实业股份有限公司 | Automatic braking device of gardening tool |
| CN104141712A (en) * | 2014-07-10 | 2014-11-12 | 浙江亚特电器有限公司 | Brake mechanism |
| CN106416628A (en) * | 2016-03-04 | 2017-02-22 | 浙江亚特电器有限公司 | Mowing machine |
| CN108174693A (en) * | 2017-12-28 | 2018-06-19 | 常州格力博有限公司 | Garden instrument |
| CN109362357A (en) * | 2018-10-12 | 2019-02-22 | 浙江亚特电器有限公司 | A kind of mower brake and grass trimmer |
| CN109756068A (en) * | 2018-12-11 | 2019-05-14 | 浙江亚特电器有限公司 | A kind of grass trimmer comprising switched reluctance machines |
| WO2021017324A1 (en) * | 2019-08-01 | 2021-02-04 | 天佑电器（苏州）有限公司 | Brake apparatus and lawn mower |
| CN112496537A (en) * | 2020-12-30 | 2021-03-16 | 珠海市科弥光电有限公司 | CO for MiniLED backlight production2Laser cutting equipment and cutting method |
| CN112793298A (en) * | 2021-02-01 | 2021-05-14 | 唐山嘉谊印刷机械有限公司 | Inertia prevention structure for foil releasing device of stamping machine |
| US20210400878A1 (en) * | 2018-11-09 | 2021-12-30 | Techtronic Cordless Gp | Modular Power Unit and Tool Using a Modular Power Unit |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013029292A1 (en) * | 2011-08-30 | 2013-03-07 | 嘉兴亚特园林机械研究所 | Mower brake structure |
| CN102388724B (en) * | 2011-08-30 | 2013-07-10 | 浙江亚特电器有限公司 | Mower braking structure |
| CN102388724A (en) * | 2011-08-30 | 2012-03-28 | 浙江亚特电器有限公司 | Mower braking structure |
| CN103168567A (en) * | 2011-12-22 | 2013-06-26 | 浙江三锋实业股份有限公司 | Automatic braking device of gardening tool |
| CN103168567B (en) * | 2011-12-22 | 2016-03-02 | 浙江三锋实业股份有限公司 | The dead-man's device of garden instrument |
| CN104141712A (en) * | 2014-07-10 | 2014-11-12 | 浙江亚特电器有限公司 | Brake mechanism |
| CN106416628A (en) * | 2016-03-04 | 2017-02-22 | 浙江亚特电器有限公司 | Mowing machine |
| CN108174693B (en) * | 2017-12-28 | 2024-03-12 | 格力博(江苏)股份有限公司 | Garden tool |
| CN108174693A (en) * | 2017-12-28 | 2018-06-19 | 常州格力博有限公司 | Garden instrument |
| CN109362357A (en) * | 2018-10-12 | 2019-02-22 | 浙江亚特电器有限公司 | A kind of mower brake and grass trimmer |
| CN109362357B (en) * | 2018-10-12 | 2024-02-13 | 浙江亚特电器股份有限公司 | Mower brake device and mower |
| US20210400878A1 (en) * | 2018-11-09 | 2021-12-30 | Techtronic Cordless Gp | Modular Power Unit and Tool Using a Modular Power Unit |
| CN109756068A (en) * | 2018-12-11 | 2019-05-14 | 浙江亚特电器有限公司 | A kind of grass trimmer comprising switched reluctance machines |
| CN109756068B (en) * | 2018-12-11 | 2024-06-04 | 浙江亚特电器股份有限公司 | Mower comprising switch reluctance motor |
| WO2021017324A1 (en) * | 2019-08-01 | 2021-02-04 | 天佑电器（苏州）有限公司 | Brake apparatus and lawn mower |
| CN112496537A (en) * | 2020-12-30 | 2021-03-16 | 珠海市科弥光电有限公司 | CO for MiniLED backlight production2Laser cutting equipment and cutting method |
| CN112793298A (en) * | 2021-02-01 | 2021-05-14 | 唐山嘉谊印刷机械有限公司 | Inertia prevention structure for foil releasing device of stamping machine |
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| CN102119607B (en) | 2012-11-07 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Mower brake Effective date of registration: 20210316 Granted publication date: 20121107 Pledgee: China Co. truction Bank Corp Jiaxing branch Pledgor: ZHEJIANG YAT ELECTRICAL APPLIANCE Co.,Ltd. Registration number: Y2021330000188 |
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Address after: No. 150 Wenlong Road, Yuxin Town, Nanhu District, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Yate Electric Appliance Co.,Ltd. Address before: Jiaxing City, Zhejiang province 314100 Nanhu District Yu Xin Zhen Industrial Zone North Water Road No. 1 Patentee before: ZHEJIANG YAT ELECTRICAL APPLIANCE Co.,Ltd. |
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