CN101785388B - Mower brake - Google Patents
Mower brake Download PDFInfo
- Publication number
- CN101785388B CN101785388B CN2009100282990A CN200910028299A CN101785388B CN 101785388 B CN101785388 B CN 101785388B CN 2009100282990 A CN2009100282990 A CN 2009100282990A CN 200910028299 A CN200910028299 A CN 200910028299A CN 101785388 B CN101785388 B CN 101785388B
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- China
- Prior art keywords
- output shaft
- brake
- brake disc
- mower
- axle sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000005096 rolling process Methods 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 241000883990 Flabellum Species 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The invention provides a mower brake which comprises a motor for providing driving power, a chassis supporting frame with a supporting function, as well as a brake disc, a brake mat and an output shaft which are accommodated in the chassis supporting frame. The brake disc is sleeved on the output shaft and is connected with the output shaft by a shaft sleeve; the side of the shaft sleeve is provided with an inclined groove; and a pin connected to the output shaft is accommodated in the inclined groove and can relatively slide along the inclined groove. By arranging a through hole in the output shaft and using a pin to connect the output shaft and the shaft sleeve, the invention realizes that the shaft sleeve can make axial shift along the output shaft and enable each element to have simple structure, and to be assembled conveniently and processed easily; since the connection between the output shaft and the shaft sleeve is realized only by the pin and the sides are connected by rolling elements in a clearance matching way without any direct contact, automatic axial movement of the brake disc along the output shaft in a working state can be avoided, thereby avoiding self braking.
Description
Technical field
The present invention relates to a kind of garden class power tool, especially a kind of mower, the brake gear on more particularly a kind of mower.
Background technology
Brake gear is one of important component of mower, is used to suppress the high speed rotating of blade and is halted state until it.The scheme that industry is comparatively ripe is to adopt the mode of brake disc and skid, and promptly brake disc produces along output shaft and moves axially, when itself and skid produce contact after, rely on the rotation of the frictional force inhibition brake disc between the two.
GB2324127 has disclosed a kind of brake gear of mower, it comprises motor that driving force is provided, is used to accommodate the brake gear chassis bracing frame of (comprising brake disc and skid), is arranged on the output shaft in the bracing frame of chassis, and brake disc is connected on the output shaft.Corresponding brake disc, inside top at the chassis bracing frame is provided with skid, connect by belt or gear between brake disc and the motor, the driving force that thereby motor can be provided is passed on the brake disc, and brake disc drives the output shaft rotation again, drives the blade rotation that is connected on the output shaft and carries out work.
On the side of brake disc, evenly be provided with some cam members, comprise along the skewed slot of output shaft axial direction and be housed in pin in the skewed slot, these pins are always pressed to pin the bottom of skewed slot under the effect of biasing spring, thereby keep separating of brake disc and skid.
When needs are done brake operation, because the motor stall of driving force is provided, cause reducing as the main brake disc rotating speed that drives, and simultaneously, output shaft still keeps original rotating speed under action of inertia, like this, speed discrepancy between the two makes brake disc produce reverse rotation with respect to output shaft, thereby the pin that is housed in the skewed slot has obtained movably space, further, pin will move to the top gradually from the bottom of skewed slot, and in moving process, pin also overcomes the active force of spring simultaneously.Because output shaft can't produce axially downward moving, and is relative, thereby produce the brake disc that is that axially moves up.When moving on the brake disc and with after skid contacts, the frictional force that produces between the two will suppress brake disc rotates until stopping, thereby realizes the brake purpose.
But the structure of brake disc includes inner and outer ring in this scheme, and between inner and outer ring, also be provided with skewed slot, pin and biasing spring, structure is comparatively complicated, and assembles up and inconvenient.
Therefore, prior art is necessary further improvement in fact.
Summary of the invention
The object of the present invention is to provide a kind of mower brake, it is simple in structure, and is easy to assembly and process more or less freely.
Another object of the present invention is to provide a kind of mower brake, can prevent that brake disc from use moving automatically, avoids the generation from the phenomenon of braking.
For achieving the above object, the invention provides a kind of mower brake, comprise the motor that driving force is provided, passive chassis bracing frame, be housed in brake disc, skid in the bracing frame of chassis, and output shaft, brake disc is set on the output shaft, links together by axle sleeve between brake disc and the output shaft, is formed with skewed slot on the side of axle sleeve, a pin that is connected on the output shaft is housed in the skewed slot, and can slide relatively along skewed slot.
As the improvement to such scheme, what run through on the described output shaft is provided with perforation, and described pin passes perforation.
Described skewed slot has a low order position and a upper level position along horizontal plane, pin can slide between low order position and upper level position, when pin is positioned at the low order position, described mower is in braking state, described brake disc and skid contact, and when pin was positioned at upper level position, described mower was in running order, and described brake disc separates with described skid.
Be provided with rolling element between described axle sleeve and the output shaft, make axle sleeve and output shaft form the gap and be connected.
Described rolling element is steel ball or needle roller.
Two ends up and down at axle sleeve are formed with cannelure or groove respectively, and described steel ball is housed in cannelure or the groove, and fixing by packing ring and back-up ring restriction.
The side of described axle sleeve is formed with fin, and corresponding fin is provided with groove on the described brake disc, and described fin can be housed in the groove.
Described brake disc comprises end face portion and side surface part, and is formed with flange on the described end face portion, and when mower was in braking state, described end face portion produced with skid and contacts.
Described brake disc also comprises collar and flabellum portion, and described groove is positioned on the collar, and extends along axial direction.
Described brake gear also comprises belt, and its motor drive shaft and output shaft with motor is a fulcrum, is centered around on the roller and brake disc that is set on the motor drive shaft.
Adopt among the present invention perforation is set on output shaft, and connected output shaft and axle sleeve, realized that axle sleeve can produce displacement on the axial direction along output shaft, makes that each component structure is simple, easy to assembly and handling ease by a pin.
In addition, owing to only connect between output shaft and the axle sleeve by pin, there is not directly contact between its side, but rely on rolling element to link together in the mode that the gap connects, thereby avoided in working order down, brake disc produces axially to go up automatically along output shaft and moves, and prevents the generation from the phenomenon of braking.
Description of drawings
Fig. 1 is the stereogram of mower brake in the preferred embodiments of the present invention.
Fig. 2 is the explosive view of mower brake.
Fig. 3 is the output shaft of mower brake and the stereogram of brake disc.
Fig. 4 is the output shaft of mower brake among Fig. 3 and the C-C profile of brake disc.
Fig. 5 a is the rotation principle schematic of output shaft under in working order.
Fig. 5 b is the rotation principle schematic of output shaft under braking state.
Fig. 6 a is that output shaft is following in working order, and axle sleeve is with respect to the position view of output shaft.
Fig. 6 b be output shaft under braking state, axle sleeve is with respect to the position view of output shaft.
Related elements reference numeral in the diagram is as follows:
1, motor 2, chassis bracing frame 3, brake disc
4, skid 5, belt 6, output shaft
7, axle sleeve 11, motor drive shaft 12, roller
21, top board 22, sidewall 23, circular hole
24, deep-slotted chip breaker 25, arc 26, spring
31, end face portion 32, side surface part 33, flange
34, collar 35, flabellum portion 36, groove
61, bearing 62, perforation 63, pin
71, fin 72, skewed slot 73, cannelure
74, steel ball 75, packing ring 76, back-up ring
Embodiment
The present invention is described in further detail below in conjunction with drawings and the specific embodiments.
See also Fig. 1, a kind of mower brake is used to suppress the rotating speed of output shaft and stops operating until it.This mower brake setting is installed in the shell body (figure does not show) of mower, comprise the motor 1 that driving force is provided, passive chassis bracing frame 2, the brake disc 3 that is housed in chassis bracing frame 2 inside and skid 4 (see figure 2)s, be used to transmit the rotary driving force that is produced by motor 1 makes brake disc 3 generation rotations to brake disc 3 belt 5, and output shaft 6, brake disc 3 is set on the output shaft 6 and by brake disc 3 and drives output shaft 6 rotations.
See also Fig. 2, output shaft 6 is arranged on the chassis bracing frame 2 by the bearing 61 that connects on the one end, and is connected with load on the other end, is specially fan and blade (figure does not show).After output shaft 6 was by brake disc 3 driven in rotation, fan and blade be together rotation thereupon, thereby can make mower in running order.It should be noted that, brake disc 3 and the skid 4 of this moment are separated from one another, if the user need make mower be in braking state, only brake disc 3 and skid 4 need be contacted and produce bigger inhibition frictional force, just mower can be carried out brake operation.
Belt 5 is a fulcrum with motor drive shaft 11 and output shaft 6, be centered around on roller 12 and the brake disc 3, thereby when motor 1 provided driving force, when promptly motor drive shaft 11 drove roller 12 generation rotations, by the moment of torsion transmission of belt 5, brake disc 3 also produces rotation thereupon.
The end face portion 31 of corresponding brake disc 3 on the top board 21 of chassis bracing frame 2, relative is provided with two deep-slotted chip breakers 24, is respectively applied for and accommodates arc 25, and skid 4 is arranged on the arc 25.And, in this deep-slotted chip breaker 24, also being provided with spring 26, spring 26 applies biasing force always arc 25 is pressed to brake disc 3.In use,, contact, can produce the rotation of bigger frictional force inhibition brake disc 3, thereby reach the brake purpose if the end face portion 31 of brake disc 3 produces with skid 4 when brake disc 3 produces when moving axially along output shaft 6.
See also Fig. 3, link together by an axle sleeve 7 between output shaft 6 and the brake disc 3.On the outer surface of axle sleeve 7, symmetry be provided with two fins 71, and fin 71 extends along axial direction.The groove 36 of the collar that is arranged on brake disc 3 34 of corresponding these two fins 71, after fin 71 was housed in the groove 36, brake disc 3 and axle sleeve 7 closely connected and are one.On the side of axle sleeve 7, and the position between two fins 71, offer a skewed slot 72 respectively, simultaneously, on output shaft 6, be provided with 62, one pins 63 of a perforation and pass this perforation 62, and the two ends of pin 63 are housed in respectively in two skewed slots 72.Be as the criterion with horizontal plane, skewed slot 72 has a low order position 721 and a upper level position 722, and pin 63 can slide between low order position 721 and upper level position 722, moves axially with respect to output shaft 6 generations thereby drive axle sleeve 7.Connect as one because of axle sleeve 7 and brake disc 3 again, thereby brake disc 3 also can produce with respect to output shaft 6 and move axially.
Need to prove, as preferred embodiment, axle sleeve 7 is integral structures, certainly, axle sleeve 7 can also adopt up and down two-part erection method to constitute, and promptly axle sleeve 7 comprises Upper shaft sleeve and Lower shaft sleeve, has promptly provided such diagram in Fig. 3, Upper shaft sleeve becomes a complete axle sleeve with the Lower shaft sleeve assembling combination, its effect of reaching is consistent with the axle sleeve 7 of integral structure.
Please return and consult Fig. 2, annexation between output shaft 6, axle sleeve 7 and the brake disc 3 is: at the collar 34 of brake disc 3, axle sleeve 7 is between output shaft 6 and brake disc 3, adopt being connected of fin 71 and groove 36 between its bottom bracket axle 7 and the brake disc 3, and adopt the gap ways of connecting between axle sleeve 7 and the output shaft 6, promptly directly do not contact between the two.Two ends up and down at axle sleeve 7 are respectively arranged with cannelure 73, and contain steel ball 74 in cannelure 73, and steel ball 74 is fixed in the cannelure 74 by 76 restrictions of packing ring 75 and back-up ring, and the generation gap is connected between axle sleeve 7 and the output shaft 6 thereby make.Certainly, the steel ball 74 here can also adopt other rolling elements as needle roller etc.
See also Fig. 4, why adopt the gap to be connected between axle sleeve 7 and output shaft 6, purpose is to reduce the axial friction between axle sleeve 7 and the output shaft 6.Because be arranged with belt 5 on the side surface part 32 of brake disc 3, in the course of the work, belt 5 can further brake disc 3 towards motor drive shaft 11, thereby causes brake disc 3 to produce small moving with respect to output shaft 6, is as the criterion with direction in the diagram.The right side part of the axle sleeve 7 that is connected with brake disc 3 will produce with output shaft 6 and closely contact, and the left part of axle sleeve 7 will and output shaft 6 between the small spacing of generation.Therefore, because of tight contact can produce the rotating speed that the frictional force effect influences axle sleeve 7 and output shaft 6, after producing speed discrepancy because of the frictional force effect between the two, axle sleeve 7 will upwards move at the effect lower shaft of frictional force between the right side of axle sleeve 7 part and output shaft 6.State when moving past journey as brake on concrete is seen below and is stated.
And in the present embodiment, effect by cannelure 73 and steel ball 74, make between axle sleeve 7 and the output shaft 6 axially on frictional force level off to zero, and further make the effect of the power that axle sleeve 7 moves on losing axially, thereby cause axle sleeve 7 to move axially, also cause the brake disc 3 of fixedlying connected to move axially with axle sleeve 7, avoided brake disc 3 automatically on move the brake phenomenon certainly that is produced.
See also Fig. 5 a, belt 5 drives brake disc 3 and produces turning clockwise of A direction as shown, brake disc 3 drives axle sleeve 7 again by fin 71 and turns clockwise, effect by the pin 63 between axle sleeve 7 and the output shaft 6, output shaft 6 also produces and turns clockwise, thereby further drives fan and blade rotary work.See also Fig. 6 a, at this moment, because it is main actuator that brake disc 3 drives axle sleeve 7, and output shaft 6 is a driven member, therefore, the rotation of output shaft 6 starts than axle sleeve 7 a little later, causes the low order end of pin 63 in moving to as shown along skewed slot 72, and promptly pin 63 is arranged in the upper level position 722 of skewed slot 72.Owing to pin 63 is an one with output shaft 6, can not produce to move axially, therefore relative, produce axially move down be axle sleeve 7 and the brake disc 3 that is connected with axle sleeve 7, like this, brake disc 3 is just separated with the skid 4 of chassis bracing frame 2 inside, normally rotary work.
See also Fig. 5 b, belt 5 reduces rotating speed because of the stall of motor drive shaft 11, but simultaneously, output shaft 6 also is under the original rotating speed of inertia, so just make the rotating speed of brake disc 3 less than the rotating speed of output shaft 6, relative, brake disc 3 produces being rotated counterclockwise of B direction as shown with respect to output shaft 6, drives axle sleeve 7 again and is rotated counterclockwise.See also Fig. 6 b, at this moment, because output shaft 6 still keeps original rotating speed under effect of inertia, it changes to main actuator, and brake disc 3 drive axle sleeves 7 change to driven member because of rotating speed reduces, and therefore, the rotation of output shaft 6 starts than axle sleeve 7 earlier, cause the high order end of pin 63 in moving to as shown along skewed slot 72, promptly pin 63 is arranged in the low order position 721 of skewed slot 72.Because pin 63 is an one with output shaft 6, can not produce axially and move down, therefore relative, produce axially move up be axle sleeve 7 and the brake disc 3 that is connected with axle sleeve 7, like this, brake disc 3 just moves closer to and finally contacts with the skid 4 of chassis bracing frame 2 inside, thereby plays braking action.
To sum up, because among the present invention, adopt clearance-type to be connected between axle sleeve 7 and the output shaft 6, promptly only connect by steel ball, so in the axial direction, cause the stiction between the two to level off to zero, make axle sleeve 7 apply active force to output shaft 6, like this, axle sleeve 7 can't produce and move axially, also just can not drive brake disc 3 and produce and do not move axially, thereby avoid the brake phenomenon certainly that produced between brake disc 3 and the skid 4 preferably.
Brake gear disclosed in this invention be with mower as specific embodiment, but be not just to be confined to be applied on the mower.In other multiple graden machines, can use such brake gear equally.
Claims (10)
1. mower brake, comprise the motor (1) that driving force is provided, passive chassis bracing frame (2), be housed in brake disc (3), skid (4) in the chassis bracing frame (2), and output shaft (6), brake disc (3) is set on the output shaft (6), it is characterized in that: link together by axle sleeve (7) between brake disc (3) and the output shaft (6), be formed with skewed slot (72) on the side of axle sleeve (7), a pin (63) that is connected on the output shaft (6) is housed in the skewed slot (72), and can slide relatively along skewed slot (72).
2. mower brake as claimed in claim 1 is characterized in that: what run through on the described output shaft (6) is provided with perforation (62), and described pin (63) passes perforation (62).
3. mower brake as claimed in claim 1, it is characterized in that: described skewed slot (72) has a low order position (721) and a upper level position (722) along horizontal plane, pin (63) can slide between low order position (721) and upper level position (722), when pin (63) is positioned at low order position (721), described mower is in braking state, described brake disc (3) and skid (4) contact, and when pin (63) when being positioned at upper level position, described mower is in running order, and described brake disc (3) separates with described skid (4).
4. mower brake as claimed in claim 1 is characterized in that: be provided with rolling element between described axle sleeve (7) and the output shaft (6), make axle sleeve (7) and output shaft (6) form the gap and be connected.
5. mower brake as claimed in claim 4 is characterized in that: described rolling element is steel ball (74) or needle roller.
6. mower brake as claimed in claim 5, it is characterized in that: be formed with cannelure (73) or groove respectively at the two ends up and down of axle sleeve (7), described steel ball (74) is housed in cannelure (73) or the groove, and fixing by packing ring (75) and back-up ring (76) restriction.
7. mower brake as claimed in claim 1, it is characterized in that: the side of described axle sleeve (7) is formed with fin (71), described brake disc (3) is gone up corresponding fin (71) and is provided with groove (36), and described fin (71) can be housed in the groove (36).
8. mower brake as claimed in claim 7, it is characterized in that: described brake disc (3) comprises end face portion (31) and side surface part (32), and be formed with flange (33) on the described end face portion (31), when mower was in braking state, described end face portion (31) produced with skid (4) and contacts.
9. mower brake as claimed in claim 8 is characterized in that: described brake disc (3) also comprises collar (34) and flabellum portion (35), and described groove (36) is positioned on the collar (34), and extends along axial direction.
10. mower brake as claimed in claim 1, it is characterized in that: described brake gear also comprises belt (5), its motor drive shaft with motor (1) (11) and output shaft (6) are fulcrum, are centered around on the roller (12) and brake disc (3) that is set on the motor drive shaft (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100282990A CN101785388B (en) | 2009-01-23 | 2009-01-23 | Mower brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100282990A CN101785388B (en) | 2009-01-23 | 2009-01-23 | Mower brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101785388A CN101785388A (en) | 2010-07-28 |
| CN101785388B true CN101785388B (en) | 2011-12-07 |
Family
ID=42528892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100282990A Expired - Fee Related CN101785388B (en) | 2009-01-23 | 2009-01-23 | Mower brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101785388B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102282975B (en) * | 2011-06-21 | 2013-06-12 | 浙江亚特电器有限公司 | Braking structure of lawn mower |
| CN103168568B (en) * | 2011-12-22 | 2015-10-07 | 浙江三锋实业股份有限公司 | Dead-man's device |
| CN109305341A (en) * | 2018-09-29 | 2019-02-05 | 贵州新安航空机械有限责任公司 | A kind of self-locking operating mechanism of parking brake |
| CN110622679B (en) * | 2019-10-15 | 2022-04-22 | 广西润源园林建设有限公司 | Garden machine prevents twining careless device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3994376A (en) * | 1973-04-25 | 1976-11-30 | International Harvester Company | Self actuating mechanism for braking a driven member upon discontinuating of drive thereto |
| GB2324127A (en) * | 1997-04-11 | 1998-10-14 | Electrolux Outdoor Prod Ltd | Brake assembly for a powered rotary tool e.g. a lawnmower or a hedge trimmer |
| CN2754327Y (en) * | 2004-11-30 | 2006-02-01 | 重庆宗申技术开发研究有限公司 | Brake of lawn equipment |
| CN2904621Y (en) * | 2006-01-09 | 2007-05-30 | 苏州金莱克家用电器有限公司 | Lawn mower brake |
| CN201352898Y (en) * | 2009-02-05 | 2009-12-02 | 苏州宝时得电动工具有限公司 | Grass cutter braking device |
-
2009
- 2009-01-23 CN CN2009100282990A patent/CN101785388B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3994376A (en) * | 1973-04-25 | 1976-11-30 | International Harvester Company | Self actuating mechanism for braking a driven member upon discontinuating of drive thereto |
| GB2324127A (en) * | 1997-04-11 | 1998-10-14 | Electrolux Outdoor Prod Ltd | Brake assembly for a powered rotary tool e.g. a lawnmower or a hedge trimmer |
| CN2754327Y (en) * | 2004-11-30 | 2006-02-01 | 重庆宗申技术开发研究有限公司 | Brake of lawn equipment |
| CN2904621Y (en) * | 2006-01-09 | 2007-05-30 | 苏州金莱克家用电器有限公司 | Lawn mower brake |
| CN201352898Y (en) * | 2009-02-05 | 2009-12-02 | 苏州宝时得电动工具有限公司 | Grass cutter braking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101785388A (en) | 2010-07-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: POSITEC MACHINERY (CHINA) Co.,Ltd. Assignor: POSITEC POWER TOOLS (SUZHOU) Co.,Ltd. Contract record no.: 2012320010029 Denomination of invention: Mower brake Granted publication date: 20111207 License type: Exclusive License Open date: 20100728 Record date: 20120307 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 |