CN100564925C - Braking device for garden tool - Google Patents
Braking device for garden tool Download PDFInfo
- Publication number
- CN100564925C CN100564925C CNB200810123530XA CN200810123530A CN100564925C CN 100564925 C CN100564925 C CN 100564925C CN B200810123530X A CNB200810123530X A CN B200810123530XA CN 200810123530 A CN200810123530 A CN 200810123530A CN 100564925 C CN100564925 C CN 100564925C
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- voussoir
- follower
- guide wheel
- external tooth
- tooth
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Abstract
A kind of braking device for garden tool, the bottom surface of described follower is provided with the circular groove with the concentricity line of axis hole, the inwall of circular groove is provided with at least 2 internal tooths, each internal tooth is that the short voussoir of internal tooth on inclined-plane and the long voussoir of internal tooth that lower surface is the inclined-plane are formed by upper surface, and the end of the long voussoir of internal tooth is in adjacent internal tooth and lacks above the voussoir top; Be fixed with guide wheel on the described working shaft, the outer peripheral surface of guide wheel is provided with the external tooth corresponding with the internal tooth of follower, the external tooth of guide wheel is that the short voussoir of external tooth on inclined-plane and the long voussoir of external tooth that upper surface is the inclined-plane are formed by lower surface, the end of the long voussoir of external tooth is in below, the short voussoir of adjacent external tooth top, and the intersection of short voussoir of external tooth and the long voussoir of external tooth has step; The short voussoir of internal tooth on the described follower respectively is inserted into the following side space of the short voussoir of corresponding guide wheel external tooth and touches step on the guide wheel.Braking of the present invention is reliable, easy to process and reduced cost.
Description
Technical field
The present invention relates to braking device for garden tool.
Background technique
Some electric tool is required that behind supply disconnecton rotor stops operating in the short time, and revolving part stops operating simultaneously.Mowing machine for example just requires that 3～5 seconds inner blades must stop operating behind supply disconnecton.China Patent No. is 200510038310.3 the disclosed inertial rotation axial braking device for gardening tool of patent of invention specification, form by the working shaft that is used for mounting cutter, follower, electric machine support and brake slipper, the working shaft and the electric machine support of mounting cutter are rotationally connected, brake slipper is located on the electric machine support, working shaft is threaded with follower, on the exterior edge face of follower, be provided with projection, on working shaft, be fixed with dialing part and be arranged on the position that the rotational plane that can make dialing part is positioned at the altitude range of projection.The present invention is after power source is cut off, working shaft and be installed on revolving part (cutter etc.) on the working shaft and follower between the inertia that exists poor, working shaft and follower are relatively rotated, follower is moved axially, touch and act on the brake slipper that is installed on the electric machine support until the follower inner side end.The working shaft of foregoing invention patent braking device is threaded with follower, and working shaft needs threading, and follower needs machining internal thread, and must be metal on the material, so processing bothers, cost is higher relatively.
Summary of the invention
The objective of the invention is to propose that a kind of processing is simple, cost is low and the reliable braking device for garden tool of braking.
For achieving the above object, the present invention takes following technological scheme: the present invention includes the working shaft, support, brake assemblies and the follower that are used to install revolving part, working shaft and support are rotationally connected, and brake assemblies is located on the support, and described working shaft and follower are slidingly connected; The bottom surface of described follower is provided with the circular groove with the concentricity line of axis hole, the inwall of circular groove is provided with at least 2 internal tooths, each internal tooth is that the short voussoir of internal tooth on inclined-plane and the long voussoir of internal tooth that lower surface is the inclined-plane are formed by upper surface, and the end of the long voussoir of internal tooth is in adjacent internal tooth and lacks above the voussoir top; Be fixed with guide wheel on the described working shaft, the outer peripheral surface of guide wheel is provided with the external tooth corresponding with the internal tooth of follower, the external tooth of guide wheel is that the short voussoir of external tooth on inclined-plane and the long voussoir of external tooth that upper surface is the inclined-plane are formed by lower surface, the end of the long voussoir of external tooth is in below, the short voussoir of adjacent external tooth top, and the intersection of short voussoir of external tooth and the long voussoir of external tooth has step; The short voussoir of internal tooth on the described follower respectively is inserted into the following side space of the short voussoir of corresponding guide wheel external tooth and touches step on the guide wheel.
Internal tooth on the circular groove inwall of described follower is 3.
Drive fit has axle sleeve in the axis hole of follower.
Described axle sleeve is the iron-based powder die castings.
Described working shaft, follower and guide wheel are working of plastics.
In the described guide wheel and at the other metal insert that is provided with of axis hole.
Described brake assemblies by key seat, rationed marketing, and the untie-sell that is dynamically connected of rationed marketing, the friction block that is in the spring between rationed marketing and the untie-sell and is fixed on the untie-sell bottom form, key seat is connected on the support, rationed marketing, untie-sell and spring are located in the through hole of key seat, and friction block exposes the through hole of key seat.
The present invention is inserted into the following side space of the short voussoir of corresponding guide wheel external tooth and touches step by the short voussoir of each internal tooth on the follower and drives the guide wheel rotation, drive the working shaft rotation by guide wheel, when producing rotating speed inertia difference between follower and the guide wheel, follower is braking rapidly under the effect of brake assemblies, thereby guide wheel is braked rapidly, so braking is reliable.The structure of follower of the present invention and guide wheel all is fit to adopt moulding, the structure of same working shaft also is fit to adopt moulding, owing to be slidingly connected between working shaft and the follower, save working shaft and follower screw thread separately and processed, not only bring convenience but also reduced cost to processing.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the present invention is further detailed explanation, wherein
Fig. 1 is a configuration diagram of the present invention;
Fig. 2 is the follower diagrammatic sketch;
Fig. 3 is the diagrammatic sketch that the follower inclined end face makes progress;
Fig. 4 is the follower sectional view;
Fig. 5 is the guide wheel diagrammatic sketch;
Fig. 6 is another kind of follower diagrammatic sketch.
Embodiment
Embodiment
Embodiment shown in the accompanying drawing 1-5 comprises plastics working shaft 1, support 2, brake assemblies 3, plastics follower 4 and the plastics guide wheel 6 that is used to install revolving part.Working shaft 1 is rotationally connected with support 2 by upper bearing (metal) 10, lower bearing 11, and brake assemblies 3 is located on the support 2.Described working shaft 1 is slidingly connected with follower 4, has at interval between the shaft shoulder 1-1 of the working shaft 1 of the upper surface of follower 4 and its top, makes follower 4 to move axially.Respectively be provided with shaft block ring 12 on the working shaft 1 and on the top of upper bearing (metal) 10 and the bottom of guide wheel 6.
Described brake assemblies 3 by key seat 3-1, rationed marketing 3-2, and the untie-sell 3-4 that is dynamically connected of rationed marketing 3-2, the friction block 3-5 that is in the spring 3-3 between rationed marketing 3-2 and the untie-sell 3-4 and is fixed on untie-sell 3-4 bottom form, key seat 3-1 is connected on the support 2, key seat 3-1 can with support 2 one, rationed marketing 3-2, untie-sell 3-4 and spring 3-3 are located in the through hole of key seat 3-1, and friction block 3-5 exposes the through hole of key seat 3-1.
See Fig. 1～4, the bottom surface of described follower 4 is provided with the circular groove with the concentricity line of axis hole, the inwall of circular groove is provided with 3 internal tooths 5, each internal tooth 5 is that the short voussoir 5-1 of internal tooth on inclined-plane and the long voussoir 5-2 of internal tooth that lower surface 5-21 is the inclined-plane form by upper surface 5-11, the end of the long voussoir 5-2 of internal tooth be in top, the short voussoir 5-1 of adjacent internal tooth top and and adjacent internal tooth weak point voussoir top between have upward interval h.For preventing the wearing and tearing of follower 4 axis holes, drive fit has axle sleeve 8 in the axis hole of described follower 4, and described axle sleeve 8 is iron-based powder die castingss, and axle sleeve 8 can play the effect of oil-containing bearing shell.
See Fig. 1,5, described guide wheel 6 is fixed on the working shaft 1, the outer peripheral surface of guide wheel 6 is provided with 3 external tooths 7 corresponding with the internal tooth 5 of follower 4, the external tooth 7 of guide wheel 6 is that the short voussoir 7-1 of external tooth on inclined-plane and the long voussoir 7-2 of external tooth that upper surface 7-21 is the inclined-plane form by lower surface 7-11, the end of the long voussoir 7-2 of external tooth be in the short voussoir 7-1 top downside of adjacent external tooth and and adjacent external tooth weak point voussoir 7-1 top between have under interval g.The intersection of short voussoir 7-1 of external tooth and the long voussoir 7-2 of external tooth has step 7-3.For strengthening the intensity of guide wheel 6, in guide wheel 6 and at the other metal insert 9 that is provided with of axis hole.
The short voussoir 5-1 of internal tooth on the described follower 4 respectively is inserted into the following side space of the short voussoir 7-1 of corresponding guide wheel external tooth and touches step 7-3 by the following interval g on the guide wheel 6.The short voussoir 7-1 of internal tooth that upward interval h on the follower 4 should be able to hold guide wheel 6 inserts.
See Fig. 6, can on the lower surface 5-21 of the long voussoir 5-2 of follower internal tooth, be provided with groove 5-21-1, with the weight that alleviates follower and the area of reducing friction.
Under the working shaft operating condition, 4 rotations of driven by motor follower, the short voussoir 5-1 of the internal tooth of follower 4 promotes the guide wheel rotation by contact with step 7-3 on the guide wheel, and the upper surface 5-11 of the short voussoir 5-1 of each follower internal tooth this moment is identical with the lower surface 7-11 of corresponding guide wheel external tooth weak point voussoir 7-1.Guide wheel drives the working shaft rotation, and this moment, follower 4 was in the nextly, had the gap between the friction block 3-5 of brake assemblies 3 and the end face of follower 4.When the motor stall, it is poor to produce rotating speed inertia between follower 4 and the working shaft 1, the lower surface 5-21 of the long voussoir 5-2 of the internal tooth of follower 4 moves along the upper surface 7-21 of the long voussoir of guide wheel, follower 4 relative working shafts 1 move up, withstand the friction block 3-5 face of brake assemblies 3 when follower 4 end faces, because the effect of the spring 3-3 of brake assemblies 3, untie-sell 3-4 is being with friction block 3-5 to be adjacent to follower, follower 4 is braked rapidly, and this moment since the lower surface 5-21 of the long voussoir 5-2 of follower 4 internal tooths contacting with the upper surface 7-21 of the long voussoir of guide wheel external tooth, guide wheel is subjected to resistance and brakes rapidly, working shaft 1 stall.When electric motor starting, follower begins to rotate, and relatively rotates with the working shaft that is in static inertial states and move down, and makes follower break away from the brake assemblies friction block, and instrument is in running order.
Claims (7)
1, a kind of braking device for garden tool, comprise the working shaft (1), support (2), brake assemblies (3) and the follower (4) that are used to install revolving part, working shaft (1) is rotationally connected with support (2), brake assemblies (3) is located on the support (2), it is characterized in that: described working shaft (1) is slidingly connected with follower (4); The bottom surface of described follower (4) is provided with the circular groove with the concentricity line of axis hole, the inwall of circular groove is provided with at least 2 internal tooths (5), each internal tooth (5) is that the short voussoir (5-1) of internal tooth on inclined-plane and the long voussoir of internal tooth (5-2) that lower surface (5-21) is the inclined-plane are formed by upper surface (5-11), and the end of the long voussoir of internal tooth (5-2) is in adjacent internal tooth and lacks above voussoir (5-1) top; Be fixed with guide wheel (6) on the described working shaft (1), the outer peripheral surface of guide wheel (6) is provided with the external tooth (7) corresponding with the internal tooth (5) of follower (4), the external tooth (7) of guide wheel (6) is that the short voussoir (7-1) of external tooth on inclined-plane and the long voussoir of external tooth (7-2) that upper surface (7-21) is the inclined-plane are formed by lower surface (7-11), the end of the long voussoir of external tooth (7-2) is in below, the short voussoir (7-1) of adjacent external tooth top, and the short voussoir of external tooth (7-1) has step (7-3) with the intersection of the long voussoir of external tooth (7-2); The short voussoir of internal tooth on the described follower (4) (5-1) respectively is inserted into the following side space of the short voussoir of corresponding guide wheel external tooth (7-1) and touches step (7-3) on the guide wheel (6).
2, braking device for garden tool according to claim 1 is characterized in that: the internal tooth (5) on the circular groove inwall of described follower (4) is 3.
3, braking device for garden tool according to claim 1 and 2 is characterized in that: drive fit has axle sleeve (8) in the axis hole of follower (4).
4, braking device for garden tool according to claim 3 is characterized in that: described axle sleeve (8) is the iron-based powder die castings.
5, braking device for garden tool according to claim 4 is characterized in that: described working shaft (1), follower (4) and guide wheel (6) are working of plastics.
6, braking device for garden tool according to claim 5 is characterized in that: in the described guide wheel (6) and at the other metal insert (9) that is provided with of axis hole.
7, braking device for garden tool according to claim 1 and 2, it is characterized in that: described brake assemblies (3) by key seat (3-1), rationed marketing (3-2), and the untie-sell (3-4) that is dynamically connected of rationed marketing (3-2), the friction block (3-5) that is in the spring (3-3) between rationed marketing (3-2) and the untie-sell (3-4) and is fixed on untie-sell (3-4) bottom form, key seat (3-1) is connected on the support (2), rationed marketing (3-2), untie-sell (3-4) and spring (3-3) are located in the through hole of key seat (3-1), and friction block (3-5) exposes the through hole of key seat (3-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200810123530XA CN100564925C (en) | 2008-07-07 | 2008-07-07 | Braking device for garden tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200810123530XA CN100564925C (en) | 2008-07-07 | 2008-07-07 | Braking device for garden tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101319696A CN101319696A (en) | 2008-12-10 |
| CN100564925C true CN100564925C (en) | 2009-12-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200810123530XA Expired - Fee Related CN100564925C (en) | 2008-07-07 | 2008-07-07 | Braking device for garden tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100564925C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103168568B (en) * | 2011-12-22 | 2015-10-07 | 浙江三锋实业股份有限公司 | Dead-man's device |
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2008
- 2008-07-07 CN CNB200810123530XA patent/CN100564925C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101319696A (en) | 2008-12-10 |
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Granted publication date: 20091202 Termination date: 20200707 |