CN204762246U - Electric tool dead mans device - Google Patents
Electric tool dead mans device Download PDFInfo
- Publication number
- CN204762246U CN204762246U CN201520144422.6U CN201520144422U CN204762246U CN 204762246 U CN204762246 U CN 204762246U CN 201520144422 U CN201520144422 U CN 201520144422U CN 204762246 U CN204762246 U CN 204762246U
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- CN
- China
- Prior art keywords
- belt pulley
- brake block
- big
- friction ring
- output shaft
- 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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Abstract
The utility model relates to an electric tool dead mans device, including motor, clamshell, output shaft and big, belt lace wheel and belt, motor and output shaft are fixed a position respectively on the clamshell, and the belt lace wheel is fixed on the motor shaft, and big belt pulley is fixed on the output shaft, and big, belt lace wheel forms the transmission by the belt and connects, the clamshell stretches out to big belt pulley one side has the friction ring, corresponds the brake block that is equipped with the centrifugation action on the big belt pulley circumference, with the help of installing the spring between brake block and big belt pulley, presses the brake block to the friction ring, characterized by: having seted up the caulking groove on the friction ring circumference, having inlayed in the caulking groove and be equipped with the clutch blocks, this clutch blocks border is in same circular arc with the friction ring. The utility model discloses on the friction ring circumference, inlay and be equipped with the clutch blocks that coefficient of friction is bigger, with the help of this clutch blocks and friction ring, synergism, both the friction of multiplicable and brake block reached prompt braking action, also can improve the wear resistance and friction efficiency, increase of service life of friction ring.
Description
Technical field:
The utility model belongs to electric tool Braking mode field, particularly a kind of electric tool dead-man's device.
Background technology:
The electric tool used in existing gardens, as mower is all configured with dead-man's device, to shorten the time limit of shutting down rear rotating blade and continuing to rotate, both for safety, had also protected sharp cutter.As CN103168567A, a kind of dead-man's device of garden instrument is disclosed, comprise the fixed head being provided with motor and output shaft, output shaft is fixed with large belt wheel, the lower end of motor shaft is stretched out fixed head and is fixed with small pulley, large belt wheel and small pulley are in transmission connection by driving-belt, fixed head is fixed with and is enclosed within output shaft and the drag ring stretched in large belt wheel, the inner chamber of large belt wheel is provided with spring and brake block, brake block one end is flexibly connected with large belt wheel, the other end is supported with spring and is coordinated, the inner chamber of described large belt wheel is also provided with backstop inclined-plane, described brake block is provided with a projection, described projection can be slided on described backstop inclined-plane.This invention reaches the object of braking by brake block and drag ring.This is also way comparatively general at present, large belt wheel High Rotation Speed is followed by brake block, open under centrifugal action, depart from the friction with drag ring, and when after motor dead electricity, large belt wheel reduction of speed, centrifugal force reduces, brake block is embraced again on drag ring under spring force, forms the object of Braking mode.Due to the easy loss of drag ring, cause braking time long.
Summary of the invention:
The purpose of this utility model is the brake pad a kind of drag ring of design being embedded with large coefficient of friction, increases the electric tool dead-man's device of frictional force.
Technical solutions of the utility model are achieved in that a kind of electric tool dead-man's device, comprise motor, clamshell, output shaft and large and small belt pulley and belt; Described motor and output shaft are positioned on clamshell respectively, and small belt pulley is fixed on motor shaft, and big belt pulley is fixed on output shaft, and large and small belt pulley is formed by belt and is in transmission connection; Clamshell is extended with drag ring to big belt pulley side, and big belt pulley is the corresponding brake block being provided with centrifugal action circumferentially, by the spring be arranged between brake block and big belt pulley, brake block is pressed to drag ring; It is characterized in that: drag ring circumferentially offers caulking groove, in caulking groove, be embedded with brake pad, this brake pad edge and drag ring are in same circular arc.
Described drag ring is circumferentially evenly distributed with three caulking grooves, and is embedded with brake pad respectively.
The utility model at drag ring circumferentially, is embedded with the brake pad that coefficient of friction is larger, by this brake pad and drag ring, synergy, both can increase the friction with brake block, reach fast braking, also can improve anti-wear performance and the friction efficiency of drag ring, increase the service life.
Accompanying drawing illustrates:
Below in conjunction with concrete legend, the utility model is described further:
Fig. 1 mower brake schematic perspective view
Fig. 2 mower brake perspective exploded view
Wherein
1-motor, 2-clamshell, 21-drag ring, 22-caulking groove
3-output shaft, 4-big belt pulley, 5-small belt pulley, 6-belt
7-blade, 8-brake block, 81-spring, 9-brake pad
Embodiment:
See figures.1.and.2, a kind of electric tool dead-man's device, this example is the dead-man's device of mower, comprises motor 1, clamshell 2, output shaft 3 and large and small belt pulley 4,5 and belt 6; Motor 1 and output shaft 3 are positioned on clamshell 2 respectively, small belt pulley 5 is fixed on motor shaft, big belt pulley 4 is fixed on output shaft 3, large and small belt pulley 4,5 is formed by belt 6 and is in transmission connection, also be that the speedy carding process of motor 1 is through large and small belt pulley 4,5 reduction of speed, be with moving plate cutter 7 High Rotation Speed again, realize the object to cut the grass on a lawn etc.; Clamshell 2 is extended with drag ring 21 to big belt pulley 4 side, big belt pulley 4 is the corresponding brake block 8 being provided with centrifugal action circumferentially, by the spring 81 be arranged between brake block 8 and big belt pulley 4, brake block 8 is pressed to drag ring 21, realize fast braking, namely after mower quits work, realize braking fast, both protect personal safety, also protect blade 7; In order to increase the frictional force of braking, it circumferentially offers caulking groove 22 at drag ring 21, is embedded with brake pad 9 in caulking groove 22, and keep brake pad 9 edge and drag ring to be in same circular arc, the coefficient of friction of this brake pad 9 is comparatively large, to increase brake force, realizes blade 7 stall fast.
More particularly, described drag ring 21 is circumferentially evenly distributed with three caulking grooves 22, and is embedded with brake pad 9 respectively.
Claims (2)
1. an electric tool dead-man's device, comprises motor, clamshell, output shaft and large and small belt pulley and belt; Described motor and output shaft are positioned on clamshell respectively, and small belt pulley is fixed on motor shaft, and big belt pulley is fixed on output shaft, and large and small belt pulley is formed by belt and is in transmission connection; Clamshell is extended with drag ring to big belt pulley side, and big belt pulley is the corresponding brake block being provided with centrifugal action circumferentially, by the spring be arranged between brake block and big belt pulley, brake block is pressed to drag ring; It is characterized in that: drag ring circumferentially offers caulking groove, in caulking groove, be embedded with brake pad, this brake pad edge and drag ring are in same circular arc.
2. a kind of electric tool dead-man's device according to claim 1, is characterized in that: drag ring is circumferentially evenly distributed with three caulking grooves, and is embedded with brake pad respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144422.6U CN204762246U (en) | 2015-03-13 | 2015-03-13 | Electric tool dead mans device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144422.6U CN204762246U (en) | 2015-03-13 | 2015-03-13 | Electric tool dead mans device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204762246U true CN204762246U (en) | 2015-11-18 |
Family
ID=54502418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520144422.6U Expired - Fee Related CN204762246U (en) | 2015-03-13 | 2015-03-13 | Electric tool dead mans device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204762246U (en) |
-
2015
- 2015-03-13 CN CN201520144422.6U patent/CN204762246U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20151118 Termination date: 20190313 |