CN209089451U - A kind of transmission mechanism for grass trimmer - Google Patents
A kind of transmission mechanism for grass trimmer Download PDFInfo
- Publication number
- CN209089451U CN209089451U CN201821952605.0U CN201821952605U CN209089451U CN 209089451 U CN209089451 U CN 209089451U CN 201821952605 U CN201821952605 U CN 201821952605U CN 209089451 U CN209089451 U CN 209089451U
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- gear wheel
- torsional spring
- output shaft
- rotor
- motor
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Abstract
A kind of transmission mechanism for grass trimmer, including casing are equipped with motor on the casing, and the motor includes rotor；The rotor is connect with gear wheel；The gear wheel is placed on output shaft；The gear wheel lower end is connected with torsional spring；The gear wheel is realized by torsional spring and output shaft and is driven；The output shaft lower end connects blade bearing；The blade bearing lower end is connected with blade.The utility model is realized by torsional spring and output shaft and is driven, and is provided cushion effect by torsional spring when motor just starts and is protected rotor, helical teeth and gear wheel injury-free；And the torsional spring that cuts to hard object when causing blade that can not rotate and gear wheel skidding keep motor, gear wheel injury-free；And by gear drive instead of existing pulley drive, the service life is longer.
Description
Technical field
The utility model relates to mowing apparatus technical fields, more particularly to a kind of transmission mechanism for grass trimmer.
Background technique
The existing general motor of grass trimmer is driven with output shaft by belt and belt pulley, is held using belt long afterwards
Easy to damage, service life is shorter；And when motor just starts, output shaft instantaneous starting, transmission mechanism does not have buffering knot generally
Structure, belt and belt pulley are easy to damage；When encountering special circumstances, when such as cutting to hard object causes blade that can not rotate, it is driven
Mechanism does not have buffer structure yet, and motor is easily damaged.
Utility model content
The utility model is exactly to solve to provide one kind with buffering and releasing structure and use gear-driven mowing
Machine transmission mechanism technical problem.
In order to solve the above technical problems, a kind of technical solution of the transmission mechanism for grass trimmer of the utility model
Are as follows:
Including casing, motor is installed on the casing, the motor includes rotor；The rotor is connect with gear wheel；
The gear wheel is placed on output shaft；The gear wheel lower end is connected with torsional spring；The gear wheel is real by torsional spring and output shaft
Now it is driven；The output shaft lower end connects blade bearing；The blade bearing lower end is connected with blade.
The rotor lower end offers helical teeth；The rotor is connect by helical teeth with gear wheel.
The torsional spring upper end and gear wheel are interference fitted, and lower end and output shaft are interference fitted.
What the utility model can achieve has the technical effect that the utility model realizes transmission by torsional spring and output shaft,
There is provided cushion effect by torsional spring when motor just starts protects rotor, helical teeth and gear wheel injury-free, and cuts to hard object
Torsional spring and gear wheel skidding keep motor, gear wheel injury-free when causing blade that can not rotate；And by gear drive instead of
Existing pulley drive, the service life is longer.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments:
Fig. 1 is a kind of cross-sectional view of the transmission mechanism for grass trimmer of the utility model；
Fig. 2 is the portion the A enlarged drawing of Fig. 1.
Specific embodiment
Further details of elaboration is made to the utility model with reference to the accompanying drawing.
Refering to fig. 1,2.
A kind of transmission mechanism for grass trimmer, including casing 1, motor 2 is equipped on the casing 1, and the motor 2 wraps
Include rotor 3；The rotor 3 is connect with gear wheel 4；The gear wheel 4 is placed on output shaft 5；4 lower end of gear wheel is connected with
Torsional spring 6；The gear wheel 4 is realized by torsional spring 6 and output shaft 5 and is driven；5 lower end of output shaft connects blade bearing 7；The knife
7 lower end of bar is connected with blade 8.
Specifically, 3 lower end of rotor offers helical teeth 9, i.e. 3 lower end of rotor is helical gear；The rotor 3 passes through helical teeth
9 connect with gear wheel 4, and rotor 3 is that gear is connect with gear wheel 4.
Specifically, 6 upper end of torsional spring and gear wheel 4 are interference fitted, lower end and output shaft 5 are interference fitted.
Working principle: the utility model motor 2 is powered, and rotor 3 rotates, and at this moment rotor 3 drives gear wheel 4 to rotate, and
Gear wheel 4 drives output shaft 5 to be driven by torsional spring 6, and in this transmission process, torsional spring 6 itself has an elastic potential energy, needs
One buffering is to drive output shaft 5 to rotate, therefore when motor 2 starts, the not easy damaged of output shaft 5；And the utility model
It is directly connected to connect instead of existing belt pulley with gear wheel 4 by rotor 3, specifically, 3 lower end of rotor offers helical teeth 9,
Rotor 3 is connect by helical teeth 9 with gear wheel 4, and by gear drive instead of existing pulley drive, service life is more
It is long；When blade 8, which cuts to hard object, causes blade 8 that can not rotate, torsional spring 6 has elastic potential energy, can buffer to the power,
Motor 2 is hardly damaged, and specific 6 upper end of torsional spring and gear wheel 4 are interference fitted, and lower end and output shaft 5 are interference fitted, because of torsional spring 6
It is not dead fixation, when power is excessive, torsional spring 6 can be rotated around gear wheel 4 or output shaft 5, motor 2, big to thread off
Gear 4 is hardly damaged.
Claims (3)
1. a kind of transmission mechanism for grass trimmer, including casing (1), motor (2), feature are installed on the casing (1)
Be: the motor (2) includes rotor (3)；The rotor (3) connect with gear wheel (4)；The gear wheel (4) is placed on output
On axis (5)；Gear wheel (4) lower end is connected with torsional spring (6)；The gear wheel (4) is real by torsional spring (6) and output shaft (5)
Now it is driven；Output shaft (5) lower end connects blade bearing (7)；Blade bearing (7) lower end is connected with blade (8).
2. a kind of transmission mechanism for grass trimmer according to claim 1, it is characterised in that: rotor (3) lower end
Offer helical teeth (9)；The rotor (3) is connect by helical teeth (9) with gear wheel (4).
3. a kind of transmission mechanism for grass trimmer according to claim 1, it is characterised in that: torsional spring (6) upper end
It is interference fitted with gear wheel (4), lower end and output shaft (5) are interference fitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821952605.0U CN209089451U (en) | 2018-11-26 | 2018-11-26 | A kind of transmission mechanism for grass trimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821952605.0U CN209089451U (en) | 2018-11-26 | 2018-11-26 | A kind of transmission mechanism for grass trimmer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209089451U true CN209089451U (en) | 2019-07-12 |
Family
ID=67161358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821952605.0U Active CN209089451U (en) | 2018-11-26 | 2018-11-26 | A kind of transmission mechanism for grass trimmer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209089451U (en) |
-
2018
- 2018-11-26 CN CN201821952605.0U patent/CN209089451U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |