CN210928688U - Grass cutter - Google Patents
Grass cutter Download PDFInfo
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- CN210928688U CN210928688U CN201920753037.XU CN201920753037U CN210928688U CN 210928688 U CN210928688 U CN 210928688U CN 201920753037 U CN201920753037 U CN 201920753037U CN 210928688 U CN210928688 U CN 210928688U
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Abstract
The utility model discloses a mower, including casing, cutting blade and the small-size four-stroke engine of drive cutting blade pivoted of setting in the casing, be provided with the reducing gear box between small-size four-stroke engine and the cutting blade, the reducing gear box links to each other with cutting blade and small-size four-stroke engine respectively, the utility model discloses a with the small-size four-stroke engine that the discharge capacity is low as drive cutting blade pivoted drive arrangement, small-size four-stroke engine reduces speed through the reducing gear box earlier then drive cutting blade rotates and mow, with mower's discharge capacity control in the certain limit, reaches the national emission requirement, reduces the pollution of mower to the environment, protects the environment.
Description
Technical Field
The utility model belongs to the garden machine field, concretely relates to lawn mower.
Background
At present, the engine displacement used by the lawn mower on the market is too large, although certain improvement can be performed by adding a catalyst or adjusting parts, because the structure of the engine is complex and the assembly process cannot be controlled, the one-time emission of the lawn mower cannot reach the national emission standard, and the pollution to the environment is serious.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a low-displacement mower is provided.
In order to solve the technical problem, the utility model adopts the following technical scheme: a mower comprises a machine shell, a cutting blade and a small four-stroke engine arranged in the machine shell and used for driving the cutting blade to rotate, wherein a reduction box is arranged between the small four-stroke engine and the cutting blade and is respectively connected with the cutting blade and the small four-stroke engine.
Furthermore, a clutch is connected to a driving shaft of the small four-stroke engine, and the driving shaft of the small four-stroke engine is connected with the reduction gearbox through the clutch.
Furthermore, the clutch is a centrifugal clutch which comprises a driving part connected with a driving shaft of the small four-stroke engine, a centrifugal body and a driven part connected with the reduction box.
Further, the centrifugal body includes that two are thrown the piece and are connected two first elastic component of throwing between the piece along with the rotating piece that drives, is equipped with the mounting groove on the follower, and two are thrown the piece and are located the mounting groove.
Furthermore, the two flail slices have the same shape and are centrosymmetric, and the head ends of the flail slices are rotatably connected with the driving part.
Further, the reduction gear box includes a pinion gear driven by a small four-stroke engine and a bull gear connected to the cutting blade through an output shaft, the bull gear being in mesh with the pinion gear.
Furthermore, a brake assembly is arranged on the reduction box and comprises a fixedly arranged brake piece, a second elastic piece and a pushing piece, wherein the second elastic piece pushes the large gear to be contacted with the brake piece, the pushing piece pushes the large gear to be separated from the brake piece, the second elastic piece and the pushing piece are respectively positioned on two sides of the large gear, the pushing piece is connected to the output shaft and driven by the large gear, and the pushing piece is linked with the output shaft.
Furthermore, a limiting part for driving the pushing part to rotate is arranged on a web plate of the large gear, and a guide inclined plane for the pushing part to slide is arranged at an included angle between the limiting part and the web plate.
Furthermore, the output shaft is provided with a jack, the pushing piece is a pushing rod, and the pushing rod is connected with the jack in an inserting mode.
Furthermore, the jack is all stretched out at the both ends of catch bar, and the locating part includes first locating part and the second locating part along the axis centrosymmetric of gear wheel, and the direction inclined plane includes along the first direction inclined plane and the second direction inclined plane of the axis centrosymmetric of gear wheel.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the small-sized four-stroke engine is firstly decelerated by the reduction gearbox and then drives the cutting blade to rotate for mowing, the small-sized four-stroke engine with low discharge capacity is used as a driving device for driving the cutting blade to rotate, the discharge capacity of the mower is controlled within a certain range, the national discharge requirement is met, the pollution of the mower to the environment is reduced, and the environment is protected.
2. When the driving shaft of the small four-stroke engine is in a low-speed rotation mode, the clutch is separated from the speed reduction box in time, namely the speed reduction box and the cutting blade do not rotate, after the mower works at a high speed for a period of time, if the mower needs to be moved and the like, the mower only needs to be adjusted to the low-speed rotation mode, so that the driving shaft of the small four-stroke engine keeps rotating at a low speed, the cutting blade can not rotate continuously along with the small four-stroke engine any more without stopping, the mower is convenient to move and the like, the rotating cutting blade in the moving process is prevented from hurting people, meanwhile, a large amount of oil consumption of the mower in the moving process is prevented, and the oil consumption of the mower is reduced.
3. When a driving shaft of the small four-stroke engine is in a high-speed rotation mode, the head ends of the two throwing pieces rotate at a high speed along with the driving part, the centrifugal force applied to the throwing pieces is larger than the elastic force applied to the throwing pieces by the first elastic part, the throwing pieces rotate along the driving part under the action of the centrifugal force, the tail ends of the throwing pieces approach to the side wall of the mounting groove until the outer side wall of the throwing pieces is tightly attached to the side wall of the mounting groove, so that the driven part rotates at high speed along with the driving part through the throwing piece, the driven part drives the reduction gearbox and the cutting blade to rotate, when the driving shaft of the small four-stroke engine resumes the low-speed rotation mode, the centrifugal force applied to the throwing piece is smaller than the elastic force applied by the first elastic piece, the first elastic piece pulls back the two throwing pieces which are tightly attached to the side wall of the driven piece mounting groove, so that the throwing piece is separated from the driven piece, and whether the cutting blade of the mower rotates or not is automatically controlled without manual operation.
4. Get rid of the piece through setting up two of centrosymmetry and make get rid of the piece when pasting tight follower and the area of contact between the follower is bigger, get rid of the frictional force between piece and the follower promptly and be bigger, great frictional force is convenient for get rid of the piece and drives the follower and rotate.
5. Set up brake assembly at the reducing gear box, play the effect of brake to gear wheel, output shaft and cutting blade through the huge frictional force between brake spare and the gear wheel for after the driving machine shut down, cutting blade can be in the short time quick stall, prevents that cutting blade from causing bodily injury under inertial effect.
Compared with the prior art, the utility model discloses a small-size four-stroke engine that will discharge capacity hang down is as drive cutting blade pivoted drive arrangement, and small-size four-stroke engine reduces speed through the reducing gear box earlier then drive cutting blade rotates and mow, with the discharge capacity control of lawn mower in certain extent, reaches the national emission requirement, reduces the pollution of lawn mower to the environment, environmental protection.
Drawings
The invention will be further described with reference to the accompanying drawings and specific embodiments:
FIG. 1 is an assembly view of a small four-stroke engine and a reduction gearbox;
FIG. 2 is a schematic view of a centrifuge;
FIG. 3 is a schematic view of the centrifuge and the driven member in a separated state;
FIG. 4 is a schematic view showing a state in which a centrifuge and a driven member are connected;
FIG. 5 is an assembly schematic of the reduction gearbox;
FIG. 6 is an exploded view of the reduction box;
FIG. 7 is an exploded view of the brake assembly;
fig. 8 is a schematic view of a bull gear.
Wherein: 2. a small four-stroke engine; 31. throwing the slices; 311. connecting holes; 312. a friction plate; 32. a first elastic member; 33. a driven member; 331. mounting grooves; 4. a reduction gearbox; 41. a pinion gear; 42. a bull gear; 43. an output shaft; 51. a braking member; 52. a pusher member; 53. a limiting member; 54. a second elastic member; 55. a guide slope.
Detailed Description
An embodiment of the present invention is further described with reference to fig. 1 to 8.
A mower comprises a machine shell, a cutting blade and a small four-stroke engine 2 arranged in the machine shell and used for driving the cutting blade to rotate, wherein a reduction gearbox 4 is arranged between the small four-stroke engine 2 and the cutting blade, and the reduction gearbox 4 is respectively connected with the cutting blade and the small four-stroke engine 2. The utility model discloses middle-size and small-size four-stroke engine 2 reduces speed through reducing gear box 4 earlier then drives cutting blade and rotates and mow, uses small-size four-stroke engine 2 that the discharge capacity is low as drive cutting blade pivoted drive arrangement, with the discharge capacity control of lawn mower in certain extent, reaches the national emission requirement, reduces the pollution of lawn mower to the environment, environmental protection.
The first embodiment is as follows:
a mower comprises a housing, a cutting blade for cutting grass by rotation and a small four-stroke engine 2 arranged in the housing and used for driving the cutting blade to rotate, wherein a reduction gearbox 4 is arranged between the small four-stroke engine 2 and the cutting blade, the reduction gearbox 4 is respectively connected with the cutting blade and the small four-stroke engine 2, the driving shaft of the small four-stroke engine 2 outputs high-speed rotation to the reduction gearbox 4, after the reduction gearbox 4 reduces the speed, an output shaft 43 of the reduction gearbox 4 drives the cutting blade to rotate, the reduction gearbox 4 reduces the rotating speed of the small four-stroke engine 2 for transmitting to the cutting blade, prolongs the service life of the cutting blade, reduces the small and medium-sized noise generated by the mower, the discharge capacity of the four-stroke engine 2 is controlled between 20CC and 80CC in the process, the discharge capacity of the mower is greatly reduced, the national discharge requirement is, and the environment is protected.
In this embodiment, a clutch is connected to a driving shaft of the small four-stroke engine 2, the driving shaft of the small four-stroke engine 2 is connected to the reduction gearbox 4 through the clutch, the clutch is a centrifugal clutch, the centrifugal clutch includes a driving member connected to the driving shaft of the small four-stroke engine 2, a centrifugal body and a driven member 33 connected to the reduction gearbox 4, the centrifugal body includes two throwing plates 31 rotating with the driving member and a first elastic member 32 connected between the two throwing plates 31, a mounting groove 331 is provided on the driven member 33, the two throwing plates 31 are located in the mounting groove 331, the two throwing plates 31 have the same shape and are centrosymmetric, a connecting hole 311 is provided at a head end of the throwing plate 31, the throwing plate 31 is rotatably connected to the driving member through the connecting hole 311, in this embodiment, preferably, a friction plate 312 for increasing friction force is provided on an outer side wall of the throwing plate 31 facing the mounting groove, when the swinging plate 31 is pressed against the inner wall of the mounting groove 331, the friction plate 312 increases the friction force between the swinging plate 31 and the inner wall of the mounting groove 331, so that the swinging plate 31 drives the driven member 33 to rotate.
When the driving shaft of the small four-stroke engine 2 is in a low-speed rotation mode (namely, an idle mode), the driving part rotates with the driving shaft at a low speed, as shown in fig. 3, the two throwing sheets 31 rotate with the driving part at a low speed, and the throwing sheets 31 and the driven part 33 are in a separated state, namely, the reduction gearbox 4 and the cutting blade do not rotate; when the driving shaft of the small four-stroke engine 2 is in a high-speed rotation mode, as shown in fig. 4, the head ends of the two swinging pieces 31 rotate at a high speed along with the driving part, the centrifugal force applied to the swinging pieces 31 is greater than the elastic force applied to the swinging pieces 31 by the first elastic piece 32, the swinging pieces 31 rotate along the driving part under the action of the centrifugal force, the tail ends of the swinging pieces 31 approach the side wall of the mounting groove 331 until the outer side wall of the swinging pieces 31 is attached to the side wall of the mounting groove 331, so that the driven piece 33 rotates at a high speed along with the driving part through the swinging pieces 31, the driven piece 33 drives the reduction box 4 and the cutting blade to rotate, and at the; when the driving shaft of the small four-stroke engine 2 resumes low speed rotation again, the centrifugal force applied to the flappers 31 is smaller than the elastic force applied by the first elastic members 32, and the first elastic members 32 pull back the two flappers 31 abutting against the side walls of the mounting grooves 331 of the followers 33, so that the flappers 31 are separated from the followers 33. After the mower works at a high speed for a period of time, if the mower needs to be moved and the like, the mower is adjusted to the idle speed mode, so that the driving shaft of the small four-stroke engine 2 keeps rotating at a low speed, the cutting blade can not rotate continuously along with the small four-stroke engine 2 any more without stopping the mower, the mower is convenient to move and the like, the rotating cutting blade in the moving process is prevented from hurting people, meanwhile, the mower is prevented from consuming a large amount of oil in the moving process, and the oil consumption of the mower is reduced.
In this embodiment, the reduction box 4 includes a pinion 41 driven by the small four-stroke engine 2 and a bull gear 42 connected with the cutting blade through an output shaft 43, the bull gear 42 is engaged with the pinion 41, the reduction box 4 is provided with a brake assembly, the brake assembly includes a fixedly arranged brake piece 51, a second elastic piece 54 pushing the bull gear 42 to contact with the brake piece 51 and a pushing piece 52 pushing the bull gear 42 to separate from the brake piece 51, the second elastic piece 54 and the pushing piece 52 are respectively located on two sides of the bull gear 42, the pushing piece 52 is connected to the output shaft 43 and driven by the bull gear 42, and the pushing piece 52 is linked with the output shaft 43.
When the driving shaft of the small four-stroke engine 2 is in a low-speed rotation mode, the large gear 42 is in contact with the braking member 51;
when a driving shaft of the small four-stroke engine 2 is in a high-speed rotation mode, the driven part 33 drives the small gear 41 to rotate, the small gear 41 drives the large gear 42 meshed with the small gear to rotate, the large gear 42 initially rotates and is moved to one side of the second elastic part 54 under the action of the pushing part 52, so that the large gear 42 is separated from the braking part 51, the large gear 42 is prevented from being influenced by the braking part 51 when rotating, then the large gear 42 drives the output shaft 43 of the reduction gearbox 4 to rotate through the pushing part 52, the output shaft 43 drives the cutting blade to rotate for mowing, and at the moment, the small gear 41 continuously drives the large gear 42 to rotate at a constant speed, so that the large gear 42 is in a state of being;
when the small four-stroke engine 2 is turned off, the output shaft 43 of the reduction gearbox 4 and the cutting blade do not stop rotating immediately but continue to rotate under the action of inertia, but because the pinion 41 does not continuously drive the gearwheel 42 to rotate at a constant speed any more, the gearwheel 42 contacts the brake piece 51 under the action of the elastic force of the second elastic piece 54, and the huge friction force between the brake piece 51 and the gearwheel 42 plays a role in braking the gearwheel 42, the output shaft 43 and the cutting blade, so that the cutting blade can stop rotating quickly in a short time after the small four-stroke engine 2 is stopped, and personal injury caused by the action of inertia of the cutting blade is prevented.
In this embodiment, a limiting member 53 for driving the pushing member 52 to rotate is disposed on a web of the large gear 42, a guide inclined surface 55 for the pushing member 52 to slide is disposed at an included angle between the limiting member 53 and the web, when the reduction gearbox 4 operates, the large gear 42 is driven by the small gear 41 to rotate relative to the output shaft 43 first until the pushing member 52 slides along the guide inclined surface 55 to abut against the limiting member 53, so that the large gear 42 moves in a direction separating from the brake member 51 and the pushing member 52 contacts the limiting member 53, then transmission between the large gear 42 and the output shaft 43 is performed through the abutting limiting member 53 and the pushing member 52, when the engine is turned off, the pushing member 52 slides along the guide inclined surface 55 in a direction opposite to that of the start-up, so that the large gear 42 moves in a direction contacting.
In this embodiment, the output shaft 43 is provided with a jack, the pushing member 52 is a push rod, the push rod is inserted into the jack, the jacks are all extended from two ends of the push rod, so that the connection between the push rod and the output shaft 43 is detachable, and the production and maintenance are convenient, the limiting member 53 includes a first limiting member 53 and a second limiting member 53 that are centrosymmetric along the central axis of the gearwheel 42, the guide inclined surface 55 includes a first guide inclined surface 55 and a second guide inclined surface 55 that are centrosymmetric along the central axis of the gearwheel 42, when the gearwheel 42 drives the push rod to rotate, the first limiting member 53 and the second limiting member 53 respectively abut against two ends of the push rod, so that the stress of the push rod is more uniform, the push rod is prevented from being broken due to uneven stress, and the service life of the push rod.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A lawnmower, comprising: including casing, cutting blade and setting at the small-size four-stroke engine of drive cutting blade pivoted in the casing, be provided with the reducing gear box between small-size four-stroke engine and the cutting blade, the reducing gear box links to each other with cutting blade and small-size four-stroke engine respectively, be connected with the clutch in the drive shaft of small-size four-stroke engine, be connected through the clutch between the drive shaft of small-size four-stroke engine and the reducing gear box, the clutch is centrifugal clutch, and centrifugal clutch includes the driving part, the centrifugal body that link to each other with the drive shaft of small-size four-stroke engine and the follower that links to each other with the reducing.
2. A lawnmower as claimed in claim 1, wherein: the centrifugal body includes that two are thrown the piece along with the driving part pivoted and connect two and get rid of the first elastic component between the piece, be equipped with the mounting groove on the follower, two are thrown the piece and are located the mounting groove.
3. A lawnmower as claimed in claim 2, wherein: the two throwing pieces are the same in shape and are centrosymmetric, and the head ends of the throwing pieces are rotatably connected with the driving piece.
4. A lawnmower as claimed in claim 1, wherein: the reduction box comprises a small gear driven by a small four-stroke engine and a large gear connected with a cutting blade through an output shaft, and the large gear is meshed with the small gear.
5. A lawnmower according to claim 4, wherein: the brake assembly is arranged on the reduction box and comprises a brake piece, a second elastic piece and a pushing piece, the brake piece is fixedly arranged, the second elastic piece pushes the large gear to be in contact with the brake piece, the pushing piece pushes the large gear to be separated from the brake piece, the second elastic piece and the pushing piece are respectively located on two sides of the large gear, the pushing piece is connected to the output shaft and driven by the large gear, and the pushing piece is linked with the output shaft.
6. A lawnmower according to claim 5, wherein: the limiting piece is arranged on the web of the large gear and drives the pushing piece to rotate, and a guide inclined plane for the pushing piece to slide is arranged at the included angle between the limiting piece and the web.
7. A lawnmower according to claim 6, wherein: the output shaft is provided with a jack, the pushing piece is a pushing rod, and the pushing rod is connected with the jack in an inserting mode.
8. A lawnmower according to claim 7, wherein: the jack is all stretched out at the both ends of catch bar, the locating part includes first locating part and the second locating part along the axis centrosymmetry of gear wheel, the direction inclined plane includes along the first direction inclined plane and the second direction inclined plane of the axis centrosymmetry of gear wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920753037.XU CN210928688U (en) | 2019-05-23 | 2019-05-23 | Grass cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920753037.XU CN210928688U (en) | 2019-05-23 | 2019-05-23 | Grass cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210928688U true CN210928688U (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920753037.XU Active CN210928688U (en) | 2019-05-23 | 2019-05-23 | Grass cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210928688U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110278776A (en) * | 2019-05-23 | 2019-09-27 | 浙江亚特电器有限公司 | A kind of grass trimmer |
-
2019
- 2019-05-23 CN CN201920753037.XU patent/CN210928688U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110278776A (en) * | 2019-05-23 | 2019-09-27 | 浙江亚特电器有限公司 | A kind of grass trimmer |
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| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: No. 150 Wenlong Road, Yuxin Town, Nanhu District, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Yate Electric Appliance Co.,Ltd. Address before: No. 150 Wenlong Road, Yuxin Town, Nanhu District, Jiaxing City, Zhejiang Province Patentee before: ZHEJIANG YAT ELECTRICAL APPLIANCE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |