CN111972116A - Weed winding preventing structure for output shaft of grass trimmer - Google Patents
Weed winding preventing structure for output shaft of grass trimmer Download PDFInfo
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- CN111972116A CN111972116A CN202010705112.2A CN202010705112A CN111972116A CN 111972116 A CN111972116 A CN 111972116A CN 202010705112 A CN202010705112 A CN 202010705112A CN 111972116 A CN111972116 A CN 111972116A
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- output shaft
- blade
- grass
- annular
- accommodating groove
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/416—Flexible line cutters
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D75/00—Accessories for harvesters or mowers
- A01D75/18—Safety devices for parts of the machines
- A01D75/187—Removing foreign objects
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Harvester Elements (AREA)
Abstract
The invention discloses a weed winding prevention structure for an output shaft of a grass trimmer, and aims to provide the weed winding prevention structure for the output shaft of the grass trimmer, which can effectively solve the problem that the output shaft of the grass trimmer is stuck due to weed winding. It includes: the machine shell accommodating groove is formed in the bottom surface of the machine shell; the cutting edge accommodating groove is formed in the outer side face of the output shaft; the blade mounting assembly comprises an annular upper mounting flat plate and an annular lower mounting flat plate which are arranged on the output shaft; the first end of the cutting blade is rotatably arranged on the annular upper mounting flat plate through a shaft lever; the pre-tightening spring is used for driving the cutter blade to rotate downwards around the shaft rod; when the rotation speed of the grass cutting head is greater than the set rotation speed n1 in the working process of the grass trimmer, the cutter blade rotates upwards around the shaft rod under the action of centrifugal force; when the rotation speed of the grass cutting head is less than the set rotation speed n2, the cutter blade rotates downwards around the shaft rod under the action of the pre-tightening spring.
Description
Technical Field
The invention relates to a grass trimmer, in particular to a weed winding preventing structure for an output shaft of the grass trimmer.
Background
The current grass trimmer generally comprises a machine shell, a grass trimming head and a speed reducing motor arranged in the machine shell, wherein the lower end of an output shaft of the speed reducing motor extends downwards to the lower part of the machine shell, and the grass trimming head is fixed at the lower end of the output shaft. Because there is the clearance between casing and the shell of beating the grass head, this makes the machine of beating the grass in the course of the work, on some weeds can twine the output shaft between casing and the shell of beating the grass head, appear beating the grass head load increase, the rotational speed descends, causes the dead stall's of output shaft card even problem.
In order to solve the problem, the applicant filed Chinese patent publication No. CN108934473 on 7/10.2018, invented and created a grass mower with grass winding prevention mowing head, and the applicant filed the name of the grass mower with the grass winding prevention mowing head and cut off wound grass by a wound grass cutting device in the application, but the inventor found that in the actual use process, due to the fact that the rotating speed of the mowing head of the grass mower is high, the centrifugal force is large, and the cutting knife cannot push the sliding rod inwards after winding weeds under the combined action of the centrifugal force and the sliding rod return spring, the wound grass cutting device fails.
Disclosure of Invention
The invention aims to provide a weed winding prevention structure for an output shaft of a grass trimmer, which can effectively solve the problem that the output shaft of the grass trimmer is stuck and stops rotating due to weed winding.
The technical scheme of the invention is as follows:
the utility model provides a grass mower output shaft prevents weeds winding structure, this grass mower output shaft prevents weeds winding structure is arranged in preventing grass mower work process, and weeds winding leads to the dead stall of output shaft card on grass mower's output shaft, the output shaft sets up on grass mower's casing, and the head of beating grass is fixed at the lower extreme of output shaft, and grass mower output shaft prevents weeds winding structure and includes: the shell accommodating groove is formed in the bottom surface of the shell, a notch of the shell accommodating groove faces downwards, an output shaft through hole is formed in the top wall of the shell accommodating groove, and the output shaft sequentially penetrates through the output shaft through hole and the shell accommodating groove; the cutting edge accommodating groove is formed in the outer side face of the output shaft between the machine shell and the grass mowing head, is strip-shaped, and is parallel to the axial direction of the output shaft in the length direction; the blade mounting assembly comprises an annular upper mounting flat plate and an annular lower mounting flat plate which are arranged on the output shaft, the annular upper mounting flat plate and the annular lower mounting flat plate are both positioned in the casing accommodating groove, the annular upper mounting flat plate is close to the top wall of the casing accommodating groove, the lower surface of the annular lower mounting flat plate is flush with the bottom surface of the casing or close to the bottom surface of the casing, and the annular lower mounting flat plate is provided with a strip-shaped cutting blade passing opening; the first end of the cutting blade is rotatably arranged on the lower surface of the annular upper mounting flat plate through a shaft rod, the first end of the cutting blade is close to the output shaft, and the shaft rod is perpendicular to the output shaft; the pre-tightening spring provides elastic force and is used for driving the cutting blade to rotate downwards around the shaft rod and penetrate through the cutting blade through opening so as to enable the cutting edge of the cutting blade to enter the cutting edge accommodating groove; in the working process of the grass trimmer, when the rotating speed of the grass trimming head is greater than the set rotating speed n1, the cutter blade rotates downwards around the shaft rod under the action of centrifugal force, and the cutter blade is completely accommodated in the housing accommodating groove; when the rotation speed of the grass mowing head is less than the set rotation speed n2, the cutter blade rotates downwards around the shaft under the action of the pre-tightening spring and penetrates through the opening of the cutter blade, so that the cutting edge of the cutter blade enters the blade edge accommodating groove, and the set rotation speed n1 is greater than the set rotation speed n 2.
Therefore, after the grass mower is started, when the output shaft drives the grass mowing head to work at a normal rotating speed, the cutter blade rotates upwards around the shaft rod under the action of centrifugal force, and the cutter blade is completely accommodated in the housing accommodating groove; in the grass mower working process, if weeds wind on the output shaft between the casing and the housing of the grass mower, the grass mower load is increased, the rotating speed is reduced, when the rotating speed of the grass mower is reduced to a set rotating speed n2, the cutter blade rotates downwards around the shaft rod under the action of the pre-tightening spring, and the cutting edge of the cutter blade enters the cutting edge accommodating groove, so that the weeds wound on the output shaft are cut off through the cutter blade, the weeds are thrown out after being cut off, the output shaft drives the grass mower to recover to normal rotating speed, and the problem that the output shaft of the grass mower is blocked to stop rotating due to the winding of the weeds is effectively solved.
As the preferred, the upper end of cutting edge holding tank up extends to in the casing holding tank, the cutting blade is crossed mouthful and is linked together with the cutting edge holding tank, the upper end of cutting blade's cutting edge is located the casing holding tank. So, can cut off the back with the winding on being close to the dull and stereotyped weeds of installation under the annular, guarantee that the output shaft can drive the rotation speed work that the head of beating the grass resumes fast normally.
Preferably, the lower end of the output shaft is provided with a connecting screw rod, the connecting screw rod is coaxial with the output shaft, the outer diameter of the connecting screw rod is smaller than that of the output shaft, a bolt connecting hole is formed in the middle of the top surface of the housing of the grass cutting head, the connecting screw rod is in threaded connection with the bolt connecting hole, and the lower end surface of the output shaft abuts against the top surface of the housing of the grass cutting head.
As preferred, the lower extreme of cutting edge holding tank is linked together with the lower terminal surface of output shaft, the top surface of the shell of the head of beating grass is equipped with the opening groove of dodging up, the lower extreme of cutting edge holding tank with dodge the groove and communicate mutually, after the cutting edge of cutting blade got into the cutting edge holding tank, the cutting edge of cutting blade passed cutting edge holding tank lower extreme. Thus, the weeds wound on the output shaft close to the grass cutting head can be cut off.
Preferably, the blade edge of the second end of the cutting blade is provided with an impact block, and after the blade edge of the cutting blade enters the blade edge accommodating groove, the impact block abuts against the side wall of the avoiding groove. Therefore, the collision between the cutting edge of the cutting blade and the output shaft can be avoided.
Preferably, the lower surface of the annular upper mounting plate is provided with an elastic block, and when the cutter blade rotates upwards around the shaft under the action of centrifugal force and is completely accommodated in the housing accommodating groove, the cutter blade abuts against the elastic block. Therefore, the cutter blade can be buffered through the elastic block, and the cutter blade is prevented from rigidly impacting the annular upper mounting plate.
Preferably, the annular upper mounting plate is parallel to the annular lower mounting plate, and the annular upper mounting plate is perpendicular to the output shaft.
Preferably, the housing accommodating groove is a circular groove, the housing accommodating groove is coaxial with the output shaft, and the annular lower mounting flat plate is coaxial with the output shaft.
Preferably, the gap between the annular lower mounting plate and the inner wall of the cabinet receiving groove is 1-2 mm.
Preferably, the pre-tensioning spring is a torsion spring or a coil spring.
The invention has the beneficial effects that: after the grass trimmer is started, when the output shaft drives the grass trimming head to work at a normal rotating speed, the cutter blade rotates upwards around the shaft rod under the action of centrifugal force, and the cutter blade is completely accommodated in the housing accommodating groove; in the grass mower working process, if weeds wind on the output shaft between the casing and the housing of the grass mower, the grass mower load is increased, the rotating speed is reduced, when the rotating speed of the grass mower is reduced to a set rotating speed n2, the cutter blade rotates downwards around the shaft rod under the action of the pre-tightening spring, and the cutting edge of the cutter blade enters the cutting edge accommodating groove, so that the weeds wound on the output shaft are cut off through the cutter blade, the weeds are thrown out after being cut off, the output shaft drives the grass mower to recover to normal rotating speed, and the problem that the output shaft of the grass mower is blocked to stop rotating due to the winding of the weeds is effectively solved.
Drawings
FIG. 1 is a schematic view of the weed winding preventing structure of the output shaft of the grass trimmer of the present invention.
Fig. 2 is an enlarged view of a part a of fig. 1, in which the rotation speed of the grass-mowing head of the grass-mowing machine is less than the set rotation speed n 2.
FIG. 3 is a schematic structural diagram of the anti-wind and anti-blocking device when the rotation speed of the grass cutting head of the grass trimmer of the present invention is greater than the set rotation speed n 1.
In the figure:
the device comprises a shell 1, an output shaft 1.1 and a connecting screw rod 1.2;
2, a grass cutting head;
install dull and stereotyped 3.01 on the annular, install dull and stereotyped 3.02 under the annular, casing holding tank 3.1, cutter piece 3.2, axostylus axostyle 3.3, pretension spring 3.4, cutting edge holding tank 3.5, cutter piece is crossed mouthful 3.6, elastic block 3.7, cutting edge 3.8, dodges groove 3.9.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in figures 1, 2 and 3, the weed winding prevention structure for the output shaft of the grass trimmer is used for preventing weeds from winding on the output shaft of the grass trimmer to cause the output shaft to be locked and stop rotating in the working process of the grass trimmer. Output shaft 1.1 sets up on the casing 1 of machine of beating the grass, in this embodiment, is equipped with gear motor in the casing, and the output shaft is gear motor's output shaft, and the lower extreme of output shaft is down stretched out to the casing below, and the lower extreme at the output shaft is fixed to the head of beating the grass of machine 2, and the head of beating the grass is located the below of casing.
The grass trimmer output shaft weed-winding-prevention structure comprises a machine shell accommodating groove 3.1, a cutting edge accommodating groove 3.5, a blade mounting assembly, a cutting blade 3.2 and a pre-tightening spring 3.4. The casing holding tank 3.1 sets up on the bottom surface of casing, and the notch of casing holding tank sets up down, and the notch orientation of casing holding tank is the head of beating the grass promptly. The roof of casing holding tank is equipped with the output shaft via hole, and output shaft 1.1 passes output shaft via hole and casing holding tank in proper order.
The cutting edge holding groove 3.5 is arranged on the outer side surface of the output shaft between the machine shell and the grass cutting head. The cutting edge holding tank is the bar, and the length direction of cutting edge holding tank is parallel with the axial of output shaft.
The blade mounting assembly includes an annular upper mounting plate 3.01 and an annular lower mounting plate 3.02 disposed on the output shaft. The annular upper mounting plate and the annular lower mounting plate are both located in the casing accommodating groove, the annular upper mounting plate is close to the top wall of the casing accommodating groove, and the annular lower mounting plate is flush with the bottom surface of the casing or close to the bottom surface of the casing. The annular lower mounting flat plate is provided with a strip-shaped cutter blade passing opening 3.6, and in the embodiment, the length direction of the cutter blade passing opening extends along the radial direction of the output shaft.
The first end of cutter piece 3.2 rotates through axostylus axostyle 3.3 and sets up on the annular lower surface of installing the flat board, and in this embodiment, the first end of cutter piece is the upper end of cutter piece promptly. The cutting blade is positioned below the annular upper mounting flat plate. The first end of the cutter blade is close to the output shaft. The shaft lever is vertical to the output shaft. In this embodiment, the cutting blade is in a strip shape. The cutter blade is parallel to the output shaft.
The pre-tightening spring 3.4 provides elastic force for driving the cutter blade to rotate downwards around the shaft rod and penetrate through the cutter blade through opening, so that the cutting edge 3.8 of the cutter blade enters the cutting edge accommodating groove. The pre-tightening spring is a torsion spring or a coil spring, in the embodiment, the pre-tightening spring is a torsion spring, the torsion spring is sleeved on the shaft rod, one end of the torsion spring abuts against the lower surface of the annular upper mounting plate, and the other end of the torsion spring abuts against the convex block on the side face of the cutting blade.
As shown in FIG. 3, when the rotation speed of the grass cutting head is greater than the set rotation speed n1 (in this embodiment, the set rotation speed n1 is 1/5 of the rated rotation speed of the grass cutting machine), the cutter blade rotates upward around the shaft under the action of centrifugal force, and the cutter blade is completely accommodated in the housing accommodating groove; as shown in fig. 2, when the rotation speed of the grass cutting head is less than the set rotation speed n2 (in this embodiment, the set rotation speed n1 is 1/10 of the rated rotation speed of the grass cutting machine) during the operation of the grass cutting machine, the cutting blade rotates downward around the shaft under the action of the pre-tightening spring, and the cutting edge of the cutting blade enters the blade-accommodating groove. The set rotation speed n1 is greater than the set rotation speed n 2.
Therefore, after the grass mower is started, when the output shaft drives the grass mowing head to work at a normal rotating speed, the cutter blade rotates upwards around the shaft rod under the action of centrifugal force, and the cutter blade is completely accommodated in the housing accommodating groove; in the grass mower working process, if weeds wind on the output shaft between the casing and the housing of the grass mower, the grass mower load is increased, the rotating speed is reduced, when the rotating speed of the grass mower is reduced to a set rotating speed n2, the cutter blade rotates downwards around the shaft rod under the action of the pre-tightening spring, and the cutting edge of the cutter blade enters the cutting edge accommodating groove, so that the weeds wound on the output shaft are cut off through the cutter blade, the weeds are thrown out after being cut off, the output shaft drives the grass mower to recover to normal rotating speed, and the problem that the output shaft of the grass mower is blocked to stop rotating due to the winding of the weeds is effectively solved.
Further, as shown in fig. 2, the annular upper mounting plate is parallel to the annular lower mounting plate, and the annular upper mounting plate is perpendicular to the output shaft. The casing holding tank is the circular slot, and casing holding tank and output shaft are coaxial, the annular is installed flat board down and is coaxial with the output shaft. The gap between the annular lower mounting flat plate and the inner wall of the machine shell accommodating groove is 1-2 mm.
In this embodiment, the annular upper mounting plate and the output shaft are of an integrally formed structure or are connected by welding, or the annular lower mounting plate and the output shaft are of an integrally formed structure or are connected by welding.
Further, as shown in fig. 2 and 3, the upper end of the cutting edge accommodating groove 3.5 extends upwards into the casing accommodating groove, the through opening of the cutting blade is communicated with the cutting edge accommodating groove, and the upper end of the cutting edge 3.8 of the cutting blade is located in the casing accommodating groove. So, can cut off the back with the winding on being close to the dull and stereotyped weeds of installation under the annular, guarantee that the output shaft can drive the rotation speed work that the head of beating the grass resumes fast normally.
Further, as shown in fig. 2, a connecting screw rod 1.2 is arranged at the lower end of the output shaft, the connecting screw rod is coaxial with the output shaft, and the outer diameter of the connecting screw rod is smaller than that of the output shaft. The middle part of the top surface of the shell of the grass cutting head is provided with a bolt connecting hole. The connecting screw rod is connected with the bolt connecting hole through threads. The lower end surface of the output shaft is abutted against the top surface of the shell of the grass mowing head.
As shown in fig. 2 and 3, the lower end of the blade receiving groove 3.5 communicates with the lower end surface of the output shaft. The top surface of the shell of the grass cutting head is provided with an avoidance groove 3.9 with an upward opening. The lower extreme of cutting edge holding tank communicates with dodging the groove. After the cutting edge of the cutting blade enters the cutting edge accommodating groove, the cutting edge of the cutting blade penetrates through the lower end of the cutting edge accommodating groove. Thus, the weeds wound on the output shaft close to the grass cutting head can be cut off.
Further, be equipped with the striking piece on the cutting edge of cutting blade's second end, after the cutting edge of cutting blade got into the cutting edge holding tank, the striking piece supported on the lateral wall of dodging the groove. Therefore, the collision between the cutting edge of the cutting blade and the output shaft can be avoided.
Furthermore, as shown in fig. 2 and 3, the lower surface of the annular upper mounting plate is provided with an elastic block 3.7, and when the cutter blade rotates upwards around the shaft rod under the action of centrifugal force and is completely accommodated in the housing accommodating groove, the cutter blade abuts against the elastic block. Therefore, the cutter blade can be buffered through the elastic block, and the cutter blade is prevented from rigidly impacting the annular upper mounting plate. The elastic block is a rubber block.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. A weed winding prevention structure for an output shaft of a grass trimmer is characterized in that the weed winding prevention structure is used for preventing weeds from winding on the output shaft of the grass trimmer in the working process of the grass trimmer to cause the output shaft to be blocked and stop rotating, the output shaft is arranged on a shell of the grass trimmer, a grass cutting head is fixed at the lower end of the output shaft,
the grass trimmer output shaft prevents weeds winding arrangement includes:
the shell accommodating groove is formed in the bottom surface of the shell, a notch of the shell accommodating groove faces downwards, an output shaft through hole is formed in the top wall of the shell accommodating groove, and the output shaft sequentially penetrates through the output shaft through hole and the shell accommodating groove;
the cutting edge accommodating groove is formed in the outer side face of the output shaft between the machine shell and the grass mowing head, is strip-shaped, and is parallel to the axial direction of the output shaft in the length direction;
the blade mounting assembly comprises an annular upper mounting flat plate and an annular lower mounting flat plate which are arranged on the output shaft, the annular upper mounting flat plate and the annular lower mounting flat plate are both positioned in the casing accommodating groove, the annular upper mounting flat plate is close to the top wall of the casing accommodating groove, the lower surface of the annular lower mounting flat plate is flush with the bottom surface of the casing or close to the bottom surface of the casing, and the annular lower mounting flat plate is provided with a strip-shaped cutting blade passing opening;
the first end of the cutting blade is rotatably arranged on the lower surface of the annular upper mounting flat plate through a shaft rod, the first end of the cutting blade is close to the output shaft, and the shaft rod is perpendicular to the output shaft; and
the pre-tightening spring provides elastic force and is used for driving the cutting blade to rotate downwards around the shaft rod and penetrate through the cutting blade through opening so as to enable the cutting edge of the cutting blade to enter the cutting edge accommodating groove;
in the working process of the grass trimmer, when the rotating speed of the grass trimming head is greater than the set rotating speed n1, the cutter blade rotates downwards around the shaft rod under the action of centrifugal force, and the cutter blade is completely accommodated in the housing accommodating groove; when the rotation speed of the grass mowing head is less than the set rotation speed n2, the cutter blade rotates downwards around the shaft under the action of the pre-tightening spring and penetrates through the opening of the cutter blade, so that the cutting edge of the cutter blade enters the blade edge accommodating groove, and the set rotation speed n1 is greater than the set rotation speed n 2.
2. The structure of claim 1, wherein the upper end of the blade-receiving groove extends upward into the housing-receiving groove, the blade-passing opening communicates with the blade-receiving groove, and the upper end of the blade is located in the housing-receiving groove.
3. The structure of claim 1, wherein the lower end of the output shaft is provided with a connecting screw coaxial with the output shaft, the connecting screw has an outer diameter smaller than that of the output shaft, the middle of the top surface of the housing of the grass trimmer is provided with a bolt connecting hole, the connecting screw is in threaded connection with the bolt connecting hole, and the lower end surface of the output shaft abuts against the top surface of the housing of the grass trimmer.
4. The structure of claim 3, wherein the lower end of the blade-receiving groove is connected to the lower end surface of the output shaft, the top surface of the housing of the grass-mowing head is provided with an escape groove with an upward opening, the lower end of the blade-receiving groove is connected to the escape groove, and the blade of the cutter blade passes through the lower end of the blade-receiving groove after entering the blade-receiving groove.
5. The structure of claim 4, wherein the blade at the second end of the blade has an impact block, and the impact block abuts against the sidewall of the avoiding groove when the blade enters the blade-receiving groove.
6. The structure of claim 1, wherein the lower surface of the annular upper mounting plate is provided with a resilient block, and the cutting blade abuts against the resilient block when the cutting blade is rotated upward around the shaft by centrifugal force and is completely received in the receiving groove of the housing.
7. The structure of claim 1, wherein the upper annular mounting plate is parallel to the lower annular mounting plate, and the upper annular mounting plate is perpendicular to the output shaft.
8. The structure of claim 1, wherein the housing receiving groove is a circular groove and is coaxial with the output shaft, and the annular lower mounting plate is coaxial with the output shaft.
9. The structure of claim 8, wherein the gap between the annular lower mounting plate and the inner wall of the housing receiving groove is 1-2 mm.
10. The weed winding preventing structure of the output shaft of the grass trimmer as claimed in claim 1, wherein the pre-tightening spring is a torsion spring or a coil spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705112.2A CN111972116B (en) | 2020-07-21 | 2020-07-21 | Weed winding preventing structure for output shaft of grass trimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010705112.2A CN111972116B (en) | 2020-07-21 | 2020-07-21 | Weed winding preventing structure for output shaft of grass trimmer |
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| Publication Number | Publication Date |
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| CN111972116A true CN111972116A (en) | 2020-11-24 |
| CN111972116B CN111972116B (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010705112.2A Active CN111972116B (en) | 2020-07-21 | 2020-07-21 | Weed winding preventing structure for output shaft of grass trimmer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3928911A (en) * | 1974-10-15 | 1975-12-30 | Jr Charles B Pittinger | Hollow-shaft feed filament trimmer |
| DE2832649C2 (en) * | 1977-07-25 | 1982-08-12 | Weed Eater Inc., Houston, Tex. | Mowing device with a rotating cutting head |
| CN204069756U (en) * | 2014-05-08 | 2015-01-07 | 苏州宝时得电动工具有限公司 | Mower |
| CN205797502U (en) * | 2016-06-14 | 2016-12-14 | 湖北鄂中生态工程股份有限公司 | A kind of centrifuge dripping device being applicable to industrial ammonium phosphate |
| CN106256180A (en) * | 2015-06-19 | 2016-12-28 | 苏州宝时得电动工具有限公司 | Grass-mowing machine |
| CN108811852A (en) * | 2014-10-23 | 2018-11-16 | 南京德朔实业有限公司 | Grass-mowing machine |
| CN110839408A (en) * | 2019-12-24 | 2020-02-28 | 沈阳农业大学 | Anti-winding cutting and reel device of hair vetch harvester |
-
2020
- 2020-07-21 CN CN202010705112.2A patent/CN111972116B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3928911A (en) * | 1974-10-15 | 1975-12-30 | Jr Charles B Pittinger | Hollow-shaft feed filament trimmer |
| DE2832649C2 (en) * | 1977-07-25 | 1982-08-12 | Weed Eater Inc., Houston, Tex. | Mowing device with a rotating cutting head |
| CN204069756U (en) * | 2014-05-08 | 2015-01-07 | 苏州宝时得电动工具有限公司 | Mower |
| CN108811852A (en) * | 2014-10-23 | 2018-11-16 | 南京德朔实业有限公司 | Grass-mowing machine |
| CN106256180A (en) * | 2015-06-19 | 2016-12-28 | 苏州宝时得电动工具有限公司 | Grass-mowing machine |
| CN205797502U (en) * | 2016-06-14 | 2016-12-14 | 湖北鄂中生态工程股份有限公司 | A kind of centrifuge dripping device being applicable to industrial ammonium phosphate |
| CN110839408A (en) * | 2019-12-24 | 2020-02-28 | 沈阳农业大学 | Anti-winding cutting and reel device of hair vetch harvester |
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| Publication number | Publication date |
|---|---|
| CN111972116B (en) | 2021-08-03 |
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Denomination of invention: Weed proof winding structure of the output shaft of the mower Effective date of registration: 20221031 Granted publication date: 20210803 Pledgee: Lishui Jinyun Sub branch of Zhejiang Tailong Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG ZHONGLI TOOLS MANUFACTURE Co.,Ltd. Registration number: Y2022980020218 |
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