CN216722124U

CN216722124U - Mower head

Info

Publication number: CN216722124U
Application number: CN202122818959.4U
Authority: CN
Inventors: 应振华
Original assignee: Jinhua Guangshuo Dynamo Electric Co ltd
Current assignee: Jinhua Guangshuo Dynamo Electric Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-06-14
Anticipated expiration: 2031-11-17

Abstract

The utility model provides a mower head. This lawn mower head includes: the transmission device is arranged in the headstock and comprises a driving gear, a driven gear, an eccentric shaft I, an eccentric shaft II, a swing arm I, a swing arm II and a transmission shaft, the driving gear is engaged with the driven gear, the upper end of the driven gear is movably fixed with the eccentric shaft I and the eccentric shaft II, the two eccentric squares are opposite, the transmission shaft consists of an inner shaft and an outer shaft, the upper end of the inner shaft penetrates through the outer shaft and can rotate independently, a latch II is arranged on the penetrating side of the inner shaft, an external thread is arranged at the upper end of the latch II, the outer wall of the upper end of the outer shaft is provided with a latch I, the lower ends of the outer shaft and the inner shaft are both positioned outside the headstock, a blade is fixed, a circle of U-shaped knife edge groove is arranged at the periphery of the blade, the upper and lower U-shaped knife edge grooves are staggered, the swing arm I and the swing arm II are independently connected with the eccentric shaft I and the latch I as well as the eccentric shaft II and the latch II, so that the power mechanism drives the driving gear to rotate and then enables the two blades to rotate reversely.

Description

Mower head

Technical Field

The utility model belongs to the field of mowers or lawn mowers, and particularly relates to a mower head.

Background

The lawn mower is an instrument for trimming lawn, the current lawn mower head that is used for on the lawn mower has the multiple, some adopt rotatory blade to mow, some twine in rotatory grass mowing dish and beat the grass rope, beat outside grass mowing dish is extended to grass mowing rope two free ends, beat grass mowing dish and throw two free ends of grass mowing rope after rotating and mow, but present no matter be the blade or beat the grass rope and all be high-speed 360 degrees rotatory, when touching stone or hard thing, can provide a very big kinetic energy of stone or hard thing and hit stone or hard thing and fly at a high speed, like this danger very in the use, the use or other people's injured's condition appears easily, serious can cause other people to die.

SUMMERY OF THE UTILITY MODEL

In view of the defects of the existing mower head, the technical problem to be solved by the utility model is as follows: a mower head that is safer to use is provided.

In order to achieve the above object, according to one aspect of the present invention, the present invention is achieved by the following technical measures: a trimmer head, comprising: a headstock, a transmission device and a blade fixing frame,

the inside of the opening at the top of the headstock is hollow to form a storage cavity, the top of the storage cavity is movably sealed by a handpiece cover, the lower end of the storage cavity is provided with a through hole, a bearing is arranged in the through hole, one side of the headstock is also fixedly provided with an obliquely arranged hollow pipe body, and the hollow pipe body is communicated with the storage cavity;

the transmission device comprises a driving gear, a driven gear, an eccentric shaft I, an eccentric shaft II, a swing arm I, a swing arm II and a transmission shaft, wherein the driving gear and the driven gear are arranged in an object placing cavity and are meshed with each other, one side of the driving gear is arranged in a hollow pipe body, the eccentric shaft II and the eccentric shaft I are sequentially arranged on a driven gear shaft of the driven gear from bottom to top, the directions of the eccentric shaft II and the eccentric shaft I deviating from the driven gear shaft are just opposite, the transmission shaft comprises an outer shaft and an inner shaft, the outer shaft is provided with a central hole, a circle of latch I is arranged on the outer wall of the upper end of the outer shaft, the outer shaft at the lower end of the latch I is fixed with a bearing to enable the outer shaft to rotate, the upper end of the inner shaft penetrates through the central hole of the outer shaft, the inner shaft can rotate freely, a circle of latch II is arranged on the penetrating side of the inner shaft at the upper end of the latch II, external threads are further arranged on the inner shaft at the upper end of the latch II, and the swing arm I and the swing arm II are identical in structure, the swing arm I and the swing arm II are hinged, an eccentric shaft hole is formed in the same side, a tooth hole is formed in the other side, the eccentric shaft hole and the tooth hole of the swing arm II are respectively sleeved on the eccentric shaft II and the latch I, the eccentric shaft hole and the tooth hole of the swing arm I are respectively sleeved on the eccentric shaft I and the latch II, and meanwhile, the swing arm I and the outer shaft are fixed through screwing of a nut and outer threads;

the cutter comprises an outer shaft, an inner shaft and two blades, wherein the two blades are disc-shaped, the lower ends of the outer shaft and the inner shaft are respectively provided with one blade, a U-shaped cutter edge groove is formed in one circle of the periphery of each blade, and the cutter edge grooves of the upper blade and the lower blade are alternately distributed.

Further, the lower ends of the outer shaft and the inner shaft are both provided with blade fixing frames, and the blades are fixed on the blade fixing frames.

Compared with the prior art, the utility model has the advantages that: the two blades of the mower head do not rotate at a high speed of 360 degrees in one direction like the blades or grass mowing discs of the existing mower heads, but rotate back and forth in a relatively small range, so that even if the two blades touch stones or hard objects on the grasslands, the stones or the hard objects cannot fly up at a high speed to hurt people, and the mower head is safer to use.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic view of the components of a mower head according to the present invention.

Fig. 2 is a schematic view of the components of the transmission according to the present invention.

Description of reference numerals: 1. a headstock; 2. a transmission device; 3. a blade; 4. a storage cavity; 5. a nose cover; 6. a hollow pipe body; 7. a U-shaped knife edge groove; 8. a driving gear; 9. a driven gear; 10. an eccentric shaft II; 11. an eccentric shaft I; 12. a driven gear shaft; 13. an outer shaft; 14. an inner shaft; 15. a latch I; 16. a latch II; 17. an external thread; 18. a blade holder; 19. a swing arm II; 20. a swing arm I; 21. an eccentric shaft hole; 22. a perforation; 23. and a nut.

Detailed Description

The utility model will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "bottom", "top", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but 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, are not to be construed as limiting the present invention.

Example 1

Referring to fig. 1, the mower head provided by this embodiment includes a head base 1, a head cover 5, a transmission device 2 and blades 3, an article placing cavity 4 is formed in the inside of the top opening of the head base 1, a hollow tube body 6 communicated with the article placing cavity 4 is fixed at the left end of the head base 1, a through hole is formed in the article placing cavity 4, a bearing is fixed in the through hole, the top opening of the article placing cavity 4 is movably sealed by the head cover 5, the blades 3 are two and all in a disk shape, a circle of U-shaped blade edge slots 7 are arrayed on the outer ring of the blade 3, and the U-shaped blade edge slots 7 of the two blades 3 are alternately distributed.

Referring to fig. 2, the driving device 2 includes a driving gear 8, a driven gear 9, an eccentric shaft i 11, an eccentric shaft ii 10, a swing arm i 20, a swing arm ii 20 and a transmission shaft, the driving gear 8 and the driven gear 9 are both fixed in the storage chamber 4, one end of the driving gear shaft of the driving gear 8 is fixed in the hollow tube 6 through a bearing, the driving gear 8 and the driven gear 9 are engaged with each other, the eccentric shaft ii 10 and the eccentric shaft i 11 are sequentially sleeved on a driven gear shaft 12 of the driven gear 9, the directions of the eccentric shaft i 11 and the eccentric shaft ii 10 deviating from the driven gear shaft 9 are opposite, the transmission shaft includes an outer shaft 13 and an inner shaft 14, the center of the outer shaft 13 is provided with a central hole, the outer shaft 13 is fixed with the bearing in the storage chamber 4, a latch i 15 is arranged on the outer wall of the upper end of the outer shaft 13 penetrating through the bearing, a part of the inner shaft 14 penetrates through the central hole of the outer shaft 13, and the inner shaft 14 can rotate freely, a circle of latch II 16 is arranged on the inner shaft 14 part penetrating through the outer shaft 13, an external thread 17 is also arranged on the inner shaft 14 at the upper end of the latch II 16, the swing arm I20 and the swing arm II 19 are the same swing arm and are composed of two sections of swing rods, one end of each of the two swing rods is connected through a hinge, the swing arm I20 and the swing arm II 19 are arranged up and down, the left ends of the swing arm I20 and the swing arm II 19 are both provided with eccentric shaft holes 21, the right ends of the swing arm II are both provided with tooth holes 22, the eccentric shaft holes 21 of the swing arm II 19 are sleeved outside the eccentric shaft II 10, the tooth holes 22 of the swing arm II 19 are sleeved outside the latch I15 of the outer shaft 13 and are meshed with the same, the eccentric shaft holes 21 of the swing arm I20 are sleeved outside the eccentric shaft I11, the tooth holes 22 of the swing arm I20 are sleeved outside the latch II 16 of the inner shaft 14 and are meshed with the same, meanwhile, the inner shaft 14 at the upper end of the swing arm I20 is screwed through a nut, so that the inner shaft 14 cannot be separated from the swing arm I20, and the hinge at the middle part of the two swing arms forms an included angle, the lower ends of the outer shaft 13 and the inner shaft 14 are provided with a blade holder 18, and the blade 3 is fixed to the blade holder 18.

When the mower head provided by the embodiment works, the flexible shaft of the power mechanism is inserted in the hollow pipe body 6 to drive the driving gear 8 to rotate, the driving gear 8 drives the driven gear 9 to rotate, after the two eccentric shafts 11 on the driven gear shaft 12 eccentrically rotate, the two eccentric shafts 11 push the swing arms connected with the two swing arms and the eccentric shafts to move back and forth, so that the other swing arm connected with the transmission shaft is pushed to rotate back and forth around the transmission shaft to push the transmission shaft to rotate back and forth, the directions of pushing the two blades 3 to rotate back and forth are opposite due to the eccentric and opposite arrangement of the two eccentric shafts of the inner shaft 14 and the blade 3 at the lower end of the outer shaft 13 of the transmission shaft, so that the two blades 3 can cut off weeds entering the U-shaped knife edge grooves 7 of the two blades 3, and the blades cannot rotate in one direction at high speed like the blades or grass mowing discs of the existing mower head but rotate back and forth in a relatively small amplitude, even if the lawn mower touches stones or hard objects on the lawn, the stones or the hard objects cannot fly to hurt people, and the lawn mower is safer to use.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various changes and modifications may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A trimmer head, comprising: headstock, transmission and blade, its characterized in that:

the transmission device comprises a driving gear, a driven gear, an eccentric shaft I, an eccentric shaft II, a swing arm I, a swing arm II and a transmission shaft, wherein the driving gear and the driven gear are arranged in an object placing cavity and are in gear engagement, one side of the driving gear is arranged in a hollow tube body, the eccentric shaft II and the eccentric shaft I are sequentially arranged on a driven gear shaft of the driven gear from bottom to top, the directions of the eccentric shaft II and the eccentric shaft I deviating from the driven gear shaft are just opposite, the transmission shaft comprises an outer shaft and an inner shaft, the outer shaft is provided with a central hole, a circle of latch I is arranged on the outer wall of the upper end of the outer shaft, the outer shaft at the lower end of the latch I is fixed with a bearing to enable the outer shaft to rotate, the upper end of the inner shaft penetrates through the central hole of the outer shaft, the inner shaft can rotate freely, a circle of latch II is arranged on the penetrating side of the inner shaft, an external thread is further arranged on the inner shaft at the upper end of the latch II, and the swing arm I and the swing arm II are identical in structure, the swing arm I and the swing arm II are hinged, an eccentric shaft hole is formed in the same side, a tooth hole is formed in the other side, the eccentric shaft hole and the tooth hole of the swing arm II are respectively sleeved on the eccentric shaft II and the latch I, the eccentric shaft hole and the tooth hole of the swing arm I are respectively sleeved on the eccentric shaft I and the latch II, and meanwhile, the swing arm I and the outer shaft are fixed through screwing of a nut and outer threads;

the cutter is characterized in that the number of the blades is two, the blades are disc-shaped, the lower ends of the outer shaft and the inner shaft are respectively provided with one blade, a U-shaped cutter edge groove is formed in one circle of the periphery of each blade, and the U-shaped cutter edge grooves of the upper blade and the lower blade are alternately distributed.

2. A trimmer head according to claim 1, characterized in that: the lower ends of the outer shaft and the inner shaft are both provided with blade fixing frames, and the blades are fixed on the blade fixing frames.