CN216492152U

CN216492152U - Pruning mechanism of gardens trimming machine

Info

Publication number: CN216492152U
Application number: CN202123322724.2U
Authority: CN
Inventors: 任洁林; 徐峰
Original assignee: Shandong Langsen Machinery Co ltd
Current assignee: Shandong Langsen Machinery Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-05-13
Anticipated expiration: 2031-12-27

Abstract

The utility model relates to the field of garden machinery, in particular to a trimming mechanism of a garden trimmer. The scissors comprise an upper scissor blade, a lower scissor blade and a transmission mechanism for driving the two scissor blades to reciprocate in opposite directions simultaneously, wherein the transmission mechanism comprises a gear box and a transmission gear set arranged in the gear box; the transmission gear set comprises a power input shaft, a transmission pinion fixed on the power input shaft, a transmission gearwheel, an eccentric camshaft and two eccentric cams fixedly assembled on the eccentric camshaft. The utility model adopts gear transmission, and drives the upper and lower shear blades to reciprocate through the two eccentric cams respectively, so as to finish the trimming operation, the structure is simple and compact, the transmission efficiency is high, meanwhile, the bearings are respectively assembled on the two eccentric cams, so that the movement resistance between the eccentric cams and the shear blade sliding sleeves can be greatly reduced, the abrasion between the eccentric cams and the shear blade sliding sleeves can be reduced, and the service life can be prolonged.

Description

Pruning mechanism of gardens trimming machine

Technical Field

The utility model relates to the field of garden machinery, in particular to a trimming mechanism of a garden trimmer.

Background

The garden trimmer is mainly equipment for trimming hedges, and when the garden trimmer works, power needs to be transmitted to the shear blade from a power source, and circular motion of a power input shaft is converted into linear reciprocating motion of the shear blade through a specific transmission mechanism.

The utility model patent (CN210183970U) discloses a trimming mechanism for a flower trimming device, which comprises a casing, a charging port, a first handle, a switch button, a second handle, a branch pipe, a fixed blade, a movable blade, a storage battery, a motor and a first transmission mechanism; the first transmission mechanism consists of a rotating shaft, a first gear set, a second gear set, a bearing, a connecting shaft, a supporting bar, a second transmission mechanism and a third transmission mechanism; the second transmission mechanism and the third transmission mechanism have the same structure and are composed of a first support plate, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a second support plate and a third support plate; the movable blade of the trimming device is controlled by the trimming mechanism through the arrangement of the first transmission mechanism and the second transmission mechanism, so that the trimming mechanism is matched with the fixed blade to complete trimming operation. However, the transmission mechanism of the trimming mechanism is provided with a plurality of connecting rods, so that the structure is complicated and the transmission efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a trimming mechanism of a garden trimmer so as to solve the technical problems.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a pruning mechanism of gardens trimming machine, includes two shear blades and the drive mechanism who drives two shear blades reciprocating motion in opposite directions simultaneously, its characterized in that: the transmission mechanism comprises a gear box and a transmission gear set arranged in the gear box; the transmission gear set comprises a power input shaft, a transmission pinion fixed on the power input shaft, a transmission gearwheel, an eccentric camshaft and two eccentric cams fixedly assembled on the eccentric camshaft; the driving large gear is assembled on the eccentric cam shaft, is positioned below the two eccentric cams and is constantly meshed with the driving small gear; the two eccentric cams are axially symmetrical to the rotation center of the transmission gear wheel; a blade support is fixed at the front end of the gear box, two shear blades are arranged on the blade support, and sliding sleeve grooves are respectively fixed at the tail parts of the two shear blades; the sliding sleeve grooves at the tail parts of the two shear blades are positioned in the gear box, and the two eccentric cams are respectively arranged in the sliding sleeve grooves at the tail parts of the two shear blades in a one-to-one correspondence manner.

Preferably, bearings are respectively mounted on the outer portions of the two eccentric cams.

Preferably, the middle parts of the two shear blades are respectively provided with a long hole, the two shear blades are vertically stacked on the blade support and assembled on the gear box through two bolts; the two bolts penetrate through the strip holes of the two shear blades and the assembly holes of the blade support from top to bottom and are fastened on the gear box; and pressing sheets are respectively arranged at the top ends of the two bolts.

Preferably, the two bolts are respectively sleeved with sliding sleeves, and the sliding sleeves are positioned in the long strip holes of the two shear blades.

Has the advantages that: compared with the prior art, the utility model adopts gear transmission, and drives the upper and lower shear blades to reciprocate through the two eccentric cams respectively, so as to carry out pruning operation, the structure is simple and compact, the transmission efficiency is high, meanwhile, the bearings are respectively assembled on the two eccentric cams, so that the movement resistance between the eccentric cams and the shear blade sliding sleeves can be greatly reduced, the abrasion between the eccentric cams and the shear blade sliding sleeves is reduced, and the service life is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the present invention.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

Example (b):

referring to fig. 1 and 2, the pruning mechanism of the garden pruning machine according to the present embodiment includes an upper cutting blade 4, a lower cutting blade 3, and a transmission mechanism for driving the two cutting blades to reciprocate in opposite directions.

The transmission mechanism comprises a gear box 1 and a transmission gear set arranged in the gear box 1; the transmission gear set comprises a power input shaft 7, a transmission pinion 71 fixed on the power input shaft 7, a transmission gearwheel 81, an eccentric cam shaft 8, an upper eccentric cam 83 and a lower eccentric cam 82 which are fixedly assembled on the eccentric cam shaft 8. The driving gearwheel 81 is assembled on the eccentric camshaft 8 and is positioned below the two eccentric cams, specifically, the eccentric camshaft 8 below the two eccentric cams is a special-shaped shaft at one end, a special-shaped hole is formed in the middle of the driving gearwheel 81, the driving gearwheel 81 is assembled on the eccentric camshaft 83 through the insertion and matching of the special-shaped shaft and the special-shaped hole, and the driving gearwheel 81 is normally meshed with the driving pinion 71. The upper eccentric cam 83 and the lower eccentric cam 82 are axially symmetrical to the rotation center of the transmission gear wheel 81.

A blade support 2 is fixed at the front end of the gear box 1, an upper shear blade 4 and a lower shear blade 3 are installed on the blade support, specifically, the middle parts of the two shear blades are respectively provided with a strip hole, the two shear blades are vertically stacked on the blade support 2 and assembled on the gear box 1 through two bolts 6; the two bolts 6 penetrate through the strip holes of the two shear blades and the assembly holes of the blade support 3 from top to bottom and are fastened on the gear box 1; simultaneously, the top of two bolts 6 is provided with the preforming respectively, and it has sliding sleeve 5 still to overlap respectively on two bolts 6, and two sliding sleeves 5 all are located the rectangular hole of two shear blades, play the effect of stay bolt 6 and direction, and under the direction of sliding sleeve 5, can only do straight reciprocating motion when lower shear blade 3, upper shear blade 4 atress.

The tails of the upper shear blade 4 and the lower shear blade 3 are respectively fixed with a sliding sleeve groove, the sliding sleeve grooves at the tails of the two shear blades are positioned in the gear box 1, the upper eccentric cam 83 is positioned in the sliding sleeve groove at the tail of the upper shear blade 4, the outer part of the upper eccentric cam is provided with an upper bearing 83A, the lower eccentric cam 82 is positioned in the sliding sleeve groove at the tail of the lower shear blade 3, and the outer part of the lower eccentric cam is provided with a lower bearing 82A. The two eccentric cams are respectively provided with the bearings, so that the movement resistance between the eccentric cams and the shear blade sliding sleeves can be greatly reduced, the abrasion between the eccentric cams and the shear blade sliding sleeves is reduced, and the service life is prolonged.

The working principle of the trimming mechanism of the utility model is briefly described as follows:

when the garden trimmer works, power acts on the input gear shaft 7, the input gear shaft 7 drives the two eccentric cams to do circular motion around the rotating center of the transmission gear wheel 81 through the transmission eccentric cam shaft 8 of the transmission gear wheel 81 and the transmission pinion 71, the upper eccentric cam 83 acts on the sliding sleeve groove at the tail of the upper shear blade 4 through the upper bearing 83A, the lower eccentric cam 82 acts on the sliding sleeve groove at the tail of the lower shear blade 3 through the lower bearing 82A, and the upper shear blade 4 and the lower shear blade 3 are forced to do reciprocating linear motion in opposite directions to perform trimming operation. In the whole process, the upper eccentric cam 83 and the lower eccentric cam 82 transmit force to the scissor elements 3 and 4 through the upper bearing 83A and the lower bearing 82A respectively, sliding friction is generated only through the bearings, and the resistance and the abrasion are small.

The foregoing shows and describes the fundamental principles, principal features and technical characteristics of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the claims and their equivalents.

Claims

1. The utility model provides a pruning mechanism of gardens trimming machine, includes two shear blades and the drive mechanism who drives two shear blades reciprocating motion in opposite directions simultaneously, its characterized in that: the transmission mechanism comprises a gear box and a transmission gear set arranged in the gear box; the transmission gear set comprises a power input shaft, a transmission pinion fixed on the power input shaft, a transmission gearwheel, an eccentric camshaft and two eccentric cams fixedly assembled on the eccentric camshaft; the driving large gear is assembled on the eccentric cam shaft, is positioned below the two eccentric cams and is constantly meshed with the driving small gear; the two eccentric cams are axially symmetrical to the rotation center of the transmission gear wheel; a blade support is fixed at the front end of the gear box, two shear blades are arranged on the blade support, and sliding sleeve grooves are respectively fixed at the tail parts of the two shear blades; the sliding sleeve grooves at the tail parts of the two shear blades are positioned in the gear box, and the two eccentric cams are respectively arranged in the sliding sleeve grooves at the tail parts of the two shear blades in a one-to-one correspondence manner.

2. The trimming mechanism of the landscape trimmer according to claim 1, wherein: and bearings are respectively arranged outside the two eccentric cams.

3. The trimming mechanism of the landscape trimmer according to claim 1 or 2, wherein: the middle parts of the two shear blades are respectively provided with a long hole, the two shear blades are vertically stacked on the blade support and are assembled on the gear box through two bolts; the two bolts penetrate through the strip holes of the two shear blades and the assembly holes of the blade support from top to bottom and are fastened on the gear box; and pressing sheets are respectively arranged at the top ends of the two bolts.

4. The trimming mechanism of the landscape trimmer according to claim 3, wherein: the two bolts are respectively sleeved with sliding sleeves, and the sliding sleeves are positioned in the long strip holes of the two shear blades.