CN210328619U - Hedgerow trimming machine head - Google Patents

Abstract

The utility model provides a hedgerow pruning aircraft nose, relates to hedgerow trimming machine apparatus technical field, including the case shell, the one end opening of case shell sets up, installs two at least rotary cutter in the case shell, and the direction of rotation of two rotary cutter sets up along the rotation in opposite directions of feed direction, and the case shell is in and has seted up the bin outlet with an end face that the opening is relative, and the bin outlet is in between two cutters. The utility model solves the problems that in the traditional technology, due to single contact cutting between a plurality of cutters and the hedgerow, combined cutting can not be formed, so that the throwing-out direction of the branches is indefinite, and partial power is wasted; the branches are thrown on a high-speed road surface under the rotary cutting action of a cutter to influence a vehicle running at a high speed; and the cut broken branches are easy to be bagged and need to be broken and cut twice manually.

Description

Hedgerow trimming machine head

Technical Field

The utility model relates to a hedge trimmer apparatus technical field, concretely relates to hedge trimmer aircraft nose.

Background

The median greening of the expressway mainly aims at beautifying the traffic environment and preventing vehicles from dazzling at night, and the driving safety is not facilitated by too high and too low greening growth. The median greening and pruning of the expressway is an important content of expressway greening and maintenance, and the improvement of the working efficiency of the median greening and pruning is important for reducing the enterprise cost and improving the safety factor.

The regular pruning of the greening is an important content of daily maintenance, and the greening pruning method plays a key role in the work efficiency and safety. Traditional afforestation is pruned, is pruned by the handheld hedge trimmer of operation personnel manual work, or utilizes machinery and the lower simple and easy repacking equipment of degree of automation to prune, assists the manual work to collect, and personnel's intensity is higher when pruning the operation, so field operation factor of safety is lower.

Therefore, the vehicle-mounted pruning machine is generally adopted in the market, the mobile platform is a light truck, and the diesel engine unit is used as the power of the pruning device and can be used for pruning the hedgerow

The chinese national intellectual property office discloses a utility model patent that patent number is ZL2018211298554, this patent includes the transmission case, be equipped with hydraulic motor including transmission case top one end, transmission case bottom is equipped with the fixed plate, the fixed plate middle part has set firmly the driving shaft bearing frame, the driving shaft bearing frame rotates and has the driving shaft, the driving shaft top links to each other with hydraulic motor's output, fixed plate one end is equipped with the bar hole, the bar downthehole slip is equipped with the driven shaft bearing frame, driven shaft bearing frame internal rotation has the driven shaft, the driven shaft top passes through belt drive mechanism and links to each other with the driving shaft, driven shaft bearing frame one side is equipped with the tensioning bolt, driving. The utility model discloses a driving shaft drives the driven shaft and rotates to realize that two trimming blades prune the hedgerow simultaneously, the tensioning bolt has improved belt drive mechanism's transmission efficiency, and terminal surface separation and reunion tooth has reduced the regulation degree of difficulty of arm moreover, has improved the pruning efficiency of hedgerow, has reduced the pruning cost.

However, the device gradually exposes the defects of the device in the actual production and use process:

firstly, although the device utilizes the trimming blade to trim the hedgerow, the blade that the device adopted is half-sheet type structure, this just leads to the device in the drive blade rotation in-process, has the condition of certain eccentric force for the whole vibration of device appears, and long time, the phenomenon that makes easily appear taking off between the part, makes the phenomenon that the trimming blade easily appears the departure, causes the potential safety hazard to human body and peripheral vehicle.

Secondly, the device adopts half-chip type, and the rotating speed of the device needs to be advanced to ensure the cutting of the hedgerow, so that the contact times of the blade and the hedgerow in unit time are increased, the output power of a power mechanism for driving the cutter to rotate is increased, the service life is prolonged, and the energy consumption is increased.

Thirdly, after the hedgerow is cut by the half-sheet type blade, because the blade and the hedgerow are cut at a time, when the broken branches are collected by workers, the broken branches also need to be broken and cut off, so that the transportation and the processing of subsequent bagging are facilitated, but the mode also improves the output of labor force undoubtedly.

Fourthly, the blade that the device adopted is half piece formula structure, and this just leads to the device to have certain eccentric force's the condition in the drive blade rotation process, and the time is up for the cutter appears radially and axial drunkenness at the rotation in-process, has increaseed the wearing and tearing of cutter, has reduced the cycle of the change of cutter, has improved the output of cost.

Fifthly, as the hedge trimming cutter often suffers from hard solids in the hedge trimming process, the local stress of the blade is uneven, the blade is stretched and broken, and the device is likely to be shut down for maintenance.

Sixth, local wear of the spindle is easily severe due to instability in the rotation process of the tool, which results in the need to replace the spindle, but the production cost of the spindle is high, which increases production.

Seventh, when the device trims the hedgerow by using the cutter, the broken branches are thrown forward along the cutter under the rotary cutting action of the cutter and then fall on the road surface, so that the phenomenon of falling branches on the road surface is caused, and certain potential safety hazards exist for running vehicles.

Eighthly, branches scattered on the ground are irregular due to cutting of the cutter, so that workers are affected by vehicles to and fro when cleaning the branches on the road surface, great safety threat is caused to the workers, time periods with few traffic flows are manually selected or roadblocks are manually arranged to avoid the traffic flows as much as possible, but the labor force is huge in the mode, and the problem cannot be solved fundamentally.

Ninth, the device installs the cutter through the transmission case, but the cutter part exposes outside the transmission case, in the process of cutting the hedgerow, the phenomenon that the hedgerow after being smashed throws away along the rotation direction of cutter often appears, causes the scattered area of broken branches big, is difficult for carrying on workman's subsequent cleaning work.

Tenth, when the device trims the side of the hedge, the side of the transmission case is limited by the ground, and the side of the transmission case often collides with the ground, and the phenomenon is that the body of the transmission case is easily damaged by collision and the phenomenon of welding failure occurs; secondly, vibration generated by collision is easily transmitted to the cutter assembly, damage is caused to the cutter, the service life of equipment is shortened, and the maintenance cost is improved.

Eleventh, the hedgerow feed amount of the device is lower, when the hedgerow with large width appears, must carry out the phenomenon of pruning twice, has increased operating time, and has reduced work efficiency.

Twelfth, when the device cuts the hedgerow through the cutter, a plurality of cutters and the branch are all in single contact cutting, so that when the branch is cut again, the throwing-out direction is uncertain, and the combined cutting among the cutters cannot be fully utilized, so that partial power is wasted, and the waste of the power is caused.

From the above, it is obvious that the prior art has inconvenience and disadvantages in practical use, so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a hedge trimming machine head which is used for solving the problem that the trimming device in the traditional technology can not form combined cutting because of single contact cutting between a plurality of cutters and hedges, so that the throwing direction of branches is indefinite and partial power is wasted; the branches are thrown on a high-speed road surface under the rotary cutting action of a cutter to influence a vehicle running at a high speed; and the cut broken branches are easy to be bagged and need to be broken and cut twice manually.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a hedgerow trimmer head, includes the case shell, the one end opening of case shell sets up, install two at least rotary cutter in the case shell, and two the direction of rotation of rotary cutter sets up along the rotation in opposite directions of feed direction, the case shell be in with the bin outlet has been seted up to the terminal surface that the opening is relative, just the bin outlet is in two between the cutter.

The rotary cutters are three, and the other rotary cutter is positioned between the two rotary cutters and close to the discharge opening.

As an improved scheme, an auxiliary feeding hole communicated with the opening is further formed in the bottom surface of the box shell.

As an improvement, the edge of the auxiliary feeding hole away from the opening is located on the center line where the rotary cutter rotates.

As an improved scheme, a plurality of flexible baffles which are vertically arranged and used for closing the opening are arranged at the opening in parallel.

As an improved scheme, the discharge opening is connected with a negative pressure collecting device.

As an improvement, the rotary cutter is mounted on the top surface of the housing by a positioning assembly.

As an improved scheme, the rotary cutter comprises an upper cutter and a lower cutter which are horizontally arranged in parallel, a thinning space is formed between the upper cutter and the lower cutter, and the upper cutter and the lower cutter are vertically arranged in a overlooking state.

As an improved scheme, the positioning assembly comprises a main shaft, a fixed sleeve is sleeved on the main shaft, and a radial positioning component and an axial positioning plate component are arranged between the main shaft and the fixed sleeve.

As an improved scheme, the two ends of the lower cutter are provided with arc-shaped plates which are used for forming rotary air flow when rotating.

As a refinement, the opening is inclined to the feed direction.

As an improved scheme, a fixed seat is arranged between the central position of the upper cutter and the central position of the lower cutter.

As an improvement, the upper tool and the lower tool are in the same rotating track.

As an improved scheme, the lower cutter comprises a lower cutter seat plate, two ends of the lower cutter seat plate are fixedly connected with connecting plates respectively in an inclined downward mode, horizontally arranged lower cutter bodies are fixedly connected through the connecting plates, and lower cutting edges are respectively arranged on the side walls, located in front of the rotating direction, of the two lower cutter bodies.

As an improved scheme, the arc-shaped plate is fixedly connected to the lower cutter body.

As a modified solution, the arc-shaped plate is located on the side wall of the lower cutter body behind the rotation direction.

As an improved scheme, the upper cutter comprises an upper cutter body, and the side walls of the two ends of the upper cutter body in front of the rotating direction are respectively provided with an upper cutting edge.

As an improvement, the lower blade and the upper blade are in the same rotational track.

As an improved scheme, the discharge opening is connected with a material suction guide cylinder through a guide cylinder which is arranged in a tapered mode along the discharge direction.

As a refinement, the discharge opening occupies the 1/2 region of the end face.

As an improved scheme, the large-caliber end of the guide cylinder is connected with the discharge opening, and the small-caliber end of the guide cylinder is connected with the material suction guide cylinder.

As an improved scheme, rollers are arranged on the outer walls of two sides of the box shell.

As an improved scheme, an anti-collision rubber plate is further installed on one side of the roller.

As an improved scheme, the top surface of the box shell is arranged in a gradually expanding mode at a position close to the opening.

As a refinement, the end wall of the housing opposite the opening is in transitional connection with the adjacent side wall.

As an improved scheme, a pressing plate is installed at the position, located on the top face, of the opening, and the upper end portions of the flexible baffles are fixed to the opening through the pressing plate.

As a refinement, the pressure plate is mounted on the end wall of the top surface of the cabinet by bolts, and the bolts also penetrate the flexible baffle.

As an improved scheme, mounting seats are respectively mounted on the opposite inner walls of the box shell close to the opening, the rollers are rotatably mounted on the mounting seats, and the wheel walls of the rollers extend out of the side walls of the box shell and extend to the outside.

As an improved scheme, the top surface of the box shell is also provided with a connecting frame.

As a modification, a mounting table for mounting a tool is further installed on the top surface of the housing.

As an improved scheme, the radial positioning component comprises bearings respectively sleeved at two ends of the main shaft, outer rings of the two bearings abut against the inner wall of the sleeve, and inner rings of the bearings abut against the peripheral wall of the main shaft.

As an improved scheme, a stepped hole used for positioning the axial distance between the two bearings is formed in the inner wall of the fixed sleeve, and one end faces, opposite to each other, of outer rings of the two bearings are respectively abutted against the end faces of the stepped hole.

As an improved scheme, an annular groove is coaxially formed in the stepped hole, a check ring is installed in the annular groove, and one end face of the check ring abuts against the other end face of the outer ring of the bearing.

As an improved scheme, the axial positioning component comprises spacing sleeves respectively sleeved at two ends of the main shaft, the bearing is positioned between the two spacing sleeves, and opposite end faces of the two spacing sleeves respectively abut against end faces of the two bearing inner rings.

As an improved scheme, a mounting boss is coaxially and fixedly connected to the lower end part of the main shaft, and the other end face of the spacer sleeve positioned below abuts against the mounting boss.

As an improved scheme, the upper end part of the main shaft is further in threaded connection with a fixing nut, and the fixing nut abuts against the other end face of the spacing sleeve above the fixing nut.

As an improved scheme, a gasket is further arranged between the fixing nut and the end face of the spacer sleeve above the fixing nut.

As an improved scheme, the fixing sleeve is further sleeved and fixedly connected with a connecting flange, a protruding portion is further arranged on the outer peripheral wall of the fixing sleeve, and the upper end portion of the fixing sleeve is connected with the fixing protrusion.

As an improved scheme, the upper end part of the main shaft is also provided with a key groove, and a key is installed in the key groove in a transition fit mode.

As a modified solution, the lower end of the mounting boss mounts the rotary cutter.

As an improved scheme, a mounting cylinder is arranged between the central position of the upper cutter and the central position of the lower cutter.

As an improved scheme, the upper end part of the mounting cylinder body is fixedly connected with a blocking plate, a plurality of corresponding pin holes are formed between the blocking plate and the mounting boss, and the upper cutter is arranged between the blocking plate and the mounting boss and is radially fixed through a pin shaft.

As an improved scheme, a threaded hole is further formed in the blocking plate, a fixing screw is arranged in the threaded hole, and the tail end of the fixing screw penetrates through the upper cutter and is connected to the mounting boss in a threaded mode.

As an improved scheme, a fixing groove is formed in the cylinder wall of the lower end part of the installation cylinder, the lower cutter is restrained in the fixing groove, a fixing cover plate is further installed at the lower end part of the installation cylinder through a screw, and the screw is in threaded connection with the cylinder wall of the installation cylinder.

Compared with the prior art, the beneficial effects of the utility model are that:

the two cutters rotate oppositely, so that the repeated contact cutting of the branches is realized, and the thinning rate of broken branches is enhanced; the two cutters oppositely rotate at the discharge opening, and the rotating cutters can be used for providing power for the broken branches, so that the broken branches are directionally thrown to the discharge opening, and auxiliary power is provided for discharging; a third cutter is arranged between the two cutters, the broken branches are refined again by the third cutter, combined cutting among the three cutters is fully utilized, and the contact frequency and the contact time between the broken branches and the cutters are greatly improved; the flexible baffle and the box body form a coating space, so that branches can be prevented from scattering outwards, and the trimmed branches can be guided and discharged by combining with the material suction guide cylinder, so that the hedgerow can be trimmed and waste branch collection can be carried out at the same time, the phenomenon that the branches scatter on the road surface can not occur, and workers do not need to collect the branches; the operation safety of workers is ensured, and the labor intensity of the workers is reduced; the rotating track of the box shell coating cutter is realized, and the operation safety environment of workers is ensured; the flexible baffle is arranged at the opening, so that when the hedgerow is trimmed by the cutter, broken branches are limited by the flexible baffle and cannot fly out along the rotating direction of the cutter, the potential safety hazards of workers and vehicles are eliminated, the scattering area of the broken branches is reduced, and the subsequent waste branch cleaning work is facilitated; the anti-collision rubber plate is arranged to realize flexible contact with the ground when the box shell is in a vertical state, and the rollers are arranged to realize the effect of assisting in supporting the box shell to advance, so that the phenomenon of box shell desoldering caused by collision with the ground is eliminated; and reduces damage to the tool assembly; the maintenance period is prolonged, and the cost is reduced; the feeding port is inclined to the hedgerow entering direction, so that the feeding amount of the hedgerow is increased, the working time is reduced, and the working efficiency is improved; the main shaft is positioned axially and radially by utilizing the matching between the bearing and the spacing sleeve and the main shaft and the fixed sleeve, so that the play of the main shaft in the rotating process is reduced, the abrasion of the assembly is reduced, the service life is prolonged, and the cost is reduced; the stability in the rotating process is ensured through the bearing, the abrasion of the main shaft is reduced, and along with the use, when a play gap occurs, only the bearing needs to be replaced, so that the production cost is greatly reduced; the cutter and the assembly are detachably mounted, when the cutter is stretched, the corresponding parts can be detached to realize maintenance and replacement, so that the assembly and disassembly steps are reduced, and the working time is shortened; the arc-shaped plate of the lower cutter rotates to form a rotating ascending air flow, the rotating ascending air flow can blow up the trimmed branches and leaves, and the arc-shaped plate has the function of throwing the branches and leaves upwards; wherein the broken branches move upwards and can be matched with a collecting device to realize collection; the cut broken branches are cut again with a cutter above the cut broken branches, so that the thinned broken branches are conveniently and manually bagged; the rotation along the center of the cutter is realized, and the stability during the rotation is ensured; the two cutters are provided with 4 cutting edges, so that the cutting efficiency of the two cutters in unit time is 4 times that of a half-sheet cutter in the prior art; the high hedgerow cutting times are realized while the low-speed rotation is realized, and the energy consumption is reduced; and reduces the wear of the cutter; and four blades are arranged along the center in a rotating way, so that the rotating stability is further improved; the rotating tracks of the two cutters are the same, so that the coaxiality of the two cutters is ensured; the phenomena of loosening of parts and flying of blades are prevented, and the safety of workers and vehicles is guaranteed; the design is reasonable, and the matching among structures is precise; the operation is convenient and fast; the follow-up part is simplified, and the fault rate in the working process is reduced; the stability in the working process is improved; the parts are few, the working procedure is simple and convenient, and the failure rate is low; simple structure and long service life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the top view of the present invention;

fig. 3 is a schematic structural view of the present invention in a bottom view;

fig. 4 is a schematic structural view of the flexible baffle of the present invention;

fig. 5 is a schematic structural view of the positioning assembly of the present invention;

FIG. 6 is a schematic structural view of the connecting flange of the present invention;

fig. 7 is a schematic structural view of the cover plate of the present invention;

FIG. 8 is a schematic structural view of the rotary cutter of the present invention;

fig. 9 is a schematic view of the rotary cutter according to the present invention in a bottom view;

in the figure: 1-a box shell; 2-anti-collision rubber plates; 3, rolling wheels; 4-mounting a table; 5-a connecting frame; 6-mounting a base; 7-a flexible baffle; 8-pressing a plate; 9-ear plate; 10-auxiliary feeding hole; 11-a guide cylinder; 12, a material sucking guide cylinder; 13-a hydraulic motor; 14-auxiliary cutter; 15-a main shaft; 16-a fixed sleeve; 17-a bearing; 18-a retainer ring; 19-spacer sleeve; 20-fixing the nut; 21-a gasket; 22-a connecting flange; 23-upper cutter; 24-mounting the cylinder; 25-lower cutter; 26-a pin shaft; 27-a set screw; 28-cover plate; 29-an upper cutter body; 30-upper blade; 31-a lower cutter saddle plate; 32-a connecting plate; 33-arc-shaped plates; 34-a lower cutter body; 35-lower blade.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1 to 9, the hedge trimmer head comprises a case shell 1, wherein an opening is formed in one end of the case shell 1, at least two rotary cutters are installed in the case shell 1, the two rotary cutters are arranged in a manner of rotating in opposite directions along a feeding direction, a discharge opening is formed in one end face, opposite to the opening, of the case shell 1, and the discharge opening is formed between the two cutters.

The rotary cutters are three, and the other rotary cutter is positioned between the two rotary cutters and is close to the discharge opening.

And an auxiliary cutter 14 is also arranged between the rotary cutter close to the discharge port and the other rotary cutter on the inner top surface of the box shell 1 and rotates oppositely along the feeding direction.

An auxiliary feeding hole 10 communicated with the opening is also formed on the bottom surface of the box shell 1.

The edge of the auxiliary feed hole 10 remote from the opening is on the centre line where the rotary cutter rotates.

A plurality of flexible baffles 7 which are vertically arranged and used for closing the opening are also arranged at the opening in parallel.

The discharge port is connected with a negative pressure collecting device.

The negative pressure collecting device is a common negative pressure type collecting device on the market, for example, the material suction guide tube 12 is connected with an air suction pipeline, and the broken branches and leaves in the pruning device are pumped into the collecting box under the negative pressure by a fan.

The rotary cutter is mounted on the top surface of the case 1 through a positioning component.

The rotary cutter comprises an upper cutter 23 and a lower cutter 25 which are horizontally arranged in parallel, a thinning space is formed between the upper cutter 23 and the lower cutter 25, and the upper cutter 23 and the lower cutter 25 are vertically arranged in a plan view state.

The positioning assembly comprises a main shaft 15, a fixed sleeve 16 is sleeved on the main shaft 15, and a radial positioning component and an axial positioning plate component are arranged between the main shaft 15 and the fixed sleeve 16.

The lower cutter 25 is provided at both ends thereof with arc-shaped plates 33 for forming a rotating air flow when rotated.

The openings are inclined to the feed direction.

A fixed seat is arranged between the central position of the upper cutter 23 and the central position of the lower cutter 25.

The upper cutter 23 and the lower cutter 25 are in the same rotation track.

The lower cutter 25 comprises a lower cutter base plate 31, two ends of the lower cutter base plate 31 are respectively and fixedly connected with a connecting plate 32 in an inclined downward mode, a horizontally arranged lower cutter body 34 is fixedly connected with the connecting plates 32, and the side walls of the two lower cutter bodies 34 in front of the rotating direction are respectively provided with a lower cutting edge 35.

The arc plate 33 is fixed on the lower cutter body 34.

The arc plate 33 is located on the side wall of the lower cutter body 34 rearward in the rotational direction.

The upper cutter 23 includes an upper cutter body 29, and the side walls of both ends of the upper cutter body 29 located in front in the rotation direction are respectively provided with an upper blade 30.

The lower blade 35 and the upper blade 30 are in the same rotational trajectory.

The discharge opening is connected with a material suction guide cylinder 12 through a guide cylinder 11 which is arranged in a tapered way along the discharging direction.

The discharge opening occupies the area 1/2 of the end face.

The large-caliber end of the guide cylinder 11 is connected with a discharge opening, and the small-caliber end is connected with a material suction guide cylinder 12.

The outer walls of the two sides of the box shell 1 are provided with rollers 3.

And an anti-collision rubber plate 2 is further installed on one side of the roller 3.

The top surface of the case shell 1 is arranged in a gradually expanding manner near the opening.

The end wall of the cabinet 1 opposite the opening is in transition connection with the adjacent side wall.

The opening is arranged at the top surface and provided with a pressing plate 8, and the upper ends of the flexible baffles 7 are fixed at the opening through the pressing plate 8.

The pressure plate 8 is mounted on the end wall of the top surface of the cabinet 1 by bolts, which also penetrate the flexible baffle 7.

The relative inner wall of case shell 1 near the opening is installed the mount pad 6 respectively, and gyro wheel 3 rotates to be installed on mount pad 6, and the wheel wall of gyro wheel 3 stretches out in the lateral wall of case shell 1 to extend to the outside.

And two mounting lug plates 9 are fixedly connected to one outer side wall of the box shell 1 in parallel, and a roller 3 is also arranged between the two mounting lug plates 9. Because the pruning machine is used by being close to the left side of the road, one side of the pruning machine is arranged, and the pruning machine can be used in a standing mode when the side wall is downward.

The outer part of the box shell 1 at the end surface of the discharge port is also provided with rollers 3,

the top surface of the box shell 1 is also provided with a connecting frame 5.

The housing 1 also has a mounting table 4 mounted on the top surface thereof for mounting tools.

The radial positioning component comprises bearings 17 respectively sleeved at two ends of the main shaft 15, outer rings of the two bearings 17 are abutted against the inner wall of the sleeve, and inner rings of the bearings 17 are abutted against the peripheral wall of the main shaft 15.

The inner wall of the fixed sleeve 16 is provided with a step hole for positioning the axial distance between the two bearings 17, and the end faces of the outer rings of the two bearings 17, which are opposite to each other, are respectively abutted against the end faces of the step hole.

An annular groove is coaxially formed in the stepped hole, a retainer ring 18 is installed in the annular groove, and one end face of the retainer ring 18 abuts against the other end face of the outer ring of the bearing 17.

The axial positioning component comprises spacing sleeves 19 respectively sleeved at two ends of the main shaft 15, the bearings 17 are positioned between the two spacing sleeves 19, and opposite end faces of the two spacing sleeves 19 respectively abut against end faces of inner rings of the two bearings 17.

The lower end of the main shaft 15 is coaxially and fixedly connected with a mounting boss, and the other end surface of the lower spacing sleeve 19 is abutted against the mounting boss.

A fixing nut 20 is further screwed to the upper end of the main shaft 15, and the fixing nut 20 abuts against the other end surface of the spacer 19 located above.

A spacer 21 is also provided between the fastening nut 20 and the upper end face of the spacer sleeve 19.

The fixing sleeve 16 is further fixedly sleeved with a connecting flange 22, the outer peripheral wall of the fixing sleeve 16 is further provided with a protruding portion, and the upper end portion of the fixing sleeve 16 is connected with the fixing protruding portion.

The upper end of the main shaft 15 is also provided with a key groove, and a key is installed in the key groove in a transition fit manner.

The lower end part of the mounting boss is provided with a rotary cutter.

An installation cylinder 24 is installed between the center position of the upper cutter 23 and the center position of the lower cutter 25.

The upper end of the mounting cylinder 24 is fixedly connected with a blocking plate, a plurality of corresponding pin holes are formed between the blocking plate and the mounting boss, and the upper cutter 23 is arranged between the blocking plate and the mounting boss and radially fixed through a pin shaft 26.

Wherein, the blocking plate is also provided with a threaded hole, a fixing screw 27 is arranged in the threaded hole, and the tail end of the fixing screw 27 passes through the upper cutter 23 to be connected on the mounting boss in a threaded manner.

The hydraulic motor 13 is connected with the main shaft 15 through a coupling, and the upper cutter 23 and the lower cutter 25 are driven to rotate by the hydraulic motor 13 through the main shaft 15.

The lower end of the mounting cylinder 24 has a cylindrical wall with a fixing groove, the lower tool 25 is constrained in the fixing groove, and the lower end of the mounting cylinder 24 is further provided with a fixing cover plate 28 by a screw, which is screwed on the cylindrical wall of the mounting cylinder 24.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (10)

1. A hedge trimmer head, characterized in that: including case shell (1), the one end opening of case shell (1) sets up, install two at least rotary cutter in case shell (1), and two rotary cutter's direction of rotation is along the direction of feed and is rotated the setting in opposite directions, case shell (1) be in with the bin outlet has been seted up to the terminal surface that the opening is relative, just the bin outlet is in two between the cutter.

2. A hedge trimmer head according to claim 1, characterized in that: the rotary cutters are three, and the other rotary cutter is positioned between the two rotary cutters and close to the discharge opening.

3. A hedge trimmer head according to claim 1, characterized in that: an auxiliary feeding hole (10) communicated with the opening is further formed in the bottom surface of the box shell (1).

4. A hedge trimmer head according to claim 3, characterized in that: the edge of the auxiliary feeding hole (10) far away from the opening is positioned on the central line of the rotating cutter.

5. A hedge trimmer head according to claim 1, characterized in that: and a plurality of flexible baffles (7) which are vertically arranged and used for closing the opening are also arranged at the opening in parallel.

6. A hedge trimmer head according to claim 1, characterized in that: the discharge port is connected with a negative pressure collecting device.

7. A hedge trimmer head according to claim 1, characterized in that: the rotary cutter is arranged on the top surface of the box shell (1) through a positioning component.

8. A hedge trimmer head according to claim 1, characterized in that: the rotary cutter comprises an upper cutter (23) and a lower cutter (25) which are horizontally arranged in parallel, a thinning space is formed between the upper cutter (23) and the lower cutter (25), and the upper cutter (23) and the lower cutter (25) are vertically arranged in a overlooking state.

9. A hedge trimmer head according to claim 7, characterized in that: the positioning assembly comprises a main shaft (15), a fixed sleeve (16) is sleeved on the main shaft (15), and a radial positioning component and an axial positioning plate component are arranged between the main shaft (15) and the fixed sleeve (16).

10. A hedge trimmer head according to claim 8, characterized in that: and arc-shaped plates (33) which are used for forming rotary air flow when rotating are arranged at two ends of the lower cutter (25).

Images