CN112449902A - Hedgerow trimming cutter head and hedgerow trimming operation vehicle - Google Patents
Hedgerow trimming cutter head and hedgerow trimming operation vehicle Download PDFInfo
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- CN112449902A CN112449902A CN202011341602.5A CN202011341602A CN112449902A CN 112449902 A CN112449902 A CN 112449902A CN 202011341602 A CN202011341602 A CN 202011341602A CN 112449902 A CN112449902 A CN 112449902A
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- cutter
- trimming
- air injection
- leaves
- housing
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/04—Apparatus for trimming hedges, e.g. hedge shears
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/002—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees for comminuting plant waste
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/24—Gas suction systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
Abstract
The invention discloses a hedge trimming cutter head and a hedge trimming operation vehicle, the hedge trimming cutter head comprises a trimming cutter for trimming and crushing branches and leaves on a surface to be trimmed, a cutter frame for mounting the trimming cutter, a housing covering the trimming cutter, and a cutter driving mechanism for driving the trimming cutter to rotate and cut, the housing is provided with a suction pipe connected with the air inlet end of a suction device and positioned behind the trimming cutter, the suction pipe forms suction airflow for sucking the trimmed and crushed branches and leaves in the housing into a collection device under the suction action of the suction device, the hedge trimming cutter head also comprises a high-pressure air injection mechanism arranged in the housing and connected with the air outlet end of a high-pressure air supply device, the air injection end of the high-pressure air injection mechanism is positioned in front of the trimming cutter, and high-pressure air is injected towards the trimming rear through the air injection end of the high-pressure air injection mechanism, so as to form jet airflow for spraying the pruned and crushed branches and leaves in the housing to the suction pipe, thereby realizing the rapid collection of the pruned and crushed branches and leaves under the synergistic action of the suction airflow and the jet airflow.
Description
Technical Field
The invention relates to the technical field of hedge trimming equipment, in particular to a hedge trimming cutter head and a hedge trimming operation vehicle.
Background
The hedge trimming operation vehicle trims and crushes the branches and leaves on the hedge by operating the hedge trimming cutter head, and sucks the crushed branches and leaves in the hedge trimming cutter head into the collecting device by operating the suction device, but the prior hedge trimming operation vehicle operation suction device is difficult to suck all the crushed branches and leaves in the hedge trimming cutter head into the collecting device, so that a part of the crushed branches and leaves fall outside and need manual collection, and a part of the crushed branches and leaves are retained in the hedge trimming cutter head, so that a cutter is easy to be blocked, the trimming efficiency is low, and the trimming effect is poor.
Disclosure of Invention
The invention provides a hedge trimming cutter head and a hedge trimming operation vehicle, and aims to solve the technical problem that the conventional hedge trimming operation vehicle is difficult to operate a suction device to quickly suck branches and leaves crushed in the hedge trimming cutter head into a collection device.
According to one aspect of the invention, a hedge trimmer is provided, which comprises a cutter for trimming and crushing branches and leaves on a surface to be trimmed, a cutter frame for mounting the cutter, a housing covering the cutter, and a cutter driving mechanism for driving the cutter to rotate and cut, wherein the housing is provided with a suction pipe connected with an air inlet end of a suction device and positioned behind the trimming of the cutter, the suction pipe forms an air suction flow for sucking the branches and leaves trimmed and crushed in the housing into a collection device under the suction action of the suction device, the hedge trimmer further comprises a high-pressure air injection mechanism arranged in the housing and connected with an air outlet end of a high-pressure air supply device, an air injection end of the high-pressure air injection mechanism is positioned in front of the trimming of the cutter, and high-pressure air is injected towards the rear of the trimming through the air injection end of the high-pressure air injection mechanism to form an air injection flow for injecting the branches and leaves trimmed and crushed in the housing to the suction pipe, therefore, the clipped and broken branches and leaves can be quickly collected under the synergistic action of the air suction flow and the air injection flow.
Further, the high-pressure air injection mechanism comprises a conveying pipe connected with the air outlet end of the high-pressure air supply device and an air injection pipe communicated with the conveying pipe, and the air injection pipe is positioned in front of the trimming of the cutter.
Further, a plurality of gas injection pipes communicate with the delivery pipe to expand the flow area of the gas injection flow.
Furthermore, a plurality of conveying pipes respectively extend to the inlet of the housing along two sides of the housing, and are communicated and connected with the air outlet end of the same high-pressure gas supply device; or a plurality of conveying pipes are independently arranged and are respectively connected with the air outlet ends of different high-pressure gas supply devices.
Furthermore, a plurality of air injection pipes are positioned at the inlet of the housing and distributed in a rake shape so as to comb the branches and leaves on the surface to be pruned and guide the branches and leaves to extend into the cutter for pruning and crushing.
Further, the cutters comprise front side cutters and middle cutters which are arranged along the trimming direction, the two front side cutters are a group of cutters and are respectively arranged on two sides of the front of the middle cutter, the two front side cutters rotate inwards along the trimming direction, the plurality of air injection pipes are located on two sides of the housing and jet high-pressure air towards the intersection of the front side cutters and the middle cutters, and therefore branches and leaves trimmed by the two front side cutters are guided to intersect to the middle cutters for further crushing.
Furthermore, the air injection end of the high-pressure air injection mechanism is lower than the highest point of the suction pipe, and the end surface of the air injection end of the high-pressure air injection mechanism is inclined upwards, so that a part of high-pressure air injected by the air injection end of the high-pressure air injection mechanism flows downwards to form an upward flow.
Further, the air injection end of the high-pressure air injection mechanism is flush with or lower than the rotary cutting surface of the cutter, and the air injection airflow injected by the air injection end of the high-pressure air injection mechanism forms a high-speed air curtain for preventing the trimmed and broken branches and leaves from falling out of the housing at the rotary cutting surface of the cutter or below the rotary cutting surface.
Further, the flow rate of the high-pressure gas supply device is 20% -50% of the flow rate of the suction device.
According to another aspect of the invention, there is also provided a hedge trimming working vehicle comprising the above hedge trimming cutter head.
The invention has the following beneficial effects:
the hedge trimming cutter head of the invention is characterized in that a high-pressure air injection mechanism is arranged in a housing, the high-pressure air injection mechanism is connected with an air outlet end of a high-pressure air supply device, an air injection end of the high-pressure air injection mechanism is positioned in front of trimming of a cutter, when hedge trimming operation is carried out, high-pressure air is conveyed to the high-pressure air injection mechanism through the high-pressure air injection mechanism, the air injection end of the high-pressure air injection mechanism sprays high-pressure air towards the rear of trimming, so that air injection airflow for spraying the trimmed and crushed branches and leaves in the housing to a suction pipe is formed, in addition, the suction pipe positioned at the rear of trimming of the cutter is connected with an air inlet end of a suction device, and suction airflow for sucking the trimmed and crushed branches and leaves in the housing into a collection device is formed at the suction pipe through the suction effect of the suction device, so that the trimmed and crushed branches and leaves in the housing are quickly conveyed into the collection device under, the efficiency of hedgerow pruning operation is improved, simultaneously also avoid broken branch and leaf to be detained in the housing and cause the cutter to block.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a hedge trimmer cutter head in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic top view of the hedge trimmer cutter head of the preferred embodiment of the present invention;
FIG. 3 is a side elevational schematic view of the hedge trimmer cutter head of the preferred embodiment of the present invention;
FIG. 4 is a schematic structural view of a gas lance in accordance with a preferred embodiment of the present invention;
FIG. 5 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention;
FIG. 6 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention;
FIG. 7 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention;
FIG. 8 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention;
FIG. 9 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a flow-guiding cavity according to another embodiment of the present invention;
fig. 11 is a schematic structural view of a flow port according to another embodiment of the present invention.
Illustration of the drawings:
1. a tool holder; 2. a cutter; 21. a front side cutter; 22. an intermediate cutter; 23. rotating the disc; 24. a shaft sleeve; 25. fastening screws; 26. fastening a nut; 27. a spring washer; 3. a blade; 31. a single layer blade; 32. a bottom layer blade; 33. a middle layer blade; 34. a top layer blade; 4. a tool driving mechanism; 5. a housing; 51. a straw; 52. a flow-through port; 53. a rubber baffle; 6. a baffle assembly; 61. a flow guide cavity; 62. a front flow guide plate; 63. a side baffle; 7. a seal plate assembly; 8. a high pressure air injection mechanism; 81. a delivery pipe; 82. a gas ejector tube; 100. a face to be trimmed; 200. rotating the cut surface; 300. an effective suction pick-up area.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
FIG. 1 is a schematic view of a hedge trimmer cutter head in accordance with a preferred embodiment of the present invention; FIG. 2 is a schematic top view of the hedge trimmer cutter head of the preferred embodiment of the present invention; FIG. 3 is a side elevational schematic view of the hedge trimmer cutter head of the preferred embodiment of the present invention; FIG. 4 is a schematic structural view of a gas lance in accordance with a preferred embodiment of the present invention; FIG. 5 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention; FIG. 6 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention; FIG. 7 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention; FIG. 8 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention; FIG. 9 is a schematic view of a hedge trimmer cutter in accordance with another embodiment of the present invention; FIG. 10 is a schematic structural diagram of a flow-guiding cavity according to another embodiment of the present invention; fig. 11 is a schematic structural view of a flow port according to another embodiment of the present invention.
As shown in fig. 1, the hedge trimmer according to the present embodiment includes a cutter 2 for trimming and crushing branches and leaves on a surface 100 to be trimmed, a cutter frame 1 for mounting the cutter 2, a housing 5 covering the cutter 2, and a cutter driving mechanism 4 for driving the cutter 2 to rotate and cut, the housing 5 is provided with a suction pipe 51 connected to an air inlet end of a suction device and located behind the cutter 2 for trimming, and the suction pipe 51 forms a suction airflow for sucking the branches and leaves trimmed and crushed in the housing 5 into a collecting device through a suction effect of the suction device. The suction duct 51 is formed with an effective suction and pickup area 300 in front thereof by the action of the suction airflow, so that the branches and leaves in the effective suction and pickup area 300 are sucked into the collecting device and cannot be retained in the housing 5. The hedge trimmer further comprises a high-pressure air injection mechanism 8 which is arranged in the housing 5 and connected with the air outlet end of the high-pressure air supply device, the air injection end of the high-pressure air injection mechanism 8 is positioned in front of trimming of the cutter 2, and high-pressure air is injected towards the rear of trimming through the air injection end of the high-pressure air injection mechanism 8 so as to form air injection airflow which is used for injecting the trimmed and crushed branches and leaves in the housing 5 to the suction pipe 51, and therefore the trimmed and crushed branches and leaves are rapidly collected under the synergistic effect of the air suction airflow and the air injection airflow. The high-pressure gas sprayed from the gas spraying end of the high-pressure gas spraying mechanism 8 to the back of the pruning machine can drive the surrounding gas to flow to the back of the pruning machine, so as to guide the pruned and broken branches and leaves in the housing 5 to flow to the suction pipe 51.
As shown in figure 1, the hedge trimmer according to the present invention is configured such that a high pressure air injection mechanism 8 is installed in a housing 5, the high pressure air injection mechanism 8 is connected to an air outlet end of a high pressure air supply device, and an air injection end of the high pressure air injection mechanism 8 is located in front of trimming of a blade 2, when hedge trimming is performed, high pressure air is supplied to the high pressure air injection mechanism 8 through the high pressure air injection mechanism 8, and the air injection end of the high pressure air injection mechanism 8 injects high pressure air toward the rear of trimming, thereby forming an air injection flow for injecting trimmed and crushed branches and leaves in the housing 5 to a suction pipe 51, and further, the suction pipe 51 located behind trimming of the blade 2 is connected to an air inlet end of a suction device, and an air suction flow for sucking the trimmed and crushed branches and leaves in the housing 5 into a collection device is formed at the suction pipe 51 by a suction effect of the suction device, so that the trimmed and crushed branches and leaves in the housing 5 are rapidly crushed and trimmed under a synergistic effect of the air The branches and leaves are conveyed into the collecting device, so that the efficiency of hedge trimming operation is improved, and meanwhile, the phenomenon that the cutter 2 is clamped due to the fact that the broken branches and leaves are retained in the housing 5 is avoided.
As shown in fig. 1 and 2, the high-pressure gas injection mechanism 8 includes a delivery pipe 81 connected to the gas outlet end of the high-pressure gas supply device, and a gas injection pipe 82 communicated with the delivery pipe 81, and the gas injection pipe 82 is located in front of the trimming of the cutter 2. The air inlet end of the conveying pipe 81 is fixedly arranged on the housing 5 and is connected with the air outlet end of the high-pressure air supply device through a conveying hose. The high-pressure gas provided by the high-pressure gas supply device is conveyed into the gas injection pipe 82 through the conveying pipe 81, and then is injected from the gas injection port of the gas injection pipe 82 to the back of the trimming to form a gas injection flow, and the surrounding gas is driven to flow to the back of the trimming.
As shown in fig. 1 and 2, a plurality of gas injection pipes 82 communicate with the conveyance pipe 81 to enlarge the flow area of the gas injection flow. By enlarging the flow area of the jet air flow, the flow area of the jet air flow is equal to or larger than the distribution area of the trimmed and crushed branches and leaves in the housing 5, and more trimmed and crushed branches and leaves in the housing 5 are ensured to rapidly flow to the suction pipe 51 under the action of the jet air flow.
As shown in fig. 1 and 2, a plurality of delivery pipes 81 respectively extend to the inlet of the housing 5 along two sides of the housing 5, and the plurality of delivery pipes 81 are communicated and connected with the air outlet end of the same high-pressure gas supply device; or a plurality of conveying pipes 81 are independently arranged and are respectively connected with the air outlet ends of different high-pressure gas supply devices. In this embodiment, two delivery pipes 81 respectively extend to the inlet of the housing 5 along two sides of the housing 5, and the two delivery pipes 81 are respectively connected to the outlet ends of the two high-pressure gas supply devices. The plurality of gas lances 82 are arranged along the extension direction of the feed pipe 81 and are located at both sides of the housing 5 and at the inlet of the housing 5, respectively.
As shown in fig. 1 and 2, a plurality of air nozzles 82 are located at the inlet of the housing 5, and the plurality of air nozzles 82 are distributed in a rake shape to comb the branches and leaves on the surface 100 to be trimmed and guide the branches and leaves to extend into the cutter 2 for trimming and crushing. Optionally, an openable trimming inlet formed by arranging a plurality of rubber baffles 53 side by side is arranged in front of the trimming of the housing 5; the front side of the housing 5 touches the branches and leaves to be pruned so that the rubber baffle 53 is bent upwards and avoided, and then the branches and leaves to be pruned extend into the position of the cutter 2 for pruning. The branches to be trimmed on the hedge are extended into the cutter 2 assembly from the gaps among a plurality of rubber plates or the lower part of the rubber plates for trimming. The rubber baffle 53 can prevent the branches and leaves in the hedge trimmer cutter head from splashing forwards, can improve the sealing performance of the front end of the hedge trimmer cutter head, and improves the effect of the air suction flow and the air injection flow on the branch and leaf crushing. As shown in fig. 1 and 2, the cutter 2 includes front cutters 21 and a middle cutter 22 arranged along the trimming direction, the two front cutters 21 are respectively arranged at two sides in front of the middle cutter 22, both the two front cutters 21 rotate inward along the trimming direction, and a plurality of air injection pipes 82 are positioned at two sides of the housing 5 to inject high-pressure air toward the junction of the front cutters 21 and the middle cutter 22, so as to guide branches and leaves trimmed by the two front cutters 21 to meet the middle cutter 22 for further crushing. The suction pipe 51 is located behind the trim of the middle cutter 22. In the embodiment, the branches and leaves to be trimmed firstly extend into the front side cutter 21 from gaps among a plurality of spray pipes at the inlet of the housing 5 or below the rubber plate for trimming, the branches and leaves trimmed by the front side cutter 21 rapidly flow into the middle cutter 22 for further crushing under the combined action of the inertia of the branches and leaves, the air jet flow and the air suction flow, and the branches and leaves crushed by the middle cutter 22 are rapidly discharged from an outlet under the combined action of the inertia of the branches and leaves, the air jet flow and the air suction flow, and then are conveyed into the collecting device.
The number of blades on the middle cutter 22 is greater than the number of blades on the front cutter 21. The branches and leaves trimmed by the front side cutter 21 have a large volume, and the branches and leaves trimmed by the middle cutter 22 have a small volume. In this embodiment, the front cutter 21 is provided with one layer of blades, and the middle cutter 22 is provided with two layers of blades along the axial direction. Alternatively, the middle cutter 22 is provided with three layers of blades in the axial direction. The cutting edges of the inserts on both the middle cutter 22 and the front cutter 21 face upwards.
The front cutter 21 and/or the intermediate cutter 22 comprises a rotary disc 23 mounted on the tool carrier 1 and connected to the output of the cutter drive mechanism 4, a plurality of blades being arranged in the circumferential direction of the rotary disc 23. The cutter driving mechanism 4 corresponds to the cutters 2 one by one, the cutter driving mechanism 4 comprises a bearing seat arranged on the cutter frame 1, a rotating motor fixed on the bearing seat and a rotating shaft in transmission connection with an output shaft of the rotating motor, the rotating shaft is arranged in the bearing seat through a bearing, and the rotating disc 23 is arranged on the rotating shaft, so that the cutter driving mechanism 4 drives blades on the rotating disc 23 to rotate to trim branches and leaves.
As shown in fig. 5, another embodiment of a hedge trimmer includes a trimming cutter assembly, a cutter frame 1 for mounting the trimming cutter assembly, and a cutter driving mechanism 4 for driving the trimming cutter assembly to rotationally cut, the trimming cutter assembly includes a plurality of sets of cutters 2 arranged along a trimming direction, the cutters 2 include blades 3, the blades 3 on two adjacent sets of cutters 2 are arranged in a staggered manner in layers, and the rotational cutting surfaces 200 of two adjacent sets of cutters 2 are partially overlapped in an axial direction of the cutters 2, and an initial cutting side of the rotational cutting surface 200 of the cutter 2 is inclined to a to-be-trimmed surface 100 of the hedge, so that the initial cutting sides of the plurality of sets of cutters 2 are in the same plane, and thus the to-be-trimmed surface 100 of the hedge is trimmed in multiple layers by the blades 3 of the plurality of sets of cutters 2 along the trimming direction. The hedge trimming cutter head of the invention arranges a plurality of groups of cutters 2 along the trimming direction, the blades 3 on two adjacent groups of cutters 2 are arranged in a staggered way in a layered way, the rotary cutting surfaces 200 of the two adjacent groups of cutters 2 are partially overlapped in the axial direction of the cutters 2, so that the rotary radius of the cutters 2 is maximized by using the limited installation space, the linear speed of the cutting edge of the blade 3 is improved, the tearing rate of trimmed hedges is reduced, a trimming vacuum zone does not exist between the two adjacent groups of cutters 2, the working efficiency is high, in addition, the initial cutting side of the rotary cutting surface 200 of the cutters is inclined towards the to-be-trimmed surface 100 of the hedges, so that the initial cutting sides of the plurality of groups of cutters 2 are positioned on the same plane, the branches on the same to-be-trimmed surface of the hedges are trimmed through the initial ends of the plurality of cutters 2, the hedges are ensured to be trimmed and to be crushed in a plurality of layers along the, so that the hedge trimming vehicle collects the broken branches and leaves.
As shown in fig. 5, the angle between the rotary cutting surface 200 of the cutter 2 and the surface 100 to be trimmed of the hedge is greater than 0 degree and not more than 15 degrees. When the hedge trimming cutter disc trims the horizontal surface of a hedge along the horizontal direction, the included angle between the rotation axis of the cutter 2 and the vertical direction is equal to the included angle between the rotary cutting surface 200 of the cutter and the surface 100 to be trimmed of the hedge, the starting ends of the rotary cutting surfaces 200 of the multiple groups of cutters trim the branches and leaves on the hedge from the same height, and simultaneously, the branches and leaves below the hedge to be trimmed are crushed in multiple levels along the trimming direction through the multiple groups of cutters 2. When the hedge trimming cutter disc trims the side of the hedge along the vertical direction, the included angle between the rotation axis of the cutter 2 and the horizontal direction is equal to the included angle between the rotary cutting surface 200 of the cutter and the surface 100 to be trimmed of the hedge, the starting ends of the rotary cutting surfaces 200 of the multiple groups of cutters trim the branches and leaves on the hedge from the same width, and simultaneously, the branches and leaves below the hedge to be trimmed are crushed in multiple levels along the trimming direction through the multiple groups of cutters 2. If the angle between the rotary cutting surface 200 of the cutter and the surface 100 to be trimmed of the hedge exceeds 15 degrees, the direction of the shearing force of the blade 3 on the cutter 2 is affected, and the trimming effect of the hedge is deteriorated.
As shown in fig. 5, the number of the blade 3 arrangement layers of the multiple sets of cutters 2 gradually increases from one layer to multiple layers from the rear of the trimming in the pre-trimming direction, and the blade 3 on the cutter 2 in the front of the trimming is located between two adjacent layers of blades 3 on the cutter 2 in the rear of the trimming. The volume of branches and leaves diminishes gradually after the pruning of multiunit cutter 2, prunes the rear and increases gradually to the multilayer from the one deck through the blade 3 that lays the number of piles with multiunit cutter 2 by pruning front direction to carry out multi-level pruning breakage with the branches and leaves of pruning, and the branches and leaves volume of pruning diminishes gradually, therefore branches and leaves can not block between multilayer blade 3 and influence the operation of hedgerow pruning blade dish. In this embodiment, two sets of cutters 2 are arranged on the cutter frame 1 along the trimming direction, the front cutter 2 is a single-layer blade 31, the rear cutter 2 is provided with multiple layers of blades 3, and the single-layer blade 31 of the front cutter 2 is inserted between the two lowest layers of blades 3 of the rear cutter 2. The single-layer blade 31 of the front cutter 2 primarily trims the surface 100 to be trimmed of the hedge, the lowermost blade 3 of the rear cutter 2 further trims the surface 100 to be trimmed of the hedge, and the rear upper multi-layer blade 3 multi-level crushes the branches and leaves trimmed by the front cutter 2 and the lowermost blade 3.
As shown in fig. 5 and 6, a layer of blades 3 is arranged on the cutter 2 in front of the trimming, and the edge surfaces of the layer of blades 3 face upwards; the cutter 2 positioned behind the trimming is provided with a plurality of layers of blades 3, the blade surfaces of the blades 3 at the top layer face downwards, and the blade surfaces of the blades 3 at the lower part of the top layer face upwards. Branches and leaves cut by the blade 3 with the upward edge face splash upwards, and branches and leaves cut by the blade 3 with the downward edge face move downwards. The branch and leaf which is cut off is splashed upwards by the blade 3 with the edge face facing upwards on the cutter 2 which is positioned in front of the cutting direction, and then falls back to the blade 3 for primary crushing. After the big branch and leaf that will tentatively prune down through the cutter 2 that is located the place ahead so circulatively carries out a lot of breakage, is driven to the cutter 2 department of rear by the cutter 2 rotation in place ahead, carries out further multi-level breakage through the multilayer blade 3 of rear cutter 2. Because the edge surfaces of the multi-layer blades 3 below the top layer on the rear cutter 2 are all upward, the edge surface of the top layer blade 34 is downward, branches and leaves are upward splashed after being crushed by the multi-layer blades 3 below, downward splashed after being crushed by the top layer blade 3, and the branches and leaves are further crushed in multiple layers in the rear cutter 2.
As shown in fig. 5 and 6, the trimming cutter assembly includes front cutters 21 and middle cutters 22 arranged along the trimming direction, the two front cutters 21 are respectively arranged at two sides in front of the middle cutter 22, and the two front cutters 21 are both rotated inwards along the trimming direction, so that branches and leaves trimmed by the two front cutters 21 meet at the middle cutter 22 for further crushing. The two front cutters 21 are single-layer blades 31, and the blade faces of the blades 3 face upwards. The middle cutter 22 is provided with a top layer blade 34, a middle layer blade 33 and a bottom layer blade 32. The top blade 34 faces downward and the middle and bottom blades 33, 32 face upward. The single-layer blade 31 on the front-side cutter 21 is interposed between the bottom-layer blade 32 and the middle-layer blade 33. The surface 100 to be trimmed of the hedge is primarily trimmed by the single-layer blade 31 on the front-side cutter 21, and the surface 100 to be trimmed of the hedge is further trimmed by the bottom-layer blade 32 on the middle cutter 22, so that the surface 100 to be trimmed of the hedge is trimmed more smoothly. Branches and leaves sheared by the single-layer blade 31 on the front-side cutter 21 splash upwards, fall back to the blade 3 again for crushing, large branches and leaves primarily sheared by the two front-side cutters 21 are circularly crushed for multiple times, and are driven to the middle cutter 22 at the middle rear part by the rotation of the two front-side cutters 21, and multi-level crushing is performed by the three-layer blade 3 of the middle cutter 22. Since the cutting surfaces of the middle blade 33 and the bottom blade 32 on the middle cutter 22 are both upward, the cutting surface of the top blade 34 is downward, branches and leaves splash upward after being crushed by the middle blade 33 and the bottom blade 32, and splash downward after being crushed by the top blade 3, so that the branches and leaves trimmed by the single-layer blade 31 on the front cutter 21 and the bottom blade 32 on the middle cutter 22 are further crushed multiple times in the middle cutter 22.
The cutter frame 1 is provided with a material guide plate for guiding branches and leaves trimmed by the cutter 2 positioned in front of trimming to the cutter 2 positioned behind trimming for further trimming. In this embodiment, the guiding plate extends from the beginning cutting side of the rotary cutting surfaces of the two front cutters 21 to the end intersection of the rotary cutting surfaces of the middle cutter 22, and the intersection is provided with a notch communicated with the branch and leaf collecting device of the hedge trimming operation vehicle.
As shown in fig. 7, the cutter 2 further includes a rotating disc 23 mounted on the cutter frame 1 and connected to the output end of the cutter driving mechanism 4, a shaft sleeve 24 for mounting the blades 3, and a fastening screw 25 for fixing the shaft sleeve 24 to the rotating disc 23, the plurality of blades 3 are arranged along the circumferential direction of the rotating disc 23, a flange edge is provided on the shaft sleeve 24, and the blades 3 are sleeved on the shaft sleeve 24 and located between the flange edge and the rotating disc 23; the fastening screw 25 is in threaded matching connection with the rotating disc 23 through the flange edge, and is limited in the axial direction of the fastening screw 25 through a fastening nut 26 and a spring washer 27, and the gap between the flange edge and the rotating disc 23 is larger than the thickness of the blade 3. The rotating disc 23 is provided with an installation groove matched with the shaft part of the shaft sleeve 24, and is positioned and installed in the installation groove through the shaft sleeve 24. Because the clearance between the flange edge and the rotary disk 23 is greater than the thickness of the blade 3, the blade 3 can rotate about the bushing 24. In the trimming operation, when the blade 3 rotating at a high speed contacts thick branches which can not be cut at one time, the blade 3 is forced to automatically rotate around the shaft sleeve 24 in the opposite direction until the thick branches are bypassed, and then the blade 3 is driven by the rotating disk 23 to rotate at a high speed again, so that the function of protecting the blade 3 is realized. The rotating disc 23 is screwed with the fastening screw 25 for fastening, and the fastening nut 26 and the spring washer 27 for anti-loosening.
As shown in fig. 4, the gas injection end of the high pressure gas injection mechanism 8 is lower than the highest point of the suction pipe 51, and the end surface of the gas injection end of the high pressure gas injection mechanism 8 is inclined toward the inside of the housing 5, so as to prevent the high pressure gas injected from the gas injection end of the high pressure gas injection mechanism 8 from flowing toward the outside of the housing 5. The end surface of the air injection end of the high-pressure air injection mechanism 8 is inclined towards the interior of the housing 5, so that high-pressure air injected from the air injection end of the high-pressure air injection mechanism 8 flows only towards the back of trimming and upwards, and the high-pressure air is prevented from flowing towards the exterior of the housing 5 to drive branches and leaves in the housing 5 to flow outwards. In this embodiment, the gas lances 82 are L-shaped. The high-pressure gas in the gas injection pipe 82 flows in the horizontal direction and is injected from the gas injection ports. Since the gas ejection port is inclined toward the inside of the housing 5 (i.e., obliquely upward), a part of the high-pressure gas ejected from the gas ejection port gradually flows obliquely upward after flowing in the horizontal direction for a certain distance.
As shown in fig. 3, the air injection end of the high-pressure air injection mechanism 8 is flush with the rotary cutting surface 200 of the cutter 2 or lower than the rotary cutting surface 200 of the cutter 2, and the air injection flow injected by the air injection end of the high-pressure air injection mechanism 8 forms a high-speed air curtain for preventing the trimmed and broken branches and leaves from falling out of the housing 5 at the rotary cutting surface 200 of the cutter 2 or below the rotary cutting surface 200. In this embodiment, the plurality of sets of cutters 2 are arranged along the trimming direction, and the initial cutting side of the rotation plane of the cutters 2 is inclined to the surface 100 of the hedge to be trimmed, so that the initial cutting sides of the plurality of sets of cutters 2 are located on the same plane, and the surface 100 of the hedge to be trimmed is trimmed in multiple levels along the trimming direction by the blades of the plurality of sets of cutters 2. The initial cutting side of the rotary cutting surface of the tool 2 is below or flush with the air jets. The air jet stream ejected through the air jet port drives the pruned branches and leaves to flow toward the suction pipe 51 along the pruning direction.
The flow rate of the high-pressure gas supply device is generally 20-50% of the flow rate of the suction device. If the flow of the high-pressure gas supply device is lower than 20% of the flow of the suction device, the flow velocity and the dynamic pressure of the gas sprayed by the gas spraying pipe 82 are low, the capability of blowing the branches and leaves to the effective suction area 300 is lost, and the phenomenon that the branches and leaves fall out of the housing 5 is caused; if the flow rate of the high-pressure gas supply device is higher than 50% of the flow rate of the suction device, the gas ejected from the gas ejecting pipe 82 cannot be completely sucked by the suction gas flow at the suction pipe 51, and the unabsorbed high-pressure gas overflows out of the housing 5, so that part of branches and leaves are carried out of the housing 5. In this embodiment, the high-pressure gas supply means includes a blower. The suction device comprises a suction fan.
As shown in fig. 8 and 9, in the hedge trimmer according to another embodiment, a flow guiding cavity 61 communicated with an input end of a suction device is partitioned by an inner cavity of a housing 5, and a bottom opening of the flow guiding cavity 61 is blocked by a rotation plane of a plurality of sets of cutters 2, air in an area below the flow guiding cavity 61 is sucked and ascended to the flow guiding cavity 61 by the suction device to form ascending flow, and then enters the flow guiding cavity 61 to form flow guiding, so that branches and leaves trimmed by the front cutters 2 flow into the flow guiding cavity 61 under the action of the ascending flow, and then the branches and leaves trimmed by the front cutters 2 are guided to the rear cutters 2 for further trimming and crushing by the flow guiding, and the crushed branches and leaves enter the suction device along with the flow guiding.
As shown in fig. 8, 9 and 10, in the hedge trimmer according to the present invention, the plurality of sets of cutters 2 are arranged along the trimming direction, the flow guiding cavity 61 communicated with the input end of the suction device is formed by partitioning the inner cavity of the housing 5, and the bottom opening of the flow guiding cavity 61 is blocked by the rotation plane of the plurality of sets of cutters 2, when the suction device sucks branches and leaves, air in the area below the flow guiding cavity 61 is sucked and ascended to the flow guiding cavity 61 to form an ascending flow, and then enters the flow guiding cavity 61 to form a flow guide, so that the branches and leaves trimmed by the front trimming cutter 2 are guided to the rear trimming cutter 2 to be further trimmed and crushed by the flow guide, and the crushed branches and leaves enter the suction device along with the flow guide, and therefore, the trimmed branches and leaves are guided by the flow guide formed in the flow guiding cavity 61, gradually prune the breakage with 2 through multiunit cutters, flow to suction device in through all leading with broken branches and leaves, at last by the suction to collection device in to avoid broken branches and leaves to drop outside, need not artifical the collection, and avoid broken branches and leaves to be detained in hedgerow trimming blade dish, guarantee hedgerow trimming blade dish's normal operating.
The inner cavity of the housing 5 is divided into a flow guiding cavity 61 by the flow guiding plate assembly 6, the flow guiding plate assembly 6 comprises a front flow guiding plate 62 positioned at the front edge of the trimming cutter assembly and a plurality of side flow guiding plates 63 connected with the front flow guiding plate 62, the side flow guiding plates extend to the position of the cutter 2 behind the trimming along the path of the cutter 2 in front of the trimming in a rotating and advancing mode in sequence and are connected with the front flow guiding plate 62 around the outer edge of the rotating plane of the cutter 2 behind the trimming, and therefore the flow guiding cavity 61 is formed in an enclosing mode. Optionally, the deflector assembly 6 is inclined or recessed towards the direction of the cutter 2, so that the branches and leaves to be trimmed are guided to the position of the cutter 2 by the deflector assembly 6 after contacting with the deflector assembly 6, and then the branches and leaves to be trimmed are trimmed.
The front cutting tool 2 is arranged outside the diversion cavity 61, and the front half of the rotation plane of the front cutting tool 2 is blocked below the diversion cavity 61. The cutter 2 after trimming is installed in the diversion cavity 61, and the rotation plane of the cutter 2 after trimming is completely sealed below the diversion cavity 61. The front half of the rotation plane of the cutter 2 in front of the pruning is used for primarily pruning branches and leaves, the primarily pruned branches and leaves enter the diversion cavity 61, and are further crushed in the positions of the cutter 2 in the rear of the pruning in the whole flow direction under the flow direction of the diversion, and the crushed branches and leaves are conveyed to the collecting device through the sucking device by adopting pneumatic conveying in the whole flow direction of the diversion.
The blade face of blade 3 on the cutter 2 of pruning the place ahead all up, the blade face of 3 blades of the superiors on the cutter 2 of pruning the rear is down, and 3 blade faces of other layers of blade all up, consequently, the branch and leaf after the pruning can upwards splash to in the water conservancy diversion cavity 61, and the branch and leaf still can receive the effort of upwelling simultaneously to guarantee that the branch and leaf can not drop downwards after the pruning.
As shown in fig. 8 and 11, the housing 5 encloses the trimming cutter assembly from the top and from the side to form a cavity with an open bottom, the bottom opening of the housing 5 is covered with a sealing plate assembly 7, and the sealing plate assembly 7 is located below the diversion output area in the diversion cavity 61, and the sealing plate assembly 7 cooperates with the bottom opening of the housing 5 to form a flow passage opening 52 for air entering the diversion cavity 61. The front edge of the flow opening 52 is located below the front edge of the flow directing cavity 61. The area of the flow-through port 52 is smaller than the area of the bottom surface of the guide cavity 61. Under the condition that the branch and the leaf are trimmed by the trimming cutter assembly, the closing plate assembly 7 is used for closing partial area of the bottom opening of the housing 5, so that the area of the overflowing opening 52 is as small as possible, the ascending flow and the flow guiding speed are improved, and the branch and the leaf in the flow guiding output area in the flow guiding cavity 61 can be prevented from falling. In this embodiment, the closing plate assembly 7 is used for shielding the lower part of the rear half-section area of the cutter 2 behind the pruning, so that the area of the overflowing opening 52 is reduced, the air flow speed of ascending flow at the overflowing opening 52 is improved, the pruned branches and leaves in the hedge pruning disc are effectively prevented from falling off, the flow guiding speed in the flow guiding cavity 61 is also improved, the airflow guiding is carried out on the branches and leaves in the flow guiding cavity 61 more quickly, and the branch and leaf pruning and crushing speed and the efficiency of conveying the smashed branches and leaves to the collecting device through the airflow are improved.
The guide plate assembly 6 comprises a front guide plate 62 and side guide plates 63, the front guide plate 62 is located in front of the two front side cutters 21, the two side guide plates 63 are respectively connected with two ends of the front guide plate 62, and respectively surround and intersect behind the middle cutter 22 along the paths of the two front side cutters 21 advancing to the middle cutter 22 in a rotating manner, and the intersection of the two side guide plates 63 is provided with a notch communicated with the input end of the suction device, so that the guide plate assembly is matched with the housing 5 to form a guide cavity 61 communicated with the input end of the suction device. The two side baffles 63 are respectively positioned at the inner sides of the two front cutters 21. The diversion cavity 61 is butterfly-shaped. The front and rear deflectors 62 and 62 are streamlined. The casing 5 is provided with a suction tube 51 for communicating the slot with the inlet of the suction device.
Shrouding subassembly 7 includes side seal board and well shrouding, shelter from the below of keeping away from the rotatory region of middle cutter 22 in two front side cutters 21 respectively through two side seal boards, shelter from the below in the back half-section region of middle cutter 22 through well shrouding, thereby reduce the area of mouth 52 that overflows, the air velocity of the mouth 52 department upwelling that overflows has been improved, prevent effectively that prunes the branch and leaf in the hedge pruning dish from dropping, the speed of water conservancy diversion in the water conservancy diversion cavity 61 has also been improved simultaneously, carry out the air current direction to the branch and leaf in the water conservancy diversion cavity 61 more fast, thereby the efficiency in broken branch and leaf to the collection device is carried to the air current of the broken branch and leaf of branch and leaf pruning speed and air current has been improved. The flow-through opening 52 is in the shape of a "B".
As shown in fig. 8 and 9, the front deflector 62 is a rubber soft plate. The rubber soft board has elastic deformation capability. When the branches and leaves to be pruned on the hedgerow extend to the front flow guiding plate 62, the front flow guiding plate 62 is pressed and deformed, so that the branches and leaves to be pruned further extend to the front side cutter 21 for pruning. Optionally, the front guide plate 62 is a rigid plate, and there is a space below the front guide plate 62 for branches and leaves to be trimmed to extend to the front side cutter 21. In this embodiment, the double-layer baffle formed by the rubber baffle 53 and the front baffle 62 at the upper inlet of the housing 5 effectively prevents the branches and leaves trimmed in the diversion cavity 61 from splashing from the front of the hedge trimming cutterhead, and improves the sealing property of the front end of the diversion cavity 61, thereby improving the effect of guiding the air flow of the branches and leaves in the diversion cavity 61 and the efficiency of conveying the broken branches and leaves into the suction device to the collecting device by the air force.
The hedge trimming working vehicle of the embodiment comprises the hedge trimming cutter head. The hedge trimming operation vehicle further comprises a suction device connected with the suction pipe 51 of the hedge trimming cutter, a collection device communicated with the output end of the suction device, a high-pressure gas supply device connected with the gas inlet end of the high-pressure gas injection mechanism 8 of the hedge trimming cutter, and a control device, wherein the control device is used for controlling the hedge trimming cutter to trim, controlling the suction device to suck and controlling the high-pressure gas supply device to deliver high-pressure gas to the high-pressure gas injection mechanism 8.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes 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 (10)
1. A hedge trimming cutter head comprises a cutter (2) for trimming and crushing branches and leaves on a surface (100) to be trimmed, a cutter frame (1) for mounting the cutter (2), a housing (5) covering the cutter (2) and a cutter driving mechanism (4) for driving the cutter (2) to rotate and cut, wherein the housing (5) is provided with a suction pipe (51) which is connected with an air inlet end of a suction device and is positioned behind the trimming of the cutter (2), and the suction pipe (51) forms suction airflow for sucking the branches and leaves trimmed and crushed in the housing (5) into a collection device under the suction action of the suction device,
it is characterized in that the preparation method is characterized in that,
the hedge trimmer also comprises a high-pressure air injection mechanism (8) which is arranged in the housing (5) and is connected with the air outlet end of the high-pressure air supply device, the air injection end of the high-pressure air injection mechanism (8) is positioned in front of the trimming of the cutter (2),
high-pressure gas is sprayed towards the back of pruning through the gas spraying end of the high-pressure gas spraying mechanism (8) to form gas spraying airflow for spraying the pruned and crushed branches and leaves in the housing (5) to the suction pipe (51), so that the pruned and crushed branches and leaves are quickly collected under the synergistic action of the gas sucking airflow and the gas spraying airflow.
2. A hedge trimmer cutter head according to claim 1,
the high-pressure air injection mechanism (8) comprises a conveying pipe (81) connected with an air outlet end of the high-pressure air supply device and an air injection pipe (82) communicated with the conveying pipe (81), and the air injection pipe (82) is positioned in front of the trimming of the cutter (2).
3. A hedge trimmer cutter head according to claim 2 wherein,
a plurality of gas injection pipes (82) communicate with the duct (81) to expand the flow area of the gas injection flow.
4. A hedge trimmer cutter head according to claim 3,
a plurality of conveying pipes (81) respectively extend to the inlet of the housing (5) along two sides of the housing (5),
a plurality of conveying pipes (81) are communicated and connected with the air outlet end of the same high-pressure gas supply device; or
The conveying pipes (81) are independently arranged and are respectively connected with the air outlet ends of different high-pressure gas supply devices.
5. A hedge trimmer cutter head according to claim 3,
the plurality of air injection pipes (82) are positioned at the inlet of the housing (5), and the plurality of air injection pipes (82) are distributed in a rake shape so as to comb branches and leaves on the surface to be trimmed (100) and guide the branches and leaves to extend into the cutter (2) for trimming and crushing.
6. A hedge trimmer cutter head according to claim 3,
the cutters (2) comprise front side cutters (21) and a middle cutter (22) which are arranged along the trimming direction, the two front side cutters (21) are a group of cutters (2) which are respectively arranged at the two sides of the front part of the middle cutter (22), the two front side cutters (21) both rotate inwards along the trimming direction,
the plurality of air injection pipes (82) are positioned at two sides of the housing (5) and inject high-pressure air towards the junction of the front side cutter (21) and the middle cutter (22), so that branches and leaves trimmed by the two front side cutters (21) are guided to be converged to the middle cutter (22) for further crushing.
7. A hedge trimmer cutter head according to claim 1,
the air injection end of the high-pressure air injection mechanism (8) is lower than the highest point of the suction pipe (51), and the end surface of the air injection end of the high-pressure air injection mechanism (8) inclines towards the inside of the housing (5) so as to prevent high-pressure air injected from the air injection end of the high-pressure air injection mechanism (8) from flowing towards the outside of the housing (5).
8. A hedge trimmer cutter head according to claim 1,
the air injection end of the high-pressure air injection mechanism (8) is flush with the rotary cutting surface (200) of the cutter (2) or lower than the rotary cutting surface (200) of the cutter (2), and the air injection airflow injected by the air injection end of the high-pressure air injection mechanism (8) forms a high-speed air curtain for preventing the trimmed and broken branches and leaves from falling out of the housing (5) at the rotary cutting surface (200) of the cutter (2) or below the rotary cutting surface (200).
9. A hedge trimmer cutter head according to claim 1,
the flow of the high-pressure gas supply device is 20-50% of the flow of the suction device.
10. A hedge trimming vehicle comprising a hedge trimmer according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011341602.5A CN112449902B (en) | 2020-11-25 | 2020-11-25 | Hedgerow trimming cutter head and hedgerow trimming operation vehicle |
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| CN202011341602.5A CN112449902B (en) | 2020-11-25 | 2020-11-25 | Hedgerow trimming cutter head and hedgerow trimming operation vehicle |
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| CN112449902B CN112449902B (en) | 2022-12-16 |
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| CN114223415A (en) * | 2021-12-09 | 2022-03-25 | 韩爱兰 | Afforestation is with afforestation trimming means |
| CN114667853A (en) * | 2022-04-06 | 2022-06-28 | 盐城工业职业技术学院 | Traction type trimming system for gardening tractor |
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|---|---|
| CN112449902B (en) | 2022-12-16 |
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