Spherical shrub trimmer with adjustable trimming radian

Abstract

The utility model relates to a spherical shrub trimmer with adjustable trimming radian, which is provided with a vehicle body, the vehicle body is provided with a spherical shrub trimming device, the spherical shrub trimming device comprises a plurality of circular saws and trimming arms used for installing the circular saws, the trimming arms are bent arms or folding arms, the bent arms adopt long-strip-shaped arc-shaped plates, and the arc-shaped plates are arranged on the vehicle body. The circular saw is installed on the arc-shaped plate, located on the inner side of the arc-shaped plate and distributed in the extending direction of the arc-shaped plate. The folding arm is provided with a plurality of connecting rods, the connecting rods are sequentially hinged, and the circular saws are arranged on the corresponding connecting rods respectively and located on the same side of the folding arm. The spherical shrub pruning machine is beneficial to simplifying the pruning process of spherical shrubs and improving the working efficiency.

Description

Technical Field

[0001] The utility model relates to a spherical shrub trimmer with adjustable trimming arc, belonging to the technical field of garden maintenance equipment. Background Art

[0002] In modern garden and municipal greening construction, shrubs are one of the important components. Shrubs have the characteristics of luxuriant branches and leaves and rapid growth, and their branches and leaves need to be pruned regularly. One common pruning method is to prune suitable spherical shrubs (or simply shrubs) such as red-leafed Photinia balls, tortoise shell holly balls, red flowered Loropetalum balls, and large-leafed Boxwood balls into a spherical or arc shape to enhance and maintain the aesthetic effect. However, the existing shrub pruning tools are long shears or hedge trimmers, and the cutting parts are all flat. In the process of pruning shrubs, in order to prune the shrubs into the target shape (spherical or arc-shaped), each point of the shrub branches and leaves (each small local area on the sphere or arc-shaped) needs to be carefully pruned (the contact between the cutting part and the shrub branches and leaves is similar to point contact) to complete the pruning work and achieve the beautification effect. The work intensity is high and it is time-consuming and labor-intensive.

[0003] For example, Chinese patent document CN117280957A discloses a vehicle-mounted multifunctional hedge trimmer, including a mechanical arm and a cutter head. The cutting line of the cutter head is a straight line. An extension arm is arranged between the cutter head and the end joint arm of the mechanical arm. One end of the extension arm is connected to the end joint arm through a rotating mechanism, and the other end is connected to the cutter head through an angle adjuster. The extension arm is a telescopic extension arm, and a telescopic mechanism is installed on the telescopic extension arm. Chinese patent document CN220986761U discloses a hedge trimmer for municipal gardens, comprising a mobile vehicle, a storage box and a trimming assembly, wherein a handrail for a person to hold is provided on one side of the mobile vehicle, and the storage box is placed on the mobile vehicle; the trimming assembly comprises a telescopic assembly, a transmission rod and a trimmer, wherein the telescopic assembly comprises a fixed cylinder and a lifting frame, wherein the fixed cylinder is fixedly mounted on the mobile vehicle, the lifting frame is slidably connected in the fixed cylinder, and is lifted and lowered by a driving assembly arranged in the fixed cylinder, wherein one end of the transmission rod is rotatably connected to the top of the lifting frame, and the other end is provided with a fixing ring for fixing and connecting to a housing of the trimmer, wherein the trimming height of the trimmer is adjusted by extending and retracting the telescopic assembly, and the trimming angle of the trimmer is adjusted by rotating the transmission rod, thereby the trimmer is used to perform plane repair at various heights and angles such as facades and top surfaces. Chinese patent document CN220897273U discloses a multifunctional hedge trimmer, comprising a mechanical arm mounted on a support of a vehicle body through a horizontal guide rail and a support, a circular saw being arranged at the end of the mechanical arm, the three mechanical arms being respectively hinged to the upper part of the front end support of the vehicle body, the front part of the front end support and the upper part of the rear end support of the vehicle body, and all being mounted on the support through the horizontal guide rail and the support; circular saws are arranged at the ends of the three mechanical arms, and the pruning blade thereof mainly comprises a blade head, an arm extension, a rotating mechanism and an angle adjustment mechanism, the blade head is composed of a stationary blade and a moving blade which cooperate with each other, the moving blade and the stationary blade both adopt flat blades, and a plurality of isosceles triangle cutting teeth are distributed on the blade sides, and shearing is performed by the cooperation of the cutting teeth of the moving and stationary blades. Chinese patent document CN116897715A discloses a vehicle-mounted hedge trimming device, comprising a mechanical arm and an adjustable main trimming assembly mounted on the moving end of the mechanical arm; wherein the adjustable main trimming assembly comprises a connecting seat mounted on the moving end of the mechanical arm, a main assembly seat mounted below the connecting seat, an eccentric main drive disc mounted at the bottom of the main assembly seat, a circular restraining groove one provided on a side of the eccentric main drive disc away from the main assembly seat, a connecting rod group one rotatably connected to the top of the main assembly seat and having an X-shaped structure, and a main circular saw assembly movably connected between one end of the connecting rod group and the eccentric main drive disc, wherein the inner cavity of the connecting rod group one is hollow; the vehicle-mounted hedge trimming device can adapt to hedge trimming operations of different areas, and can collect trimming debris in a centralized manner to avoid debris splashing and affecting the environment, and can trim three sides of the hedge at the same time, thereby greatly improving the trimming efficiency. Utility Model Content

[0004] The utility model aims to simplify the pruning process of spherical shrubs and improve work efficiency.

[0005] The technical solution of the utility model is: a spherical shrub pruning machine with adjustable pruning arc is provided with a body, a spherical shrub pruning device is provided on the body, the spherical shrub pruning device comprises a plurality of circular saws and pruning arms for installing the circular saws, the pruning arms are bent arms or folding arms, the bent arms adopt long arc-shaped (arc-shaped) plates, the circular saws are installed on the arc-shaped plates, are located on the inner side (arc inner side) of the arc-shaped plates, and are distributed along the extension direction of the arc-shaped plates; the folding arms are provided with a plurality of connecting rods, the connecting rods are hinged in sequence, the circular saws are respectively arranged on their corresponding connecting rods, and are located on the same side of the folding arms.

[0006] The vehicle body may be a cart, a column is mounted on the cart, a cantilever is mounted on the top of the column, and the arc panel is suspended at the outer end (or end) of the cantilever by a sling (or sling).

[0007] If necessary, a movable pulley and / or a static pulley cooperating with the suspension rope can be provided to form a pulley block with the suspension rope, so as to adjust the suspension height through the pulley block.

[0008] Preferably, the inner end of the cantilever is rotatably connected to the top end of the column (the rotation axis is the axis of the column).

[0009] Preferably, a lifting ring is provided at the outer end of the cantilever, a lifting ear (an annular structure identical or similar to the lifting ring) is provided on the outer side surface of the arc plate (the surface corresponding to the outer side of the arc, or the back side), and safety hooks are provided at both ends of the lifting rope, which are respectively connected to the lifting ring and the lifting ear through their own safety hooks.

[0010] Preferably, the arc plate is provided with an arc adjustment mechanism.

[0011] Preferably, a control button for driving the motor is provided on the arc plate.

[0012] Preferably, the column adopts a telescopic or non-telescopic structure, and the cantilever adopts a telescopic or non-telescopic structure.

[0013] Preferably, a hard protective net with a certain width is provided on both lateral sides (both sides in the width direction) or one side of the arc-shaped plate.

[0014] The vehicle body may be a motor vehicle, an operating arm is provided on the vehicle body of the motor vehicle, the folding arm is installed at the end of the operating arm, the operating arm and the folding arm are both mechanical arms, and the articulation between the connecting rods in the folding arm is through a rotating joint.

[0015] Preferably, each circular saw is provided with its own driving motor, the driving motor is fixedly mounted on its own corresponding connecting rod, and the circular saw is fixedly mounted on its own corresponding output shaft of the driving motor.

[0016] The beneficial effects of the utility model are:

[0017] 1) Since a number of circular saws are arranged with a bent arm or a folded arm, the circular saws can be distributed in an arc shape to form an arc-shaped cutting line. During the pruning of shrubs, the overall contact area between each circular saw and the branches and leaves of the shrubs is similar to an arc line. Only the shearing device needs to be moved, and the shrubs can be quickly partially pruned into a spherical or arc shape without detailed pruning. The shrub pruning process saves time and effort, and can effectively reduce the work intensity of the staff and improve work efficiency;

[0018] 2) Since the curved arm can be provided with an arc adjustment mechanism, the folding arm can adjust the angle between the connecting rods, and the overall distribution shape of the circular saw can be adjusted according to the actual conditions such as the target shape of the shrubs to be pruned and the height of the shrubs, so that it conforms to the target shape of the shrubs to be pruned, which can not only improve the accuracy of the pruning of the target shape of the shrubs and enhance the aesthetics of the pruned shrubs, but also help to speed up the pruning of the shrubs and improve work efficiency;

[0019] 3) Since there is only a small gap between the single-row circular saws, or the two rows of circular saws are staggered, the circular saws can be fully in contact with the shrubs within their distribution range during pruning, avoiding dead corners for pruning. At the same time, the precision of pruning can be further improved through manual movement or mechanical arm movement to ensure pruning quality;

[0020] 4) Since a circular saw is used as the pruning circular saw, the size and distribution of the circular saw can be selected according to actual needs to meet the pruning accuracy requirements. It is suitable for bidirectional pruning and is flexible to use;

[0021] 5) In this simple manual operation implementation method, a lifting rope is provided, which effectively reduces the labor intensity and ensures the flexibility of movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of an implementation method of the utility model;

[0023] Figure 2 It is a schematic diagram of another embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram (side view) of an embodiment of the utility model involving the distribution of circular saws on a curved arm;

[0025] Figure 4 It is a schematic diagram (front view) of an implementation mode of the utility model involving the distribution of circular saws on a curved arm. DETAILED DESCRIPTION

[0026] See also Figure 1-Figure 4 The pruning device mainly consists of a vehicle body (vehicle body) 10 and a spherical shrub pruning device (referred to as the pruning device). The vehicle body can be a human pushcart, a power-assisted vehicle, or a motor vehicle, which can be set according to actual needs. The pruning device is provided with a plurality of circular saws (or circular knives) 31 distributed in an arc shape, which are mounted on a pruning arm 30. The circular saws are driven to rotate by a driving motor 32 of the circular saws, so that each part within the arc range is pruned synchronously. The size and setting density of the circular saws can be based on actual needs.

[0027] The pruning arm should ensure the arc distribution of each circular saw. As an embodiment, the pruning arm adopts a curved arm 34, and the curved arm can be an arc-shaped curved plate, which can be called an arc plate. The circular saws are divided into one row or two rows, usually one row, and installed on the inner side of the arc plate. The circular saws in the same row are arranged along the arc extension direction of the arc plate, leaving a small gap between each other to avoid mutual interference or collision. The overall shearing area formed by each circular saw is arc-shaped. In the process of pruning shrubs, the overall contact mode between each circular saw and the branches and leaves of the shrubs is similar to line (arc) contact. Only the shearing device needs to be moved, and the shrubs can be quickly partially pruned into a spherical or arc shape without detailed pruning. The pruning process saves time and effort, and can effectively reduce the work intensity of the staff and improve work efficiency.

[0028] The arc-shaped plate is preferably made of steel plate, which has high structural strength and is not easily deformed without external force.

[0029] The circular saws are preferably arranged at equal intervals on the curved plate, and the spacing between adjacent circular saws is preferably no greater than 1 / 4 of the diameter of the circular saw. Generally, the spacing can be set small enough to ensure that adjacent circular saws do not interfere with each other when rotating, so as to facilitate operation.

[0030] When two rows of circular saws are provided, the two rows of circular saws can be staggered in the extension direction. In this case, the spacing between the circular saws in the same row can be appropriately increased, as long as the shearing areas of the two rows of circular saws in the extension direction of the arc plate overlap, the entire arc can be trimmed simultaneously.

[0031] As a preferred implementation, the arc plate is provided with an arc adjustment mechanism.

[0032] The curvature adjustment mechanism may include a matching screw 36 and a nut 37, wherein the nut is rotatably connected to the back of the arc plate, one end of the screw is hinged to the non-suspended end of the arc plate, and the other end is threadedly connected to the nut. When the curvature of the top area of ​​the arc plate needs to be increased, the nut is rotated so that the rear end side of the screw is screwed into the nut, and the curvature of the corresponding area of ​​the arc plate is increased by the outward (outer side direction of the arc plate) pulling force of the front end of the screw on the top of the arc plate; when the curvature of the top area of ​​the arc plate needs to be reduced, the nut is rotated in the opposite direction, and the curvature of the corresponding area of ​​the arc plate is reduced by the thrust of the front end of the screw on the top of the arc plate and the stress of the arc plate.

[0033] According to the operating habits, the above adjustment can also be achieved by rotating the screw to fix the nut. In this case, the nut is hinged to the back of the arc plate, one end of the screw is screwed (threaded) on the nut, and the other end of the screw is screwed to the screw seat. The screw seat is hinged to the front outer side wall of the circular saw mounting part. The rotation axis of the nut and the screw seat and the arc plate are both perpendicular to the arc plane of the arc plate (the plane where the arc is located, or the plane where the rotation axes of the circular saws in the same row are located). One end of the screw can be provided with a connection structure for sleeve handles or wrenches (for example, a regular hexagonal prism structure or a regular quadrangular prism structure). When adjustment is required, the screw is rotated with a handle or a wrench to increase or decrease the distance between the nut and the screw seat, thereby changing the bending state of the arc plate in the corresponding area.

[0034] The nut can be rotatably connected to the handle 33 (if a handle is provided) to facilitate setting and adjustment operations.

[0035] The screw rod, except for the area that needs to be threadedly connected with other parts (such as a nut), can be in a plain rod shape or a screw rod shape, depending on the convenience of processing and use.

[0036] The adjustable part of the curved plate should have corresponding elasticity.

[0037] Through the curvature adjustment mechanism, the curvature of the corresponding part of the arc plate can be adjusted according to the target shape of the shrub pruning and the height of the shrub, so that it can fit the target shape of the shrub pruning. This can not only improve the accuracy of pruning the target shape of the shrub and enhance the aesthetics of the shrub after pruning, but also help to speed up the shrub pruning and improve work efficiency.

[0038] The two side edges of the arc plate along its width direction are preferably located outside the blade (saw teeth) of the circular saw on the corresponding side, that is, the width of the arc plate is greater than the sum of the width of the two rows of circular saws and the spacing between the two rows of circular saws, and the two rows of circular saws are installed between the two side edges of the arc plate along its width direction. In this way, the two side edges of the arc plate along its width direction can protect the circular saw, which can not only prevent the circular saw from being damaged due to collision, but also prevent the circular saw from causing damage to the surrounding people or objects due to scratches. If necessary, a hard protective net with a certain width can also be set on the two lateral sides (both sides in the width direction) or one side of the arc plate to block branches or other debris that may fly toward the operator (towards the back of the arc plate) during work.

[0039] As another embodiment, the trimming arm may also be a folding arm. The folding arm is formed by hingedly connecting a number of short rods (which may be called connecting rods) in sequence. The circular saws are installed on the corresponding connecting rods. Usually, only one circular saw is arranged on the same connecting rod. Two circular saws may be arranged when appropriate. When two circular saws are arranged, the two circular saws may be staggered by a certain distance in the longitudinal direction (along the extending direction of the connecting rod) and the transverse direction (perpendicular to the extending direction of the connecting rod). The circular saws on each connecting rod are located on the same side of the trimming arm. By bending the folding arm, each circular saw is distributed on an arc (when one circular saw is arranged on the connecting rod) or on two arcs (when two circular saws are arranged on the connecting rod). The trimming effect thus produced is similar to that of a circular saw installed on a curved plate, but the folding arm form can flexibly adjust the degree of bending to adapt to trimming effects of different arcs.

[0040] According to actual needs, a locking device (for example, a threaded locking device) can be provided at the hinge between adjacent connecting rods. When the angle between the two connecting rods needs to be adjusted, the locking device is loosened, and after the angle between the two connecting rods is adjusted, the locking device is locked to fix the two connecting rods.

[0041] A multi-dimensional (multi-link) robotic arm may be used as the above-mentioned folding arm to achieve automatic control and adjustment of the shape of the folding arm.

[0042] As a simple implementation, a rickshaw (e.g., a cart) or a power-assisted cart (a rickshaw with mechanical assistance) can be used as the vehicle body, or a simple garden motor vehicle can be used as the vehicle body. For example, the cart can be provided with a bottom plate, wheels are provided at the four corners of the bottom surface of the bottom plate, and a handle is provided at the rear of the bottom plate.

[0043] The cart may be provided with a column 22, a cantilever 23 is provided at the top of the column, and the pruning device is suspended at the outer end of the cantilever by a suspension rope 24. The column and the cantilever together constitute an operating arm (or mobile arm) 20 of the pruning device. The bottom of the column may be rotatably mounted on the cart by a turntable mechanism (a rotating pair arranged at the bottom) 21, so as to adjust the direction of the cantilever.

[0044] The cantilever is usually a horizontal cantilever, and the connection with the column can be a rotational connection (especially when the bottom of the column is fixedly mounted on the vehicle body) to allow the cantilever to rotate horizontally and turn the trimming device to a desired position. For example, a cantilever connecting shaft extending vertically downward can be provided at the inner end of the cantilever (the end connected to the column), and the cantilever connecting shaft can be installed on the top of the column through a bearing. For example, a bearing seat with a bearing embedded therein is provided at the top of the column, and the cantilever connecting shaft is fixedly plugged into the bearing (on the inner ring of the bearing). Other suitable forms of revolute pairs can also be used to achieve the rotational connection between the inner end of the cantilever and the top of the column.

[0045] The outer end of the cantilever is provided with a lifting ring, the outer side of the arc plate (the outer side of the arc, or the back side) is provided with a lifting ear (a ring structure that is the same as or similar to the lifting ring), and both ends of the lifting rope are provided with safety hooks, and the lifting ring and the lifting ear are respectively connected through the corresponding safety hooks, thereby realizing the suspension of the pruning device. The safety hook is a hook-shaped connector used to connect ropes, flat belts and anchor points, equipment, etc., and has a locking function, for example, a self-locking spring hook. This rope connection method can facilitate the replacement of the pruning device to adapt to the pruning of different tree shapes.

[0046] The column may adopt a telescopic or non-telescopic structure, and the cantilever may adopt a telescopic or non-telescopic structure to adapt to different actual needs.

[0047] A storage box for tools and other items can be provided on the vehicle body. Pruning devices and other tools of different shapes can be placed in the storage box. The storage box can also be used as a counterweight for the vehicle body to achieve balance / stability of the vehicle body. If necessary, a special counterweight can be placed in the storage box.

[0048] The positions of various on-board devices such as pillars and storage boxes (if any) on the vehicle body (body, or vehicle panel, etc.) should be reasonably set to achieve force (torque) balance and ensure vehicle stability.

[0049] The lifting lug can be arranged on the back side of the suspension end of the arc-shaped plate (the end of the arc-shaped plate where the suspension rope is connected, and the other end can be called the non-suspension end).

[0050] A handle 33 may be provided on the back of the middle portion (or the non-suspended end region of the middle portion) of the arc-shaped plate so that the pruning device can be moved by holding the handle to achieve the desired pruning operation. Since the pruning device is suspended on the cantilever, the sling carries the gravity of the pruning device, and the operator basically only needs to control the position and posture of the pruning device, thereby greatly reducing the labor intensity of the operator compared to the handheld device.

[0051] The handle can be arc-shaped, with two ends respectively fixedly connected to the back of the arc-shaped plate, and a required distance for holding is left between the middle part and the arc-shaped plate.

[0052] A handle 35 may also be provided at the end surface of the suspension end of the arc plate, and the handle may be in a strip shape (e.g., a straight rod shape). If necessary, the operator may use the handle or use the handle and the grip at the same time to operate the trimming device.

[0053] A baffle extending toward the inner side of the arc-shaped plate may be provided on the top of the handle to prevent workers from accidentally touching the circular saw and causing cuts when operating the handle.

[0054] Lifting ears may also be provided at other different positions on the back of the arc-shaped plate, so as to allow the user to select the lifting ears at appropriate positions for hanging according to actual needs.

[0055] The cantilever may be provided with a hook that is shaped like the handle. When necessary, the trimming device (or the curved plate) may be hung on the hook through the handle, so that the trimming device may be less likely to shake during the process of pushing the vehicle body or in other situations.

[0056] Each circular saw may be provided with a driving motor, or multiple circular saws may be driven by the same driving motor. When each circular saw adopts a driving motor, the driving motor may be fixedly mounted on the back of the arc plate, and its output shaft passes through the corresponding through hole on the arc plate (a connecting bearing may be provided between the two, or only an annular gap may be provided), and the circular saw is fixedly mounted on the output shaft of the corresponding driving motor.

[0057] Each drive motor may be provided with a motor cover to prevent branch and leaf debris from contacting the drive motor or water and debris from contacting the drive motor during shrub pruning, causing it to malfunction.

[0058] The drive motor can be selected according to actual needs. For example, when a DC motor of appropriate power is used, a DC power supply device can be installed on the vehicle body, and the drive motor is powered by energy storage elements such as a battery pack in the DC power supply device. A socket for connecting to an external power supply can be provided on the curved plate, and the output wire of the power supply device is plugged into the socket when in use to connect the battery to the drive motor. When a high-energy storage battery is used or in other appropriate circumstances, the battery used as the power supply for the drive motor can also be placed at the bottom of the curved plate or in the handle for easy replacement or charging.

[0059] A control button for the drive motor can be provided at a suitable position of the arc plate (including the handle and the grip), and each drive motor (when there are several drive motors) can be connected to the same power circuit, and a power control switch can be provided on the power circuit so that the power control switch can be controlled by the same button, thereby controlling each drive motor to work synchronously. The layout of the power supply line and the power control switch can be realized according to the existing technology.

[0060] As an implementation method with a high degree of automation, the vehicle body is a motor vehicle, and a mechanical arm 26 used as an operating arm is provided on the motor vehicle. The end of the mechanical arm used as the operating arm is connected to a mechanical arm 38 used as a trimming arm through a rotary joint (the axis of rotation is the extension direction of the corresponding end connecting rod) 27. Since both the operating arm and the trimming arm are mechanical arms, and the articulation between the connecting rods in the trimming arm is through a rotary joint connection, the control and manipulation of the operating arm and the folding arm can be achieved based on the existing mechanical arm technology.

[0061] A circular saw may be arranged on each connecting rod, and each circular saw is provided with its own driving motor. The driving motor may be fixedly mounted on the corresponding connecting rod, and the circular saw is fixedly mounted on the output shaft of the driving motor.

[0062] The drive motor can be directly fixedly connected to one side of the connecting rod, or can be fixedly installed on one side of the connecting rod through a bracket or a mounting plate. The drive motor and the circular saw can be arranged on the same side of the connecting rod, or can be arranged on opposite sides. When the drive motor and the circular saw are respectively arranged on both sides of the connecting rod (folding arm), a through hole for passing the output shaft of the drive motor can be arranged on the connecting rod, or the installation positions of the drive motor and the circular saw on the connecting rod can be appropriately offset so that the output shaft of the drive motor passes through one side of the connecting rod.

[0063] The folding arm and the operating arm can adopt any suitable existing technology, and each joint used can be selected from existing mechanical arm joints. A control device can be set according to the existing technology to control the mechanical arm used as the folding arm, the mechanical arm used as the operating arm and each driving motor, and the action requirements and working states of each mechanical arm and driving motor are set according to corresponding operation requirements.

[0064] Unless otherwise specified or one preferred or optional technical means is a further limitation of another technical means, all preferred and optional technical means disclosed in the present utility model can be arbitrarily combined to form several different technical solutions.

Claims

1. A spherical bush trimmer with adjustable trimming arc, comprising a body, a spherical bush trimmer device, and the like, wherein: The spherical shrub pruning device includes a plurality of circular saws and a pruning arm for mounting the circular saws. The pruning arm is a bent arm or a folding arm. The bent arm adopts a long arc plate. The circular saw is mounted on the arc plate, located on the inner side of the arc plate and distributed along the extension direction of the arc plate. The folding arm is provided with a plurality of connecting rods, which are hinged in sequence. The circular saws are respectively arranged on their corresponding connecting rods and are located on the same side of the folding arm.

2. The spherical shrub trimmer with adjustable trimming arc as claimed in claim 1, characterized in that The vehicle body is a cart, a column is installed on the cart, a cantilever is installed on the top of the column, and the arc-shaped plate is suspended on the outer end of the cantilever through a suspension rope.

3. The spherical shrub trimmer with adjustable trimming arc as claimed in claim 2, characterized in that The inner end of the cantilever is rotatably connected to the top end of the column.

4. The spherical shrub trimmer with adjustable trimming arc as claimed in claim 2, characterized in that A lifting ring is arranged at the outer end of the cantilever, a lifting lug is arranged on the outer side surface of the arc-shaped plate, and safety hooks are arranged at both ends of the lifting rope, which are respectively connected to the lifting ring and the lifting lug through their own safety hooks.

5. The spherical shrub trimmer with adjustable trimming arc as claimed in claim 2, characterized in that The arc plate is provided with a control button for driving the motor.

6. The spherical shrub trimmer with adjustable trimming arc as claimed in claim 2, characterized in that The column adopts a telescopic or non-telescopic structure, and the cantilever adopts a telescopic or non-telescopic structure.

7. A spherical shrub trimmer with adjustable trimming arc as claimed in any one of claims 2 to 6, characterized in that The arc plate is provided with an arc adjustment mechanism.

8. A spherical shrub trimmer with adjustable trimming arc as claimed in any one of claims 2 to 6, characterized in that A hard protective net with a certain width is provided on both lateral sides or one side of the arc-shaped plate.

9. The spherical shrub trimmer with adjustable trimming arc as claimed in claim 1, characterized in that The vehicle body is a motor vehicle, an operating arm is provided on the vehicle body of the motor vehicle, the folding arm is installed at the end of the operating arm, the operating arm and the folding arm are both mechanical arms, and the articulation between the connecting rods in the folding arm is through a rotating joint.

10. The spherical shrub trimmer with adjustable trimming arc as claimed in claim 9, characterized in that Each circular saw is provided with its own driving motor, and the driving motor is fixedly mounted on its own corresponding connecting rod, and the circular saw is fixedly mounted on its own corresponding output shaft of the driving motor.

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