CN220606669U - Heavy hedge trimmer - Google Patents

Abstract

The utility model relates to the technical field of vegetation pruning, in particular to a heavy hedge trimmer, which comprises a base, wherein a fixing frame is rotatably arranged on the base, one end of the fixing frame is axially rotatably provided with a large arm, a telescopic arm is slidably arranged in the large arm, one end of the telescopic arm is rotatably provided with a folding arm, and one end of the folding arm is axially rotatably provided with a cutter frame arm; the high-speed motor is arranged on the cutter frame arm in a linear array mode, a fixing seat is fixedly arranged at the output end of the high-speed motor, a fixing pin is slidably arranged on the fixing seat, and a blade is movably arranged on the fixing seat. According to the heavy hedge trimmer provided by the utility model, the fixing frame, the telescopic arm, the large arm and the knife rest arm of the base are used for adjusting the angle of the control blade, the blade can be adjusted at any angle, and the blade of the high-speed motor on the knife rest arm is fixed through the fixing seat and the fixing pin and is quickly replaced.

Description

Heavy hedge trimmer

Technical Field

The utility model relates to the technical field of vegetation pruning, in particular to a heavy hedge trimmer.

Background

Most of the existing hedge trimming is realized by a trimming device, and hedges can be quickly trimmed by using the trimming device, for example, the following technologies are adopted:

reference is made to publication (bulletin) No.: CN215683527U, publication (date): 2022-02-01 discloses a hedge trimmer, including frame, blade and mount, the blade is connected with the mount, and the blade is detachable, the frame is connected with two mounts, through hinged joint between two mounts that are connected with the frame, be equipped with adjusting bolt on the hinge, the one end of mount has at least one mount through fixing bolt external connection, the below fixedly connected with hydraulic lift of frame.

In the prior art including above-mentioned patent, above-mentioned height-adjusting through hydraulic lift, and the mount of blade can adjust the angle and prune, but two mounts of foretell can't carry out by a wide margin regulation, if the contained angle between two mounts is too little, can make comparatively two adjacent blades bump on two mounts, and the blade passes through the nut to be fixed, leads to the blade to bump and damages the back and change the speed and slow down.

Disclosure of Invention

The object of the present utility model is to provide a heavy hedge trimmer for solving the above mentioned problems.

In order to achieve the above object, the present utility model provides the following technical solutions: a heavy hedge trimmer comprising:

the base is rotatably provided with a fixing frame, one end of the fixing frame is axially rotatably provided with a large arm, a telescopic arm is slidably arranged in the large arm, one end of the telescopic arm is rotatably provided with a folding arm, and one end of the folding arm is axially rotatably provided with a cutter frame arm;

the high-speed motor is arranged on the cutter frame arm in a linear array mode, a fixing seat is fixedly arranged at the output end of the high-speed motor, a fixing pin is slidably arranged on the fixing seat, a blade is movably arranged on the fixing seat, and the blade is matched with the fixing pin in a clamping mode.

Preferably, a hydraulic station is fixedly arranged on the fixing frame, a generator is fixedly arranged on the fixing frame, and the hydraulic station is electrically matched with the generator;

a lifting oil cylinder is arranged between the fixing frame and the large arm, a rotary oil cylinder is arranged between the base and the fixing frame, a folding arm oil cylinder is arranged between the telescopic arm and the folding arm, and a cutter head front-rear oil cylinder is arranged between the folding arm and the cutter rest arm;

the hydraulic station is matched with the rotary oil cylinder, the lifting oil cylinder, the folding arm oil cylinder and the front and rear oil cylinders of the cutter head.

Preferably, one end of the large arm is symmetrically and fixedly provided with a folding arm rotary disc, and the folding arm is positioned in the folding arm rotary disc to rotate;

and a wire groove rail is fixedly arranged on the big arm and the telescopic arm.

Preferably, a fixed bracket which is arranged in a linear array is fixedly arranged on the cutter frame arm, and the high-speed motor is arranged on the fixed bracket in a threaded manner;

an L-shaped frame is fixedly arranged on the fixed seat, and elastic pressing plates are symmetrically and fixedly arranged on the fixed pins;

the fixed seat is provided with a fixed groove, the fixed seat is symmetrically provided with sliding grooves, the elastic pressing plate is arranged in the sliding grooves in a sliding mode, and the output end of the high-speed motor is fixedly arranged in the fixed groove.

Preferably, the fixing pins are fixedly provided with fixing rods which are arranged in a circumferential array, and one end of each fixing pin is fixedly provided with a fixing block;

the L-shaped frame is provided with first fixing holes, and is provided with second fixing holes which are arranged in a circumferential array;

the cutter blade is provided with a third fixing hole, and a fourth fixing hole which is arranged in a circumferential array;

the fixed rod penetrates through the second fixed hole and is matched with the second fixed hole in a clamping mode, and the fixed block penetrates through the third fixed hole and is matched with the first fixed hole in a clamping mode.

Preferably, the fixing pin is fixedly provided with a T-shaped rod;

the clamping groove is formed in the fixing block, the annular groove is formed in the fixing block, the T-shaped rod extends into the clamping groove, the rotating block is arranged on the T-shaped rod in a sliding mode, and the clamping groove is matched with the rotating block in a clamping mode.

Preferably, the rotating block is symmetrically and fixedly provided with a pushing plate, the annular groove is symmetrically and fixedly provided with an elastic plate, and one end of the pushing plate is in tangential fit with the elastic plate;

elastic sliding blocks are symmetrically arranged in the fixed blocks in a sliding mode, the elastic sliding blocks are matched with the elastic plates, and the elastic sliding blocks are matched with the L-shaped frames in a clamping mode.

Preferably, the cutter frame arms are symmetrically and fixedly provided with motor protection covers, the cutter frame arms are fixedly provided with guide plates which are arranged in a linear array, and the cutter protection covers are symmetrically and fixedly arranged on the cutter frame arms.

In the technical scheme, the heavy hedge trimmer provided by the utility model has the following beneficial effects: the angle of the blade is controlled through the fixing frame, the telescopic arm, the large arm and the cutter frame arm of the base, so that the blade can be adjusted at any angle, and meanwhile, the blade of the high-speed motor on the cutter frame arm is quickly detached through the fixing seat and the fixing pin, so that the quick replacement of the blade is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic view of the overall structure provided by an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a driving assembly according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a fixing seat according to an embodiment of the present utility model;

fig. 4 is a schematic cross-sectional structure of a fixing seat according to an embodiment of the present utility model;

fig. 5 is an enlarged schematic view of a portion a according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of a fixing pin according to an embodiment of the present utility model;

fig. 7 is a schematic cross-sectional view of a fixing pin according to an embodiment of the present utility model;

fig. 8 is a schematic structural view of a blade according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a base; 2. a generator; 3. a distribution box; 4. a fixing frame; 5. a rotary oil cylinder; 6. a large arm; 7. a cutter frame arm; 8. a high-speed motor; 9. a blade; 51. a lifting oil cylinder; 52. an arm folding oil cylinder; 53. front and rear cylinders of the cutter head; 61. a telescoping arm; 62. a folding arm rotary disc; 63. wire slot rail; 64. folding arm; 82. a fixing seat; 83. an elastic pressing plate; 84. a fixed block; 85. an elastic sliding block; 86. a chute; 87. a fixed rod; 88. a rotating block; 89. a clamping groove; 91. a third fixing hole; 92. a fourth fixing hole; 101. a motor protection cover; 102. a fixed bracket; 103. a guide plate; 104. a cutter protecting cover; 821. a fixing groove; 822. an L-shaped frame; 823. a first fixing hole; 824. a second fixing hole; 831. a fixing pin; 832. a T-shaped rod; 841. an elastic plate; 842. a ring groove; 881. pushing the plate.

Detailed Description

In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1-8, a heavy hedge trimmer comprising:

the base 1, the base 1 is rotatably provided with a fixing frame 4, one end of the fixing frame 4 is axially rotatably provided with a large arm 6, a telescopic arm 61 is slidably arranged in the large arm 6, one end of the telescopic arm 61 is rotatably provided with a folding arm 64, and one end of the folding arm 64 is axially rotatably provided with a tool rest arm 7;

the high-speed motor 8 is arranged on the cutter frame arm 7 in a threaded mode and is arranged on the cutter frame arm 7 in a linear array mode, a fixing seat 82 is fixedly arranged at the output end of the high-speed motor 8, a fixing pin 831 is arranged on the fixing seat 82 in a sliding mode, a cutter blade 9 is movably arranged on the fixing seat 82, and the cutter blade 9 is matched with the fixing pin 831 in a clamping mode.

Specifically, as can be seen from fig. 1, the large arm 6, the telescopic arm 61, the folding arm 64 and the cutter rest arm 7 can be driven to rotate integrally by rotating the fixing frame 4, the large arm 6 slides in the fixing frame 4 and the telescopic arm 61 in the large arm 6, the hedge height can be trimmed by the adjusting device, the bending angle of the cutter rest arm 7 can be adjusted by the folding arm 64, and the trimming angle of the blade 9 on the high-speed motor 8 can be controlled by the cutter rest arm 7.

Secondly, as can be seen from fig. 2, the blade 9 is fixed by the fixing pin 831 on the fixing seat 82, and is driven by the output end of the high-speed motor 8, so that the blade 9 is trimmed, and meanwhile, when the use time is too long and needs to be changed, the blade 9 can be changed by releasing the clamping state of the fixing pin 831 and the blade 9, and a new blade 9 can be used after being clamped with the fixing pin 831 again.

In the above technical scheme, the angle of the blade 9 is controlled through the fixing frame 4, the telescopic arm 61, the large arm 6 and the cutter frame arm 7 of the base 1, so that the blade 9 can be adjusted at any angle, and meanwhile, the blade 9 of the high-speed motor 8 on the cutter frame arm 7 is quickly detached through the fixing seat 82 and the fixing pin 831, so that the quick replacement of the blade 9 is improved.

As a further provided embodiment of the present utility model, a hydraulic station is fixedly arranged on the fixing frame 4, a generator 2 is fixedly arranged on the fixing frame 4, a distribution box 3 is fixedly arranged on the fixing frame 4, the hydraulic station is electrically matched with the generator 2, and the distribution box 3 is matched with the generator 2;

a lifting oil cylinder 51 is arranged between the fixed frame 4 and the large arm 6, a rotary oil cylinder 5 is arranged between the base 1 and the fixed frame 4, a folding arm oil cylinder 52 is arranged between the telescopic arm 61 and the folding arm 64, and a cutter head front-rear oil cylinder 53 is arranged between the folding arm 64 and the cutter rest arm 7;

the hydraulic station is matched with the rotary oil cylinder 5, the lifting oil cylinder 51, the folding arm oil cylinder 52 and the front and rear cutter head oil cylinder 53.

Secondly, one end of the large arm 6 is symmetrically and fixedly provided with a folding arm rotary disc 62, and a folding arm 64 is positioned in the folding arm rotary disc 62 to rotate;

the large arm 6 and the telescopic arm 61 are fixedly provided with a wire slot rail 63.

Specifically, as can be seen from fig. 1, the generator 2 performs electric power distribution through the distribution box 3, drives the hydraulic station to drive the rotary oil cylinder 5, the lifting oil cylinder 51, the folding arm oil cylinder 52 and the front and rear cutter head oil cylinder 53 to work through electric power, so that the fixing frame 4, the large arm 6, the telescopic arm 61, the folding arm 64 and the cutter frame arm 7 perform linkage work, the folding arm 64 can rotate in the horizontal direction through the cooperation of the two folding arm rotary discs 62 and the folding arm oil cylinder 52, the folding arm 64 can be enabled to rotate in the horizontal direction, the equipment is ensured to be suitable for angles required by trimming of various hedges, and meanwhile, the control lines extending from the hydraulic station are stored through the wire slot rails 63, and the cleanliness of the equipment is maintained.

As a further provided embodiment of the present utility model, the fixed support 102 arranged in a linear array is fixedly arranged on the cutter frame arm 7, and the high-speed motor 8 is arranged on the fixed support 102 in a threaded manner;

an L-shaped frame 822 is fixedly arranged on the fixing seat 82, and elastic pressing plates 83 are symmetrically and fixedly arranged on the fixing pins 831;

the fixed seat 82 is provided with a fixed slot 821, the fixed seat 82 is symmetrically provided with a sliding slot 86, the elastic pressing plate 83 is arranged in the sliding slot 86 in a sliding way, and the output end of the high-speed motor 8 is fixedly arranged in the fixed slot 821

Secondly, fixing rods 87 which are arranged in a circumferential array are fixedly arranged on the fixing pins 831, and fixing blocks 84 are fixedly arranged at one end of the fixing pins 831;

the L-shaped frame 822 is provided with a first fixing hole 823, and the L-shaped frame 822 is provided with a second fixing hole 824 which is arranged in a circumferential array;

the cutter blade 9 is provided with a third fixing hole 91, and the cutter blade 9 is provided with a fourth fixing hole 92 which is arranged in a circumferential array;

the fixing rod 87 penetrates through the second fixing hole 824 and is in clamping fit with the second fixing hole 824, and the fixing block 84 penetrates through the third fixing hole 91 and is in clamping fit with the first fixing hole 823.

Further, a T-shaped rod 832 is fixedly provided on the fixing pin 831;

the fixed block 84 is provided with a clamping groove 89, the fixed block 84 is internally provided with a ring groove 842, the T-shaped rod 832 extends into the clamping groove 89, the T-shaped rod 832 is provided with a rotating block 88 in a sliding manner, and the clamping groove 89 is matched with the rotating block 88 in a clamping manner.

Further, a pushing plate 881 is symmetrically and fixedly arranged on the rotating block 88, an elastic plate 841 is symmetrically and fixedly arranged in the ring groove 842, and one end of the pushing plate 881 is in tangential fit with the elastic plate 841;

the fixed block 84 is internally and symmetrically provided with an elastic sliding block 85 in a sliding manner, the elastic sliding block 85 is matched with the elastic plate 841, and the elastic sliding block 85 is matched with the L-shaped frame 822 in a clamping manner.

Specifically, as can be seen from fig. 1 to 4, the plurality of high-speed motors 8 are mounted on the cutter frame arm 7 through the threads of the plurality of fixing brackets 102, so that the high-speed motors 8 can be firmly mounted on the cutter frame arm 7, and when the cutter blade 9 is mounted, a new cutter blade 9 can be placed on the L-shaped frame 822 of the fixing seat 82, the third fixing hole 91 and the three fourth fixing holes 92 of the cutter blade 9 are respectively aligned with the first fixing hole 823 and the three second fixing holes 824 of the L-shaped frame 822, and after the alignment, the two elastic plates 841 are pressed down, so that the fixing pins 831 are driven to slide towards the cutter blade 9.

Next, as can be seen from fig. 2 to fig. 5, the two elastic pressing plates 83 are located in the sliding grooves 86 to slide from a low position to a high position (as can be seen from fig. 4, the top of the fixing seat 82 is in a low position, and the bottom surface of the L-shaped frame 822 is in a high position), when the two elastic pressing plates 83 move to a high position, the fixing pins 831 are attached to the blade 9 from the fixing seat 82, at this time, the three fixing rods 87 are fastened in the three second fixing holes 824 through the three fourth fixing holes 92, and the fixing blocks 84 are fastened with the first fixing holes 823 through the third fixing holes 91.

Further, as can be seen from fig. 5 to 8, since the length of the fixing block 84 is greater than the depth of the first fixing hole 823, when the fixing block 84 is fastened to the first fixing hole 823, a portion of the fixing block 84 extends out of the L-shaped frame 822, and at this time, the rotating block 88 is rotated so that the two pushing plates 881 rotate in the ring groove 842 following the rotating block 88, and the two pushing plates 881 are in contact with the two elastic plates 841 when rotating, and continuously rotate through the two pushing plates 881 so that the two pushing plates 881 abut against the two elastic plates 841.

Further, as can be seen from fig. 5 to 8, the two elastic plates 841 push the two elastic sliding blocks 85 to extend outwards from the inside of the fixed block 84, and then push the rotating block 88 to insert into the clamping groove 89, so as to clamp and fix the two pushing plates 881, and keep the abutting state of the two pushing plates 881 and the two elastic plates 841, so that the two elastic sliding blocks 85 and the L-shaped frame 822 are in a clamped state.

In the last step, as can be seen from fig. 2 to 7, when the blade 9 needs to be replaced, the clamping state of the rotating block 88 is released, the two pushing plates 881 are driven to release the pushing of the two elastic plates 841, so that the two elastic plates 841 are reset, the two elastic sliding blocks 85 release the application of pressure, the springs of the elastic sliding blocks 85 restore to the initial state and retract into the fixed block 84, the restoring of the elastic sliding blocks 85 releases the clamping state of the fixed block 84 and the L-shaped frame 822, at the moment, the springs of the two elastic pressing plates 83 at the two sides of the fixed pin 831 are compressed and deformed to restore the initial state, the fixed pin 831 is driven to move downwards, the fixed seat 82 is retracted, and the clamping of the three fixed rods 87 and the fixed block 84 to the blade 9 is released, so that the blade 9 which needs to be replaced can be removed.

As an embodiment of the present utility model, the motor protection cover 101 is symmetrically and fixedly arranged on the tool rest arm 7, the guide plate 103 arranged in a linear array is fixedly arranged on the tool rest arm 7, and the tool protection cover 104 is symmetrically and fixedly arranged on the tool rest arm 7.

Specifically, as can be seen from fig. 1, the guide plate 103 can avoid the clearance between the blades 9 and 9 during the operation of the device, so as to ensure the flatness after cutting, and meanwhile, the cutter protection cover 104 is installed during the operation of the device, so that the safety of the whole operation process is improved, and the motor protection cover 101 can protect the high-speed motor 8 from being damaged by the cut branches during the operation.

Working principle: as can be seen from fig. 1 to 8, the generator 2 performs electric power distribution through the distribution box 3, drives the hydraulic station to drive the rotary oil cylinder 5, the lifting oil cylinder 51, the folding arm oil cylinder 52 and the front and rear cutter head oil cylinder 53 to work through electric power, so that the fixed frame 4, the big arm 6, the telescopic arm 61, the folding arm 64 and the cutter frame arm 7 perform linkage work, the folding arm 64 can rotate in the horizontal direction through the cooperation of the two folding arm rotary discs 62 and the folding arm oil cylinder 52, the big arm 6 can lift and adjust the level and the height front and rear of the cutter 9, the cutter 9 can rotate through the wireless remote control of the high-speed motor 8, the equipment is ensured to be suitable for the angle required by trimming of various hedges, meanwhile, the control line extending out of the hydraulic station is stored through the wire groove rail 63, the equipment is kept clean, the guide plate 103 can avoid the clearance between the cutter 9 and the cutter 9 to be blocked during the equipment work, the flatness after cutting is ensured, the installation of the cutter shield 104 is used in the equipment, the safety of the whole working process is improved, and the motor shield 101 can protect the high-speed motor 8 from being damaged during the work.

When the device is used and needs to install the blade 9, a new blade 9 is placed on the L-shaped frame 822 of the fixed seat 82, the third fixing hole 91 and the third fourth fixing hole 92 of the blade 9 are respectively aligned with the first fixing hole 823 and the third second fixing hole 824 of the L-shaped frame 822, after the alignment, the two elastic plates 841 are pressed down, the fixing pin 831 is driven to slide towards the blade 9, the two elastic pressing plates 83 are located in the sliding groove 86 to slide to a high position, when the two elastic pressing plates 83 move to a high position, the fixing pin 831 is attached to the blade 9 from the fixed seat 82, at the moment, the three fixing rods 87 penetrate through the three fourth fixing holes 92 to be clamped in the three second fixing holes 824, meanwhile, the fixing blocks 84 penetrate through the third fixing holes 91 to be clamped with the first fixing holes 823, the rotating block 88 is enabled to follow the rotating block 88 to rotate in the annular groove 842, the two pushing plates 881 are enabled to contact with the two elastic plates 841 when the two pushing plates 881 rotate, the two pushing plates 881 are enabled to continuously rotate, and the two pushing plates 881 are enabled to be in a state of being continuously clamped with the two elastic plates 841 and the two pushing plates are kept in a state of being clamped between the two elastic plates and the two elastic plates 841, and the two elastic plates are kept in a state of the two elastic plates and the two elastic plates are kept in a state of being connected with the two and the two elastic plates and the two opposite between the elastic plates.

When the blade 9 needs to be replaced, the clamping state of the rotating block 88 is released, the two pushing plates 881 are driven to release the pushing of the two elastic plates 841, the two elastic plates 841 are reset, the two elastic sliding blocks 85 release the application of pressure, the springs of the elastic sliding blocks 85 restore to the initial state and restore to the inside of the fixed block 84, the clamping state of the fixed block 84 and the L-shaped frame 822 is released by the restoration of the elastic sliding blocks 85, at the moment, the springs of the two elastic pressing plates 83 at the two sides of the fixed pin 831 are pressed and deformed to restore to the initial state, the fixed pin 831 is driven to move to a low displacement, the fixed seat 82 is retracted, and the clamping of the three fixed rods 87 and the fixed block 84 to the blade 9 is released, so that the blade 9 which needs to be replaced can be removed.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims (8)

1. A heavy hedge trimmer, comprising:

the base (1), the last rotation of base (1) is provided with mount (4), the one end axial rotation of mount (4) is provided with big arm (6), it is provided with telescopic arm (61) to slide in big arm (6), the one end rotation of telescopic arm (61) is provided with folding arm (64), the one end axial rotation of folding arm (64) is provided with tool rest arm (7);

the high-speed motor (8), its screw thread sets up on tool rest arm (7), and be linear array and arrange on tool rest arm (7), the output of high-speed motor (8) is fixed to be provided with fixing base (82), sliding on fixing base (82) is provided with fixed pin (831), fixing base (82) activity is provided with blade (9), blade (9) with fixed pin (831) joint cooperation.

2. A heavy hedge trimmer according to claim 1 wherein the mounting frame (4) is fixedly provided with a hydraulic station, the mounting frame (4) is fixedly provided with a generator (2), the mounting frame (4) is fixedly provided with a distribution box (3), the hydraulic station is electrically matched with the generator (2), and the distribution box (3) is matched with the generator (2);

a lifting oil cylinder (51) is arranged between the fixed frame (4) and the large arm (6), a rotary oil cylinder (5) is arranged between the base (1) and the fixed frame (4), a folding arm oil cylinder (52) is arranged between the telescopic arm (61) and the folding arm (64), and a cutter head front-rear oil cylinder (53) is arranged between the folding arm (64) and the cutter rest arm (7);

the hydraulic station is matched with the rotary oil cylinder (5), the lifting oil cylinder (51), the folding arm oil cylinder (52) and the front and rear cutter head oil cylinder (53).

3. A heavy hedge trimmer according to claim 1 wherein one end of the large arm (6) is symmetrically and fixedly provided with a folding arm rotary disc (62), the folding arm (64) being located for rotation within the folding arm rotary disc (62);

and a wire groove rail (63) is fixedly arranged on the big arm (6) and the telescopic arm (61).

4. A heavy hedge trimmer according to claim 1 wherein the blade carrier arm (7) is fixedly provided with a fixed support (102) arranged in a linear array, the high speed motor (8) being threadedly mounted on the fixed support (102);

an L-shaped frame (822) is fixedly arranged on the fixing seat (82), and elastic pressing plates (83) are symmetrically and fixedly arranged on the fixing pins (831);

the fixed seat (82) is provided with a fixed groove (821), the fixed seat (82) is symmetrically provided with sliding grooves (86), the elastic pressing plate (83) is slidably arranged in the sliding grooves (86), and the output end of the high-speed motor (8) is fixedly arranged in the fixed groove (821).

5. A heavy hedge trimmer according to claim 4 wherein the fixing pins (831) are fixedly provided with fixing bars (87) arranged in a circumferential array, one end of the fixing pins (831) being fixedly provided with fixing blocks (84);

the L-shaped frame (822) is provided with first fixing holes (823), and the L-shaped frame (822) is provided with second fixing holes (824) which are arranged in a circumferential array;

the novel rotary cutter further comprises a third fixing hole (91) formed in the cutter blade (9), and a fourth fixing hole (92) which is arranged in a circumferential array is formed in the cutter blade (9);

the fixing rod (87) penetrates through the second fixing hole (824) and is in clamping fit with the second fixing hole (824), and the fixing block (84) penetrates through the third fixing hole (91) and is in clamping fit with the first fixing hole (823).

6. A heavy hedge trimmer according to claim 5 wherein the fixing pin (831) is fixedly provided with a T-bar (832);

the clamping groove (89) is formed in the fixed block (84), the annular groove (842) is formed in the fixed block (84), the T-shaped rod (832) extends into the clamping groove (89), the rotating block (88) is arranged on the T-shaped rod (832) in a sliding mode, and the clamping groove (89) is matched with the rotating block (88) in a clamping mode.

7. A heavy hedge trimmer according to claim 6 wherein the turning block (88) is symmetrically and fixedly provided with a push plate (881), the ring groove (842) is symmetrically and fixedly provided with an elastic plate (841), and one end of the push plate (881) is tangentially matched with the elastic plate (841);

elastic sliding blocks (85) are symmetrically arranged in the fixed blocks (84) in a sliding mode, the elastic sliding blocks (85) are matched with the elastic plates (841), and the elastic sliding blocks (85) are matched with the L-shaped frames (822) in a clamping mode.

8. A heavy hedge trimmer according to claim 1 wherein the blade carrier arms (7) are provided with motor shields (101) symmetrically and fixedly arranged, the blade carrier arms (7) are provided with guide plates (103) arranged in a linear array, and the blade carrier arms (7) are provided with cutter shields (104) symmetrically and fixedly arranged.