Trimming equipment with adjustable angle

Abstract

The invention relates to the field of gardening tools, and particularly discloses angle-adjustable pruning equipment which comprises a rod body, a machine head assembly assembled at the end of the rod body, a motor assembly arranged on the machine head assembly and a shearing mechanism connected with the motor assembly, and the motor assembly outputs shearing power to the shearing mechanism; the operation plane P1 of the shearing mechanism is matched with the to-be-trimmed surface of the hedge to form a trimming operation plane P2; when the side surface of the hedge is trimmed, the operation plane P1 of the shearing mechanism is kept in parallel contact with the trimming operation plane P2, an operator moves to drive the shearing mechanism to do plane type trimming motion along the trimming operation plane P2, and trimming at a first operation height h1 is completed; an angle adjusting mechanism is arranged between the shearing mechanism and the machine head assembly, the included angle between the shearing mechanism and the rod body is changed through the angle adjusting mechanism, the operation plane P1 of the shearing mechanism is kept in parallel contact with the surface of the second operation height h2, and multi-level continuous pruning operation can be achieved.

Description

Technical Field

[0001] The present application relates to the field of garden tools, and in particular to a pruning device with adjustable angle. Background Art

[0002] Hedge trimmers are inconvenient and inefficient to use. Users need to repeatedly swing the arm to raise and lower the trimmer while walking along the hedge, which is physically demanding and easily causes fatigue.

[0003] Through the understanding of relevant technologies, the end of the pruning head of some hedge trimmers is connected to the rod body. During use, in order to achieve a better pruning effect, the pruning head of the hedge trimmer and the rod body need to be adjusted to a certain angle. This design will generate a torsional load on the rod body. The user needs to constantly resist this torsional force during the pruning process, further increasing the difficulty and fatigue of the operation.

[0004] In addition, the head assembly and the pruning head of the hedge trimmer will contact the hedge at the same time during trimming. When the user's arm swings the hedge trimmer back and forth, the head assembly creates resistance to the trimming process, reducing trimming efficiency. Summary of the invention

[0005] The purpose of at least one specific embodiment of the present invention is to solve the defects of the prior art and provide a trimming device with adjustable angle.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A trimming device with adjustable angle, comprising:

[0008] Rod body;

[0009] A head assembly assembled on the end of the rod body;

[0010] A motor assembly disposed on the head assembly;

[0011] A shearing mechanism connected to the motor assembly, the motor assembly outputting shearing power to the shearing mechanism;

[0012] The connection node between the motor assembly and the shearing mechanism is disposed in the middle region of the shearing mechanism, and the shearing mechanism includes a trimming head, and the trimming head extends toward both sides of the connection node;

[0013] The working plane of the shearing mechanism is matched with the surface of the hedge to be trimmed to form a trimming working surface;

[0014] The shearing mechanism is located on one side of the head assembly. In a direction perpendicular to the working plane of the shearing mechanism, there is a height difference between the shearing mechanism and the head assembly. When the hedge surface is trimmed, the shearing mechanism first approaches the trimming working surface, and the head assembly is located behind the working plane of the shearing mechanism.

[0015] An angle adjustment mechanism is provided between the shearing mechanism and the head assembly. The angle adjustment mechanism includes a driving member and a transmission member connected to the driving member. When the motor assembly outputs shearing power to the shearing mechanism, the driving member can synchronously drive the shearing mechanism to rotate relative to the rod body through the transmission member to adjust the working plane angle of the shearing mechanism so that the working plane is in parallel contact with the surface of the trimming working surface.

[0016] Furthermore, the shearing mechanism and the angle adjustment mechanism are respectively located on both sides of the central axis of the rod body, so that the weight on both sides of the rod body is balanced.

[0017] Furthermore, the head assembly includes a casing mounted on the end of the rod body, and the motor assembly and the angle adjustment mechanism are both mounted on the casing.

[0018] Further, the angle adjustment mechanism comprises:

[0019] An angle adjustment motor, which is mounted on the housing;

[0020] A worm gear connected to a power output end of the angle adjustment motor;

[0021] a worm wheel meshing with the worm;

[0022] A rotating shaft, which is rotatably mounted on the housing, one end of which is connected to the worm gear and the other end of which is connected to the motor assembly;

[0023] The angle adjustment motor is configured as a driving member, and the worm, worm wheel and rotating shaft that cooperate with each other are configured as transmission members;

[0024] The angle adjustment motor drives the worm wheel to rotate through the worm, and the worm wheel drives the motor assembly and the shearing mechanism to rotate through the rotating shaft to achieve angle adjustment.

[0025] Furthermore, at least one of the angle adjustment motor, the worm and the worm wheel is located on both sides of the central axis of the rod body relative to the pruning head, so that the weight of both sides of the rod body is balanced.

[0026] Furthermore, the motor assembly includes a mounting housing, a working motor arranged in the mounting housing, a transmission connected to an output end of the working motor, a power output end of the transmission connected to a pruning head, and the mounting housing connected to a rotating shaft.

[0027] Furthermore, a first switch and a second switch are provided on the rod body, the first switch is suitable for controlling the opening and closing of the working motor, and the second switch is suitable for controlling the opening and closing of the angle adjustment motor;

[0028] When the working motor drives the pruning head to operate, the angle adjustment motor can synchronously drive the pruning head to adjust its angle.

[0029] Furthermore, the rotation angle of the pruning head can achieve stepless speed regulation.

[0030] Furthermore, a power supply is installed on the rod body, and the power supply is electrically connected to the working motor and the angle adjustment motor.

[0031] Furthermore, when performing the hedge surface trimming operation, the operator holds the rod body facing the trimming operation surface, so that the operation plane of the shearing mechanism is kept in parallel contact with the trimming operation surface, and the operator moves to drive the shearing mechanism to perform a planar trimming movement along the trimming operation surface, thereby completing the trimming at the first operation height;

[0032] When trimming at the second working height, adjust the rod body to the corresponding height, change the angle between the shearing mechanism and the rod body through the angle adjustment mechanism, maintain the working plane of the shearing mechanism in parallel contact with the surface of the second working height, and realize multi-level continuous trimming operations.

[0033] The beneficial effects of the present application are as follows: 1. The present application optimizes the connection mode between the shearing mechanism and the head assembly. When performing hedge surface trimming operations, the operator holds the rod body facing the trimming operation surface, and the operation plane of the shearing mechanism always maintains parallel contact with the surface of the hedge to be trimmed. The user only needs to hold the rod body and move along the trimming operation surface to complete the trimming, without repeatedly swinging the arm to lift the device, which significantly reduces the operating intensity and improves the user's comfort;

[0034] 2. This application provides an angle adjustment mechanism, so that the user can adjust the angle between the shear mechanism and the rod without stopping pruning, thus achieving multi-level continuous pruning operations and greatly improving pruning efficiency;

[0035] 3. The shearing mechanism and angle adjustment mechanism are respectively arranged on both sides of the central axis of the rod body, so that the weight on both sides of the equipment is balanced, which effectively reduces the torsional load on the rod body and makes the operation easier and more stable;

[0036] 4. The shearing mechanism is arranged on one side of the head assembly, so that the shearing mechanism is first close to the trimming operation surface, and the head assembly is located behind the operation plane of the shearing mechanism, which avoids direct interference of the head assembly on the trimming process and improves the fluency and efficiency of trimming;

[0037] 5. Users can adjust the rotation angle of the pruning head in real time during the pruning process without stopping the operation or releasing the device, which simplifies the operation process and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 This is a schematic diagram of the structure of this application.

[0040] Figure 2 It is a cross-sectional schematic diagram of the present application.

[0041] Figure 3 This is the usage status diagram of this application under the first working condition.

[0042] Figure 4 It is a schematic diagram of the angle formed by the working plane of the shearing mechanism relative to the central axis of the rod body under the first working condition of the present application.

[0043] Figure 5 This is the usage status diagram of this application under the second working condition.

[0044] Figure 6 Schematic diagram of the angle formed by the working plane of the shearing mechanism relative to the central axis of the rod body under the second working condition of the present application.

[0045] Figure 7 This is the usage status diagram of this application under the third working condition.

[0046] Figure 8 It is a schematic diagram of the angle formed by the working plane of the shearing mechanism relative to the central axis of the rod body under the third working condition of the present application.

[0047] Fig. 9 This is the usage status diagram of this application under the fourth working condition.

[0048] Fig.10 It is a schematic diagram of the angle formed by the working plane of the shearing mechanism relative to the central axis of the rod body under the fourth working condition of the present application.

[0049] Fig.11 This is a side view of the application when in use.

[0050] Fig.12 This is a front view of the application when in use.

[0051] Fig.13 This is a schematic diagram of the assembly of the motor assembly, shearing mechanism and angle adjustment mechanism of the present application.

[0052] Fig.14This is a schematic diagram of the assembly of the shearing mechanism of this application. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] Reference Figure 1 , Figure 2 , Figure 3 , Fig.11 , Fig.13 , an angle-adjustable trimming device 100, comprising a rod body 10, a head assembly 20 mounted on the end of the rod body 10, a motor assembly 30 disposed on the head assembly 20, a shearing mechanism 40 connected to the motor assembly 30, and the motor assembly 30 outputs shearing power to the shearing mechanism 40;

[0055] The connection node J between the motor assembly 30 and the shearing mechanism 40 is arranged in the middle area of ​​the shearing mechanism 40, and the working plane P1 of the shearing mechanism 40 is adapted to the surface of the hedge to be trimmed to form a trimming working plane P2;

[0056] When trimming the side surface of the hedge, the operator holds the rod 10 facing the trimming operation surface P2, so that the operation plane P1 of the shearing mechanism 40 is kept parallel to the trimming operation surface P2, and the operator moves to drive the shearing mechanism 40 to perform a planar trimming motion along the trimming operation surface P2, thereby completing the trimming of the first operation height h1;

[0057] An angle adjustment mechanism 50 is provided between the shearing mechanism 40 and the head assembly 20. When trimming at the second working height h2, the rod body 10 is adjusted to the corresponding height. The angle between the shearing mechanism 40 and the rod body 10 is changed by the angle adjustment mechanism 50, and the working plane P1 of the shearing mechanism 40 is maintained in parallel contact with the surface of the second working height h2, thereby realizing multi-level continuous trimming operations.

[0058] Specifically, the technical points of the present application are described in detail below in combination with the pruning methods of the pruning device 100 under four different working conditions:

[0059] When the trimming device 100 trims the hedge, it mainly involves the side surface and the top surface of the hedge. In this embodiment, the height of the hedge is set to be greater than the height of the human body, and the top surface of the hedge is located above the operator's head.

[0060] When trimming the side of the hedge, since the side of the hedge is relatively high, we set the side height of the hedge below the height of the operator's arm as the first working height h1, the side height of the hedge consistent with the height of the operator's arm as the second working height h2, the side height of the hedge above the height of the operator's arm as the third working height h3, and the top height of the hedge above the operator's head as the fourth working height h4;

[0061] Reference Figure 3 , Figure 4 When trimming the hedge at the first working height h1 on the side, since the first working height h1 is lower than the height of the operator's arm, when the operator holds the rod body 10, the rod body 10 is tilted downward relative to the human body. At this time, the working plane P1 of the shearing mechanism 40 is at an acute angle α1 relative to the central axis S1 of the rod body 10, which ensures that the working plane P1 of the shearing mechanism 40 maintains parallel contact with the trimming working surface P2. The operator drives the shearing mechanism 40 to perform a planar trimming movement along the trimming working surface P2 by moving forward, thereby completing the trimming of the first working height h1.

[0062] Reference Figure 5 , Figure 6 After the first working height h1 is trimmed, the operator moves the trimming device 100 to the starting position on the side of the hedge, and performs a trimming operation on the second working height h2 of the side of the hedge. Since the second working height h2 is basically consistent with the height of the operator's arm, when the operator holds the rod body 10, the rod body 10 is perpendicular to the trimming working surface P2 relative to the human body. At this time, the working plane P1 of the shearing mechanism 40 is at a right angle α2 to the central axis S1 of the rod body 10, which can ensure that the working plane P1 of the shearing mechanism 40 maintains parallel contact with the trimming working surface P2. The operator drives the shearing mechanism 40 to perform a planar trimming movement along the trimming working surface P2 by moving forward, and the trimming of the second working height h2 can be completed.

[0063] Reference Figure 7 , Figure 8 After the second working height h2 is trimmed, the operator moves the trimming device 100 to the starting position on the side of the hedge, and performs trimming operation on the third working height h3 on the side of the hedge. Since the third working height h3 is higher than the height of the operator's arm, when the operator holds the rod body 10, the rod body 10 is tilted upward relative to the human body. At this time, the working plane P1 of the shearing mechanism 40 is at an obtuse angle α3 relative to the central axis S1 of the rod body 10, which can ensure that the working plane P1 of the shearing mechanism 40 maintains parallel contact with the trimming working surface P2. The operator drives the shearing mechanism 40 to perform a planar trimming movement along the trimming working surface P2 by moving forward, and the trimming of the third working height h3 can be completed.

[0064] Reference Fig. 9 , Fig.10 After the third working height h3 is trimmed, the operator moves the trimming device 100 to the starting position on the side of the hedge, and performs a trimming operation on the fourth working height h4 on the side of the hedge (the trimming operation surface P3 where the fourth working height h4 is located is the top surface of the hedge). Since the fourth working height h4 is higher than the height above the operator's head, when the operator holds the rod body 10, the rod body 10 is also tilted upward relative to the human body. At this time, the working plane P1 of the shearing mechanism 40 is at an angle α4 relative to the central axis S1 of the rod body 10, which can ensure that the working plane P1 of the shearing mechanism 40 maintains parallel contact with the trimming operation surface P3. The operator drives the shearing mechanism 40 to perform a planar trimming movement along the trimming operation surface P3 by moving forward, thereby completing the trimming of the fourth working height h4.

[0065] The present application adjusts the angle (acute angle α1, right angle α2, obtuse angle α3 and angle α4) of the working plane P1 of the shearing mechanism 40 relative to the central axis S1 of the rod body 10 to ensure that the working plane P1 always maintains parallel contact with the pruning working surfaces (P2 or P3) at different heights, thereby achieving precise pruning; the tiltable design of the shearing mechanism 40 enables the operator to easily cope with pruning needs at different heights without frequently changing equipment or adjusting posture; through planar pruning movement, the shearing mechanism 40 can quickly and evenly complete the trimming of the hedge side, thereby improving work efficiency; this design is suitable for a variety of working heights from low to high, and can meet the hedge pruning needs in different scenarios.

[0066] Moreover, it should be noted that the angle adjustment mechanism 50 is an automatic adjustment mechanism. No matter the shearing mechanism 40 of the trimming device 100 is performing a trimming operation at the first working height h1, the second working height h2, the third working height h3 or the fourth working height h4, when adjusting the trimming angle of the shearing mechanism 40, the user does not need to stop the operation of the motor assembly 30. During the operation of the shearing mechanism 40 driven by the motor assembly 30, the user can start the angle adjustment mechanism 50 through the switch on the rod body 10 to automatically adjust the angle of the shearing mechanism 40. There will be no conflict between the angle adjustment action of the shearing mechanism 40 and its own trimming action. In this way, the user does not need to turn off the motor assembly 30 when using the trimming device 100, and the operation is more convenient.

[0067] Further, refer to Fig.11, the shearing mechanism 40 includes a pruning head 401, which extends toward both sides of the connection node J, which provides better balance. Specifically, this symmetrical extension design enables the shearing mechanism 40 to evenly distribute the force during operation, avoiding the center of gravity offset problem common in traditional pruning equipment. Therefore, when the operator adjusts the angle of the shearing mechanism 40, the pruning device 100 can always maintain a stable posture and will not tilt forward due to the forward shift of the center of gravity like a traditional hedge trimmer.

[0068] Further, refer to Figure 4 , Figure 6 , Figure 8 , Fig.10 , Fig.12 , the shearing mechanism 40 is located on one side of the head assembly 20, and in the direction perpendicular to the working plane P1 of the shearing mechanism 40, there is a height difference between the shearing mechanism 40 and the head assembly 20. When the hedge surface pruning operation is performed, the shearing mechanism 40 first approaches the pruning working plane P2, and the head assembly 20 is located behind the working plane P1 of the shearing mechanism 40. When pruning the hedge, the operator holds the rod body 10 so that the working plane P1 of the pruning head 401 of the shearing mechanism 40 is parallel to the pruning working plane P2. The pruning head 401 will first contact the surface of the hedge, thereby pruning the surface branches and leaves of the hedge. During the translational pruning process of the scissor head 401, the head assembly 20 will never contact the surface of the hedge, and the head assembly 20 will not interfere with the operation of the pruning head 401. During the entire pruning process, the head assembly 20 is always located behind the shearing mechanism 40 and will not contact the surface of the hedge. This design avoids secondary interference of the head assembly on the hedge and ensures the neatness of the pruning.

[0069] Further, refer to Figure 2 , Fig.13 The head assembly 20 includes a housing 201 installed at the end of the rod body 10 , a controller 202 is installed in the interlayer of the housing 201 , and the motor assembly 30 and the angle adjustment mechanism 50 are both installed on the housing 201 .

[0070] Further, the angle adjustment mechanism 50 includes an angle adjustment motor 501 mounted on the housing 201, a worm 502 connected to the power output end of the angle adjustment motor 501, a worm wheel 503 meshing with the worm 502, and a rotating shaft 504, wherein the rotating shaft 504 is rotatably mounted on the housing 201, one end of which is connected to the middle of the worm wheel 503, and the other end is connected to the motor assembly 30;

[0071] The angle adjustment motor 501 drives the worm wheel 503 to rotate through the worm 502 , and the worm wheel 503 drives the motor assembly 30 and the shearing mechanism 40 to rotate through the rotating shaft 504 to achieve angle adjustment.

[0072] Furthermore, the motor assembly 30 includes a mounting housing 301 , a working motor 302 disposed in the mounting housing 301 , a transmission 303 connected to an output end of the working motor 302 , a power output end of the transmission 303 connected to a pruning head 401 , and the mounting housing 301 connected to a rotating shaft 504 .

[0073] The angles of the motor assembly 30 and the shearing mechanism 40 are mainly adjusted by the angle adjustment mechanism 50. During the angle adjustment process, the motor assembly 30 can drive the shearing mechanism 40 to work. For details, refer to Fig.14 The trimming head 401 includes a fixed blade holder 401a, and a movable blade 401b arranged on one side of the fixed blade holder 401a. In addition, the output end of the transmission 303 is connected to an output shaft 304, and an eccentric wheel 305 is installed on the output shaft 304. When the motor assembly 30 drives the shearing mechanism 40 to work, the driving force of the working motor 302 is transmitted to the output shaft 304 through the transmission 303. When the output shaft 304 rotates, the movable blade 401b is driven to swing back and forth on one side of the fixed blade holder 401a through the eccentric wheel 305, so as to achieve the purpose of shearing. It should be noted that the structure of the trimming head 401 is a prior art and is not described in detail in this embodiment.

[0074] In this embodiment, refer to Fig.11 When the trimming device 100 is in use, from the perspective of the operator looking toward the trimming operation surface P2, it can be intuitively seen that the shearing mechanism 40 and the angle adjustment mechanism 50 are respectively located on both sides of the central axis S1 of the rod body 10, so that the weight on both sides of the rod body 10 is balanced. In particular, when the angle adjustment mechanism 50 drives the shearing mechanism 40 to adjust the angle, this balanced state will not change. This design effectively avoids the unstable operation or tilting of the device due to excessive weight on one side. The symmetrical layout enables the device to maintain a stable posture during trimming operations, reducing shaking and jittering, thereby improving the trimming accuracy and efficiency.

[0075] Specifically, in some embodiments, at least one of the angle adjustment motor 501, the worm 502, and the worm wheel 503 is located on both sides of the central axis S1 of the rod body 10 relative to the pruning head 401, so that the weight on both sides of the rod body 10 is balanced. This layout further optimizes the weight distribution of the device and ensures the weight balance on both sides of the rod body 10; by symmetrically arranging key components such as the angle adjustment motor 501, the worm 502, and the worm wheel 503, the device can maintain a stable posture when adjusting the angle, avoiding unstable operation or tilting caused by the center of gravity shift. The symmetrical layout makes it easier for the operator to adjust the angle of the shearing mechanism 40, without the need for additional effort to maintain the balance of the device, thereby improving the convenience and comfort of operation.

[0076] Furthermore, the rod body 10 is provided with a first switch 101 and a second switch 102, the first switch 101 is suitable for controlling the on and off of the working motor 302, and the second switch 102 is suitable for controlling the on and off of the angle adjustment motor 501;

[0077] When the working motor 302 drives the trimming head 401 to operate, the angle adjustment motor 501 can synchronously drive the trimming head 401 to adjust its angle, wherein the rotation angle of the trimming head 401 can achieve stepless speed regulation.

[0078] Furthermore, a power supply is installed on the rod body 10 , and the power supply is electrically connected to the working motor 302 and the angle adjustment motor 501 to provide power for the working motor 302 and the angle adjustment motor 501 .

[0079] In summary, the present application optimizes the connection mode between the shearing mechanism 40 and the head assembly 20. When performing the hedge surface trimming operation, the operator holds the rod body 10 facing the trimming operation surface, and the operation plane P1 of the shearing mechanism 40 always maintains parallel contact with the surface of the hedge to be trimmed. The user only needs to hold the rod body 10 and move along the trimming operation surface P2 to complete the trimming, without repeatedly swinging the arm to lift the device, which significantly reduces the operation intensity and improves the user comfort.

[0080] By providing an angle adjustment mechanism 50, the user can adjust the angle between the shear mechanism 40 and the rod body 10 without stopping the trimming, thereby achieving multi-level continuous trimming operations and greatly improving the trimming efficiency.

[0081] The shearing mechanism 40 and the angle adjustment mechanism 50 are respectively arranged on both sides of the central axis S1 of the rod body 10, so that the weight of both sides of the device is balanced, which effectively reduces the torsional load on the rod body 10 and makes the operation easier and more stable;

[0082] The shearing mechanism 40 is arranged on one side of the head assembly 20, so that the shearing mechanism 40 is firstly close to the trimming operation surface P2, and the head assembly 20 is located behind the shearing mechanism 40, so that the head assembly 20 is avoided from directly interfering with the trimming process, and the fluency and efficiency of trimming are improved;

[0083] The user can adjust the rotation angle of the pruning head 401 in real time during the pruning process without stopping the operation or releasing the device, which simplifies the operation process and improves the user experience.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A trimming device with adjustable angle, comprising: Rod body; A head assembly assembled on the end of the rod body; A motor assembly disposed on the head assembly; a shearing mechanism connected to the motor assembly, the motor assembly outputting shearing power to the shearing mechanism; Features: The connection node between the motor assembly and the shearing mechanism is disposed in a middle region of the shearing mechanism, and the shearing mechanism includes a trimming head, and the trimming head extends toward both sides of the connection node; The working plane of the shearing mechanism is adapted to the surface of the hedge to be trimmed to form a trimming working surface; The shearing mechanism is located at one side of the head assembly. In a direction perpendicular to the working plane, there is a height difference between the shearing mechanism and the head assembly. When the hedge surface is trimmed, the shearing mechanism first approaches the trimming working surface, and the head assembly is located behind the working plane of the shearing mechanism. An angle adjustment mechanism is provided between the shearing mechanism and the head assembly, and the angle adjustment mechanism includes a driving member and a transmission member connected to the driving member. When the motor assembly outputs shearing power to the shearing mechanism, the driving member can synchronously drive the shearing mechanism to rotate relative to the rod body through the transmission member to adjust the working plane angle of the shearing mechanism so that the working plane is in parallel contact with the surface of the trimming working surface.

2. The angle-adjustable trimming device according to claim 1, characterized in that: The shearing mechanism and the angle adjustment mechanism are respectively located on both sides of the central axis of the rod body, so that the weight on both sides of the rod body is balanced.

3. The angle-adjustable trimming device according to claim 1, characterized in that: The head assembly comprises a housing mounted on the end of the rod body, and the motor assembly and the angle adjustment mechanism are both mounted on the housing.

4. The angle-adjustable trimming device according to claim 3, characterized in that: The angle adjustment mechanism comprises: An angle adjustment motor, which is mounted on the housing; A worm connected to a power output end of the angle adjustment motor; a worm wheel meshing with the worm; A rotating shaft, which is rotatably mounted on the housing, one end of which is connected to the worm gear and the other end of which is connected to the motor assembly; Wherein, the angle adjustment motor is configured as the driving member, and the worm, worm wheel and rotating shaft that cooperate with each other are configured as the transmission member; The angle adjustment motor drives the worm wheel to rotate through the worm, and the worm wheel drives the motor assembly and the shearing mechanism to rotate through the rotating shaft to achieve angle adjustment.

5. The angle-adjustable trimming device according to claim 4, characterized in that: At least one of the angle adjustment motor, the worm and the worm wheel is located on both sides of the central axis of the rod body relative to the pruning head, so that the weight of both sides of the rod body is balanced.

6. The angle-adjustable trimming device according to claim 4, characterized in that: The motor assembly comprises a mounting housing, a working motor arranged in the mounting housing, a transmission connected to an output end of the working motor, a power output end of the transmission connected to the pruning head, and the mounting housing connected to the rotating shaft.

7. The angle-adjustable trimming device according to claim 6, characterized in that: The rod body is provided with a first switch and a second switch, the first switch is suitable for controlling the on and off of the working motor, and the second switch is suitable for controlling the on and off of the angle adjustment motor; When the working motor drives the pruning head to operate, the angle adjustment motor can synchronously drive the pruning head to adjust its angle.

8. The angle-adjustable trimming device according to claim 4, characterized in that: The rotation angle of the trimming head can realize stepless speed regulation.

9. The angle-adjustable trimming device according to claim 6, characterized in that: A power source is installed on the rod body, and the power source is electrically connected to the working motor and the angle adjustment motor.

10. The angle-adjustable trimming device according to claim 1, characterized in that: When performing hedge surface trimming operations, the operator holds the rod body facing the trimming operation surface, so that the operation plane of the shearing mechanism maintains parallel contact with the trimming operation surface, and the operator moves to drive the shearing mechanism to perform a planar trimming movement along the trimming operation surface to complete trimming at a first operation height; When trimming at a second working height, the rod body is adjusted to a corresponding height, and the angle between the shearing mechanism and the rod body is changed by the angle adjustment mechanism to maintain the working plane of the shearing mechanism in parallel contact with the surface of the second working height, thereby achieving multi-level continuous trimming operations.

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