Pruning shears with adjustable cutting angle

Abstract

This utility model discloses a pruning shears with an easily adjustable pruning angle, including a handle assembly, a head assembly, and a pruning blade assembly. The handle assembly includes a housing and a main handle and a secondary handle, each equipped with a main wrench and a secondary wrench, respectively. The main handle is fixedly connected to the housing, and the secondary handle is rotatable around the circumference of the housing. The pruning blade assembly is connected to the end of the housing via the head assembly and is circumferentially fixed to the main handle. This utility model changes the traditional structure of pruning machines where the main and secondary handles are fixed to the housing around the circumference. It innovatively optimizes the secondary handle so that it rotates around the housing. In use, simply rotating the main handle rotates the housing, which in turn rotates the head assembly and pruning blade assembly mounted on it. The other hand holding the secondary handle does not need to rotate with it, maintaining a relatively comfortable angle, thus achieving more comfortable operation and reducing operator fatigue and discomfort.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a pruning shear that is easy to adjust the pruning angle. Background Technology

[0002] Pruning shears are gardening tools primarily used to trim excess or irregular growth on trees, shrubs, and other plants. This helps promote healthy plant growth, improve ventilation and light conditions, and shape the plant. There are different types of pruning shears, mainly including manual shears, long-handled shears (for taller branches), and electric pruning shears, with electric pruning shears being the most widely used.

[0003] Chinese utility model patent CN202773510U discloses a novel pruning shear, comprising a housing, a rear handle (main handle), an auxiliary handle (secondary handle), a motor, a transmission mechanism, a pruning blade assembly, and a battery pack mounted at the front of the main unit. The rear handle has a main wrench, and the auxiliary handle has a linkage wrench. The motor and transmission mechanism form the machine head assembly. In use, the user holds both the rear handle and the auxiliary handle with both hands and simultaneously presses the wrench on each handle to activate the machine. The motor drives the pruning blade assembly via the transmission mechanism. With this pruning shear, adjusting the angle between the pruning blade and the plant to be pruned (i.e., rotation around the length of the pruning blade) requires both hands to operate, simultaneously rotating both handles to achieve the desired rotation. While this is acceptable for small angle adjustments, larger angle adjustments result in an uncomfortable working posture for the hands, increasing operator fatigue and discomfort. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pruning shear that is easy to adjust the pruning angle. The angle of the pruning blade can be adjusted by simply turning the main handle with one hand, while the other hand can always hold the secondary handle at a relatively comfortable angle, thus achieving a more comfortable operation.

[0005] The technical solution to achieve the purpose of this utility model is:

[0006] A pruning shears with an adjustable pruning angle includes a handle assembly, a head assembly, and a pruning blade assembly. The handle assembly includes a housing and a main handle and a secondary handle, each equipped with a main wrench and a secondary wrench, respectively. The main handle is fixedly connected to the housing, and the secondary handle is rotatably arranged along the circumference of the housing. The pruning blade assembly is connected to the end of the housing through the head assembly and is circumferentially fixed to the main handle.

[0007] Furthermore, the handle assembly also includes a central tube, with the main handle and housing sleeved at both ends of the central tube and fixedly connected to the central tube, and the auxiliary handle sleeved on the central tube and located between the main handle and the housing, rotating in cooperation with the central tube, the main handle and the housing.

[0008] Furthermore, the auxiliary handle is a tubular structure with both ends extending to the main handle and the housing, respectively. The auxiliary handle is axially limited by the end faces of the main handle and the housing. A notch extending along the length direction is opened on the outer peripheral surface of the auxiliary handle, and the auxiliary wrench is installed in the notch.

[0009] Furthermore, the secondary handle includes a tubular body and a first annular handle fixed to the outer periphery of the body. The body is loosely fitted onto the central tube, and the first annular handle has a notch on the inner side of the body, with the secondary wrench installed in the notch.

[0010] Furthermore, the length of the main body is less than the distance between the main handle and the housing.

[0011] Furthermore, the straight section of the pruning blade assembly is parallel to the handle assembly and offset from the bottom of the main handle. The head assembly is rotatably mounted on the end of the housing along an axis perpendicular to the housing and is connected to the housing by a locking mechanism.

[0012] Furthermore, the end of the housing away from the main handle is provided with an annular connecting part, the inner ring of the annular connecting part is provided with an annular groove, the head assembly is inserted into the annular connecting part with a gap, and the outer circumferential surface is provided with an annular protrusion that matches the annular groove. The annular protrusion is fitted into the annular groove with a gap, forming an axial limit on the head assembly.

[0013] Furthermore, the locking mechanism includes a locking button and a locking pin movably disposed within the housing along the axial direction. The outer peripheral surface of the head assembly and the pruning blade assembly are symmetrically provided with locking grooves that are adapted to the end face of the locking pin at their alignment along the length direction. The outer peripheral surface of the housing is provided with a sliding groove, and a strip-shaped through groove is formed in the sliding groove. The locking button is slidably disposed in the sliding groove and connected to the locking pin through the strip-shaped through groove. The head assembly is adapted to drive the locking pin to insert into and disengage from the locking groove by pushing the locking button to form locking and unlocking with the housing.

[0014] Furthermore, the locking pin has a groove at one end near the head assembly, and a metal insert that communicates with the handle assembly is embedded in the groove. A metal socket that matches the metal insert is provided in the locking groove away from the pruning blade assembly. The metal socket communicates with the head assembly. By inserting the metal insert into the metal socket, the head assembly and the handle assembly are connected.

[0015] Furthermore, the main handle includes a connecting part and a handle part. The handle part is located at the rear end of the connecting part and extends obliquely backward. Its upper end is higher than the connecting part and its lower end is lower than the connecting part, forming a second ring-shaped handle with the grip center facing the axis of the connecting part. The second ring-shaped handle has a notch on its inner side away from the connecting part, and the main wrench is installed in the notch.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects:

[0017] (1) This utility model changes the traditional structure of the main and auxiliary handles and the machine housing of the pruning machine, which are all fixed along the circumference of the machine housing. The auxiliary handle is innovatively optimized to rotate along the circumference of the machine housing. In this way, when using the machine, as long as the main handle is turned, the machine housing will be rotated, which will in turn drive the machine head assembly and the pruning blade assembly installed on it to rotate. The other hand holding the auxiliary handle does not need to rotate with it and can always maintain a relatively comfortable angle, thereby achieving the purpose of more comfortable operation and reducing operator fatigue and discomfort.

[0018] (2) This utility model achieves coaxial connection between the main handle and the housing located at both ends of the auxiliary handle through the central tube. In addition to achieving the connection function, it can also serve as a reinforcing tube for the handle assembly, thereby improving the overall structural strength.

[0019] (3) This utility model provides two different auxiliary handle structures. When a tubular auxiliary handle is used, the operator holds it with his palm on the same axis as the machine casing, which allows for more precise control of the rotation angle. When a structure combining a tubular main body and a first ring handle is used, it is the same as the traditional grip posture, making it easier to use and not affected by the diameter of the central tube, making it more convenient to hold. In addition, the main body can move along the central tube axis to meet the needs of operators with different arm lengths.

[0020] (4) By designing the positions of the pruning blade assembly and the handle assembly, the pruning blade assembly is rotated along the axis perpendicular to the machine housing by rotating the machine head assembly, thus folding the pruning blade assembly to the bottom of the handle assembly, thereby reducing the external packaging size and facilitating transportation and storage.

[0021] (5) This utility model achieves the rotational connection between the head assembly and the housing by inserting the annular convex ridge into the annular groove, which is simple in structure.

[0022] (6) This utility model adopts a locking mechanism consisting of a locking button, a connecting column and a locking column. By pushing the locking button through the connecting column, the locking column is driven to move along the axial direction of the housing. At the same time, two locking grooves are provided that are aligned with the pruning blade assembly, so that the pruning blade can be fixed by the locking mechanism at both the open and folded positions.

[0023] (7) This utility model achieves circuit connection between the handle assembly and the rotating head assembly by adding interlocking metal inserts and metal sockets in the locking column and one of the locking slots, which solves the wiring problem of traditional wire connection and avoids the traditional wires from breaking due to repeated rotation, thus affecting normal use.

[0024] (8) The present invention optimizes the structure of the main handle to form an annular handle with an inclined setting and the grip center facing the axis of the handle assembly, which is more in line with ergonomics and ensures that the operator is in a more comfortable posture when holding it. Attached Figure Description

[0025] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0026] Figure 1 This is a perspective view of Example 1;

[0027] Figure 2 This is a schematic diagram of the internal structure of the handle assembly in Embodiment 1;

[0028] Figure 3 This is a schematic diagram of the internal structure of the casing in Example 1;

[0029] Figure 4 This is a partial structural diagram of Example 1;

[0030] Figure 5 This is a schematic diagram of the folded state in Example 1;

[0031] Figure 6 This is a schematic diagram of the structure of Example 2.

[0032] The labels in the attached diagram are:

[0033] Handle assembly 100, head assembly 200, pruning blade assembly 300;

[0034] 1. Housing, 1-1. Annular connecting part, 1-1-1. Annular groove, 1-2. Slide groove, 1-3. Front limit plate, 1-4. Rear limit plate, 2. Main handle, 2-1. Connecting part, 2-2. Handle, 3. Secondary handle, 3-1. Body, 3-2. First annular handle, 4. Main wrench, 5. Secondary wrench, 6. Center tube, 7. Annular protrusion, 8. Locking mechanism, 8-1. Locking button, 8-2. Connecting post, 8-3. Locking groove, 9. Metal insert, 10. Metal socket. Detailed Implementation

[0035] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0036] (Example 1)

[0037] like Figures 1 to 5 The pruning shears shown, which facilitate adjustment of the pruning angle, include a handle assembly 100, a head assembly 200, and a pruning blade assembly 300. The handle assembly 100 includes a housing 1, a main handle 2, and a secondary handle 3. The main handle 2 and secondary handle 3 are respectively equipped with a main wrench 4 and a secondary wrench 5. The main handle 2 is fixedly connected to the housing 1. The pruning blade assembly 300 is connected to the front end of the housing 1 via the head assembly 200 and is circumferentially fixed to the main handle 2. The secondary handle 3 is rotatable along the circumference of the housing 1. The main wrench 4 and secondary wrench 5 are electrically connected to the head assembly 200. The head assembly 200 contains a motor and a transmission component. By gripping the main and secondary handles, the main wrench 4 and secondary wrench 5 are triggered, activating the power supply and the motor. This, in turn, drives the pruning blade assembly 300 to move via the transmission component, achieving automatic pruning. When it is necessary to change the pruning angle, simply rotate the main handle 2 with one hand to drive the machine housing 1, the head assembly 200 and the pruning blade assembly 300 to rotate synchronously. At this time, the hand holding the auxiliary handle 3 can remain still, and a relatively comfortable angle can always be maintained, thereby achieving the purpose of more comfortable operation and reducing operator fatigue and discomfort.

[0038] Specifically, the handle assembly 100 also includes a central tube 6. The main handle 2 includes a connecting part 2-1 and a handle part 2-2. The connecting part 2-1 and the housing 1 are sleeved on both ends of the central tube 6 and fixed to the central tube 6 by screws. The auxiliary handle 3 is sleeved on the central tube 6 and located between the main handle 2 and the housing 1, and rotates with the central tube 6, the main handle 2, and the housing 1. The handle part 2-2 is located at the rear end of the connecting part 2-1 and extends backward at an angle. Its upper end is higher than the connecting part, and its lower end is lower than the connecting part, forming a second ring-shaped handle with the grip center facing the axis of the connecting part. The inner side of the second ring handle away from the connecting part has a notch, and the main wrench 4 is installed in the notch. This optimized main handle structure is more ergonomic and ensures that the operator is in a more comfortable posture when holding it. The auxiliary handle 3 is a tubular structure, with both ends extending to the connecting part 2-1 and the housing 1, respectively. The connecting part 2-1 and the housing 1 provide axial restraint for the auxiliary handle 3. A notch extending along the length direction is opened on the outer circumference of the auxiliary handle 3, and the auxiliary wrench 5 is installed in the notch. When in use, the operator holds it directly with the center of grip coaxial with the housing 1, which allows for more precise control of the rotation angle.

[0039] Considering the overall length of the pruning shears, which causes inconvenience during transportation and storage, this embodiment optimizes the connection between the head assembly 200 and the handle assembly 100 from a traditional fixed connection to a rotating connection. This allows the pruning blade assembly 300 to fold under the handle assembly 100, reducing the packaging size. Specifically, the straight sections of the pruning blade assembly 300 and the handle assembly 100 are parallel and offset from the bottom of the handle portion 2-2, ensuring sufficient clearance and avoiding interference during folding. An annular connecting portion 1-1 is provided at the end of the housing 1 furthest from the main handle 2. The inner ring of the annular connecting portion 1-1 has an annular groove 1-1-1. The head assembly 200 is interposed within the annular connecting portion 1-1, and its outer circumference has an annular protrusion 7 that matches the annular groove 1-1-1. The annular protrusion 7 is interposed within the annular groove 1-1-1, forming an axial limit on the head assembly 200, allowing the head assembly 200 to rotate and be mounted at the end of the housing 1 along an axis perpendicular to the housing 1.

[0040] To ensure safety and prevent the head assembly 200 from shaking during operation, this embodiment also provides a locking mechanism 8 between the head assembly 200 and the housing 1. The locking mechanism 8 includes a locking button 8-1 and a locking pin 8-2 that is axially movable within the housing 1. The outer peripheral surface of the head assembly 200 and the pruning blade assembly 100 are symmetrically provided with locking grooves 9 that are adapted to the end face of the locking pin 8-2 at the points where they are aligned along the length direction. The outer peripheral surface of the housing 1 is provided with a sliding groove 1-2, and a strip-shaped through groove is provided in the sliding groove. The locking button 8-1 is slidably disposed in the sliding groove 9 and connected to the locking pin 8-2 through a connecting pin 8-3 that passes through the strip-shaped through groove. The locking pin 8-2 has a front limiting plate 1-3 and a rear limiting plate 1-4 integrally formed with the housing 1 at both ends. When the locking button 8-1 is pushed forward, the front end of the locking pin 8-2 is engaged in the locking groove 9 until the front limiting plate 1-3 is limited by the stepped surface on the locking pin 8-2, indicating that the locking pin 8-2 is inserted to the bottom of the locking groove 9. At this time, the head assembly 200 is fixedly connected to the housing 1. When the locking button 8-1 is pushed backward, the front end of the locking pin 8-2 begins to disengage from the locking groove 9 until the rear limiting plate 1-3 contacts the rear end surface of the locking pin 8-2, indicating that the locking pin 8-2 is completely disengaged from the locking groove 9. At this time, the head assembly 200 is rotatably connected to the housing 1 and can be rotated and folded. After folding, when the locking button 8-1 is pushed forward again, the front end of the locking pin 8-2 is engaged in another symmetrically arranged locking groove 9, realizing the fixed connection between the head assembly 200 and the housing 1 in the folded state.

[0041] Due to the rotatable design of the head assembly 200, the traditional structure that directly connects the handle assembly and the head assembly with wires suffers from wiring difficulties and wear and breakage. Therefore, this embodiment provides a groove at the front end of the locking pin 8-2, with a metal insert 10 that communicates with the handle assembly 100 embedded within the groove. A metal socket 11 matching the metal insert 10 is provided in the locking groove away from the pruning blade assembly 300. The metal socket 11 communicates with the motor of the head assembly. By inserting the metal insert 10 into the metal socket 11, the wiring between the head assembly and the handle assembly is completed, eliminating the need for a transmission wire structure.

[0042] (Example 2)

[0043] The structure of this embodiment is similar to that of embodiment 1, except that the structure of the secondary handle 3 is different, such as... Figure 6 As shown, the secondary handle 3 includes a tubular body 3-1 and a first annular handle 3-2 fixed to the outer periphery of the body 3-1. The body 3-1 is fitted onto the central tube 6 with a gap. The first annular handle 3-2 has a notch on the inner side of the body 3-1, and the secondary wrench 5 is installed in the notch. This structure of the secondary handle 3 is similar to the traditional structure. When using it, the operator's grip posture is the same as the traditional grip posture, making it more convenient to use and unaffected by the diameter of the central tube, making it easier to hold. Preferably, the length of the body 3-1 is less than the distance between the main handle 2 and the housing 1, allowing the body to move axially along the central tube to accommodate operators with different arm lengths.

[0044] This invention changes the traditional structure of pruning machines where the main and auxiliary handles are fixed to the machine housing along the circumference. It innovatively optimizes the auxiliary handle so that it rotates circumferentially with the housing. In use, simply rotating the main handle rotates the housing, which in turn rotates the head assembly and pruning blade assembly mounted on it. The other hand holding the auxiliary handle does not need to rotate with it, maintaining a comfortable angle and thus achieving more comfortable operation, reducing operator fatigue and discomfort. Simultaneously, the head assembly can rotate relative to the handle assembly, reducing the machine's length and packaging size, allowing for a larger packing capacity.

[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pruning shear with an adjustable cutting angle, comprising a handle assembly, a head assembly and a pruning blade assembly, the handle assembly comprising a housing and a main handle and a sub-handle respectively provided with a main trigger and a sub-trigger, characterized in that: The main handle is fixedly connected to the housing, the auxiliary handle is rotatably arranged along the circumference of the housing, and the pruning blade assembly is connected to the end of the housing through the head assembly and is circumferentially fixed with the main handle.

2. The pruning shears for easy adjustment of the pruning angle according to claim 1, characterized in that: The handle assembly also includes a central tube, with the main handle and housing sleeved at both ends of the central tube and fixedly connected to the central tube. The auxiliary handle is sleeved on the central tube and located between the main handle and the housing, and rotates in cooperation with the central tube, the main handle, and the housing.

3. The pruning shears for easy adjustment of the pruning angle according to claim 2, characterized in that: The auxiliary handle is a tubular structure with its two ends extending to the main handle and the housing, respectively. The auxiliary handle is axially limited by the end faces of the main handle and the housing. A notch extending along the length direction is opened on the outer peripheral surface of the auxiliary handle, and the auxiliary wrench is installed in the notch.

4. The pruning shears for easy adjustment of the pruning angle according to claim 2, characterized in that: The secondary handle includes a tubular body and a first annular handle fixed to the outer periphery of the body. The body is fitted onto the central tube with a gap. The first annular handle has a notch on the inner side of the body, and the secondary wrench is installed in the notch.

5. The pruning shears for easy adjustment of the pruning angle according to claim 4, characterized in that: The length of the main body is less than the distance between the main handle and the housing.

6. A pruning shears with an adjustable pruning angle according to any one of claims 1 to 5, characterized in that: The straight section of the pruning blade assembly is parallel to the handle assembly and offset from the bottom of the main handle. The head assembly is rotatably mounted on the end of the housing along an axis perpendicular to the housing and is connected to the housing by a locking mechanism.

7. A pruning shears with an adjustable pruning angle according to claim 6, characterized in that: The end of the housing away from the main handle is provided with an annular connecting part. The inner ring of the annular connecting part is provided with an annular groove. The head assembly is inserted into the annular connecting part with a gap, and the outer circumferential surface is provided with an annular protrusion that matches the annular groove. The annular protrusion is fitted into the annular groove with a gap, forming an axial limit on the head assembly.

8. A pruning shears with an adjustable pruning angle according to claim 6, characterized in that: The locking mechanism includes a locking button and a locking pin axially movable within the housing. The outer peripheral surface of the head assembly and the pruning blade assembly are symmetrically provided with locking grooves that fit the end face of the locking pin. The outer peripheral surface of the housing is provided with a sliding groove, and a strip-shaped through groove is formed in the sliding groove. The locking button is slidably disposed in the sliding groove and connected to the locking pin through the strip-shaped through groove. The head assembly is adapted to drive the locking pin to insert into and disengage from the locking groove by pushing the locking button to form locking and unlocking with the housing.

9. A pruning shears with an adjustable pruning angle according to claim 8, characterized in that: The locking pin has a groove at one end near the head assembly, and a metal insert that communicates with the handle assembly is embedded in the groove. The locking slot away from the pruning blade assembly has a metal socket that matches the metal insert. The metal socket communicates with the head assembly. By inserting the metal insert into the metal socket, the head assembly and the handle assembly are connected.

10. A pruning shears with an adjustable pruning angle according to claim 6, characterized in that: The main handle includes a connecting part and a handle part. The handle part is located at the rear end of the connecting part and extends obliquely backward. Its upper end is higher than the connecting part and its lower end is lower than the connecting part, forming a second ring-shaped handle with the grip center facing the axis of the connecting part. The second ring handle has a notch on its inner side away from the connecting part, and the main wrench is installed in the notch.

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