Hedge trimmer and long-reach hedge trimmer

Abstract

A hedge trimmer, comprising: a main housing, provided with an accommodating space; first and second blades, comprising multiple cutting edges and mounted on a support rod extending forward from a front end of the main housing; a motor, disposed in the accommodating space and configured to drive, by means of a transmission device, the first and second blades to move relative to each other to implement cutting; a power supply device, configured to at least supply power to the motor; and at least two vibration damping elements, wherein some vibration damping elements among the at least two vibration damping elements have a first vibration damping position, the remaining vibration damping elements have a second vibration damping position, and a ratio of the lateral distance between the first vibration damping position and the second vibration damping position in the front-back direction to the longitudinal distance between the first vibration damping position and the second vibration damping position in the up-down direction is greater than or equal to 3.5 and less than or equal to 14.

Description

Pruning machine and long-stem pruning machine

[0001] This application claims priority to Chinese Patent Application No. 202411638730.4, filed with the Chinese Patent Office on November 15, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of power tool technology, such as a pruning machine and a long-handled pruning machine. Background Technology

[0003] A pruning machine is a common gardening tool. Its blades reciprocate under motor drive to cut shrubs, hedges, and other vegetation. Users can hold the front and rear handles of the pruning machine with both hands for relatively stable movement and to adjust the cutting position. To meet the ever-increasing performance requirements and user expectations of pruning machines, a key challenge lies in vibration reduction.

[0004] This section provides background information related to this application, which is not necessarily prior art. Summary of the Invention

[0005] This application addresses or at least mitigates some or all of the aforementioned problems. Therefore, this application provides a pruning machine and a long-stem pruning machine.

[0006] A pruning machine includes: a main housing having a receiving space; a first blade and a second blade having multiple cutting edges, mounted on a support rod extending forward from the front end of the main housing; a motor disposed within the receiving space and configured to drive the first blade and the second blade to move relative to each other via a transmission device to perform cutting; a power supply device configured to supply power to at least the motor; the pruning machine further includes at least two vibration damping elements, a portion of which has a first vibration damping position, and the remaining vibration damping elements have a second vibration damping position, wherein the ratio of the lateral distance between the first vibration damping position and the second vibration damping position in the front-back direction to the longitudinal distance in the vertical direction is greater than or equal to 3.5 and less than or equal to 14.

[0007] In some embodiments, the vibration damping element located in front of the center of gravity of the pruning machine has a first vibration damping position, and the vibration damping element located behind the center of gravity of the pruning machine has a second vibration damping position. In some embodiments, the ratio of the lateral distance to the longitudinal distance is greater than or equal to 8 and less than or equal to 12.

[0008] In some embodiments, the first damping position and the second damping position are not on the same horizontal line.

[0009] In some embodiments, the lateral distance is greater than or equal to 50 mm and less than or equal to 180 mm.

[0010] In some embodiments, the longitudinal distance is greater than or equal to 5 mm and less than or equal to 100 mm.

[0011] In some embodiments, the angle between the line connecting the first damping position and the second damping position and the extension direction of the motor shaft is greater than or equal to 25° and less than or equal to 87°.

[0012] In some embodiments, the angle between the line connecting the first damping position and the second damping position and the blade extension direction is greater than or equal to 3° and less than or equal to 65°.

[0013] In some embodiments, the first damping position of at least two damping elements located in front of the center of gravity of the pruning machine is the centroid of the damping element; the second damping position of at least two damping elements located behind the center of gravity of the pruning machine is the centroid of the damping element.

[0014] In some embodiments, the output shaft speed of the pruning machine is greater than or equal to 800 rpm and less than or equal to 3000 rpm.

[0015] In some embodiments, the total weight of the pruning machine is greater than or equal to 3 kg and less than or equal to 6 kg.

[0016] In some embodiments, the first weight of the pruning machine is greater than or equal to 1.2 kg and less than or equal to 3 kg, and the first weight includes the weight of the first blade, the second blade, the motor, and the transmission device.

[0017] In some embodiments, the ratio of the distance from the first damping position to the first center of gravity to the distance to the center of gravity of the whole machine in the front-rear direction is greater than or equal to 0.1 and less than or equal to 4.5, and the first center of gravity is the center of gravity corresponding to the first weight.

[0018] In some embodiments, the ratio of the distance from the second damping position to the first center and the distance to the center of gravity of the whole machine in the front-rear direction is greater than or equal to 2 and less than or equal to 10.

[0019] In some embodiments, the damping element includes an elastic element, which includes a rubber material and / or a foam material.

[0020] In some embodiments, at least one damping element is disposed between the transmission device and the main housing.

[0021] In some embodiments, the pruning machine also has a front handle located on the front side of the main housing, and at least one damping element is disposed near the junction of the front handle and the main housing.

[0022] In some embodiments, the transmission device drives the first and second blades to move relative to each other via an eccentric wheel or a crank rocker arm.

[0023] A pruning machine includes: a main housing having a receiving space; a first blade and a second blade having multiple cutting edges, mounted on a support rod extending forward from the front end of the main housing; a motor disposed within the receiving space and configured to drive the first blade and the second blade to move relative to each other via a transmission device to perform cutting; a power supply device configured to supply power to at least the motor; the pruning machine further includes at least two vibration damping elements, the ratio of the maximum longitudinal distance between the at least two vibration damping elements in the front-to-back direction to the maximum lateral distance in the vertical direction being greater than or equal to 3.5 and less than or equal to 14.

[0024] In some embodiments, the device further includes: a second type of damping element disposed between the gearbox or motor housing and the main housing; the second type of damping element includes a flat pad whose plane is perpendicular to the vertical direction.

[0025] In some embodiments, one or more vibration damping elements located on the front side of the center of gravity of the pruning machine have a first vibration damping position, the first vibration damping position being the centroid of one or more vibration damping elements on the front side of the center of gravity of the pruning machine; one or more vibration damping elements located on the rear side of the center of gravity of the pruning machine have a second vibration damping position, the second vibration damping position being the centroid of one or more vibration damping elements on the front side of the center of gravity of the pruning machine.

[0026] A long-pole pruning machine includes: a connecting rod; a main housing disposed at one end of the connecting rod and forming a receiving space; a first blade and a second blade having multiple cutting edges, mounted on a support rod extending forward from the front end of the main housing; a motor disposed within the receiving space and configured to drive the first blade and the second blade to move relative to each other via a transmission device to perform cutting; a power supply device configured to supply power to at least the motor; the long-pole pruning machine further includes at least two vibration damping elements, some of which have a first vibration damping position, and the remaining vibration damping elements have a second vibration damping position, wherein the ratio of the lateral distance between the first vibration damping position and the second vibration damping position in the front-back direction to the longitudinal distance in the vertical direction is greater than or equal to 3.5 and less than or equal to 14. Attached Figure Description

[0027] Figure 1 is a perspective view of a pruning machine as an embodiment of this application;

[0028] Figure 2 is a plan view of part of the internal structure of the pruning machine shown in Figure 1 in one embodiment;

[0029] Figure 3 is a plan view of part of the internal structure of the pruning machine shown in Figure 1 in another embodiment;

[0030] Figure 4 is a plan view of two vibration damping elements of the pruning machine shown in Figure 1 in one embodiment;

[0031] Figure 5 is a plan view of three vibration damping elements of the pruning machine shown in Figure 1 in another embodiment;

[0032] Figure 6 is a schematic diagram of the first vibration damping position, the second vibration damping position, and their lateral and longitudinal distances, etc., of the pruning machine as an embodiment of this application;

[0033] Figure 7 is a schematic diagram showing the change in vibration reduction effect when the vibration reduction position of the pruning machine in this application moves back and forth or up and down;

[0034] Figure 8 is a schematic diagram showing the changes in vibration reduction effect of the pruning machine under different rotation speeds and different blade masses in this application;

[0035] Figure 9 shows some data on the ratio of the horizontal to the vertical distance of the vibration reduction position of the pruning machine in this application and the corresponding vibration reduction effect.

[0036] Figure 10 is a perspective view of the vibration damping element and the second type of vibration damping component in one embodiment of the pruning machine shown in Figure 1;

[0037] Figure 11 is a perspective view of a long-pole pruning machine as an embodiment of this application;

[0038] Figure 12 is a schematic diagram of the vibration damping elements, the first vibration damping position, the second vibration damping position, and their lateral and longitudinal distances in the long-pole pruning machine shown in Figure 11. Detailed Implementation

[0039] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0040] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0041] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0042] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0043] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0044] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0045] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0046] In this application, the terms "controller," "processor," "central processing unit," "CPU," and "MCU" are used interchangeably. When using the unit "controller," "processor," "central processing unit," "CPU," or "MCU" to perform a specific function, unless otherwise stated, these functions may be performed by a single or multiple of the aforementioned units.

[0047] In this application, the terms "device," "module," or "unit" are used to describe devices that can be implemented in hardware or software to perform a specific function.

[0048] In this application, the terms “calculation,” “judgment,” “control,” “determine,” “identify,” etc., refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0049] The technical solution proposed in this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Referring to Figure 1, a pruning machine 100 as an embodiment of this application is shown. Figure 1 also defines six directions of the pruning machine 100 in this application: up, down, front, back, left, and right.

[0051] As shown in Figure 1, the pruning machine 100 includes a main housing 110, a cutting device, and a motor 130. The main housing 110 forms the main body of the pruning machine 100, and its interior has a receiving space. The main housing 110 provides support, connection, fixation, limiting, and housing for the various components described below. The main housing 110 can be separate, for example, formed by joining left and right housings, or it can be a single piece. The main housing 110 generally also has a grip or handle for the user to hold. In some embodiments, the pruning machine 100 has a first grip formed at the rear of the main housing 110, which serves as a rear handle 111, and a front handle 112 located at the front of the main housing 110, which serves as a second grip. When using the pruning machine 100, the user can hold the front handle 112 and the rear handle 111 with both hands respectively to achieve more stable cutting.

[0052] The cutting device is the component that actually performs the cutting operation in the pruning machine 100. It may include a first blade 121, a second blade 122, and a support rod 123. The support rod 123 is connected to the main housing 110 of the pruning machine 100 and extends forward beyond the front end of the main housing 110. The first blade 121 and the second blade 122 are mounted on the support rod 123. Both have multiple cutting edges arranged in a front-rear direction and extending in their respective cutting planes. When the pruning machine 100 is working, the first blade 121 and the second blade 122 will form parallel cutting planes in the vegetation. In some embodiments, the cutting device generally also includes a protective element such as a guard.

[0053] Motor 130 is the prime mover of pruning machine 100 and can be housed within the housing space of main casing 110. When the motor shaft rotates, it indirectly drives the cutting device to perform cutting operations through transmission device 131. Specifically, the transmission device 131 includes an eccentric mechanism that converts the rotational motion of the motor shaft into the reciprocating motion of the first blade 121 and the second blade 122, thereby driving the first blade 121 and the second blade 122 to perform cutting. In some embodiments, motor 130 can be a DC motor, a brushless motor, or a sensorless motor. The arrangement of motor 130 in pruning machine 100 includes, but is not limited to, vertical extension, that is, the motor shaft extends in the vertical direction. Of course, this is not absolute.

[0054] Referring to Figures 2 and 3, the transmission device 131 of the pruning machine 100 has a variety of selectable implementation methods. In some embodiments, as shown in Figure 2, the transmission device 131 can use an eccentric wheel direct drive to drive the relative movement of the first blade 121 and the second blade 122. In other embodiments, as shown in Figure 3, the transmission device 131 can also use a crank rocker to drive the relative movement of the first blade 121 and the second blade 122.

[0055] The pruning machine 100 includes a main housing 110, a cutting device, a transmission device 131, and a motor 130, as well as a power supply device 200. The power supply device 200 can supply power to at least the motor 130, and can also supply power to the controller or other components and their related circuits. Specifically, a drive circuit is provided between the power supply device 200 and the motor 130, and the electrical energy provided by the power supply device 200 can be transmitted to the motor 130 through the drive circuit via a DC bus. In some embodiments, the power supply device 200 is a battery pack, which is detachably connected to the pruning machine 100, and a battery mounting portion is formed on the main housing 110 for the battery pack to be installed and removed. In other embodiments, the pruning machine 100 can also use AC power such as mains power in conjunction with a power adapter or related circuits such as transformers, rectifiers, and voltage regulators to achieve power supply.

[0056] In this application, the overall weight of the pruning machine 100 is defined as the weight of all components, including the aforementioned power supply device 200, and the overall center of gravity G is the center of gravity of all components corresponding to the overall weight. The aforementioned cutting device, transmission device 131, and motor 130 constitute the "inner chamber" of the pruning machine 100, and the sum of their weights is the first weight of the pruning machine 100, with the first center of gravity G1 being the center of gravity of the "inner chamber" component corresponding to the first weight.

[0057] Following on from the previous text, one of the challenges in designing the pruning machine 100 is vibration reduction. To solve or alleviate this problem, this application will add multiple vibration damping elements 140 to the pruning machine 100. Research and practice have shown that the placement of the vibration damping elements 140 has a significant impact on their vibration damping effect. The same vibration damping element 140 placed in different positions has a significant difference in vibration damping effect, which will be elaborated in detail later.

[0058] In addition to the main housing 110, cutting device, transmission device 131, motor 130 and power supply device 200, the pruning machine 100 also includes at least two vibration damping elements 140, which are disposed within the receiving space of the main housing 110. Some of the at least two vibration damping elements 140 have a first vibration damping position P1, while the remaining vibration damping elements have a second vibration damping position P2. In some embodiments, the vibration damping positions of the multiple vibration damping elements 140 can be their centroids; in other embodiments, the vibration damping positions of the multiple vibration damping elements 140 can be new coordinate points formed by their extreme positions in the front-back, up-down, and left-right directions. For example, the first vibration damping position P1 (x1, z1) can be formed by the coordinate value x1 of the foremost vibration damping element in the front-back direction and the coordinate value z1 of the bottommost vibration damping element in the up-down direction. The second vibration damping position P2 (x2, z2) can be formed by the coordinate value x2 of the last remaining vibration damping element in the front-back direction and the coordinate value z2 of the topmost remaining vibration damping element in the up-down direction. Of course, in other embodiments, the first and second vibration damping positions P1 and P2 can be determined in more ways.

[0059] In some embodiments, referring to Figures 4 to 6, one or more of the at least two vibration damping elements 140 are disposed on the front side of the overall center of gravity G of the pruning machine 100, and the remaining one or more are disposed on the rear side of the overall center of gravity G of the pruning machine 100. In this application, one or more vibration damping elements 140 located on the front side of the overall center of gravity G of the pruning machine 100 have a first vibration damping position P1, while one or more vibration damping elements 140 located on the rear side of the overall center of gravity G of the pruning machine 100 have a second vibration damping position P2. The first vibration damping position P1 is the centroid of one or more front vibration damping elements 140, and similarly, the second vibration damping position P2 is the centroid of one or more rear vibration damping elements 140. In some embodiments, as shown in FIG4, the pruning machine 100 is provided with a first vibration damping element 141 and a second vibration damping element 142. The first vibration damping element 141 is located in front of the machine's center of gravity G, and the second vibration damping element 142 is located behind the machine's center of gravity G. Therefore, the position of the first vibration damping element 141 is the first vibration damping position P1, and the position of the second vibration damping element 142 is the second vibration damping position P2. In other embodiments, as shown in FIG5, the pruning machine 100 is provided with a first vibration damping element 141, a second vibration damping element 142, and a third vibration damping element 143. The first vibration damping element 141 is located in front of the machine's center of gravity G, and the second and third vibration damping elements 143 are located behind the machine's center of gravity G. Therefore, the position of the first vibration damping element 141 is the first vibration damping position P1, and the midpoint of the line segment connecting the positions of the second and third vibration damping elements 143 is the second vibration damping position P2. In the case of a larger number of damping elements 140, the specific process for determining the first damping position P1 and the second damping position P2 can be deduced from the preceding text and will not be repeated here. Of course, in other embodiments, the damping elements 140 corresponding to the first and second damping positions P1 and P2 may not be divided based on their location before or after the center of gravity of the whole machine. For example, they may be divided based on their location before or after the motor axis.

[0060] In some embodiments, a vibration damping element 140 may include one or more damping components. Specifically, the vibration damping elements 140 are applied in pairs, with each of the first vibration damping element 141, the second vibration damping element 142, or the third vibration damping element 143 including a pair of damping components. The vibration damping elements 140 are mounted on the main housing 110, which may be formed by merging left and right housings. The pair of damping components included in each vibration damping element 140 are respectively connected to the left and right housings. When the main housing 110 is merged, the vibration damping elements are also merged. In some embodiments, the vibration damping element 140 includes an elastic element, specifically, it may be a damping pad, damping sleeve, etc., made of rubber material, foam material, etc., or it may include elements such as springs. In some embodiments, the vibration damping elements 140 at different positions may be made of different materials. Specifically, the material stiffness of the front vibration damping element 140 and the rear vibration damping element 140 may be different. In some embodiments, the stiffness of the vibration damping element 140 may be greater than or equal to 10 N / mm and less than or equal to 30 N / mm. In some embodiments, the stiffness of the vibration damping element 140 is greater than or equal to 10 N / mm and less than or equal to 20 N / mm.

[0061] In some embodiments, as shown in Figures 4 to 6, at least one of the vibration damping elements 140 may be disposed near the connection between the front handle 112 and the main housing 110, specifically, it may be connected to a mounting bracket of the front handle 112 on the main housing 110. In other embodiments, at least one of the vibration damping elements 140 may be disposed between the main housing 110 and an inner housing, such as a gearbox, that houses or partially houses the transmission device 131. In still other embodiments, at least one of the vibration damping elements 140 may be disposed between the main housing 110 and a motor housing that houses or partially houses the motor 130; furthermore, in addition to the above-mentioned locations, the vibration damping elements 140 may also be disposed at other locations that can effectively isolate vibration and reduce vibration interference.

[0062] After clarifying the vibration damping element 140 and its position in this application, referring to Figure 7, it can be observed that, assuming the second vibration damping position P2 of the pruning machine 100 remains unchanged, when the first vibration damping position P1 moves back and forth, the handle vibration has a smaller value in some ranges, meaning the vibration damping effect is better; when the first vibration damping position P1 moves up and down, the handle vibration also has a smaller value in some ranges, meaning the vibration damping effect is better. Furthermore, assuming the first vibration damping position P1 of the pruning machine 100 remains unchanged, when the second vibration damping position P2 moves up and down, the handle vibration also has a smaller value in some ranges. Therefore, it can be preliminarily determined that adjusting the ratio of the horizontal and vertical distances of the first and second vibration damping positions P1 and P2 in the pruning machine 100 can yield a better vibration damping and noise reduction result. It should be noted that, although in Figure 7, as the first damping position P1 moves backward and the lateral distance between the first and second damping positions P1 and P2 decreases, and as the first damping position P1 moves downward and the longitudinal distance between the first and second damping positions P1 and P2 increases, the handle vibration tends to gradually decrease; and as the second damping position P2 moves downward and the longitudinal distance between the first and second damping positions P1 and P2 decreases, the handle vibration tends to first decrease and then increase; however, such single-direction adjustments often cannot accurately characterize the pruning machine. The optimal solution that can be achieved by vibration reduction is 100. Furthermore, the analysis shows that the first center of gravity G1, the first vibration reduction position P1, the overall center of gravity G, and the second vibration reduction position P2 are distributed sequentially along the front-back direction. Reducing the lateral distance between the first and second vibration reduction positions P1 and P2 can optimize the vibration of the pruning machine 100 to a certain extent. However, the reduced lateral distance will strengthen the torsional displacement brought about by the first center of gravity G1, causing the pruning machine 100 to shake and its controllability to deteriorate. Similarly, the adjustment of the longitudinal distance will also be related to the torsional displacement brought about by the rotation of the motor 130.

[0063] Referring to Figure 9, it shows partial data on the lateral distance L1 and longitudinal distance H1 between the first vibration damping position P1 and the second vibration damping position P2 of the pruning machine 100 in this application, as well as their ratio and the corresponding vibration damping effect. In this application, as shown in Figures 4 to 6, the ratio between the lateral distance L1 of the first vibration damping position P1 and the second vibration damping position P2 in the front-to-back direction and the longitudinal distance H1 of the first vibration damping position P1 and the second vibration damping position P2 in the vertical direction is greater than or equal to 3.5 and less than or equal to 14, so that the pruning machine 100 has a better vibration damping and noise reduction effect. In actual tests, under the condition that other conditions remain unchanged, the above-mentioned lateral and longitudinal distance ratio can reduce the handle vibration of the pruning machine 100 by up to 35% and the overall machine noise by 3.5 dB.

[0064] In some embodiments, the ratio of the lateral distance L1 to the longitudinal distance H1 is greater than or equal to 3.5 and less than or equal to 6. In some embodiments, the ratio of the lateral distance L1 to the longitudinal distance H1 is greater than or equal to 3.5 and less than or equal to 4.5. In some embodiments, the ratio of the lateral distance L1 to the longitudinal distance H1 is greater than or equal to 5 and less than or equal to 12. In some embodiments, the ratio of the lateral distance L1 to the longitudinal distance H1 is greater than or equal to 5 and less than or equal to 10. Preferably, the ratio of the lateral distance L1 to the longitudinal distance H1 is greater than or equal to 8 and less than or equal to 12.

[0065] In some embodiments, as shown in Figures 4 to 6, the lateral distance L1 between the first damping position P1 and the second damping position P2 in the pruning machine 100 is greater than or equal to 50 mm and less than or equal to 180 mm. In some embodiments, the lateral distance L1 is greater than or equal to 60 mm and less than or equal to 150 mm. In some embodiments, the lateral distance L1 is greater than or equal to 75 mm and less than or equal to 205 mm. In some embodiments, the lateral distance L1 can be 75 mm, 80 mm, 105 mm, 120 mm, or 145 mm.

[0066] In some embodiments, the first damping position P1 and the second damping position P2 of the pruning machine 100 are not on the same horizontal line. That is, the longitudinal distance H1 between the first damping position P1 and the second damping position P2 is not 0. As mentioned above, as shown in Figures 7 to 9, if the two are set on the same horizontal line, it will be difficult to eliminate the adverse torsional displacement caused by the rotation of the motor 130.

[0067] In some embodiments, as shown in Figures 4 to 6, the longitudinal distance H1 between the first damping position P1 and the second damping position P2 in the pruning machine 100 is greater than or equal to 5 mm and less than or equal to 100 mm. In some embodiments, the longitudinal distance H1 is greater than or equal to 10 mm and less than or equal to 20 mm. In some embodiments, the longitudinal distance H1 is greater than or equal to 20 mm and less than or equal to 30 mm.

[0068] In some embodiments, as shown in Figures 4 to 6, the ratio of the distance L11 from the first vibration-damping position P1 of the pruning machine 100 to the first center of gravity G1 in the front-rear direction to its distance L12 from the center of gravity G of the whole machine is greater than or equal to 0.1 and less than or equal to 4.5. In some embodiments, the ratio of the distance L21 from the second vibration-damping position P2 of the pruning machine 100 to the first center of gravity G1 in the front-rear direction to its distance L22 from the center of gravity G of the whole machine is greater than or equal to 2 and less than or equal to 10.

[0069] Following the preceding text, the vibration damping effect achieved by the deployment and adjustment of the vibration damping element 140 and its position is related to the torsional displacement caused by the blade (inner tube) and the motor 130. In some embodiments, as shown in Figures 4 to 6, the angle (acute angle / right angle value) between the line l01 connecting the first and second vibration damping positions P1 and P2 of the pruning machine 100 and the blade extension direction l02 is greater than or equal to 3° and less than or equal to 65°. In some embodiments, the angle between the line l01 connecting the first and second vibration damping positions P1 and P2 and the blade extension direction l02 is greater than or equal to 4° and less than or equal to 10°. In some embodiments, the angle (acute angle / right angle value) between the line l01 connecting the first and second vibration damping positions P1 and P2 of the pruning machine 100 and the motor shaft extension direction l03 is greater than or equal to 25° and less than or equal to 87°. In some embodiments, the angle between the line l01 connecting the first and second damping positions P1 and P2 and the extension direction l03 of the motor shaft is greater than or equal to 80° and less than or equal to 86°. In some embodiments, the first blade 121 and the second blade 122 of the pruning machine 100 extend in the front-rear direction, and the motor shaft of the pruning machine 100 extends in the vertical direction. In some embodiments, the extension direction of the blades of the pruning machine 100 is substantially perpendicular to the extension direction of the motor shaft.

[0070] In some embodiments, the vibration damping element 140 can achieve different vibration damping effects when arranged in different forms and directions, as shown in Figures 4 to 6. The vibration damping element 140 described above can be in the form of a vibration damping ring, sleeved along the left-right direction on the protrusions of the main housing 110, gearbox, motor housing, and other components inside the pruning machine 100 for installation. In this manner, the vibration damping element 140 can play a vibration damping role in multiple directions, and can effectively achieve the vibration damping effect that can be achieved by the horizontal and vertical distance ratio between the vibration damping positions described above. In order to enhance the vibration damping effect in a specific direction, based on the vibration damping element 140 described above, in some embodiments, referring to Figure 10, the pruning machine 100 also includes a second type of vibration damping element 144, which can be arranged in the form of a flat pad with its plane perpendicular to the vertical direction between the gearbox or motor housing and the main housing 110 inside the pruning machine 100. For example, the flat pad can be filled between the upper and lower end faces of the gearbox and the main housing to further improve the vertical vibration inside the pruning machine 100.

[0071] Referring to Figure 8, the vibration of the pruning machine 100 is related to its output shaft speed and the weight of the blades (or inner tube). As shown in Figure 8, the handle vibration increases with the increase of the output shaft speed of the pruning machine 100; the handle vibration also increases with the increase of the blade mass of the pruning machine 100. Furthermore, under the condition of equal magnification of the independent variable, the influence of the output shaft speed on the vibration of the pruning machine 100 is much greater than the influence of the blade mass on the vibration of the pruning machine 100. In some embodiments, the output shaft speed of the pruning machine 100 is greater than or equal to 800 rpm and less than or equal to 3000 rpm. In some embodiments, the output shaft speed of the pruning machine 100 is greater than or equal to 1200 rpm and less than or equal to 4000 rpm. In some embodiments, the output shaft speed of the pruning machine 100 is greater than or equal to 1500 rpm and less than or equal to 2300 rpm. In some embodiments, the weight of the inner tube of the pruning machine 100 is greater than or equal to 1.2 kg and less than or equal to 3 kg, and the total weight of the machine is greater than or equal to 3 kg and less than or equal to 6 kg. In some embodiments, the inner liner of the pruning machine 100 weighs more than or equal to 1.5 kg and less than or equal to 2 kg, and the weight of the whole machine is more than or equal to 4 kg and less than or equal to 5 kg.

[0072] In another alternative implementation, the optimization of the vibration reduction effect of the pruning machine 100 can also be related to the ratio of the maximum lateral distance of the plurality of vibration damping elements 140 in the front-to-back direction and the maximum longitudinal distance in the vertical direction. Following the previous description, the ratio of the maximum lateral distance to the maximum longitudinal distance of the plurality of vibration damping elements 140 in the pruning machine 100 is greater than or equal to 3.5 and less than or equal to 14. In some embodiments, the ratio of the maximum lateral distance to the maximum longitudinal distance is greater than or equal to 3.5 and less than or equal to 4.5. In some embodiments, the ratio of the maximum lateral distance to the maximum longitudinal distance is greater than or equal to 5 and less than or equal to 12. In some embodiments, the ratio of the maximum lateral distance to the maximum longitudinal distance is greater than or equal to 5 and less than or equal to 10. In some embodiments, the ratio of the maximum lateral distance to the maximum longitudinal distance is greater than or equal to 8 and less than or equal to 12.

[0073] Furthermore, the technical solution described above can also be applied to the long-handled pruning machine 100B. The long-handled pruning machine 100B can be considered as one type of the pruning machine 100 of this application. Compared to the pruning machine 100 in Figure 1, it also has a connecting rod 113, which can optionally be a telescopic rod, allowing the height of the working area of ​​the blade at the front end of the connecting rod 113 to be adjusted. This application correspondingly proposes a long-handled pruning machine 100B. Referring to Figures 10 and 11, the long-handled pruning machine 100B includes a main housing 110, a handle 114, and a connecting rod 113 connecting the two. The main housing 110, located at one end of the connecting rod 113, also forms a receiving space, in which a motor 130 is housed. The handle 114, located at the other end of the connecting rod 113, is for the user to grip, and optionally, a power supply device 200, such as a battery pack, can be installed at the bottom.

[0074] The long-handled pruning machine 100B also includes a first blade 121 and a second blade 122 with multiple cutting edges, which are mounted on a support rod 123 extending forward from the front end of the main housing 110. That is, the support rod 123 and the first and second blades 121 mounted thereon extend from the front end of the main housing 110, located at the front end of the connecting rod 113. A motor 130, housed within the main housing 110, drives the relative movement of the first and second blades 121 and 122 via a transmission device 131 to perform cutting. A power supply device 200, such as a battery pack, detachably mounted to the long-handled pruning machine 100B, can at least power the motor 130 to perform the pruning work.

[0075] The long-pole pruning machine 100B of this application also includes at least two vibration damping elements 140. A portion of these vibration damping elements 140 has a first vibration damping position, while the remaining vibration damping elements 140 have a second vibration damping position. The ratio of the lateral distance between the first and second vibration damping positions in the front-to-back direction to their longitudinal distance in the vertical direction is greater than or equal to 3.5 and less than or equal to 14.

[0076] As shown in Figure 11, two vibration damping elements 140, namely a first vibration damping element 141 and a second vibration damping element 142, are used for illustrative purposes. The position of the first vibration damping element 141, which is located in the foreground direction, is the first vibration damping position P1, and the position of the second vibration damping element 142, which is located in the background direction, is the second vibration damping position P2. The ratio L1 of the lateral distance L1 between the first vibration damping position P1 and the second vibration damping position P2, and H1 of the longitudinal distance H1 between the first vibration damping position P1 and the second vibration damping position P2, is greater than or equal to 3.5 and less than or equal to 14. In some embodiments, the ratio L1 / H1 is greater than or equal to 8 and less than or equal to 12. In some embodiments, the aforementioned vibration damping element 140 includes an elastic element, which, exemplarily, includes rubber material and / or foam material.

[0077] In some embodiments, the long-pole pruning machine 100B also includes a second type of vibration damper 144, which may be arranged between the gearbox or motor housing and the main housing 110. This includes, but is not limited to, clamping a flat pad whose plane is perpendicular to the vertical direction at the aforementioned location. The material used is also a material with a certain degree of elasticity and vibration damping / isolation function. In some embodiments, the second type of vibration damper 144 performs vibration damping / isolation tasks with fewer directional degrees of freedom than the vibration damping element 140. For example, it may only supplement the existing solution in the vertical direction with vibration damping / isolation, while the vibration damping element 140 may optionally be considered as providing vibration damping / isolation in six directions.

[0078] Understandably, the vibration damping elements, vibration damping positions, lateral distances, longitudinal distances, and other related vibration damping schemes in the pruning machine 100 described above, as well as the values ​​of related parameters such as the rotation speed and weight of the pruning machine 100, can all be incorporated into the long-handled pruning machine 100B to comprehensively further optimize the long-handled pruning machine 100B, provided that they do not contradict the characteristics of the long-handled pruning machine 100B.

[0079] The technical effects of this application include at least optimizing the vibration reduction effect of the pruning machine and the long-pole pruning machine by selecting the ratio of the lateral distance to the longitudinal distance between the vibration reduction positions divided by the standard of the front and rear of the center of gravity of the whole machine, which is equivalent to the vibration reduction element in the pruning machine and the long-pole pruning machine.

[0080] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A pruning machine, comprising: The main shell forms a receiving space; A first blade and a second blade, each having multiple cutting edges, are mounted on a support rod extending forward from the front end of the main housing. A motor is disposed within the receiving space and configured to drive the first blade and the second blade to move relative to each other via a transmission device to perform cutting; The power supply device is configured to supply power to at least the motor; The pruning machine further includes at least two vibration damping elements. Some of the vibration damping elements have a first vibration damping position, and the remaining vibration damping elements have a second vibration damping position. The ratio of the lateral distance between the first vibration damping position and the second vibration damping position in the front-to-back direction to the longitudinal distance in the up-down direction is greater than or equal to 3.5 and less than or equal to 14.

2. The pruner of claim 1, wherein, One or more vibration damping elements located in front of the center of gravity of the pruning machine have a first vibration damping position, and one or more vibration damping elements located behind the center of gravity of the machine have a second vibration damping position.

3. The pruner of claim 1, wherein, The ratio of the lateral distance to the longitudinal distance is greater than or equal to 8 and less than or equal to 12.

4. The pruner of claim 1, wherein, The first vibration damping position and the second vibration damping position are not on the same horizontal line.

5. The pruner of claim 3, wherein, The lateral distance is greater than or equal to 50 mm and less than or equal to 180 mm; and / or the longitudinal distance is greater than or equal to 5 mm and less than or equal to 100 mm.

6. The pruner of claim 1, wherein, The angle between the line connecting the first damping position and the second damping position and the extension direction of the motor shaft is greater than or equal to 25° and less than or equal to 87°.

7. The pruner of claim 1, wherein, The angle between the line connecting the first damping position and the second damping position and the blade extension direction is greater than or equal to 3° and less than or equal to 65°.

8. The pruner of claim 1, wherein, The first damping position of at least two damping elements located in front of the center of gravity of the pruning machine is the centroid of the damping element; and / or, the second damping position of at least two damping elements located behind the center of gravity of the pruning machine is the centroid of the damping element.

9. The pruner of claim 1, wherein, The output shaft speed of the pruning machine is greater than or equal to 800 rpm and less than or equal to 3000 rpm.

10. The pruner of claim 1, wherein, The pruning machine has a total weight of 3 kg or more and 6 kg or less.

11. The pruner of claim 1, wherein, The first weight of the pruning machine is greater than or equal to 1.2 kg and less than or equal to 3 kg, and the first weight includes the weight of the first blade, the second blade, the motor, and the transmission device.

12. The pruner of claim 11, wherein, The ratio of the distance from the first vibration damping position to the first center of gravity to the center of gravity of the whole machine in the front-rear direction is greater than or equal to 0.1 and less than or equal to 4.5, and the first center of gravity is the center of gravity corresponding to the first weight; And / or, the ratio of the distance from the second damping position to the first center of gravity to the center of gravity of the whole machine in the front-rear direction is greater than or equal to 2 and less than or equal to 10.

13. The pruner of claim 1, wherein, The vibration damping element includes an elastic element, which includes rubber material and / or foam material.

14. The pruner of claim 13, wherein, At least one of the vibration damping elements is disposed between the transmission device and the main housing.

15. The pruner of claim 13, wherein, The pruning machine also has a front handle located on the front side of the main housing, and at least one of the vibration damping elements is disposed near the junction of the front handle and the main housing.

16. A pruning machine, comprising: The main shell forms a receiving space; A first blade and a second blade, each having multiple cutting edges, are mounted on a support rod extending forward from the front end of the main housing. A motor is disposed within the receiving space and configured to drive the first blade and the second blade to move relative to each other via a transmission device to perform cutting; The power supply device is configured to supply power to at least the motor; The pruning machine also includes at least two vibration damping elements, wherein the ratio of the maximum lateral distance between the at least two vibration damping elements in the front-to-back direction to the maximum longitudinal distance in the up-down direction is greater than or equal to 3.5 and less than or equal to 14.

17. The pruner of claim 16, wherein, The transmission device drives the first blade and the second blade to move relative to each other via either a direct drive through an eccentric wheel or a crank rocker arm.

18. The pruner of claim 16, further comprising: The second type of vibration damper is installed between the gearbox or motor housing and the main housing; The second type of vibration damper includes a flat pad whose plane is perpendicular to the vertical direction.

19. The pruning machine according to claim 1, wherein, One or more vibration damping elements located on the front side of the center of gravity of the pruning machine have a first vibration damping position, the first vibration damping position being the centroid of one or more vibration damping elements on the front side of the center of gravity of the machine; one or more vibration damping elements located on the rear side of the center of gravity of the pruning machine have a second vibration damping position, the second vibration damping position being the centroid of one or more vibration damping elements on the front side of the center of gravity of the machine.

20. A long-pruning pruning machine, comprising: Connecting rod; The main housing is disposed at one end of the connecting rod and forms a receiving space; A first blade and a second blade, each having multiple cutting edges, are mounted on a support rod extending forward from the front end of the main housing. A motor is disposed within the receiving space and configured to drive the first blade and the second blade to move relative to each other via a transmission device to perform cutting; The power supply device is configured to supply power to at least the motor; The long-pole pruning machine further includes at least two vibration damping elements. Some of the vibration damping elements have a first vibration damping position, and the remaining vibration damping elements have a second vibration damping position. The ratio of the lateral distance between the first vibration damping position and the second vibration damping position in the front-to-back direction to the longitudinal distance in the up-down direction is greater than or equal to 3.5 and less than or equal to 14.

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