Hedge trimmer

Abstract

A hedge trimmer (100), comprising: a main housing (3) having an accommodating portion (305), the main housing further comprising a front handle (311) and a rear handle (312) for a user to grip; a blade assembly (11) extending in a length extension direction L, the blade assembly comprising a first blade (111) and a second blade (112) which perform a cutting function; an electric motor (20) arranged in the accommodating portion, the electric motor driving the first blade and the second blade; and a transmission module (22) transmitting the power of the electric motor to the first blade and the second blade. When the hedge trimmer operates normally in a no-load state, the sum of the maximum reciprocating speeds of the first blade and the second blade is greater than 4400 spm and less than or equal to 6000 spm, the vibration acceleration of the front handle is not greater than 4 m / s2, and / or the vibration acceleration of the rear handle is not greater than 2.5 m / s2. The hedge trimmer can achieve both cutting efficiency and low vibration, thereby improving the user experience.

Description

Pruning machine Technical Field

[0001] This application relates to the field of power tool technology, and in particular to pruning machines. Background Technology

[0002] A pruning machine is a power tool used for garden pruning. In related technologies, pruning machines exhibit significant vibration during operation, which is transmitted to the grip area, impacting the user experience. Summary of the Invention

[0003] In view of this, embodiments of this application provide a pruning machine that achieves high cutting efficiency while minimizing vibration.

[0004] On one hand, a pruning machine is provided, which extends along three orthogonal spatial directions: a length extension direction L, a width extension direction W, and a height extension direction H. The pruning machine includes: a main body housing with a receiving portion, the main body housing further including a front handle and a rear handle for a user to grip; a blade assembly extending along the length extension direction L, the blade assembly including a first blade and a second blade for performing a cutting function; a motor disposed within the receiving portion, the motor driving the first blade and the second blade; and a transmission module transmitting the power of the motor to the first blade and the second blade. When the pruning machine is operating normally under no-load conditions, the sum of the maximum reciprocating speeds of the first blade and the second blade is greater than 4400 sppm and less than or equal to 6000 sppm, and the vibration acceleration of the front handle is not greater than 4 m / s². 2 And / or the vibration acceleration of the rear handle is not greater than 2.5 m / s². 2 .

[0005] On one hand, a pruning machine is provided, which extends along three orthogonal spatial directions: a length extension direction L, a width extension direction W, and a height extension direction H; the pruning machine includes: a main body housing having a receiving portion, the main body housing also including a front handle and a rear handle for a user to hold; and a blade assembly extending along the length extension direction L, the blade assembly including a first blade and a second blade for performing a cutting function;

[0006] A motor is disposed within the receiving portion, and the motor drives the first blade and / or the second blade to reciprocate along the length extension direction L; a transmission module transmits the power of the motor to the first blade and / or the second blade;

[0007] When the pruning machine is operating normally under no-load conditions, the sum of the maximum reciprocating speeds of the first and second blades is greater than 4400 sppm and less than or equal to 6000 sppm, and the vibration acceleration of the front handle is not greater than 4 m / s². 2And / or the vibration acceleration of the rear handle is not greater than 2.5 m / s². 2 .

[0008] Both the first blade and the second blade include a body portion extending along the length extension direction L, and a plurality of cutting teeth for cutting vegetation. The cutting teeth have a front cutting edge and a rear cutting edge formed at the front and rear of the front cutting edge along the length extension direction L, respectively. On the first blade, a maximum distance is formed between the front cutting edges of two adjacent cutting teeth in the length extension direction L. The maximum distance is defined as the tooth pitch P1.

[0009] In some embodiments, in the length extension direction L, the effective cutting length L0 of both the first blade and the second blade is configured to be not less than 500 mm and not more than 1000 mm, the thickness T of both the first blade and the second blade is configured to be greater than 1.5 mm and less than or equal to 3 mm, and the ratio of the tooth pitch P1 to the sum of the weights of the first blade and the second blade is not less than 0.024 mm / kg and not more than 0.084 mm / kg; or

[0010] The blade assembly is configured such that the ratio of the effective cutting length L0 of the first blade and the second blade to the weight of the bare machine of the pruning machine is greater than 110 mm / kg and less than 385 mm / kg. The thickness of the first blade and the second blade is both greater than 1.5 mm and less than or equal to 3 mm, and the total number of teeth of the first blade and the second blade is in the range of 52 to 166.

[0011] In some embodiments, both the first blade and the second blade include a body portion extending along the length extension direction L, and a plurality of cutting teeth for cutting vegetation. The cutting teeth have a front cutting edge and a rear cutting edge formed at the front and rear ends along the length extension direction L, respectively. On the first blade, a maximum spacing is formed between the front cutting edges of two adjacent cutting teeth in the length extension direction L, and the maximum spacing is defined as the tooth pitch P1. The first blade has an effective cutting length L0 in the length extension direction L.

[0012] In the length extension direction L, the effective cutting length L0 of both the first blade and the second blade is configured to be not less than 500 mm and not more than 800 mm; the thickness T of both the first blade and the second blade is configured to be greater than 1.5 mm and less than or equal to 3 mm; the ratio of the tooth pitch P1 to the weight of the blade assembly is not less than 0.036 mm / kg and not more than 0.08 mm / kg; or

[0013] The blade assembly is configured such that the ratio of the effective cutting length L0 of the first blade and the second blade to the weight of the bare machine of the pruning machine is greater than 130 mm / kg and less than 270 mm / kg, and the thickness of the first blade and the second blade is both greater than 1.5 mm and less than or equal to 3 mm, and the total number of teeth of the first blade and the second blade is in the range of 52 to 130.

[0014] In some embodiments, the pruning machine further includes an elastic damping member supporting the transmission module suspended in the main housing; one end of the elastic damping member is connected to the transmission housing, and the other end of the elastic damping member is connected to the main housing; the elastic damping member includes a first elastic damping member and a second elastic damping member, wherein the first elastic damping member and the second elastic damping member are respectively disposed on both sides of the transmission module in the width extension direction W, so as to suppress the outward transmission of vibration generated by the transmission mechanism; and / or the pruning machine further includes at least one elastic support member, wherein in the width extension direction W, the elastic support member is disposed between the main housing and the transmission housing; in the length extension direction L, the elastic damping member is closer to the front handle relative to the elastic support member, and the elastic support member is closer to the rear handle relative to the elastic damping member, and the elastic support member at least suppresses the transmission of vibration generated by the transmission mechanism to the main housing.

[0015] In some embodiments, the elastic damper and the elastic support are configured as different types of elastic elements, the elastic damper being configured as a spring capable of compression or extension, and the elastic support being configured as an elastic rubber element.

[0016] In some embodiments, the transmission module is suspended and supported on the main housing, and the pruning machine further includes a first support structure, which is at least used to limit the movement of the transmission housing in the height extension direction H.

[0017] In some embodiments, the first support structure includes a limiting mounting hole provided on one of the main housing and the transmission housing, and a support beam provided on the other of the main housing and the transmission housing, the support beam passing through the limiting mounting hole, the limiting mounting hole at least limiting the movement of the support beam in the height extension direction H.

[0018] In some embodiments, the distance between the support beam and the limiting mounting hole in any direction does not exceed 6 mm.

[0019] In some embodiments, the first blade and the second blade have contact planes that contact each other, the first support structure has a first central axis X1, and the elastic damper has a second central axis X2;

[0020] In the length extension direction L, the distance between the projections of the first central axis X1 and the second central axis X2 onto the contact plane does not exceed 100 mm.

[0021] In some embodiments, the transmission housing includes a leading edge near the blade assembly and a trailing edge away from the blade assembly; the pruning machine further includes a second support structure for supporting and limiting the movement of the transmission housing in the width extension direction W, wherein one of the first support structure and the second support structure is disposed near the leading edge of the transmission housing and the other is disposed near the trailing edge of the transmission housing.

[0022] In some embodiments, the pruning machine further includes an elastic damping member that supports the transmission module suspended on the main housing, one end of the elastic damping member being connected to the transmission housing and the other end of the elastic damping member being connected to the main housing; the pruning machine further includes a first support structure for at least limiting the movement of the transmission housing in the height extension direction H.

[0023] In some embodiments, in the width extension direction W, the main housing and the transmission housing have an opening facing downwards along the height extension direction H and in fluid communication with the outside, at least a portion of the opening being configured to be visible when viewed from bottom to top in the height extension direction H; and / or

[0024] When the pruning machine is viewed from directly below the motor, a first damping distance W1 and a second damping distance W2 are formed between the main housing and the transmission housing in the width extension direction W. The range of both the first damping distance W1 and the second damping distance W2 is configured to be less than or equal to 10 mm.

[0025] In some embodiments, in the width extension direction W, the outward extension length of the cutting teeth is greater than or equal to 18 mm and less than or equal to 24 mm.

[0026] In some embodiments, the pruning machine further includes an elastic damping member that supports the transmission module suspended on the main housing, one end of the elastic damping member being connected to the transmission housing and the other end of the elastic damping member being connected to the main housing; the pruning machine further includes a first support structure, at least for limiting the movement of the transmission housing in the height extension direction H.

[0027] In some embodiments, the elastic damping element includes a first elastic damping element and a second elastic damping element, wherein the first elastic damping element and the second elastic damping element are respectively disposed on both sides of the transmission module in the width extension direction W.

[0028] In some embodiments, the pruning machine further includes at least one elastic support member, which is disposed between the main housing and the transmission housing in the width extension direction W;

[0029] In the length extension direction L, the elastic damper is closer to the front handle than the elastic support, and the elastic support is closer to the rear handle than the elastic damper. The elastic support at least suppresses the transmission of vibrations generated by the transmission mechanism to the main housing.

[0030] In some embodiments, the first support structure includes a limiting mounting hole provided on one of the main housing and the transmission housing along the width extension direction W, and a support beam provided on the other of the main housing and the transmission housing, the support beam passing through the limiting mounting hole, the limiting mounting hole at least limiting the movement of the support beam in the height extension direction H.

[0031] In some embodiments, the support beam is spaced apart by a first gap in the height direction H with respect to the limiting mounting hole, and the support beam is spaced apart by a second gap in the width direction W with respect to the limiting mounting hole, wherein the first gap and the second gap are configured to be less than 6 mm.

[0032] In some embodiments, the transmission housing includes a leading edge near the blade assembly and a trailing edge away from the blade assembly; the pruning machine further includes a second support structure for supporting and limiting the movement of the transmission housing in the width extension direction W, wherein one of the first support structure and the second support structure is disposed near the leading edge of the transmission housing and the other is disposed near the trailing edge of the transmission housing.

[0033] In some embodiments, the second support mechanism includes the at least one elastic support member and a mounting groove that mates with the elastic support member, the mounting groove being disposed on the main housing.

[0034] On the other hand, a pruning machine is provided, which extends along three orthogonal spatial directions: a length extension direction L, a width extension direction W, and a height extension direction H. The pruning machine includes: a main housing with a receiving portion; a blade assembly extending along the length extension direction L, the blade assembly including a first blade and a second blade for performing a cutting function; a motor disposed within the receiving portion, the motor driving the first blade and the second blade to reciprocate along the length extension direction L; and a transmission module transmitting the power of the motor to the first blade and the second blade, the transmission module including a transmission mechanism and a transmission housing housing at least a portion of the transmission mechanism, the transmission mechanism including: a reduction structure; a first drive unit poweredly connected to the reduction structure and cooperating with the first blade to transmit the power output by the reduction structure to the first blade; and a second drive unit poweredly connected to the reduction structure and cooperating with the second blade to transmit the power output by the reduction structure to the second blade; wherein the transmission module is suspended and supported on the main housing.

[0035] In some embodiments, in the width extension direction W, there is an opening between the main housing and the transmission housing that faces downward along the height extension direction H and is in fluid communication with the outside, at least a portion of the opening being configured to be visible when viewed from below in the height extension direction H, and / or

[0036] Along the width extension direction W, a first damping distance W1 and a second damping distance W2 are formed between the main housing and the transmission housing, and the range of both the first damping distance W1 and the second damping distance W2 is configured to be less than or equal to 10 mm.

[0037] In some embodiments, the pruning machine further includes an elastic damping component that supports the transmission module suspended in the main housing, one end of the elastic damping component being connected to the transmission housing and the other end of the elastic damping component being connected to the main housing;

[0038] The pruning machine also includes a first support structure, which is at least used to limit the movement of the transmission housing in the height extension direction H.

[0039] In some embodiments, the elastic damping element includes a first elastic damping element and a second elastic damping element, wherein the first elastic damping element and the second elastic damping element are respectively disposed on the left and right sides of the transmission module in the width extension direction W.

[0040] In some embodiments, the first support structure includes a limiting mounting hole provided on one of the main housing and the transmission housing, and a support beam provided on the other of the main housing and the transmission housing, the support beam passing through the limiting mounting hole, the limiting mounting hole at least limiting the movement of the support beam in the height extension direction H.

[0041] In some embodiments, the outer wall of the support beam and the inner wall of the limiting mounting hole are spaced apart by a first gap in the height direction H, and the outer wall of the support beam and the inner wall of the limiting mounting hole are spaced apart by a second gap in the length extension direction L, wherein both the first gap and the second gap are configured to be less than 6 mm.

[0042] In some embodiments, the first blade and the second blade have contact planes that contact each other, the first support structure has a first central axis X1, and the elastic damper has a second central axis X2;

[0043] In the length extension direction L, the distance between the projections of the first central axis X1 and the second central axis X2 onto the contact plane does not exceed 100 mm.

[0044] In some embodiments, the pruning machine further includes at least one elastic support member disposed between the main housing and the transmission housing. In the length extension direction L, the elastic damper is closer to the front handle relative to the elastic support member, and the elastic support is closer to the rear handle relative to the elastic damper. The elastic support member at least suppresses the transmission of vibrations generated by the transmission mechanism to the main housing; and / or

[0045] The transmission housing includes a front edge near the blade assembly and a rear edge away from the blade assembly. The pruning machine also includes at least a second support structure for supporting and limiting the movement of the transmission housing in the width extension direction W. One of the first support structure and the second support structure is disposed near the front edge of the transmission housing, and the other is disposed near the rear edge of the transmission housing.

[0046] In some embodiments, the elastic damper and the elastic support are configured as different types of elastic elements; and / or

[0047] The elastic damping element is configured as a spring capable of compression or extension, and the at least one elastic support element is configured as an elastic rubber element.

[0048] In some embodiments, when the pruning machine is viewed directly below the motor, at least a portion of the bottom area of ​​the transmission housing is exposed outside the main housing.

[0049] On the other hand, a pruning machine is provided, which extends along three orthogonal spatial directions: a length extension direction L, a width extension direction W, and a height extension direction H. The pruning machine includes: a working head module configured to perform pruning tasks; a drive mechanism configured to drive the working head module, the drive mechanism including a motor and a transmission mechanism for transmitting power from the motor to the working head module; a main housing with a gripping portion; a transmission housing housing housing at least a portion of the transmission mechanism, the motor being mounted to the transmission housing, and a gap between the main housing and the transmission housing; and an elastic damping member disposed between the main housing and the transmission housing, the elastic damping member being configured to at least suppress the transmission of vibrations generated by the transmission housing to the main housing. The pruning machine also includes a first support structure disposed near the elastic damping member, the first support structure being at least used to limit the movement of the transmission housing in the height extension direction H.

[0050] In some embodiments, the drive mechanism includes a motor and a transmission module that transmits the power of the motor to the working head module, and the elastic damping element includes a first elastic damping element and a second elastic damping element, which are respectively disposed on the left and right sides of the transmission module in the width extension direction W.

[0051] In some embodiments, the working head module is configured as a blade assembly, the blade assembly including a first blade and a second blade that perform a cutting function, the first blade and the second blade having contact planes that contact each other, the first support structure having a first central axis X1, and the elastic damper having a second central axis X2;

[0052] In the length extension direction L, the distance between the projections of the first central axis X1 and the second central axis X2 onto the contact plane does not exceed 100 mm.

[0053] In some embodiments, the first support structure includes a limiting mounting hole provided on one of the first housing and the second housing, and a support beam provided on the other of the first housing and the second housing, the support beam passing through the limiting mounting hole, the limiting mounting hole at least limiting the movement of the support beam in the height extension direction H.

[0054] In some embodiments, the distance between the outer wall of the support beam and the inner wall of the limiting mounting hole is not less than 2 mm and not more than 6 mm.

[0055] In some embodiments, the grip portion includes a front handle and a rear handle for a user to grip, and the pruning machine further includes at least one elastic support member disposed in the gap between the first housing and the second housing; in the width extension direction W, the elastic support member is disposed between the first housing and the second housing;

[0056] In the length extension direction L, the elastic damper is closer to the front handle than the elastic support, and the elastic support is closer to the rear handle than the elastic damper. The elastic support is configured to at least suppress the transmission of vibrations generated by the transmission mechanism to the first housing.

[0057] In some embodiments, the elastic damper and the elastic support are configured as different types of elastic elements, the elastic damper being configured as a spring capable of compression or extension, and the elastic support being configured as an elastic rubber element.

[0058] In some embodiments, the pruning machine further includes a second support structure disposed between the first housing and the second housing, and at least limits the movement of the second housing relative to the first housing in the height extension direction H;

[0059] In the length extension direction L, the second housing includes a front edge near the working head module and a rear edge away from the working head module, wherein one of the first support structure and the second support structure is disposed near the front edge of the second housing and the other is disposed near the rear edge of the second housing.

[0060] On the other hand, a pruning machine is provided, which extends along three orthogonal spatial directions: a length extension direction L, a width extension direction W, and a height extension direction H; the pruning machine includes: a working head module configured to perform pruning tasks; a drive mechanism configured to drive the working head module; a main housing with a gripping part; and a transmission housing configured to mount the drive mechanism, wherein there is a gap between the first housing and the second housing;

[0061] The first support structure includes a limiting mounting hole provided on one of the main housing and the transmission housing, and a support beam provided on the other of the main housing and the transmission housing. The support beam passes through the limiting mounting hole with a gap, and the limiting mounting hole at least limits the movement of the support beam in the height extension direction H.

[0062] In some embodiments, the pruning machine further includes a vibration isolation sleeve fitted between the support beam and the limiting mounting hole; the vibration isolation sleeve is at least partially made of an elastic or flexible material; and / or

[0063] The vibration isolation sleeve is configured such that the distance by which the support beam can move relative to the limiting mounting hole in the length extension direction L is greater than the distance by which the support beam can move relative to the limiting mounting hole in the height extension direction H.

[0064] In some embodiments, at least two elastic support members are provided between the main housing and the transmission housing, and the at least two elastic support members are provided on opposite sides of the transmission housing in the width extension direction W. Attached Figure Description

[0065] Figure 1 is a three-dimensional structural schematic diagram of a pruning machine according to some embodiments of this application.

[0066] Figure 2 is a three-dimensional structural schematic diagram of a pruning machine according to some embodiments of this application from another perspective.

[0067] Figure 3 is a partially exploded structural diagram of a pruning machine according to some embodiments of this application.

[0068] Figure 4 is a partially exploded structural diagram of a pruning machine according to some embodiments of this application from another perspective.

[0069] Figure 5 is a fully exploded structural diagram of a pruning machine according to some embodiments of this application.

[0070] Figure 6 is a partial cross-sectional view of a pruning machine according to some embodiments of this application.

[0071] Figure 7 is a bottom view of a pruning machine according to some embodiments of this application.

[0072] Figure 8 is a cross-sectional view of section AA in Figure 7.

[0073] Figure 9 is an enlarged structural diagram of point B in Figure 8.

[0074] Figure 10 is a cross-sectional view of section CC in Figure 7.

[0075] Figure 11 is a front view of the pruning machine section structure of some embodiments of this application.

[0076] Figure 12 is a three-dimensional structural schematic diagram of the vibration isolation sleeve according to some embodiments of this application.

[0077] Figure 13 is a three-dimensional structural schematic diagram of the vibration isolation sleeve from another perspective of some embodiments of this application.

[0078] Figure 14 is an enlarged structural diagram of point E in Figure 8.

[0079] Figure 15 is a cross-sectional view of section DD in Figure 7.

[0080] Figure 16 is a partially enlarged cross-sectional view of a pruning machine according to some embodiments of this application.

[0081] Figure 17 is an exploded view of the structure of a pruning machine according to some embodiments of this application.

[0082] Figure 18 shows a partial structure of a pruning machine according to some embodiments of this application, including a side view after partially opening the main casing and a cross-sectional view of the first support structure.

[0083] Figure 19 is a bottom view of a pruning machine component structure according to some embodiments of this application. Detailed Implementation

[0084] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0085] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0087] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0088] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0089] It should be noted that an element is referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. An element is considered to be "connected" to another element, which may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0090] A pruning machine is a power tool used for garden pruning, capable of trimming various shrubs, hedges, and other outdoor plants. The transmission module and blade assembly of a pruning machine generate vibration during operation. The higher the speed of the blade assembly, the better the cutting efficiency, but the greater the vibration of the transmission module and blade assembly. This vibration is transmitted to the front and rear handles, causing significant vibration felt by the operator when holding the handles. This increases operator fatigue during prolonged use, making it unsuitable for extended handheld pruning and negatively impacting the user experience.

[0091] Figure 1 is a three-dimensional structural schematic diagram of a pruning machine according to some embodiments of the present application; Figure 2 is a three-dimensional structural schematic diagram of a pruning machine according to some embodiments of the present application from another perspective; Figure 3 is a partially exploded structural schematic diagram of a pruning machine according to some embodiments of the present application; Figure 4 is a partially exploded structural schematic diagram of a pruning machine according to some embodiments of the present application from another perspective; Figure 5 is a fully exploded structural schematic diagram of a pruning machine according to some embodiments of the present application; Figure 6 is a partial sectional view of a pruning machine according to some embodiments of the present application; Figure 7 is a bottom view of a pruning machine according to some embodiments of the present application; Figure 8 is a sectional view of section AA in Figure 7; Figure 9 is an enlarged structural schematic diagram of point B in Figure 8; and Figure 10 is a sectional view of section CC in Figure 7.

[0092] As shown in Figures 1 to 10, the pruning machine 100 in the embodiments disclosed in this application extends along three orthogonal spatial directions: the length extension direction L, the width extension direction W, and the height extension direction H. The pruning machine 100 includes a working head module, a drive mechanism 2, a main housing 3 (first housing), and a battery pack that powers the pruning machine 100.

[0093] The main housing 2 includes a grip 31 for the user to hold the machine. When using the pruning machine 100, the user holds the grip 31 to operate the pruning machine 100 for pruning operations. At this time, the length extension direction L of the pruning machine 100 is the front-to-back direction, and along the length extension direction L, the working head module is located on the front side of the pruning machine 100; the width extension direction W of the pruning machine 100 is the left-to-right direction; and the height extension direction H of the pruning machine 100 is the up-to-down direction.

[0094] As shown in Figure 1, the grip 31 may include a front handle 311 and a rear handle 312, which makes it convenient for the user to hold the pruning machine 100 with both hands to perform the operation.

[0095] The working head module can be driven by the drive mechanism 2 to perform trimming operations. For example, the working head module can be a blade assembly 11. In some embodiments, as shown in Figures 2 and 5, the blade assembly 11 includes a pair of stacked first blades 111 and second blades 112, and the drive mechanism 2 drives the first blades 111 and / or the second blades 112 to reciprocate along the length extension direction L to perform trimming operations. The specific structure of the drive mechanism 2 is not limited here, as long as the drive mechanism 2 can drive the working head module to perform cutting movements to perform trimming operations.

[0096] For operators, maximizing the cutting speed of the blade assembly 11 of the pruning machine 100 is highly desirable, allowing for the completion of pruning work on a corresponding garden area in a shorter time. However, high cutting speeds inevitably lead to greater vibrations, which are transmitted to the operator's hand and arm through the grip 31. Prolonged use may cause operator fatigue, hand numbness, and other discomforts. These noticeable discomforts also drastically increase the safety risks of operating the machine. Therefore, the greater the vibration intensity of the pruning machine 100, the shorter the operator's tolerance time, and both work efficiency and safety will significantly decrease. The problem with existing handheld pruning machines on the market is that they cannot simultaneously achieve both high cutting speeds and low vibrations in the pruning machine 100.

[0097] Further research by the inventors revealed that if the reciprocating speed of the blade assembly 11 of the pruning machine 100 is too fast, the user needs to swing the pruning machine more forcefully or frequently adjust their posture, which increases the difficulty of operation and fatigue. Therefore, an excessively fast reciprocating speed of the blade assembly 11 cannot be effectively converted into actual pruning efficiency, and may even increase the operator's labor intensity and machine wear. Moreover, excessively high cutting speeds may cause branches to be pushed over or missed.

[0098] This application discloses a pruning machine 100, which, when operating normally under no-load conditions, has a maximum reciprocating speed of more than 4400 strokes per minute and less than or equal to 6000 strokes per minute, and a vibration acceleration of the front handle 311 of no more than 4 m / s². 2 The vibration acceleration of the rear handle 312 is not greater than 2.5 m / s². 2 (meters per second squared). For example, the combined maximum reciprocating speed of the first blade 111 and the second blade 112 can be 4600 spm, 4800 spm, 5000 spm, 5200 spm, 5400 spm, 5600 spm, 5800 spm, etc. The vibration acceleration of the front handle 311 can be 3.6 m / s². 2 3.4 m / s 2 3.2m / s 2 3.0m / s 2 2.8m / s 2 2.5m / s 2 2.0m / s 2 1.8m / s 2 1.5m / s 2 In one embodiment, when the pruning machine 100 is operating normally under no-load conditions, the sum of the maximum reciprocating speeds of the first blade 111 and the second blade 112 is greater than 4400 spm and less than or equal to 5500 spm, and the vibration acceleration of the front handle 311 is not greater than 3.2 m / s². 2 The vibration acceleration of the rear handle 312 is not greater than 2.5 m / s². 2 Preferably, the vibration acceleration of the front handle 311 can be configured to be no greater than 2.5 m / s². 2 In the specific embodiments disclosed in this application, the sum of the maximum reciprocating speeds of the first blade 111 and the second blade 112 can be understood as the sum of the maximum reciprocating speeds of the first blade 111 and the second blade 112 when the pruning machine 100 is operating normally under no-load conditions. That is, the sum of the number of reciprocating movements per minute (SPM) of the first blade 111 and the second blade 112 is greater than 4400 times and less than or equal to 6000 times. The reciprocating speeds of the first blade 111 and the second blade 112 of the pruning machine 100 provided in this application are controlled within a reasonable range, which improves pruning efficiency while reducing vibration.

[0099] The vibration acceleration of the front handle 311 and the rear handle 312 can generally be measured using piezoelectric sensors, with the handheld pruning machine 100 in an unloaded state and the drive mechanism 2 continuously running. The test point is generally selected at the web of the user's hand. Furthermore, the vibration acceleration value of each pruning machine is of great interest to users, and competitive pruning machines typically advertise their vibration acceleration values.

[0100] In other embodiments, the first blade 111 of the pruning machine 100 can be configured as a moving blade, and the second blade 112 can be configured as a stationary blade. When the moving blade starts to move, it slides along the stationary blade. The branch is placed between the moving and stationary blades, and as the moving blade moves, it forms a shearing force with the stationary blade, cutting the branch. The moving blade continuously reciprocates, repeating the cutting process. In this embodiment, the sum of the maximum reciprocating speeds of the first blade 111 and the second blade 112 can be understood as the maximum reciprocating speed of the moving blade. That is, when the pruning machine is operating normally under no-load conditions, the maximum reciprocating speed of the moving blade is less than or equal to 6000 strokes per minute (spm), and the vibration acceleration of the front handle 311 is not greater than 4 m / s². 2 The vibration acceleration of the rear handle 312 is not greater than 2.5 m / s². 2 (meters per square second). Preferably, when the pruning machine is operating normally under no-load conditions, the maximum reciprocating speed of the moving blade is greater than 4400 sppm and less than or equal to 5500 sppm, and the vibration acceleration of the front handle 311 is not greater than 3.2 m / s². 2 The vibration acceleration of the rear handle 312 is not greater than 2.5 m / s². 2 Preferably, the vibration acceleration of the front handle 311 can be configured to be no greater than 2.5 m / s². 2 .

[0101] In some embodiments, as shown in Figures 2 and 5, both the first blade 111 and the second blade 112 include a body portion 113 extending along the length extension direction L and a serrated portion 114 disposed on the body portion, the serrated portion 114 being used for cutting vegetation. There can be multiple serrated portions 114, each disposed on opposite sides of the body portion 113 along the width extension direction W. The serrated portions 114 and the body portion 113 can be integrally formed. The first blade 111 and the second blade 112 are respectively connected to the drive mechanism 2, and the first blade 111 and the second blade 112 can reciprocate under the drive of the drive mechanism 2 to perform cutting operations. Of course, in some embodiments, multiple serrated portions (not shown) can also be configured to be disposed on one side of the body portion 113 along the width extension direction W. In this case, the pruning machine is configured as a single-sided pruning machine.

[0102] Further, as shown in FIG7, each cutting tooth portion 114 has a front cutting edge 1141 and a rear cutting edge 1142 formed at the front and rear along the length extension direction L, respectively. On the same blade, for example, on the first blade 111, a maximum distance is formed between the front cutting edges 1141 of two adjacent cutting tooth portions 114 in the length extension direction L, and this maximum distance is defined as the tooth pitch P1. The front cutting edge 1141 has a root portion 1143 connected to the body portion 113 and a top portion 1144 opposite to the root portion 1143 along the width extension direction W. In this embodiment, the tooth pitch P1 can be understood as the distance between the top portion 1144 of the front cutting edge 1141 of one cutting tooth portion 114 and the top portion 1144 of the front cutting edge 1141 of another adjacent cutting tooth portion 112 on the same blade, for example, in the length extension direction L of the first blade 111.

[0103] In some embodiments, as shown in Figures 4, 5, and 17, the drive mechanism 2 includes a drive module 21 and a transmission module 22 that transmits power from the drive module 21 to the blade assembly 11. The drive module 21 is configured as a motor 20. As shown in Figure 1, the main housing 3 includes a receiving portion 305 for accommodating the motor 20. A front handle 311 is located on the front side of the receiving portion 305, and a rear handle 312 is located on the rear side of the receiving portion 305.

[0104] Referring to Figures 4, 5, and 17, the transmission module 22 includes a transmission mechanism 221 and a transmission housing 4 (second housing) that at least partially houses the transmission mechanism 221. The transmission housing 4 surrounds the transmission mechanism 221. In this embodiment, the transmission mechanism 221 can be understood as a mechanism for transmitting power between the motor 20 and the blade assembly 11. The transmission mechanism 221 includes a reduction gear structure 222 connected to the motor 20, a first drive unit 223, and a second drive unit 224. The first drive unit 223 is powered by the reduction gear structure 222 and cooperates with the first blade 111 to transmit the power output from the reduction gear structure 222 to the first blade 111. The second drive unit 224 is powered by the reduction gear structure 222 and cooperates with the second blade 112 to transmit the power output from the reduction gear structure 222 to the second blade 112. In some embodiments, the first drive unit 223 includes a first drive unit 224.

[0105] A first eccentric wheel and a first connecting rod 2232 cooperating with the first eccentric wheel to introduce power to the first blade 111. A second drive unit 224 includes a second eccentric wheel and a second connecting rod 2242 cooperating with the second eccentric wheel 2241 to introduce power to the second blade 112. Of course, in other embodiments, the first drive unit 223 and the second drive unit 224 may also be designed as a crank-connecting rod.

[0106] In some embodiments, as shown in Figures 4 and 5, the motor 20 is mounted and connected to the transmission housing 4 on the outside, and the transmission mechanism 221 is mounted inside the transmission housing 4.

[0107] The vibration of the pruning machine 100 is mainly generated by the movement of the blade assembly 11 and the transmission mechanism 221, and the vibration generated by the transmission mechanism 221 and the blade assembly 11 is transmitted to the transmission housing 4. The higher the movement speed of the transmission mechanism 221, the higher the reciprocating speed of the blade assembly 11, and the greater the vibration generated.

[0108] The vibrations generated by the pruning machine 100 generally exhibit the largest amplitude along the width extension direction W, followed by the amplitude along the length extension direction L, and the smallest amplitude along the height extension direction H. For example, the motor's speed range can be from 22,000 rpm to 35,000 rpm, and the maximum amplitude of the pruning machine 100 is 5 mm. Preferably, the motor's speed range can be from 26,000 to 32,000 rpm.

[0109] The inventors discovered that when the pruning machine 100 is in operation, the first blade 111 and / or the second blade 112 need to frequently reciprocate. If the first blade 111 and the second blade 112 are heavy, then during the movement, due to inertia, a greater force is required to change their motion state (e.g., acceleration, deceleration, or change of direction), and this inertial force will lead to greater vibration. However, if the first blade 111 and the second blade 112 are too light, on the one hand, the pruning machine 100 may have insufficient shearing force during cutting, thus reducing cutting efficiency; on the other hand, the lightweight first blade 111 and the second blade 112 are also more prone to breakage when cutting harder branches due to insufficient strength. Furthermore, the inventors also discovered that a heavier transmission module 22 can suppress vibration to a certain extent. However, a heavier transmission module 22 will also affect the lifespan of the pruning machine and the human-machine experience.

[0110] In some embodiments, the combined weight of the first blade 111 and the second blade 112 is greater than or equal to 500 grams and less than or equal to 800 grams, and / or the weight of the transmission module 22 is greater than or equal to 500 grams and less than or equal to 1000 grams. Preferably, the combined weight of the first blade 111 and the second blade 112 is greater than or equal to 550 grams and less than or equal to 750 grams. The weight of the transmission module 22 is greater than or equal to 580 grams and less than or equal to 820 grams. The combined weight of the first blade 111 and the second blade 112 can be 600 grams, 650 grams, 680 grams, etc. The weight of the transmission module 22 can be 620 grams, 660 grams, 700 grams, 750 grams, 770 grams, etc. It is understood that the combined weight of the first blade and the second blade here refers to the combined weight of the two blades, excluding other structures connecting the blades.

[0111] In some embodiments, as shown in FIG7, the effective cutting length LO of both the first blade 111 and the second blade 112 is configured to be not less than 500 mm and not more than 1000 mm. The thickness (not shown) of both the first blade 111 and the second blade 112 is configured to be greater than 1.5 mm and less than or equal to 3 mm. The ratio of the tooth pitch P1 to the sum of the weights of the first blade 111 and the second blade 112 is not less than 0.024 mm / kg and not more than 0.084 mm / kg. Further, the ratio of the tooth pitch P1 to the sum of the weights of the first blade 111 and the second blade 112 can be configured to be not less than 0.036 mm / kg and not more than 0.08 mm / kg. Preferably, the ratio of the tooth pitch P1 to the sum of the weights of the first blade 111 and the second blade 112 is not less than 0.04 mm / kg and not more than 0.07 mm / kg. Specifically, the effective cutting length L0 of both the first blade 111 and the second blade 112 can be configured as 550mm, 600mm, 650mm, 700mm, 750mm, or 800mm. The thickness of both the first blade 111 and the second blade 112 can be configured as 1.8mm, 2mm, 2.3mm, or 2.5mm. The ratio of the tooth pitch P1 to the sum of the weights of the first blade 111 and the second blade 112 can be no less than 0.043, 0.045, 0.048, 0.05, 0.056, or 0.063.

[0112] When the effective cutting length LO of the first blade 111 and the second blade 112 is the same, the larger the tooth pitch P1, the fewer the teeth 114, and the lighter the weight of the first blade 111 and the second blade 112; conversely, the smaller the tooth pitch P1, the more the teeth 114, and the heavier the first blade 111 and the second blade 112. Furthermore, an excessively large tooth pitch P1 will affect cutting efficiency, while an excessively small tooth pitch P1 will prevent the cutting of thick branches, and the increased cutting resistance will also reduce cutting efficiency. In this embodiment, the tooth pitch P1 is in the range of 24 to 42 mm. For example, the tooth pitch P1 of the first blade 111 and the second blade 112 can both be 28 mm, 30 mm, 35 mm, and 38 mm.

[0113] In some embodiments, as shown in FIG7, the length L7 of the outward extension of the cutting teeth 114 in the width extension direction W is greater than or equal to 18 mm and less than or equal to 24 mm. For example, 19.5 mm, 23 mm, etc. If the outward extension of the cutting teeth 114 is too long, the weight of the first blade 111 and the second blade 112 will be too heavy, and they will be more prone to breakage when subjected to pressure from hard tree branches. The outward extension length of the cutting teeth 114 refers to the distance from the root 1143 to the top 1144 of the cutting edge of the cutting teeth 114.

[0114] In some embodiments, the longer the effective cutting length L0 of the first blade 111 and the second blade 112, the more cutting teeth 114 can be configured on the first blade 111 and the second blade 112. However, more cutting teeth 114 and longer first blades 111 and second blades 112 will inevitably lead to greater vibration. In the embodiments of this disclosure, the total number of cutting teeth 114 on the first blade 111 and the second blade 112 is in the range of 52 to 166. Preferably, the total number of cutting teeth 114 is in the range of 52 to 130. For example, when the effective cutting length L0 of the first blade 111 and the second blade 112 is configured to be 500 to 600 mm, the total number of cutting teeth 114 can be configured to be in the range of 52 to 92. When the effective cutting length L0 of the first blade 111 and the second blade 112 is configured to be greater than 600 mm and less than or equal to 700 mm, the total number of cutting teeth 114 can be configured to be in the range of 64 to 100. The effective cutting length L0 of the first blade 111 and the second blade 112 is configured to be greater than 700 mm and less than or equal to 800 mm, and the total number of cutting teeth 114 can be configured in the range of 72 to 130.

[0115] Preferably, the blade assembly 11 is configured such that the ratio of the tooth pitch P1 to the sum of the weights of the first blade 111 and the second blade 112 is not less than 0.04 mm / kg and not more than 0.07 mm / kg, and the lengths of both the first blade 111 and the second blade 112 are configured to be not less than 550 mm and not more than 750 mm, the thicknesses of both the first blade and the second blade are configured to be greater than 1.8 mm and less than or equal to 2.5 mm, the tooth pitch P1 is in the range of 28 to 40 mm, and / or the weight of the transmission module 22 is configured to be 550 to 950 grams.

[0116] The effective cutting length L0 of the first blade 111 and the second blade 112 is typically the actual cutting area of ​​the blade. Specifically, in the embodiments disclosed in this application, the effective cutting length L0 of the first blade 111 and the second blade 112 is the maximum axial distance between the front cutting edge 1142 of the foremost cutting tooth portion 114 of the first blade 111 and the front cutting edge 1142 of the last cutting tooth portion 114 of the first blade 111, where the foremost cutting tooth portion 114 of the first blade 111 and the rearmost cutting tooth portion 114 of the first blade 111 are on the same side.

[0117] To minimize vibration, the first blade 111 and the second blade 112 are configured to have essentially the same weight and shape. Therefore, the effective cutting length L0 of the first blade 111 and the second blade 112 are also the same. Further, in some embodiments, as shown in Figures 2 and 7, the ratio of the effective cutting length L0 of the first blade 111 and the second blade 112 to the weight of the bare pruning machine 100 (which can be understood as a pruning machine without a battery pack and sheath) is greater than 110 mm / kg and less than 385 mm / kg. Preferably, the ratio of the effective cutting length L0 of the first blade 111 and the second blade 112 to the weight of the bare pruning machine 100 (which can be understood as a pruning machine without a battery pack and sheath) is greater than 130 mm / kg and less than 270 mm / kg. More preferably, controlling the ratio of the effective cutting length L0 to the weight of the bare pruning machine within the range of 140 mm / kg to 240 mm / kg is more effective. For example, with the ratio of effective cutting length to the weight of the bare pruning machine in the range of 150 mm / kg to 214 mm / kg, the blade assembly 11 is configured such that: the effective cutting length L0 of both the first blade 111 and the second blade 112 is in the range of 550 mm to 750 mm; the thickness of both the first blade 111 and the second blade 112 is configured to be greater than 1.8 mm and less than or equal to 2.5 mm; the number of total cutting teeth 114 of the first blade 111 and the second blade 112 is in the range of 64 to 108; and / or the weight of the transmission module 22 is configured to be 550 to 950 grams.

[0118] Furthermore, the weight of the bare pruning machine 100 is configured to be in the range of 2.6 to 4.5 kg. For example, in some embodiments, the effective cutting length LO of the first blade 111 and the second blade 112 is configured to be greater than 550 mm and less than or equal to 700 mm, the thickness of both the first blade and the second blade is configured to be greater than 1.8 mm and less than or equal to 2.5 mm, the tooth pitch P1 is in the range of 24 to 38 mm, and the weight of the first blade 111 and the second blade 112 is configured to be greater than or equal to 550 g and less than or equal to 800 g; and / or the weight of the transmission module 22 is configured to be 550 to 950 g; the weight of the bare pruning machine 100 is configured to be 2.8 to 4 kg. The weight of the bare pruning machine can be configured to be 3 kg, 3.2 kg, 3.5 kg, 3.8 kg, etc.

[0119] In the embodiments of this disclosure, the ratio of the length of the blade assembly 11 to the weight of the bare pruning machine 100 is set within the above-mentioned range, which can achieve both the cutting efficiency of the handheld pruning machine and low vibration, allowing the user to continuously hold the handheld pruning machine for a longer period of time.

[0120] The above structural designs can be combined arbitrarily. Through the combination design of at least some of the above features, the blade assembly 11 and the transmission module 22 can ensure less vibration and better strength while taking into account cutting efficiency.

[0121] In some embodiments, the pruning machine 100 includes a vibration damping module. As shown in Figures 1 to 5, 7, and 10, the main housing 3 also includes a safety guard plate 30 disposed near the front handle 311. The vibration damping module includes an elastic damping member 7 that supports the transmission housing 4 suspended in the main housing 3. Furthermore, the elastic damping member 7 is disposed between the main housing 3 and the transmission housing 4, and the elasticity of the elastic damping member 7 can be used to buffer and dampen the transmission housing 4, thereby suppressing the transmission of vibration of the transmission housing 4 to the main housing 3, further reducing the vibration transmitted to the grip 31, reducing the vibration felt by the user, and improving the user experience.

[0122] In some embodiments, as shown in Figures 2 to 5, 7, and 10, one end of the elastic damper 7 is connected to the transmission housing 4, and the other end of the elastic damper 7 is connected to the main housing 3. Specifically, at least two elastic dampers 7 are configured, namely a first elastic damper 71 and a second elastic damper 72. The first elastic damper 71 and the second elastic damper 72 are disposed on opposite sides of the transmission housing 4 along the width extension direction W.

[0123] In some embodiments, as shown in Figures 2 to 5, 7, and 10, the first elastic damper 71 and the second elastic damper 72 are respectively disposed on both sides of the transmission module 22 in the width extension direction W, with the elastic stiffness of both being not less than 5 N / mm and not greater than 15 N / mm, to suppress the transmission of vibration generated by the transmission mechanism 221 to the main housing 3. Specifically, the configuration of the elastic stiffness of the first elastic damper 71 and the second elastic damper 72 can limit the displacement of the transmission housing 4 relative to the main housing 3 in the width extension direction W, preventing direct contact between the transmission housing 4 and the main housing 3. Specifically, in this embodiment, the elastic damper 7 is configured as a spring capable of stretching and compressing; a spring is a mechanical part that works by utilizing elasticity. The specific type of spring is not limited here; for example, a spring can be, but is not limited to, a helical spring, a disc spring, a leaf spring, etc. The manufacturing material of the spring can be, but is not limited to, spring steel, copper alloy, nickel alloy, and composite materials such as carbon fiber. Springs have excellent cushioning properties and can effectively absorb vibration and impact energy.

[0124] The smaller the elastic stiffness of the first elastic damping element 71 and the second elastic damping element 72, that is, the softer the elastic damping element 7, the better the damping effect. However, through continuous research, the inventors have found that if the elastic damping element 7 is configured with too small an elastic stiffness, on the one hand, the transmission module 22 is prone to sag, and since the transmission module 22 is connected to the blade assembly 11, it will also cause the blade assembly 11 to sag, resulting in the blade assembly shaking during cutting, leading to poor cutting and affecting cutting accuracy. Moreover, when the blade assembly 11 is cutting harder branches, it will cause the transmission module 22 to have a large displacement relative to the main housing 3. The large displacement will cause the elastic damping element (such as a spring) between the main housing 3 and the transmission mechanism 221 to have a large stretching amplitude. Long-term repeated stretching will affect the elasticity of the spring structure and affect the service life of the spring. On the other hand, the pruning machine 100 has multiple angle pruning operation scenarios. Specifically, in the horizontal pruning scenario: when pruning lawns, shrubs or hedges, it is usually necessary to operate in the horizontal direction. At this time, the blade of the pruning machine is parallel to the ground, and the operator can hold the pruning machine to perform straight or curved pruning. Vertical pruning scenario: Used for pruning the side branches and crowns of tall trees or for shaping the trees. During vertical pruning, the blade is perpendicular to the ground. When the pruning machine is in a vertical pruning scenario, the overall weight of the transmission module 22 needs to be laterally supported by the elastic damping member 7. If the elastic stiffness of the elastic damping member 7 is too small, it is very easy for the transmission housing 4 to come into direct contact with the main housing 3, resulting in a greater outward transmission of vibration of the transmission mechanism 221. In the embodiments of this disclosure, the elastic stiffness of the first elastic damping member 71 and the second elastic damping member 72, which are respectively disposed on both sides of the transmission mechanism 221, are both set within the above-mentioned range. This can better support the transmission mechanism 221 in different angle operation scenarios, provide better cutting accuracy, and reduce the outward transmission of vibration of the transmission mechanism 221.

[0125] Preferably, the first elastic damper 71 and the second elastic damper 72 are respectively disposed on both sides of the transmission module 22 in the width extension direction W, with the elastic stiffness of both being not less than 7 N / mm and not greater than 14 N / mm, to suppress the transmission of vibration of the transmission module 22 to the main housing 3. It should be noted that the above features refer to the pruning machine 100 being in an unloaded state or in a normal operating state. It should be emphasized that under normal circumstances, the transmission housing 4 and the main housing 3 of the pruning machine 100 of this embodiment do not come into contact. Scenarios where the blade assembly 11 is pressed due to momentary extreme working conditions (e.g., an accident where the blade assembly is pulled by a tree branch), causing contact between the transmission housing 4 and the main housing 3, should not be considered. Specifically, the elastic stiffness of the first elastic damping member 71 and the second elastic damping member 72 can be 8N / mm, 9N / mm, 10N / mm, 11N / mm, 12N / mm, and 13N / mm.

[0126] In some embodiments, as shown in Figures 1 and 5, the vibration damping module of the pruning machine 100 further includes at least one elastic support 61 disposed between the main housing 3 and the transmission housing 4 to at least suppress the transmission of vibrations generated by the transmission mechanism 221 to the main housing 3. As shown in Figure 11, one of the elastic support 61 and the elastic damping member 7 is disposed near the front edge 42 of the transmission housing 4, and the other is disposed near the rear edge 43 of the transmission housing 4. Specifically, in the length extension direction L, the elastic damping member 7 is closer to the front handle 311 than the elastic support 61, and the elastic support 61 is closer to the rear handle 312 than the elastic damping member 7. By providing damping elements (elastic damping member 7 and elastic support 61) in both the front and rear end regions of the transmission module 22, the transmission of vibrations from the transmission module 22 to the grip portion 31 of the main housing 3 is better reduced.

[0127] Furthermore, the elastic support 61 can be supported on one side of the transmission housing 4 or on both sides of the transmission housing 4. The elastic support 61 is elastic and can provide elastic support force between the main housing 3 and the transmission housing 4. For example, the elastic support 61 can be made of an elastic material, which can include, but is not limited to, rubber or thermoplastic elastomer (TPE).

[0128] In some embodiments, as shown in FIG5, at least one elastic support 61 includes a first elastic support and a second elastic support. In the width extension direction W, the transmission housing 4 has a first side surface 44 and a second side surface 45 opposite to the first side surface 44, both extending in the length extension direction L. The first elastic support 61 is disposed between the main housing 3 and the first side surface 44, and the second elastic support 61 is disposed between the main housing 3 and the second side surface 45. This arrangement at least suppresses the transmission of vibrations generated by the transmission mechanism 221 to the main housing 3 in the width extension direction W. It also limits the displacement of the transmission housing 4 relative to the main housing 3 in the width extension direction W, thereby reducing the displacement of the blade assembly 11 driven by the transmission mechanism 221 in the width extension direction W, further reducing the swaying of the working head module during cutting, and further improving the cutting quality. Furthermore, by limiting the displacement of the transmission mechanism 4 by the elastic support 61, the elastic deformation amplitude of the elastic damper 7 can be reduced, which is beneficial to extending the service life of the elastic damper 7.

[0129] In some embodiments, the elastic damper 7 and the elastic support 61 are elastic elements of different forms. Different forms of elastic elements mean that the elastic damper 7 and the elastic support 61 have different materials, structures, etc., and at least one of their elastic stiffness, modulus, and damping ratio is different. In some embodiments, the elastic support 61 is configured as a rubber component. The elastic support 61 is made of rubber. Rubber is a highly elastic polymer material with reversible deformation. By setting the elastic support 61 as a rubber component, the elastic support 61 has both high elasticity and good support performance, effectively providing support and vibration damping. The elastic rubber component can be designed in different shapes, such as cylindrical, block, etc., and is not limited here. By simultaneously setting different forms of elastic elements, the transmission housing 4 can be elastically damped and elastically supported simultaneously, achieving simultaneous improvement in vibration and support issues. This reduces vibration while minimizing shaking during cutting, which is beneficial for simultaneously meeting the performance requirements of high cutting speed and low vibration, resulting in better cutting effect and improved user experience.

[0130] Furthermore, in the length extension direction L, the elastic support 61 is positioned closer to the motor 20 than the elastic damping member 7. Generally, the motor 20 vibrates at high frequencies, while the movement of the blade assembly 11 is low-frequency. Research has shown that for high-frequency vibrations, rubber, due to its higher damping characteristics, provides better damping than a spring. In the embodiments disclosed in this application, the leading edge 42 of the transmission housing 4 is close to the blade assembly 11; therefore, the elastic damping member 7 near the leading edge 42 of the transmission housing 4 is configured as a spring capable of stretching and compressing. The trailing edge 43 of the transmission housing 4 is closer to the motor 20 than the leading edge. Therefore, the elastic support 61 near the trailing edge 43 of the transmission housing 4 is configured as a rubber component.

[0131] In some embodiments, as shown in Figures 3, 5, and 10, the pruning machine 100 further includes a first support structure 5. The first support structure 5 limits the movement of the transmission housing 4 at least in the height extension direction H. The vibration damping module and the first support structure 5 together constitute a vibration suppression system, which is configured to suppress the vibration acceleration transmitted to the handle when the pruning machine 100 operates under no-load conditions with a total maximum reciprocating speed of the blade assembly greater than 4400 spm and less than or equal to 6000 spm. Specifically, the vibration acceleration of the front handle is no greater than 4 m / s². 2 The vibration acceleration of the rear handle is not greater than 2.5 m / s². 2 .

[0132] Along the length extension direction L, the first support structure 5 is positioned close to the elastic damper 7. On one hand, the first support structure 5 limits the displacement of the transmission mechanism 221, reducing the elastic deformation amplitude of the elastic damper 7 and extending its service life. On the other hand, as will be specifically described below, the bottom region 40 of the transmission housing 4 of the pruning machine 100 disclosed in this embodiment is exposed outside the main housing 3. The first support structure 5 and the elastic damper 7 work together to prevent damage to the structural components (e.g., the elastic damper 7) supporting the transmission module 22 suspended in the main housing, which would prevent the transmission module 22 from suddenly falling and causing the blade assembly 11 to suddenly move downwards if these components are damaged and fail to provide support.

[0133] To prevent potential injuries from movement, we ensure user safety.

[0134] As shown in Figure 11, the first blade 111 and the second blade 112 have contact planes 110 that contact each other. The first support structure 5 has a first central axis X1, and the elastic damping member 7 has a second central axis X2. In the length extension direction L, the distance L8 between the projections of the first central axis X1 and the second central axis X2 onto the contact plane 110 does not exceed 100 mm. For example, the distance L8 can be 90 mm, 80 mm, 70 mm, 60 mm, 50 mm, 40 mm, etc. Preferably, in the length extension direction L, the distance L8 between the projections of the first central axis X1 and the second central axis X2 onto the contact plane 110 does not exceed 50 mm.

[0135] The aforementioned first central axis X1 can be understood as the geometric center line of the first support structure 5 when the pruning machine 100 is placed horizontally as shown in Figure 11 and viewed from the left. For example, if the first support structure 5 is configured as a cylindrical structure, then the geometric center line of the first support structure 5 can be understood as a straight line connecting the centers of the two bottom circles. In some embodiments, the first central axis can also be understood as a straight line passing through the midpoint of the maximum length of the first support structure 5 in the length extension direction L, and parallel to the contact plane of the first blade 111 and the second blade 112. In this embodiment, the first central axis X1 is the geometric center line of the limiting mounting hole. Similarly, the second central axis X2 can be understood as the geometric center line of the elastic damping member 7. In some embodiments, the second central axis X2 can also be understood as a straight line passing through the midpoint of the maximum length of the elastic damping member 7 in the length extension direction L, and parallel to the contact plane of the first blade 111 and the second blade 112.

[0136] Specifically, the first support structure 5 includes a limiting mounting hole 51 (which can be understood as a limiting part) provided on one of the main housing 3 and the transmission housing 4 along the width extension direction W, and a support beam 52 (which can be understood as a support part) provided on the other of the main housing 3 and the transmission housing 4 along the width extension direction W. The support beam 52 passes through the limiting mounting hole 51, and the limiting mounting hole 51 at least limits the movement of the support beam 52 in the height extension direction H and / or the length extension direction L. The main housing 3 may have the limiting mounting hole 51, and the transmission housing 4 may have the support beam 52; alternatively, the main housing 3 may have the support beam 52, and the transmission housing 4 may have the limiting mounting hole 51. The limiting mounting hole 51 extends along the width extension direction W, and the support beam 52 extends along the width extension direction W. The support beam 52 passes through the limiting mounting hole 51. Specifically, one of the limiting mounting hole 51 and the support beam 52 is connected to or integrally formed on the top surface of the transmission housing 4. Furthermore, in the length extension direction L, the limiting mounting hole 51 and the support beam 52 are located on the front side of the motor 20.

[0137] In some embodiments, as shown in Figures 3 and 5, the pruning machine 100 further includes a second support structure 6 to limit the movement of the transmission housing 4 at least in the height extension direction H. The transmission housing 4 includes a leading edge 42 near the blade assembly 11 and a trailing edge 43 away from the blade assembly 11. The transmission housing 4 is provided with two support limiting regions in the length extension direction L, one of which is near the leading edge 42 of the transmission housing 4, i.e., near the first drive unit and the second drive unit; the other support limiting region is near the trailing edge 43 of the transmission housing 4, i.e., near the drive module 21. Alternatively, the first support structure 5 may be located near the leading edge 42 of the transmission housing 4, and the second support structure 6 may be located near the trailing edge 43 of the transmission housing 4. In this case, the first support structure 4 supports the support limiting region near the leading edge 42 of the transmission housing 4, and the second support structure 6 supports the support limiting region near the trailing edge 43 of the transmission housing 4. Alternatively, the first support structure 5 can be positioned near the rear edge 43 of the transmission housing 4, and the second support structure 6 can be positioned near the front edge 42 of the transmission housing 4. In this case, the first support structure 5 is positioned near the support limiting area of ​​the rear edge 43 of the transmission housing 4, and the second support structure 6 is positioned near the support limiting area of ​​the front edge 42 of the transmission housing 4. Thus, the first support structure 5 and the second support structure 6 are respectively positioned in the two support limiting areas of the transmission housing 4 to limit the two main vibration sources that generate vibration. This improves the limiting effect on the transmission housing 4 and better restricts the displacement of the transmission housing 4, which is beneficial for further reducing the amount of shaking during cutting by the working head module 1. For example, in this embodiment, the first support structure 5 is positioned near the front edge 42 of the transmission housing 4 to limit the movement of the front part of the transmission housing 4 in the height extension direction H and / or the length extension direction L. The second support structure 6 is positioned near the rear edge 43 of the transmission housing 4 to limit the movement of the rear part of the transmission housing 4 in the height extension direction H and / or the length extension direction L.

[0138] The second support structure 6 includes a first part disposed on the main housing 3 and a second part disposed on the transmission housing 4. The first part and the second part can cooperate to restrict the rear structure of the transmission module 22 from excessive displacement in the height extension direction H.

[0139] In some embodiments, as shown in Figures 3 and 17, the second support structure 6 includes a limiting post 64 disposed on one of the main housing 3 and the transmission housing 4, and a limiting groove 65 disposed on the other of the main housing 3 and the transmission housing 4. The limiting post 64 can extend into the limiting groove 65, and the limiting groove 65 limits the movement of the limiting post 64 at least in the height extension direction H. Specifically, the limiting groove 65 can be disposed on the main housing 3, and the limiting post 64 can be disposed on the transmission housing 4. There is a fitting gap (not shown) between the limiting post 64 and the limiting groove 65, which is configured to be less than or equal to 5 mm, so that the limiting post 64 and the inner wall of the limiting groove 65 are configured to be in a non-contact state, thereby limiting the excessive displacement of the transmission housing 4 relative to the main housing 3 in the height extension direction H and / or the length extension direction L. Specifically, at least two sets of the second support structures 6 (limiting posts 64 and limiting grooves 65) are configured. In the width extension direction W, the two sets of second support structures 6 are respectively disposed on both sides of the transmission housing 4 to provide stable limiting of the transmission housing 4 on opposite sides in the width extension direction W. In this embodiment, the second support structures 6 and the elastic support members 61 are configured as independently spaced elements. For example, the elastic support members 61 are disposed in front of, behind, above, or below the second support structures 6. In this case, the elastic support members 61, due to their high elasticity, can at least effectively provide vibration damping. The second support structures can effectively limit the displacement of the transmission housing 4 relative to the main housing 3 in the height extension direction H and / or length extension direction L.

[0140] Specifically, the cross-sectional shapes of the limiting post 64 and the limiting groove 65 are approximately elliptical or circular. As shown in Figure 17, the cross-sectional shape of the limiting post 64 and the limiting groove 65 is approximately circular.

[0141] The cross-sections of the limiting post 64 and the limiting groove 65 refer to the cross-sections perpendicular to the width extension direction W. The cross-sectional shape of the limiting post 64 and the limiting groove 65 can be the same or different, and this is not limited. For example, both the cross-sectional shapes of the limiting post 64 and the limiting groove 65 can be circular or elliptical. Taking a circular cross-sectional shape for the limiting post 64 as an example, the limiting post 64 can be cylindrical, frustum conical, spindle-shaped, or other shapes, and this is not limited. In some embodiments, the inner diameter of the limiting groove 65 is larger than the diameter of the limiting post 64, resulting in a gap between the limiting groove 65 and the limiting post 64.

[0142] Thus, the structure of the limiting post 64 and the limiting groove 65 is simple. With the limiting post 64 and the limiting groove 65 concentric, the size range of the gap between the limiting post 64 and the limiting groove 65 can be easily determined by setting the dimensional relationship between the diameter of the limiting post 64 and the inner diameter of the limiting groove 65. It is simple and convenient to use.

[0143] Of course, in some other embodiments, the second support structure 6 and the elastic support member 61 can be configured as a combined assembly. Specifically, as shown in FIG5, the second support structure 6 includes a mating member that mates with the elastic support member 61. The mating member includes a mounting groove 62 disposed on one of the main housing 3 or the transmission housing 4, and a mounting post 63 disposed on the other of the main housing 3 or the transmission housing 4. Specifically, in this embodiment, the mounting groove 62 is disposed on the main housing 3, and the mounting post 63 is disposed on the transmission housing 4. On the one hand, the elastic support member 61 can be fitted onto the mounting post 63, so that the mounting post 63 and the elastic support member 61 are combined in the same position area. On the other hand, the mounting groove 62 has a first shape (not shown) adapted to the mating surface 611 of the elastic support member 61, and a second shape (not shown) that can mate with the free end of the mounting post 63. In the width extension direction W, the second shape is further away from the transmission housing 4 than the first shape. The first shape and the mating surface 611 of the elastic support 61 are configured for an interference fit. Thus, the elastic support 61, in conjunction with the mounting groove 62, provides support and vibration damping in multiple directions. The second shape within the limiting groove 62 is configured for a clearance fit with the free end of the mounting post 63, meaning there is no contact between the free end of the mounting post 63 and the second shape within the limiting groove 62. This limits excessive displacement of the transmission housing 4 relative to the main housing 4 in the height extension direction H and / or length extension direction L. In this embodiment, the inventors cleverly directly sleeve the elastic support 61 and the mounting post 63 together. Furthermore, in the width extension direction W, the mounting groove 62 is provided with different shapes to allow the sleeved elastic support 61 and mounting post 63 to cooperate with the same mounting groove 62 for rear limiting. This allows the vibration damping support 6 to buffer and dampen vibrations while simultaneously limiting movement through the cooperation of the mounting post 63 and the mounting groove 62, simplifying the structural design. Preferably, the first elastic support member 61 and the second elastic support member 62 located on both sides of the transmission housing 4 are fitted with the aforementioned fitting members, so that the left and right sides of the rear edge of the transmission housing 4 can be stably limited relative to the main housing, preventing excessive displacement. More preferably, the fitting members located on both sides of the transmission housing 4 are symmetrically arranged in the width extension direction W.

[0144] By setting vibration damping and support limiting structures at the front edge 42 and rear edge 43 of the transmission housing 4 respectively, the vibration damping requirements of the pruning machine 100 can be met. At the same time, the displacement of the transmission housing 4 during the operation of the pruning machine 100 can be limited. This effectively reduces vibration and reduces the shaking of the working head module 1. It also reduces the impact of vibration on cutting accuracy and improves the safety of user operation. This is conducive to simultaneously meeting the performance of high cutting speed and low vibration, resulting in better cutting effect and improved user experience.

[0145] In some embodiments, as shown in Figures 3, 5, 11, and 18, Figure 11 is a front view of a portion of the structure of a pruning machine 100 according to some embodiments of this application. The transmission housing 44 has a length L2 in the length extension direction L, and the distance L1 between the first support structure 5 and the second support structure 6 is greater than or equal to one-third of the length L2 of the transmission housing 44.

[0146] The distance L1 between the first support structure 5 and the second support structure 6 refers to the distance between the adjacent sides of the support beam 52 and the second support structure 6 (e.g., the limiting post 64 or the mounting post 63) in the length extension direction L. It can be understood that the distance L1 between the first support structure 5 and the second support structure 6 is less than the length L2 of the transmission housing 4. By setting the distance L1 between the first support structure 5 and the second support structure 6 to be greater than or equal to one-third of the length L2 of the transmission housing 4, the supporting force provided by the first support structure 5 and the second support structure 6 can be distributed evenly across the transmission housing 4. This improves the supporting and limiting effect on the transmission housing 4, resulting in better support stability and reliability. It also helps to further limit the displacement of the transmission housing 4 during vibration, thereby reducing the amount of shaking during cutting by the working head module, reducing the impact of shaking on cutting accuracy, improving cutting quality, and enhancing the cutting effect.

[0147] In this embodiment of the pruning machine 100, the transmission module 22 is suspended and supported on the main housing 3, so that the transmission housing 4 and the main housing 3 do not directly contact each other, i.e., there is a gap between the transmission housing 4 and the main housing 3, and the transmission housing 4 and the main housing 3 are connected by an elastic element to reduce the direct transmission of vibration source to the grip part 31 of the main housing 3. The transmission module 22 is poweredly connected to the blade assembly 11, that is, the vibration source part of the pruning machine 100 is suspended and installed on the main housing 3 to reduce the transmission of vibration source to the main housing 3. This reduces the vibration felt by the user and reduces the user's fatigue during long-term operation.

[0148] Specifically, as described in the above embodiments, a first elastic damping member 71, a second elastic damping member 72, and at least one elastic support member 61 are provided between the transmission module 22 and the main housing 3 in the width extension direction W.

[0149] In some embodiments, as shown in Figures 2, 6, and 7, there is a gap between the main housing 3 and the transmission housing 4. The transmission housing 4 is movably disposed on the main housing 3, so that the transmission housing 4 and the main housing 3 do not directly contact each other, which can reduce the direct transmission of vibration to the main housing 3 and thus reduce the impact on user experience. That is, the transmission module 22 and the main housing 3 are elastically supported by at least elastic damping members 7 (first elastic damping member 71, second elastic damping member) and / or elastic support members 61, which can move in multiple directions, so as to achieve low vibration when the pruning machine 100 is in normal operation.

[0150] In some embodiments, the main housing 3 may provide installation space, and the transmission housing 4 may be at least partially housed within the main housing 3.

[0151] In some embodiments, as shown in FIG18, there is a gap between the outer wall of the support beam 52 and the inner wall of the limiting mounting hole 51, which is configured to be greater than or equal to 2 mm, such that the movable amount of the support beam 52 in the limiting mounting hole 51 is greater than or equal to 2 mm. Specifically, in the height extension direction H, there is a first gap d1 between the outer wall of the support beam 52 and the inner wall of the limiting mounting hole 51. In the length extension direction L, there is a second gap d2 between the outer wall of the support beam 52 and the inner wall of the limiting mounting hole 51. Both the first gap d1 and the second gap d2 are configured to be greater than or equal to 2 mm and less than or equal to 6 mm. The above-mentioned gaps ensure that, under normal conditions, the support beam 52 and the inner wall of the limiting mounting hole 51 are configured to be in a non-contact state (i.e., the support beam 52 does not touch the limiting mounting hole 51), so as to minimize the vibration transmission of the transmission module 22 to the main housing 3. In abnormal conditions, such as when the blade assembly 11 is pulled by a foreign object, the support beam 52 and the limiting mounting hole 51 can support and limit the transmission module, reducing the displacement of the transmission module 22.

[0152] Preferably, the distance between the outer wall of the support beam 52 and the inner wall of the limiting mounting hole 51 is configured to be within the range of 2 to 4 mm. In a specific embodiment, as shown in FIG17, the distance between the outer wall of the support beam 52 and the inner wall of the limiting mounting hole 51 is equal to 3 mm. The inventors have found that if the distance is too large, such as exceeding the elastic deformation of the spring, it will affect the life of the spring. Since the first support structure 5 buffers the vibration of the transmission housing 4 through the movement of the support beam 52 in the limiting mounting hole 51, when the pruning machine 100 is working, the vibration of the transmission housing 4 does not exceed 2 to 4 mm. For example, the amplitude of the transmission housing 4 can be in the range of 1.5 mm to 2 mm. At this time, the movement of the support beam 52 can effectively buffer and reduce the vibration of the transmission housing 4, effectively reducing the vibration transmitted to the grip part 31 of the main housing 3, reducing the vibration felt by the user, and improving the user experience.

[0153] The support beam 52 can move within a certain space relative to the limiting mounting hole 51, that is, the support beam 52 and the limiting mounting hole 51 are in clearance fit.

[0154] In some embodiments, the cross-sectional shapes of the support beam 52 and the limiting mounting hole 51 are approximately elliptical or circular. As shown in Figure 9, the cross-sectional shape of the support beam 52 and the limiting mounting hole 51 is approximately elliptical. As shown in Figure 17, the cross-sectional shape of the support beam 52 and the limiting mounting hole 51 is approximately circular.

[0155] The cross-sections of the support beam 52 and the limiting mounting hole 51 refer to the cross-sections perpendicular to the width extension direction W. The cross-sectional shape of the support beam 52 and the limiting mounting hole 51 can be the same or different, and this is not limited. For example, both the cross-sectional shapes of the support beam 52 and the limiting mounting hole 51 can be circular or elliptical. Taking a circular cross-sectional shape for the support beam 52 as an example, the support beam 52 can be cylindrical, or it can be a frustum conical, spindle-shaped, or other shapes, and this is not limited. In some embodiments, the inner diameter of the limiting mounting hole 51 is larger than the diameter of the support beam 52, resulting in a gap between the limiting mounting hole 51 and the support beam 52.

[0156] Thus, the structure of the support beam 52 and the limiting mounting hole 51 is simple. With the support beam 52 and the limiting mounting hole 51 concentric, the distance between the support beam 52 and the limiting mounting hole 51 can be easily determined by setting the dimensional relationship between the diameter of the support beam 52 and the inner diameter of the limiting mounting hole 51. This makes it simple and convenient to use.

[0157] In some embodiments, the support beam 52 is disposed in the main housing 3, and the limiting mounting hole 51 is disposed in the transmission housing 4.

[0158] In some embodiments, as shown in Figures 3, 5, and 10, the main housing 3 may include a first half-shell 32 and a second half-shell 33. The support beam 52 may be a single beam. One of the first half-shell 32 and the second half-shell 33 is fixedly connected to the support beam 52, while the other has a corresponding connecting hole 34. The first half-shell 32 and the second half-shell 33 are detachably fastened together by engaging with the support beam 52 through the connecting hole 34. For example, the connecting hole 34 may be a screw hole, and the support beam 52 can be connected via a screw post 35 and the connecting hole 34. When installing the main housing 3 and the transmission housing 4, the support beam 52 passes through the limiting mounting hole 51 on the transmission housing 4, the first half-shell 32 and the second half-shell 33 are fastened together, and the support beam 52 engages with the connecting hole 34, thereby connecting the main housing 3 and the transmission housing 4. The support beam 52 may also include two short support beams, which are respectively disposed on the first half-shell 32 and the second half-shell 33. During installation, the two short support beams are respectively inserted into the limiting mounting holes 51 on the transmission housing 4 and connected together, thereby engaging and connecting the first half-shell 32 and the second half-shell 33. The support beam 52 may be integrally formed with the first half-shell 32 and / or the second half-shell 33, or it may be a separate component; no specific limitation is made here. In some embodiments, a mounting portion 41 protrudes from the transmission housing 4 along the height extension direction H, and the limiting mounting hole 51 extends through the mounting portion 41 along the width extension direction W.

[0159] This design makes the installation of the main housing 3 and the transmission housing 4 simpler and more convenient.

[0160] In some embodiments, as shown in Figures 7 and 19, the main housing 3 and the transmission housing 4 have an opening 300 that faces downward along the height extension direction H and is in fluid communication with the outside in the width extension direction W. At least part of the opening 300 is configured to be visible when viewed from bottom to top in the height extension direction H.

[0161] In some embodiments, as shown in FIG7, when observing the pruning machine 100 from directly below the motor 20, the transmission housing 4 includes a first side edge 46 and a second side edge 47 opposite to the first side edge 46, both the first side edge 46 and the second side edge 47 extending back and forth along the length extension direction L. When observing the pruning machine 100 from directly below the motor 20, the main housing 3 includes a third side edge 301 and a fourth side edge 302 extending back and forth along the length extension direction L. The first side edge 46 and the third side edge 301 are arranged opposite each other in the width extension direction W, and the second side edge 47 and the fourth side edge 302 are arranged opposite each other. The opening 300 includes a first opening 303 opening between the first side edge 46 and the third side edge 301 in the width extension direction W, and a second opening 304 opening between the second side edge 47 and the fourth side edge 302 in the width extension direction W.

[0162] In some embodiments, as shown in FIG19, when the pruning machine 100 is viewed directly below the motor 20, at least a portion of the bottom region 40 of the transmission housing 4 is exposed outside the main housing 3. Specifically, in this embodiment, the entire bottom surface of the transmission housing 4 is exposed outside the main housing 3. That is, considering the compactness and miniaturization of the machine, the main housing 3 does not provide any shielding or support for the bottom surface of the transmission housing 4.

[0163] Furthermore, as shown in Figures 17 and 18, the transmission housing 4 includes a first portion 48 housed inside the main housing 3 and a second portion 49 housing at least a portion of the deceleration structure 222. In the height extension direction H, the second portion 49 protrudes downwards and is exposed outside the opening 300. The shortest distance between the plane containing the opening 300 and the lowest surface of the transmission housing 4 in the height extension direction H is greater than or equal to 31 mm. In this embodiment, by setting the second portion 49 to protrude downwards and be exposed outside the opening 300 in the height extension direction H, when the user holds the pruning machine with both hands and manipulates it to reciprocate within a certain plane for pruning and cutting, it can reduce the likelihood of branches, shrubs, etc., located within that plane getting stuck or inserted through the opening 300, thus reducing the chance of the pruning machine getting stuck.

[0164] In some embodiments, as shown in Figures 17 and 19, a first damping gap W1 and a second damping gap W2 are formed between the main housing 3 and the transmission housing 4 in the width extension direction W. Because of these damping gaps, the main housing 3 and the transmission housing 4 will not come into contact in the width extension direction W.

[0165] The first damping spacing W1 and the second damping spacing W2 are both configured to be less than or equal to 10 mm. Further, the first damping spacing W1 and the second damping spacing W2 are both configured to be less than or equal to 6 mm. Preferably, the first damping spacing W1 and the second damping spacing W2 are both configured to be 3 to 5 mm. Specifically, when observing the pruning machine 100 from directly below the motor 20, the first damping spacing W1 can be understood as the minimum spacing between the first side edge 46 and the third side edge 301 in the width extension direction W. The second damping spacing W2 can be understood as the minimum spacing between the second side edge 47 and the fourth side edge 302 in the width extension direction W. Further, when observing the pruning machine 100 from directly below the motor 20, a third spacing W3 is formed between the transmission housing 4 and the main housing 3 in the length extension direction L, and the dimension of the third spacing W3 is larger than the second spacing d2. The aforementioned vibration damping spacing range, combined with the aforementioned elastic damping element 7 and / or elastic support element 6, ensures that the transmission housing 4 minimizes direct contact with the main housing 3 during normal operation of the blade assembly 11 (both horizontal and vertical trimming scenarios), reducing direct vibration transmission. However, if the blade assembly 11 is pressed down by hard branches or other foreign objects, causing the transmission module 22 to shift downwards, the first support structure 5 can suppress excessive displacement of the transmission module 22 relative to the main housing 3 in the height extension direction H. Specifically, the support beam 52 abuts against the inner wall of the limiting mounting hole 51, preventing excessive displacement of the transmission module 22 in the height extension direction H.

[0166] As described above, in the pruning machine 100 of this application embodiment, the transmission module 22 is suspended and supported on the main housing 3. The transmission housing 4 is also suspended and supported on the main housing 3. By setting a vibration damping gap between the transmission housing 4 and the main housing 3, the transmission housing 4 is movably mounted on the main housing 3, thereby suspending the vibration source of the pruning machine 100 on the main housing 3. This reduces the vibration transmitted to the grip part 31 of the main housing 3, reduces the vibration felt by the user, and reduces the user's fatigue during long-term operation. It is understood that the suspension support here should be understood as the transmission module 22 or the transmission housing 4 being movable within the main housing 3, and the transmission module 22 or the transmission housing 4 not being in direct contact with the main housing 3. In the embodiments disclosed in this application, by providing a first elastic damping member 71, a second elastic damping member 72, and at least one elastic support member 61 between the transmission module 22 and the main housing 3 in the width extension direction W, the transmission module 22 and the main housing are movably connected.

[0167] Furthermore, by setting the first support structure 5, the movement of the leading edge of the transmission housing 4 in the height extension direction H and / or length extension direction L can be limited, thereby restricting the movement of the transmission housing 4 relative to the main housing 3. Similarly, by setting the second support structure 6, the movement of the trailing edge of the transmission housing 4 in the height extension direction H and / or length extension direction L can be limited, again restricting the movement of the transmission housing 4 relative to the main housing 3. Thus, the first support structure 5 and the second support structure 6 cooperate to form a multi-point limiting structure between the main housing 4 and the transmission housing 3, effectively limiting the movement of the main housing 3 relative to the transmission housing 4, thereby reducing the displacement of the main housing 4 due to vibration. Since the displacement of the transmission housing 4 is reduced, the displacement of the drive mechanism 2 due to vibration can be reduced, thereby reducing the amount of swaying during cutting by the working head module, thus improving the swaying problem caused by the suspended structure. The reduced swaying of the working head module reduces the impact of swaying on cutting accuracy, which is beneficial for improving cutting quality. It also increases the cutting speed of the working head module, which is beneficial for improving the cutting effect. In this way, the pruning machine 100 can reduce the vibration transmitted to the grip 31 while reducing the shaking during cutting, which is conducive to meeting the performance requirements of high cutting speed and low vibration at the same time, resulting in better cutting effect and improved user experience.

[0168] The above structural designs can be combined arbitrarily. Through the combination design of at least some of the above features, the pruning machine 100 can ensure less vibration and better strength while taking into account cutting efficiency.

[0169] In some embodiments, as shown in Figures 3, 9 to 11, the pruning machine 100 further includes a vibration isolation sleeve 8 fitted between the support beam 52 and the limiting mounting hole 51. The vibration isolation sleeve 8 is at least partially made of an elastic or flexible material. The elastic or flexible vibration isolation sleeve 8 achieves a clearance fit between the support beam 52 and the limiting mounting hole 51. Specifically, the vibration isolation sleeve 8 is configured such that the distance the support beam 52 can move relative to the limiting mounting hole 51 in the length extension direction L is greater than the distance the support beam 52 can move relative to the limiting mounting hole 51 in the height extension direction H.

[0170] A vibration isolation sleeve 8 is disposed between the support beam 52 and the inner wall of the limiting mounting hole 51, with the inner wall of the limiting mounting hole 51 supported on the support beam 52 by the vibration isolation sleeve 8. The vibration isolation sleeve 8 is at least partially made of an elastic or flexible material to give it elasticity or flexibility. For example, elastic materials may include, but are not limited to, rubber or thermoplastic elastomers (TPE). Flexible materials may include, but are not limited to, polyurethane (PU), acrylic resin, and other polymers with good bending plasticity. By providing an elastic or flexible vibration isolation sleeve 8 supported between the support beam 52 and the inner wall of the limiting mounting hole 51, it can play a role in elastic vibration reduction or buffering energy absorption. The vibration isolation sleeve 8 is used for vibration isolation, which can reduce the transmission of vibration from the transmission housing 4 to the main housing 3 through the support beam 52, thereby further reducing the transmission of vibration to the grip 31, reducing the vibration felt by the user, reducing user fatigue during long-term operation, and improving the user experience.

[0171] Meanwhile, by designing the structure and / or material of the vibration isolation sleeve 8, the distance that the support beam 52 can move relative to the limiting mounting hole 51 in the length extension direction L is greater than the distance that the support beam 52 can move relative to the limiting mounting hole 51 in the height extension direction H.

[0172] For example, in some embodiments, the vibration isolation sleeve 8 has a through-hole 81, through which the vibration isolation sleeve 8 is movably fitted onto the support beam 52, and the support beam 52 can move within the inner hole 81. The inner diameter of the inner hole 81 along the length extension direction L can be set to be larger than the inner diameter along the height extension direction H, so that the distance the support beam 52 can move relative to the limiting mounting hole 51 in the length extension direction L is greater than the distance the support beam 52 can move relative to the limiting mounting hole 51 in the height extension direction H.

[0173] Of course, in some other embodiments, the vibration isolation sleeve 8 and the support beam 52 are interference-fitted in the height extension direction W, so that the movable displacement of the support beam 52 relative to the vibration isolation sleeve 8 in the height extension direction W can be limited to zero.

[0174] In some embodiments, the deformability of the vibration isolation sleeve 8 in the length extension direction L can be set to be greater than that in the height extension direction H. The deformation of the vibration isolation sleeve 8 causes the support beam 52 to move relative to the limiting mounting hole 51, thereby making the distance that the support beam 52 can move relative to the limiting mounting hole 51 in the length extension direction L greater than the distance that the support beam 52 can move relative to the limiting mounting hole 51 in the height extension direction H.

[0175] Since the distance that the support beam 52 can move relative to the limiting mounting hole 51 in the height extension direction H directly affects the displacement of the transmission housing 4 relative to the main housing 3 in the height extension direction H, by setting the vibration isolation sleeve 8 to make the distance that the support beam 52 can move relative to the limiting mounting hole 51 in the height extension direction H smaller, it can limit the displacement of the transmission housing 4 relative to the main housing 3 in the height extension direction H while reducing vibration. This is beneficial to improving the vibration reduction effect and reducing the amount of shaking of the working head module during cutting, avoiding large shaking during cutting that affects cutting accuracy, and improving cutting quality. Moreover, since the shaking of the working head module is reduced, the cutting speed of the working head module can be increased, which is beneficial to simultaneously meeting the performance requirements of high cutting speed and low vibration, improving cutting effect and user experience.

[0176] In some embodiments, as shown in Figures 10, 12, and 13, Figure 12 is a three-dimensional structural schematic diagram of the vibration isolation sleeve 8 of some embodiments of this application, and Figure 13 is a three-dimensional structural schematic diagram of the vibration isolation sleeve 8 of some embodiments of this application from another perspective. The vibration isolation sleeve 8 includes a lug portion 82 and a stop portion 83. The lug portion 82 and the stop portion 83 are sequentially connected along the axial direction of the inner hole 81, and the outer diameter of the stop portion 83 is larger than the outer diameter of the lug portion 82, so that the axial cross-sectional shape of the vibration isolation sleeve 8 is L-shaped. The lug portion 82 is disposed inside the limiting mounting hole 51, and the stop portion 83 is located outside the limiting mounting hole 51 and abuts against the axial end face of the limiting mounting hole 51, so as to install the vibration isolation sleeve 8 in the limiting mounting hole 51.

[0177] In some embodiments, the stop portion 83 of the vibration isolation sleeve 8 can abut against the axial end face of the limiting mounting hole 51 and the main housing 3 or transmission housing 4 in the width extension direction W. The stop portion 83 can play a vibration isolation role in the width extension direction W, further reducing the vibration transmitted to the grip portion 31 of the main housing 3. The stop portion 83 can also provide support force in the width extension direction W, which restricts the relative displacement between the transmission housing 4 and the main housing 3 while isolating vibration. This helps to reduce the displacement of the drive mechanism 2, thereby reducing the amount of shaking when the working head module is cutting, improving the cutting quality and enhancing the user experience.

[0178] In some embodiments, the lug 82 is interference-fitted with the limiting mounting hole 51. The lug 82 can be embedded in the limiting mounting hole 51 to interference-fit the vibration isolation sleeve 8 into the limiting mounting hole 51. In this way, the vibration isolation sleeve 8 is more stable in the limiting mounting hole 51 and less prone to shaking, which helps to reduce the amount of shaking during the cutting of the working head module and improve the cutting quality.

[0179] In some embodiments, as shown in FIG10, vibration isolation sleeves 8 are provided at both axially opposite ends of the limiting mounting hole 51. The two vibration isolation sleeves 8 respectively abut against the axial end faces of the two axial ends of the limiting mounting hole 51. The support beam 52 passes through the two vibration isolation sleeves 8. In this way, the supporting force distribution on the support beam 52 is more dispersed, the supporting force distribution provided by the first support structure 5 is more uniform, and the support between the transmission housing 4 and the main housing 3 is more stable and reliable. This is beneficial to further reduce the amount of shaking during cutting of the working head module, improve the cutting quality, and enhance the user experience.

[0180] In some embodiments, as shown in Figures 12 and 13, the vibration isolation sleeve 8 further includes an insert 84, which is embedded in the inner hole 81 of the vibration isolation sleeve 8. The support beam 52 passes through the insert 84, and there is a gap between the outer wall of the support beam 52 and the inner wall of the insert 84. By providing the insert 84, the support beam 52 is held in the inner hole 81 of the vibration isolation sleeve 8 with a gap, which can further reduce the transmission of vibration to the main housing 3 through the support beam 52, thereby reducing the transmission of vibration to the grip part 31 and improving the user experience.

[0181] In some embodiments, as shown in Figures 3, 5, and 14 to 16, Figure 14 is a cross-sectional view of section DD in Figure 7, Figure 15 is an enlarged structural schematic diagram of point E in Figure 8, and Figure 16 is a partially enlarged cross-sectional view of the pruning machine 100 in some embodiments of this application. The pruning machine 100 also includes a barrier 9. The main housing 3 is provided with an independent and spaced-apart air inlet 35 and an air outlet 36. The motor 20 is disposed inside the main housing 3. The motor 20 also includes a motor air inlet 211, a motor air outlet 212, and an internal flow space 213 connecting the motor air inlet 211 and the motor air outlet 212. The barrier 9 is disposed between the motor and the main housing 3, and the barrier 9 cooperates with the motor to divide the inner cavity of the main housing 3 into an air inlet area 37 and an air outlet area 38. The housing air inlet 35 and the motor air inlet 211 are connected to the air intake area 37, and the housing air outlet 36 and the motor air outlet 212 are connected to the air outlet area 38. The motor 20 includes a power output shaft 214 and a motor outer wall 215 extending along the power output shaft 214, with a gap D between the motor outer wall 215 and the main housing 3. The baffle 9 is configured to block airflow from the air outlet area 38 through the gap between the motor outer wall 215 and the main housing 3 to the air intake area 37.

[0182] The hollow arrows in Figures 14 and 15, and the dashed arrows in Figure 16, indicate the direction of airflow.

[0183] The power output shaft 214 of the motor 20 is connected to the working head module (blade assembly 11) to provide driving force for the working head module. The outer wall 215 of the motor extends along the extension direction of the power output shaft 214. The internal circulation space 213 of the motor 20 is located inside the outer wall 215 of the motor. The air inlet 211 and the air outlet 212 of the motor are connected to the internal circulation space 213.

[0184] The main housing 3 provides installation space. The motor 20 is installed within the installation space of the main housing 3, and a gap is provided between the outer wall 215 of the motor and the main housing 3. The working head module and the motor will vibrate during operation. By providing a gap between the outer wall 215 of the motor and the main housing 3, the outer wall 215 of the motor does not directly contact the main housing 3, reducing the direct transmission of vibration generated by the motor to the main housing 3. This reduces the vibration felt by the user, helps reduce user fatigue during long-term operation, and improves the user experience.

[0185] The air inlet 35 and air outlet 36 of the housing are connected to the installation space of the main housing 3. The air inlet 35 is used for air intake of the main housing 3, and the air outlet 36 is used for air exhaust of the main housing 3. Since the air inlet 35 and air outlet 36 are independent and spaced apart, the air intake and exhaust positions of the main housing 3 are far apart, which can reduce mutual interference between the air intake and exhaust of the main housing 3.

[0186] A baffle 9 is disposed inside the main housing 3 and located between the motor and the main housing 3. The baffle 9, in conjunction with the motor, forms two mutually isolated chambers within the main housing 3, creating an independent air intake area 37 and an air outlet area 38. The specific structure of the baffle 9 is not limited here, as long as it can cooperate with the motor to divide the internal installation space of the main housing 3 into two independent chambers. That is, the air intake area 37 is the airflow inlet chamber, and the air outlet area 38 is the airflow outlet chamber. The housing air inlet 35 is connected to the motor air inlet 211 through the air intake area 37, and the housing air outlet 36 is connected to the motor air outlet 212 through the air outlet area 38. The air intake area 37 and the air outlet area 38 are fluidly connected by the internal flow space 213 of the motor. When the pruning machine 100 is working, external airflow is drawn into the air intake area 37 through the air inlet 35 of the machine casing, and then enters the internal circulation space 213 of the motor through the air inlet 211. The airflow flowing through the motor flows into the air outlet area 38 through the motor outlet 212, and is then blown out through the air outlet 36 of the machine casing. The external airflow can exchange heat and cool the motor as it passes through the motor, which can reduce the operating temperature of the motor and prevent the motor from overheating and failing.

[0187] By setting the barrier 9, the barrier 9 blocks the airflow from the air outlet area 38 through the gap between the motor outer wall 215 and the main unit housing 3 to the air inlet area 37, so that the barrier 9 can suppress the airflow from the motor air outlet 212 and the airflow from the housing air outlet 36 into the main unit housing 3 through the gap between the motor outer wall 215 and the main unit housing 3 to the motor air inlet 211.

[0188] By reducing the backflow of hot air from the motor outlet 212 to the motor inlet 211 within the main housing 3, the problem of reduced motor efficiency caused by the inhalation of hot air from the main housing 3 is mitigated. Simultaneously, it suppresses the backflow of air from the main housing 3 to the inlet 35, reducing the obstruction of cooling air entering the main housing 3 due to this backflow. This reduces interference between the intake and exhaust air within the main housing 3 and guides airflow into the motor inlet 211, further reducing airflow loss into the motor. Reduced airflow loss improves the motor's heat dissipation performance and lowers its operating temperature. Furthermore, reducing the intrusion of air carrying foreign matter from the outlet 36 into the motor inlet 211 minimizes the inflow of unclean air into the motor. All of this contributes to improved motor reliability and extended motor lifespan.

[0189] Thus, by setting a barrier 9 between the motor 20 and the main housing 3, the barrier 9 blocks the airflow from the outlet area 38 through the gap between the motor outer wall 215 and the main housing 3 to the inlet area 37. This can suppress the airflow from the motor outlet 212 and the airflow entering the main housing 3 from the housing outlet 36 from the main housing to flow through the gap between the motor outer wall 215 and the main housing 3 to the motor inlet 211. This can reduce the airflow loss of the motor, improve the heat dissipation performance of the motor, and reduce the flow of unclean air into the motor. This can also improve the reliability of the motor, extend the service life of the motor, and enhance the user experience.

[0190] In some embodiments, as shown in FIG3, the pruning machine 100 may further include a filter screen 10, which is disposed over the air inlet 35 of the machine housing. When the pruning machine 100 is working, airflow flows into the main housing 3 from the air inlet 35. By providing the filter screen 10 at the air inlet 35, the incoming airflow can be filtered, reducing the amount of external dust, broken leaves, and other debris entering the motor. This results in cleaner airflow into the motor, which is beneficial for improving motor reliability and extending motor lifespan.

[0191] In some embodiments, as shown in Figures 14 to 16, the pruning machine 100 is configured such that at least part of the airflow flows into the air inlet area 37 from the housing air inlet 35, then into the internal circulation space 213 from the motor air inlet 211, then out to the air outlet area 38 from the motor air outlet 212, and finally flows to the outside of the housing 3 from the housing air outlet 36.

[0192] By controlling the direction of airflow, at least part of the airflow can pass through the inside of the motor, heat exchange and cooling can be achieved, effectively reducing the operating temperature of the motor, preventing overheating failure, and improving motor reliability and extending its service life.

[0193] In some embodiments, as shown in FIG15, the drive mechanism 2 may further include a fan 23, which is disposed at one end of the motor 20 along the extension direction of the power output shaft 214. The fan 23 may be disposed near the motor air inlet 211 or near the motor air outlet 212. When the fan 23 is working, it can generate airflow through the motor to cool and dissipate heat. By configuring the fan 23, the airflow direction can be controlled.

[0194] In some embodiments, the drive mechanism 2 may further include an electrical component 24 for controlling the motor. The electrical component 24 may be disposed in the air outlet area 38, and the airflow from the motor outlet 212 will flow over the electrical component 24. The electrical component 24 may include a control board. By arranging the electrical component 24 in the flow path of the cooling airflow, heat can be dissipated from the electrical component 24, preventing the electrical component 24 from overheating, which is beneficial to improving the reliability of the motor.

[0195] In some embodiments, the barrier 9 is configured to be at least partially made of an elastic or flexible material.

[0196] The barrier 9 can be integrally molded from an elastic or flexible material, or a portion of the barrier 9 can be made from an elastic or flexible material; there are no limitations on this. For example, elastic materials can include, but are not limited to, rubber or thermoplastic elastomers (TPE). Flexible materials can include, but are not limited to, polyurethane (PU), acrylic resin, and other polymers with good bending plasticity. In some specific embodiments, the barrier 9 can be a rubber component. In some embodiments, the main housing 3 and the motor are connected to the barrier 9, so that the connection between the motor and the main housing 3 is flexible. This flexible connection can reduce the vibration transmission from the motor to the main housing 3.

[0197] Thus, at least a portion of the barrier 9 is elastic or flexible. The barrier 9 is disposed between the motor and the main housing 3, which can play a buffering and vibration reduction role, reduce the vibration transmission from the motor to the main housing 3, and reduce the direct transmission of motor vibration to the grip part 31 of the main housing 3, thereby reducing the vibration felt by the user, which helps to reduce the user's fatigue during long-term operation and improve the user experience.

[0198] In other embodiments, the barrier 9 is configured to be at least partially made of a rigid material, and a gap is provided between the barrier 9 and the main housing 3.

[0199] The rigid material can include, but is not limited to, plastics, composite materials, and hardware materials. For example, plastics can be engineering plastics. By making at least a portion of the barrier 9 a rigid material, the barrier 9 can have good dimensional stability and effectively block airflow. At the same time, by providing a gap between the barrier 9 and the main housing 3, vibration can be reduced from being directly transmitted to the main housing 3, which helps to reduce the vibration felt by the user.

[0200] In some embodiments, as shown in Figures 15 and 16, the housing air inlet 35 includes a front end face away from the housing air outlet 36 and a rear end face near the housing air outlet 36 in the extension direction along the power output shaft 214; the housing air outlet 36 includes a front end face near the housing air inlet 35 and a rear end face away from the housing air inlet 35 in the extension direction along the power output shaft 214; the barrier 9 is disposed between the rear end face of the housing air inlet 35 and the front end face of the housing air outlet 36.

[0201] The baffle 9 is positioned between the rear end face of the air inlet 35 and the front end face of the air outlet 36 of the housing. This means that the baffle 9 will not extend beyond the rear end face of the air inlet 35 or the front end face of the air outlet 36 in the extension direction of the power output shaft 214. This arrangement places the baffle 9 in a position that has minimal impact on the intake and exhaust airflow, reducing its obstruction of the air inlet 35 and the air outlet 36, thus minimizing airflow loss and improving heat dissipation performance.

[0202] In some embodiments, as shown in Figures 14 to 16, the barrier 9 is annular; the barrier 9 includes a housing connection portion 91, a motor connection portion 92, and an intermediate extension portion 93. The housing connection portion 91 is configured to mount the barrier 9 to the main housing 3. The motor connection portion 92 is configured to mount the barrier 9 to a motor. The intermediate extension portion 93 extends between the housing connection portion 91 and the motor connection portion 92.

[0203] The annular barrier 9 is conveniently fitted into the annular gap between the motor outer wall 215 and the main housing 3. The barrier 9 is installed to the main housing 3 via the housing connection part 91. The installation method between the housing connection part 91 and the main housing 3 is not limited here; it can include, but is not limited to, snap-fit, adhesive, or fastener connection. The barrier 9 is installed to the motor via the motor connection part 92. The installation method between the motor connection part 92 and the motor is not limited here; it can include, but is not limited to, snap-fit, adhesive, or fastener connection. An intermediate extension 93 connects the housing connection part 91 and the motor connection part 92, blocking the gap between the motor outer wall 215 and the main housing 3, thereby preventing airflow through the gap. The specific shape and material of the intermediate extension 93 are not limited here; any material capable of blocking airflow is acceptable.

[0204] This makes it easy to install the barrier 9 in the gap between the main housing 3 and the outer wall 215 of the motor. The barrier 9 can effectively block the airflow from flowing through the gap between the main housing 3 and the outer wall 215 of the motor, reduce the airflow loss of the motor intake, and reduce the flow of unclean airflow into the motor. This is beneficial to improving the reliability of the motor and extending its service life. Moreover, the barrier 9 has a simple structure, is easy to manufacture, and can reduce costs.

[0205] In some embodiments, as shown in Figures 15 and 16, the motor connection portion 92 includes a motor engagement end face 921. The motor engagement end face 921 is configured to engage with the motor and is located near the end face of the intermediate extension portion 93. When airflow reaches the motor engagement end face 921, it is guided to flow towards the direction near the motor air inlet 211. In the extension direction of the motor's power output shaft 214, the distance L3 between the motor engagement end face 921 and the motor air inlet 211 is less than the distance L4 between the motor engagement end face 921 and the motor air outlet 212.

[0206] The motor connection portion 92 can guide the airflow entering from the housing air inlet 35 towards the motor air inlet 211. Simultaneously, the motor engagement end face 921 is relatively closer to the motor air inlet 211, thus positioning the motor connection portion 92 of the barrier 9 near the motor air inlet 211. This better guides the airflow entering from the housing air inlet 35 towards the direction closer to the motor air inlet 211, facilitating the guidance of cooling airflow into the motor, thereby improving airflow efficiency and enhancing the motor's heat dissipation performance.

[0207] In some embodiments, as shown in Figures 15 and 16, the housing connection portion 91 includes a housing engagement end face 911, which is configured to engage with the main housing 3 and is located near the intermediate extension portion 93. When airflow reaches the housing engagement end face 911, it is guided to flow in the direction of the intermediate extension portion 93. In the extension direction of the motor's power output shaft 214, the distance L5 between the housing engagement end face 911 and the housing air inlet 35 is less than the distance L6 between the housing engagement end face 911 and the housing air outlet 36.

[0208] The housing connection portion 91 guides the airflow entering from the housing air inlet 35 towards the intermediate extension portion 93. The intermediate extension portion 93 receives the airflow entering from the housing air inlet 35 and directs the airflow along the intermediate extension portion 93 towards the motor connection portion 92. The motor connection portion 92 then guides the airflow towards the motor air inlet 211, thus the barrier 9 effectively concentrates the airflow. Simultaneously, the housing joint end face 911 is relatively closer to the housing air inlet 35, thereby positioning the housing connection portion 91 of the barrier 9 near the housing air inlet 35. This better guides the airflow entering from the housing air inlet 35 towards the intermediate extension portion 93, resulting in better airflow concentration and facilitating the flow of air from the housing air inlet 35 into the motor air inlet 211, thereby improving airflow efficiency and motor heat dissipation performance.

[0209] In some embodiments, as shown in Figures 14 to 16, the motor connecting part 92 is sleeved with the outer wall of the motor; a limiting groove 39 is provided on the inner wall of the main housing 3, and the housing connecting part 91 is engaged with the inner wall of the main housing 3 through the limiting groove 39, thereby engaging and assembling the barrier 9 with the main housing 3. For example, the limiting groove 39 may include an annular groove, and annular ribs may be provided on the inner wall of the main housing 3, with at least two annular ribs spaced apart along the extension direction of the power output shaft 214 of the motor, forming an annular groove between two adjacent annular ribs; the housing connecting part 91 is at least partially engaged in the annular groove. In some embodiments, the main housing 3 may also have a engaging protrusion on its inner wall, and the housing connecting part 91 is correspondingly provided with a groove, with the engaging protrusion engaging with the groove to engage the housing connecting part 91 with the inner wall of the main housing 3. In this way, the barrier 9 can be quickly and detachably connected to the main housing 3 and the motor, making installation and disassembly convenient, facilitating maintenance, and helping to extend the service life of the motor.

[0210] In some embodiments, as shown in FIG14, the barrier 9 includes a corrugated structure 94 extending between the main housing 3 and the outer wall 215 of the motor, the corrugated structure 94 being configured to buffer vibrations transmitted from the motor to the main housing 3 at least in the radial direction of the power output shaft 214 of the motor.

[0211] The corrugated structure 94 is a structure with an arc-shaped or wavy cross-sectional shape along the radial direction of the power output shaft 214. The wavy cross-sectional shape of the corrugated structure 94 along the radial direction of the power output shaft 214 means that the corrugated structure 94 includes at least one crest portion 941 and at least one trough portion 942, with the crest portion 941 and the trough portion 942 connected. The cross-sectional shapes of the crest portion 941 and the trough portion 942 along the radial direction of the power output shaft 214 can include, but are not limited to, arc-shaped, triangular broken lines, square broken lines, or trapezoidal broken lines. The corrugated structure 94 can be configured to extend along the radial direction of the power output shaft 214, forming a single-layer corrugated structure 94; alternatively, the extension direction of the corrugated structure 94 can intersect with the radial direction of the power output shaft 214, causing the corrugated structure 94 to fold in the radial direction of the power output shaft 214, thereby forming a double-layer corrugated structure 94. In some embodiments, the corrugated structure 94 can be at least a portion of the intermediate extension portion 93.

[0212] By setting a corrugated structure 94 to buffer the vibration transmitted from the motor to the main unit housing 3, the vibration transmitted from the motor to the main unit housing 3 is further reduced, the vibration felt by the user is reduced, and the user experience is improved.

[0213] Furthermore, when the motor vibrates or is displaced by external force, the barrier 9 will be stretched. By setting the corrugated structure 94, the corrugated structure 94 can deform, which can increase the stretchability of the barrier 9, prevent the barrier 9 from being damaged by excessive stretching, and extend its service life.

[0214] In some embodiments, as shown in FIG16, the barrier 9 includes an inner barrier wall 95 and an outer barrier wall 96 disposed opposite to each other. One end of the inner barrier wall 95 and the outer barrier wall 96 are connected, forming a cavity between the inner barrier wall 95 and the outer barrier wall 96. The other end of the inner barrier wall 95 is connected to a motor, and the other end of the outer barrier wall 96 is connected to the main housing 3.

[0215] The cross-sectional shape of the inner barrier wall 95 along the radial direction of the power output shaft 214 may include, but is not limited to, a straight line, an arc, or a wave shape. The cross-sectional shape of the outer barrier wall 96 along the radial direction of the power output shaft 214 may include, but is not limited to, a straight line, an arc, or a wave shape.

[0216] Thus, the barrier 9 forms a double-layer structure, allowing it to withstand greater deformation and have a larger stretchability, further preventing damage from excessive stretching. Furthermore, the double-layer structure of the barrier 9 improves airflow concentration, better guiding airflow into the motor inlet 211, thereby increasing airflow efficiency and improving the motor's heat dissipation performance.

[0217] In some embodiments, as shown in Figures 1, 3 to 5, in the height extension direction H, the end of the main housing 3 with the front handle 311 is considered upper, and the end of the main housing 3 away from the front handle 311 is considered lower. In the height extension direction H, the motor air inlet 211 is located above the motor air outlet 212, and the housing air inlet 35 is located above the housing air outlet 36.

[0218] It is understandable that when the pruning machine 100 is in use, the airflow on the lower side of the pruning machine 100 is more likely to carry foreign objects. By setting the motor air inlet 211 above the motor air outlet 212, and the housing air inlet 35 above the housing air outlet 36, when the pruning machine 100 is in use, air can enter from the upper side and exit from the lower side. This reduces the flow of unclean air into the motor, making the incoming airflow cleaner, thereby reducing the entry of external impurities into the motor. This is beneficial to improving motor reliability, extending motor life, and enhancing the user experience.

[0219] In some embodiments, the extension direction of the power output shaft 214 of the motor 20 is parallel to the height extension direction H, and the motor air inlet 211 is disposed at the upper end of the motor. In some embodiments, at least two housing air inlets 35 may be provided, and at least two housing air inlets 35 are disposed on opposite sides of the main housing 3 along the width extension direction W. At least two housing air outlets 36 may also be provided, and at least two housing air inlets and outlets 36 are disposed on opposite sides of the main housing 3 along the width extension direction W.

[0220] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0221] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pruning machine extending along three orthogonal spatial directions: a length extension direction L, a width extension direction W, and a height extension direction H; characterized in that, The pruning machine includes: The main unit housing has a receiving portion, and the main unit housing also includes a front handle and a rear handle for the user to hold; A blade assembly extends along the length extension direction L, the blade assembly including a first blade and a second blade that perform a cutting function; A motor is disposed within the receiving portion, and the motor drives the first blade and the second blade; The transmission module transmits the power of the motor to the first blade and the second blade; When the pruning machine is operating normally under no-load conditions, the sum of the maximum reciprocating speeds of the first and second blades is greater than 4400 sppm and less than or equal to 6000 sppm, and the vibration acceleration of the front handle is not greater than 4 m / s². 2 And / or the vibration acceleration of the rear handle is not greater than 2.5 m / s². 2 .

2. The pruning machine according to claim 1, characterized in that, Both the first blade and the second blade include a body portion extending along the length extension direction L, and a plurality of blade teeth for cutting vegetation. The blade teeth have a front cutting edge and a rear cutting edge formed at the front and rear of the front cutting edge along the length extension direction L, respectively. On the same blade, a maximum distance is formed between the front cutting edges of two adjacent blade teeth in the length extension direction L. The maximum distance is defined as the blade tooth pitch P1. In the length extension direction L, the effective cutting length L0 of the first blade and the second blade is configured to be not less than 500 mm and not more than 1000 mm, the thickness T of the first blade and the second blade is configured to be greater than 1.5 mm and less than or equal to 3 mm, and the ratio of the tooth pitch P1 to the sum of the weights of the first blade and the second blade is not less than 0.024 mm / kg and not more than 0.084 mm / kg.

3. The pruning machine according to any one of claims 1 to 2, characterized in that, In the length extension direction L, the effective cutting length L0 of both the first and second blades is configured to be not less than 500 mm and not more than 1000 mm; the thickness of both the first and second blades is configured to be greater than 1.5 mm and less than or equal to 3 mm; and the total number of cutting teeth of the first and second blades is in the range of 52 to 166. The ratio of the effective cutting length L0 to the weight of the bare pruning machine is greater than 110 mm / kg and less than 385 mm / kg.

4. The pruning machine according to any one of claims 1 to 3, characterized in that, The pruning machine also includes an elastic damping component that supports the transmission module suspended in the main housing; One end of the elastic damping member is connected to the transmission housing, and the other end of the elastic damping member is connected to the main housing. The elastic damping member includes a first elastic damping member and a second elastic damping member. The first elastic damping member and the second elastic damping member are respectively arranged on both sides of the transmission module in the width extension direction W, with the elastic stiffness of the first elastic damping member and the second elastic damping member being configured to be not less than 5N / mm and not greater than 15N / mm, so as to suppress the outward transmission of vibration generated by the transmission mechanism.

5. The pruning machine according to any one of claims 1 to 4, characterized in that, The pruning machine also includes at least one elastic support member, which is disposed between the main housing and the transmission housing in the width extension direction W. In the length extension direction L, the elastic damper is closer to the front handle than the elastic support, and the elastic support is closer to the rear handle than the elastic damper. The elastic support is configured to at least suppress the transmission of vibrations generated by the transmission mechanism to the main housing.

6. The pruning machine according to claim 4, characterized in that, The elastic damper and the elastic support are configured as different types of elastic elements. The elastic damper is configured as a spring that can be compressed or stretched, and the elastic support is configured as an elastic rubber component.

7. The pruning machine according to any one of claims 1 to 6, characterized in that, The transmission module is suspended and supported on the main housing. The pruning machine also includes a first support structure, which is at least used to limit the movement of the transmission housing in the height extension direction H.

8. The pruning machine according to claim 7, characterized in that, The first support structure includes a limiting mounting hole provided on one of the main housing and the transmission housing, and a support beam provided on the other of the main housing and the transmission housing. The support beam passes through the limiting mounting hole, and the limiting mounting hole at least limits the movement of the support beam in the height extension direction H.

9. The pruning machine according to claim 8, characterized in that, The distance between the outer wall of the support beam and the inner wall of the limiting mounting hole does not exceed 6mm.

10. The pruning machine according to any one of claims 7 to 9, characterized in that, The first blade and the second blade have contact planes that contact each other, the first support structure has a first central axis X1, and the elastic damping member has a second central axis X2; In the length extension direction L, the distance between the projections of the first central axis X1 and the second central axis X2 onto the contact plane does not exceed 100 mm.

11. The pruning machine according to any one of claims 7 to 10, characterized in that, The transmission housing includes a leading edge near the blade assembly and a trailing edge away from the blade assembly; The pruning machine further includes at least a second support structure for limiting the movement of the transmission housing in the height extension direction H, wherein one of the first support structure and the second support structure is disposed near the front edge of the transmission housing and the other is disposed near the rear edge of the transmission housing.

12. The pruning machine according to any one of claims 1 to 11, characterized in that, The pruning machine also includes an elastic damping component that supports the transmission module suspended in the main housing. One end of the elastic damping component is connected to the transmission housing, and the other end of the elastic damping component is connected to the main housing. The pruning machine also includes a first support structure, which is at least used to limit the movement of the transmission housing in the height extension direction H.

13. A pruning machine extends along three orthogonal spatial directions: a length extension direction L, a width extension direction W, and a height extension direction H; characterized in that, The pruning machine includes: The main unit casing has a receiving section; A blade assembly extends along the length extension direction L, the blade assembly including a first blade and a second blade that perform a cutting function; A motor is disposed within the receiving portion, and the motor drives the first blade and the second blade to reciprocate along the length extension direction L; A transmission module transmits power from the motor to the first blade and the second blade. The transmission module includes a transmission mechanism and a transmission housing that houses at least a portion of the transmission mechanism. The transmission mechanism includes: Deceleration structure; The first drive unit is powered by the reduction structure and cooperates with the first blade to transmit the power output by the reduction structure to the first blade. The second drive unit is powered by the reduction structure and cooperates with the second blade to transmit the power output by the reduction structure to the second blade. The transmission module is suspended and supported on the main housing.

14. The pruning machine according to claim 13, characterized in that, In the width extension direction W, there is an opening between the main housing and the transmission housing that faces downward along the height extension direction H and is in fluid communication with the outside, at least a portion of the opening being configured to be visible when viewed from bottom to top in the height extension direction H.

15. The pruning machine according to any one of claims 13 to 14, characterized in that, Along the width extension direction W, a first damping distance W1 and a second damping distance W2 are formed between the main housing and the transmission housing, and the range of both the first damping distance W1 and the second damping distance W2 is configured to be less than or equal to 10 mm.

16. The pruning machine according to any one of claims 13 to 15, characterized in that, The pruning machine also includes an elastic damping component that supports the transmission module suspended in the main housing. One end of the elastic damping component is connected to the transmission housing, and the other end of the elastic damping component is connected to the main housing. The pruning machine also includes a first support structure, which is at least used to limit the movement of the transmission housing in the height extension direction H.

17. The pruning machine according to claim 16, characterized in that, The elastic damping component includes a first elastic damping component and a second elastic damping component, which are respectively disposed on the left and right sides of the transmission module in the width extension direction W.

18. The pruning machine according to any one of claims 16-17, characterized in that, The first support structure includes a limiting mounting hole provided on one of the main housing and the transmission housing, and a support beam provided on the other of the main housing and the transmission housing. The support beam passes through the limiting mounting hole, and the limiting mounting hole at least limits the movement of the support beam in the height extension direction H.

19. The pruning machine according to claim 18, characterized in that, The outer wall of the support beam and the inner wall of the limiting mounting hole are spaced apart by a first gap in the height direction H, and the outer wall of the support beam and the inner wall of the limiting mounting hole are spaced apart by a second gap in the length extension direction L. Both the first gap and the second gap are configured to be less than 6mm.

20. The pruning machine according to any one of claims 16 to 19, characterized in that, The first blade and the second blade have contact planes that contact each other, the first support structure has a first central axis X1, and the elastic damping member has a second central axis X2; In the length extension direction L, the distance between the projections of the first central axis X1 and the second central axis X2 onto the contact plane does not exceed 50 mm.

21. The pruning machine according to any one of claims 16 to 20, characterized in that, The pruning machine also includes at least one elastic support member disposed between the main housing and the transmission housing. In the length extension direction L, the elastic damping member is closer to the front handle relative to the elastic support member, and the elastic support member is closer to the rear handle relative to the elastic damping member. The elastic support member at least suppresses the transmission of vibrations generated by the transmission mechanism to the main housing.

22. The pruning machine according to any one of claims 16 to 21, characterized in that, The transmission housing includes a front edge near the blade assembly and a rear edge away from the blade assembly. The pruning machine also includes at least a second support structure for supporting and limiting the movement of the transmission housing in the width extension direction W. One of the first support structure and the second support structure is disposed near the front edge of the transmission housing, and the other is disposed near the rear edge of the transmission housing.

23. The pruning machine according to claim 21, characterized in that, The elastic damper and the elastic support are configured as elastic elements of different forms; and / or The elastic damping element is configured as a spring capable of compression or extension, and the at least one elastic support element is configured as an elastic rubber element.

24. The pruning machine according to any one of claims 13 to 23, characterized in that, Viewed from directly below the motor, at least a portion of the bottom area of ​​the transmission housing is exposed outside the main housing.

25. A pruning machine, comprising a main housing, a blade assembly driven by a motor, and a transmission housing housing a transmission mechanism, wherein the main housing is provided with a handle for a user to hold, characterized in that, The pruning machine also includes the vibration damping module, which includes at least two elastic damping elements configured to connect between the transmission housing and the main housing to provide elastic support. The pruning machine also includes a first support structure. The limiting structure includes a support portion disposed on one of the transmission housing and the main housing, and a limiting portion disposed on the other. The support portion and the limiting portion are configured to be movably clearance-fitted to limit the range of movement of the transmission housing relative to the main housing in the height extension direction H. The vibration damping module and the first support structure together constitute a vibration suppression system, which is configured to suppress the vibration acceleration transmitted to the handle when the pruning machine is running in an unloaded state with the sum of the maximum reciprocating speeds of the blade assembly being greater than 4400 spm.

26. The pruning machine according to claim 25, characterized in that, The limiting part is configured as a limiting mounting hole provided on one of the main housing and the transmission housing, and the supporting part is configured as a supporting beam provided on the other of the main housing and the transmission housing. The supporting beam passes through the limiting mounting hole, and the limiting mounting hole at least limits the movement of the supporting beam in the height extension direction H.

27. The pruning machine according to any one of claims 25 to 26, characterized in that, The first support structure further includes a vibration isolation sleeve fitted between the support beam and the limiting mounting hole; the vibration isolation sleeve is at least partially made of an elastic or flexible material; and / or The vibration isolation sleeve is configured such that the distance by which the support beam can move relative to the limiting mounting hole in the length extension direction L is greater than the distance by which the support beam can move relative to the limiting mounting hole in the height extension direction H.

28. The pruning machine according to any one of claims 25 to 27, characterized in that, The distance between the outer wall of the support beam and the inner wall of the limiting mounting hole does not exceed 6mm.

29. The pruning machine according to any one of claims 25 to 28, characterized in that, The blade assembly includes a first blade and a second blade that perform a cutting function. The first blade and the second blade have contact planes that contact each other. The first support structure has a first central axis X1, and the elastic damping member has a second central axis X2. In the length extension direction L, the distance between the projections of the first central axis X1 and the second central axis X2 onto the contact plane does not exceed 100 mm.

30. The pruning machine according to any one of claims 25 to 29, characterized in that, The blade assembly includes a first blade and a second blade that perform the cutting function. Both the first blade and the second blade include a body portion extending along the length extension direction L and a plurality of blade teeth for cutting vegetation. The blade teeth have a front cutting edge and a rear cutting edge formed at the front and rear of the front cutting edge along the length extension direction L, respectively. On the same blade, a maximum distance is formed between the front cutting edges of two adjacent blade teeth in the length extension direction L. The maximum distance is defined as the blade tooth pitch P1. In the length extension direction L, the effective cutting length L0 of the first blade and the second blade is configured to be not less than 500 mm and not more than 1000 mm, the thickness T of the first blade and the second blade is configured to be greater than 1.5 mm and less than or equal to 3 mm, and the ratio of the tooth pitch P1 to the sum of the weights of the first blade and the second blade is not less than 0.024 mm / kg and not more than 0.084 mm / kg.

31. The pruning machine according to any one of claims 25 to 30, characterized in that, In the length extension direction L, the effective cutting length L0 of both the first and second blades is configured to be not less than 500 mm and not more than 1000 mm; the thickness of both the first and second blades is configured to be greater than 1.5 mm and less than or equal to 3 mm; and the total number of cutting teeth of the first and second blades is in the range of 52 to 166. The ratio of the effective cutting length L0 to the weight of the bare pruning machine is greater than 110 mm / kg and less than 385 mm / kg.

32. The pruning machine according to any one of claims 25 to 31, characterized in that, The at least two elastic damping components include a first elastic damping component and a second elastic damping component. The elastic stiffness of the first elastic damping component and the second elastic damping component are both configured to be not less than 5 N / mm and not greater than 15 N / mm, and are respectively disposed on both sides of the transmission module in the width extension direction W, so as to suppress the outward transmission of vibration generated by the transmission mechanism.

33. The pruning machine according to any one of claims 25 to 32, characterized in that, The vibration damping module also includes at least one elastic support member, which is disposed between the main housing and the transmission housing in the width extension direction W. In the length extension direction L, the elastic damper is closer to the front handle than the elastic support, and the elastic support is closer to the rear handle than the elastic damper. The elastic support is configured to at least suppress the transmission of vibrations generated by the transmission mechanism to the main housing.

34. The pruning machine according to any one of claims 25 to 33, characterized in that, The elastic damper and the elastic support are configured as different types of elastic elements. The elastic damper is configured as a spring that can be compressed or stretched, and the elastic support is configured as an elastic rubber component.

35. The pruning machine according to any one of claims 25 to 34, characterized in that, The vibration damping module and the first support structure together constitute a vibration suppression system, which is configured to suppress the vibration acceleration transmitted to the handle when the pruning machine is running in an unloaded state with the sum of the maximum reciprocating speeds of the blade assembly being greater than 4400 sppm and less than or equal to 6000 sppm.

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