Pruner

Abstract

This application provides a pruning machine, including a main housing housing containing a motor, a transmission housing housing containing a transmission mechanism, and a blade assembly. The transmission structure includes a reduction structure, a first eccentric wheel portion, and a second eccentric wheel portion. The first eccentric wheel portion and the second eccentric wheel portion are drivenly connected to the blade assembly. In the width extension direction W, a first vibration damping gap is provided between the main housing housing and the transmission housing. The first vibration damping gap has an opening that opens downward along the height extension direction H and is in fluid communication with the outside. The transmission housing includes a first part housed within the main housing housing and a second part that houses at least a portion of the reduction structure. In the height extension direction H, the second part protrudes downward from the first part and is exposed outside the opening. By suspending a portion of the transmission housing below the main housing housing and exposing it outside the opening, the pruning machine simultaneously has a good vibration damping effect and a lightweight visual effect, and the opening is not prone to branch jamming, resulting in a low failure rate.

Description

Technical Field

[0001] This application, and the embodiments thereof, pertain to the field of power tool technology, and particularly to a pruning machine. Background Technology

[0002] In existing pruning machines, a main housing is included, with a front handle and a rear handle for the user to grip at the front and rear ends along the longitudinal direction of the main housing, respectively. A motor is built into the main housing, and a transmission housing is connected to and enclosed or partially enclosed by the main housing. A blade assembly is fixed to the end of the transmission housing and extends forward along the longitudinal direction of the main housing. The transmission housing houses a transmission mechanism for converting the motor's output into reciprocating motion to drive the blade assembly; this transmission mechanism is driven between the blade assembly and the motor. Furthermore, the front handle, rear handle, and main housing are fastened together with screws or bolts or are integrally molded to prevent loosening. In actual use, the vibrations from the blade assembly contacting the pruning object, the shearing, the transmission mechanism within the transmission housing, and the motor are all directly transmitted through the main housing to the front and rear handles, causing a tingling or vibrating sensation in the user's hands and resulting in a poor grip experience.

[0003] Therefore, some existing pruning machines incorporate vibration damping devices between the main housing and the transmission housing to reduce vibration transmission between them. Simultaneously, a damping gap needs to be reserved between the transmission housing and the main housing for these devices. Since the main housing and transmission housing are enclosed or semi-enclosed, the height and width of the main housing are already greater than those of the transmission housing. Adding a damping gap further increases the height and / or width of the main housing, resulting in a bulky and visually unappealing appearance.

[0004] Meanwhile, since the transmission housing is surrounded or semi-surrounded within the main housing, the plane where the aforementioned vibration damping gap opening is located is flush with or lower than the bottom surface of the transmission housing. When the user holds the pruning machine with both hands and moves it back and forth in a certain plane to prune and cut, the branches and shrubs located in that plane will be embedded or inserted into the vibration damping gap, resulting in branch jamming and affecting the normal use of the pruning machine. Summary of the Invention

[0005] The purpose of this disclosure is to provide a pruning machine that aims to reduce the size of the main unit housing, making the overall machine more compact, while reducing the occurrence of branch jamming and lowering the failure rate of the pruning machine.

[0006] To achieve the above objectives, the present disclosure provides the following technical solutions:

[0007] 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. The pruning machine includes:

[0008] The blade assembly includes a first blade and a second blade that perform a cutting function when in relative motion;

[0009] A motor is used to drive relative motion between the first blade and the second blade.

[0010] The main housing contains the motor.

[0011] The transmission mechanism, driven by the motor, transmits the driving force of the motor to the blade assembly. The transmission mechanism includes a reduction structure and a first eccentric wheel and a second eccentric wheel arranged sequentially along the height extension direction H. The first eccentric wheel and the second eccentric wheel can drive the first blade and the second blade to generate relative motion.

[0012] A transmission housing for accommodating the transmission mechanism;

[0013] Front and rear handles for the operator to grip;

[0014] In the width extension direction W, a first damping gap is provided between the main housing and the transmission housing, the first damping gap having an opening that faces downward along the height extension direction H and is in fluid communication with the outside;

[0015] The transmission housing includes a first portion housed inside the main housing and a second portion that houses at least part of the deceleration structure. In the height extension direction H, the second portion protrudes downward and is exposed outside the opening.

[0016] In one embodiment, at least a portion of the opening is configured to be visible when viewed from bottom to top in the height extension direction H.

[0017] In one embodiment, the plane on which the contact surfaces of the first blade and the second blade are located during relative motion is the cutting plane, and the minimum distance between the plane on which the opening is located and the cutting plane in the height extension direction H is not less than 10 mm.

[0018] In one embodiment, the distance h1 between the plane containing the opening and the cutting plane in the height extension direction H is 11mm to 16mm.

[0019] In one embodiment, the shortest distance between the plane containing the opening and the lowest surface of the transmission housing in the height extension direction H is greater than or equal to 31 mm.

[0020] In one embodiment, the reduction structure includes a first-stage gear set poweredly connected to the motor to reduce the motor speed, and the second part includes a first housing that at least partially houses the first-stage gear set and a second housing that houses the first eccentric wheel portion and the second eccentric wheel portion, the first housing being configured to be suspended directly below the motor without obstructing the opening.

[0021] In one embodiment, the second housing and the first housing are arranged one behind the other in the length extension direction L. The deceleration structure further includes a second gear set to reduce the speed of the motor. The first gear set transmits power between the motor and the second gear set. The second gear set transmits power between the first gear set and the blade assembly. The first gear set includes a first driving gear and a first driven gear that mesh with each other. The number of teeth of the first driving gear is less than the number of teeth of the first driven gear. The first driving gear is at least partially housed in the first housing. The second gear set is housed in the second housing.

[0022] In one embodiment, the first drive gear is located directly below the motor and is driven to connect to the output shaft of the motor.

[0023] In one embodiment, the second housing and the first housing are arranged one behind the other in the length extension direction L. The deceleration structure further includes a second gear set to reduce the speed of the motor. The first gear set transmits power between the motor and the second gear set. The second gear set transmits power between the first gear set and the blade assembly. The first gear set includes a first planetary gear set. At least a portion of the first planetary gear set is housed in the first housing. The second gear set is housed in the second housing.

[0024] In one embodiment, the first planetary gear set is located directly below the motor. The first planetary gear set includes a first sun gear, at least two first planet gears, a first planet carrier, and a first ring gear. The first sun gear is located inside the first ring gear and the two are coaxially arranged. At least two first planet gears are externally meshed between the first sun gear and the first ring gear along the circumferential direction of the first sun gear. The output shaft of the motor is drivenly connected to the first sun gear. A first-stage reduction output shaft is provided on the first ring gear or the first planet carrier. The second gear set realizes the power transmission between the first-stage reduction output shaft and the blade assembly.

[0025] In one embodiment, the main unit housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle;

[0026] The first blade and the second blade define a cutting plane, and the projection of the connecting housing onto the cutting plane is always within the coverage area of ​​the projection of the second housing onto the cutting plane.

[0027] In one embodiment, the second gear set includes a second driving gear and a second driven gear that mesh with each other. The number of teeth of the second driving gear is less than the number of teeth of the second driven gear. The first eccentric wheel portion and the second eccentric wheel portion are drivenly connected to the second driven gear. The maximum distance between the second driven gear and the inner sidewall of the second housing in the width extension direction W is 1mm to 2mm.

[0028] In one embodiment, the second gear set includes a second planetary gear set, which includes a second sun gear, at least two second planet gears, a second planet carrier, and a second ring gear. The second sun gear is located inside the second ring gear and the two are coaxially arranged. At least two second planet gears are externally meshed between the second sun gear and the second ring gear along the circumferential direction of the second sun gear. The first eccentric wheel portion and the second eccentric wheel portion are drivenly connected to the second ring gear or the second planet carrier.

[0029] In one embodiment, the maximum width of the first housing in the width extension direction W is W1, the maximum width of the outer edge wall of the opening in the width extension direction W is W2, and the ratio of W1 to W2 is not greater than 0.9.

[0030] In one embodiment, the spacing d1 of the first damping gap in the width extension direction W ranges from 3 mm to 5 mm.

[0031] In one embodiment, the width W1 of the first housing in the width extension direction W ranges from 30 mm to 76 mm, and the width W2 of the outer edge wall of the opening in the width extension direction W ranges from 40 mm to 86 mm.

[0032] In one embodiment, the main housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle; in the height extension direction H, the connecting housing and the second housing are separated by a second damping gap.

[0033] In one embodiment, the spacing h2 of the second damping gap in the height extension direction H ranges from 3 mm to 5 mm.

[0034] In one embodiment, the height H1 of the motor housing ranges from 85 mm in the height extension direction H.

[0035] ~120mm, and the height H2 of the connecting housing ranges from 50mm to 55mm.

[0036] In one embodiment, the main unit housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle;

[0037] The second housing has a maximum width W3 in the width extension direction W, and the connecting housing has a maximum width W4 in the width extension direction W. The maximum width W4 is less than or equal to the maximum width W3, and the maximum width W3 is less than or equal to 75 mm.

[0038] In one embodiment, the width W4 of the connecting housing in the width extension direction W ranges from 75 mm to 82 mm.

[0039] In one embodiment, the pruning machine further includes a safety guard plate disposed on the front side of the front handle and an elastic support member supporting the transmission housing suspended below the main housing. Within the range of the first damping gap and the second damping gap, the elastic support member is used to prevent the transmission housing from contacting the main housing in the width extension direction W and the height extension direction H.

[0040] The bottom of the main housing, the safety guard plate, or the front handle has an upwardly recessed receiving chamber. One end of the elastic support is connected to the transmission housing, and the other end of the elastic support is connected to the main housing, the safety guard plate, or the front handle. The elastic support includes a first elastic support and a second elastic support. The first elastic support and the second elastic support are located in the receiving chamber, and the first elastic support and the second elastic support are respectively disposed on both sides of the transmission housing in the width extension direction W.

[0041] In one embodiment, the pruning machine further includes a baffle plate disposed below the elastic support member in the height extension direction H, the baffle plate blocking the receiving chamber upward.

[0042] In one embodiment, the elastic support further includes a third elastic support and a fourth elastic support, which are located in the first damping gap and are respectively disposed on both sides of the first part of the transmission housing located within the main housing in the width extension direction W.

[0043] In one embodiment, the first and second elastic supports located in the receiving chamber and the third and fourth elastic supports located in the first damping gap are elastic elements of different forms.

[0044] In one embodiment, the first elastic support and the second elastic support are configured as springs.

[0045] In one embodiment, the third elastic support and the fourth elastic support are configured as rubber components.

[0046] The purpose of this disclosure is to provide a pruning machine that addresses how to reduce the size of the main unit housing, making the main unit housing appear lighter and more compact.

[0047] To achieve the above objectives, the present disclosure provides the following technical solutions:

[0048] 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. The pruning machine includes:

[0049] The blade assembly includes a first blade and a second blade that perform a cutting function when in relative motion;

[0050] A motor is used to drive relative motion between the first blade and the second blade.

[0051] The main housing, within which the motor and the control unit are housed;

[0052] The transmission mechanism, driven by the motor, transmits the driving force of the motor to the blade assembly. The transmission mechanism includes a reduction structure and a first eccentric wheel and a second eccentric wheel arranged sequentially along the height extension direction H. The first eccentric wheel and the second eccentric wheel can drive the first blade and the second blade to generate relative motion.

[0053] A transmission housing for accommodating the transmission mechanism;

[0054] Front and rear handles for the operator to grip;

[0055] The main unit housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle;

[0056] The transmission housing includes an eccentric housing that houses the first eccentric wheel portion and the second eccentric wheel portion; in the height extension direction H, the eccentric housing is located below the connecting housing, and the eccentric housing protrudes downward and is exposed outside the connecting housing.

[0057] In one embodiment, the plane where the contact surfaces of the first blade and the second blade are located during their relative motion is the cutting plane, and the projection of the connecting housing onto the cutting plane is always within the coverage area of ​​the projection of the eccentric housing onto the cutting plane.

[0058] In one embodiment, the eccentric housing has a maximum width W3 in the width extension direction W, the connecting housing has a maximum width W4 in the width extension direction W, the maximum width W4 is less than or equal to the maximum width W3, and the maximum width W3 is less than or equal to 75 mm.

[0059] In one embodiment, the width W4 of the connecting housing in the width extension direction W ranges from 75 mm to 82 mm.

[0060] In one embodiment, the connecting housing and the eccentric housing are separated by a second damping gap in the height extension direction H.

[0061] In one embodiment, the spacing h2 of the second damping gap in the height extension direction H ranges from 3 mm to 5 mm.

[0062] In one embodiment, the reduction structure includes a first-stage gear set poweredly connected to the motor to reduce the motor speed, and the transmission housing includes a first portion housed within the main housing and a second portion housing at least a portion of the reduction structure. The second portion further includes a reduction housing housing housing at least a portion of the first-stage gear set, and the reduction housing housing protrudes downward and is exposed outside the main housing.

[0063] In one embodiment, the height H1 of the motor housing ranges from 85 mm in the height extension direction H.

[0064] ~120mm, and the height H2 of the connecting housing ranges from 50mm to 55mm.

[0065] In one embodiment, the eccentric housing and the reduction housing are arranged one after the other in the length extension direction L. The reduction structure further includes a second gear set to reduce the speed of the motor. The first-stage gear set transmits power between the motor and the second gear set. The second gear set transmits power between the first-stage gear set and the blade assembly. The first-stage gear set includes a first driving gear and a first driven gear that mesh with each other. The number of teeth of the first driving gear is less than the number of teeth of the first driven gear. At least a portion of the first driving gear is housed in the reduction housing. The second gear set is housed in the eccentric housing.

[0066] In one embodiment, the first drive gear is located directly below the motor and is driven to connect to the output shaft of the motor.

[0067] In one embodiment, the eccentric housing and the reduction housing are arranged one after the other in the length extension direction L. The reduction structure further includes a second gear set to reduce the speed of the motor. The first-stage gear set transmits power between the motor and the second gear set. The second gear set transmits power between the first-stage gear set and the blade assembly. The first-stage gear set includes a first planetary gear set. At least a portion of the first planetary gear set is housed in the reduction housing. The second gear set is housed in the eccentric housing.

[0068] In one embodiment, the first planetary gear set is located directly below the motor. The first planetary gear set includes a first sun gear, at least two first planet gears, a first planet carrier, and a first ring gear. The first sun gear is located inside the first ring gear and the two are coaxially arranged. At least two first planet gears are externally meshed between the first sun gear and the first ring gear along the circumferential direction of the first sun gear. The output shaft of the motor is drivenly connected to the first sun gear. A first-stage reduction output shaft is provided on the first ring gear or the first planet carrier. The second gear set realizes the power transmission between the first-stage reduction output shaft and the blade assembly.

[0069] In one embodiment, the width W1 of the deceleration housing in the width extension direction W ranges from 30 mm to 76 mm.

[0070] In one embodiment, the second gear set includes a second driving gear and a second driven gear that mesh with each other. The number of teeth of the second driving gear is less than the number of teeth of the second driven gear. The first eccentric wheel portion and the second eccentric wheel portion are drivenly connected to the second driven gear. The maximum distance between the second driven gear and the inner sidewall of the eccentric housing in the width extension direction W is 1mm to 2mm.

[0071] In one embodiment, the second gear set includes a second planetary gear set, which includes a second sun gear, at least two second planet gears, a second planet carrier, and a second ring gear. The second sun gear is located inside the second ring gear and the two are coaxially arranged. At least two second planet gears are externally meshed between the second sun gear and the second ring gear along the circumferential direction of the second sun gear. The first eccentric wheel portion and the second eccentric wheel portion are drivenly connected to the second ring gear or the second planet carrier.

[0072] The purpose of this disclosure is to provide a pruning machine that aims to reduce the size of the main unit housing, making the main unit housing appear lighter and more compact, while reducing the occurrence of branch jamming and lowering the failure rate of the pruning machine.

[0073] To achieve the above objectives, the present disclosure provides the following technical solutions:

[0074] 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. The pruning machine includes:

[0075] The blade assembly includes a first blade and a second blade that perform a cutting function when in relative motion;

[0076] A motor is used to drive relative motion between the first blade and the second blade.

[0077] The main housing contains the motor.

[0078] The transmission mechanism, driven by the motor, transmits the driving force of the motor to the blade assembly. The transmission mechanism includes a reduction structure and a first eccentric wheel and a second eccentric wheel arranged sequentially along the height extension direction H. The first eccentric wheel and the second eccentric wheel can drive the first blade and the second blade to generate relative motion.

[0079] A transmission housing for accommodating the transmission mechanism;

[0080] Front and rear handles for the operator to grip;

[0081] A first damping gap is provided between the main housing and the transmission housing in the width extension direction W. The first damping gap has an opening that faces downward along the height extension direction H and is in fluid communication with the outside.

[0082] The transmission housing includes an eccentric housing that houses the first eccentric wheel portion and the second eccentric wheel portion; in the height extension direction H, the eccentric housing protrudes downward and is exposed outside the opening.

[0083] In one embodiment, the plane on which the contact surfaces of the first blade and the second blade are located during relative motion is the cutting plane, and the minimum distance between the plane on which the opening is located and the cutting plane in the height extension direction H is not less than 10 mm.

[0084] In one embodiment, the distance h1 between the plane containing the opening and the cutting plane in the height extension direction H is 11mm to 16mm.

[0085] In one embodiment, the shortest distance between the plane containing the opening and the lowest surface of the transmission housing in the height extension direction H is greater than or equal to 31 mm.

[0086] In one embodiment, the transmission housing further includes a first portion housed within the main housing, the reduction structure includes at least one set of planetary gears that transmit the power of the motor to the first eccentric wheel portion and the second eccentric wheel portion, the first portion at least houses a portion of the planetary gear set, and the eccentric housing is suspended downwardly directly below the motor.

[0087] In one embodiment, the transmission housing further includes a first portion housed within the main housing and a second portion housing at least a portion of the reduction structure, the reduction structure including at least one set of planetary gears and at least one set of external meshing gears, the second portion including a reduction housing housing housing at least a portion of the planetary gears or a portion of the external meshing gears and the eccentric housing, the reduction housing protruding downwards and suspended directly below the motor without obstructing the opening.

[0088] In one embodiment, the spacing d1 of the first damping gap in the width extension direction W ranges from 3 mm to 5 mm.

[0089] In one embodiment, the main housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle; in the height extension direction H, the connecting housing and the eccentric housing are separated by a second damping gap.

[0090] In one embodiment, the spacing h2 of the second damping gap in the height extension direction H ranges from 3 mm to 5 mm.

[0091] In one embodiment, the height H1 of the motor housing ranges from 85 mm in the height extension direction H.

[0092] ~120mm, and the height H2 of the connecting housing ranges from 50mm to 55mm.

[0093] In one embodiment, the main unit housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle;

[0094] The eccentric housing has a maximum width W3 in the width extension direction W, and the connecting housing has a maximum width W4 in the width extension direction W. The maximum width W4 is less than or equal to the maximum width W3, and the maximum width W3 is less than or equal to 75 mm.

[0095] In one embodiment, the width W4 of the connecting housing in the width extension direction W ranges from 75 mm to 82 mm.

[0096] In one embodiment, the pruning machine further includes a safety guard plate disposed on the front side of the front handle and an elastic support member supporting the transmission housing suspended below the main housing. Within the range of the first damping gap and the second damping gap, the elastic support member is used to prevent the transmission housing from contacting the main housing in the width extension direction W and the height extension direction H.

[0097] The bottom of the main housing, the safety guard plate, or the front handle has an upwardly recessed receiving chamber. One end of the elastic support is connected to the transmission housing, and the other end of the elastic support is connected to the main housing, the safety guard plate, or the front handle. The elastic support includes a first elastic support and a second elastic support. The first elastic support and the second elastic support are located in the receiving chamber, and the first elastic support and the second elastic support are respectively disposed on both sides of the transmission housing in the width extension direction W.

[0098] In one embodiment, the pruning machine further includes a baffle plate disposed below the elastic support member in the height extension direction H, the baffle plate blocking the receiving chamber upward.

[0099] In one embodiment, the elastic support further includes a third elastic support and a fourth elastic support, which are located in the first damping gap and are respectively disposed on both sides of the first part of the transmission housing located within the main housing in the width extension direction W.

[0100] In one embodiment, the first and second elastic supports located in the receiving chamber and the third and fourth elastic supports located in the first damping gap are elastic elements of different forms.

[0101] In one embodiment, the first elastic support and the second elastic support are configured as springs.

[0102] In one embodiment, the third elastic support and the fourth elastic support are configured as rubber components.

[0103] Compared with the prior art, in the preferred embodiment of this application, by reasonably optimizing the arrangement of the deceleration structure inside the transmission housing and suspending the transmission housing under the main housing through an elastic support, the main housing does not need to fully surround the transmission housing in the height extension direction H and the width extension direction W. While ensuring the vibration reduction effect, the size of the main housing and the transmission housing is also reduced, making the pruning machine have a lighter visual effect and a better shock absorption effect.

[0104] Furthermore, the transmission housing is designed so that the plane of the opening of the vibration damping gap between the transmission housing and the main housing is higher than the cutting plane of the blade assembly. Additionally, a baffle plate is added to enclose the elastic support at the front end of the transmission housing within the receiving cavity. During the use of the pruning machine, the probability of branches and shrubs on the cutting plane inserting or embedding into the vibration damping gap between the main housing and the transmission housing is reduced, ensuring the normal operation of the pruning machine. Attached Figure Description

[0105] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0106] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0107] Figure 1 A three-dimensional schematic diagram of the pruning machine provided in this application;

[0108] Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0109] Figure 3 An exploded view of the pruning machine provided in this application from another perspective;

[0110] Figure 4 Front view of the pruning machine after the battery pack and part of the blade assembly have been removed;

[0111] Figure 5 A bottom view of the pruning machine after removing the rear handle, battery pack, side shield, and part of the blade assembly;

[0112] Figure 6 for Figure 4 A schematic diagram of the pruning machine after removing part of the main housing, part of the transmission housing, the blade assembly, and the rear handle;

[0113] Figure 7 A top view of the motor, transmission mechanism, part of the transmission housing, and part of the blade assembly;

[0114] Figure 8 A three-dimensional schematic diagram of the motor, transmission mechanism, and some blade assemblies;

[0115] Figure 9 This is a schematic diagram of a speed reduction structure, including a planetary gear set.

[0116] Explanation of reference numerals and components in the accompanying drawings:

[0117] 100. Pruning machine;

[0118] 10. Main unit housing; 101. First vibration damping gap; 102. Opening; 103. Motor housing; 104. Connecting housing; 105. Second vibration damping gap;

[0119] 201. Front handle; 202. Rear handle; 203. Safety guard plate; 204. Reception chamber; 205. First elastic support; 206. Elastic support; 207. Baffle plate; 208. Third elastic support; 209. Fourth elastic support;

[0120] 30. Blade assembly; 301. First blade; 302. Second blade; 303. Cutting plane;

[0121] 40. Transmission housing; 401. First part; 402. Second part; 4021. First housing / reduction housing; 4022. Second housing / eccentric housing;

[0122] 50. Battery pack; 501. Battery assembly mounting position;

[0123] 60. Transmission structure; 601. First eccentric wheel section; 602. Second eccentric wheel section; 603. First gear set; 6031. First driving gear; 6032. First driven gear; 6033. First sun gear; 6034. First planet gear; 6035. First planet carrier; 6036. First ring gear; 6037. First stage reduction output shaft; 604. Second gear set; 6041. Second driving gear; 6042. Second driven gear; 6043. Second sun gear; 6044. Second planet gear; 6045. Second planet carrier; 6046. Second ring gear; 6047. Second stage reduction output shaft;

[0124] 70. Motor; 701. Output shaft;

[0125] 80. Control unit;

[0126] d1, the spacing of the first damping gap in the width extension direction W;

[0127] d2, the distance between the outer edge of the second driven gear and the inner wall of the second housing in the width extension direction W;

[0128] h1, the distance in the height extension direction H between the plane where the opening of the first damping gap is located and the cutting plane;

[0129] h2, the spacing of the second damping gap in the height extension direction H;

[0130] h3, the distance in the height extension direction H between the plane where the opening is located and the lowest surface of the transmission housing in the height extension direction H;

[0131] W1, the width of the first housing / eccentric housing in the width extension direction W;

[0132] W2, the width of the outer edge wall of the opening of the first damping gap in the width extension direction W. Detailed Implementation

[0133] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0134] 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.

[0135] 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.

[0136] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "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.

[0137] 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.

[0138] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0139] As people's demands for quality of life increase, the living environment has become a growing concern. Consequently, cities and homes have created numerous lawns, gardens, golf courses, and roadside greenbelts to beautify their living environment. Lawns, gardens, golf courses, and roadside greenbelts all require regular maintenance, such as pruning shrubs into various shapes like flat, wavy, and spherical. Pruning machines have become a widely used tool in this context. Pruning machines use an eccentric wheel to convert rotary motion into the reciprocating motion of upper and lower blades, used to cut various shrubs and other vegetation, pruning them into different shapes.

[0140] In existing pruning machines, a main housing, a motor, a transmission housing, a blade assembly, and a grip are included. The grip is located on the main housing, the blade assembly is located at the front end of the main housing, the motor is located inside the main housing, and the transmission housing houses a transmission mechanism for converting the motor's output into reciprocating motion to drive the blade assembly. The main housing surrounds or partially surrounds the transmission housing, and the transmission mechanism is driven between the motor and the blade assembly. The grip includes at least one handle for the user to hold. Most pruning machines use a dual-handle design, meaning the grip includes a front handle and a rear handle, positioned at opposite ends of the main housing, allowing for easier handling and operation. To ensure reliable gripping, the front and rear handles are connected to the main housing using screws, bolts, integral molding, or other connection structures to prevent loosening. However, in actual use, the vibrations generated by the reciprocating motion of the blade assembly, the contact between the blade assembly and the pruning object, the vibrations generated by shearing, the vibrations generated by the operation of the transmission mechanism in the transmission housing, and the vibrations generated by the operation of the motor will be directly or indirectly transmitted to the front and rear handles through the main housing, causing the user's hands to feel numb and vibrating when holding the pruning machine, resulting in a poor grip experience.

[0141] Therefore, some existing pruning machines incorporate vibration damping devices between the main housing and the transmission housing to reduce vibration transmission between them. This requires a sufficient damping clearance between the main housing and the transmission housing for these devices. Since the main housing and transmission housing are enclosed or semi-enclosed, the height and width of the main housing are already greater than or equal to the height and width of the transmission housing. Further requiring a damping clearance between them will increase the height and / or width of the main housing.

[0142] Typically, the aforementioned vibration damping gaps have openings that connect to the outside. When the transmission housing is enclosed or partially enclosed within the main housing, the plane containing the opening of the vibration damping gap will be at least flush with the bottom surface of the transmission housing, and may even be lower than it. When the user holds the pruning machine with both hands and manipulates it to move back and forth within a certain plane for pruning and cutting, branches, shrubs, etc., located within that plane will embed or insert into the vibration damping gap through the opening, causing the pruning machine to jam. Prolonged jamming will affect the normal operation of the pruning machine. Therefore, the user needs to turn off the pruning machine and clean the branches, shrubs, etc., from the vibration damping gap. If necessary, the machine may need to be disassembled to complete the cleaning work, which greatly affects work efficiency.

[0143] Therefore, one embodiment of this application provides a pruning machine 100, which extends along three orthogonal spatial directions: the length extension direction L, the width extension direction W, and the height extension direction H. For ease of explanation, the front and rear directions in the length extension direction L, the left and right directions in the width extension direction W, and the up and down directions in the height extension direction H are defined by arrows, as shown below. Figure 1 As shown.

[0144] See Figure 1 , Figure 2 , Figure 4 As shown, the pruning machine 100 includes a main body housing 10, a front handle 201 and a rear handle 202 for the user to grip, a blade assembly 30, and a transmission housing 40. A safety guard 203 is provided on the front side of the front handle 201, located between the front handle 201 and the blade assembly 30, to protect the user's hand gripping the front handle 201 during use. A battery assembly mounting position 501 is provided below the rear handle 202, and a battery pack 50 is mounted on the battery assembly mounting position 501. See also... Figure 6 As shown, the pruning machine also includes a transmission mechanism 60, a motor 70, and a control unit 80. The transmission mechanism 60 is housed in a transmission housing 40, while the motor 70 and control unit 80 are housed in a main housing 10. The transmission mechanism 60 is driven by both the motor 70 and the blade assembly 30, thereby transmitting the driving force of the motor 70 to the blade assembly 30. Typically, the transmission mechanism 60 includes a reduction gear structure and a first eccentric wheel portion 601 and a second eccentric wheel portion 602 arranged sequentially in the height extension direction H. The blade assembly 30 includes a first blade 301 and a second blade 302, which are arranged sequentially in the height extension direction H. The reduction structure is connected to the motor 70 to reduce the speed of the motor 70, and transmits the power of the motor 70 to the first blade 301 through the first eccentric wheel 601 and to the second blade 302 through the second eccentric wheel 602, so that the first blade 301 and the second blade 302 can move relative to each other along the length extension direction L to perform the cutting function. The plane where the contact surface of the first blade 301 and the second blade 302 is located during the relative movement is the cutting plane 303.

[0145] See also Figure 3 , Figure 5As shown, the transmission housing 40 includes a first part 401 housed inside the main housing 10 and a second part 402 that houses at least a portion of the deceleration structure. To achieve vibration reduction, the transmission housing 40 and the main housing 10 are suspended and connected by an elastic support member. One end of the elastic support member is connected to the transmission housing 40, and the other end of the elastic support member is connected to the main housing 10, the safety guard plate 203, or the front handle 201. Specifically, the bottom of the main housing 10, safety guard plate 203, or front handle 201 is recessed upward to form a receiving chamber 204. The elastic support includes a first elastic support 205 and a second elastic support 206. The first elastic support 205 and the second elastic support 206 are located inside the receiving chamber 204, and the first elastic support 205 and the second elastic support 206 are respectively disposed on both sides of the transmission housing 40 in the width extension direction W. This arrangement is to form a vibration damping structure at the front end of the transmission housing 40. Since the front vibration damping structure is closer to the blade assembly 30, in order to prevent branches and shrubs from embedding or inserting into the receiving chamber 204, the pruning machine 100 also includes a baffle plate 207 disposed below the elastic support in the height extension direction H, so that the baffle plate 207 blocks the receiving chamber 204 upward to isolate it from the outside. A first damping gap 101 is provided between the main housing 10 and the first part 401 of the transmission housing 40, at least in the width extension direction W. The first damping gap 101 also has an opening 102 that faces downward along the height extension direction H and is in fluid communication with the outside. The purpose of providing the opening 102 is to allow external cooling airflow to enter the interior of the main housing 10 more smoothly to cool and dissipate heat from the components inside the main housing 10. At the same time, the opening 102 is visible when viewed from bottom to top in the height extension direction H. This arrangement is to facilitate the user's observation of whether there are any foreign objects in the first damping gap 101 that may affect the normal use of the pruning machine 100. Correspondingly, the elastic support also includes a third elastic support 208 and a fourth elastic support 209, which are respectively provided on both sides of the first part 401 of the transmission housing 40 located inside the main housing 10 in the width extension direction W.

[0146] In one embodiment, the first elastic support 205 and the second elastic support 206 located in the receiving chamber 204 and the third elastic support 208 and the fourth elastic support 209 located in the first damping gap 101 are elastic elements of different forms. The first elastic support 205 and the second elastic support 206 are configured as springs, and the third elastic support 208 and the fourth elastic support 209 are configured as rubber parts. When the pruning machine 100 is working normally, the part of the transmission housing 40 near the blade assembly 30 is suspended and connected to the inner wall of the receiving chamber 204 through the first elastic support 205 and the second elastic support 206. The part of the transmission housing 40 near the rear handle 202 is suspended and connected to the inner wall of the main housing 10 through the third elastic support 208 and the fourth elastic support 209. This arrangement allows the entire transmission housing 40 to be suspended below the main housing 10. The multiple elastic supports can suppress the vibration generated by the blade assembly 30 contacting the pruning object, the vibration generated by the shearing, the vibration generated by the operation of the transmission mechanism 60 inside the transmission housing 40, and the vibration generated by the operation of the motor 70, which are transmitted to the front handle 201 and the rear handle 202. The vibration reduction effect is obvious, and the user's grip experience is good.

[0147] In existing technologies, the main housing 10 is designed to surround or semi-surround the transmission housing 40, with a vibration damping gap between them. This results in an increased height and / or width of the main housing 10, making the entire machine appear bulky and heavy. Furthermore, the vibration damping gap can become jammed, affecting the machine's normal operation. (See also...) Figure 4As shown, in this embodiment, the second part 402 is intentionally configured to protrude downwards in the height extension direction H and be exposed outside the opening 102. Unlike the prior art where the plane where the opening of the vibration damping gap is located is flush with or lower than the bottom plane of the transmission housing 40, with the above configuration, in the height extension direction H, the plane where the opening 102 of the first vibration damping gap 101 is located will be higher than the bottom plane of the transmission housing 40. That is, in the height extension direction H, the shortest distance between the plane where the opening 102 is located and the lowest surface of the transmission housing 40 in the height extension direction H is greater than or equal to 31mm. Preferably, the distance h3 between the two can be in the range of 31mm to 40mm. In other preferred embodiments, the distance h3 between the two can be 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, or 39mm. Furthermore, the plane containing the opening 102 is positioned higher than the cutting plane 303, ensuring that the minimum distance between the plane containing the opening 102 and the cutting plane 303 in the height extension direction H is not less than 10mm. The preferred distance h1 ranges from 11mm to 16mm. In other preferred embodiments, the distance h1 can be 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, or 16mm. When the user holds the pruning machine 100 with both hands and moves it back and forth within a certain plane for pruning and cutting, because the plane containing the opening 102 is higher than the cutting plane 303 and the lowest surface of the transmission housing 40, the probability of branches and shrubs contacted by the pruning machine 100 during the cutting process embedding or inserting into the first vibration damping gap 101 through the opening 102 is greatly reduced, and even branch jamming may not occur, thereby reducing the failure rate of the pruning machine 100.

[0148] See further Figure 4 , Figure 6 and Figure 8 As shown, the reduction structure in the transmission mechanism 60 includes a first gear set 603 and a second gear set 604 for reducing the speed of the motor 70. The first gear set 603 transmits power between the motor 70 and the second gear set 604, while the second gear set 604 transmits power between the first gear set 603 and the blade assembly 30. Correspondingly, the second part 402 of the transmission housing 40 includes a first housing 4021 that at least partially houses the first gear set 603 and a second housing 4022 that houses the first eccentric wheel portion 601 and the second eccentric wheel portion 602. The second housing 4022 and the first housing 4021 are arranged one behind the other in the length extension direction L. The first gear set 603 is powered by the motor 70, therefore the first housing 4021, which at least partially houses the first gear set 603, is configured to be suspended directly below the motor 70 without obstructing the opening 102.

[0149] To increase the air intake range and visibility, the first damping gap 101 is preferably arranged around the circumference of the first portion 401 of the transmission housing 40. Alternatively, it can be arranged around the circumference of the first portion 401 first and then extended along the length extension direction L toward the blade assembly 30. Since the second housing 4022 is located in front of the first housing 4021 in the length extension direction L and extends toward the blade assembly 30, the first eccentric wheel portion 601 and the second eccentric wheel portion 602 housed in the second housing 4022 can be driven to connect with the first blade 301 and the second blade 302 respectively. The opening 102 of the first damping gap 101 connecting to the outside will be partially blocked by the second housing 4022 in the height extension direction H. However, the blocked part of the opening 102 has little impact on the entry of cooling airflow and the user's observation of the internal condition of the damping gap.

[0150] In detail, the main housing 10 includes a motor housing 103 extending in the height extension direction H and at least housing the motor 70, and a connecting housing 104 extending in the length extension direction L and located between the motor housing 103 and the front handle 201. The connecting housing 104 can house a control unit 80 for controlling the motor 70, and can also be used to house other components. The first part 401 of the transmission housing 40 is located in the motor housing 103. The first housing 4021 is configured to be suspended directly below the motor 70 without obstructing the opening 102. It can be simply understood that the first housing 4021 protrudes downward from the first part 401 in the height extension direction H and is exposed outside the motor housing 103. The second housing 4022 extends from the first housing 4021 in the length extension direction L toward the blade assembly direction 30. In order to ensure the vibration reduction effect of the above-mentioned elastic support, it is preferable to separate the connecting housing 104 and the second housing 4022 in the height extension direction H by a second vibration reduction gap 105. The spacing h2 of the second damping gap 105 in the height extension direction H ranges from 3mm to 5mm. Preferably, the spacing h2 of the second damping gap 105 in the height extension direction H can be 3.5mm, 4mm, or 4.5mm. Within the range of the first damping gap 101 and the second damping gap 105, the elastic support between the transmission housing 40 and the main housing 10 can suppress contact between the two in the width extension direction W and the height extension direction H, thereby achieving the purpose of vibration reduction.

[0151] Based on this, by exposing the second part 402 of the transmission housing 40, namely the first housing 4021 and the second housing 4022, below the main housing 10, compared with the prior art where the main housing 10 surrounds or partially surrounds the transmission housing 40, the height of the main housing 10 in the height extension direction H provided in this embodiment can be greatly reduced. That is, the height H1 of the motor housing 103 is in the range of 85mm to 120mm, and the height H2 of the connecting housing 104 is in the range of 50mm to 55mm.

[0152] See further Figures 6 to 8 As shown, the first gear set 603 in the reduction structure of this embodiment includes a first driving gear 6031 and a first driven gear 6032 that mesh and drive each other. The first driving gear 6031 is located directly below the motor 70 and is driven and connected to the output shaft 701 of the motor 70. The number of teeth of the first driving gear 6031 is set to be less than the number of teeth of the first driven gear 6032, providing a structural basis for realizing the first stage of reduction. The second gear set 604 includes a second driving gear 6041 and a second driven gear 6042 that mesh and drive each other. The number of teeth of the second driving gear 6041 is set to be less than the number of teeth of the second driven gear 6042, providing a structural basis for realizing the second stage of reduction. The second driving gear 6041 is coaxially connected to the first driven gear 6032, and the first eccentric wheel portion 601 and the second eccentric wheel portion 602 are driven and connected to the second driven gear 6042. The power of the motor 70 is transmitted to the first driving gear 6031 via the output shaft 701. The first driving gear 6031 then transmits the power to the first driven gear 6032, which meshes with it, completing the first stage of speed reduction. The first driven gear 6032 rotates to drive the second driving gear 6041 to rotate. The second driving gear 6041 then transmits the power to the second driven gear 6042, which meshes with it, completing the second stage of speed reduction. The second driven gear 6042 drives the first eccentric wheel 601 and the second eccentric wheel 602 to rotate, thereby causing the first blade 301 and the second blade 302 to move relative to each other in the length extension direction L.

[0153] Regarding the arrangement of the first gear set 603 and the second gear set 604 in the transmission housing, preferably, at least the first driving gear 6031 of the first gear set 603 is housed in the first housing 4021, and at least the second driven gear 6042 of the second gear set 604 is housed in the second housing 4022. The first driven gear 6032 and the second driving gear 6041 can be coaxially arranged in the first housing 4021, at the connection between the first housing 4021 and the second housing 4022, or directly in the second housing 4022. Since the number of teeth of the first driven gear 6032 is greater than the number of teeth of the first driving gear 6031, to reduce the size of the first housing 4021, it is preferable to coaxially arrange the first driven gear 6032 and the second driving gear 6041 at the connection between the first housing 4021 and the second housing 4022, or directly in the second housing 4022. Since the transmission housing 40 is designed to meet the housing requirements of the aforementioned deceleration structure, the length of the transmission housing 40, namely the first housing 4021 and the second housing 4022, in the length extension direction L has certain dimensional requirements. Based on this, the first housing 4021 only accommodates the first drive gear 6031 with a small number of teeth, so that the width W1 of the first housing 4021 in the width extension direction W can be appropriately reduced.

[0154] It is worth noting that when reducing the width of the first housing 4021 in the width extension direction W, the vibration reduction requirements of the entire pruning machine 100 also need to be considered, namely, the spacing / width of the first vibration reduction gap 101 between the motor housing 103 and the first part 401 of the transmission housing 40 in the width extension direction W. Given that the width of the motor housing 103 in the width extension direction W is constant, if the spacing of the first vibration reduction gap 101 is too small, it will not meet the vibration reduction requirements of the transmission housing 40. If the spacing of the first vibration reduction gap 101 is increased to meet the vibration reduction requirements, it will impose extreme requirements on the width of the first housing 4021 in the width extension direction W, and may even cause the first housing 4021 to fail to meet the housing requirements of the deceleration structure. Further details can be found in the following references. Figure 5As shown, in this embodiment, the maximum width of the first housing 4021 in the width extension direction W is W1, and the maximum width of the outer edge wall of the opening 102 of the first vibration damping gap 101 in the width extension direction W is W2. The ratio of W1 to W2 is not greater than 0.9, so that the spacing d1 of the first vibration damping gap 101 in the width extension direction W ranges from 3mm to 5mm. Preferably, the spacing d1 of the first vibration damping gap 101 in the width extension direction W can be 3.5mm, 4mm, or 4.5mm. The width W1 of the first housing 4021 in the width extension direction W ranges from 30mm to 76mm. In other embodiments, the width W1 of the first housing 4021 in the width extension direction W can be 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, or 75mm. The width W2 of the outer edge wall of the opening 102 of the first vibration damping gap 101 in the width extension direction W ranges from 40mm to 86mm. In other embodiments, the width W2 of the outer edge wall of the opening 102 of the first vibration damping gap 101 in the width extension direction W can be 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, or 85mm. By controlling the width ratio of the first housing 4021 and the opening 102 of the first vibration damping gap 101 in the width extension direction W, the vibration damping requirements of the transmission housing 40 can be met while also taking into account the visual requirements of overall miniaturization.

[0155] Since the second housing 4022 is completely exposed below the connecting housing 104, and its two sides are unobstructed in the width extension direction W, and separated in the height extension direction H by the second damping gap 105, the width of the second housing 4022 in the width extension direction W does not constitute a significant factor affecting the width of the connecting housing 104 in the width extension direction W. Under the premise of meeting the housing requirements of the control unit 80 and / or other components, the width of the connecting housing 104 can be reduced to at least the same as or smaller than the width of the second housing 4022. That is, the projection of the connecting housing 104 on the cutting plane 303 is always within the coverage area of ​​the projection of the second housing 4022 on the cutting plane 303. For a more intuitive understanding, see... Figure 5 As shown, the second housing 4022 has a maximum width W3 in the width extension direction W, and the connecting housing 104, which is spaced apart from the second housing 4022 in the height extension direction H, has a maximum width W4 in the width extension direction W. The maximum width W4 is less than or equal to the maximum width W3. See also Figure 7As shown, since the number of teeth of the second driven gear 6042 is greater than the number of teeth of the second driving gear 6041, and the second driven gear 6042 is drivenly connected to the first eccentric wheel 601 and the second eccentric wheel 602, in order to control the maximum width W3 of the second housing 4022 to reduce the size of the second housing 4022, without affecting the normal operation of the second gear set 604, the maximum distance between the outer edge of the second driven gear 6042 and the inner sidewall of the second housing 4022 in the width extension direction W is controlled within the range of 1mm to 2mm, and the distance d2 between the two can be 1.1mm, 1.3mm, 1.5mm, 1.7mm, or 1.9mm. Correspondingly, the maximum width W3 of the second housing 4022 in the width extension direction W is less than or equal to 75 mm. Preferably, the width W3 of the second housing 4022 in the width extension direction W ranges from 60 mm to 75 mm. In other embodiments, the width W3 of the second housing 4022 in the width extension direction W can be 62 mm, 64 mm, 66 mm, 68 mm, 70 mm, 72 mm, 74 mm, or 75 mm. The width W4 of the connecting housing 104 in the width extension direction W ranges from 75 mm to 82 mm. In other embodiments, the width W4 of the connecting housing 104 in the width extension direction W can be 76 mm, 78 mm, or 80 mm.

[0156] In other embodiments of this application, see Figure 9As shown, the first gear set 603 in the reduction structure includes a first planetary gear set located directly below the motor 70. The first planetary gear set includes a first sun gear 6033, at least two first planetary gears 6034, a first planetary carrier 6035, and a first ring gear 6036. The first sun gear 6033 is located inside the first ring gear 6036 and the two are coaxially arranged. At least two first planetary gears 6034 are externally meshed between the first sun gear 6033 and the first ring gear 6036 along the circumferential direction of the first sun gear 6033. The first planetary carrier 6035 is connected to the planetary gears 6034. The output shaft 701 of the motor 70 is drivenly connected to the first sun gear 6033. A first-stage reduction output shaft 6037 is provided on the first ring gear 6036 or the first planetary carrier 6035. In the reduction structure, the second gear set 604 transmits power between the first-stage reduction output shaft 6037 and the blade assembly 30. The second gear set 604 includes a second planetary gear set, which includes a second sun gear 6043, at least two second planetary gears 6044, a second planetary carrier 6045, and a second ring gear 6046. The second sun gear 6043 is located within the second ring gear 6046 and the two are coaxially arranged. At least two second planetary gears 6044 are externally meshed along the circumference of the second sun gear 6043 on the second ring gear 6046. Between the second sun gear 6043 and the second ring gear 6046, the second sun gear 6043 is directly driven by the first reduction output shaft 6037 in the first gear set 603, or indirectly driven by other transmission structures such as external meshing gear sets. The second planetary carrier 6045 is connected to the second planet gears 6044. The second reduction output shaft 6047 is provided on the second ring gear 6046 or the second planetary carrier 6045. The first eccentric wheel portion 601 and the second eccentric wheel portion 602 are driven by the second reduction output shaft 6047. The power of the motor 70 is transmitted to the first sun gear 6033 through the output shaft 701. The first sun gear 6033 transmits power to the first reduction output shaft 6037 on the first ring gear 6036 or the first planetary carrier 6035 through at least two first planet gears 6034, thereby completing the first stage of reduction. The first-stage reduction output shaft 6037 directly or indirectly drives the second sun gear 6043 to rotate. The second sun gear 6043 transmits power to the second-stage reduction output shaft 6047 on the second ring gear 6046 or the second planetary carrier 6045 through at least two second planetary gears 6044, thereby completing the second-stage reduction. The second-stage reduction output shaft 6047 drives the first eccentric wheel 601 and the second eccentric wheel 602 to rotate, thereby causing the first blade 301 and the second blade 302 to move relative to each other in the length extension direction L. Similarly, without affecting the normal operation of the second gear set 604, the size of the second housing 4022 in the width extension direction W can be reduced by controlling the distance between the outer edge of the second ring gear 6046 and the inner wall of the second housing 4022 within a reasonable range.

[0157] Furthermore, another embodiment of this application provides a pruning machine 100, aimed at solving the technical problem of how to reduce the size of the main housing 10, making the main housing 10 more visually compact, while reducing the occurrence of branch jamming and lowering the failure rate of the pruning machine 100. See also Figure 1 , Figure 2 , Figure 4 As shown, the pruning machine 100 includes a main body housing 10, a front handle 201 and a rear handle 202 for the user to hold, a blade assembly 30, and a transmission housing 40. A safety guard 203 is provided on the front side of the front handle 201, located between the front handle 201 and the blade assembly 30, to protect the user's hand gripping the front handle 201 during use. A battery assembly mounting position 501 is provided below the rear handle 202, and a battery pack 50 is mounted on the battery assembly mounting position 501. See also... Figure 6 As shown, the pruning machine 100 also includes a transmission mechanism 60, a motor 70, and a control unit 80. The transmission mechanism 60 is housed in a transmission housing 40, while the motor 70 and control unit 80 are housed in a main housing 10. The transmission mechanism 60 is driven connected to both the motor 70 and the blade assembly 30, thereby transmitting the driving force of the motor 70 to the blade assembly 30. Typically, the transmission mechanism 60 includes a reduction gear structure and a first eccentric wheel portion 601 and a second eccentric wheel portion 602 arranged sequentially in the height extension direction H. The blade assembly 30 includes a first blade 301 and a second blade 302, which are arranged sequentially in the height extension direction H. The reduction gear structure is poweredly connected to the motor 70 to reduce the rotational speed of the motor 70, and transmits the power of the motor 70 to the first blade 301 via the first eccentric wheel portion 601 and to the second blade 302 via the second eccentric wheel portion 602, allowing the first blade 301 and the second blade 302 to move relative to each other along the length extension direction L to perform a cutting function. The plane where the contact surface of the first blade 301 and the second blade 302 is located during the relative motion is the cutting plane 303.

[0158] See also Figure 3 , Figure 5As shown, in order to achieve vibration reduction, the transmission housing 40 and the main housing 10 are suspended by an elastic support member. One end of the elastic support member is connected to the transmission housing 40, and the other end of the elastic support member is connected to the main housing 10, the safety guard plate 203, or the front handle 201. Specifically, the bottom of the main housing 10, safety guard plate 203, or front handle 201 is recessed upward to form a receiving chamber 204. The elastic support includes a first elastic support 205 and a second elastic support 206. The first elastic support 205 and the second elastic support 206 are located inside the receiving chamber 204, and the first elastic support 205 and the second elastic support 206 are respectively disposed on both sides of the transmission housing 40 in the width extension direction W. This arrangement is to form a vibration damping structure at the front end of the transmission housing 40. Since the front vibration damping structure is closer to the blade assembly 30, in order to prevent branches and shrubs from embedding or inserting into the receiving chamber 204, the pruning machine 100 also includes a baffle plate 207 disposed below the elastic support in the height extension direction H, so that the baffle plate 207 blocks the receiving chamber 204 upward to isolate it from the outside. The transmission housing 40 includes a first portion 401 housed within the main housing 10. A first damping gap 101 is provided between the main housing 10 and the first portion 401 at least in the width extension direction W. The first damping gap 101 also has an opening 102 extending downwards in the height extension direction H and communicating with the outside fluid. The purpose of providing the opening 102 is to allow external cooling airflow to enter the interior of the main housing 10 more smoothly, cooling and dissipating heat from the components inside the main housing 10. At the same time, the opening 102 is visible when viewed from bottom to top in the height extension direction H, so as to facilitate the user's observation of whether there are any foreign objects in the first damping gap 101 that may affect the normal use of the pruning machine 100. Correspondingly, the elastic support also includes a third elastic support 208 and a fourth elastic support 209, which are respectively provided on both sides of the first portion 401 of the transmission housing 40 located within the main housing 10 in the width extension direction W.

[0159] In one embodiment, the first elastic support 205 and the second elastic support 206 located in the receiving chamber 204 and the third elastic support 208 and the fourth elastic support 209 located in the first damping gap 101 are elastic elements of different forms. The first elastic support 205 and the second elastic support 206 are configured as springs, and the third elastic support 208 and the fourth elastic support 209 are configured as rubber parts. When the pruning machine 100 is working normally, the part of the transmission housing 40 near the blade assembly 30 is suspended and connected to the inner wall of the receiving chamber 204 through the first elastic support 205 and the second elastic support 206. The part of the transmission housing 40 near the rear handle 202 is suspended and connected to the inner wall of the main housing 10 through the third elastic support 208 and the fourth elastic support 209. In this way, the entire transmission housing 40 can be suspended and set below the main housing 10. The multiple elastic supports can suppress the vibration generated by the blade assembly 30 contacting the pruning object, the vibration generated by the shearing, the vibration generated by the operation of the transmission mechanism 60 in the transmission housing 40, and the vibration generated by the operation of the motor 70 to the front handle 201 and the rear handle 202. The vibration reduction effect is obvious and the user's grip experience is good.

[0160] In existing technologies, the main housing 10 is designed to surround or partially surround the transmission housing 40, with a vibration damping gap between them. This results in an increased height and / or width of the main housing 10, making the entire machine appear bulky and heavy. Furthermore, the vibration damping gap can become jammed, affecting normal machine operation. In this embodiment, the transmission housing 40 includes an eccentric housing 4022 that houses the first eccentric wheel portion 601 and the second eccentric wheel portion 602. In the height extension direction H, the eccentric housing 4022 protrudes downwards and is exposed outside the opening 102. Unlike existing technologies where the plane of the vibration damping gap opening 102 is flush with or lower than the bottom plane of the transmission housing 40, this design ensures that in the height extension direction H, the plane of the first vibration damping gap opening 102 is higher than the bottom plane of the transmission housing 40. Specifically, in the height extension direction H, the shortest distance between the plane of the opening 102 and the lowest surface of the transmission housing 40 in the height extension direction H is greater than or equal to 31 mm. Preferably, the distance h3 between them can be in the range of 3. In other preferred embodiments, the distance h3 between the two can be 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, or 39mm. Even more specifically, the plane where the opening 102 is located is set higher than the cutting plane 303, so that the minimum distance between the plane where the opening 102 is located and the cutting plane 303 in the height extension direction H is not less than 10mm. Preferably, the distance h1 between the two ranges from 11mm to 16mm. In other embodiments, the distance h1 between the two can be 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, or 16mm. When the user holds the pruning machine 100 with both hands and moves it back and forth in a certain plane to prune and cut, since the plane where the opening 102 is located is higher than the cutting plane 303 and the lowest surface of the transmission housing 40, the probability that the branches and shrubs that the pruning machine 100 comes into contact with during the cutting process will be greatly reduced from embedding or inserting into the first vibration damping gap 101 through the opening 102, and there will even be no branch jamming, thereby reducing the failure rate of the pruning machine 100.

[0161] Unlike the embodiments described above, the reduction structure in the transmission mechanism 60 in this embodiment includes at least one set of planetary gears that transmit power from the motor 70 to the first eccentric wheel 601 and the second eccentric wheel 602. This can be a single set of planetary gears directly connected to the motor 70, the first eccentric wheel 601, and the second eccentric wheel 602, or multiple sets of planetary gears can be coaxially or offset and connected between the motor 70 and the first eccentric wheel 601 and the second eccentric wheel 602. (See [reference]). Figure 9As shown, the reduction structure includes two sets of planetary gears arranged coaxially in the vertical extension direction H. The eccentric housing 4022 protrudes downward from the first part 401 and is suspended directly below the motor 70. One or more sets of planetary gears can be entirely located in the first part 401, partially located in the first part 401 and partially located in the eccentric housing 4022, or entirely located in the eccentric housing 4022.

[0162] In another embodiment, the reduction structure in the transmission mechanism may further include at least one set of planetary gears and at least one set of external meshing gears. The output shaft 701 of the motor 70 may be driven and connected to either a planetary gear set or an external meshing gear set. The first eccentric wheel portion 601 and the second eccentric wheel portion 602 may be driven and connected to either a planetary gear set or an external meshing gear set. Correspondingly, the transmission housing 40 includes not only a first part 401 housed inside the main housing 10, but also a second part 402 that houses at least a portion of the reduction structure. The second part 402 includes the aforementioned eccentric housing 4022 that houses the first eccentric wheel portion 601 and the second eccentric wheel portion 602, and also a reduction housing 4021 that houses at least a portion of the planetary gear set or the external meshing gear set. The reduction housing 4021 protrudes downward from the first part 401 and is suspended directly below the motor 70 without obstructing the opening 102.

[0163] To increase the air intake range and visibility, the first damping gap 101 is preferably arranged around the circumference of the first portion 401 of the transmission housing 40. Alternatively, it can be arranged around the circumference of the first portion 401 first and then extended along the length extension direction L toward the blade assembly 30. To ensure that the first eccentric wheel portion 601 and the second eccentric wheel portion 602 housed in the eccentric housing 4022 can be driven connected to the first blade 301 and the second blade 302 respectively without being exposed outside the eccentric housing 4022, if the reduction structure includes at least one set of planetary gears that transmit power from the motor 70 to the first eccentric wheel portion 601 and the second eccentric wheel portion 602, the eccentric housing 4022 is configured to protrude downward from the first portion 401 in the height extension direction H, exposed outside the opening 102, and extend toward the blade assembly 30 in the length extension direction L. If the reduction structure includes at least one set of planetary gears and at least one set of external meshing gears, the eccentric housing 4022 is located in front of the reduction housing 4021 in the length extension direction L. Regardless of which of the two methods the eccentric housing 4022 adopts, the opening 102 connecting the first vibration damping gap 101 to the outside will be partially blocked by the eccentric housing 4022 in the height extension direction H. However, the blocked part of the opening 102 has little impact on the entry of cooling airflow and the user's observation of the internal situation of the first vibration damping gap 101.

[0164] In detail, the main housing 10 includes a motor housing 103 extending in the height extension direction H and at least housing the motor 70, and a connecting housing 104 extending in the length extension direction L and located between the motor housing 103 and the front handle 201, for housing the control unit 80 that controls the motor 70, and may also be used to house other components. The first part 401 of the transmission housing 40 is located in the motor housing 103. Whether the reduction housing 4021 is suspended directly below the motor 70 without obstructing the opening 102, or the eccentric housing 4022 is suspended downwards below the motor 70, at least a portion of the eccentric housing 4022 extends in the length extension direction L toward the blade assembly 30. To ensure the vibration damping effect of the aforementioned elastic support, it is preferable to separate the connecting housing 104 and the eccentric housing 4022 in the height extension direction H by a second vibration damping gap 105. The spacing h2 of the second damping gap 105 in the height extension direction H ranges from 3mm to 5mm, and can be 3.5mm, 4mm, or 4.5mm. Within the range of the first damping gap 101 and the second damping gap 105, the elastic support between the transmission housing 40 and the main housing 10 can suppress contact between them in the width extension direction W and the height extension direction H, thereby achieving the purpose of vibration reduction.

[0165] Based on this, by exposing the eccentric housing 4022 or the eccentric housing 4022 and the reduction housing 4021 below the main housing 10, compared with the prior art where the main housing 10 surrounds or semi-surrounds the transmission housing 40, the height of the main housing 10 in the height extension direction H provided in this embodiment can be greatly reduced. That is, the height H1 of the motor housing 103 is in the range of 85mm to 120mm, and the height H2 of the connecting housing 104 is in the range of 50mm to 55mm.

[0166] As can be seen from the above description, the reduction structure in this embodiment can be a combination of a planetary gear set or a planetary gear set and an external meshing gear set. Compared to using only external meshing gear sets, the length of the reduction structure in the length extension direction L and / or the height in the height extension direction H can be further reduced. The width in the width extension direction W is reduced by controlling the distance between the planetary gear set and / or the external meshing gear set and the inner wall of the transmission housing 40. Correspondingly, the width of the motor housing 103 and the connecting housing 104 included in the main housing 10 in the width extension direction W can also be appropriately reduced.

[0167] Furthermore, when considering the width of the eccentric housing 4022 and / or the reduction housing 4021 in the width extension direction W, it is also necessary to consider the vibration reduction requirements of the entire pruning machine 100, namely, the spacing / width of the first vibration reduction gap 101 between the motor housing 103 and the first part 401 of the transmission housing 40 in the width extension direction W. Given that the width of the motor housing 103 in the width extension direction W is constant, if the spacing of the first vibration reduction gap 101 is too small, it will not meet the vibration reduction requirements of the transmission housing 40. If the spacing of the first vibration reduction gap 101 is increased to meet the vibration reduction requirements, it will impose extreme requirements on the width of the eccentric housing 4022 and / or the reduction housing 4021 in the width extension direction W, and may even cause the eccentric housing 4022 and / or the reduction housing 4021 to fail to meet the housing requirements of the transmission structure. Therefore, similar to the above embodiments, this embodiment also controls the width ratio of the eccentric housing 4022 and / or the deceleration housing 4021 and the opening 102 of the first vibration damping gap 101 in the width extension direction W, so that the spacing d1 of the first vibration damping gap 101 in the width extension direction W meets the vibration damping requirements of the transmission housing 40. The range of d1 is 3mm to 5mm, or it can be 3.5mm, 4mm, or 4.5mm, while also taking into account the visual requirements of miniaturization of the whole machine.

[0168] Since the eccentric housing 4022 is partially or completely exposed below the connecting housing 104, correspondingly, this part of the eccentric housing 4022 has no obstruction on either side in the width extension direction W, and is separated from the connecting housing 104 in the height extension direction H by the second damping gap 105. This ensures that the width of the eccentric housing 4022 in the width extension direction W does not significantly affect the width of the connecting housing 104 in the width extension direction W. While meeting the housing requirements of the control unit 80 and / or other components, the width of the connecting housing 104 can be reduced to at least the same width as or smaller than the width of the eccentric housing 4022. That is, the projection of the connecting housing 104 onto the cutting plane 303 is always within the coverage area of ​​the projection of the eccentric housing 4022 onto the cutting plane 303. For a more intuitive understanding, see... Figure 5As shown, the eccentric housing 4022 has a maximum width W3 in the width extension direction W, and the connecting housing 104, which is separated from the eccentric housing 4022 in the height extension direction H, has a maximum width W4 in the width extension direction W. The maximum width W4 is less than or equal to the maximum width W3, and the maximum width W3 is less than or equal to 75 mm. Preferably, the width W3 of the eccentric housing 4022 in the width extension direction W ranges from 60 mm to 75 mm. In other embodiments, the width W3 of the eccentric housing 4022 in the width extension direction W can be 62 mm, 64 mm, 66 mm, 68 mm, 70 mm, 72 mm, 74 mm, or 75 mm. The width W4 of the connecting housing 104 in the width extension direction W ranges from 75 mm to 82 mm. In other embodiments, the width W4 of the connecting housing 104 in the width extension direction W can be 76 mm, 78 mm, or 80 mm.

[0169] As can be seen from the above description of the prior art, reducing the size of the main unit housing 10 to achieve a more compact visual effect, whether for the housing itself or the entire machine, is a crucial factor influencing user choice. Therefore, another embodiment of this application provides a pruning machine 100, which, compared to pruning machines in the prior art, exhibits superior miniaturization in its main unit housing 10 and overall design. See also... Figure 1 and Figure 4 As shown, the pruning machine 100 includes a main body housing 10, a front handle 201 and a rear handle 202 for the user to hold, a blade assembly 30, and a transmission housing 40. A safety guard 203 is provided on the front side of the front handle 201, located between the front handle 201 and the blade assembly 30, to protect the user's hand gripping the front handle 201 during use. A battery assembly mounting position 501 is provided below the rear handle 202, and a battery pack 50 is mounted on the battery assembly mounting position 501. See also... Figure 6As shown, the pruning machine 100 also includes a transmission mechanism 60, a motor 70, and a control unit 80. The transmission mechanism 60 is housed in a transmission housing 40, while the motor 70 and control unit 80 are housed in a main housing 10. The transmission mechanism 60 is drivenly connected to both the motor 70 and the blade assembly 30, thereby transmitting the driving force of the motor 70 to the blade assembly 30. Typically, the transmission mechanism 60 includes a reduction gear structure and a first eccentric wheel portion 601 and a second eccentric wheel portion 602 arranged sequentially in the height extension direction H. The blade assembly 30 includes a first blade 301 and a second blade 302, which are arranged sequentially in the height extension direction H. The reduction structure is connected to the motor 70 to reduce the speed of the motor 70, and transmits the power of the motor 70 to the first blade 301 through the first eccentric wheel 601 and to the second blade 302 through the second eccentric wheel 602, so that the first blade 301 and the second blade 302 can move relative to each other along the length extension direction L to perform the cutting function. The plane where the contact surface of the first blade 301 and the second blade 302 is located during the relative movement is the cutting plane 303.

[0170] See also Figure 3 , Figure 6 As shown, the main housing 10 includes a motor housing 103 extending in the height extension direction H and at least housing a motor 70, and a connecting housing 104 extending in the length extension direction L and located between the motor housing 103 and the front handle 201. The connecting housing 104 can house a control unit 80 for controlling the motor 70, and can also be used to house other components. The transmission housing 40 includes a first portion 401 housed inside the main housing 10 and a second portion 402 housing at least a portion of the reduction gear structure. The second portion 402 includes at least an eccentric housing 4022 housing a first eccentric wheel portion 601 and a second eccentric wheel portion 602. In this embodiment, along the height extension direction H, the eccentric housing 4022 is located below the connecting housing 104 and protrudes downwards, exposing itself outside the connecting housing 104. This ensures that the height of the eccentric housing 4022 along the height extension direction H does not significantly affect the height of the connecting housing 104 along the height extension direction H. The height H2 of the connecting housing 104 along the height extension direction H ranges from 50mm to 55mm. In other preferred embodiments, see... Figure 4As shown, a second vibration damping gap 105 in the height extension direction H can also be provided between the eccentric housing 4022 and the connecting housing 104 to separate them, providing a structural basis for the eccentric housing 4022 to perform vibration damping movement in the height extension direction H. Of course, if a second vibration damping gap 105 is provided, the spacing h2 of the second vibration damping gap 105 in the height extension direction H also needs to be set within a reasonable range. If the spacing is too small, it cannot meet the spatial requirements for the eccentric housing 4022 to perform vibration damping movement in the height extension direction H. If the spacing is too large, although it meets the vibration damping requirements, it will make the overall size, at least in the height extension direction H, larger, failing to meet the miniaturization requirements. The spacing h2 of the second vibration damping gap 105 in the height extension direction H ranges from 3mm to 5mm. Preferably, the spacing h2 of the second vibration damping gap 105 in the height extension direction H can be 3.5mm, 4mm, or 4.5mm.

[0171] The width of the eccentric housing 4022 in the width extension direction W is not a significant factor affecting the width of the connecting housing 104 in the width extension direction W. While meeting the housing requirements of the control unit 80 and / or other components, the width of the connecting housing 104 can be reduced to at least the same width as, or even smaller than, the width of the eccentric housing 4022. That is, the projection of the connecting housing 104 onto the cutting plane 303 is always within the coverage area of ​​the projection of the eccentric housing 4022 onto the cutting plane 303. For a more intuitive understanding, see [link to relevant documentation]. Figure 5 As shown, the eccentric housing 4022 has a maximum width W3 in the width extension direction W, and the connecting housing 104, which is separated from the eccentric housing 4022 in the height extension direction H, has a maximum width W4 in the width extension direction W. The maximum width W4 is less than or equal to the maximum width W3, and the maximum width W3 is less than or equal to 75 mm. Preferably, the width W3 of the eccentric housing 4022 in the width extension direction W ranges from 60 mm to 75 mm. In other embodiments, the width W3 of the eccentric housing 4022 in the width extension direction W can be 62 mm, 64 mm, 66 mm, 68 mm, 70 mm, 72 mm, 74 mm, or 75 mm. The width W4 of the connecting housing 104 in the width extension direction W ranges from 75 mm to 82 mm. In other embodiments, the width W4 of the connecting housing 104 in the width extension direction W can be 76 mm, 78 mm, or 80 mm.

[0172] See further Figure 4 , Figure 6 and Figure 8As shown, in this embodiment, the reduction structure of the transmission mechanism 60 includes a first gear set 603 and a second gear set 604 for reducing the speed of the motor 70. The first gear set 603 transmits power between the motor 70 and the second gear set 604, while the second gear set 604 transmits power between the first gear set 603 and the blade assembly 30. Correspondingly, the second part 402 of the transmission housing 40 also includes a reduction housing 4021 containing at least a portion of the first gear set 603. The eccentric housing 4022 and the reduction housing 4021 are arranged one after the other in the length extension direction L. The first gear set 603 is powered by the motor 70, therefore the reduction housing 4021, which at least partially houses the first gear set 603, protrudes downward from the first part 401 of the transmission housing 40 and is exposed outside the main housing 10, which can be simply understood as being exposed outside the motor housing 103. Thus, the reduction housing 4021 is located below the motor housing 103 and protrudes downwards, exposing itself outside the motor housing 103. This makes the height of the reduction housing 4021 in the height extension direction H not a significant factor affecting the height of the motor housing 103 in the height extension direction H. Consequently, the height H1 of the motor housing 103 in the height extension direction H ranges from 85mm to 120mm.

[0173] See further Figures 6 to 8 As shown, the first gear set 603 in the reduction structure of this embodiment includes a first driving gear 6031 and a first driven gear 6032 that mesh and drive each other. The first driving gear 6031 is located directly below the motor 70 and is driven and connected to the output shaft 701 of the motor 70. The number of teeth of the first driving gear 6031 is set to be less than the number of teeth of the first driven gear 6032, providing a structural basis for realizing the first stage of reduction. The second gear set 604 includes a second driving gear 6041 and a second driven gear 6042 that mesh and drive each other. The number of teeth of the second driving gear 6041 is set to be less than the number of teeth of the second driven gear 6042, providing a structural basis for realizing the second stage of reduction. The second driving gear 6041 is coaxially connected to the first driven gear 6032, and the first eccentric wheel portion 601 and the second eccentric wheel portion 602 are driven and connected to the second driven gear 6042. The power of the motor 70 is transmitted to the first driving gear 6031 via the output shaft 701. The first driving gear 6031 then transmits the power to the first driven gear 6032, which meshes with it, completing the first stage of speed reduction. The first driven gear 6032 rotates to drive the second driving gear 6041 to rotate. The second driving gear 6041 then transmits the power to the second driven gear 6042, which meshes with it, completing the second stage of speed reduction. The second driven gear 6042 drives the first eccentric wheel 601 and the second eccentric wheel 602 to rotate, thereby causing the first blade 301 and the second blade 302 to move relative to each other in the length extension direction L.

[0174] Regarding the arrangement of the first gear set 603 and the second gear set 604 in the transmission housing 40, preferably, at least the first driving gear 6031 in the first gear set 603 is housed in the reduction housing 4021. Since the second driven gear 6042 in the second gear set 604 is drivenly connected to the first eccentric wheel 601 and the second eccentric wheel 602, at least the second driven gear 6042 is housed in the eccentric housing 4022. The first driven gear 6032 and the second driving gear 6041, which are coaxially arranged, can be located in the reduction housing 4021, at the connection between the reduction housing 4021 and the eccentric housing 4022, or in the eccentric housing 4022. Since the number of teeth of the first driven gear 6032 is set to be greater than the number of teeth of the first driving gear 6031, in order to reduce the size of the reduction housing 4021, it is preferred to set the first driven gear 6032 and the second driving gear 6041 coaxially at the connection between the reduction housing 4021 and the eccentric housing 4022, or directly in the eccentric housing 4022. Since the transmission housing 40 has certain dimensional requirements in the length extension direction L to meet the above-mentioned reduction structure's housing requirements, the length of the transmission housing 40, i.e., the reduction housing 4021 and the eccentric housing 4022, has certain dimensional requirements. Based on this, the reduction housing 4021 only accommodates the first driving gear 6031 with a smaller number of teeth, so that the width W1 of the reduction housing 4021 in the width extension direction W can be appropriately reduced.

[0175] See Figure 7 As shown, since the number of teeth of the second driven gear 6042 is greater than the number of teeth of the second driving gear 6041, and the second driven gear 6042 is drivenly connected to the first eccentric wheel 601 and the second eccentric wheel 602, in order to control the maximum width W3 of the eccentric housing 4022 to reduce the size of the eccentric housing 4022, the maximum distance between the outer edge of the second driven gear 6042 and the inner sidewall of the eccentric housing 4022 in the width extension direction W can be controlled within the range of 1mm to 2mm without affecting the normal operation of the second gear set 604. The maximum distance between the two can be 1.1mm, 1.3mm, 1.5mm, 1.7mm, or 1.9mm.

[0176] In other embodiments of this application, the first gear set 603 and the second gear set 604 in the reduction structure can also be planetary gear sets, with the specific structure being the same as that in the embodiments involving planetary gear sets described above, and will not be repeated here. Similarly, without affecting the normal operation of the second gear set 604, the width of the eccentric housing 4022 in the width extension direction W can be reduced by controlling the distance between the outer edge of the second gear ring 6046 and the inner sidewall of the eccentric housing 4022 in the width extension direction W within a reasonable range.

[0177] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

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, the pruning machine comprising: The blade assembly includes a first blade and a second blade that perform a cutting function when in relative motion; A motor is used to drive relative motion between the first blade and the second blade. The main housing contains the motor. The transmission mechanism, driven by the motor, transmits the driving force of the motor to the blade assembly. The transmission mechanism includes a reduction structure and a first eccentric wheel and a second eccentric wheel arranged sequentially along the height extension direction H. The first eccentric wheel and the second eccentric wheel can drive the first blade and the second blade to generate relative motion. A transmission housing for accommodating the transmission mechanism; Front and rear handles for the operator to grip; The feature is that, in the width extension direction W, a first damping gap is provided between the main housing and the transmission housing, the first damping gap having an opening that faces downward along the height extension direction H and is in fluid communication with the outside; The transmission housing includes a first portion housed inside the main housing and a second portion that houses at least part of the deceleration structure. In the height extension direction H, the second portion protrudes downward and is exposed outside the opening.

2. The pruner according to claim 1, characterized in that At least a portion of the opening is configured to be visible when viewed from bottom to top in the height extension direction H.

3. The pruner of claim 1, wherein In the height extension direction H, the shortest distance between the plane containing the opening and the lowest surface of the transmission housing in the height extension direction H is greater than or equal to 31 mm.

4. The pruner of claim 1, wherein The deceleration structure includes a first-stage gear set that is poweredly connected to the motor to reduce the motor speed. The second part includes a first housing that at least partially houses the first-stage gear set and a second housing that houses the first eccentric wheel portion and the second eccentric wheel portion. The first housing is configured to be suspended directly below the motor without obstructing the opening.

5. The pruner of claim 4, wherein The second housing and the first housing are arranged one after the other in the length extension direction L. The deceleration structure further includes a second gear set to reduce the speed of the motor. The first gear set realizes the power transmission between the motor and the second gear set. The second gear set realizes the power transmission between the first gear set and the blade assembly. The first gear set includes a first driving gear and a first driven gear that mesh with each other. The number of teeth of the first driving gear is less than the number of teeth of the first driven gear. The first driving gear is at least partially housed in the first housing. The second gear set is housed in the second housing.

6. The trimmer of claim 4, wherein, The maximum width of the first housing in the width extension direction W is W1, the maximum width of the outer edge wall of the opening in the width extension direction W is W2, and the ratio of W1 to W2 is not greater than 0.

9.

7. The trimmer of claim 4, wherein, The main unit housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle; A cutting plane is defined between the first blade and the second blade, and the projection of the connecting housing on the cutting plane is always within the coverage area of ​​the projection of the second housing on the cutting plane.

8. The trimmer of claim 7, wherein, The second gear set includes a second driving gear and a second driven gear that mesh with each other. The number of teeth of the second driving gear is less than the number of teeth of the second driven gear. The first eccentric wheel portion and the second eccentric wheel portion are drivenly connected to the second driven gear. The maximum distance between the second driven gear and the inner sidewall of the second housing in the width extension direction W is 1mm to 2mm.

9. The trimmer of claim 4, wherein, The main unit housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle; In the height extension direction H, the connecting housing and the second housing are separated by a second vibration damping gap.

10. The pruner according to any one of claims 4 to 9, characterized in that The main unit housing includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle; The second housing has a maximum width W3 in the width extension direction W, and the connecting housing has a maximum width W4 in the width extension direction W. The maximum width W4 is less than or equal to the maximum width W3, and the maximum width W3 is less than or equal to 75 mm.

11. The trimmer of claim 9, wherein, The pruning machine also includes a safety guard plate disposed on the front side of the front handle and an elastic support member supporting the transmission housing suspended below the main housing. Within the first damping gap range and the second damping gap range, the elastic support member is used to prevent the transmission housing from contacting the main housing in the width extension direction W and the height extension direction H. The bottom of the main housing, the safety guard plate, or the front handle has an upwardly recessed receiving chamber. One end of the elastic support is connected to the transmission housing, and the other end of the elastic support is connected to the main housing, the safety guard plate, or the front handle. The elastic support includes a first elastic support and a second elastic support. The first elastic support and the second elastic support are located in the receiving chamber, and the first elastic support and the second elastic support are respectively disposed on both sides of the transmission housing in the width extension direction W.

12. The pruner of claim 11, wherein The pruning machine also includes a baffle plate disposed below the elastic support member in the height extension direction H, the baffle plate blocking the receiving chamber upward.

13. 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, wherein the pruning machine comprises: The blade assembly includes a first blade and a second blade that perform a cutting function when in relative motion; A motor is used to drive relative motion between the first blade and the second blade. The main housing, within which the motor and the control unit are housed; The transmission mechanism, driven by the motor, transmits the driving force of the motor to the blade assembly. The transmission mechanism includes a reduction structure and a first eccentric wheel and a second eccentric wheel arranged sequentially along the height extension direction H. The first eccentric wheel and the second eccentric wheel can drive the first blade and the second blade to generate relative motion. A transmission housing for accommodating the transmission mechanism; Front and rear handles for the operator to grip; The main unit housing is characterized in that it includes a motor housing that extends in the height extension direction H and at least houses the motor, and a connecting housing that extends in the length extension direction L and is located between the motor housing and the front handle; The transmission housing includes an eccentric housing that houses the first eccentric wheel portion and the second eccentric wheel portion; in the height extension direction H, the eccentric housing is located below the connecting housing, and the eccentric housing protrudes downward and is exposed outside the connecting housing.

14. The pruner of claim 13, wherein A cutting plane is defined between the first blade and the second blade, and the projection of the connecting housing onto the cutting plane is always within the coverage area of ​​the projection of the eccentric housing onto the cutting plane.

15. The pruner of claim 13, wherein In the height extension direction H, the connecting housing and the eccentric housing are separated by a second vibration damping gap.

16. The pruner of claim 13, wherein The reduction structure includes a first-stage gear set that is poweredly connected to the motor to reduce the speed of the motor. The transmission housing includes a first part housed within the main housing and a second part that houses at least a portion of the reduction structure. The second part also includes a reduction housing that houses at least a portion of the first-stage gear set. The reduction housing protrudes downward and is exposed outside the main housing.

17. 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, wherein the pruning machine comprises: The blade assembly includes a first blade and a second blade that perform a cutting function when in relative motion; A motor is used to drive relative motion between the first blade and the second blade. The main housing contains the motor. The transmission mechanism, driven by the motor, transmits the driving force of the motor to the blade assembly. The transmission mechanism includes a reduction structure and a first eccentric wheel and a second eccentric wheel arranged sequentially along the height extension direction H. The first eccentric wheel and the second eccentric wheel can drive the first blade and the second blade to generate relative motion. A transmission housing for accommodating the transmission mechanism; Front and rear handles for the operator to grip; The feature is that, in the width extension direction W, a first damping gap is provided between the main housing and the transmission housing, the first damping gap having an opening facing downward along the height extension direction H and communicating with the external fluid. The transmission housing includes an eccentric housing that houses the first eccentric and the second eccentric, and the eccentric housing is convex downward in the height direction H to be exposed outside the opening.

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