Handheld electric bamboo pole cutting shears

Abstract

The present application relates to a kind of handheld electric bamboo pole cutting scissors, including shell, drive assembly is equipped in shell, drive assembly is connected with two blade assemblies that are symmetrically distributed relative to the center line of shell;Blade assembly includes blade, the outer end of tail extended section of blade is hinged with the inner end of connecting rod, the outer end of connecting rod is hinged with shell, the inner end of tail extended section of blade is hinged with the extension of driven bevel gear, two driven bevel gears are coaxially arranged and are rotatably connected with shell, two bevel gears are connected with drive assembly, drive assembly can drive two bevel gears to move reversely, the efficiency of bamboo pole cutting is improved using the scissors of the present application, and it is beneficial to the cutting of thicker and harder bamboo pole.

Description

Technical Field

[0001] This invention relates to the field of handheld electric shears, specifically to a handheld electric bamboo harvesting shears. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Moso bamboo, with its short growth cycle, rapid growth, strong reproductive capacity, quick maturity, and high yield, is widely used in the construction, papermaking, and agriculture industries. It is commonly used in building construction, furniture assembly, and weaving, and can also be used to make various utensils and handicrafts. Bamboo pulp, after processing, is a high-quality raw material for papermaking. Moso bamboo has strong soil-binding capabilities, helping to conserve water and soil, and large-scale cultivation can prevent soil erosion, regulate local climate, purify air, and improve the quality of the ecological environment.

[0004] For dense bamboo forests with small spacing between plants, large-scale harvesting can be done using large machinery. However, for localized operations such as adjusting plant density or harvesting diseased or dead plants, large machinery is not feasible. Handheld electric bamboo harvesting shears are the ideal tool for this purpose. Currently, there are relatively few types of handheld bamboo harvesting shears on the market. They mainly consist of a high-speed DC motor, a high-ratio reduction mechanism, a shearing head, and a battery pack. The shearing head consists of two curved blades hinged together and mounted on the housing. When harvesting bamboo, the contact line between the blade and the bamboo stalk continuously increases, and the shearing force becomes increasingly greater. When trimming thicker or hardened diseased or dead bamboo stalks, it is often impossible to cut the bamboo in one go, resulting in the blade getting stuck at the bamboo cut. In this case, the operator needs to release the shear switch, shake the shears several times to disengage the blade from the bamboo cut, and rotate it around the bamboo at a certain angle before continuing to cut. For particularly thick and hard bamboo stalks, it may be necessary to rotate several times before cutting, which seriously affects the efficiency of bamboo harvesting. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a handheld electric bamboo harvesting shears that reduces the contact line length between the blade and the bamboo cutting edge, thereby reducing the risk of the blade getting stuck at the bamboo cutting edge.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: An embodiment of the present invention provides a handheld electric bamboo harvesting shears, including a housing, a drive assembly inside the housing, and two blade assemblies symmetrically distributed relative to the center line of the housing. Each blade assembly includes a blade, the outer end of the blade's tail extension is hinged to the inner end of a connecting rod, the outer end of the connecting rod is hinged to the housing, and the inner end of the blade's tail extension is hinged to an eccentric position of a driven bevel gear. The two driven bevel gears are coaxially arranged and rotatably connected to the housing. The two bevel gears are connected to the drive assembly, and the drive assembly can drive the two bevel gears to move in opposite directions.

[0007] Optionally, the driven bevel gear adopts a sector-shaped structure, the central end of the sector-shaped structure is rotatably connected to the housing through a rotating shaft, and the central end of the sector-shaped structure is provided with an extension, which is hinged to the inner end of the extension section of the blade tail.

[0008] Optionally, the extension is provided with a U-shaped groove, and a hinge shaft is provided in the U-shaped groove. The tail extension of the blade extends into the U-shaped groove and the inner end of the tail extension is rotatably connected to the hinge shaft.

[0009] Optionally, a gasket is provided between the tail extension of the blade and the groove surface of the U-shaped groove.

[0010] Optionally, washers are provided at the mating surfaces of the two driven bevel gears, with the washers contacting the surfaces of the two driven bevel gears on both sides respectively.

[0011] Optionally, the blade is an arc-shaped blade with a cutting edge on its inner arc edge. The end of the blade closest to the operator is the tail end, which has a tail extension section.

[0012] Optionally, the connecting rod includes a first rod portion and a second rod portion arranged in parallel, a hinge shaft is provided between the inner ends of the first rod portion and the second rod portion, the outer end of the tail extension of the blade is rotatably connected to the hinge shaft, and a rotating cylinder is provided between the outer ends of the first rod portion and the second rod portion, the rotating cylinder being rotatably connected to the housing through the hinge shaft.

[0013] Optionally, a gasket is provided between the rotating drum and the inner side of the housing.

[0014] Optionally, the drive assembly includes an active bevel gear, two driven bevel gears respectively disposed on both sides of the active bevel gear and meshing with the active bevel gear, the active bevel gear being connected to a rotation drive component disposed in the housing, the rotation drive component being able to drive the active bevel gear to rotate so that the two driven bevel gears rotate in opposite directions, and the rotation drive component being connected to a battery pack fixed in the housing via a power supply line.

[0015] Optionally, the housing is provided with a handle, and the handle is provided with a switch for the power supply line.

[0016] The beneficial effects of this invention are as follows: The handheld electric bamboo harvesting shears of the present invention consist of a four-bar linkage consisting of the blade extension, connecting rod, driven bevel gear, and housing. Two sets of four-bar linkages are symmetrically distributed with respect to the center line of the housing. The drive assembly can drive the two driven bevel gears to rotate in opposite directions, and the two blades simultaneously perform translational and rotational movements. The cut gradually expands from the bottom to the top of the blade opening formed by the two blades. There is a significant relative rotation between the blades and the bamboo pole. The blades perform both shearing and sawing movements on the bamboo pole, which can effectively prevent the two blades from getting stuck in the cut, improve the bamboo harvesting efficiency, and is beneficial for harvesting thicker and harder bamboo poles. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention. Figure 2 ; Figure 3 This is the present invention. Figure 1 A schematic diagram of the section along direction A; Figure 4 This is the present invention. Figure 1 A schematic diagram of the section along direction B; Among them, 101. First blade, 102. Second blade, 103. First connecting rod, 104. First washer, 105. Sixth hinge shaft, 107. Snap ring, 108. First housing part, 109. First hinge shaft, 110. Second hinge shaft, 111. First driven bevel gear, 112. Rotating shaft, 113. Bearing, 114. Second driven bevel gear, 115. Driving bevel gear, 116. Gear motor, 117. Lithium battery pack, 118. Fourth hinge shaft, 201. Second housing part, 202. Second washer, 203. Third washer, 204. Fourth washer, 205. Second bushing, 206. Third bushing, 207. First bushing. Detailed Implementation

[0019] In this embodiment, the tail end of the blade refers to the end of the blade that is closest to the user.

[0020] Example 1 This embodiment provides a handheld electric bamboo harvesting shears, such as... Figures 1-4As shown, the device includes a housing, inside which a drive assembly is connected to two blade assemblies located at the outer end of the housing. The drive assembly can drive the two blade assemblies to move, thereby harvesting bamboo poles. The two blade assemblies are symmetrically distributed with respect to the center line of the housing. In this embodiment, the two blade assemblies are centrally symmetrical with respect to the center line of the housing. The two blade assemblies have the same structure and are defined as the first blade assembly and the second blade assembly, respectively.

[0021] The housing is formed by a first housing part 108 and a second housing part 201 detachably connected by bolts, and the first housing part 108 and the second housing part 201 form a space for accommodating the drive assembly.

[0022] The first blade assembly includes a first blade 101, a first connecting rod 103, and a first driven bevel gear 111.

[0023] The first blade 101 has an arc-shaped structure, with its inner arc edge serving as the cutting edge, used for cutting bamboo poles.

[0024] The first blade 101 has a tail extension section at the end near the operator. Both the inner and outer ends of the tail extension section are provided with hinge holes. The inner end refers to the end of the tail extension section near the operator, and the outer end refers to the end of the tail extension section near the blade.

[0025] The first driven bevel gear 111 is an incomplete bevel gear. The first driven bevel gear 111 adopts a fan-shaped structure, and its outer arc surface is provided with a bevel tooth structure. Its central end is rotatably connected to the housing, and the central end is provided with an extension. The extension is eccentrically set relative to the center of the first driven bevel gear 111.

[0026] The first connecting rod 103 includes a first rod portion and a second rod portion arranged in parallel. A rotating cylinder is provided between the outer ends of the first rod portion and the second rod portion, and the rotating cylinder is rotatably connected to the housing.

[0027] In this embodiment, a first hinge shaft is provided between the inner ends of the first rod and the second rod. The first hinge shaft 109 passes through the inner ends of the first rod and the second rod. One end of the first hinge shaft 109 is provided with a head located outside the first rod, and the other end is provided with a stop block located outside the second rod. A retaining spring 107 is provided between the stop block and the outer side of the second rod. The first hinge shaft 109 is fixed between the first rod and the second rod by the retaining spring 107.

[0028] Furthermore, a gasket is provided between the head of the first hinge shaft 109 and the outer side of the first rod, and the gasket is in contact with the first rod and the head. In this embodiment, the gasket is an existing wear-resistant gasket to avoid friction damage to the head when the first rod rotates around the first hinge shaft.

[0029] The outer end of the tail extension of the first blade 101 is rotatably connected to the first hinge shaft 109, and a first bushing 207 is provided between the blade and the first hinge shaft 109.

[0030] Preferably, a first gasket 104 is provided between the tail extension of the first blade 101 and the inner side of the first rod and the second rod to prevent frictional damage between the first blade 101 and the first rod and the second rod.

[0031] The inner end of the tail extension of the first blade 101 is rotatably connected to the extension of the first driven bevel gear 111, thereby realizing the eccentric rotatable connection between the inner end of the tail extension of the first blade 101 and the first driven bevel gear 111.

[0032] In this embodiment, the extension of the first driven bevel gear 111 is provided with a U-shaped groove, and a second hinge shaft is provided in the U-shaped groove. One end of the second hinge shaft 110 is provided with a limiting block. The limiting block is embedded in the limiting groove provided on the outer side of the extension of the U-shaped groove to prevent relative rotation between the second hinge shaft 110 and the extension. The other end of the second hinge shaft 110 is fixedly connected to the extension by a screw, thereby fixing the second hinge shaft 110 in the U-shaped groove.

[0033] The inner end of the tail extension of the first blade 101 is rotatably connected to the second hinge shaft 110, and a second bushing 205 is provided between the tail extension of the first blade 101 and the second hinge shaft 110. A third gasket 203 is provided between the tail extension of the first blade 101 and the groove surface of the U-shaped groove to avoid frictional damage between the tail extension of the first blade 101 and the groove surface of the U-shaped groove.

[0034] The rotating cylinder is sleeved on the outer circumference of the third hinge shaft and is rotatably connected to the third hinge shaft. A third bushing is provided between the rotating cylinder and the third hinge shaft. A limiting block is provided at one end of the third hinge shaft. The limiting block is embedded in the limiting groove provided in the housing. The other end is fixedly connected to the housing by screws, thereby realizing the fixed connection between the third hinge shaft and the housing.

[0035] A gasket is provided between the end face of the rotating drum and the inner side of the housing to prevent friction damage.

[0036] The structure of the second blade assembly is exactly the same as that of the first blade assembly, including the second blade 102, the second connecting rod 106, and the second driven bevel gear 114.

[0037] The second blade 102 adopts an arc-shaped structure with a cutting edge on its inner arc edge. The tail end of the second blade 102 is provided with a tail extension section. The outer end of the tail extension section is rotatably connected to the inner end of the second connecting rod 106 through the fourth hinge shaft 118. The connection method is the same as the rotatable connection method between the inner end of the first connecting rod 103 and the tail extension section of the first blade 101, and will not be described again here.

[0038] The inner end of the tail extension of the second blade 102 is rotatably connected to the extension of the second driven bevel gear 114 via the fifth hinge shaft. The connection method is the same as the rotatable connection method between the inner end of the tail extension of the first blade 101 and the extension of the first driven bevel gear 111, and will not be described again here.

[0039] The outer end of the second connecting rod 106 is rotatably connected to the housing via the sixth hinge shaft 105, and a third bushing 206 is provided between the second connecting rod 106 and the housing. The connection method between the outer end of the first connecting rod 103 and the housing is the same as the connection method between the outer end of the second connecting rod 106 and the housing. A second gasket 202 is provided between the end of the rotating cylinder of the second connecting rod 106 and the housing.

[0040] The first driven bevel gear 111 and the second driven bevel gear 114 are coaxially arranged and located on both sides of the center line of the housing. The first driven bevel gear 111 is rotatably connected to the rotating shaft 112 through two bearings 113, and the second driven bevel gear 114 is rotatably connected to the rotating shaft 112 through two bearings 113.

[0041] The two ends of the rotating shaft 112 are fixedly connected to the housing by screws, thereby achieving the fixation between the rotating shaft and the housing.

[0042] Furthermore, a fourth shim 204 is provided between the opposing sides of the first driven bevel gear 111 and the second driven bevel gear 114 to avoid frictional damage at the mating surfaces of the first driven bevel gear 111 and the second driven bevel gear 114.

[0043] In this embodiment, the tail extension of the first blade 101, the first connecting rod 103, and the first driven bevel gear 111 form a four-bar linkage. The tail extension of the first blade 101 serves as the connecting rod portion of the four-bar linkage, and the remaining portion of the first blade 101 serves as the extension portion of the connecting rod portion.

[0044] The tail extension of the second blade 102, the second connecting rod 106, and the second driven bevel gear 114 form a four-bar linkage. The tail extension of the second blade 102 serves as the connecting rod portion of the four-bar linkage, and the remaining portion of the second blade 102 serves as an extension of the connecting rod portion.

[0045] The two four-bar linkages are arranged symmetrically with respect to the centerline of the housing.

[0046] The first driven bevel gear 111 and the second driven bevel gear 114 are connected to the drive assembly, which can drive the first driven bevel gear 111 and the second driven bevel gear 114 to rotate in opposite directions.

[0047] In this embodiment, the drive assembly includes a drive bevel gear 115, a first driven bevel gear 111 and a second driven bevel gear 114 located on both sides of the drive bevel gear 115 and meshing with the drive bevel gear 115. When the drive bevel gear 115 rotates, it can drive the first driven bevel gear 111 and the second driven bevel gear 114 to rotate in opposite directions.

[0048] The active bevel gear 115 is connected to a rotating drive unit located inside the housing. The rotating drive unit can drive the active bevel gear to rotate. In this embodiment, the rotating drive unit is a geared motor 116, which is fixed inside the housing. The output shaft of the geared motor 116 is connected to the active bevel gear 115.

[0049] The housing also contains a battery pack, preferably a lithium battery pack 117, which is connected to the motor via a power supply line to supply power to the motor.

[0050] Furthermore, to facilitate the use of the scissors, a handle is provided on the casing, and the power supply switch is located on the handle, making it convenient for staff to start or stop the motor.

[0051] The working principle of the handheld electric bamboo harvesting shears in this embodiment is as follows: The operator holds the electric bamboo harvesting shears of this embodiment, weds the bamboo pole with the arc-shaped cutting edge formed between the first blade 101 and the second blade 102, and pulls the switch. The reduction motor 116 drives the first driven bevel gear 111 and the second driven bevel gear 114 to rotate simultaneously through the driving bevel gear 115. The rotation directions of the first driven bevel gear 111 and the second driven bevel gear 114 are opposite. The first driven bevel gear 111, in conjunction with the first connecting rod 103, drives the first blade 101 to move. The second driven bevel gear 114, in conjunction with the second connecting rod 106, drives the second blade 102 to move. The first blade 101 and the second blade 102 translate in the direction of narrowing of the cutting edge, and the first blade 101 and the second blade 102 rotate in opposite directions. The first blade 101 and the second blade 102 first cut the bamboo pole at the contact point between the bamboo pole and the bottom of the cutting edge. The cut extends from the back of the bamboo pole along both sides to the front until the bamboo pole is cut off.

[0052] During the process of cutting bamboo stalks, the cutting contact line of the first blade 101 and the second blade 102 moves from the rear along both sides to the front, always maintaining a short cutting contact line length, which significantly reduces the cutting force compared with traditional bamboo harvesting shears; at the same time, since the two blades are always rotating relative to the bamboo stalk, the phenomenon of the cut jamming the blades is effectively prevented, thus improving harvesting efficiency.

[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A handheld electric bamboo harvesting shears, characterized in that, The device includes a housing, within which a drive assembly is housed. The drive assembly is connected to two blade assemblies symmetrically distributed relative to the centerline of the housing. Each blade assembly includes a blade, the outer end of the blade's tail extension is hinged to the inner end of a connecting rod, the outer end of the connecting rod is hinged to the housing, and the inner end of the blade's tail extension is hinged to the extension of a driven bevel gear. Two driven bevel gears are coaxially arranged and rotatably connected to the housing. The two bevel gears are connected to the drive assembly, which is capable of driving the two bevel gears to move in opposite directions. The tail extension of the first blade, the first connecting rod, and the first driven bevel gear form a four-bar linkage. The tail extension of the second blade, the second connecting rod, and the second driven bevel gear form a four-bar linkage. The two four-bar linkages are symmetrically arranged with respect to the centerline of the housing. The driven bevel gear adopts a sector-shaped structure. The central end of the sector-shaped structure is rotatably connected to the housing through a rotating shaft, and the central end of the sector-shaped structure is provided with an extension. The extension is hinged to the inner end of the extension section of the blade tail. The extension is eccentrically set relative to the center of the first driven bevel gear. The extension is provided with a U-shaped groove, and a hinge shaft is provided in the U-shaped groove. The tail extension of the blade extends into the U-shaped groove and the inner end of the tail extension is rotatably connected to the hinge shaft.

2. The handheld electric bamboo harvesting shears as described in claim 1, characterized in that, A gasket is provided between the tail extension of the blade and the groove surface of the U-shaped groove.

3. The handheld electric bamboo harvesting shears as described in claim 1, characterized in that, Washers are provided at the mating surfaces of the two driven bevel gears, with the two sides of the washers contacting the surfaces of the two driven bevel gears respectively.

4. The handheld electric bamboo harvesting shears as described in claim 1, characterized in that, The blade is an arc-shaped blade with a cutting edge on its inner arc edge. The end of the blade closest to the operator is the tail end, which has a tail extension section.

5. A handheld electric bamboo harvesting shears as described in claim 1, characterized in that, The connecting rod includes a first rod portion and a second rod portion arranged in parallel. A hinge shaft is provided between the inner ends of the first rod portion and the second rod portion. The outer end of the tail extension of the blade is rotatably connected to the hinge shaft. A rotating cylinder is provided between the outer ends of the first rod portion and the second rod portion. The rotating cylinder is rotatably connected to the housing through the hinge shaft.

6. A handheld electric bamboo harvesting shears as described in claim 5, characterized in that, A gasket is provided between the rotating drum and the inner side of the shell.

7. A handheld electric bamboo harvesting shears as described in claim 1, characterized in that, The drive assembly includes an active bevel gear and two driven bevel gears respectively disposed on both sides of the active bevel gear and meshing with the active bevel gear. The active bevel gear is connected to a rotating drive component disposed in the housing. The rotating drive component can drive the active bevel gear to rotate so that the two driven bevel gears rotate in opposite directions. The rotating drive component is connected to a battery pack fixed in the housing through a power supply line.

8. A handheld electric bamboo harvesting shears as described in claim 7, characterized in that, The housing is equipped with a handle, and the handle has a switch for the power supply line.

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