Adjustable high branch scissors

Abstract

The utility model belongs to the technical field of gardening tools, and particularly relates to an adjustable lopper which comprises an extension rod, a shearing head and a handle rod are arranged at the two ends of the extension rod respectively, a driving device is arranged on the handle rod, the shearing head comprises an installation base fixedly connected with the extension rod, a fixed blade is fixedly arranged on the installation base, and a fixed blade is arranged on the fixed blade. A movable blade is movably arranged on the mounting seat or the fixed blade, a first driving connecting rod and a second driving connecting rod are arranged on the mounting seat, the second driving connecting rod is rotationally arranged on the mounting seat, a transmission connecting rod is rotationally arranged in the extension rod, and the driving device can drive the transmission connecting rod to rotate in the extension rod; the extension rod is in sliding connection with the grip rod, a locking piece for controlling the extension rod and the grip rod to be relatively fixed is arranged on the grip rod, a first positioning part is arranged on the transmission connecting rod, and a second positioning part in sliding connection with the first positioning part is arranged on the driving device; the utility model aims to provide the adjustable lopper which is convenient and flexible to adjust and convenient for a user to use.

Description

Technical Field

[0001] This utility model belongs to the field of garden tool technology, and specifically relates to an adjustable high-branch shears. Background Technology

[0002] High-pole shears are devices used to clear branches and trunks at higher elevations. They typically have a shearing head, a long extension bar, and a handle, allowing users to clear branches and trunks from the ground.

[0003] Most high-pole shears on the market have their drive mechanism located on the shearing head, with a control switch and battery pack on the handle. The extension rod contains wires connecting the battery pack and the drive mechanism. For example, Chinese Utility Model Patent CN202221694936.5 discloses an electric high-pole shear, which includes a handle, a support rod located at the upper end of the handle, and electric shears mounted on the upper end of the support rod. The handle contains a battery for power supply, a switch, and a trigger for controlling the operation of the electric shears. The battery, switch, and trigger are electrically connected to the control circuit board inside the electric shears via wires that pass through the support rod. In use, the user holds the handle of the support column and turns on the switch to start the electric shears. Later, the user controls the operation of the electric shears by pulling the trigger, so as to electrically cut taller branches and other objects, and can cut thicker branches without the need to use a saw blade to cut the branches, which saves a lot of time and is extremely convenient to use. Since the wire is run through the support rod, it can avoid the wire being exposed and causing the branch to get tangled in the wire. In addition, the structure of this utility model is simple and extremely convenient to use.

[0004] In the above structure, since the electric shears are all located at one end of the support rod, the electric high-branch shears are relatively difficult to use, requiring frequent breaks from the user, which is inconvenient. Furthermore, because the support rod needs to be fitted with a wire, it is not convenient to extend, retract, or disassemble the support rod. During use, the distance between the handle and the electric shears is fixed, making it inconvenient for the user to prune branches with significant height differences, further complicating user experience. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide an adjustable high-branch shear that is convenient, flexible and easy for users to use.

[0006] The purpose of this utility model is achieved as follows:

[0007] An adjustable high-branch shear includes an extension rod with a shearing head and a handle at each end. A drive device is mounted on the handle. The shearing head includes a mounting base fixedly connected to the extension rod, a fixed blade fixedly mounted on the mounting base, and a movable blade movably mounted on the mounting base or the fixed blade. A first drive link and a second drive link are mounted on the mounting base. The second drive link is rotatably mounted on the mounting base. A transmission link is rotatably mounted in the extension rod. The drive device can drive the transmission link to rotate in the extension rod. The drive device can drive the second drive link to rotate via the transmission link. The rotating second drive link drives the movable blade to move via the first drive link, thereby allowing the movable blade and the fixed blade to shear items.

[0008] The extension rod is slidably connected to the handle rod. The handle rod is provided with a locking member that controls the extension rod and the handle rod to be relatively fixed. The transmission link is provided with a first positioning part, and the drive device is provided with a second positioning part that is slidably connected to the first positioning part. The extension rod and the handle rod are controlled to slide relative to each other. The first positioning part can be slidably connected to the second positioning part, thereby adjusting the relative distance between the handle rod and the shear head.

[0009] The present invention is further configured such that: the grip bar is provided with a mounting hole, one end of the extension bar is slidably disposed in the mounting hole, and a limiting wall is provided on the side wall of the mounting hole or at the end of the mounting hole; the extension bar is provided with a limiting protrusion adapted to the limiting part; the limiting wall can limit the movement range of the limiting protrusion, thereby limiting the extension range of the extension bar and the grip bar, and preventing the extension bar from separating from the grip bar.

[0010] The present invention is further configured such that: the output end of the driving device is provided with a connecting rod, the second positioning part is an irregular hole provided in the connecting rod, the first positioning part is slidably disposed in the second positioning part, and the connecting rod passes through the extension rod, and a support slider that is rotatably connected to the extension rod is provided on the connecting rod.

[0011] The present invention is further configured such that: a screw is provided at the output end of the drive device, and a threaded sleeve adapted to the screw is slidably provided on the handle bar. The screw can drive the threaded sleeve to slide on the handle bar, and a limiting guide groove is provided on the handle bar. A guide protrusion adapted to the limiting guide groove is provided on the threaded sleeve. The limiting guide groove and the guide protrusion cooperate to limit the sliding range of the threaded sleeve, thereby limiting the maximum rotation angle or number of rotations of the screw, the transmission connecting rod and the second drive connecting rod.

[0012] The present invention is further configured such that: the first driving link is slidably disposed on the mounting base, and the first driving link is threadedly connected to the second driving link; the transmission link can drive the second link to rotate, and the first driving link slides relative to the mounting base and drives the moving blade and the fixed blade to move relative to each other.

[0013] The present invention is further configured such that: an auxiliary connecting rod is rotatably provided on the first driving connecting rod, the moving blade is rotatably connected to the moving blade, and the auxiliary connecting rod is rotatably connected to the moving blade. The fixed blade, the moving blade, the auxiliary connecting rod and the first driving connecting rod form a differentiating slider mechanism. During the sliding process of the first driving connecting rod, the first driving connecting rod drives the moving blade to rotate through the auxiliary connecting rod.

[0014] The present invention is further configured such that: the extension rod includes a first rod body and a third rod body respectively connected to the shear head and the handle rod; a second rod body is disposed between the first rod body and the third rod body; the second rod body is detachably connected to both the first rod body and the third rod body; and the first rod body is detachably connected to the third rod body. The transmission linkage includes a first connecting rod, a second connecting rod, and a third connecting rod respectively rotatably disposed in the first rod body, the second rod body, and the third rod body; the first connecting rod, the second connecting rod, and the third connecting rod are detachably connected in sequence; a first positioning part is disposed on the third connecting rod; and the first connecting rod is detachably connected to the third connecting rod. After removing the second rod body and the second connecting rod, the first rod body is detachably connected to the third rod body, and the first connecting rod is detachably connected to the third connecting rod. The driving device can drive the second driving linkage to rotate through the first connecting rod and the third connecting rod.

[0015] The present invention is further configured such that: a first positioning slot is provided on the first connecting rod, a first positioning protrusion adapted to the first positioning slot is provided on the third connecting rod, and a second positioning slot and a second positioning protrusion are respectively provided at both ends of the second connecting rod, wherein the second positioning slot and the second positioning protrusion can respectively cooperate with the first positioning protrusion and the first positioning slot.

[0016] The present invention is further configured such that: both the first positioning protrusion and the second positioning protrusion are splines, and both the first positioning slot and the second positioning slot are spline grooves.

[0017] The present invention is further configured such that: a first connecting flange and a second connecting flange are respectively provided on the first rod and the second rod; a first locking sleeve is movably provided on the first rod; and a first connecting seat is fixedly provided on the third rod; when the first rod and the third rod are connected, the first locking sleeve is connected to the first connecting seat, and the first locking sleeve can drive the first connecting flange to press against the third rod and fix the first rod and the third rod relatively; and a second locking sleeve and a second connecting seat are respectively provided at both ends of the second rod, and the second locking sleeve and the second connecting seat can cooperate with the first connecting seat and the first locking sleeve respectively; when the first rod, the second rod and the third rod are connected, the first rod is inserted into the second connecting seat, and the first locking sleeve cooperates with the second connecting seat to drive the first connecting flange to press against the second rod and fix the first rod and the second rod relatively; the second rod is inserted into the first connecting seat, and the second locking sleeve cooperates with the first connecting seat to drive the second connecting flange to press against the third rod and fix the second rod and the third rod relatively.

[0018] The advantages of this utility model compared to the prior art are:

[0019] 1. In this utility model, the drive device is located on the handle, thereby reducing the weight of the shearing head. This makes using the high-pole shears less strenuous, reducing the need for frequent breaks and allowing for extended use. The transmission linkages are mechanically connected to both the drive device and the shearing head, preventing damage during use and facilitating disassembly and assembly, thus extending the lifespan of the high-pole shears. The sliding connection between the extension rod and the handle, as well as the sliding connection between the first and second positioning parts, allows the user to adjust the length of the extension rod, enabling the trimming of branches at different heights.

[0020] 2. The limiting wall and limiting protrusion in this utility model can prevent the extension rod from separating from the handle during adjustment, and prevent debris from entering the extension rod and handle, thus preventing damage to the high-pole shears. This helps extend the service life of the high-pole shears and makes it easier for users to adjust the relative distance between the shearing head and the handle. The sliding connection between the connecting rod and the first positioning part increases the extension length of the extension rod and handle, making it easier for users. The supporting slider can reduce or even prevent the deflection of the connecting rod during installation or use, facilitates the stable sliding of the first and second positioning parts, facilitates the transmission between the drive device and the transmission link, and helps reduce friction during the sliding process of the first and second positioning parts. The screw, threaded sleeve, limiting guide groove and guide protrusion can limit the movement range of the moving blade, preventing damage to the high-pole shears due to excessive movement of the moving blade. This structure also helps the screw rotate stably, reduces the shaking of the screw during use, and facilitates stable transmission between the drive device and the transmission link.

[0021] 3. In this utility model, the threaded connection between the first drive link and the second drive link facilitates the first drive link's drive of the moving blade. The threaded transmission saves effort in linear motion, which helps to reduce the load on the drive device during use. This allows the high-pole shears to cut branches with greater strength, which helps to improve the cutting effect of the high-pole shears and makes it convenient for users to use. The crank-slider mechanism has a simple structure, high transmission accuracy, and high transmission efficiency, which makes it easy for the first drive link to control the relative rotation of the moving blade and the moving blade.

[0022] 4. The detachable first, second, and third rods in this invention allow users to significantly adjust the distance between the shearing head and the handle. The detachable first, second, and third connecting rods facilitate the transmission between the drive unit and the second drive connecting rod after the second rod is disassembled or installed, enhancing user convenience. The first positioning slot, first positioning protrusion, second positioning slot, and second positioning protrusion facilitate quick disassembly and installation of the first, second, and third connecting rods. The plug-in structure reduces the impact of production or installation errors on the installation and fixation of the first, second, and third connecting rods, simplifying the assembly and use of the high-pole shears. The spline structure improves the reliability of the connection between the first, second, and third connecting rods, reduces wear on the transmission connecting rods, and increases transmission efficiency.

[0023] 5. The first locking sleeve, the first connecting seat, the second locking sleeve, and the second connecting seat in this utility model facilitate the disassembly and installation of the first rod body, the second rod body, and the third rod body. The first connecting flange and the second connecting flange facilitate the positioning and installation of the first rod body, the second rod body, and the third rod body, preventing the first rod body, the second rod body, and the third rod body from sliding or shaking relative to each other during use, thus making it convenient for users to use the high-branch shears. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is an exploded view of the present invention;

[0026] Figure 3 This is a cross-sectional view of the connection structure between the shear head and the first rod in this utility model;

[0027] Figure 4 This is a cross-sectional view of the connection structure between the third rod and the handle rod in this utility model;

[0028] Figure 5 This is a cross-sectional view of the connection structure between the second and third rods in this utility model;

[0029] Figure 6 This is an exploded view of the handle bar in this utility model;

[0030] Figure 7 This is one of the cross-sectional views of the handle bar in this utility model;

[0031] Figure 8 This is the second sectional view of the handle bar in this utility model;

[0032] Figure 9 This is a schematic diagram of the structure of the first half-shell in this utility model;

[0033] Figure 10This is a schematic diagram of the structure of the second half-shell in this utility model;

[0034] Figure 11 This is an exploded view of the extension rod in this utility model;

[0035] Figure 12 This is an exploded view of the transmission connecting rod in this utility model.

[0036] The labels in the diagram mean: 1-Shearing head; 11-Mounting base; 12-Fixed blade; 13-Moving blade; 14-Auxiliary connecting rod; 15-First drive connecting rod; 16-Second drive connecting rod; 151-Threaded hole; 161-Mounting rod; 162-Mounting groove; 163-Support slider; 164-First threaded part; 2-Handle rod; 21-Mounting hole; 22-Second threaded part; 23-Deformable part; 24-Threaded sleeve; 25-Limiting wall; 26-First half-shell; 27-Limiting guide groove;

[0037] 28-Second half-shell; 29-Sliding tube; 241-Guide protrusion; 242-Roller; 3-Extension rod; 31-First rod body; 32-Second rod body; 33-Third rod body; 311-First connecting flange; 312-Insertion protrusion; 313-Rotating cavity; 321-Second connecting seat; 322-Second connecting flange; 323-Insertion groove; 331-First connecting seat;

[0038] 332 - Limiting flange; 4 - Transmission link; 41 - First link; 42 - Second link; 43 - Third link; 411 - First positioning slot; 421 - Second positioning slot; 422 - Second positioning protrusion;

[0039] 431 - First positioning protrusion; 5 - First locking sleeve; 51 - Second locking sleeve; 6 - Drive device;

[0040] 61-Planetary gear set; 62-Connecting rod; 63-Second positioning part; 64-Screw member; 7-Locking member. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0042] See Figures 1 to 12As shown, an adjustable high-branch shear includes an extension rod 3, with a shearing head 1 and a handle 2 at each end of the extension rod 3. A drive device 6 is mounted on the handle 2. The shearing head 1 includes a mounting base 11 fixedly connected to the extension rod 3. A fixed blade 12 is fixedly mounted on the mounting base 11, and a movable blade 13 is movably mounted on the mounting base 11 or the fixed blade 12. A first drive link 15 and a second drive link 16 are mounted on the mounting base 11. The second drive link 16 is rotatably mounted on the mounting base 11. A transmission link 4 is rotatably mounted in the extension rod 3. The drive device 6 can drive the transmission link 4 to rotate in the extension rod 3. The drive device 6 can drive the first drive link 15 through the transmission link 4. The second drive linkage 16 rotates, and the rotating second drive linkage 16 drives the moving blade 13 to move through the first drive linkage 15, so that the moving blade 13 and the fixed blade 12 can cut the object. In this structure, the drive device 6 is set on the handle 2, thereby reducing the weight of the shearing head 1. The high-pole shears are easier to use, and the user does not need to take frequent breaks. This makes it easier for the user to use the high-pole shears for a long time. In addition, in this structure, the transmission linkage 4 is mechanically connected to the drive device 6 and the shearing head 1 respectively. It is not easy to be damaged during use and is easy for the user to disassemble and assemble, which helps to extend the service life of the high-pole shears and facilitates the assembly, disassembly and maintenance of the high-pole shears.

[0043] The extension rod 3 is slidably connected to the handle rod 2. The handle rod 2 is provided with a locking member 7 to control the relative fixation of the extension rod 3 and the handle rod 2. The transmission link 4 is provided with a first positioning part, and the drive device 6 is provided with a second positioning part 63 that is slidably connected to the first positioning part. The extension rod 3 and the handle rod 2 are slidably connected, and the first positioning part can be slidably connected to the second positioning part 63, thereby adjusting the relative distance between the handle rod 2 and the cutting head 1. The slidably connected extension rod 3 and handle rod 2, as well as the slidably connected first positioning part and second positioning part 63, make it convenient for the user to adjust the length of the extension rod 3, making it convenient for the user to prune branches of different heights and making it convenient for the user to use.

[0044] In this embodiment, the grip bar 2 is provided with a second threaded portion 22 and a deformable portion 23. The locking member 7 is threadedly connected to the grip bar 2, and the locking member 7 drives the deformable portion 23 to press against the extension rod 3 and fix the extension rod 3 relative to the grip bar 2.

[0045] The handle 2 is provided with a mounting hole 21. One end of the extension rod 3 is slidably disposed in the mounting hole 21. A limiting wall 25 is provided on the side wall or end of the mounting hole 21. The extension rod 3 is provided with a limiting protrusion 332 adapted to the limiting part. The limiting wall 25 can limit the movement range of the limiting protrusion 332, thereby limiting the extension range of the extension rod 3 and the handle 2 and preventing the extension rod 3 from separating from the handle 2. The setting of the limiting wall 25 and the limiting protrusion 332 can prevent the extension rod 3 from separating from the handle 2 during the adjustment process, prevent foreign objects from entering the extension rod 3 and the handle 2 and causing damage to the high-pole shears, which is conducive to extending the service life of the high-pole shears. It also makes it convenient for the user to adjust the relative distance between the shearing head 1 and the handle 2, making it convenient for the user to use.

[0046] In this embodiment, the grip bar 2 includes two detachably connected first half-shells 26. A drive device 6 is disposed between the two first half-shells 26. A sliding tube 29 is fixedly disposed between the two first half-shells 26. A mounting hole 21 is disposed in the sliding tube 29. Two second half-shells 28 are detachably disposed on the sliding tube 29. A second threaded part 22 and a deformable part 23 are both disposed on the second half-shells 28. Limiting walls 25 are provided on both the first half-shells 26 and the second half-shells 28. The limiting walls 25 pass through the mounting hole 21. The limiting walls 25 on the first half-shells 26 and the second half-shells 28 are respectively disposed on both sides of the limiting protrusion 332 to limit the movement range of the limiting protrusion 332, thereby limiting the extension range of the extension bar 3 and the grip bar 2.

[0047] In this invention, the output end of the drive device 6 is provided with a connecting rod 62, and the second positioning part 63 is an irregular hole provided in the connecting rod 62. The first positioning part is slidably disposed in the second positioning part 63, and the connecting rod 62 passes through the extension rod 3. The extension rod 3 is provided with a rotating cavity 313, and the connecting rod 62 is provided with a support slider 163 that is rotatably connected to the rotating cavity 313. The slidably connected connecting rod 62 and the first positioning part help to increase the extension length of the extension rod 3 and the handle 2, making it convenient for the user. The setting of the support slider 163 can reduce or even avoid the deflection of the connecting rod 62 during installation or use, facilitate the stable sliding of the first positioning part and the second positioning part 63, facilitate the transmission between the drive device 6 and the transmission link 4, and help reduce the friction during the sliding process of the first positioning part and the second positioning part 63.

[0048] The output end of the drive device 6 is provided with a screw 64, and a threaded sleeve 24 adapted to the screw 64 is slidably provided on the handle 2. The screw 64 can drive the threaded sleeve 24 to slide on the handle 2. The handle 2 is provided with a limiting guide groove 27, and the threaded sleeve 24 is provided with a guide protrusion 241 adapted to the limiting guide groove 27. The limiting guide groove 27 and the guide protrusion 241 cooperate to limit the sliding range of the threaded sleeve 24, thereby limiting the maximum rotation angle or number of rotations of the screw 64, the transmission link 4, and the second drive link 16. This structure can limit the movement range of the moving blade 13, avoid damage to the high branch shears due to excessive movement range of the moving blade 13, and this structure is conducive to the stable rotation of the screw 64, reducing the shaking of the screw 64 during use, and is conducive to the stable transmission between the drive device 6 and the transmission link 4. In this embodiment, a roller 242 is rotatably provided on the outer periphery of the guide protrusion 241, and the roller 242 is adapted to the limiting guide groove 27.

[0049] In this embodiment, the driving device 6 is connected to a planetary gear set 61. The driving device 6 drives the screw 64 and the connecting rod 62 to rotate through the planetary gear set 61. The screw 64 is sleeved on the connecting rod 62 and fixed relative to the connecting rod 62.

[0050] The first drive link 15 is slidably mounted on the mounting base 11, and the first drive link 15 is threadedly connected to the second drive link 16. The transmission link 4 can drive the second link 42 to rotate. The first drive link 15 slides relative to the mounting base 11 and drives the moving blade 13 to move relative to the fixed blade 12. The threaded connection between the first drive link 15 and the second drive link 16 facilitates the first drive link 15 to drive the moving blade 13. Moreover, the threaded transmission saves effort in linear motion, which helps to reduce the load on the drive device 6 during use, allowing the high-branch shears to cut branches with greater strength, which helps to improve the cutting effect of the high-branch shears and makes it convenient for users to use.

[0051] The first drive link 15 is provided with a threaded hole 151, and the second drive link 16 is provided with a first threaded portion 164 that is adapted to the threaded hole 151.

[0052] In this invention, a groove can be provided on the movable blade 13. The first driving link 15 moves in the groove and can drive the movable blade 13 to move relative to the fixed blade 12. In this embodiment, an auxiliary link 14 is rotatably provided on the first driving link 15. The movable blade 13 is rotatably connected to the fixed blade 13, and the auxiliary link 14 is rotatably connected to the movable blade 13. The fixed blade 12, the movable blade 13, the auxiliary link 14, and the first driving link 15 form a differentiating slider mechanism. During the sliding process of the first driving link 15, the first driving link 15 drives the movable blade 13 to rotate through the auxiliary link 14. The crank-slider mechanism has a simple structure, high transmission accuracy, and high transmission efficiency, and is convenient for the first driving link 15 to control the relative rotation of the movable blade 13.

[0053] The extension rod 3 includes a first rod body 31 and a third rod body 33 respectively connected to the shear head 1 and the handle rod 2. A second rod body 32 is disposed between the first rod body 31 and the third rod body 33. The second rod body 32 is detachably connected to both the first rod body 31 and the third rod body 33, and the first rod body 31 is detachably connected to the third rod body 33. The transmission connecting rod 4 includes a first connecting rod 41, a second connecting rod 42, and a third connecting rod 43 respectively rotatably disposed in the first rod body 31, the second rod body 32, and the third rod body 33. The first connecting rod 41, the second connecting rod 42, and the third connecting rod 43 are detachably connected in sequence. A first positioning part is disposed on the third connecting rod 43, and the first connecting rod 41 is detachable from the third connecting rod 43. The third link 43 is detachably connected; after removing the second rod 32 and the second link 42, the first rod 31 and the third rod 33 are detachably connected, and the first link 41 and the third link 43 are detachably connected. The drive device 6 can drive the second drive link 16 to rotate through the first link 41 and the third link 43. The detachable connection of the first rod 31, the second rod 32 and the third rod 33 makes it easy for the user to adjust the distance between the shear head 1 and the handle 2. The detachable connection of the first link 41, the second link 42 and the third link 43 facilitates the transmission between the drive device 6 and the second drive link 16 after the second rod 32 is removed or installed, making it convenient for the user.

[0054] In this embodiment, the second drive link 16 is provided with a mounting rod 161, and the mounting rod 161 is provided with a mounting groove 162 that is adapted to the first rod body 31. The first rod body 31 can slide along the length direction of the mounting groove 162, and the first rod body 31 can drive the second drive link 16 to rotate through the mounting groove 162.

[0055] In this utility model, the first connecting rod 41 is provided with a first positioning slot 411, the third connecting rod 43 is provided with a first positioning protrusion 431 adapted to the first positioning slot 411, and the two ends of the second connecting rod 42 are respectively provided with a second positioning slot 421 and a second positioning protrusion 422. The second positioning slot 421 and the second positioning protrusion 422 can cooperate with the first positioning protrusion 431 and the first positioning slot 411 respectively. The arrangement of the first positioning slot 411, the first positioning protrusion 431, the second positioning slot 421 and the second positioning protrusion 422 facilitates the quick disassembly and installation of the first connecting rod 41, the second connecting rod 42 and the third connecting rod 43. Moreover, the plug-in structure can reduce the impact of production errors or installation errors on the installation and fixation of the first connecting rod 41, the second connecting rod 42 and the third connecting rod 43, and facilitate the assembly and use of the high-branch shears.

[0056] Preferably, the first positioning protrusion 431 and the second positioning protrusion 422 are both splines, and the first positioning slot 411 and the second positioning slot 421 are both spline grooves. The spline structure is beneficial to improving the connection reliability of the first connecting rod 41, the second connecting rod 42 and the third connecting rod 43, is beneficial to the wear of the transmission connecting rod 4, and improves the transmission efficiency.

[0057] The first rod 31 and the second rod 32 are respectively provided with a first connecting flange 311 and a second connecting flange 322. The first rod 31 is movably provided with a first locking sleeve 5, and the third rod 33 is fixedly provided with a first connecting seat 331. When the first rod 31 and the third rod 33 are connected, the first locking sleeve 5 is connected with the first connecting seat 331. The first locking sleeve 5 can drive the first connecting flange 311 to press against the third rod 33 and fix the first rod 31 and the third rod 33 relatively. The second rod 32 is provided with a second locking sleeve 51 and a second connecting seat 321 at both ends. The second locking sleeve 51 and the second connecting seat 321 can cooperate with the first connecting seat 331 and the first locking sleeve 5, respectively. When the first rod 31, the second rod 32 and the third rod 33 are connected, the first rod 31 is inserted into the second connecting seat 321, and the first locking sleeve 5 cooperates with the second connecting seat 321 to lock the first rod 31. The first connecting flange 311 is driven by sleeve 5 to press against the second rod 32, thus fixing the first rod 31 and the second rod 32 relative to each other. The second rod 32 is inserted into the first connecting seat 331. The second locking sleeve 51 cooperates with the first connecting seat 331 to drive the second connecting flange 322 to press against the third rod 33, thus fixing the second rod 32 and the third rod 33 relative to each other. In this structure, the first locking sleeve 5, the first connecting seat 331, the second locking sleeve 51 and the second connecting seat 321 are arranged to facilitate the disassembly and installation of the first rod 31, the second rod 32 and the third rod 33. The arrangement of the first connecting flange 311 and the second connecting flange 322 facilitates the positioning and installation of the first rod 31, the second rod 32 and the third rod 33, and avoids the relative sliding or shaking of the first rod 31, the second rod 32 and the third rod 33 during use, making it convenient for users to use the high-branch shears.

[0058] In this embodiment, the first locking sleeve 5 is threadedly connected to the first connecting seat 331, and the second locking sleeve 51 and the second connecting seat 321 are threadedly connected. The first connecting flange 311 and the second connecting flange 322 are both provided with insertion protrusions 312, which extend along the length of the extension rod 3. The first connecting seat 331 and the second connecting seat 321 are both provided with insertion grooves 323 that are adapted to the insertion protrusions 312. This structure can prevent the first rod 31, the second rod 32 and the third rod 33 from rotating relative to each other during use.

[0059] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. An adjustable long-reach pruner comprising an elongated pole (3) having a pruner head (1) and a handlebar (2) at each end, characterized in that: The handle rod (2) is provided with a driving device (6), the cutting head (1) comprises a mounting seat (11) fixedly connected with the extension rod (3), the mounting seat (11) is fixedly provided with a fixed blade (12), the mounting seat (11) or the fixed blade (12) is movably provided with a movable blade (13), the mounting seat (11) is provided with a first driving connecting rod (15) and a second driving connecting rod (16), the second driving connecting rod (16) is rotatably arranged on the mounting seat (11), the extension rod (3) is rotatably provided with a transmission connecting rod (4), the driving device (6) can drive the transmission connecting rod (4) to rotate in the extension rod (3), the driving device (6) can drive the second driving connecting rod (16) to rotate through the transmission connecting rod (4), the second driving connecting rod (16) drives the movable blade (13) to move through the first driving connecting rod (15), so that the movable blade (13) and the fixed blade (12) can cut the object. The extension rod (3) is slidably connected with the handle rod (2), the handle rod (2) is provided with a locking piece (7) for controlling the relative fixation of the extension rod (3) and the handle rod (2), the transmission connecting rod (4) is provided with a first positioning portion, and the driving device (6) is provided with a second positioning portion (63) slidably connected with the first positioning portion; the relative sliding of the extension rod (3) and the handle rod (2) is controlled, the first positioning portion is slidably connected with the second positioning portion (63), so that the relative distance between the handle rod (2) and the cutting head (1) is adjusted.

2. An adjustable pruner according to claim 1, wherein: The handle rod (2) is provided with a mounting hole (21), one end of the extension rod (3) is slidably arranged in the mounting hole (21), a limiting wall (25) is arranged on the side wall of the mounting hole (21) or the end of the mounting hole (21), the extension rod (3) is provided with a limiting convex edge (332) matched with the limiting wall (25), the limiting wall (25) can limit the movement range of the limiting convex edge (332), so as to limit the telescopic range of the extension rod (3) and the handle rod (2), and avoid the disconnection of the extension rod (3) and the handle rod (2).

3. An adjustable pruner according to claim 1, wherein: The output end of the driving device (6) is provided with a connecting rod (62), the second positioning portion (63) is a special-shaped hole arranged in the connecting rod (62), the first positioning portion is slidably arranged in the second positioning portion (63), and the connecting rod (62) is arranged in the extension rod (3), and the connecting rod (62) is provided with a supporting sliding block (163) rotatably connected with the extension rod (3).

4. An adjustable pruner according to claim 1, wherein: The output end of the driving device (6) is provided with a screw rod (64), the handle rod (2) is slidably provided with a threaded sleeve (24) matched with the screw rod (64), the screw rod (64) can drive the threaded sleeve (24) to slide on the handle rod (2), the handle rod (2) is provided with a limiting guide groove (27), the threaded sleeve (24) is provided with a guide convex (241) matched with the limiting guide groove (27), and the limiting guide groove (27) and the guide convex (241) cooperate to limit the sliding range of the threaded sleeve (24), so as to limit the maximum rotation angle or the number of rotation circles of the screw rod (64), the transmission connecting rod (4) and the second driving connecting rod (16).

5. An adjustable pruner according to claim 1, wherein: The first driving link (15) is slidably arranged on the mounting base (11), and the first driving link (15) is threadedly connected with the second driving link (16); the transmission link (4) can drive the second link (42) to rotate, the first driving link (15) is relatively slid on the mounting base (11) and drives the movable blade (13) to move relative to the fixed blade (12).

6. An adjustable pruner according to claim 5, wherein: The first driving link (15) is rotatably arranged with an auxiliary link (14), the movable blade (13) is rotatably connected with the movable blade (13), the auxiliary link (14) is rotatably connected with the movable blade (13), the fixed blade (12), the movable blade (13), the auxiliary link (14) and the first driving link (15) form a differential slider mechanism, and in the sliding process of the first driving link (15), the first driving link (15) drives the movable blade (13) to rotate through the auxiliary link (14).

7. An adjustable pruner according to claim 1, wherein: The extension rod (3) comprises a first rod body (31) and a third rod body (33) connected with the shearing head (1) and the handle rod (2) respectively, a second rod body (32) is arranged between the first rod body (31) and the third rod body (33), the second rod body (32) is detachably connected with the first rod body (31) and the third rod body (33) respectively, and the first rod body (31) is detachably connected with the third rod body (33), the transmission link (4) comprises a first link (41), a second link (42) and a third link (43) rotatably arranged in the first rod body (31), the second rod body (32) and the third rod body (33) respectively, the first link (41), the second link (42) and the third link (43) are detachably connected in sequence, the first positioning portion is arranged on the third link (43), and the first link (41) is detachably connected with the third link (43); after the second rod body (32) and the second link (42) are removed, the first rod body (31) is detachably connected with the third rod body (33), the first link (41) is detachably connected with the third link (43), and the driving device (6) can drive the second driving link (16) to rotate through the first link (41) and the third link (43).

8. An adjustable pruner according to claim 7, wherein: The first link (41) is provided with a first positioning slot (411), the third link (43) is provided with a first positioning protrusion (431) matched with the first positioning slot (411), and the second link (42) is provided with a second positioning slot (421) and a second positioning protrusion (422) at two ends respectively, the second positioning slot (421) and the second positioning protrusion (422) can be matched with the first positioning protrusion (431) and the first positioning slot (411) respectively.

9. An adjustable pruner according to claim 8, wherein: The first positioning protrusion (431) and the second positioning protrusion (422) are both splines, and the first positioning slot (411) and the second positioning slot (421) are both spline grooves.

10. An adjustable pruner according to claim 7, wherein: The first rod body (31) and the second rod body (32) are respectively provided with a first connecting protrusion (311) and a second connecting protrusion (322), the first rod body (31) is movably provided with a first locking sleeve (5), and the third rod body (33) is fixedly provided with a first connecting seat (331); when the first rod body (31) is connected with the third rod body (33), the first locking sleeve (5) is connected with the first connecting seat (331), the first locking sleeve (5) can drive the first connecting protrusion (311) to abut against the third rod body (33) and relatively fix the first rod body (31) and the third rod body (33); and the second rod body (32) is respectively provided with a second locking sleeve (51) and a second connecting seat (321) at two ends, the second locking sleeve (51) and the second connecting seat (321) can be matched with the first connecting seat (331) and the first locking sleeve (5) respectively, when the first rod body (31), the second rod body (32) and the third rod body (33) are connected, the first locking sleeve (5) is matched with the second connecting seat (321) to drive the first locking sleeve (5) to drive the first connecting protrusion (311) to abut against the second rod body (32), and relatively fix the first rod body (31) and the second rod body (32); the second locking sleeve (51) is matched with the first connecting seat (331) to drive the second locking sleeve (51) to drive the second connecting protrusion (322) to abut against the third rod body (33), and relatively fix the second rod body (32) and the third rod body (33).

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