Handheld electric garden scissors

Abstract

The pair of handheld electric garden scissors comprises a first gear and a second gear which are meshed with each other, the eccentric position of the first gear is hinged to one end of a first connecting rod, the eccentric position of the second gear is hinged to one end of a third connecting rod, and first pin shafts are arranged at the outer ends of the second connecting rod and a fourth connecting rod; the middle of the second connecting rod, the middle of the fourth connecting rod and the end, close to the cutting edge, of the bottom end of the first blade are hinged to a second pin shaft, the second pin shaft is connected with the box body, and a third pin shaft is arranged between the inner ends of the second connecting rod and the fourth connecting rod. The third pin shaft is hinged to the end, close to the cutting edge, of the bottom end of the second blade, the end, away from the cutting edge, of the bottom end of the second blade is hinged to the other end of the third connecting rod, and the first gear or the second gear is connected with a rotation driving mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of garden scissors, in particular to a pair of handheld electric garden scissors. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Handheld electric garden shears are a widely used tool for pruning fruit trees, ornamental trees, and gardens. Existing handheld electric garden shears are primarily composed of a high-speed DC motor, a large-ratio reduction mechanism, a shearing head, a control panel, and a battery pack. The shearing head consists of two blades mounted directly on the housing, with the fixed blade rigidly connected to the housing and the movable blade pivotally hinged to the housing. When shearing branches, the contact line between the movable blade and the branch continues to grow, and the shearing force becomes increasingly greater. When pruning thicker or harder branches, the blade often becomes stuck in the branch cut. At this point, the operator needs to release the shears switch, rotate the shears around the branch to a certain angle, and then continue shearing. Particularly thick and hard branches may require several rotations before being cut, severely impacting tree pruning efficiency. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a handheld electric garden shears, which reduces the risk of blades getting stuck in branch cuts and improves pruning efficiency.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: An embodiment of the present invention provides a handheld electric garden shears, comprising a first gear and a second gear meshing with each other, the first gear being hinged to one end of a first connecting rod at an eccentric position, the second gear being hinged to one end of a third connecting rod at an eccentric position, a first pin being provided between the outer ends of the second connecting rod and the fourth connecting rod, the other end of the first connecting rod and the end of the bottom end of the first blade away from the blade being rotatably connected to the first pin, the middle part of the second connecting rod and the fourth connecting rod and the end of the bottom end of the first blade close to the blade being hinged to the second pin, the second pin being connected to a box, a third pin being provided between the inner ends of the second connecting rod and the fourth connecting rod, the third pin being hinged to the end of the bottom end of the second blade close to the blade, the end of the bottom end of the second blade away from the blade being hinged to the other end of the third connecting rod, and the first gear or the second gear being connected to a rotation drive mechanism.

[0006] Optionally, the first gear and the second gear are rotatably connected to the box.

[0007] Optionally, the rotation drive mechanism includes a transmission assembly. When the first gear is connected to the rotation drive mechanism, the transmission assembly is connected to the first gear. When the second gear is connected to the rotation drive mechanism, the transmission assembly is connected to the second gear. The transmission assembly is connected to the power assembly. The power assembly is installed inside the shell, and the shell is fixed to the box.

[0008] Optionally, the transmission assembly adopts a bevel gear transmission mechanism, the power assembly adopts a motor installed in the housing, and the output shaft of the motor is connected to the input end of the bevel gear transmission mechanism.

[0009] Optionally, a battery pack is further provided in the shell, and the battery pack is connected to the power component to supply power to the power component.

[0010] Optionally, a bushing is provided between the first connecting rod, the end portion of the bottom end of the first blade facing away from the blade, and the first pin.

[0011] Optionally, a shaft sleeve is provided between the second pin shaft and the second connecting rod, the fourth connecting rod and the end portion of the bottom end of the first blade close to the blade.

[0012] Optionally, a shaft sleeve is provided between the third pin and the end portion of the bottom end of the second blade close to the blade.

[0013] Optionally, a gasket is provided between the first connecting rod, the second connecting rod and the first blade, and a gasket is provided between the second blade and the end of the third connecting rod.

[0014] Optionally, the first gear and the second gear each include a gear portion, the gear portion is coaxially connected to a journal portion, and the gear portions of the first gear and the second gear are meshed with each other; The eccentric portion of the shaft neck of the first gear is provided with a first U-shaped notch, and the end of the first connecting rod extends into the first U-shaped notch and is hinged to the eccentric portion of the shaft neck of the first gear; The eccentric portion of the shaft neck of the second gear is provided with a second U-shaped notch, and the end of the third connecting rod extends into the second U-shaped notch and is hinged to the eccentric portion of the shaft neck of the second gear.

[0015] The beneficial effects of the present invention are as follows: The handheld electric garden shears of the present invention have a third pin shaft provided between the inner ends of the second connecting rod and the fourth connecting rod, and the third pin shaft is hinged to the end of the bottom end of the second blade close to the blade. When the first gear and the second gear rotate in opposite directions, the first gear drives the first blade to rotate around the second pin shaft through the first connecting rod and the second connecting rod, and the second gear drives the second blade to rotate around the third pin shaft through the third connecting rod, and the rotation direction is opposite to the rotation direction of the first blade, so that the branches can be cut. When the second blade rotates, since the third pin shaft moves with the second connecting rod and the fourth connecting rod, the first blade and the second blade perform a closing motion again to reduce the blade edge. At the same time, the cutting edges of the first blade and the second blade can also produce a relatively obvious staggered motion, which can prevent the first blade and the second blade from being stuck by the incision of the branch, which is conducive to pruning thicker and harder branches. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing and box body of Example 1 of the present invention; Figure 3 This invention Figure 2 A-direction cross-sectional diagram; Figure 4 This invention Figure 2 Schematic diagram of the B-direction cross section; Figure 5 This invention Figure 2 Schematic diagram of the C-section; Among them, 1. housing, 2. battery pack, 3. power assembly, 4. blade motion drive mechanism, 5. trimming mechanism; 401. Second bevel gear, 402. First bevel gear, 403. First gear, 404. Bearing, 405. Fifth pin, 406. First connecting rod, 407. First pin, 408. Second connecting rod, 409. Second gear, 410. Sixth pin, 411. Third connecting rod, 412. Fourth pin, 413. Third pin, 414. Second pin, 415. First case cover, 416. Second case cover, 417. Sixth bushing, 418. Second bushing, 419. Gasket, 420. Fourth bushing, 421. Third bushing, 422. Fourth connecting rod, 423. Fifth bushing; 501. First blade, 502. Second blade. DETAILED DESCRIPTION

[0018] In this embodiment, the bottom ends of the first blade and the second blade refer to the ends of the first blade and the second blade close to the operator.

[0019] Example 1 This embodiment provides a handheld electric garden shears, such as Figure 1-Figure 5 As shown, it includes a housing 1, with a box fixed inside one end of the housing. The box is provided with a blade motion drive mechanism 4, which is connected to a trimming mechanism 5. The trimming mechanism 5 includes a first blade 501 and a second blade 502. The blade motion drive mechanism 4 can drive the first blade 501 and the second blade 502 to open and close while simultaneously staggering the first blade 501 and the second blade 502 to prevent the first blade 501 and the second blade 502 from being stuck in the cut of the branch. A power assembly 3 is provided in the housing, which is connected to the blade motion drive mechanism 4. The power assembly 3 is used to provide power to the blade motion drive mechanism 4 to drive the blade motion drive mechanism to operate. A battery pack 2 is also provided in the housing 1 for powering the power assembly 3.

[0020] The setting position of the shell 1 is provided with a wave-shaped structure, and the staff holds the wave-shaped structure position when using it, which meets the demand for comfortable use.

[0021] The blade movement drive mechanism 4 includes a first gear 403, a second gear 409, a first connecting rod 406, a second connecting rod 408, a third connecting rod 411, a fourth connecting rod 422, a transmission assembly, etc. The first gear 403 is meshed with the second gear 409, and the first gear 403 is connected to the power assembly 3 through the transmission assembly. The power assembly 3 can drive the first gear 403 to rotate through the transmission assembly. Under the meshing action of the first gear 403 and the second gear 409, the first gear 403 and the second gear 409 rotate in opposite directions.

[0022] In this embodiment, the first gear and the second gear 403 and 409 both include a gear portion and a shaft neck. The gear portion is coaxially arranged at one end of the shaft neck. The gear portions of the first gear 403 and the second gear 409 adopt a spur gear structure and mesh with each other.

[0023] The first gear 403 and the second gear 409 are both coaxially fixed on the gear shaft. Both ends of the gear shaft are rotatably connected to the housing through bearings 404, so that the first gear 403 and the second gear 409 can rotate around their own axes.

[0024] A first pin shaft 407 is provided between the outer ends of the second connecting rod 408 and the fourth connecting rod 422. Specifically, a limit block is provided at one end of the first pin shaft 407, and the limit block is embedded in the limit groove provided at the end of the second connecting rod 408 to prevent relative rotation between the first pin shaft 407 and the second connecting rod 408. The other end of the first pin shaft 407 is fixedly connected to the outer end of the fourth connecting rod 422 by a screw, thereby achieving the first pin shaft 407 being fixed between the outer ends of the second connecting rod 408 and the fourth connecting rod 422.

[0025] One end of the first connecting rod 406 and the end of the bottom end of the first blade 501 away from the blade are rotatably connected to the first pin 407. Preferably, a first sleeve is provided between the first connecting rod 406 and the end of the bottom end of the first blade 501 away from the blade and the first pin, and gaskets are provided on both sides of the first connecting rod 406 and between the second connecting rod 408 and the first blade 501 respectively, and a gasket is provided between the first blade 501 and the fourth connecting rod 422. The gasket can reduce the friction force on the first connecting rod 406 and the first blade 501 during movement.

[0026] A second pin 414 passes through the middle part of the second connecting rod 408, the fourth connecting rod 422 and the end of the bottom end of the first blade 501 close to the blade. The second pin 414 is connected to the box body. In this embodiment, the box body is assembled by the first box cover 415 and the second box cover 416. One end of the second pin 414 is connected to the first box cover 415, and the other end is connected to the second box cover 416.

[0027] Specifically, a limit block is provided at one end of the second pin shaft 414 , and the limit block is embedded in a limit groove provided in the first box cover 415 , and the other end of the second pin shaft 414 is fixed to the second box cover 416 by a screw.

[0028] Specifically, a limit block is provided at one end of the second pin shaft 414, and the limit block is embedded in the limit groove provided in the first box cover 415 to prevent relative rotation between the second pin shaft 414 and the box body. The other end of the second pin shaft 414 is fixedly connected to the second box cover 416 by a screw.

[0029] The middle positions of the second connecting rod 408 and the fourth connecting rod 422 and the end of the bottom end of the first blade 501 close to the blade are rotatably connected to the second pin 414, and a second sleeve 418 is provided between the second connecting rod 408, the fourth connecting rod 422, the first blade 501 and the second pin 414.

[0030] Furthermore, gaskets are provided between the first box cover 415 and the first blade 501 on both sides of the middle portion of the second connecting rod 408 , and a gasket is provided between the middle portion of the fourth connecting rod 422 and the first blade 501 .

[0031] Since the first blade 501 and the second connecting rod 408 and the fourth connecting rod 422 are connected at two positions, no relative movement can occur between the first blade 501 and the second connecting rod 408 and the fourth connecting rod 422, which is equivalent to a fixed connection.

[0032] A third pin shaft 413 is provided between the inner ends of the second connecting rod 408 and the fourth connecting rod 422. Specifically, a limit block is provided at one end of the third pin shaft 413, and the limit block is embedded in the limit groove provided at the end of the second connecting rod 408 to prevent relative rotation between the third pin shaft 413 and the second connecting rod 408. The other end of the third pin shaft 413 is fixedly connected to the inner end portion of the fourth connecting rod 422 by a screw.

[0033] The end of the bottom end of the second blade 502 close to the blade is rotatably connected to the third pin shaft 413, and a third sleeve 421 is provided between the end of the bottom end of the second blade 502 close to the blade and the third pin shaft 413, and gaskets are provided between both sides of the end of the second blade 502 close to the blade and the inner ends of the second connecting rod 408 and the fourth connecting rod 422.

[0034] One end of the third connecting rod 411 is hinged to the end of the bottom end of the second blade 502 away from the blade. Specifically, a U-shaped groove is provided at the end of the third connecting rod 411, and a fourth pin 412 is provided in the U-shaped groove. The end of the bottom end of the second blade 502 away from the blade is rotatably connected to the fourth pin 412 and a fourth shaft sleeve 420 is provided between the fourth pin.

[0035] Gaskets 419 are provided between the two sides of the bottom end of the second blade 502 away from the blade edge and the groove surface of the U-shaped groove to reduce friction.

[0036] The journal section of the first gear 403 is provided with an eccentric part, the eccentric part is provided with a U-shaped notch, and a fifth pin shaft 405 is provided in the U-shaped notch. A limit block is provided at one end of the fifth pin shaft 405, and the limit block is embedded in the limit groove provided in the gear part of the first gear 403. The other end is fixedly connected to the eccentric part by a screw. The other end of the first connecting rod 406 is rotatably connected to the fifth pin shaft 405 and a fifth shaft sleeve 423 is provided between the fifth pin shaft 405. Gaskets are provided between both sides of the first connecting rod 406 and the side surfaces of the U-shaped notch to reduce friction.

[0037] The journal section of the second gear 409 is provided with an eccentric part, the eccentric part is provided with a U-shaped notch, and a sixth pin shaft 410 is provided in the U-shaped notch. A limit block is provided at one end of the sixth pin shaft 410, and the limit block is embedded in the limit groove provided in the gear part of the second gear. The other end of the sixth pin shaft is fixed to the eccentric part by a screw, and the other end of the third connecting rod 411 is rotatably connected to the sixth pin shaft 410 and a sixth shaft sleeve 417 is provided between the sixth pin shaft 410, and gaskets 419 are provided between both sides of the third connecting rod 411 and the side faces of the U-shaped notch to reduce friction.

[0038] The transmission assembly adopts a bevel gear transmission mechanism, including a first bevel gear 402 and a second bevel gear 401 that are meshed with each other. The second bevel gear 401 serves as an active bevel gear, which is connected to the power assembly. The first bevel gear 402 is connected to the shaft neck section of the first gear 403 or to the shaft neck section of the second gear 409. In this embodiment, the first bevel gear 402 is connected to the shaft neck section of the first gear 403. Specifically, the gear portion of the first gear 403 is arranged on one side of the shaft neck section of the first gear 403, and the first bevel gear 402 is fixed to the other side of the shaft neck section by screws.

[0039] In this embodiment, the diameter of the first bevel gear 402 is greater than the diameter of the second bevel gear 401 to achieve reduced power transmission.

[0040] In this embodiment, the power component 3 uses a motor, preferably a brushless DC motor. The output shaft of the brushless DC motor passes through the box and is rigidly connected to the second bevel gear 401. A bearing is provided between the output shaft of the brushless DC motor and the box so that the output shaft of the brushless DC motor is rotatably connected to the box.

[0041] The end of the shell close to the first blade 501 and the second blade 502 is wrapped around the outer periphery of the box and fixedly connected to the box.

[0042] The battery pack 2 is connected to the brushless DC motor through a power supply circuit to power the brushless DC motor. The power supply circuit is provided with a switch mounted on the housing to facilitate the staff to control the power on and off of the brushless DC motor.

[0043] The working method of the handheld electric garden shears of the present embodiment is: The operator holds the housing and clamps the blade formed by the first blade 501 and the second blade 502 in the open state to the pruned branch, and presses the switch. The DC brushless motor drives the first gear 403 to rotate through the first bevel gear 402 and the second bevel gear 401. The first gear 403 and the second gear 409 are meshed. The first gear 403 and the second gear 409 rotate in opposite directions. The first gear 403 drives the second connecting rod 408, the fourth connecting rod 422 and the first blade 501 to rotate around the second pin 414 through the first connecting rod 406. At the same time, under the action of the third connecting rod 411, the second blade 502 rotates around the third pin 413, and the rotation direction is opposite to the rotation direction of the first blade 501. The first blade 501 and the second blade 502 make a closing movement towards each other, and the blade edge gradually decreases to achieve shearing of the branches. At the same time, since the third pin 413 moves with the first blade 501, there is also an obvious staggered movement while the first blade 501 and the second blade 502 make a closing movement, which reduces the risk of the blade being stuck in the branch incision.

[0044] In the handheld electric garden shears of the present application, the first blade 501 and the second blade 502 perform a closing movement to reduce the blade edge, and the cutting edges of the first blade 501 and the second blade 502 can also produce a relatively obvious staggered movement, which can prevent the first blade 501 and the second blade 502 from being stuck by the incision of the branch, which is conducive to pruning thicker and harder branches.

[0045] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A handheld electric garden scissors, characterized in that: The gear train is connected to the gear of the transmission gear of the present invention, and the gear train is connected to the gear of the transmission gear of the present invention on the upper and lower ends of the gear train.

2. A handheld electric garden shears according to claim 1, characterized in that: The first gear and the second gear are rotatably connected to the housing.

3. The handheld electric garden shears according to claim 1, characterized in that: The rotation drive mechanism includes a transmission assembly. When the first gear is connected to the rotation drive mechanism, the transmission assembly is connected to the first gear. When the second gear is connected to the rotation drive mechanism, the transmission assembly is connected to the second gear. The transmission assembly is connected to the power assembly. The power assembly is installed inside the shell, and the shell is fixed to the box.

4. The handheld electric garden shears according to claim 3, characterized in that: The transmission assembly adopts a bevel gear transmission mechanism, and the power assembly adopts a motor installed in a housing, and the output shaft of the motor is connected to the input end of the bevel gear transmission mechanism.

5. The handheld electric garden shears according to claim 3, characterized in that: A battery pack is also provided in the shell, and the battery pack is connected to the power component to supply power to the power component.

6. The handheld electric garden shears according to claim 1, characterized in that: A shaft sleeve is provided between the first connecting rod, the end portion of the bottom end of the first blade facing away from the blade and the first pin shaft.

7. The handheld electric garden shears according to claim 1, characterized in that: A shaft sleeve is provided between the second pin shaft and the second connecting rod, the fourth connecting rod and the end portion of the bottom end of the first blade close to the blade.

8. The handheld electric garden shears according to claim 1, characterized in that: A shaft sleeve is provided between the third pin shaft and the end portion of the bottom end of the second blade close to the blade.

9. The handheld electric garden shears according to claim 1, characterized in that: A gasket is provided between the first connecting rod, the second connecting rod and the first blade, and a gasket is provided between the second blade and the end of the third connecting rod.

10. The handheld electric garden shears according to claim 1, characterized in that: The first gear and the second gear each include a gear portion, the gear portion is coaxially connected to a journal, and the gear portions of the first gear and the second gear are meshed with each other; The eccentric portion of the shaft neck of the first gear is provided with a first U-shaped notch, and the end of the first connecting rod extends into the first U-shaped notch and is hinged to the eccentric portion of the shaft neck of the first gear; The eccentric portion of the shaft neck of the second gear is provided with a second U-shaped notch, and the end of the third connecting rod extends into the second U-shaped notch and is hinged to the eccentric portion of the shaft neck of the second gear.

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