US-12616102-B1 - Electric pruning shear

US12616102B1US 12616102 B1US12616102 B1US 12616102B1US-12616102-B1

Abstract

The present invention discloses an electric pruning shear comprising a housing, a drive assembly mounted inside the housing, a support frame, a shearing assembly mounted on the support frame, and a control mechanism installed within the housing. The support frame is mounted at the upper end of the drive assembly, and the control mechanism is electrically connected to the drive assembly to control its activation and deactivation.

Inventors

Yinchao Li

Assignees

Yinchao Li

Dates

Publication Date: 20260505
Application Date: 20251121

Claims (5)

1 . An electric pruning shear, comprising a housing, a drive assembly mounted inside the housing, a support frame, a shearing assembly mounted on the support frame, and a control mechanism installed inside the housing, wherein the support frame is mounted at an upper end of the drive assembly, the control mechanism is electrically connected to the drive assembly, and is used to control activation and deactivation of the drive assembly; the shearing assembly comprises a fixed blade, a moving blade, an oscillating tooth, and a spindle, wherein one side of the support frame is provided with a fixed blade mounting slot, an upper end of the support frame is provided with a shaft hole penetrating through the support frame and the blade mounting slot, the spindle is disposed in the shaft hole, the fixed blade, a lower portion of the moving blade, and a middle-upper portion of the oscillating tooth are each provided with a spindle hole, the spindle hole of the fixed blade is sleeved on the spindle, and the lower portion of the fixed blade is mounted in the fixed blade mounting slot, the fixed blade mounting slot limits the fixed blade so that the fixed blade is fixed and cannot rotate, the moving blade is disposed outside the fixed blade and is rotatably connected to the spindle via the spindle hole, the oscillating tooth is disposed outside the moving blade and is rotatably connected to the spindle via the spindle hole, an upper end of the oscillating tooth and a middle-lower portion of the moving blade are each provided with a connection hole, the connection hole is rotatably provided with a connection shaft connecting the oscillating tooth and the moving blade, thereby achieving linkage between the oscillating tooth and the moving blade, a lower end of the oscillating tooth meshes with the drive assembly, the drive assembly drives the oscillating tooth to oscillate, thereby driving the moving blade to oscillate about the spindle to achieve opening and closing of the pruning shear, an outer side of the oscillating tooth on the spindle is provided with a lock nut, one end of the spindle is provided with an oil inlet hole, and the spindle is provided with an oil outlet hole communicating with the oil inlet hole; it further comprises an oil reservoir installed inside the housing, a lower end of the oil reservoir is provided with an oil tube communicating with the interior of the oil reservoir, another end of the oil tube is communicated with the oil inlet hole, and an upper end of the oil reservoir is provided with a plunger button.
2 . The electric pruning shear of claim 1 , wherein the control mechanism comprises a control board, a Hall effect board, and a trigger switch, the control board is disposed at a bottom inside the housing, the support frame is provided with the Hall effect board below the moving blade, the Hall effect board is electrically connected to the control board, and one side of the support frame inside the housing is rotatably provided with the trigger switch cooperating with the Hall effect board.
3 . The electric pruning shear of claim 2 , wherein the drive assembly comprises a motor and a gearbox connected to the motor, a lower end of the support frame is mounted on an upper end of the gearbox, and an output shaft of the gearbox extends into the support frame, one side of the support frame is provided with a drive gear driven by the output shaft of the gearbox, the oscillating tooth meshes with the drive gear, and the motor is electrically connected to the control board.
4 . The electric pruning shear of claim 1 , wherein the spindle holes of the moving blade and the oscillating tooth are each provided with a bearing, and the moving blade and the oscillating tooth are each rotatably connected to the spindle via the bearing.
5 . The electric pruning shear of claim 1 , wherein one end of the spindle provided with the oil inlet hole is provided with a locking gear via a key, the locking gear is sleeved with a locking element, the locking gear meshes with an inner wall of the locking element, and a bottom of the locking element is provided with a locking slot; the support frame is provided with a locking screw hole below the shaft hole, the locking element is connected by a bolt to the locking screw hole, and is used to fix the locking element, thereby locking the spindle and the locking gear; one side of the housing adjacent to the locking gear is provided with a slot for accommodating the locking element, and the slot is snap-fitted with a protective cover.

Description

FIELD OF THE APPLICATION The present invention relates to the technical field of electric pruning shears, specifically to an electric pruning shear. BACKGROUND As an efficient and labor-saving gardening tool, electric pruning shears are widely used in operations such as fruit tree pruning and hedge shaping. They are typically driven by an electric motor that activates a transmission mechanism, which in turn causes the moving blade to perform a reciprocating oscillation relative to the fixed blade, thereby achieving the cutting action. During operation, frequent friction occurs between moving components such as the blades, oscillating teeth, and the spindle. Prolonged use can easily lead to wear, affecting cutting efficiency and the tool's service life. Therefore, regular lubrication maintenance for these moving parts is essential. Existing electric pruning shears generally lack a built-in, convenient lubrication system. Operators often need to manually prepare lubricating oil or grease and apply it periodically after disassembling part of the housing or components. This method presents several inconveniences: First, operators need to carry lubricants separately, which is particularly inconvenient during outdoor work. Second, manual application makes it difficult to control the amount of lubricant precisely, often resulting in either excessive oil that contaminates the work area or insufficient oil that compromises lubrication effectiveness. Furthermore, the disassembly process is relatively cumbersome, not only increasing maintenance time but also potentially adversely affecting the tool's connection structure and sealing performance due to frequent assembly and disassembly. Additionally, since real-time lubrication during tool operation is not possible, moving parts may operate in a state of dry friction during the middle or later stages of a prolonged task due to depleted or lost grease, accelerating wear. Therefore, to address the aforementioned technical issues, an electric pruning shear is designed. SUMMARY The technical problem to be solved by the present invention is to overcome the above-mentioned technical deficiencies and provide an electric pruning shear. To solve the above technical problem, the technical solution provided by the present invention is an electric pruning shear, comprising: a housing; a drive assembly mounted inside the housing; a support frame; a shearing assembly mounted on the support frame; and a control mechanism installed inside the housing. The support frame is mounted at an upper end of the drive assembly. The control mechanism is electrically connected to the drive assembly and is configured to control activation and deactivation of the drive assembly. The shearing assembly comprises a fixed blade, a moving blade, an oscillating tooth, and a spindle. One side of the support frame is provided with a fixed blade mounting slot. An upper end of the support frame is provided with a shaft hole penetrating through the support frame and the blade mounting slot. The spindle is disposed in the shaft hole. The fixed blade, a lower portion of the moving blade, and a middle-upper portion of the oscillating tooth are each provided with a spindle hole. The spindle hole of the fixed blade is sleeved on the spindle, and the lower portion of the fixed blade is mounted in the fixed blade mounting slot. The fixed blade mounting slot limits the fixed blade, thereby fixing the fixed blade and preventing it from rotating. The moving blade is disposed outside the fixed blade and is rotatably connected to the spindle via its spindle hole. The oscillating tooth is disposed outside the moving blade and is rotatably connected to the spindle via its spindle hole. An upper end of the oscillating tooth and a middle-lower portion of the moving blade are each provided with a connection hole. A connection shaft is rotatably disposed within the connection holes, connecting the oscillating tooth and the moving blade to achieve linkage between the oscillating tooth and the moving blade. A lower end of the oscillating tooth meshes with the drive assembly. The drive assembly drives the oscillating tooth to oscillate, thereby driving the moving blade to oscillate about the spindle to achieve opening and closing of the pruning shear. A lock nut is provided on the spindle outside the oscillating tooth. Another end of the spindle is provided with an oil inlet hole. The spindle is provided with an oil outlet hole communicating with the oil inlet hole. The electric pruning shear further comprises an oil reservoir installed inside the housing. A lower end of the oil reservoir is provided with an oil tube communicating with an interior of the oil reservoir. Another end of the oil tube communicates with the oil inlet hole. An upper end of the oil reservoir is provided with a plunger button. As an improvement, the control mechanism comprises a control board, a Hall effect board, and a trigger switch. The control board i