CN210157697U - Large-torque electric scissors - Google Patents

Abstract

The utility model discloses a big moment of torsion electric scissors, including the casing and be located the stationary knife on this casing upper portion and move the sword, and should move the sword and be connected to a motor through drive mechanism power, this motor is connected to the power through trigger system electricity, drive system includes that power links together and all is located a planetary reducer and a screw nut mechanism in this casing, and wherein, this planetary reducer's power input end power is connected to the power output shaft of this motor, and this screw nut mechanism includes lower extreme rigid coupling to this planetary reducer's power output end's lead screw, is located the top of this lead screw and the connecting rod of rear portion spiro union on this lead screw, and simultaneously, the upper end hinge of this connecting rod is being compared in this lower extreme that moves the sword and this connecting rod moves the sword and can not rotate to and, the middle part pin joint that should move the sword is in the front portion of this casing. The utility model has the advantages that: the output torque is large, and a large shearing force can be formed.

Description

Large-torque electric scissors

Technical Field

The invention relates to the technical field of gardening tools, in particular to a large-torque electric scissors.

Background

The electric scissors are widely applied to the fields of gardens, gardening and the like and are used for shearing branches of nursery stocks and the like. Generally, electric scissors comprise a housing, a stationary blade and a movable blade, and the movable blade is power-connected to a motor through a transmission mechanism, and the motor is electrically connected to a power source through a trigger system. However, the shearing force formed by the common electric scissors is small, and in some occasions, the use requirement is difficult to meet.

Disclosure of Invention

In view of the above-mentioned disadvantages of the prior art, the present invention provides a pair of electric shears with large torque, which has the characteristics of large output torque and capability of forming large shearing force.

In order to achieve the purpose, the invention adopts the technical scheme that: the high-torque electric scissors comprise a shell, a fixed cutter and a movable cutter, wherein the fixed cutter and the movable cutter are positioned on the upper part of the shell, the movable cutter is connected to a motor through power of a transmission mechanism, the motor is electrically connected to a power supply through a trigger system, the transmission system comprises a planetary reducer and a screw nut mechanism which are connected together through power and are positioned in the shell, the power input end of the planetary reducer is connected to the power output shaft of the motor through power, the screw nut mechanism comprises a screw rod, the lower end of which is fixedly connected to the power output end of the planetary reducer, and a connecting rod, the connecting rod is positioned above the screw rod, the rear portion of which is screwed on the screw rod, meanwhile, the upper end of the connecting rod is hinged to the lower end of the movable cutter, the connecting rod is not rotatable compared with the movable cutter, and.

The middle part of casing is fixed with an upper ring dish, and the lower part of this upper ring dish is equipped with a plane bearing, and the below of this plane bearing is equipped with a packing ring, and simultaneously, this planetary reducer's power take off end includes that a rotor plate and lower extreme fix the connecting axle at the middle part of this rotor plate, and the side of going up of this rotor plate supports on the downside of this packing ring down, and this packing ring, plane bearing, upper ring dish are passed in proper order from supreme down to this connecting axle.

The lower part cover of lead screw is equipped with a magnet, simultaneously, is fixed with a hall inductor who matches with this magnet on this casing, and this hall inductor signal connection is to this motor.

After adopting the structure, compared with the prior art, the invention has the advantages that: the output torque is large, and a large shearing force can be formed. The large-torque electric scissors are provided with the secondary transmission mechanism, the planetary speed reducer and the screw rod nut mechanism are organically combined, and the high rotating speed and low torque of the motor are converted into the high torque required by the movable knife, so that the movable knife has larger shearing force, and the requirements of more use occasions are met.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is an exploded perspective view of a high torque electric shears of an embodiment of the present invention;

FIG. 2 is an exploded perspective view of the planetary reducer of the present invention in combination with a flat bearing;

fig. 3 is an exploded perspective view of the screw and link combination of the present invention.

Detailed Description

Examples, see fig. 1-3: the high torque electric scissors comprise a shell 10, a fixed knife 21 and a movable knife 22 which are positioned at the upper part of the shell 10. The housing 10 may be of a two-piece construction and secured together by screws to form a housing having an internal cavity. The housing 10 may further include an aluminum casting for mounting the stationary blade 21, the movable blade 22, a transmission mechanism, a motor 40, an upper washer 51, a flat bearing 52, a lower washer 53, a magnet 61, a hall sensor 62, and the like. After the fixed knife 21 is fixed, no motion such as swinging or the like is generated relative to the housing 10, and the movable knife 22 can generate reciprocating swinging relative to the fixed knife 21 and then forms shearing motion with the fixed knife 21. The moving blade 22 is power connected through a transmission mechanism to a motor 40, and the motor 40 is electrically connected to a power source (not shown) through a trigger system 70. The trigger system 70 is a switch with a trigger, which is of a relatively conventional construction. For example, the trigger system 70 includes a trigger having a central portion directly or indirectly pivoted to the housing 10, a magnet disposed at one end of the trigger, and a hall sensor plate directly or indirectly fixed to the housing 10. Meanwhile, a plurality of Hall sensing points which can be matched with the magnets are arranged on the Hall sensing plate, and the Hall sensing points are in signal connection with the motor. That is, after the trigger is pulled, the magnet moves to trigger different hall sensing points, and finally the motor 40 is started, turned off, rotated forward or rotated backward.

Further speaking:

the transmission system includes a planetary reducer 31 and a lead screw nut mechanism 32 that are power connected together and are both located within the housing 10. Wherein, the power input end of the planetary reducer 31 is connected to the power output shaft of the motor 40. The lead screw-nut mechanism 32 includes a lead screw 321 whose lower end is fixed to the power output end of the planetary reducer 31, and a connecting rod 322 located above the lead screw 321 and having a rear portion screwed to the lead screw 321. That is, the rear portion of the link 322 is provided with a screw hole having a downward opening, and the upper portion of the screw rod 321 is screwed into the screw hole. Meanwhile, the upper end of the connecting rod 322 is hinged to the lower end of the movable blade 22, and the connecting rod 322 is not rotatable relative to the movable blade 22, so that the movable blade 22 cannot necessarily rotate relative to the housing 10 about the vertical rotation axis. And the middle part of the movable blade 22 is pivoted at the front part of the shell 10. Thus, after the high rotation speed and low torque of the motor 40 are converted into the low rotation speed and high torque by the planetary transmission 31, and the screw rod 321 is driven to rotate by the power output end of the planetary transmission 31, the connecting rod 322 does not rotate, so that the connecting rod 322 moves in the vertical direction to drive the lower end of the movable knife 22 to move vertically, the front part of the movable knife 22 swings, and the fixed knife 21 performs a shearing action. That is, after the second deceleration, the shear force formed is large.

Optimizing:

an upper washer 51 is fixed to the middle of the housing 10, a flat bearing 52 is provided at the lower part of the upper washer 51, and a lower washer 53 is provided below the flat bearing 52. Meanwhile, the power output end of the planetary reducer 31 includes a rotating plate 311 and a connecting shaft 312 with the lower end fixed at the middle of the rotating plate 311, the upper side of the rotating plate 311 is supported on the lower side of the lower washer 53, and the connecting shaft 312 sequentially passes through the lower washer 53, the plane bearing 52 and the upper washer 51 from bottom to top. That is, the plane bearing 52 is introduced to limit the planetary reducer 31 not to move upwards, and to make the rotation of the power output end of the planetary reducer 31 smoother, thereby further improving the working efficiency of the electric shears to a certain extent.

A magnet 61 is sleeved on the lower portion of the screw rod 321. Meanwhile, a hall sensor 62 is fixed to the housing 10 to be matched with the magnet 61. The hall sensor 62 is signally connected to the motor 40. That is, after the screw rod 321 rotates a certain angle, the magnet 61 will trigger the hall sensor 62, and the hall sensor 62 can control the motor 40 to switch the rotating direction, so as to circulate the shearing action. The connection and control method of the hall sensor 62 and the motor 40 is prior art and will not be described in detail.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (3)

1. Large-torque electric scissors comprise a shell (10), a fixed knife (21) and a movable knife (22) which are positioned on the upper part of the shell (10), the movable knife (22) is connected to a motor (40) through a transmission mechanism, the motor (40) is electrically connected to a power supply through a trigger system (70), and the large-torque electric scissors are characterized in that: the transmission mechanism comprises a planetary reducer (31) and a screw rod nut mechanism (32) which are connected together in a power mode and located in the shell (10), wherein a power input end of the planetary reducer (31) is connected to a power output shaft of the motor (40) in a power mode, the screw rod nut mechanism (32) comprises a screw rod (321) and a connecting rod (322), the lower end of the screw rod (321) is fixedly connected to a power output end of the planetary reducer (31), the connecting rod (322) is located above the screw rod (321), the rear portion of the connecting rod (322) is connected to the screw rod (321) in a threaded mode, meanwhile, the upper end of the connecting rod (322) is hinged to the lower end of the movable knife (22), the connecting rod (322) cannot rotate relative to the movable knife (22), and the middle portion of the movable knife (22) is pivoted to the front portion.

2. High torque electric scissors according to claim 1, characterised in that: the middle part of casing (10) is fixed with one and goes up packing ring (51), the lower part of this last packing ring (51) is equipped with a plane bearing (52), the below of this plane bearing (52) is equipped with packing ring (53) down, simultaneously, the power take off end of this planetary reducer (31) includes that one rotor plate (311) and lower extreme fix connecting axle (312) at the middle part of this rotor plate (311), and the side support of going up of this rotor plate (311) is on the downside of this packing ring (53) down, this connecting axle (312) from supreme passing this down packing ring (53), plane bearing (52), last packing ring (51) in proper order down.

3. High torque electric scissors according to claim 1, characterised in that: the lower part of the screw rod (321) is sleeved with a magnet (61), meanwhile, a Hall sensor (62) matched with the magnet (61) is fixed on the shell (10), and the Hall sensor (62) is connected to the motor (40) through signals.

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