CN210157699U

CN210157699U - Accurately controlled electric scissors

Info

Publication number: CN210157699U
Application number: CN201920976467.8U
Authority: CN
Inventors: 胡文进
Original assignee: Individual
Current assignee: Zhejiang Guyuehu Industry And Trade Co ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-03-20
Anticipated expiration: 2029-06-26

Abstract

The utility model discloses an electric scissors with accurate control, which comprises a shell, a fixed knife and a movable knife, the movable knife is connected to a motor through the power of a transmission mechanism, the transmission mechanism comprises a first planetary reducer and a second planetary reducer which are connected in series, a small bevel gear is fixed on the power output end of the second planetary reducer, meanwhile, a cast aluminum piece is fixed in the shell, the aluminum casting is provided with a matching hole penetrating through the left side surface and the right side surface of the aluminum casting, at least 1 deep groove bearing is arranged in the matching hole, a connecting shaft passes through the inner ring of the deep groove bearing, one end of the connecting shaft is fixed with a big bevel gear, the other end is fixed with a driving straight gear, moreover, the middle part of the movable knife is pivoted on the upper part of the aluminum casting, and the lower part of the movable knife is fixed with a swing gear, and the small bevel gear is meshed with the big bevel gear, and the swing gear is meshed with the driving spur gear. The utility model has the advantages that: the efficiency is higher, control is comparatively accurate, the shearing force is great.

Description

Accurately controlled electric scissors

Technical Field

The invention relates to the technical field of gardening tools, in particular to an electric scissors with accurate control.

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. It has the common drawbacks that: the shearing force is small, and the shearing action is not easy to control.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the electric scissors with accurate control, which have the characteristics of higher efficiency, more accurate control and larger shearing force.

In order to achieve the purpose, the invention adopts the technical scheme that: an electric scissors with precise control comprises a shell, a fixed cutter and a movable cutter, wherein the movable cutter is connected to a motor through a transmission mechanism, the motor is electrically connected to a power supply through a trigger system, the transmission mechanism comprises a first planetary reducer and a second planetary reducer, the power input end of the first planetary reducer is connected to the motor through power, the power input end of the second planetary reducer is connected to the power output end of the first planetary reducer through power, a small bevel gear is fixed on the power output end of the second planetary reducer, meanwhile, a cast aluminum part is fixed in the shell, a matching hole penetrating through the left side and the right side of the cast aluminum part is arranged on the cast aluminum part, at least 1 deep groove bearing is arranged in the matching hole, a connecting shaft penetrates through the inner ring of the deep groove bearing, a large bevel gear is fixed at one end of the connecting shaft, and a straight driving gear is fixed at the other end of the connecting shaft, and the middle part of the movable cutter is pivoted on the upper part of the aluminum casting, a swing gear is fixed on the lower part of the movable cutter, the small bevel gear is meshed with the large bevel gear, and the swing gear is meshed with the driving straight gear.

The trigger system comprises a trigger, a magnet and a Hall sensing plate, wherein the middle part of the trigger is hinged to the shell, the magnet is fixed at the end part of the trigger, the Hall sensing plate is fixed on the shell and matched with the magnet, and the Hall sensing plate is connected with the motor through a controller.

The connecting shaft and the driving straight gear are integrally formed.

The power supply is an external battery pack, and the external battery pack comprises a battery and a protection plate thereof.

Compared with the prior art, the invention has the advantages that: the efficiency is higher, control is comparatively accurate, the shearing force is great. The precisely controlled electric scissors of the invention can convert the high rotating speed and low torque of the motor to the low rotating speed and high torque to a greater extent by arranging the 2 planetary speed reducers which are mutually connected, and the lower output rotating speed is convenient for controlling the running speed of the moving knife, so that a trigger system can more precisely control the position of the moving knife, and the moving knife has larger shearing force. Meanwhile, the connecting shaft is matched with the deep groove bearing, so that the connecting shaft can rotate more smoothly, and the operation efficiency of the electric scissors is improved.

Drawings

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

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

fig. 2 is a connection block diagram of a control circuit of the embodiment of the present invention.

Detailed Description

Example, see figure 1: the precisely controlled electric scissors comprise a shell 10, a fixed knife 21 and a movable knife 22. The housing 10 may be of a two-piece construction and secured together by screws to form a housing having an internal cavity. 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 movable blade 22 is power-connected to a motor 40 through a transmission mechanism, and the motor 40 is electrically connected to a power source (not shown) through a trigger system 70, wherein the power source can be a rechargeable battery such as a lithium battery pack.

Further speaking:

the transmission mechanism includes a first planetary reduction gear 31 and a second planetary reduction gear 32. The power input end of the first planetary reducer 31 is connected to the motor 40, and the power input end of the second planetary reducer 32 is connected to the power output end of the first planetary reducer 31. A bevel pinion 33 is fixed to the power output end of the second planetary gear set 32. Meanwhile, an aluminum casting 11 is fixed in the housing 10. The aluminum casting 11 is provided with a matching hole 111 penetrating through the left and right side surfaces of the aluminum casting 11, and at least 1 deep groove bearing 50 is arranged in the matching hole 111. In order to balance the stress, in this embodiment, 2 deep groove bearings 50 are arranged side by side. The inner ring of the deep groove bearing 50 is penetrated with the connecting shaft 34 in an interference fit or transition fit mode. One end of the connecting shaft 34 is fixed with a large bevel gear 35, and the other end is fixed with a driving spur gear 60. The connecting shaft 34 and the drive spur gear 60 are preferably integrally formed. Moreover, the middle portion of the movable blade 22 is pivotally connected to the upper portion of the aluminum casting 11, and a swing gear 221 is fixed to the lower portion of the movable blade 22. And, the bevel pinion 33 is engaged with the bevel pinion 35, and the swing gear 221 is engaged with the driving spur gear 60. That is, after the motor 40 rotates, the bevel pinion 33 is rotated by the two-stage deceleration and the torque is increased, the bevel pinion 33 drives the bevel gear 35 to rotate, and finally the spur gear 60 is driven to rotate. Wherein, the axes of the small bevel gear 33 and the big bevel gear 35 are perpendicular to each other, thereby realizing the change of the torque direction. Thus, the moving blade 22 operates at a low speed for precise control and with high shear.

Optimizing:

the trigger system 70 includes a trigger 71 hinged to the housing 10 at a central portion thereof, a magnet 72 fixed to an end portion of the trigger 71, and a hall sensor plate 73 fixed to the housing 10 to be fitted with the magnet 72. It is apparent that the magnet 72 and the pulling end of the trigger 71 are located at both ends of the hinge point of the trigger 71 and the housing 10, respectively. And, the sensing part on the hall sensing plate 73 is a distance sensing part, and the hall sensing plate 73 is connected to the motor 40 through a controller (not shown in the figure). That is, the distance between the magnet 72 and the sensing portion of the hall sensor 73 is different according to the extent to which the trigger 71 is pulled, and the controller can make the motor 40 have different rotation speeds and rotate forward or backward, so that the movable blade 22 and the fixed blade 21 have different opening widths, and the use is more convenient.

For example, as shown in fig. 2, the control circuit of the trigger system 70 of the electric scissors is: the U phase, the V phase and the W phase of the main control board are correspondingly connected with the U phase, the V phase and the W phase of the motor 40 (adopting a direct current brushless motor); the +12V joint, the GND joint and the Rx joint of the main control board are respectively connected with the +12V joint, the GND joint and the Tx joint of an aviation plug conversion board; the +5V joint, the GND joint and the Tx joint of the aviation plug conversion plate are respectively connected with the +5V joint, the GND joint and the Tx joint of the Hall sensing plate; meanwhile, the hall sensing plate is provided with a large hall sensing point, a small hall sensing point, a closed hall sensing point, a handle hall sensing point and a human body touch prevention point which can be matched with the magnet 72 on the trigger 71. When the Hall sensing device works specifically, the triggered state and the human body prevention signal of each Hall sensing point are detected by using a chip with 10 feet in real time and are transmitted to the main control board in real time through the transmitting port on the Hall sensing board, the main control board controls the motor 40 to form a corresponding working state, and finally the movable knife 22 and the fixed knife 21 form states of opening a large opening, opening a small opening, closing and the like.

The external battery pack contains a battery and a protection plate thereof. According to requirements, the number of battery sections in the external battery pack is generally designed into 4-14 strings, and the protection board is mainly used for protecting battery abnormity (overcurrent, under-overvoltage, over-temperature and low power consumption). Under normal conditions, the external battery pack also provides a system power supply for the main control panel. The logic function of the main control board mainly comprises a motor control module and a communication module; the motor control module belongs to the control of a non-inductive direct current brushless motor and carries out actions such as forward rotation, reverse rotation, braking and the like according to the requirements of products; the communication module belongs to serial communication, is mainly responsible for decoding the Hall state of each Hall sensing point on the Hall sensing plate in real time and preventing human body signals, is usually designed into high-voltage communication, and can effectively improve the baud rate, inhibit signal interference and avoid short circuit abnormality of a signal wire and a high-voltage wire.

According to the structural characteristics of the product, the main control board and the Hall board of the electric scissors can be embedded, and the main control board and the Hall board are not separated in connection, so that the product can be designed into low-voltage communication without needing an aviation plug-in conversion board. However, when the main control board and the hall induction board are externally connected, the connection between the main control board and the hall induction board is oppositely inserted, and the aviation plug-in conversion board is required for the products. In order to increase the baud rate and the interference resistance of the signal, high-voltage communication is preferably designed. The aviation plug adapter plate is used for facilitating the plugging and unplugging of the electric scissors and the main control board, and meanwhile, the transmission signal of the Hall sensing plate can be converted into a high-voltage signal to be provided for the main control board to be decoded.

In addition:

the aluminum casting 11 may be provided with a through channel 112 having a lower opening extending to the lower side of the aluminum casting 11, and the upper end of the through channel 112 extends to the left side of the middle of the aluminum casting 11, after the bevel pinion 33 penetrates into the through channel 112 from bottom to top, the bevel pinion 33 and the bevel gear 35 are engaged. Namely, the structure of the product is more compact and rational.

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

1. Accurate control's electric scissors, including casing (10), stationary knife (21) and move sword (22), and should move sword (22) and pass through drive mechanism power connection to a motor (40), this motor (40) is connected to the power through trigger system (70) electricity, its characterized in that: the transmission mechanism comprises a first planetary reducer (31) and a second planetary reducer (32), the power input end of the first planetary reducer (31) is connected to the motor (40) in a power mode, the power input end of the second planetary reducer (32) is connected to the power output end of the first planetary reducer (31) in a power mode, a small bevel gear (33) is fixed to the power output end of the second planetary reducer (32), meanwhile, a cast aluminum piece (11) is fixed in the shell (10), a matching hole (111) penetrating through the left side face and the right side face of the cast aluminum piece (11) is formed in the cast aluminum piece (11), at least 1 deep groove bearing (50) is arranged in the matching hole (111), a connecting shaft (34) penetrates through the inner ring of the deep groove bearing (50), a large bevel gear (35) is fixed to one end of the connecting shaft (34), and a driving straight gear (60) is fixed to the other end of the connecting shaft (34), moreover, the middle part of the movable blade (22) is pivoted on the upper part of the aluminum casting (11), a swing gear (221) is fixed on the lower part of the movable blade (22), the small bevel gear (33) is meshed with the large bevel gear (35), and the swing gear (221) is meshed with the driving straight gear (60).

2. The precisely controlled electric shears according to claim 1, wherein: the trigger system (70) comprises a trigger (71) hinged to the shell (10) in the middle, a magnet (72) fixed to the end of the trigger (71), a Hall sensing plate (73) fixed to the shell (10) and matched with the magnet (72), and the Hall sensing plate (73) is connected with the motor (40) through a controller.

3. The precisely controlled electric shears according to claim 1, wherein: the connecting shaft (34) and the driving straight gear (60) are integrally formed.

4. The precisely controlled electric shears according to claim 1, wherein: the power supply is an external battery pack, and the external battery pack comprises a battery and a protection plate thereof.