CN2233163Y - Double-insulating electric pruning shears - Google Patents

Abstract

The utility model relates to a pair of double insulating electric pruning shears, which is composed of a casing body, a switch of main power supply, a protection switch, a motor, a gear shaft, a gear, a hollow shaft, an eccentric cam, an upper blade, a lower blade, etc. Power is input by the motor and slows down through the gear, and the upper blade and the lower blade are respectively driven to have synchronous reciprocating shearing motion within the range of a long groove in an upper clamping plate and a lower clamping plate by an eccentric disc on the eccentric cam and the eccentric small column on the eccentric cam. Therefore, the pruning operation of shrubs and hedges can be finished. The utility model has the advantages of flexible use, reliable use, convenience and labor saving; besides, the utility model has the security that operator can not be damaged by the shears, and sheared branches can be prevented from splashing onto hands.

Description

The double insulation electric shrub and hedge trimmer

The utility model relates to the hand held electric tool of shrub or hedge pruning usefulness.

Shrub and hedge trimmer belong to the cutting implement of gardening special use, can be shrub, hedge carries out beta pruning and finishing, and along with the development of afforestation undertaking, shrub and hedge trimmer will become indispensable greening instrument.The shrub and hedge trimmer overwhelming majority in the existing technology is a manual type, and shape is as scissors, uses very difficultly, and labour intensity is big and efficient is low.A kind of electronic shrub and hedge trimmer are also arranged, with the motor is power, make reciprocal shearing motion through gear reduction rear drive blade, reach the beta pruning dressing purpose, though this shrub and hedge trimmer efficient is high, people use also very laborsaving, and the defective that exists is that safety is undesirable, operator's both hands are easily injured by scissors, and the branch of cutting also easily is splashed on the back of the hand.

The purpose of this utility model is to overcome the defective of prior art and provides a kind of operator's of making both hands to obtain reliable protection, is not the double insulation electric shrub and hedge trimmer that scissors injured.

The purpose of this utility model realizes by following scheme: the housing handle is provided with main power switch; motor is located in the housing; motor output shaft is a gear shaft; it and the gears engaged deceleration transmission that is bearing on the hollow shaft in the bearing; power passes to the eccentric cam that is attached thereto through hollow shaft; it is reciprocating to drive upper and lower blade; while is series connection one protection switch between main power switch and motor, and this protection switch is made up of the housing switch cover that extends and the button and the microswitch that are hinged on the switch cover by one.

Also be fixed with protective cover on the shrub and hedge trimmer.

The utility model is because the protection switch of connecting between main power switch and motor; two hands grip simultaneously during operation; while or priority are pressed power switch and protection switch; motor could be switched on, and makes operator's both hands obtain reliably protecting like this, is not injured by scissors; in addition; owing to protective cover is housed, prevents that the branch of cutting is splashed on the back of the hand, has improved operator's safety more.

Description of drawings.

Fig. 1 is the utility model structural representation.

Fig. 2 is the A blade clamping connection layout up and down of Fig. 1.

Fig. 3 is the B-B cutaway view of Fig. 2.

Fig. 4 is the eccentric cam structure chart.

Remake by above-mentioned accompanying drawing embodiment and to describe in further detail.

Gripping handle (6) and the mutual close-fitting of case (5) that double insulation electric shrub and hedge trimmer (referring to Fig. 1-3) is made by insulating materials are inserted by forming housing; handle is provided with main power switch (8); the power line that connects switch links to each other with plug (7) through the handle uropore; and between main power switch (8) and motor (4) series connection one protection switch, this protection switch has the switch cover (3) of a square handle of likeness in form that is extended by housing and button (1) and the microswitch (2) that is hinged on the switch cover to form.

Motor (4) is located in the housing, employing be the single phase ac series excited machine owing to add insulating part between rotor and the output shaft, prevent so be called double insulation, to be prerequisite as electric tool just in case rotor punctures and causes output shaft charged.Motor output shaft is gear shaft (9), gear (10) engagement deceleration transmission on it and the two supports hollow shaft (11) in bearing, gear is connected with hollow pivot pin, and hollow shaft is threaded with eccentric cam (12) again, and eccentric cam has eccentric disc (24) and eccentric small column (23).It is reciprocating that eccentric cam drives upper and lower blade.

Upper and lower blade (14), (15) are multiple tooth structure, and 8 elongated slots (17) that become word order are arranged on total length, and afterbody respectively has large and small oblong slots (20), (19).The eccentric disc (24) of eccentric cam (12) is positioned at movable cooperation of big oblong slots (20) of cutter (14), eccentric small column (23) is positioned at movable cooperation of little oblong slots (19) of bottom knife (15), rotatablely moving of eccentric cam is converted into the straight reciprocating motion of upper and lower blade, because two blade movements synchronously and not in the same way, so form mutual shear action.And be clamped in behind the upper and lower blade closed assembly in upper and lower clamping plate (22), (18), pass each elongated slot (17) by 6 groups of sleeves (21) and screw, nut and be connected one, and be fixed on the lower edge of housing by cover plate (13).The height of sleeve is slightly larger than upper and lower blade sum, and diameter is slightly less than upper and lower blade elongated slot width, makes that upper and lower blade is above, lower plate and sleeve do straight reciprocating motion for being directed in the elongated slot stroke.

Shrub and hedge trimmer are provided with protective cover (16), prevent that the branch of cutting is splashed on the back of the hand of operator, and this protective cover utilizes the letter of one group of cover, screw, the nut of fixed blade to be fixed on the train wheel bridge.

Shrub and hedge trimmer also are provided with the protective sleeve (not shown) that can make upper and lower blade built-in and detachable, make the upper and lower blade of protection during collection and use.

Shed protective sleeve during use earlier; after pressing main power switch (8) and protection switch successively; motor (4) starts; gear shaft (9) drives the rotation synchronously of hollow shaft (11), eccentric cam (12) after slowing down with gear (10) engagement; because the combination transmission of eccentric cam and upper and lower blade special construction; just be converted into the reciprocal shearing motion of upper and lower blade (14), (15), thereby finish the beta pruning and the finishing process of shrub or hedge.

Claims (6)

1. double insulation electric shrub and hedge trimmer; housing handle (6) is provided with main power switch (8); motor (4) is located in the housing; motor output shaft is gear shaft (9); it and gear (10) the engagement deceleration transmission that is bearing on the hollow shaft (11) in the bearing; power passes to the eccentric cam (12) that is attached thereto through hollow shaft; in the drive; bottom knife (14); (15) reciprocating; it is characterized in that between main power switch (8) and motor (4) series connection one protection switch, this protection switch has a switch cover (3) that is extended by housing and button (1) and the microswitch (2) that is hinged on the switch cover to form.

2. double insulation electric shrub and hedge trimmer as claimed in claim 1 is characterized in that described upper and lower blade (14), (15) are multiple tooth structure, has several to become the elongated slot (17) of word order on total length, and afterbody has large and small oblong slots (20), (19) respectively.

3. double insulation electric shrub and hedge trimmer as claimed in claim 1, it is characterized in that eccentric cam (12) has eccentric disc (24) and eccentric small column (23), eccentric disc (24) is positioned at movable cooperation of big oblong slots (20) of cutter (14), and eccentric small column (23) is positioned at movable cooperation of little oblong slots (19) of bottom knife (15).

4. double insulation electric shrub and hedge trimmer as claimed in claim 1, it is characterized in that being clamped in upper and lower clamping plate (22), (18) behind upper and lower blade (14), (15) closed assembly, pass each elongated slot (17) by effect group sleeve (21) and screw, nut and be connected one, and be fixed on the lower edge of housing by cover plate (13).

5. as claim 1 or 2 or 3 or 4 described double insulation electric shrub and hedge trimmers, it is characterized in that shrub and hedge trimmer are provided with fixing protective cover (18).

6. double insulation electric shrub and hedge trimmer as claimed in claim 5 is characterized in that shrub and hedge trimmer also are provided with the protective sleeve that can make upper and lower blade built-in and detachable.

Images