CN202147052U

CN202147052U - Hand-held electric circular saw

Info

Publication number: CN202147052U
Application number: CN2011202065159U
Authority: CN
Inventors: 吹拔正敏
Original assignee: NANJING JIUCHI ELECTROMECHANICAL INDUSTRY Co Ltd
Current assignee: NANJING JIUCHI ELECTROMECHANICAL INDUSTRY Co Ltd
Priority date: 2011-02-14
Filing date: 2011-06-01
Publication date: 2012-02-22
Anticipated expiration: 2021-06-01

Abstract

The utility model relates to a hand-held electric circular saw belonging to the technical field of electric tools. The electric circular saw comprises a bottom plate used for supporting a rotatable saw bit. The saw bit and a motor are in a transmission connection by a transmission mechanism. The motor is disposed in a machine housing, and the machine housing is provided with a handle. The utility model is characterized in that the transmission mechanism is a steering transmission shaft after the side arrangement transition; a rotation axis of the motor is vertical to a rotation axis of the saw bit, and is disposed on the vertical surface in the range of 30 mm away from the surface of the saw bit. By adopting the hand-held electric circular saw provided in the utility model, the rotation axis of the motor is disposed on the surface, in the range of which is arranged the thickness of the saw bit, the balance is good, and the limitation of the saw bit by inclining leftwards or rightwards can be reduced, the center of gravity of the electric circular saw body, the push-down force during the operation, and the direction of the cutting resistance on the saw bit can be superposed on one same surface, thereby the torque deviation can be prevented, and the sawing quality can be guaranteed.

Description

A kind of hand-held electric circular saw

Technical field

The utility model relates to a kind of electric circular saw, and especially a kind of hand-held electric circular saw belongs to the electric tool technical field.

Background technology

Electric circular saw is a kind of electric tool commonly used; Its basic structure contains: the base plate that supports rotatable saw blade; Rotatable saw blade is connected with drive of motor, and motor is positioned at casing, is fixedly connected with casing and the secure shroud on shade saw blade top; The movable shield of the hinged shade saw blade of one end and casing bottom, and the power brick that is connected power supply with casing.

The typical structure of existing electric circular saw such as application number are that CN200920046200.5, name are called " direct current annular saw " and application number to be that CN200910132906.8, name are called the Chinese patent file of " electric saw " disclosed.Wherein the rotation of the rotation of motor and saw blade is parallel to each other; Because the axial dimension of motor is usually obviously greater than its radial dimension; Therefore the structure of motor and saw blade axis line parallel certainly will cause the electric circular saw main body bigger in the size of saw blade thickness direction, and the inclination angle the when result makes saw blade inclination sawing receives than limitations.

Retrieval is found; The disclosed electric circular saw of one Chinese patent application that application number is 200920160799.5, name is called a kind of hand-held electric circular saw comprises the hand-held housing of built-in motor and gear-box, is provided with first power transmission shaft and second power transmission shaft in the gear-box, and first power transmission shaft, one end is fixed with first roller gear with the engagement of rotor tooth; The other end is fixed with a cone pinion; Second power transmission shaft, one end be fixed with one with the large bevel gear of cone pinion engagement, the other end is fixed with second roller gear, second roller gear and the three cylindrical meshed transmission gear that is provided with thereunder; The three cylindrical gear is fixed on the output shaft, and an end of output shaft is saw blade fixedly.The electrical axis of this electric circular saw is vertical with saw blade, therefore can reduce the inclination angle restriction of a direction inclination of saw blade sawing in theory greatly.Yet; The inclination angle of another direction of saw blade still is restricted, and because the electrical axis of this moment obviously departs from the sawing face at saw blade place, so the application of force direction during sawing and sawing resistance be not in same vertical guide; Thereby form the moment of torsion that makes saw blade produce movement tendency, influence the sawing quality.The operator must through to operating grip control correction, the result has increased operation easier.

The utility model content

The purpose of the utility model is: to the shortcoming that above-mentioned prior art exists, improve through transmission mechanism, proposes a kind ofly can when limit at the sawing inclination angle that reduces to tilt, reduce the hand-held electric circular saw of offset torque.

In order to reach above purpose; The utility model hand-held electric circular saw contains the base plate that supports rotatable saw blade, and said saw blade is connected with drive of motor through transmission mechanism, and said motor is positioned at casing; Said casing is provided with handle; Said transmission mechanism is for through the other steering gear of transition of putting, and the rotation of said motor is perpendicular to the rotation of said saw blade, and is arranged in apart from the vertical guide of the 30 millimeters scopes in said saw blade surface.

Like this, owing to turn to the rotation of the rotation of transmission rear motor, make the electric circular saw main body depend primarily on the radial dimension (being significantly less than its axial dimension) of motor in the size of saw blade thickness direction perpendicular to saw blade; The main body gabarit is to the restriction at inclination angle when therefore having reduced saw blade inclination sawing; Meanwhile, put transition through the side, the rotation of motor can be as required near the saw blade surface; Therefore make easily the handle application of force direction that is positioned on the motor with near sawing face; Thereby the minimizing offset torque, handled easily helps guaranteeing the sawing quality.

The utility model further improves, and the vertical symmetrical centre face of said handle is arranged in apart from the vertical guide of the 30 millimeters scopes in said saw blade surface.

Further perfect of the utility model is that the rotation of said motor is positioned at said saw blade thickness place planar range.

The utility model further improves again, and the vertical symmetrical centre face of said handle is positioned at said saw blade thickness place planar range.

The improved main beneficial effect of the utility model said structure is:

1) rotation of motor is near plane, saw blade thickness place; Balance is good, has reduced the inclination restriction to saw blade simultaneously, and especially the rotation when motor is positioned at saw blade thickness place planar range; All the more so, this moment, saw blade all significantly increased with the angle that is tilted to the right left;

2) the vertical symmetrical centre face of electric machine rotational axis line and handle is positioned at saw blade thickness place planar range; Can make the cutting resistance direction that the application of force and saw blade receive that presses down in center of gravity, when operation of electric circular saw main body coincide with same plane basically; Depart from moment of torsion thereby avoid producing, be convenient to guarantee the sawing quality.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the structural representation of the utility model embodiment one.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the A-A cutaway view of Fig. 1.

The specific embodiment

Embodiment one

The hand-held electric circular saw of present embodiment is as shown in Figure 1, supports rotatable saw blade 2 on the base plate 1, and the top of this saw blade is secure shroud 3, and movable shield 4 is equipped with in the bottom, and central shaft is in transmission connection through transmission mechanism and the motor 5 that is positioned at casing 6.The output shaft of this motor is in transmission connection through putting transition axis 7 as the cylindrical gear pair 8 of first order deceleration transmission with the side; This side is put transition axis 7 and is in transmission connection through conical gear secondary 9 and saw blade axis 10 as second level deceleration transmission; Thereby realize the rotation D of the rotation B of motor 5, and be positioned at saw blade 2 thickness place planar range perpendicular to saw blade 2.The length of adjustment saw blade axis and other parameter of putting transition axis are not difficult to realize that the rotation with motor 5 is controlled in the vertical guide of surperficial 30 millimeters of saw blade.

Handle 11 front ends that are positioned on the casing 6 are connected as a single entity towards the secure shroud 3 that extends below with saw blade 2, and the casing 6 at rear end lower and motor 5 places is connected as a single entity.The vertical symmetrical centre face C of handle 11 is positioned at saw blade 2 thickness place planar range.The front end of handle also extends secondary handle 12 forward.

Facts have proved; Because hand-held electric circular saw electric machine rotational axis line, the vertical symmetrical centre face of handle and the saw blade mid-depth plane of present embodiment overlap basically; Therefore eliminated the additional torque that produces in the cutting operation process; Improve the balance of electric circular saw complete machine, reduced the difficulty of cutting operation, improved the comfortableness of operation.

Claims

1. hand-held electric circular saw; Contain the base plate that supports rotatable saw blade, said saw blade is connected with drive of motor through transmission mechanism, and said motor is positioned at casing; Said casing is provided with handle; It is characterized in that: said transmission mechanism is for through the other steering gear of transition of putting, and the rotation of said motor is perpendicular to the rotation of said saw blade, and is arranged in apart from the vertical guide of the 30 millimeters scopes in said saw blade surface.

2. hand-held electric circular saw according to claim 1 is characterized in that: the vertical symmetrical centre face of said handle is arranged in apart from the vertical guide of the 30 millimeters scopes in said saw blade surface.

3. hand-held electric circular saw according to claim 1 and 2 is characterized in that: the rotation of said motor is positioned at said saw blade thickness place planar range.

4. hand-held electric circular saw according to claim 3 is characterized in that: the vertical symmetrical centre face of said handle is positioned at said saw blade thickness place planar range.

5. hand-held electric circular saw according to claim 4 is characterized in that: the output shaft of said motor is put transition axis through cylindrical gear pair and side and is in transmission connection, and said side is put transition axis and is in transmission connection with saw blade axis through conical gear is secondary.

6. hand-held electric circular saw according to claim 5 is characterized in that: said handle front end is connected as a single entity towards the secure shroud that extends below with saw blade, and the casing at rear end lower and motor place is connected as a single entity.