Electric cutting machine

Abstract

The utility model relates to an electric cutting machine, and belongs to the technical field of electric tools. The cutting machine comprises a rotary cutting tool driven by a motor, one side of a barrel-shaped machine shell of the motor extends in the direction perpendicular to the axis of the motor to form a one-piece grab handle half shell, and the one-piece grab handle half shell and a split grab handle half shell are fixedly connected in an involution mode to form an integral grab handle. According to the utility model, the structure that a traditional motor shell is fixedly connected with the grab handle through a flange screw is changed, the vertical size of the shell is reduced, the reference position for initial cutting is moved upwards to increase the cutting depth, the limitation of the flange on the deflection angle of the grab handle operation is avoided, the deflection angle range of the grab handle operation is effectively enlarged, and the working efficiency is improved. Therefore, the operation adaptability is obviously improved.

Description

Technical Field

[0001] The utility model relates to a cutting machine, in particular to an electric cutting machine, belonging to the technical field of tools. Background Art

[0002] An electric rotary cutting tool is a commonly used electric tool, and its typical structure is disclosed in the Chinese patent document with application number 201110039109.2, which includes a base placed on a workpiece to be cut and a tool body supported on the upper surface of the base. The tool body includes a rotary cutter driven and rotated by an electric motor. The height dimension of the electric motor relative to the base is set such that the output shaft of the electric motor is located on the upper side of the main shaft on which the rotary cutter is installed. The housing of the electric motor has a flat cylindrical shape with large vertical dimensions and small front-to-back dimensions. The housing has a cylindrical shape with no change in thickness in the axial direction of the output shaft. Since the existing electric cutting machines generally adopt a structure in which the motor housing is fixedly connected to the handle by peripheral flange bolts, the deflection angle of the operating handle during use is limited by the flange structure. When using a cutting saw blade with a smaller diameter, the large vertical dimensions of the housing will affect the position of the base corresponding to the workpiece surface, thereby affecting the cutting depth and the deflection angle of the operating handle, which is often difficult to meet the use requirements. Utility Model Content

[0003] The purpose of the utility model is to improve the structure of the electric cutting machine, which can reduce the upper and lower dimensions of the casing to increase the cutting depth and the deflection angle of the operating handle, so as to make it have more ideal operational adaptability.

[0004] In order to achieve the above purpose, the basic technical solution of the electric cutting machine of the utility model is: it includes a rotating cutting tool driven by a motor, and a one-piece handle half shell extends from one side of the cylindrical casing of the motor in a direction perpendicular to the motor axis, and the one-piece handle half shell is fixedly connected with the split handle half shell to form an integral handle.

[0005] The utility model changes the traditional structure of fixing the motor casing with the handle by means of flange screws, reduces the upper and lower dimensions of the casing, moves the reference position of the starting cutting upward to increase the cutting depth, avoids the limitation of the flange on the operating deflection angle of the handle, effectively increases the deflection angle range of the operating handle, and thus significantly improves the operational adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The utility model is further described below in conjunction with the accompanying drawings.

[0007] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model.

[0008] Figure 2 yesFigure 1 Rear view of.

[0009] Figure 3 yes Figure 2 AA cross-sectional structure schematic diagram.

[0010] Figure 4 yes Figure 1 Schematic diagram of the three-dimensional exploded structure of an embodiment.

[0011] Figure 5 yes Figure 1 Schematic diagram of the limit deflection angle of the operating handle in the embodiment.

[0012] Figure 6 yes Figure 5 Rear view of. DETAILED DESCRIPTION Embodiment 1

[0013] The overall structure of the electric cutting machine in this embodiment is as follows Figure 1 As shown, a stator 3 is installed in a cylindrical housing 2, and its two ends are respectively fixedly connected to a rear cover 1 and a gear box cover 6. A rotor 4 located in the stator 3 is supported between the rear cover 1 and the gear box 6. The output end of the rotor 4 is connected to a motor gear 5 installed in the gear box 6. The motor gear 5 is meshed with a large gear 8 on an output shaft 10 supported by bearings 7 and 9 on the gear box 6. The output end of the output shaft 10 is pressed by an outer flange 12 through a flange screw 11. A saw blade 13 serving as a rotating cutting tool is clamped and fixed between the outer flange 12 and an inner flange 14 axially positioned at the diameter expansion step of the output shaft 10.

[0014] A one-piece handle half shell 2-1 is extended from one side of the cylindrical housing 2 in a direction perpendicular to the motor axis. The one-piece handle half shell 2-1 is fixedly connected with the split handle half shell 18 to form an integral handle. A switch 19 is arranged between the one-piece handle half shell 2-1 and the split handle half shell 18.

[0015] In addition, the housing 2 is provided with a shaft lock 17 which is in a raised position under the action of a spring at a concave position corresponding to one end of the large gear 8. The lower end of the shaft lock 17 can be inserted into the concave position when the upper end of the shaft lock is pressed, thereby limiting the rotation of the large gear 8. A pressure plate 15 for pressing the shield 16 is provided at the diameter expansion step of the output shaft 10.

[0016] When the electric cutting machine of this embodiment is used for cutting, Figure 5 and Figure 6As shown, since the casing and the handle do not need to be fixedly connected by means of a flange structure, the structural dimensions of the casing are very compact. The starting cutting workpiece surface B is relatively high relative to the saw blade, thus increasing the cutting depth h. And because there is no flange to limit the deflection angle a of the handle operation, the result is that the deflection angle range of the operating handle is effectively increased, and the operation adaptability is better. The outer diameter of the saw blade in this embodiment is 4 inches. In practice, for such small outer diameter rotary cutting tools with an outer diameter of the rotary cutting tool less than or equal to 4 inches, since their own cutting depth is originally limited, the structure of this embodiment is more practical.

[0017] In addition to the above embodiments, the present utility model may also have other implementation manners. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope required by the present utility model.

Claims

1. An electric cutting machine, comprising a rotary cutting tool driven by a motor, characterized in that: A one-piece handle half shell is extended from one side of the cylindrical housing of the motor in a direction perpendicular to the axis of the motor, and the one-piece handle half shell is coupled and fixedly connected with the split handle half shell to form an integral handle.

2. The electric cutting machine according to claim 1, characterized in that: The outer diameter of the rotary cutter is less than or equal to 4 inches.

3. The electric cutting machine according to claim 2, characterized in that: A stator is installed in the casing, and its two ends are respectively fixedly connected to the rear cover and the gear box cover; a rotor located in the stator is supported between the rear cover and the gear box, and the output end of the rotor is connected to the motor gear installed in the gear box, and the motor gear is meshed with a large gear supported on the output shaft of the gear box.

4. The electric cutting machine according to claim 3, characterized in that: The output end of the output shaft is pressed against an outer flange by a flange screw, and a saw blade serving as a rotating cutting tool is clamped and fixed between the outer flange and an inner flange axially positioned at the output shaft diameter expansion step.

5. The electric cutting machine according to claim 4, characterized in that: The housing is provided with a shaft lock tending to a raised position at a recessed position corresponding to one end of the large gear. The lower end of the shaft lock can be inserted into the recess when the upper end of the shaft lock is pressed to limit the rotation of the large gear.

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