CN110014190B

CN110014190B - Portable cutting machine

Info

Publication number: CN110014190B
Application number: CN201910319501.9A
Authority: CN
Inventors: 沃伦·布朗; 哈利·索默; 格雷厄姆·格哈德
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2012-07-13
Filing date: 2012-07-13
Publication date: 2021-09-07
Anticipated expiration: 2032-07-13
Also published as: CN103537753A; CN110014190A

Abstract

The present invention provides a portable cutting machine, comprising: a housing; a motor housed in the housing; the cutting unit is connected with the shell and comprises a saw blade, an upper shield and a lower shield, wherein the saw blade is arranged on the saw blade shaft and driven by a motor to rotate, the upper shield is fixedly connected with the shell, and the lower shield rotates around the axis of the saw blade shaft to expose the saw blade; the lower shield is rotatably arranged on the saw blade shaft. The lower shield is rotatably arranged on the saw blade shaft, and the diameter of the hub on the lower shield can be reduced by the arrangement, so that the usable part of the saw blade is increased, and the cutting capacity of the whole portable cutting machine is improved.

Description

Portable cutting machine

The invention is a divisional application of Chinese invention patent application with application number 201210243830.8, named as 'portable cutter', applied by the applicant at 7/13/2012.

Technical Field

The invention relates to a power tool, in particular to a portable cutting machine.

Background

Conventional portable cutting machines, such as portable electric circular saws, generally include a circular saw blade for processing a workpiece, a motor for driving the circular saw blade, the motor being rotatably disposed within a housing, and a main handle for holding the hand of an operator during operation. The electric circular saw comprises a bottom plate, an upper shield and a lower shield, wherein the upper shield is positioned at the upper part of the bottom plate and is fixedly connected with a shell, and the upper part of a saw blade is received in the upper shield at any time; the lower shield is positioned below the bottom plate, and when the saw blade fixing device works, the lower shield can rotate to expose the lower part of the saw blade. The conventional electric circular saw has disadvantages in that: the lower guard is rotatably provided on the housing, so that the diameter of the hub connected to the housing is large, and the large diameter of the hub reduces the usable portion of the circular saw blade, thereby reducing the cutting ability of the entire portable cutting machine.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: a portable cutter having a large cutting ability is provided.

In order to solve the above problems, the present invention provides a portable cutting machine including: a housing; a motor housed in the housing; the cutting unit is connected with the shell and comprises a saw blade, an upper shield and a lower shield, wherein the saw blade is arranged on a saw blade shaft and driven by a motor to rotate, the upper shield is fixedly connected with the shell, and the lower shield rotates around the axis of the saw blade shaft to expose the saw blade; a bottom plate connected with the upper shield, the bottom plate being provided with a saw blade through hole for passing a saw blade therethrough, and the bottom plate further including a bottom plate bottom for abutting against a workpiece and a bottom plate front side wall extending upward from the bottom plate bottom; the lower shield is rotatably arranged on the saw blade shaft.

In the portable cutting machine disclosed by the invention, the lower shield is rotatably arranged on the saw blade shaft, so that the diameter of the hub on the lower shield can be reduced, the usable part of the saw blade is increased, and the cutting capacity of the whole portable cutting machine is further increased.

Preferably, the lower guard is mounted on the saw blade shaft for rotation by a bearing.

Preferably, a friction pad which is abutted against the surface of the workpiece is arranged on the front side wall of the bottom plate.

Preferably, the friction pad comprises a curved surface which abuts against the surface of the workpiece.

Preferably, the housing includes a housing front portion connected to the upper shield, a housing rear portion extending lengthwise, and a holding portion located between the housing front portion and the housing rear portion, wherein the motor is rotatably disposed at the housing rear portion, and the saw blade shaft is disposed perpendicular to the motor output shaft.

Preferably, the portable cutting machine includes a bracket coupled to the base plate, the upper shield is rotatably coupled to the bracket through a first axis parallel to the saw blade shaft for adjusting a cutting depth, and the upper shield is movable between a minimum cutting position where the saw blade does not expose the saw blade through hole and a maximum cutting position where the saw blade exposes the saw blade through hole to a maximum depth.

Preferably, in the maximum cutting position, the angle between the lengthwise extension axis of the grip portion and the bottom of the base plate is not greater than 20 degrees.

Preferably, the bracket is provided with a first guide groove, the first guide groove is an arc-shaped guide groove, and the circle center corresponding to the arc where the first guide groove is located on the first axis.

Preferably, the upper shield and the first guide groove are respectively disposed at both sides of the front portion of the housing.

Preferably, the support is connected with the bottom plate in a rotatable manner around a second axis parallel to the bottom of the bottom plate and used for adjusting the cutting angle, a second guide groove is formed in the support and is an arc-shaped guide groove, and the circle center corresponding to the arc where the second guide groove is located on the second axis.

Drawings

The present invention is described in further detail below with reference to the attached drawings.

Fig. 1 is a perspective view of a portable cutter according to the present invention.

Fig. 2 is a partially exploded perspective view of the portable cutting machine disclosed in fig. 1.

Fig. 3 is a sectional view taken along a-a in fig. 1.

Fig. 4 is a partially exploded perspective view of the portable cutting machine disclosed in fig. 1.

Fig. 5 is a front view of the portable cutter disclosed in fig. 1, when the portable cutter is in a minimum cutting position.

Fig. 6 is a front view of the portable cutter disclosed in fig. 1, when the portable cutter is in a maximum cutting position.

Fig. 7 is a perspective view of the portable cutting machine disclosed in fig. 1, viewed from the other side, in which a saw blade is disposed perpendicular to the bottom of the base plate.

Fig. 8 is a perspective view of the portable cutting machine disclosed in fig. 1, viewed from the other side, in which the saw blade is disposed obliquely to the bottom of the base plate.

Fig. 9 is a schematic view of the portable cutting machine disclosed in fig. 1 during plug-in cutting.

Fig. 10 is a schematic view of the portable cutting machine disclosed in fig. 1 during a plug-in cutting operation.

Fig. 11 is a schematic view of the portable cutting machine disclosed in fig. 1 during a plug-in cutting process.

Fig. 12 is a schematic view of the portable cutting machine disclosed in fig. 1 during a translation cutting operation.

In the figure:

30. portable cutter 32, housing 34, cutting unit

36. Base plate 40, front housing 42, rear housing

44. Handle 46, saw blade shaft 48, saw blade

50. Upper shield 52, lower shield 54, handle

56. Receiving portion 58, hub 60, bearing

62. Bearing inner ring 64, bearing outer ring 66, bottom of bottom plate

68a-d bottom plate front, rear, left and right side walls 70 saw blade through holes

72. Friction pad 76, first axis 78, locking mechanism

80. Bracket 82, bracket bottom

84a-c, front, rear, right side walls 86 of the bracket, mounting holes

88. Through hole 90, depth adjusting bracket 92, first guide groove

94. Handle 95, bolt 99, indicator

97. Threaded hole 98. second axis 100. locking mechanism

102. Bevel angle adjusting bracket 104, second guide groove 106, knob

108. Nut 110, bolt 111, connecting hole

112. Via 114, contact line 116, curved surface

200. Workpiece 300. workpiece

Detailed Description

Referring to fig. 1, a portable cutter 30 is provided according to an embodiment of the present invention. The portable cutter 30 includes a housing 32, a motor (not shown) accommodated in the housing 32, a transmission assembly (not shown) disposed in the housing 32 for transmitting power, a cutting unit 34 connected to the housing 32, a base plate 36 connected to the cutting unit 34, and a switch assembly (not shown) disposed on the housing 32 for controlling whether the motor is operated. In the description of the present invention, unless otherwise specified, directional terms such as front, rear, left, right, up, down, and the like are relative to the direction in which the portable cutter is normally used, such as defining the forward direction of the portable cutter as front, the direction opposite to the forward direction of the portable cutter as rear, and the like.

The power supply of the portable cutter 30 is an ac power supply, i.e., the motor is supplied with power by the ac power supply. Of course, the portable cutter 30 may also be powered by dc power, i.e. a battery pack is mounted on the portable cutter 30, and the motor is powered by the battery pack.

The motor may be a carbon brush motor, a brushless motor, etc., or may be an ac motor or a dc motor corresponding to the power source of the portable cutter 30. The motor has a motor output shaft (not shown in the drawings), and outputs the rotation of the motor by mounting a gear on the motor output shaft.

The housing 32 comprises a housing front 40 and an elongated housing rear 42, wherein the housing front 40 is connected to the cutting unit 34; the housing rear 42 is for accommodating the motor, and an air inlet (not shown) and an air outlet (not shown) are provided on the housing rear 42. The longitudinally extending axis of the housing rear portion 42 is E. The motor output shaft is disposed parallel to the longitudinally extending axis E of the housing rear portion 42.

The cutting unit 34 is disposed on one side of the housing front 40, and since the motor is disposed within the housing rear 42, away from the base plate 36, the housing front 40 has a greater space available on the other side, away from the cutting unit 34, for additional structure.

A connecting portion 44 is formed at a portion where the case front 40 and the case rear 42 are connected. In order to make more reasonable use of the structure of the connecting portion 44, the connecting portion 44 is designed as a grip portion 44 of the portable cutter 30, that is, a user operates the portable cutter 30 to perform a cutting work by holding the grip portion 44. When a user holds the holding part 44, a fulcrum is formed between the front part 40 and the rear part 42 of the housing, and the parts on both sides of the fulcrum are restricted by gravity, so that after the user holds the holding part 44, the portable cutting machine 30 is in a relatively stable state, the cutting operation is very easy, and the operation comfort is improved.

Of course, the holding portion is not limited to be formed on the connecting portion 44, and a holding portion may be additionally provided above the housing 32, and the holding portion is respectively connected to the housing front portion 40 and the housing rear portion 42, and other modifications are possible for those skilled in the art, but the invention is covered within the scope of the invention as long as the function and effect are the same or similar to the invention.

The longitudinally extending axis of the grip portion 44 may be substantially parallel to or coincident with the longitudinally extending axis E of the housing rear portion 42, and in the present embodiment, the longitudinally extending axis of the grip portion 44 and the longitudinally extending axis E of the housing rear portion 42 coincide with each other.

Referring to fig. 1 and 2, the cutting unit 34 includes a blade 48 mounted on a blade shaft 46 and rotated by a motor and a guard assembly. The guard assembly includes an upper guard 50 fixedly connected to the housing front 40 and a lower guard 52 that rotates about the axis F of the saw blade shaft 46. The upper shield 50 is used to cover the upper portion of the saw blade 48 and the lower shield 52 is used to cover the lower portion of the saw blade 48. Of course, the upper and

lower guards

50 and 52 may or may not completely cover the entire saw blade 48 depending on the safety requirements. In operation, the lower guard 52 is urged by the workpiece to rotate about the axis F of the blade shaft 46, thereby exposing the lower portion of the saw blade 48 for cutting the workpiece. The lower guard 52 is provided with a handle 54, and operation of the handle 54 rotates the lower guard 52 about the axis F of the blade shaft 46 to expose a lower portion of the saw blade 48.

Referring to fig. 2, the lower shroud 52 includes a receiving portion 56 for receiving the saw blade 48 and a boss 58 coupled to the receiving portion 56. The hub 58 is rotatably mounted directly on the blade axle 46, and this reduces the diameter of the hub 58, thereby increasing the usable portion of the saw blade 48 and increasing the cutting capacity of the overall portable cutting machine.

Referring to fig. 3, a bearing 60 is provided between the blade shaft 46 and the hub 58. The bearing 60 includes a bearing inner race 62 and a bearing outer race 64. The bearing outer race 64 is rotatable relative to the bearing inner race 62. The bearing inner race 62 is an interference fit with the saw blade shaft 46. The bearing outer race 64 is in interference fit with the hub 58. The saw blade shaft 46 has an axis F such that the lower guard 52 can smoothly rotate about the axis F of the saw blade shaft 46 but does not follow the rotation of the saw blade shaft 46.

Of course, the mounting manner of disposing the lower guard 52 directly on the blade shaft 46 or disposing it on the blade shaft 46 through the bearing 60 is not limited to the portable cutting machine illustrated in the present embodiment, and the mounting manner is also applicable to a lower guard cutting machine such as a general electric circular saw, a table-type miter saw, or the like, and can achieve the effect of increasing the cutting ability.

The transmission assembly is coupled to the motor output shaft to transmit power from the motor output shaft to the saw blade 48 via the saw blade shaft 46. The saw blade 48 is mounted at one end of the saw blade shaft 46, and the other end of the saw blade shaft 46 can be directly coupled with the gear of the motor output shaft through the gear, so that the motor drives the saw blade shaft 46 to rotate. Of course, a reduction gear or the like may be provided between the motor output shaft and the saw blade shaft 46, and will not be described in detail herein for reasons of brevity. The axis F of the saw blade shaft 46 is disposed perpendicular, or substantially perpendicular, to the axis of the motor output shaft.

Referring to fig. 4, the base plate 36 includes a base plate bottom 66, which is configured to abut the base plate bottom 66 against a surface of a workpiece during operation. The floor front, rear, left and right side walls 68a-d generally circumscribe and extend upwardly from the floor bottom 66. The bottom plate portion 66 is provided with a blade through hole 70, and the blade through hole 70 is used for allowing the saw blade 48 to pass therethrough. The outside of the bottom plate front side wall 68a is provided with a friction pad 72. The specific function of the friction pad 72 will be described in detail later.

The portable cutter 30 is provided with a depth adjusting mechanism for changing the depth of cutting. The depth adjustment mechanism housing 32 and the housing 32 and cutting unit 34 are pivotable together about a first axis 76 and locked by a locking mechanism 78 mounted on the housing 32. The first axis 76 is disposed parallel to the axis F of the saw blade shaft 46.

The portable cutter 30 includes a bracket 80 attached to the base plate 36. The bracket 80 includes a bracket bottom 82. Front, rear, and right side walls 84a-c extend upwardly from the frame bottom 82, with no side walls on the left side of the frame bottom 82, to facilitate passage of the saw blade 48 through the frame 80.

Symmetrically arranged mounting holes 86 are provided in the front side wall 84a of the bracket, and through holes 88 are provided in the front part 40 of the housing. A pin (not shown) passes through the mounting hole 86 and the through hole 88 such that the housing 32 and the cutting unit 34 pivot together about the first axis 76 defined by the pin. Of course, the bracket 80 and the housing front 40 may also be mounted by bolts, screws, rivets or other structures known to those skilled in the art.

The bracket 80 includes a depth adjustment bracket 90, the depth adjustment bracket 90 extending upwardly from one side of the bracket right side wall 84 c. The depth adjustment bracket 90 is provided with a first guide groove 92. The first guide slot 92 is an arc-shaped guide slot, and the center of the arc corresponding to the first guide slot 92 is located on the first axis 76.

The locking mechanism 78 includes a handle 94, a bolt 95 attached to the handle 94, and a threaded hole 97 provided in the housing front 40. A bolt 95 passes through the first guide slot 92 to engage the threaded hole 97. By rotating the handle 94, the bolt 95 is locked into the threaded hole 97, thereby locking the housing 32 and the cutting unit 34 relative to the bracket.

In the present embodiment, the upper shield 50 and the first guide groove 92 are respectively provided at both sides of the case front 40. With this arrangement, the handle 94 is convenient for the operator to use, and the length of the bolt can be reduced to increase the operability.

In order to facilitate observation of the cutting depth, a scale (not shown) for indicating the cutting depth is provided on the depth adjusting bracket 90 at a position close to the first guide groove 92, and an indicator 99 is provided on the bolt 95. Upon unscrewing the bolt 95, the operator moves the cutting member 36 such that the bolt 95 slides within the first guide slot 92, and the housing 32, the cutting unit 34, together with respect to the base plate 36 and the bracket 80, move about the first axis 76 to vary the depth of cut of the saw blade 48. The cutting angle can now be viewed through the indicator 99 and the scale provided on the depth adjustment bracket 90. Once the desired position is reached, the handle 94 may be rotated to clamp the cutting unit 34 in the desired position.

As shown in fig. 5 and 6, the cutting unit 34 moves about a first axis 76 between a minimum cutting position and a maximum cutting position. As shown in FIG. 5, in the minimum cutting position, the blade 48 does not pass through the blade through hole 70 in the bottom plate 36 and the distance between the blade shaft 46 and the bottom plate 36 is maximized. As shown in FIG. 6, in the maximum cutting position, the blade 48 extends through the blade opening 70 in the base plate 36 and the distance between the blade shaft 46 and the base plate 36 is minimized. In this position, the angle between the longitudinally extending axis E of the gripping portion 44 and the base plate 36 is no greater than 20 degrees, which greatly improves operator comfort.

Referring again to fig. 4, the portable cutter 30 is also provided with a bevel angle adjusting structure for changing the angle of cutting. The bevel angle adjustment structure allows the housing 32 and the cutting unit 34 to pivot together about the second axis 98 and be secured by a locking mechanism 100 mounted on the base plate 36. The second axis 98 is disposed parallel to the floor bottom 66.

The bracket 80 includes a bevel angle adjustment bracket 102, the bevel angle adjustment bracket 102 extending upwardly from one side of the bracket front side wall 84 a. The bevel angle adjusting bracket 102 is provided with a second guide groove 104. The second guide groove 104 is an arc-shaped guide groove, and the center of the circle corresponding to the arc where the second guide groove 104 is located on the second axis 98.

The locking mechanism 100 includes a knob 106, a nut 108 coupled to the knob 106, and a bolt 110 that mates with the nut 108. The bolt 110 is inserted through the through hole in the front side wall 68a of the base plate and the second guide groove 104 to engage the nut 110. The knob 106 is tightened, thereby locking the housing 32 and the cutting unit 34 relative to the base plate 36.

The front and

rear side walls

84a and 84b of the bracket are provided with symmetrically arranged connecting holes 111, and the front and

rear side walls

68a and 68b of the base plate are respectively provided with through holes 112 (only the through hole on the rear side wall 68b of the base plate is marked in the figure). Two pins (not shown) are inserted through the adjacent attachment holes 111 and through holes 112, respectively, such that the bracket 80, the housing 32, and the cutting unit 34 pivot together about the pin-defined second axis 98. Of course, the bracket 80 and the base plate 36 may also be mounted by bolts, screws, rivets or other structures known to those skilled in the art.

In order to facilitate the observation of the cutting angle, the bevel angle adjusting bracket 102 is provided with a scale (not shown) for indicating the cutting angle at a position close to the second guide groove 104, and a pointer is provided on the bottom plate front side wall 68 a. Upon unscrewing of the knob 106, the bolt 110 slides within the second guide slot 104 such that the housing 32, the cutting unit 34, and the carriage 80 are movable about the second axis 98 relative to the base plate 36 to change the cutting angle of the saw blade 48. The cutting angle of the portable cutter 30 can be observed by the pointer provided on the front side wall 68a of the base plate at this time. Once the desired position is reached, knob 106 may be tightened to clamp and hold cutting unit 34 in the desired position.

As is apparent from the above description, the bracket 80 includes the depth adjustment bracket 90 and the bevel angle adjustment bracket 102, that is, both the first guide groove 92 for depth adjustment and the second guide groove 104 for bevel angle adjustment are provided on the bracket 80. With this configuration, the processing cost can be reduced, and the rigidity of the holder 80 and the processing accuracy of the portable cutter 30 can be increased.

As shown in FIG. 7, when the blade 48 is perpendicular to the base 66, the frame front, rear, and right side walls 84a-c are surrounded by a perimeter generally bounded by the base front, rear, left, and right side walls 68a-d, and the frame front, rear, and right side walls 84a-c are proximate the inner sides of the base front, rear, and

right side walls

68a, 68b, and 68d, respectively. At this point, the bracket bottom 82 is proximate to the floor bottom 66. As shown in FIG. 8, when the knob 106 is loosened, the bolt 110 slides in the second guide slot 104, and the bracket 80 moves rotationally about the second axis 98, the bracket front, rear and right side walls 84a-c disengage from the inner sides of the base plate front, rear and

right side walls

68a, 68b and 68 d. The angle formed between the bracket bottom 82 and the bottom plate bottom 66 is equal to the angle formed between the saw blade 48 and the bottom plate bottom 66, i.e., the angle of the oblique cut of the saw blade 48.

Portable cutter 30 has a translation cut and an insertion cut. In plunge cutting, the motor is activated, as shown in FIG. 9, to urge the friction pad 72 against the surface of the workpiece 200, with the operator holding the grip portion 44 in one hand and operating the handle 54 in the other hand to rotate the lower guard 52 relative to the upper guard 50 about the axis F of the saw blade shaft 46; next, as shown in fig. 10, the operator holds the grip portion 44 with his hand and applies a pressing force to the grip portion 44, and at this time, rotates the portable cutter 30 with the contact line 114 of the friction pad 72 and the workpiece 200 as a rotation axis, so that the entire portable cutter 30 rotates clockwise; during rotation, the lower guard 52 may be further rotated about the axis F of the saw blade shaft 46 by the handle 54 or by the workpiece 200 so that the saw blade 48, with the lower guard 52 exposed, may be used to machine a workpiece. In this manner, the operator can cut a groove at the intermediate position of the workpiece 200. Referring to fig. 11, the portable cutter 30 rotates clockwise until the bottom 66 of the base plate completely fits the surface of the workpiece 200, and the portable cutter 30 can be pushed forward to cut the workpiece, so that the portable cutter 30 can machine a long slot with a certain length.

Referring again to FIG. 11, the friction pad 72 is typically made of a wear-resistant, non-slip material, such as rubber, silicone, or the like. The friction pad 72 prevents the shoe 36 from sliding on the surface of the workpiece 200 and hindering the cutting operation; and the friction pad 72 can be prevented from damaging the surface of the workpiece 200 during the rotation of the portable cutter 30.

The friction pad 72 includes a curved surface 116 that contacts the surface of the workpiece 200. The curved surface 116 may be a circular arc surface or at least a portion of a circular arc surface. The curved surface 116 facilitates the rotation of the portable cutter 30, so that the rotation is stable; but also better protects the surface of the workpiece 200 during rotation of the portable cutter 30.

The friction pad 72 is spaced from the floor bottom 66, although smaller gaps facilitate rotation of the portable cutter 30. The friction pad 72 is spaced from the bottom plate 66 by a gap that is: when the bottom plate 66 is attached to the surface of the workpiece 200, a certain gap L is formed between the lowest end of the friction pad 72 and the surface of the workpiece 200, so that the friction pad 72 does not contact with the surface of the workpiece 200 to affect the pushing of the portable cutter 30 during the pushing of the portable cutter 30 along the surface of the workpiece 200.

Of course, the friction pad 72 is provided on the bottom plate 36 to facilitate the operator's insertion cutting, and is not limited to the portable cutter as illustrated in the present embodiment, and is also applicable to a conventional electric circular saw or the like, and can also achieve the effect of insertion cutting.

In a translational cutting operation, as shown in fig. 12, the switch assembly activates the motor to push the bottom plate 66 against the surface of the workpiece 300, so as to push the portable cutting machine 30 along the surface of the workpiece 300 in parallel, and during the pushing, the workpiece 300 pushes the lower guard 52 to further rotate around the axis F of the saw blade shaft 46, so that the saw blade 48 of the lower guard 52 is exposed for machining. This allows the cutting operation to be started at one end of the workpiece 200. By further pushing the portable cutter 30 forward to cut the workpiece, a long groove having a certain length can be formed or the workpiece 200 can be cut.

The present invention is not limited to the above-described embodiments, and other modifications are possible in the technical spirit of the present invention by those skilled in the art, and all that can be achieved is intended to be covered by the scope of the present invention as long as the functions achieved are the same as or similar to those of the present invention.

Claims

1. A portable cutting machine, its characterized in that: the portable cutter includes:

a housing;

a motor housed within the housing, the motor for driving a saw blade to rotate about an axis of a saw blade shaft, the motor having a motor output shaft;

the cutting unit is connected with the shell and comprises an upper shield fixedly connected with the shell and a lower shield which rotates around the axis of the saw blade shaft to expose the saw blade; the cutting unit can rotate around a first axis defined by the pin shaft and is used for adjusting the cutting depth;

the housing comprises a housing front connected with the upper shield, a housing rear extending lengthwise, and a grip portion between the housing front and the housing rear; the bottom plate is connected with the upper shield and is provided with a saw blade through hole for a saw blade to pass through;

the support, with the bottom plate is connected, the support includes the degree of depth regulation support, be equipped with first guide slot on the degree of depth regulation support, first guide slot is the arc guide slot, and the centre of a circle that the circular arc at first guide slot place corresponds is located the first axis, the round pin axle set up in the left side of casing, first guide slot set up in the right side of casing is being close to the position of first guide slot is provided with the scale that marks the depth of cut, and will through installing locking mechanical system on the casing the degree of depth regulation support locking, locking mechanical system is including setting up the handle in the first guide slot outside.

2. The portable cutter according to claim 1, characterized in that: the pin shaft is arranged on the left side of the front portion of the shell, and the depth adjusting support is arranged on the right side of the front portion of the shell.

3. The portable cutter according to claim 2, characterized in that: the motor is accommodated in the rear portion of the housing.

4. The portable cutter according to claim 1, characterized in that: the axis of the saw blade shaft is perpendicular to the axis of the motor output shaft.

5. The portable cutter according to claim 1, characterized in that: the locking mechanism further comprises a bolt connected to the handle, and the bolt penetrates through the first guide groove to be matched with a threaded hole formed in the shell.