WO2019047951A1

WO2019047951A1 - Electric saw

Info

Publication number: WO2019047951A1
Application number: PCT/CN2018/104854
Authority: WO
Inventors: 钟红风; 马一纯; 陈锋
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2017-09-08
Filing date: 2018-09-10
Publication date: 2019-03-14
Also published as: CN109465492B; CN109465492A

Abstract

An electric saw (10), comprising a housing (20), a motor, and a bottom plate (24) connected to the housing (20) and used to support the housing (20). The bottom plate (24) is movably connected to a guide member (46). The guide member (46) comprises a guide surface (48). The guide member (46) moves relative to the bottom plate (24), and comprises a first position not emerging from a bottom surface (26) of the bottom plate (24) and a second position at least partly emerging from the bottom surface (26) of the bottom plate (24). When in the second position, the guide surface (48) of the guide member (46) is coplanar with the plane of a saw blade (22) and is able to match a guiding surface (81) of a guide device (80) to guide a cutting direction. When using the electric saw, a user can choose an existing plank of wood and press the guide surface (48) of the guide member (46) against a lateral side of the plank of wood, so that guiding is achieved without purchasing a dedicated guide rail. The electric saw is low-cost and easy to store.

Description

Chainsaw

Technical field

The invention relates to a power saw.

Background technique

A chainsaw is a commonly used electric tool for cutting workpieces by saw blades. When it is necessary to cut on the workpiece, the operator can cut the saw blade along the cutting line previously marked on the workpiece, but the operator often fails to ensure the cutting precision and the work efficiency due to human factors during the cutting process. Also relatively low.

One existing solution is to use a guide bar for guiding. When cutting, one side of the bottom plate of the chainsaw parallel to the saw blade is abutted against the guiding surface of the guide ruler, and then the electric saw is moved to cut and ensure This side of the bottom plate of the chainsaw always moves along the guiding surface, which can avoid the problem of low cutting precision and low working efficiency due to human factors. However, this solution also has problems. Since the bottom plate of the chainsaw has a certain width and the blade has a certain distance from the side of the bottom plate, the guide surface of the guide rule cannot be directly cut with the mark marked on the workpiece. Aligning the lines, but first measuring the distance between the saw blade and the side edges of the bottom plate, and then fixing the guide bar at a position equal to the distance between the guiding surface and the cutting line, which is troublesome to operate, especially in When performing a cutting that requires constant change of the position of the guide bar, the working efficiency is low; and since the measurement and the position of the guide bar are set according to the measurement result, there may be a certain error, so the actual cutting result of the chainsaw may have some deviation from the cutting line. Cutting accuracy is low.

Summary of the invention

To overcome the deficiencies of the prior art, the problem to be solved by the present invention is to provide a power saw that is convenient to use.

An electric saw for cutting in cooperation with a guiding device, the guiding device having a guiding surface, the electric saw comprising: a housing; a motor received in the housing; and a transmission mechanism connected to the motor Rotating the saw blade; the saw blade is supported by the saw blade shaft, having a saw blade plane; a bottom plate connected to the housing for supporting the housing, the bottom plate having a bottom surface and the saw blade for wearing The bottom plate further includes a first side and a second side perpendicular to the saw blade axis, defining a first plane passing through the first side and perpendicular to the bottom surface; a second side and perpendicular to the bottom surface is a second plane; wherein the electric saw further includes a guiding member, the guiding member is located in a space defined by the first plane and the second plane, The guide member includes a guide surface; the guide member is movably coupled to the bottom plate, has a first position that does not extend beyond the bottom surface of the bottom plate, and a second position that at least partially extends beyond the bottom surface of the bottom plate; a guiding surface of the guiding member and the The saw blades are coplanar in plane for mating with the guide faces.

Further, the end surface of the saw blade adjacent to the transmission mechanism is defined as a first side cutting plane, the end surface of the saw blade away from the transmission mechanism is a second side cutting plane; and in the second position, the guiding surface is The first side cutting plane is coplanar.

Further, two guiding members are connected to the bottom plate, and the two guiding members are arranged at two ends of the saw blade in a direction perpendicular to the saw blade axis.

Further, the electric saw further includes adjustment means for adjusting a position of the guide relative to the bottom plate such that the guide surface is coplanar with the saw blade plane in the second position.

Further, the bottom plate is provided with a through hole, and the guiding member passes through the through hole to cooperate with the guiding surface when the guiding member moves relative to the bottom plate.

Further, the guide member is slidably coupled to the bottom plate.

Further, the guide member is rotatably coupled to the bottom plate about a first axis parallel to the saw blade axis.

Further, the guiding member includes a guiding portion and a connecting portion which are fixedly connected; the guiding surface is disposed on the guiding portion; the connecting portion is provided with a threaded hole, and the bottom plate is correspondingly provided with the connecting portion a threaded hole mating bolt, the axis of the bolt being the first axis;

The guide moves between the first position and the second position as the connecting portion rotates about the first axis.

Further, the chainsaw further includes a reset member for retaining the guide member in the first position.

Further, the resetting member is a tension spring, one end of the tension spring is fixedly connected to the bottom plate, and the other end of the tension spring is fixedly connected with the guiding member.

Further, the upper end of the bottom plate is provided with a rotating shaft, the axis of the rotating shaft is the first axis; the guiding member has a rotating hole matched with the rotating shaft, and the guiding member is rotatably sleeved on the On the shaft

a first positioning groove and a second positioning groove are disposed on the guiding member, and the bottom plate is provided with a first positioning member elastically connected to the bottom plate, the first positioning member has a first positioning groove and a first positioning portion matched by the second positioning groove;

When the first positioning portion is inserted into the first positioning slot, the guiding member is hidden in the bottom plate and located in the first position; when the first positioning portion is inserted into the second positioning slot, the The guide member passes through the through hole beyond the bottom surface of the bottom plate and is located at the second position.

Further, the first positioning portion has a tapered shape, and the first positioning groove and the second positioning groove are tapered grooves.

Further, the axes of the first positioning groove and the second positioning groove are perpendicular.

Further, the first positioning member is connected to the bottom plate by a spring.

Further, the upper end of the bottom plate is provided with a rotating shaft, the guiding member has a rotating hole matched with the rotating shaft, and the guiding member is rotatably sleeved on the rotating shaft;

a third positioning slot and a fourth positioning slot are disposed on the bottom plate, and the guiding member is provided with a second positioning member elastically connected to the guiding member, and the second positioning member has a third positioning slot a second positioning portion matching the fourth positioning groove;

When the second positioning portion is inserted into the third positioning slot, the guiding member is hidden in the bottom plate and located in the first position; when the second positioning portion is inserted into the fourth positioning slot, the A guide member extends downward through the through hole to a lower end of the bottom plate in the second position.

Further, a bottom surface of the bottom plate is provided with a groove, and in the first position, the guiding member is received in the groove; in the second position, the guiding member at least partially protrudes from the groove .

Further, the guide member is movably disposed on a side of the bottom plate parallel to the saw blade axis.

The power saw provided by the present invention includes a guide member movably coupled to the bottom plate; the guide member has a second position at least partially exposing the bottom surface of the bottom plate; and in the second position, the guide surface of the guide member is coplanar with the plane of the saw blade. During the cutting operation, the guiding surface of the guiding member can be directly pressed against the side surface of the existing wooden strip, which can not only achieve the guiding effect, but also does not need to purchase a dedicated guide rail, and has low cost and convenient storage.

DRAWINGS

Fig. 1 is a perspective view of a power saw according to a first embodiment of the present invention.

2 is a perspective view of the electric saw shown in FIG. 1 from another perspective.

Fig. 3 is a perspective view of the electric saw shown in Fig. 1 when it is beveled, and the viewing angle at this time is viewed from the front side of the chainsaw.

4 is a partial exploded view of the bottom plate of the electric saw shown in FIG. 1.

Figure 5 is a perspective view of the bottom plate portion of the electric saw shown in Figure 1, in which the guide member is in a second position partially beyond the bottom surface of the bottom plate;

Fig. 6 is a perspective view showing the state of use of the chainsaw shown in Fig. 1 when the guide member is in the second position.

Figure 7-1 is a schematic view showing the positional relationship between the electric saw and the guiding device in order to prevent the guiding device from being injured by the saw blade; Figure 7-2 is a partial enlarged view of A in Figure 7-1.

Figure 8 is a perspective view of the bottom plate portion of the electric saw shown in Figure 1, in which the guide member is in a first position that does not extend beyond the bottom surface of the bottom plate.

Fig. 9 is a schematic structural view of a power saw according to a second embodiment of the present invention.

Figure 10 is a schematic view showing the positional relationship between the guide member, the bottom plate and the wooden strip of Figure 9;

Figure 11 is a schematic view showing the structure of a power saw according to a third embodiment of the present invention.

Figure 12 is a schematic view showing the positional relationship between the guide member and the bottom plate of Figure 11;

Figure 13 is a view taken along line A-A of Figure 12;

Fig. 14 is a partial enlarged view of Fig. 13;

Fig. 15 is a view showing the working state of the guide member in the electric saw shown in Fig. 11.

Figure 16 is a schematic view showing the positional relationship between the guide member and the wooden strip in the electric saw shown in Figure 15.

Figure 17 is a B-B arrow view of Figure 16;

Fig. 18 is a schematic view showing the hidden state of the guide member in the electric saw shown in Fig. 11.

Figure 19 is a schematic view showing the positional relationship between the guide member and the wooden strip in the electric saw of Figure 18.

Figure 20 is a schematic view showing the positional relationship between the guide member and the bottom plate in the electric saw according to the fourth embodiment of the present invention.

Figure 21 is a partial enlarged view of Figure 20.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or the element may be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning meaning meaning The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

1 and 8 show a power saw 10 of a first embodiment of the present invention.

Referring to FIGS. 1 to 3, the present invention provides a power saw 10 including a housing 20, a motor (not shown) housed in the housing 20, a saw blade 22 driven by a motor through a transmission mechanism, and a housing. 20 connected bottom plate 24. In the description of the present invention, directional terms such as front, rear, left, right, up and down, etc., are relative to the direction in which the chainsaw 10 is normally used, as defined by the direction in which the chainsaw 10 is oriented, unless otherwise indicated. Before, the direction opposite to the advancing direction of the chainsaw 10 is the rear.

The housing 20 extends in the longitudinal direction as a whole, and houses a motor and a transmission mechanism therein. A transmission 17 is located between the motor and the saw blade 22 for transmitting power from the motor to the saw blade 22 to drive the saw blade 22 for rotational movement. The longitudinal extension of the housing 20 is parallel to the axis of the motor and the axis of the motor is disposed perpendicular to the axis of the blade shaft 19. Preferably, the centerline of the housing 20 is collinear with the axis of the motor. To improve the grip experience, the area of the housing 20 having a smaller radial dimension is designed as the handle 21.

The saw blade 22 in the present invention is a circular saw blade that is coupled to the saw blade shaft 19. Since the saw blade 22 has a certain thickness, the saw blade 22 has a plurality of saw blade planes in its thickness direction. Of course, the saw blade 22 can also be idealized, and the thickness of the saw blade 22 is considered to be extremely small, and the plane in which the saw blade 22 is located is the saw blade plane. In the following description, the saw blade plane defines the plane in which the saw blade 22 is located by idealizing the saw blade 22 to be of a very small thickness. The end face of the saw blade 22 near the transmission mechanism 17 is a first side cutting plane 27, and the end face remote from the transmission mechanism 17 is a second side cutting plane 29.

The bottom plate 24 is coupled to the housing 20 for supporting the housing 20 having a bottom surface 26 and an opening 28 through which the saw blade 22 passes. During the cutting operation, the bottom surface 26 abuts against the workpiece, and the saw blade 22 passes through the opening 28 to cut the workpiece.

Referring again to Figures 1 and 2, the bottom plate 24 is movably coupled to the housing 20. In the present invention, the bottom plate 24 is rotatably coupled to the housing 20 about a pivot axis X1. The pivot axis X1 is disposed perpendicular to the plane of the saw blade. As such, when the housing 20 rotates the saw blade 22 about the pivot axis X1, the distance that the saw blade 22 extends beyond the bottom surface 26 can be varied to change the depth of cut. A depth adjustment mechanism and a depth locking mechanism (not shown) are provided between the bottom plate 24 and the housing 20.

The depth adjustment mechanism includes a longitudinally extending fixed depth slide 31 disposed on one of the bottom plate 24 and the housing 20, and the other of the bottom plate 24 and the housing 20 is coupled to the fixed depth slide 31 The depth slider 33 is fixed. The depth-sliding rail 31 may be an arc-shaped guide rail whose center of the arc corresponding to the arc is located on the pivot axis X1. Of course, the extending direction of the deep slide rail 31 may also be substantially perpendicular to the bottom surface 26, and the fixed depth slide 33 slides within the fixed depth slide 31 to adjust the distance of the saw blade 22 from the bottom surface 26, thereby adjusting the saw blade 22. Cutting depth. The extending direction of the deep slide rail 31 is substantially perpendicular to the bottom surface 26 and does not require the deep slide rail 31 to extend in a straight line as long as it has a longitudinally extending direction substantially perpendicular to the bottom surface 26.

The constant depth locking mechanism maintains the depth-sliding member 33 in a specific position relative to the slide rail 31 such that the saw blade 22 extends a certain distance beyond the bottom surface 26 so that a groove of a particular depth can be cut into the workpiece. The fixed depth locking mechanism may be a conventional structure such as a thread locking mechanism, a cam locking mechanism, and the like, and details are not described herein.

Referring again to Figures 1, 3 and 4, the bottom plate 24 is movably coupled to the housing 20. In the present invention, the bottom plate 24 is rotatably coupled to the housing 20 about a bevel axis X2. The chamfered axis X2 is disposed parallel to the bottom surface 26 such that when the housing 20 rotates the saw blade 22 about the chamfer axis X2, the distance over which the saw blade 22 extends beyond the bottom surface 26 can be varied to change the cutting angle for bevel cut. A chamfering adjustment mechanism and a beveling locking mechanism (not shown) are also provided between the bottom plate 24 and the housing 20.

The beveling adjustment mechanism includes a longitudinally extending beveled slide rail 37 disposed on one of the bottom plate 24 and the housing 20, and the other of the bottom plate 24 and the housing 20 mated with the beveled slide rail 37 The slider 39 is chamfered. The extending direction of the chamfered slide rail 37 is substantially at an acute or obtuse angle with the bottom surface 26, and the chamfered sliding member 39 slides in the chamfered slide rail 37 to adjust the angle of the saw blade plane with respect to the bottom surface 26, thereby adjusting the cutting angle of the saw blade 22. . Preferably, the beveled slide rail 37 is an arc-shaped guide rail, and the center of the arc corresponding to the arc of the guide rail is located on the chamfering axis X2.

The beveled locking mechanism can maintain the beveled slide 39 in a particular position relative to the beveled slide 37, thereby maintaining the saw blade 22 at a particular angle relative to the bottom surface 26 for bevel cuts. The chamfer locking mechanism may be a conventional structure such as a thread locking mechanism, a cam locking mechanism, and the like, and details are not described herein.

Referring again to FIG. 1, the chainsaw 10 further includes a fixed shield 40 fixedly coupled to the housing 20, the fixed shield 40 covering a portion of the serrations of the saw blade 22 on the upper side of the bottom plate 24 to prevent injury. The bottom plate 24 is connected to the housing 20 through the fixed cover 40. The chainsaw 10 also includes a movable shroud 42 that is movably coupled to the housing 20 that covers another portion of the saw blade 22 on the underside of the bottom plate 24 when the saw 10 is not in use. Thus, when the chainsaw 10 is not in use, most of the saw teeth of the saw blade 22 are housed in the fixed shield 40 and the movable shield 42. When the chainsaw 10 is in use, the movable shroud 42 is pushed by the workpiece to expose a portion of the serrations of the saw blade 22 on the underside of the bottom plate 24, and the saw blade 22 can smoothly cut the workpiece. The movable shroud 42 is also provided with a moving shroud opening member 44. When the electric saw 10 is used, the operator can also manually push the opening member 44 to rotate the moving shroud 42 to expose the portion of the serration that it covers.

In the present invention, the housing 20, the depth adjusting mechanism, the deepening locking mechanism, the beveling adjustment mechanism, and the bevel locking mechanism are all disposed on the same side of the fixed cover 40.

Referring to FIGS. 4-8, the bottom plate 24 is movably provided with a guide member 46. During the cutting process, the guide member 46 cooperates with the guide 80 through a through hole 50 provided in the bottom plate 24 to guide the cutting operation.

The guiding device 80 may be made of plastic, which is common in life, or a wooden ruler having a guiding surface 81 that can be fitted with a cutting line previously marked on the workpiece W and capable of guiding the chainsaw 10 to move along the cutting line. . Of course, the guiding device 80 may also be other material having a guiding surface 81, such as a cut building material or the like having other materials that can serve as the guiding surface 81. Specifically, for example, a number of different types of standard wood are sold on the market. These standard woods have a very smooth guide surface 81 and are a very good source of guides.

The bottom plate 24 includes a first side 23 and a second side 25 that are perpendicular to the saw blade axis 19. A first plane passing through the first side 23 and perpendicular to the bottom surface 23 of the bottom plate is defined; a second plane passing through the second side 25 and perpendicular to the bottom surface 26 of the bottom plate. The guide 46 is located in a space defined by the first plane and the second plane and has a guide surface 48. In the present embodiment, the number of the guide members 46 is two, which are arranged at both ends of the saw blade 22 in a direction perpendicular to the saw blade axis 19. The guide member 46 is rotatably coupled to the bottom plate. In particular, the guide member is rotatably coupled to the bottom plate 24 about a first axis parallel to the saw blade axis 19. During the cutting process, the guiding surface 48 of the guiding member 46 abuts against the guiding surface 81, and the electric saw 10 is moved to complete the cutting.

Specifically, please refer to Figure 4. A through hole 50 is provided at both ends of the opening 28 along the longitudinal extension direction of the casing 20. The saw blade plane of the chainsaw 10 passes through the area defined by the through holes 50. A bracket 52 and a guide 46 are disposed on both sides of the through hole 50, respectively. In view of the structure of the through hole 50, the bracket 52, and the guide member 46 located at both ends of the opening 28, the specific structure will be described below by taking only the front end of the opening 28 as an example.

The bracket 52 is mounted on the bottom plate 24 by screws 51, and a through hole 53 is provided. The bolt 55 is fixedly connected to the bracket 52 through the through hole 53, and the free end thereof is provided with an external thread. The guide member 46 is correspondingly provided with a connecting portion 54 that cooperates with the external thread of the bolt 55. Here the axis of the bolt 55 is the first axis. The guide member 46 is rotatable relative to the bottom plate 24 by the engagement of the connecting portion 54 with the bolt 55. The guide member 46 also includes a guide portion 56 provided with a guide surface 48 that can cooperate with the guide surface 81 of the guide 80 to guide the cutting operation. In the present embodiment, the connecting portion 54 and the guide portion 56 are fixedly connected by a nut 57. It can be understood that the connecting portion 54 and the guiding portion 56 can also be integrally processed. “Integrally” is to be understood to mean at least a materially bonded connection. For example, through a welding process, a bonding process, or other processes that the skilled person deems meaningful.

The guide member 46 is also provided with an operating portion 58 for the convenience of the user's operation. The user can drive the guide member 46 to rotate about the first axis by operating the operating portion 58.

The guide member 46 rotates about the first axis, having a first position that does not extend beyond the bottom surface 26 of the bottom plate and a second position that at least partially extends beyond the bottom surface 26 of the bottom plate. The first position and the second position are confirmed such that the bracket 52 is provided with a stopper that restricts the rotational position of the guide 46, and the stopper includes a first stopper 61 and a second stopper 63. In the present embodiment, the first stopping portion 61 and the second stopping portion 63 are both flat surfaces, and the two are obtuse angles. The guide member 46 is rotated clockwise until the arcuate surface of the guide portion 56 abuts against the first stop portion 61 and cannot continue to rotate. At this time, the guide member 46 does not extend beyond the bottom surface 26 of the bottom plate, and is located at the first position. The guide member 46 is rotated in the opposite direction until the arcuate surface of the guide portion 56 abuts against the second stopper portion 63 and cannot be further rotated. At this time, the guide member 46 at least partially extends beyond the bottom surface 26 of the bottom plate in the second position. The bolt 55, the connecting portion 54, and the guide portion 56 are configured such that when the guide member 46 is in the second position, the guide surface 48 of the guide member 46 is coplanar with the plane of the saw blade. That is, during the actual cutting process, the guide surface 48 of the guide member 46 is coplanar with the first side cutting plane 27. Of course, the guiding surface 48 of the guide member 46 coplanar with the first side cutting plane 27 of the saw blade 22 is not limited to being absolutely coplanar in an absolute sense. It will be appreciated by those skilled in the art that the guide surface 48 of the guide member 46 and the first side cutting plane 27 of the saw blade 22 are parallel to each other due to the gap and tolerances of the mechanical structure being combined with each other and the guide surface 48 is The first side cutting plane 27 has a certain gap. Or to avoid damage to the guide 80 (Fig. 7) during cutting, a certain gap is reserved between the first side cutting plane 27 and the guide surface 48 and the guide surface 48 is placed closer to the transmission mechanism 17. That is, the first side cutting plane 27 and the guiding surface 48 are parallel to each other and have a certain distance from the guiding surface 48, and the distance value is between 0.1 and 1.5 mm. Within this range of distances are within the coplanar range of the present invention. More preferably, the distance value is between 0.5 and 0.9 mm.

Of course, there may be a large gap between the guide surface 48 of the guide member 46 and the first side cutting plane 27 of the saw blade 22 due to machining errors or mounting errors. Accordingly, the chainsaw 10 further includes adjustment means for adjusting the position of the guide member 46 relative to the bottom plate 24, and ultimately, in the second position, the guide surface 48 of the guide member 46 is coplanar with the first side cutting plane 27 of the saw blade. . For example, in this embodiment, the position of the bracket 52 relative to the bottom plate 24 can be varied by changing the position of the bracket 52 relative to the bottom plate 24, such as by the waist-shaped apertures 59 provided in the bracket 24, and ultimately the guide surface 48 It is coplanar with the first side cutting plane 27 of the saw blade 22.

The chainsaw 10 also includes a reset member 60 that holds the guide member 46 in the first position. In the present embodiment, the reset member 60 is a tension spring. One end of the tension spring is fixedly connected to the guiding member 46, and the other end of the tension spring is fixedly connected with the bracket 52, for example, a tension spring is sleeved on the screw 62 fixedly connected to the bracket 52. When it is desired to guide the cutting using the guide portion 46, the user needs to overcome the elastic force of the tension spring 60 to drive the guide member 46 to rotate, switching from the first position to the second position. Since the guide member 46 is switched from the first position to the second position, the connecting portion 54 and the bolt 55 are further fitted, and the threading force between the two is sufficient to overcome the elastic force of the tension spring, and the guide member 46 is held in the second position. position.

When the guide member 46 is in the second position, as shown in FIG. 5, the guide surface 48 of the guide portion 56 can directly abut against the guide surface 81 to guide the cutting operation, whereby the power saw 10 of the present invention is more convenient to use. Specifically, as shown in FIG. 6. The operator usually marks the cutting line on the workpiece W before cutting. The cutting line can be drawn by ink or laser indicating. The guiding device 80 has a guiding surface 81. When cutting is performed, the guiding surface 81 of the guiding device 80 is first aligned with the cutting line previously marked on the workpiece W; then the operating portion 58 is rotated such that the guiding portion 56 passes through the through hole 50 to move to the second position; The guiding surface 48 of the portion 56 abuts against the guiding surface 81 of the guiding device 80. Since the blade plane is coplanar with the guide surface 48, the blade plane is also immediately adjacent to the guide surface 81. Then, the trajectory of the rotary cutting of the saw blade 22 is the trajectory shown by the cutting line, and the electric saw 10 can be moved to complete the cutting.

FIG. 7 shows a schematic view of the positional relationship between the guide 80 and the chainsaw 10 in order to prevent the guide device 80 from being injured by the saw blade 22. In order to better show the positional relationship between the guide surface 48, the first side cutting plane 27 and the guide surface 81, a partial enlargement process is particularly performed at A. At this time, the guide surface 48 of the guide member 46 is disposed closer to the guide surface 81 with respect to the first side cutting plane 27 of the saw blade 22. When the operating portion 58 is not driven, the guide portion 56 is in the first position, as shown in FIG. 8, the user can directly align the saw blade 22 with the cutting line on the workpiece W for cutting. Of course, in order to improve the cutting accuracy, the user can also use a special guide ruler.

In a possible embodiment, the guides are also movably arranged on the side of the base plate parallel to the saw blade axis.

In a possible embodiment, the bottom surface of the bottom plate is provided with a groove. In the first position, the guide member is received in the recess; in the second position, the guide member at least partially protrudes from the recess.

9 to 10 show a power saw 100 of a second embodiment of the present invention.

Two guiding members 170 are fixed on the bottom plate 150, and the guiding members 170 extend downward to the lower end of the bottom plate 150. In this embodiment, the guiding member 170 has a rectangular parallelepiped shape, and the guiding member 170 has a guiding surface 171 that is coplanar with the saw blade 130.

Specifically, the body 110 is provided with a handle 111. The side of the saw blade 130 near the handle 111 is a first side cutting plane 131, the side away from the handle 111 is a second side cutting plane 133, and the guiding surface 171 of the guide 170 is coplanar with the first side cutting plane 131.

When the user uses, the existing wooden strip can be selected, and the guiding surface 171 of the guiding member 170 is pressed against the side of the wooden strip and slides along the wooden strip to achieve the guiding effect.

Further, the number of the guide members 170 is not limited to two, one or more.

In this embodiment, the guiding member 170 has a rectangular parallelepiped shape. Of course, the guide member 170 can also have other regular or irregular shapes.

In this embodiment, the guiding member 170 is integrally formed with the bottom plate 150. Similarly, the guide member 170 can also be detachably coupled to the bottom plate 150, such as a threaded connection, a snap connection, a pin connection, or the like.

A power saw 200 of a third embodiment of the present invention is shown in Figs. Unlike the chainsaw 100, the guide member 270 is movably coupled to the base plate 250.

Specifically, the upper end of the bottom plate 250 is provided with a rotating shaft 251, and the guiding member 270 is provided with a rotating hole 273 matched with the rotating shaft 251, and the guiding member 270 is rotatably sleeved on the rotating shaft 251. Similarly, a socket may be provided on the bottom plate 250, and a rotating shaft is disposed on the guiding member 270, and the rotating shaft is inserted into the insertion hole, thereby realizing the rotation of the guiding member 270. The guide member 270 is rotated relative to the bottom plate 250 with a first position that does not extend beyond the bottom surface of the bottom plate and a second position that at least partially extends beyond the bottom surface of the bottom plate.

Preferably, the axial direction of the rotating shaft 251 is parallel to the axial direction of the rotating shaft of the saw blade 130, so that the guiding surface of the guiding member 270 can be better ensured to be coplanar with the first side cutting plane without loosening the connection or the like. Resulting that the guiding surface deviates from the first side cutting plane.

The bottom plate 250 is provided with a through hole 253 through which the guide member 270 can pass. In the second position, the guide member 270 extends downward through the through hole 253 to the lower end of the bottom plate 250, thereby achieving a guiding function; in the first position, the guiding member 270 is hidden in the bottom plate 250. The guiding member 270 is provided with a first positioning groove 275 and a second positioning groove 277. The bottom plate 250 is provided with a first positioning member 255 elastically connected to the bottom plate 250. The first positioning member 255 has a first positioning groove 275 and a second portion. The positioning groove 277 matches the first positioning portion 2551.

In this embodiment, the first positioning member 255 and the bottom plate 250 are connected by a spring 258. Specifically, the first positioning member 255 is provided with a first receiving cavity 2553, and the bottom plate 250 is provided with a second receiving cavity 257. One end of the spring 258 is inserted into the first receiving cavity 2553, and the other end is inserted into the second receiving cavity 257, and They are pressed against the bottom walls of the first receiving cavity 2553 and the second receiving cavity 257, respectively.

When the first positioning portion 2551 is inserted into the first positioning groove 275, the guide 270 is hidden in the bottom plate 250 as shown in FIGS. 18 and 19. When the guiding member 270 is required to work, the guiding member 270 is swung to rotate around the rotating shaft 251, and the first positioning portion 2551 is displaced; the first positioning portion 2551 compresses the spring 258 to compress it, so that the first positioning portion 2551 is drawn. The first positioning member 255 is elastically biased by the spring 258 when the second positioning groove 277 is wound to the first positioning member 255. The action is ejected so that the first positioning portion 2551 is inserted into the second positioning groove 277 to fix the guide 270.

On the contrary, when the guiding member 270 is not working, the reverse rotation is performed, so that the first positioning portion 2551 is inserted into the first positioning groove 275 again, so that the guiding member 270 is hidden in the bottom plate 250.

The electric saw 200 can hide the guiding member 270 when the guiding member 270 is not applicable, and is convenient to operate and convenient for storage.

In this embodiment, the first positioning portion 2551 is tapered, and the first positioning groove 275 and the second positioning groove 277 are tapered grooves.

Preferably, the first positioning groove 275 and the second positioning groove 277 are perpendicular to the axial direction.

In one of the embodiments, the bottom plate 250 is further provided with a shield 259 for covering the guide member 270 and its positioning structure.

20 and 21 show a power saw 300 according to a fourth embodiment of the present invention. Unlike the chainsaw 200, the guides 370 are positioned differently.

Specifically, the bottom plate 350 is provided with a third positioning slot 3561 and a fourth positioning slot 3563. The guiding member 370 is provided with a second positioning member 378 elastically connected to the guiding member 370. The second positioning member 378 has a third positioning slot. The third positioning portion 3782 is matched with the fourth positioning groove 3563.

When the second positioning portion 3782 is inserted into the third positioning groove 3561, the guiding member 370 is hidden in the bottom plate 350 in the first position; when the second positioning portion 3782 is inserted into the fourth positioning groove 3563, the guiding member 370 extends downward to the bottom plate. At the lower end of the 350, in the second position, the cutting can be guided.

It should be noted that the guiding member 370 can also be movably connected to the bottom plate 350 by other means to keep it in a hidden or working state.

The electric saw provided by the invention is movably connected with a guiding member, and the guiding member has a guiding surface. The guide member, when movable relative to the base plate, has a first position that does not extend beyond the bottom surface of the bottom plate and a second position that at least partially extends beyond the bottom surface of the bottom plate. In the second position, the guiding surface of the guide is coplanar with the plane of the saw blade. When the user uses, the existing wooden strip can be selected, and the guiding surface of the guiding member is pressed against the side of the wooden strip, which can achieve the guiding function without purchasing a special guide rail; at the same time, the cost is low and the storage is convenient.

The electric saw provided by the invention has the guide member not exceeding the bottom surface of the bottom plate in the first position, and is convenient to operate and convenient for storage.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

An electric saw for cutting in cooperation with a guiding device, the guiding device having a guiding surface, the electric saw comprising:

case;

a motor housed in the housing;

a transmission mechanism connected to the motor for driving the saw blade to rotate;

The saw blade is supported by a saw blade shaft and has a saw blade plane;

a bottom plate connected to the housing for supporting the housing, the bottom plate having a bottom surface and an opening through which the saw blade passes;

The bottom plate further includes a first side and a second side perpendicular to the saw blade axis, defining a first plane passing the first side and perpendicular to the bottom surface; passing the second side And perpendicular to the bottom surface is a second plane;

The electric saw further comprises a guiding member, the guiding member is located in a space defined by the first plane and the second plane, the guiding member comprises a guiding surface; the guiding member is movablely The bottom plate is connected to have a first position not exceeding the bottom surface of the bottom plate and a second position at least partially beyond the bottom surface of the bottom plate; in the second position, the guiding surface of the guiding member is common to the saw blade plane a face for mating with the guiding surface.
The electric saw according to claim 1, wherein an end surface of the saw blade adjacent to the transmission mechanism is defined as a first side cutting plane, and an end surface of the saw blade away from the transmission mechanism is a second side cutting plane. The second guiding position is coplanar with the first side cutting plane.
The electric saw according to claim 1, wherein two of the guide members are connected to the bottom plate, and the two guide members are arranged on the saw blade in a direction perpendicular to the saw blade axis. Both ends.
The electric saw according to claim 1, wherein said electric saw further comprises adjustment means for adjusting a position of said guide relative to said bottom plate and said guiding in said second position The face is coplanar with the plane of the saw blade.
The electric saw according to claim 1, wherein the bottom plate is provided with a through hole, and the guide member passes through the through hole and the guiding surface when the guiding member moves relative to the bottom plate. Cooperate.
The electric saw according to claim 1, wherein the guide member is slidably coupled to the bottom plate.
The electric saw according to claim 1, wherein said guide member is rotatably coupled to said bottom plate about a first axis parallel to said blade shaft.
The electric saw according to claim 7, wherein the guide member comprises a fixed connection guide portion and a connecting portion; the guide surface is disposed on the guide portion; the connecting portion is provided with a threaded hole, a bolt corresponding to the threaded hole of the connecting portion is disposed on the bottom plate, and the axis of the bolt is the first axis;

The guide moves between the first position and the second position as the connecting portion rotates about the first axis.
The electric saw of claim 8 wherein said electric saw further comprises a reset member for retaining said guide member in said first position.
The electric saw according to claim 9, wherein the returning member is a tension spring, one end of the tension spring is fixedly connected to the bottom plate, and the other end of the tension spring is fixedly connected to the guiding member.
The electric saw according to claim 7, wherein the upper end of the bottom plate is provided with a rotating shaft, the axis of the rotating shaft is the first axis; and the guiding member has a rotating hole matched with the rotating shaft. The guide member is rotatably sleeved on the rotating shaft;

a first positioning groove and a second positioning groove are disposed on the guiding member, and the bottom plate is provided with a first positioning member elastically connected to the bottom plate, the first positioning member has a first positioning groove and a first positioning portion matched by the second positioning groove;

When the first positioning portion is inserted into the first positioning slot, the guiding member is hidden in the bottom plate and located in the first position; when the first positioning portion is inserted into the second positioning slot, the The guide member passes through the through hole beyond the bottom surface of the bottom plate and is located at the second position.
The electric saw according to claim 11, wherein the first positioning portion has a tapered shape, and the first positioning groove and the second positioning groove have a tapered groove.
The electric saw according to claim 12, wherein the axes of the first positioning groove and the second positioning groove are perpendicular.
The electric saw according to claim 11, wherein the first positioning member is coupled to the bottom plate by a spring.
The electric saw according to claim 7, wherein the upper end of the bottom plate is provided with a rotating shaft, the guiding member has a rotating hole matched with the rotating shaft, and the guiding member is rotatably sleeved on the rotating shaft on;

a third positioning slot and a fourth positioning slot are disposed on the bottom plate, and the guiding member is provided with a second positioning member elastically connected to the guiding member, and the second positioning member has a third positioning slot a second positioning portion matching the fourth positioning groove;

When the second positioning portion is inserted into the third positioning slot, the guiding member is hidden in the bottom plate and located in the first position; when the second positioning portion is inserted into the fourth positioning slot, the A guide member extends downward through the through hole to a lower end of the bottom plate in the second position.
The electric saw according to claim 1, wherein the bottom surface of the bottom plate is provided with a groove, and in the first position, the guiding member is received in the groove; in the second position, the The guide member at least partially protrudes from the recess.
The electric saw according to claim 1, wherein said guide member is movably disposed on a side of said bottom plate parallel to said blade shaft.