WO2019114777A1 - 电圆锯 - Google Patents

电圆锯 Download PDF

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Publication number
WO2019114777A1
WO2019114777A1 PCT/CN2018/120769 CN2018120769W WO2019114777A1 WO 2019114777 A1 WO2019114777 A1 WO 2019114777A1 CN 2018120769 W CN2018120769 W CN 2018120769W WO 2019114777 A1 WO2019114777 A1 WO 2019114777A1
Authority
WO
WIPO (PCT)
Prior art keywords
circular saw
electric circular
motor
plane
disposed
Prior art date
Application number
PCT/CN2018/120769
Other languages
English (en)
French (fr)
Inventor
吹拔正敏
王洪斌
Original Assignee
南京德朔实业有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京德朔实业有限公司 filed Critical 南京德朔实业有限公司
Publication of WO2019114777A1 publication Critical patent/WO2019114777A1/zh

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • B23D45/16Hand-held sawing devices with circular saw blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/04Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • B23D47/12Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of drives for circular saw blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00Accessories specially designed for sawing machines or sawing devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D59/00Accessories specially designed for sawing machines or sawing devices
    • B23D59/02Devices for lubricating or cooling circular saw blades
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/08Protective coverings for parts of machine tools; Splash guards

Definitions

  • the present disclosure relates to a power tool, and in particular to an electric circular saw.
  • the electric circular saw usually comprises a casing, a saw blade, a shroud, a bottom plate, a motor and a power supply device, wherein in the existing electric circular saw, the motor is usually arranged on one side of the saw blade, which causes the entire electric circular saw.
  • the center of gravity is located on one side of the saw blade, and the distance between the center of gravity and the plane of symmetry of the handle portion is relatively large, so that the balance performance of the electric circular saw is difficult to improve.
  • an object of the present disclosure is to provide an electric circular saw with good balance performance.
  • an electric circular saw comprising: an output shaft for mounting a saw blade; a motor for driving the output shaft to rotate; and a housing including a symmetric arrangement about the first plane a handle; wherein the housing further comprises: a first receiving portion formed with a first receiving cavity for accommodating the motor, the first receiving portion comprising a first portion disposed on a left side of the first plane and a right portion disposed in the first plane a second portion of the side; a joint portion for coupling a power supply device capable of supplying power to the electric circular saw; the handle having first and second ends respectively at opposite ends thereof, the first receiving portion being coupled to the handle At the first end, the joint is coupled to the second end of the handle.
  • the bonding portion is connected with a power input terminal for connecting to the power output terminal on the battery pack.
  • the output shaft is rotatable about a first axis when driven by the motor
  • the motor includes a motor shaft rotatable about the second axis, the first axis of rotation of the output shaft and the second axis of rotation of the motor being parallel to each other.
  • the distance between the first axis and the second axis is greater than or equal to 50 mm and less than or equal to 120 mm.
  • the saw blade when the output shaft is mounted with the saw blade, the saw blade extends in a cutting plane, the cutting plane is perpendicular to the first axis; the motors are distributed on both sides of the cutting plane.
  • the electric circular saw further includes: a transmission device for realizing transmission of power between the motor and the output shaft; the housing further comprising: a second receiving portion formed with a second receiving cavity for receiving the transmission; the handle is The first accommodating portion and the upper side of the joint portion connect both of them; the second accommodating portion connects both of them at the lower side of the first accommodating portion and the joint portion.
  • the electric circular saw further includes: a circuit board disposed in the second receiving portion; a fan disposed in the housing; wherein the housing is further formed with an airflow inlet and an airflow outlet; and the fan can be formed in the housing when the fan rotates
  • the airflow inlet flows into the housing and then flows out of the airflow from the airflow outlet; the circuit board, the transmission, and the motor are all disposed in a flow path of the heat dissipation airflow.
  • the heat dissipation airflow sequentially flows through the circuit board, the transmission, and the motor.
  • the electric circular saw further includes: a transmission device for realizing transmission of power between the motor and the output shaft; the housing further comprising: a second receiving portion formed with a second receiving cavity for receiving the transmission; a handle, The first accommodating portion, the second accommodating portion, and the joint portion are sequentially connected and surrounded with a through hole formed by a user's hand to grip the handle.
  • a power cord is fixedly connected to the joint portion, and a plug is disposed at one end of the power cord away from the joint portion.
  • the housing further includes: a shroud assembly including a fixed shroud and a movable shroud rotatable relative to the fixed shroud; the first receiving portion is disposed on an upper side of the shroud assembly.
  • the distance between the center of gravity of the electric circular saw and the first plane is greater than or equal to 0 and less than or equal to 20 mm.
  • the joint is symmetrically disposed about the first plane.
  • the output shaft is rotatable about the first axis when driven by the motor, and the joint portion and the first receiving portion are respectively disposed on two sides of a second plane passing through the first axis and perpendicular to the first plane.
  • the housing further includes: a shroud assembly including a fixed shroud and a movable shroud rotatable relative to the fixed shroud; a forward opening between the movable shroud and the fixed shroud to contact the saw blade to the workpiece
  • the notch, the first receiving portion is disposed at the front end of the handle, and the joint portion is disposed at the rear end of the handle.
  • the electric circular saw further includes: a bottom plate formed with a bottom plate plane for contacting the workpiece; the bottom plate further formed with an opening at least partially for the saw blade; the saw blade passes through the bottom plate when the electric circular saw has the maximum cutting depth
  • the effective cutting portion has the largest size; wherein, when the electric circular saw has the maximum cutting depth, the orthographic projections of the motor, the handle and the battery pack in the plane in which the bottom plate plane lies are arranged in a line.
  • the saw blade when the saw blade is mounted on the output shaft, the saw blade extends in a cutting plane, and the orthographic projection of the motor in the cutting plane is outside the orthographic projection of the saw blade in the cutting plane.
  • the saw blade is a circular saw blade
  • the output shaft can be rotated about the first axis
  • the motor includes a motor shaft that can rotate on the second axis, and the second axis of the motor shaft rotates and the output shaft rotates first.
  • the axes are parallel to one another; wherein the distance between the first axis and the second axis is greater than the radius of the circular saw blade.
  • the electric circular saw further includes: a fan connected to the motor; and the fan disposed in the first receiving cavity.
  • the saw blade when the output shaft is mounted with the saw blade, the saw blade extends in a cutting plane, and the orthographic projections of the motor, the handle portion and the joint in the cutting plane are outside the orthographic projection of the saw blade in the cutting plane.
  • the present disclosure is advantageous in that, by arranging the structure of the electric circular saw reasonably, especially optimizing the spatial arrangement of the structure of the motor, the casing, the handle, etc., the center of gravity of the electric circular saw is close to the symmetry plane of the handle portion, so that the electric circle The balance of the saw is good.
  • FIG. 1 is a perspective view of an electric circular saw of a first embodiment of the present disclosure
  • Figure 2 is a perspective view of another angle of the electric circular saw of Figure 1;
  • Figure 3 is a front elevational view of the electric circular saw of Figure 1;
  • Figure 4 is a rear elevational view of the electric circular saw of Figure 1;
  • Figure 5 is a plan view of the electric circular saw of Figure 1;
  • Figure 6 is a cross-sectional view of the electric circular saw of Figure 5 taken along line A-A;
  • Figure 7 is a cross-sectional view of the electric circular saw of Figure 5 taken along line B-B;
  • Figure 8 is a front elevational view of the electric circular saw of Figure 3 after the battery pack is removed;
  • Figure 9 is a rear elevational view of the electric circular saw of Figure 4 after removal of the rear housing portion;
  • Figure 10 is a perspective view of the structure shown in Figure 9;
  • Figure 11 is a perspective view of another angle of the structure shown in Figure 9;
  • Figure 12 is a perspective view of the structure shown in Figure 11 after removing the heat sink;
  • Figure 13 is an exploded view of the electric circular saw of Figure 1;
  • Figure 14 is a perspective view of another angle of the structure shown in Figure 13;
  • Figure 15 is a rear elevational view of the electric circular saw of the second embodiment after removing the rear housing portion
  • Figure 16 is a perspective view of the electric circular saw of the third embodiment after removing the rear casing portion
  • Figure 17 is a rear elevational view of the electric circular saw of the fourth embodiment after removing the rear casing portion
  • Figure 18 is a front elevational view of the electric circular saw of the fifth embodiment
  • Figure 19 is a front elevational view of the electric circular saw of the sixth embodiment.
  • Figure 20 is a front elevational view of the electric circular saw of the seventh embodiment
  • Figure 21 is a front elevational view of the electric circular saw of the eighth embodiment.
  • the electric circular saw 100 of the first embodiment shown in Fig. 1 can be used for cutting wood, fiberboard, plastic, and the like.
  • the electric circular saw 100 includes a housing 11, an output shaft 121, a saw blade 122, a bottom plate 13, a motor 14, and a power supply unit 15.
  • the housing 11 is for accommodating parts such as the motor 14, and the motor 14 is used to provide a power source, and can drive the output shaft 121 to rotate with the first axis 101 as an axis to output power.
  • the saw blade 122 is used to cut the workpiece, and the bottom plate 13 is formed with a bottom plate plane 131 for contacting the workpiece.
  • the power supply unit 15 is used to supply power to the motor 14.
  • the power supply unit 15 may be a battery pack 151 or an AC power line.
  • the upper side, the lower side, the front side, the rear side, the left side, and the right side as shown in FIG. 1 are also defined.
  • the housing 11 includes a handle 111, a first housing portion 112, a joint portion 113, and a second housing portion 114.
  • the handle 111 is used for the user to hold, and the handle 111 is also symmetrically disposed about the first plane 102, the first plane 102 being perpendicular to the first axis 101 of the output shaft 121.
  • the handle 111 has a first end 111a and a second end 111b at both ends in the extending direction thereof.
  • the handle 111 is further provided with a trigger switch 111c and a safety switch 111d.
  • the trigger switch 111c and the handle 111 form a movable connection.
  • the user's hand holding the handle 111 can trigger the trigger switch 111c to start the electric circle.
  • the saw 100, the safety switch 111d is disposed on the handle 111 or near the handle 111, and the safety switch 111d is used to lock the trigger switch 111c in a position that is not triggered by the user, thereby preventing the accidental activation of the electric circular saw 100 and protecting the user from injury. .
  • the first receiving portion 112 is disposed at a first end 111a in the extending direction of the handle 111, and the first receiving portion 112 includes a first portion disposed on a left side of the first plane 102 and a second portion disposed on a right side of the first plane 102 unit.
  • the first housing portion 112 is also formed with a first housing chamber 112a, and the motor 14 is disposed within the first housing chamber 112a.
  • the shape of the outer surface of the first receiving portion 112 can be designed to be suitable for the structure that the user holds, that is, the first receiving portion 112 can also serve as a sub-handle for the user to hold, so that when the user operates the electric circle
  • the first receiving portion 112 can also serve as a sub-handle for the user to hold, so that when the user operates the electric circle
  • the electric motor 14 can be held by the user, so that the electric circular saw 100 does not need to separately provide a sub-handle for the user to hold, thereby greatly saving the manufacturing cost and reducing the electric circular saw 100.
  • the volume reduces the weight of the electric circular saw 100.
  • the first receiving portions 112 are distributed on both sides of the first plane 102, thereby facilitating the center of gravity of the entire circular saw 100 to be disposed closer to the first plane 102 in a direction perpendicular to the first plane 102.
  • the distance between the center of gravity of the electric circular saw 100 and the first plane 102 is greater than or equal to 0 and less than or equal to 10 mm.
  • the distance between the center of gravity of the electric circular saw 100 and the first plane 102 is greater than or equal to 0 and less than or equal to 5mm.
  • the joint portion 113 is disposed at the second end 111b in the extending direction of the handle 111, that is, the joint portion 113 and the first accommodating portion 112 are respectively disposed at both ends in the extending direction of the handle 111.
  • the joint portion 113 is for coupling with the power supply device 15 that supplies power to the electric circular saw 100.
  • the power supply device 15 is specifically a battery pack 151.
  • the joint portion 113 is for detachably bonding the battery pack 151, and the battery pack 151 can supply power to the motor 14 when mounted to the joint portion 113.
  • the joint portion 113 is connected to a power input terminal (not shown) for connecting to the power output terminal on the battery pack 151.
  • the joint portion 113 is also symmetrically disposed with respect to the first plane 102 described above, and the battery pack 151 mounted to the joint portion 113 is also symmetrically disposed with respect to the first plane 102, thereby further facilitating the entire electric circular saw.
  • the center of gravity of 100 is disposed adjacent to the first plane 102, thereby facilitating a more stable operation of the electric circular saw 100 by the user.
  • the first accommodating portion 112, the handle 111 and the joint portion 113 are sequentially arranged in a direction perpendicular to the first straight line 103 of the first axis 101, and the handle 111 is located between the first accommodating portion 112 and the joint portion 113, or first The accommodating portion 112 and the joint portion 113 are located on both sides of the handle 111, thereby facilitating the center of gravity of the entire electric circular saw 100 to be disposed close to the handle 111 in a direction perpendicular to the first axis 101 and parallel to the first plane 102, thereby improving The balance performance of the electric circular saw 100.
  • the first accommodating portion 112, the handle 111, and the joint portion 113 are sequentially arranged in the direction of the first straight line 103, and it is not strictly limited that any one of them extends in the direction of the first straight line 103 as long as they are entirely
  • the upper portion appears to be substantially in a straight line, that is, the first housing portion 112, the handle 111, and the joint portion 113 can be considered to be sequentially arranged in the direction of the first straight line 103.
  • the output shaft 121 is rotatable about the first axis 101 when driven by the motor 14, and the coupling portion 113 and the first receiving portion 112 are respectively disposed on a first axis 101 and perpendicular to the first plane 102.
  • the first receiving portion 112 is disposed on the left side of the handle 111, that is, the first receiving portion 112 is disposed on one side of the forward direction of the electric circular saw 100
  • the joint portion 113 is disposed on the right side of the handle 111, that is, That is to say, the joint portion 113 is provided on the side of the electric circular saw 100 close to the user.
  • the second housing portion 114 is disposed on the rear side of the saw blade 122, and the second housing portion 114 is formed with a second housing chamber 114a.
  • the handle 111 connects the first accommodating portion 112 and the joint portion 113 in one direction, and the second accommodating portion 114 connects the first accommodating portion 112 and the joint portion 113 in the other direction.
  • the second housing portion 114 is also disposed on the lower side of the handle 111. Further, the handle 111 connects both of the first accommodating portion 112 and the upper side of the joint portion 113, and the second accommodating portion 114 connects both of the first accommodating portion 112 and the lower side of the joint portion 113.
  • the housing 11 can also be split into a front housing portion 115, a rear housing portion 116, and an intermediate housing portion 117, wherein the front housing portion 115 is disposed in the intermediate housing.
  • the rear housing portion 116 is disposed on the rear side of the intermediate housing portion 117, and the three of them abut each other to form the entire housing 11.
  • the handle 111 may be abutted by the front housing portion 115 and the intermediate housing portion 117.
  • the joint portion 113 may also be formed by the front housing portion 115 and the intermediate housing portion 117.
  • the first receiving portion 112 may be front.
  • the housing portion 115, the intermediate housing portion 117, and the rear housing portion 116 are butted together, and the second housing portion 114 may be butted by the intermediate housing portion 117 and the rear housing portion 116.
  • the front case portion 115, the rear case portion 116, and the intermediate case portion 117 are fixed to each other by screws.
  • the output shaft 121 is used to mount the saw blade 122, and the output shaft 121 drives the saw blade 122 to cut the workpiece when the housing 11 is rotated about the first axis 101.
  • the output shaft 121 extends in the direction of the first axis 101.
  • the saw blade 122 is a circular saw blade centered on the first axis 101.
  • the saw blade 122 extends in a cutting plane, and the cutting surface produced by the saw blade 122 when the workpiece is cut is also extended in the cutting plane.
  • the cutting plane is perpendicular to the first axis 101, and the cutting plane is parallel to the first plane 102.
  • the bottom plate 13 is also formed with an opening 132 through which the saw blade 122 at least partially passes so that the saw blade 122 can protrude to the underside of the bottom plate plane 131.
  • the size of the effective cutting portion of the saw blade through the bottom plate 13 is the largest.
  • the orthographic projections of the motor 14, the handle 111 and the battery pack 151 in the plane of the bottom plate plane 131 are sequentially arranged in a straight line.
  • orthographic projection of the motor 14, the handle 111 and the battery pack 151 in the plane of the bottom plate plane 131 means that the projection lines of the motor 14, the handle 111 and the battery pack 151 are perpendicular to the plane of the bottom plate plane 131.
  • An orthographic projection in the present disclosure refers to a projection of an object on a projection surface under a projection line perpendicular to the projection surface.
  • the orthographic projection of the motor 14 in the cutting plane is located outside the orthographic projection of the saw blade 122 in the cutting plane, and the orthographic projection of the handle 111 in the cutting plane is located at the saw blade 122.
  • the orthographic projection of the battery pack 151 in the cutting plane is also outside the orthographic projection of the saw blade 122 in the cutting plane.
  • the first plane 102 and the cutting plane coincide with each other to be the same plane.
  • the motor 14 may be a brushless motor 14, and the motor 14 includes a motor shaft 141 that is rotatable about a second axis 104.
  • the direction of the second axis 104 in which the motor shaft 141 rotates is also rotated with the output shaft 121.
  • the first axes 101 are oriented parallel to each other.
  • the motor 14 is distributed on both sides of the first plane 102 and the motor 14 is also distributed on both sides of the cutting plane, that is, the first plane 102 and the cutting plane pass through the motor 14, avoiding the setting of the motor 14.
  • the user caused by the first plane 102 or one side of the cutting plane cannot smoothly operate the electric circular saw 100.
  • the diameter of the motor 14 is between 45 mm and 65 mm, and the ratio of the rated power of the electric circular saw 100 to the diameter of the motor 14 is 25 W/mm or more and 35 W/mm or less, and further, the ratio is 30 W/mm.
  • the battery pack 151 can be inserted into the joint portion 113 in the direction of the second straight line 105, and the direction of the second straight line 105 is perpendicular to the direction of the first axis 101 in which the output shaft 121 rotates.
  • the direction in which the battery pack 151 is inserted into the second straight line 105 of the joint portion 113 is obliquely intersected with the bottom plate plane 131. .
  • the battery pack 151 When the battery pack 151 is inserted into the joint portion 113, the battery pack 151 is distributed on both sides of the first plane 102 and the battery pack 151 is also distributed on both sides of the cutting plane, that is, the first plane 102 and the cutting plane are both Through the battery pack 151, the problem that the user cannot smoothly operate the electric circular saw 100 caused by the battery pack 151 being disposed on the first plane 102 or one side of the cutting plane is avoided. Furthermore, the battery pack 151 is also symmetrically disposed with respect to the first plane 102, thereby facilitating the improvement of the balance performance of the electric circular saw 100.
  • the first housing portion 112 and the coupling portion 113 are respectively disposed on both sides of the second plane 107, so that when the battery pack 151 is inserted into the joint portion 113, the motor 14 and the battery pack 151 are respectively disposed.
  • the first receiving portion 112, the handle 111 and the joint portion 113 are sequentially arranged in a direction perpendicular to the first straight line 103 of the first axis 101, such that when the battery pack 151 is inserted into the joint portion 113, the motor 14, the handle 111
  • the battery pack 151 is also arranged substantially in the order of the first straight line 103. It will be appreciated that in other embodiments, the motor 14, handle 111 and battery pack 151 may also be sequentially arranged in a circumferential direction about the saw blade 122 and centered on the first axis 101.
  • the joint portion 113 is distributed on both sides of the first plane 102 and the joint portion 113 is also distributed on both sides of the cutting plane, that is, the first plane 102 and the cutting plane pass through the joint portion 113, thereby avoiding The problem that the joint portion 113 is disposed on one side of the first plane 102 or the cutting plane cannot smoothly operate the electric circular saw 100.
  • the housing 11 also includes a shroud assembly 16.
  • the shroud assembly 16 includes a fixed shroud 161 and a movable shroud 161 that are fixed relative to the housing 11, and the movable shroud 161 is rotatable relative to the housing 11 about a first axis 101.
  • the fixed cover 161 is fixedly coupled to the housing 11, and the fixed cover 161 is also disposed on the upper side of the floor plane 131.
  • the movable shroud 161 and the housing 11 constitute a rotational connection with the first axis 101 as an axis, and the movable shroud 161 at least partially protrudes to the lower side of the bottom plate plane 131.
  • a gap 163 is formed between the movable cover 161 and the fixed cover 161 to expose the saw blade 122.
  • the motor 14 is also located on the upper side of the saw blade 122, and further, the motor 14 is also located on the upper side of the fixed shield 161.
  • the notch 163 and the motor 14 are disposed on the same side of the second plane 107, and the battery pack 151 is located on the other side of the plane.
  • the distance between the second axis 104 of rotation of the motor 14 and the first axis 101 of the rotation of the output shaft 121 is greater than the radius of the circular saw blade 122, and further, the distance between the second axis 104 and the first axis 101 is greater than Equal to 50 mm and less than or equal to 120 mm, which makes the distance between the motor 14 and the output shaft 121 large, so that it is necessary to provide a transmission 17 for realizing transmission of power between the motor shaft 141 and the output shaft 121.
  • the transmission 17 includes a belt drive assembly 171 and a gear train 172. It will be understood that in other embodiments, the transmission 17 may also include only the belt drive assembly 171 or only the gear drive. Group 172 pieces.
  • the belt drive assembly 171 is disposed in the second accommodating cavity 114a formed by the second accommodating portion 114.
  • the belt drive assembly 171 specifically includes: a first pulley 171a, a second pulley 171b, and a transmission belt. 171c and intermediate shaft 171d.
  • the first pulley 171a is fixedly coupled to the motor shaft 141
  • the second pulley 171b is fixedly coupled to the intermediate shaft 171d
  • the transmission belt 171c is tensioned on the first pulley 171a and the second pulley 171b, thereby realizing power transmission.
  • the intermediate shaft 171d extends in a direction parallel to the third axis 106 of the first axis 101.
  • the driving belt 171c drives the second pulley 171b to rotate
  • the second pulley 171b drives the intermediate shaft 171d together with the third axis.
  • 106 is the axis rotation.
  • the gear transmission group 172 includes: a first gear 172a fixedly coupled to the intermediate shaft 171d and a second gear 172b coupled to the output shaft 121, the first gear 172a capable of transmitting power output from the intermediate shaft 171d to the output shaft 121, thereby driving The output shaft 121 rotates about the first axis 101.
  • the first gear 172a and the second gear 172b are in mesh with each other. It can be understood that in other embodiments, the user can also provide power between the first gear 172a and the second gear 172b. Passing gears.
  • the power tool further includes a locking member 123 that locks the rotation of the output shaft 121, and the locking member 123 cooperates with any one of the rotating members to lock the rotation of the member.
  • the rotational locking, or the locking member 123 can also cooperate directly with the motor shaft 141 or the output shaft 121 such that the rotation of the output shaft 121 is locked.
  • the second pulley 171b is formed with a locking groove 171e which is recessed inward in the radial direction perpendicular to the third axis 106.
  • the locking member 123 is partially disposed in the second receiving cavity 114a formed by the second receiving portion 114, and the locking member 123 is formed with a locking projection 123a that can be fitted into the locking groove 171e, and the locking member 123 can be rotated relative to the housing 11.
  • the locking projection 123a is fitted into the locking groove 171e to lock the rotation of the second pulley 171b, and the rotation of the output shaft 121 is locked.
  • the circuit board assembly 18 includes a first circuit board 181 and a second circuit board 182, and the control circuit of the electric circular saw 100 may be partially disposed on the first circuit board 181. And partially disposed on the second circuit board 182, so that the size of the first circuit board 181 and the second circuit board 182 are relatively small, so that all the control circuits are disposed on one circuit board to cause a large circuit board size.
  • the resulting problem of inconvenient setting of the circuit board can facilitate the placement of the first circuit board 181 and the second circuit board 182 in the proper position within the housing 11.
  • the first circuit board 181 is used to control the output power of the motor 14, and the second circuit board 182 can be used to control the battery pack 151, which is of course not limited thereto.
  • the first circuit board 181 is disposed in the second receiving cavity 114a formed by the second receiving portion 114, and the first circuit board 181 extends along a plane perpendicular to the first axis 101. Further, the transmission assembly and the motor 14 are disposed on the same side of the first circuit board 181, and more specifically, the second pulley 171b is disposed between the first circuit board 181 and the first pulley 171a.
  • the second circuit board 182 is disposed at the joint portion 113 of one end of the handle 111, and the second circuit board 182 extends in a plane parallel to the direction of the second straight line 105 and parallel to the direction of the first axis 101.
  • the first circuit board 181 and the second circuit board 182 can be made to efficiently utilize the internal space of the casing 11, so that the size of the casing 11 can be reduced.
  • the circuit board when the control circuits are all disposed on one circuit board, the circuit board may be disposed at the joint portion 113 or may be disposed in the second housing chamber 114a.
  • the heat dissipating component 19 includes a fan 191 and a heat dissipating plate 192.
  • the fan 191 rotates, a heat dissipating airflow for dissipating heat to the motor 14 can be generated, and the heat radiating plate 192 is formed with a flow direction for guiding the heat dissipating airflow. Cooling rib 192a.
  • the fan 191 is disposed in the first housing chamber 112a formed by the first housing portion 112, and the fan 191 is fixedly mounted to the motor shaft 141 to rotate synchronously with the motor shaft 141.
  • the fan 191 may be a centrifugal fan 191.
  • the first accommodating portion 112 is distributed on both sides of the first plane 102, and a portion of the first accommodating portion 112 on the front side of the first plane 102 may be defined as a front portion 112b, and the first accommodating portion 112 is located at a rear side of the first plane 102.
  • a portion may be defined as a rear portion 112c, and a fan 191 is disposed in a space surrounded by the front portion 112b.
  • the heat dissipation plate 192 is disposed in the second receiving cavity 114a formed by the second receiving portion 114.
  • the heat dissipation plate 192 can be fixedly coupled to the first circuit board 181. More specifically, the heat sink 192 extends in a plane perpendicular to the first axis 101, and the heat sink 192 is located on the rear side of the saw blade 122.
  • a first airflow inlet 114b and a first airflow outlet 112d are formed on the casing 11, and the first airflow inlet 114b is formed.
  • the first airflow outlet 112d also communicates with the inside and the outside of the casing 11, so that when the fan 191 rotates, it can flow from the first airflow inlet 114b into the interior of the casing 11, and then flows out through the first airflow outlet 112d.
  • the position of the first airflow inlet 114b and the first airflow outlet 112d on the housing 11 enables the heat dissipation airflow to flow through at least the heat dissipation plate 192, the transmission 17 and the motor 14, thereby enabling the first circuit board 181
  • the transmission 17 and the motor 14 dissipate heat.
  • the first airflow inlet 114b is disposed on the second receiving portion 114.
  • the position of the first airflow inlet 114b on the second receiving portion 114 corresponds to the position of the first circuit board 181, such that The heat-dissipating airflow flowing into the casing 11 from the first airflow inlet 114b can first flow into the first circuit board 181.
  • the heat dissipation plate 192 and the first circuit board 181 are disposed on a flow path of the heat dissipation airflow inside the casing 11. Further, the heat dissipation plate 192 and the first circuit board 181 are disposed closest to the first airflow in the flow path of the heat dissipation airflow.
  • the position of the inlet 114b, that is, in the flow path of the heat-dissipating airflow, the heat radiating plate 192 is closer to the first airflow inlet 114b with respect to the motor 14, and the first circuit board 181 is also closer to the first airflow inlet 114b with respect to the motor 14.
  • the position of the first airflow inlet 114b on the casing 11 can flow through the first circuit board 181, the transmission 17 and the motor 14 as long as it can satisfy the heat dissipation airflow entering the casing 11 from the first airflow inlet 114b. It meets the heat dissipation effect of the electric circular saw 100.
  • the first airflow outlet 112d is disposed on the front portion 112b of the first receiving portion 112, and the first airflow outlet 112d is openable at least downwardly on the front portion 112b of the first receiving portion 112, so that the heat-dissipating airflow flowing out from the first airflow outlet 112d can be blown To the vicinity of the bottom plate 13 and the bottom plate 13, the dust on the workpiece and the bottom plate 13 can be blown off, thereby improving the cutting accuracy.
  • the first airflow outlet 112d is disposed on a side of the front portion 112b near the bottom plate 13, and the first airflow outlet 112d is not disposed on the upper side of the front portion 112b away from the bottom plate 13, so that heat dissipation at a higher temperature can be avoided.
  • the airflow is blown to the user.
  • the position of the first air outlet 112d on the casing 11 can flow through the first circuit board 181, the transmission 17, and the motor 14 as long as it can satisfy the heat flow from the first air outlet 112d.
  • the second airflow inlet 112e is further disposed on the rear portion 112c of the first accommodation portion 112 on the rear side of the first plane 102, thereby increasing the flow rate of the heat dissipation airflow entering the casing 11.
  • the heat-dissipating airflow entering the casing 11 from the second airflow inlet 112e can flow through the motor 14, so that the heat dissipation effect on the motor 14 can be improved.
  • the electric circular saw 200 of the second embodiment shown in FIG. 15 is different from the electric circular saw 100 of the first embodiment only in the difference between the heat dissipation plate 292 and the second pulley 272b, and can be combined with the other first embodiment.
  • the portions that are compatible with the embodiments can be applied to the present embodiment.
  • the heat dissipation plate 292 is disposed between the motor 24 and the transmission 27, and more specifically, the heat dissipation plate 292 is disposed between the first pulley 271a and the second pulley 272b, so that the first use can be effectively utilized.
  • the space between the pulley 271a and the second pulley 272b is such that the heat dissipation airflow sequentially flows through the second pulley 272b, the heat dissipation plate 292, the first pulley 271a, and the motor 24.
  • a blade 272f is formed on the second pulley 272b to increase the flow velocity of the heat-dissipating airflow.
  • the electric circular saw 300 of the third embodiment shown in FIG. 16 is different from the electric circular saw 100 of the first embodiment only in the difference of the heat dissipation plate 392, and other portions of the first embodiment that can be adapted to the present embodiment. Both can be applied to this embodiment.
  • the heat dissipation plate 392 extends in a direction parallel to the second axis 304 of the motor shaft 341. The extension direction of the heat dissipation plate 392 is also perpendicular to the cutting plane of the saw blade 322, and the heat dissipation plate 392 is also located on the saw blade 322. On the right side.
  • the electric circular saw 400 of the fourth embodiment shown in Fig. 17 differs from the electric circular saw 100 of the first embodiment only in the difference of the transmission, and the other parts of the first embodiment which are compatible with the embodiment are It can be applied to this embodiment.
  • the transmission includes a gear assembly 471 that realizes power transmission between the intermediate shaft 471d and the motor shaft 441.
  • the gear assembly 471 includes a first gear 471a that rotates synchronously with the motor shaft 441 and an intermediate shaft 471d.
  • the second gear 471b that rotates synchronously, and the intermediate gear 471c that realizes power transmission between the first gear 471a and the second gear 471b may also be disposed.
  • the electric circular saw 500 of the fifth embodiment shown in FIG. 18 is different from the electric circular saw 100 of the first embodiment only in the difference of the motor 54 and the battery pack 551. In the other first embodiment, it can be compared with the present embodiment.
  • the adapted parts can be applied to this embodiment.
  • the first receiving portion 512 and the joint portion 513 are respectively formed at both ends in the extending direction of the handle portion 511.
  • the motor 54 is disposed in the first receiving portion 512, and the battery pack 551 is inserted into the joint portion 513.
  • the direction of the second axis 504 in which the motor shaft 541 rotates is parallel to the cutting plane in which the saw blade 522 extends, and when the bottom plate 53 is in the initial state shown in FIG.
  • the direction in which the battery pack 551 is inserted into the second straight line 505 of the joint portion 513 is parallel to the cutting plane and parallel to the bottom plate plane 531.
  • the installation position and the insertion direction of the battery pack 551 are not limited thereto, and similarly, when the setting position of the battery pack 551 and the insertion direction are fixed, the motor The direction in which the shaft 541 extends is also limited thereto.
  • the electric circular saw 600 of the sixth embodiment shown in FIG. 19 is different from the electric circular saw 100 of the first embodiment only in the difference of the motor 64 and the battery pack 651. In the other first embodiment, it can be compared with the present embodiment.
  • the adapted parts can be applied to this embodiment.
  • the first receiving portion 612 and the joint portion 613 are formed at both ends in the extending direction of the handle portion, the motor 64 is disposed in the first housing portion 612, and the battery pack 651 is inserted into the joint portion 613.
  • the direction of the second axis 604 of the rotation of the motor shaft 641 is parallel to the cutting plane of the saw blade 622, and when the bottom plate 63 is in the initial state shown in FIG.
  • the direction of the second axis 604 of the motor shaft 641 is rotated to the plane of the bottom plate. 631 is perpendicular to each other.
  • the direction in which the battery pack 651 is inserted into the joint portion 613 is perpendicular to the cutting plane and parallel to the bottom plate plane 631.
  • the electric circular saw 700 of the seventh embodiment shown in FIG. 20 is different from the electric circular saw 100 of the first embodiment only in the difference of the power supply device, and the other parts of the first embodiment that can be adapted to the present embodiment are It can be applied to this embodiment.
  • one end of the handle portion 711 extends to form a first receiving portion 712
  • the motor 74 is disposed in the first receiving portion 712
  • the other end of the extending portion of the handle portion 711 is connected to the power line 713
  • the wire 713 is disposed away from the tail end of the handle portion 711 with a plug 713a for introducing a commercial power.
  • the electric circular saw 800 of the eighth embodiment shown in FIG. 21 is different from the electric circular saw 100 of the first embodiment only in that the positions of the motor 84 and the battery pack 851 are different, and the other first embodiment can be combined with the present embodiment.
  • the appropriate parts can be applied to this embodiment.
  • the battery pack 851 is disposed on the left side of the forward direction of the electric circular saw 800, and the motor 84 is disposed on the right side of the electric circular saw 800 near the user, that is, the present embodiment is relatively the first embodiment.
  • the positions of the motor 84 and the battery pack 851 are reversed.
  • the notch 863 formed by the battery pack 851 and the shroud assembly 86 is located on the same side perpendicular to the cutting plane, and the motor 84 is located on the other side.
  • the handle portion 811 is formed at one end in the extending direction thereof in the advancing direction of the electric circular saw 800 to form a joint portion 813 for coupling the battery pack 851, and the other end of the handle portion 811 in the extending direction thereof is formed to accommodate the motor.
  • the first receiving portion 812 of the 84 is formed at one end in the extending direction thereof in the advancing direction of the electric circular saw 800 to form a joint portion 813 for coupling the battery pack 851, and the other end of the handle portion 811 in the extending direction thereof is formed to accommodate the motor.
  • the first receiving portion 812 of the 84 is formed at one end in the extending direction thereof in the advancing direction of the electric circular saw 800 to form a joint portion 813 for coupling the battery pack 851, and the other end of the handle portion 811 in the extending direction thereof
  • the present disclosure provides an electric circular saw.
  • the balance performance of the electric circular saw can be made good.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)

Abstract

一种电圆锯(100),包括:输出轴(121),用于安装锯片(122);电机(14),用于驱动输出轴转动;壳体(11),包括关于第一平面(102)对称设置的把手(111);其中,壳体还包括:第一容纳部(112),形成有用于容纳电机的第一容纳腔(112a),第一容纳部包括设置在第一平面的左侧的第一部和设置在第一平面的右侧的第二部;结合部(113),用于结合一个能给电圆锯供电的电源装置(15);把手具有分别位于其延伸方向上的两端的第一端(111a)和第二端(111b),第一容纳部连接至把手的第一端,结合部连接至把手的第二端。该电圆锯的平衡性能好。

Description

电圆锯 技术领域
本公开涉及一种电动工具,具体涉及一种电圆锯。
背景技术
电圆锯通常包括壳体、锯片、护罩、底板、电机以及电源装置,其中,在现有的电圆锯中,电机通常设置在锯片的一侧,这就造成整个电圆锯的重心位于锯片的一侧,且重心与把手部的对称平面之间的距离比较大,从而导致电圆锯的平衡性能难以改善。
发明内容
为解决现有技术的不足,本公开的目的在于提供一种平衡性能好的电圆锯。
为了实现上述目标,本公开采用如下的技术方案:一种电圆锯,包括:输出轴,用于安装锯片;电机,用于驱动输出轴转动;壳体,包括关于第一平面对称设置的把手;其中,壳体还包括:第一容纳部,形成有用于容纳电机的第一容纳腔,第一容纳部包括设置在第一平面的左侧的第一部和设置在第一平面的右侧的第二部;结合部,用于结合一个能给电圆锯供电的电源装置;把手具有分别位于其延伸方向上的两端的第一端和第二端,第一容纳部连接至把手的第一端,结合部连接至把手的第二端。
进一步地,结合部连接有电能输入端子,电能输入端子用于与电池包上的电能输出端子连接。
进一步地,输出轴在被电机驱动时能绕第一轴线转动,电机包括能绕第二轴线转动的电机轴,输出轴转动的第一轴线和电机转动的第二轴线相互平行。
进一步地,第一轴线和第二轴线之间的距离大于等于50mm且小于等于120mm。
进一步地,在输出轴安装锯片时,锯片在一个切割平面内延展,切割平面垂直于第一轴线;电机分布在切割平面的两侧。
进一步地,电圆锯还包括:传动装置,用于在电机和输出轴之间实现动力的传递;壳体还包括:第二容纳部,形成有用于容纳传动装置的第二容纳腔;把手在第一容纳部和结合部的上侧连接它们两者;第二容纳部在第一容纳部和结合部的下侧连接它们两者。
进一步地,电圆锯还包括:电路板,设置在第二容纳部内;风扇,设置在壳体内;其中,壳体还形成有气流入口和气流出口;在风扇转动时,能在壳体内形成从气流入口流进壳体然后从气流出口流出壳体的散热气流;电路板、传动装置以及电机均设置在散热气流的流通路径上。
进一步地,散热气流依次流经电路板、传动装置和电机。
进一步地,电圆锯还包括:传动装置,用于在电机和输出轴之间实现动力的传递;壳体还包括:第二容纳部,形成有用于容纳传动装置的第二容纳腔;把手、第一容纳部、第二容纳部和结合部依次连接并环绕形成有供用户的手通过以握持把手的通孔。
进一步地,结合部固定连接有电源线,电源线远离结合部的一端设置有插头。
进一步地,壳体还包括:护罩组件,包括定护罩和能相对定护罩转动的动护罩;第一容纳部设置在护罩组件的上侧。
进一步地,电圆锯的重心与第一平面之间的距离大于等于0且小于等于20mm。
进一步地,结合部关于第一平面对称设置。
进一步地,输出轴在被电机驱动时能绕第一轴线转动,结合部和第一容纳部分别设置在一个经过第一轴线且垂直于第一平面的第二平面的两侧。
进一步地,壳体还包括:护罩组件,包括定护罩和能相对定护罩转动的动护罩;动护罩和定护罩之间形成有一个向前敞开以使锯片接触到工件的缺口,第一容纳部设置在把手的前端,结合部设置在把手的后端。
进一步地,电圆锯还包括:底板,形成有用于与工件接触的底板平面;底板还形成有供锯片至少部分穿过的开口;在电圆锯具有最大切割深度时锯片穿过底板的有效切割部分的尺寸最大;其中,在电圆锯具有最大切割深度时,电 机、把手和电池包在底板平面所在的平面内的正投影在一条直线上依次排列。
进一步地,在输出轴安装锯片时,锯片在一个切割平面内延展,电机在切割平面内的正投影位于锯片在切割平面内的正投影之外。
进一步地,锯片为圆形锯片,输出轴能以第一轴线为轴转动,电机包括能以第二轴线为轴转动的电机轴,电机轴转动的第二轴线与输出轴转动的第一轴线相互平行;其中,第一轴线和第二轴线之间的距离大于圆形锯片的半径。
进一步地,电圆锯还包括:风扇,与电机连接;风扇设置在第一容纳腔内。
进一步地,在输出轴安装锯片时,锯片在一个切割平面内延展,电机、把手部和结合部在切割平面内的正投影均位于锯片在切割平面内的正投影之外。
本公开的有益之处在于:通过合理布置电圆锯的结构,尤其是优化电机、壳体、把手等结构的空间排布,使得该电圆锯的重心靠近把手部的对称平面,使得电圆锯的平衡性能好。
附图说明
图1是本公开的第一实施例的电圆锯的立体图;
图2是图1中的电圆锯的另一角度的立体图;
图3是图1中的电圆锯的主视图;
图4是图1中的电圆锯的后视图;
图5是图1中的电圆锯的俯视图;
图6是图5中的电圆锯沿A-A线的剖面图;
图7是图5中的电圆锯沿B-B线的剖面图;
图8是图3中的电圆锯在电池包被拆下后的主视图;
图9是图4中的电圆锯在去除后壳体部后的后视图;
图10是图9所示结构的立体图;
图11是图9所示结构另一个角度的立体图;
图12是图11所示结构在去除散热板后的立体图;
图13是图1中的电圆锯的爆炸图;
图14是图13所示结构的另一角度的立体图;
图15是第二实施例的电圆锯在去除后壳体部的后视图;
图16是第三实施例的电圆锯在去除后壳体部的立体图;
图17是第四实施例的电圆锯在去除后壳体部的后视图;
图18是第五实施例的电圆锯的主视图;
图19是第六实施例的电圆锯的主视图;
图20是第七实施例的电圆锯的主视图;
图21是第八实施例的电圆锯的主视图。
具体实施方式
图1所示的第一实施例的电圆锯100可以用于切割木材、纤维板以及塑料等。如图1和图7所示,电圆锯100包括:壳体11、输出轴121、锯片122、底板13、电机14、电源装置15。其中,壳体11用于容纳电机14等零件,电机14用于提供动力来源,并能驱动输出轴121以第一轴线101为轴转动以输出动力。锯片122用于切割工件,底板13形成有用于与工件接触的底板平面131。电源装置15用于为电机14供电,电源装置15可以是电池包151,还可以为交流电源线。
为了方便说明本公开的技术方案,还定义了如图1所示的上侧、下侧、前侧、后侧、左侧和右侧。
如图2至图7所示,壳体11包括:把手111、第一容纳部112、结合部113和第二容纳部114。把手111用于供用户握持,把手111还关于第一平面102对称设置,该第一平面102与输出轴121转动的第一轴线101相互垂直。把手111具有分别位于其延伸方向上的两端的第一端111a和第二端111b。把手111上还设有扳机开关111c和安全开关111d,扳机开关111c与把手111构成活动连接,在用户握持把手111时,用户的握持该把手111的手能够触发扳机开关111c以启动电圆锯100,安全开关111d设置在把手111上或者把手111附近,安全开关111d用于将扳机开关111c锁定在未被用户触发的位置,从而防止电圆锯100 的意外启动,保护用户不会受到伤害。
第一容纳部112设置在把手111的延伸方向上第一端111a,第一容纳部112包括设置在第一平面102的左侧的第一部和设置在第一平面102的右侧的第二部。第一容纳部112还形成有第一容纳腔112a,电机14设置在第一容纳腔112a内。第一容纳部112的外表面的形状可以被设计成适合于用户握持的结构,也即是说第一容纳部112也可以作为供用户握持的副把手,这样,当用户操作该电圆锯100时,用户的一只手握持把手111,另一只手握持第一容纳部112,从而使得用户能够更稳定的握持电圆锯100,同时因为第一容纳部112既能够用于容纳电机14又能够供用户握持,从而电圆锯100无需单独的另外再设置一个用于供用户握持的副把手,从而能够大大的节约了制造成本,同时还缩小了电圆锯100的体积,减小了电圆锯100的重量。第一容纳部112分布在第一平面102的两侧,从而有利于整个电圆锯100的重心在垂直于第一平面102的方向上更靠近第一平面102设置。例如在本实施方式中,电圆锯100的重心与第一平面102之间的距离大于等于0且小于等于10mm,进一步地,电圆锯100的重心与第一平面102之间的距离大于等于0且小于等于5mm。当整个电圆锯100的重心被设置在靠近第一平面102的位置时,用户在握持电圆锯100时,更加稳定,且用户在操作电圆锯100时,整机也更加平衡,震动较小。
结合部113设置在把手111的延伸方向上的第二端111b,也即是说,结合部113和第一容纳部112分别设置在把手111的延伸方向上的两端。结合部113用于结合给电圆锯100供电的电源装置15。在本实施方式中,电源装置15具体为电池包151。结合部113用于可拆卸的结合电池包151,电池包151在安装至结合部113时能够给电机14进行供电。结合部113连接有电能输入端子(图未示出),电能输入端子用于与电池包151上的电能输出端子连接。在本实施方式中,结合部113也关于上述的第一平面102对称设置,进而安装至结合部113的电池包151也会关于第一平面102对称设置,从而更进一步的有利于整个电圆锯100的重心靠近第一平面102设置,进而有利于用户更稳定的操作该电圆锯100。第一容纳部112、把手111和结合部113在一个垂直于第一轴线101的第一直线103方向上依次排列,把手111位于第一容纳部112和结合部113之间,或者说第一容纳部112和结合部113位于把手111的两侧,从而有利于使得整个电圆锯100的重心在垂直于第一轴线101且平行于第一平面102的方向上靠近 把手111设置,进而提高了电圆锯100的平衡性能。需要说明的是,第一容纳部112、把手111和结合部113在第一直线103方向上依次排列,并不严格限制它们中的任意一个在第一直线103方向上延伸,只要它们整体上看起来基本上在一条直线上,即可以认为第一容纳部112、把手111和结合部113在第一直线103方向上依次排列。在本实施方式中,输出轴121在被电机14驱动时能绕第一轴线101转动,结合部113和第一容纳部112分别设置在一个经过第一轴线101且垂直于第一平面102的第二平面107的两侧。更具体的,第一容纳部112设置在把手111的左侧,也即是第一容纳部112设置在电圆锯100前进方向的一侧,结合部113设置在把手111的右侧,也即是说,结合部113设置在电圆锯100的靠近用户的一侧。
如图4和图9所示,第二容纳部114设置在锯片122的后侧,第二容纳部114形成有第二容纳腔114a。把手111沿一个方向连接了第一容纳部112和结合部113,第二容纳部114沿另一个方向连接了第一容纳部112和结合部113。第二容纳部114还设置在把手111的下侧。更进一步而言,把手111在第一容纳部112和结合部113的上侧连接了它们两者,第二容纳部114在第一容纳部112和结合部113的下侧连接了它们两者。
如图1、图13和图14所示,壳体11还可以被拆分为前壳体部115、后壳体部116和中间壳体部117,其中,前壳体部115设置在中间壳体部117的前侧,后壳体部116设置在中间壳体部117的后侧,它们三者对接形成了整个壳体11。其中,把手111可以由前壳体部115和中间壳体部117对接而成,结合部113也可以由前壳体部115和中间壳体部117对接而成,第一容纳部112可以由前壳体部115、中间壳体部117以及后壳体部116对接而成,第二容纳部114可以由中间壳体部117和后壳体部116对接而成。前壳体部115、后壳体部116和中间壳体部117通过螺钉将它们三者固定为一个整体。
如图7所示,输出轴121用于安装锯片122,输出轴121在相对壳体11以第一轴线101为轴转动时驱动锯片122切割工件。输出轴121沿第一轴线101方向延伸。锯片122为圆形锯片,该圆形锯片以第一轴线101为中心线。锯片122在一个切割平面内延展,锯片122在切割工件时产生的切割面也在切割平面内延展。切割平面与第一轴线101相互垂直,切割平面与第一平面102相互平行。
如图1和图6所示,底板13上还形成有供锯片122至少部分穿过的开口132,使得锯片122能伸出至底板平面131的下侧。在电圆锯100具有最大切割深度时,锯片穿过底板13的有效切割部分的尺寸最大。其中,在电圆锯100具有最大切割深度时,电机14、把手111和电池包151在底板平面131所在的平面内的正投影在一条直线上依次排列。需要说明的是,电机14、把手111和电池包151在底板平面131所在的平面内的正投影是指电机14、把手111和电池包151的投影线均垂直于底板平面131所在的平面。本公开中的正投影是指物体在垂直于投影面的投射线下呈现在投影面上的投影。
进一步而言,为了提高电圆锯100的平衡性能,电机14在切割平面内的正投影位于锯片122在切割平面内的正投影之外,把手111在割平面内的正投影位于锯片122在切割平面内的正投影之外,电池包151在切割平面内的正投影也位于锯片122在切割平面内的正投影之外。第一平面102与切割平面相互重合为同一个平面。
如6至图11所示,电机14可以为无刷电机14,电机14包括能以第二轴线104为轴转动的电机轴141,电机轴141转动的第二轴线104方向还与输出轴121转动的第一轴线101方向相互平行。在电机14设置在第一容纳腔112a内且电池包151安装至结合部113时,电机14和电池包151分别设置在把手111的延伸方向上的两端,也即是说把手111设置在电机14和电池包151之间,从而有利于提高电圆锯100的平衡性能。在本实施方式中,电机14被分布在第一平面102的两侧且电机14也分布在切割平面的两侧,也即是说第一平面102和切割平面均经过电机14,避免电机14设置在第一平面102或者切割平面的一侧而造成的用户不能平稳的操作该电圆锯100的问题。电机14的直径在45mm至65mm之间,电圆锯100的额定功率与电机14的直径的比值大于等于25W/mm且小于等于35W/mm,更进一步而言,该比值为30W/mm。
在本实施方式中,电池包151能沿第二直线105方向插装至结合部113,该第二直线105方向与输出轴121转动的第一轴线101方向相互垂直。在底板平面131与第一轴线101相互平行且锯片122伸出至底板平面131的下侧的部分最大时,电池包151插装至结合部113的第二直线105方向与底板平面131倾斜相交。电池包151在插装至结合部113时,电池包151被分布在第一平面102的两侧且电池包151也分布在切割平面的两侧,也即是说第一平面102和切割 平面均经过电池包151,避免电池包151设置在第一平面102或者切割平面的一侧而造成的用户不能平稳的操作该电圆锯100的问题。更进一步而言,电池包151还关于第一平面102对称设置,从而有利于提高电圆锯100的平衡性能。另外,在本实施方式中,第一容纳部112和结合部113分别设置在第二平面107的两侧,这样,当电池包151插装至结合部113时,电机14和电池包151分别设置在第二平面107的两侧。第一容纳部112、把手111和结合部113在一个垂直于第一轴线101的第一直线103方向上依次排列,这样,当电池包151插装至结合部113时,电机14、把手111和电池包151也基本在第一直线103方向上依次排列。可以理解,在其它实施例中,电机14、把手111和电池包151还可以在一个围绕该锯片122且以第一轴线101为中心线的圆周方向上依次排列。
在本实施方式中,结合部113被分布在第一平面102的两侧且结合部113也分布在切割平面的两侧,也即是说第一平面102和切割平面均经过结合部113,避免结合部113设置在第一平面102或者切割平面的一侧而造成的用户不能平稳的操作该电圆锯100的问题。
在本实施方式中,壳体11还包括护罩组件16。护罩组件16包括定护罩161和动护罩161,定护罩161相对壳体11固定,动护罩161相对壳体11能以第一轴线101为轴转动。定护罩161与壳体11构成固定连接,定护罩161还设置在底板平面131的上侧。动护罩161与壳体11构成以第一轴线101为轴的转动连接,动护罩161至少部分伸出至底板平面131的下侧。动护罩161在相对壳体11转动时,会使得动护罩161与定护罩161之间产生一个使得锯片122露出的缺口163,随着动护罩161的转动,缺口163逐渐增大。在本实施方式中,电机14还位于锯片122的上侧,更进一步而言,电机14也位于定护罩161的上侧。在本实施方式中,缺口163和电机14设置在第二平面107的同一侧,而电池包151位于该平面的另一侧。
电机14转动的第二轴线104和输出轴121转动的第一轴线101之间的距离大于圆形锯片122的半径,更进一步而言,第二轴线104与第一轴线101之间的距离大于等于50mm且小于等于120mm,这使得电机14和输出轴121之间的距离较大,从而有必要在电机轴141和输出轴121之间设置用于实现动力的传递的传动装置17。
如图7至图12所示,传动装置17包括带传动组件171和齿轮传动组172件,当然可以理解,在其它实施例中,传动装置17也可以仅包括带传动组件171或者仅包括齿轮传动组172件。具体而言,在本实施方式中,带传动组件171设置在第二容纳部114形成的第二容纳腔114a内,带传动组件171具体包括:第一带轮171a、第二带轮171b、传动带171c和中间轴171d。第一带轮171a与电机轴141构成固定连接,第二带轮171b与中间轴171d构成固定连接,传动带171c张紧在第一带轮171a和第二带轮171b上,从而实现动力的传递。中间轴171d沿平行于第一轴线101的第三轴线106方向延伸,在电机轴141转动时,传动带171c驱动第二带轮171b转动,第二带轮171b带动中间轴171d一并以第三轴线106为轴转动。齿轮传动组172件包括:与中间轴171d固定连接的第一齿轮172a和与输出轴121连接的第二齿轮172b,第一齿轮172a能够将中间轴171d输出的动力传递至输出轴121,从而驱动输出轴121以第一轴线101为轴转动。在本实施方式中,第一齿轮172a与第二齿轮172b相互啮合,可以理解,在其它实施例中,第一齿轮172a和第二齿轮172b之间还可以设置用户在它们两者之间实现动力的传递的齿轮。
如图9所示,电动工具还包括使得输出轴121的转动被锁定的锁定件123,锁定件123与传动装置17中任意一个转动的零件配合以锁定该零件的转动时均能够实现输出轴121的转动的锁定,或者锁定件123也可以直接与电机轴141或者输出轴121配合以使得输出轴121的转动被锁定。而在本实施方式中,第二带轮171b上形成有锁定槽171e,锁定槽171e沿垂直于第三轴线106的径向向内凹陷。锁定件123部分设置在第二容纳部114所形成的第二容纳腔114a内,锁定件123形成有能嵌入锁定槽171e的锁定凸起123a,锁定件123能相对壳体11转动。在用户操作锁定件123相对壳体11转动时,锁定凸起123a嵌入锁定槽171e内从而锁定第二带轮171b的转动,进而输出轴121的转动被锁定。
如图12和图14所示,在本实施方式中,电路板组件18包括:第一电路板181和第二电路板182,电圆锯100的控制电路可以部分设置在第一电路板181上、部分设置在第二电路板182上,这样可以使得第一电路板181和第二电路板182的尺寸均比较小,从而避免所有的控制电路设置在一个电路板上造成电路板尺寸较大而引起的不便于设置该电路板的问题,进而能够便于将第一电路板181和第二电路板182设置在壳体11内的合适的位置。更进一步而言,第一 电路板181用于控制电机14的输出功率,第二电路板182可以用于控制电池包151,当然并不以此为限。
在本实施方式中,第一电路板181设置在第二容纳部114所形成的第二容纳腔114a内,第一电路板181沿垂直于第一轴线101的一个平面延伸。更进一步而言,传动组件和电机14设置在第一电路板181的同侧,更具体而言,第二带轮171b设置在第一电路板181和第一带轮171a之间。第二电路板182设置在把手111的一端的结合部113处,且第二电路板182在一个与第二直线105方向平行且与第一轴线101方向平行的平面内延伸。这样,可以使得第一电路板181和第二电路板182能够高效的利用壳体11的内部空间,从而能够有利于缩小壳体11的尺寸。事实上,在其它实施例中,当控制电路均设置在一个电路板上时,该电路板可以设置在结合部113处也可以设置在第二容纳腔114a内。
如图9至图11所示,散热组件19包括:风扇191和散热板192,风扇191转动时能产生用于给电机14散热的散热气流,散热板192上形成有用于导向散热气流的流向的散热筋192a。
风扇191设置在第一容纳部112所形成的第一容纳腔112a内,风扇191固定安装至电机轴141以随电机轴141同步转动。在本实施方式中风扇191可以为离心式风扇191。第一容纳部112分布在第一平面102的两侧,第一容纳部112位于第一平面102的前侧的部分可以定义为前部112b,第一容纳部112位于第一平面102后侧的部分可以定义为后部112c,风扇191设置在前部112b所围绕而成的空间内。
散热板192设置在第二容纳部114所形成的第二容纳腔114a内,在本实施方式中,散热板192可以和第一电路板181固定连接在一起。更具体而言,散热板192在一个垂直于第一轴线101的平面内延展,散热板192位于锯片122的后侧。
如图1至图2所示,为了产生能够对电机14、电路板组件18进行散热的散热气流,壳体11上还形成有第一气流入口114b和第一气流出口112d,第一气流入口114b连通壳体11的内外,第一气流出口112d也连通壳体11的内外,这样当风扇191转动时,能产生从第一气流入口114b流入壳体11内部,然后再通过第一气流出口112d流出至壳体11外部的散热气流。在本实施方式中,第 一气流入口114b和第一气流出口112d在壳体11上的位置使得散热气流至少能够流经散热板192、传动装置17以及电机14,从而能够对第一电路板181、传动装置17以及电机14进行散热。具体而言,第一气流入口114b设置在第二容纳部114上,在本实施方式中,第一气流入口114b在第二容纳部114上的位置与第一电路板181的位置相对应,这样使得从第一气流入口114b流进壳体11的散热气流能够首先流进第一电路板181。散热板192和第一电路板181设置在散热气流在壳体11内部的流通路径上,更进一步而言,散热板192和第一电路板181设置在散热气流的流通路径的最靠近第一气流入口114b的位置,也即是说,在散热气流的流通路径上,散热板192相对电机14更靠近第一气流入口114b,第一电路板181相对电机14也更靠近第一气流入口114b。事实上,第一气流入口114b在壳体11上的位置只要能够满足从第一气流入口114b进入壳体11内的散热气流能够依次流经第一电路板181、传动装置17以及电机14,即符合电圆锯100的对散热效果的需求。
因为风扇191设置在第一容纳部112的位于第一平面102的前侧的前部112b上,且风扇191在第一容纳腔112a内的位置也与前部112b相对应,因此第一气流出口112d设置在第一容纳部112的前部112b上,第一气流出口112d在第一容纳部112的前部112b上至少能向下敞开,这样,从第一气流出口112d流出的散热气流能够吹向底板13以及底板13附近,从而能够将工件、底板13上的灰尘吹散,进而提高切割精度。更具体而言,第一气流出口112d设置在前部112b的靠近底板13的一侧,且前部112b的远离底板13的上侧没有设置第一气流出口112d,从而能够避免温度较高的散热气流吹向用户。同样的,第一气流出口112d在壳体11上的位置只要能够满足从第一气流出口112d流出壳体11的散热气流能够流经第一电路板181、传动装置17以及电机14即可。为了提高散热效果,第一容纳部112的位于第一平面102的后侧的后部112c上还设置有第二气流入口112e,从而提高进入壳体11的散热气流的流量。从第二气流入口112e进入壳体11的散热气流能够流经电机14,从而能够提高对电机14的散热效果。
图15所示的第二实施例的电圆锯200与第一实施例中的电圆锯100的区别仅在于散热板292和第二带轮272b的不同,其它第一实施例中能与本实施例相适应的部分均可以应用到本实施例中。在本实施方式中,散热板292设置在电机24和传动装置27之间,更具体而言,散热板292设置在第一带轮271a和第 二带轮272b之间,从而可以有效的利用第一带轮271a和第二带轮272b之间的空间,这样,散热气流会依次流经第二带轮272b、散热板292、第一带轮271a以及电机24。第二带轮272b上形成有扇叶272f,从而增大散热气流的流速。
图16所示的第三实施例的电圆锯300与第一实施例中的电圆锯100的区别仅在于散热板392的不同,其它第一实施例中能与本实施例相适应的部分均可以应用到本实施例中。在本实施方式中,散热板392沿平行于电机轴341转动的第二轴线304的方向延伸,散热板392的延伸方向还与锯片322的切割平面相互垂直,散热板392还位于锯片322的右侧。
图17所示的第四实施例的电圆锯400与第一实施例中的电圆锯100的区别仅在于传动装置的不同,其它第一实施例中能与本实施例相适应的部分均可以应用到本实施例中。在本实施方式中,传动装置包括:在中间轴471d和电机轴441之间实现动力传递的齿轮组件471,齿轮组件471包括与电机轴441构成同步转动的第一齿轮471a和与中间轴471d构成同步转动的第二齿轮471b,第一齿轮471a和第二齿轮471b之间还可以设置在它们两者之间实现动力传递的中间齿轮471c。
图18所示的第五实施例的电圆锯500与第一实施例中的电圆锯100的区别仅在于电机54以及电池包551的不同,其它第一实施例中能与本实施例相适应的部分均可以应用到本实施例中。在本实施方式中,把手部511的延伸方向上的两端依然分别形成有第一容纳部512和结合部513,电机54设置在第一容纳部512内,电池包551插装至结合部513。其中,电机轴541转动的第二轴线504方向与锯片522延伸的切割平面相互平行,且当底板53位于图18所示的初始状态时,电机轴541转动的第二轴线504方向与底板平面531倾斜相交。电池包551插装至结合部513的第二直线505方向与切割平面相互平行且与底板平面531相互平行。当然,可以理解,当电机轴541的延伸方向固定时,电池包551的设置位置以及插装方向并不以此为限,同样的,当电池包551的设置位置以及插装方向固定时,电机轴541的延伸方向也并以此为限。
图19所示的第六实施例的电圆锯600与第一实施例中的电圆锯100的区别仅在于电机64以及电池包651的不同,其它第一实施例中能与本实施例相适应的部分均可以应用到本实施例中。在本实施方式中,把手部的延伸方向上的两 端依然分别形成有第一容纳部612和结合部613,电机64设置在第一容纳部612内,电池包651插装至结合部613。其中,电机轴641转动的第二轴线604方向与锯片622延伸的切割平面相互平行,且当底板63位于图18所示的初始状态时,电机轴641转动的第二轴线604方向与底板平面631相互垂直。电池包651插装至结合部613的方向与切割平面相互垂直且与底板平面631相互平行。当然,可以理解,当电机轴641的延伸方向固定时,电池包651的设置位置以及插装方向并不以此为限,同样的,当电池包651的设置位置以及插装方向固定时,电机轴641的延伸方向也并以此为限。
图20所示的第七实施例的电圆锯700与第一实施例中的电圆锯100的区别仅在于电源装置的不同,其它第一实施例中能与本实施例相适应的部分均可以应用到本实施例中。在本实施方式中,把手部711延伸方向上的一端形成第一容纳部712,电机74设置在第一容纳部712内,而在把手部711延伸方向上的另一端连接有电源线713,电源线713远离把手部711的尾端设置用于引入市电的插头713a。
图21所示的第八实施例的电圆锯800与第一实施例中的电圆锯100的区别仅在于电机84以及电池包851的位置不同,其它第一实施例中能与本实施例相适应的部分均可以应用到本实施例中。在本实施方式中,电池包851设置在电圆锯800的前进方向的左侧,电机84设置在电圆锯800的靠近用户的右侧,也即是说,本实施例相对第一实施例,将电机84和电池包851的位置进行了左右调换,这时,电池包851和护罩组件86所形成的缺口863位于一个垂直于切割平面的同一侧,而电机84则位于另一侧。对应的,把手部811在其延伸方向上的靠近电圆锯800前进方向的一端形成了用于结合电池包851的结合部813,把手部811在其延伸方向上的另一端形成用于容纳电机84的第一容纳部812。
以上显示和描述了本公开的基本原理、主要特征和优点。本行业的技术人员应该了解,上述实施例不以任何形式限制本公开,凡采用等同替换或等效变换的方式所获得的技术方案,均落在本公开的保护范围内。
工业实用性
本公开提供了一种电圆锯,通过合理布置电圆锯的结构,尤其是优化电机、壳体、把手等结构的空间排布,可以使得电圆锯的平衡性能好。

Claims (20)

  1. 一种电圆锯,包括:输出轴,用于安装锯片;
    电机,用于驱动所述输出轴转动;
    壳体,包括关于第一平面对称设置的把手;
    其中,所述壳体还包括:
    第一容纳部,形成有用于容纳所述电机的第一容纳腔,所述第一容纳部包括设置在所述第一平面的左侧的第一部和设置在所述第一平面的右侧的第二部;
    结合部,用于结合一个能给所述电圆锯供电的电源装置;
    所述把手具有分别位于其延伸方向上的两端的第一端和第二端,所述第一容纳部连接至所述把手的第一端,所述结合部连接至所述把手的第二端。
  2. 根据权利要求1所述的电圆锯,其特征在于:
    所述结合部连接有电能输入端子,所述电能输入端子用于与电池包上的电能输出端子连接。
  3. 根据权利要求1所述的电圆锯,其特征在于:
    所述输出轴在被所述电机驱动时能绕第一轴线转动,所述电机包括能绕第二轴线转动的电机轴,所述输出轴转动的第一轴线和所述电机转动的第二轴线相互平行。
  4. 根据权利要求3所述的电圆锯,其特征在于:
    所述第一轴线和所述第二轴线之间的距离大于等于50mm且小于等于120mm。
  5. 根据权利要求3所述的电圆锯,其特征在于:
    在所述输出轴安装所述锯片时,所述锯片在一个切割平面内延展,所述切 割平面垂直于所述第一轴线;所述电机分布在所述切割平面的两侧。
  6. 根据权利要求1所述的电圆锯,其特征在于:
    所述电圆锯还包括:
    传动装置,用于在所述电机和所述输出轴之间实现动力的传递;
    所述壳体还包括:
    第二容纳部,形成有用于容纳所述传动装置的第二容纳腔;
    所述把手在所述第一容纳部和所述结合部的上侧连接它们两者;
    所述第二容纳部在所述第一容纳部和所述结合部的下侧连接它们两者。
  7. 根据权利要求6所述的电圆锯,其特征在于:
    所述电圆锯还包括:
    电路板,设置在所述第二容纳部内;
    风扇,设置在所述壳体内;
    其中,所述壳体还形成有气流入口和气流出口;在所述风扇转动时,能在所述壳体内形成从所述气流入口流进所述壳体然后从所述气流出口流出所述壳体的散热气流;所述电路板、传动装置以及所述电机均设置在所述散热气流的流通路径上。
  8. 根据权利要求7所述的电圆锯,其特征在于:
    所述散热气流依次流经所述电路板、所述传动装置和所述电机。
  9. 根据权利要求1所述的电圆锯,其特征在于:
    所述电圆锯还包括:
    传动装置,用于在所述电机和所述输出轴之间实现动力的传递;
    所述壳体还包括:
    第二容纳部,形成有用于容纳所述传动装置的第二容纳腔;
    所述把手、第一容纳部、第二容纳部和结合部依次连接并环绕形成有供用户的手通过以握持所述把手的通孔。
  10. 根据权利要求1所述的电圆锯,其特征在于:
    所述结合部固定连接有电源线,所述电源线远离所述结合部的一端设置有插头。
  11. 根据权利要求1所述的电圆锯,其特征在于:
    所述壳体还包括:
    护罩组件,包括定护罩和能相对所述定护罩转动的动护罩;
    所述第一容纳部设置在所述护罩组件的上侧。
  12. 根据权利要求1所述的电圆锯,其特征在于:
    所述电圆锯的重心与第一平面之间的距离大于等于0且小于等于20mm。
  13. 根据权利要求1所述的电圆锯,其特征在于:
    所述结合部关于所述第一平面对称设置。
  14. 根据权利要求1所述的电圆锯,其特征在于:
    所述输出轴在被所述电机驱动时能绕第一轴线转动,所述结合部和所述第一容纳部分别设置在一个经过所述第一轴线且垂直于所述第一平面的第二平面的两侧。
  15. 根据权利要求1所述的电圆锯,其特征在于:
    所述壳体还包括:
    护罩组件,包括定护罩和能相对所述定护罩转动的动护罩;
    所述动护罩和所述定护罩之间形成有一个向前敞开以使所述锯片接触到工 件的缺口,所述第一容纳部设置在所述把手的前端,所述结合部设置在所述把手的后端。
  16. 根据权利要求1所述的电圆锯,其特征在于:
    所述电圆锯还包括:
    底板,形成有用于与工件接触的底板平面;
    所述底板还形成有供所述锯片至少部分穿过的开口;
    在所述电圆锯具有最大切割深度时所述锯片穿过底板的有效切割部分的尺寸最大;
    其中,在所述电圆锯具有最大切割深度时,所述电机、所述把手和所述电池包在所述底板平面所在的平面内的正投影在一条直线上依次排列。
  17. 根据权利要求1所述的电圆锯,其特征在于:
    在所述输出轴安装所述锯片时,所述锯片在一个切割平面内延展,所述电机在所述切割平面内的正投影位于所述锯片在所述切割平面内的正投影之外。
  18. 根据权利要求1所述的电圆锯,其特征在于:
    所述锯片为圆形锯片,所述输出轴能以第一轴线为轴转动,所述电机包括能以第二轴线为轴转动的电机轴,所述电机轴转动的第二轴线与所述输出轴转动的第一轴线相互平行;其中,所述第一轴线和所述第二轴线之间的距离大于所述圆形锯片的半径。
  19. 根据权利要求1所述的电圆锯,其特征在于:
    所述电圆锯还包括:
    风扇,与所述电机连接;
    所述风扇设置在所述第一容纳腔内。
  20. 根据权利要求1所述的电圆锯,其特征在于:
    在所述输出轴安装所述锯片时,所述锯片在一个切割平面内延展,所述电机、所述把手部和所述结合部在所述切割平面内的正投影均位于所述锯片在所述切割平面内的正投影之外。
PCT/CN2018/120769 2017-12-13 2018-12-13 电圆锯 WO2019114777A1 (zh)

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