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WO2019169673A1 - 电圆锯 - Google Patents

电圆锯 Download PDF

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Publication number
WO2019169673A1
WO2019169673A1 PCT/CN2018/080079 CN2018080079W WO2019169673A1 WO 2019169673 A1 WO2019169673 A1 WO 2019169673A1 CN 2018080079 W CN2018080079 W CN 2018080079W WO 2019169673 A1 WO2019169673 A1 WO 2019169673A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery pack
circular saw
electric circular
housing
motor
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/080079
Other languages
English (en)
French (fr)
Inventor
吹拔正敏
鲁松松
王洪斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Chervon Industry Co Ltd
Original Assignee
Nanjing Chervon Industry Co Ltd
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 Nanjing Chervon Industry Co Ltd filed Critical Nanjing Chervon Industry Co Ltd
Publication of WO2019169673A1 publication Critical patent/WO2019169673A1/zh
Priority to US16/994,850 priority Critical patent/US20200376705A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02Construction of casings, bodies or handles
    • 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
    • B23D47/12Sawing 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
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/008Cooling means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B25/00Hand cutting tools involving disc blades, e.g. motor-driven
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B9/00Portable power-driven circular saws for manual operation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27GACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws
    • B27G19/04Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws for manually-operated power-driven circular saws
    • 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
    • B23D47/126Angle drives

Definitions

  • the invention relates to a power tool, in particular to an electric circular saw.
  • Electric circular saws are commonly used for users to cut wood, plastic, and the like.
  • the axis of rotation of the saw blade is usually parallel to the axis of the motor, and a planetary gear reduction mechanism is usually provided between the saw blade and the motor, but this will cause the efficiency of the electric circular saw to be low.
  • the existing DC-type electric circular saw usually has a low rated input power, and the nominal voltage of the battery pack may not meet the requirements of high power, long working time, and strong load capacity.
  • the object of the present invention is to provide an electric circular saw with high efficiency, long working time and reasonable structure setting.
  • An electric circular saw includes: a saw blade, a motor, a housing, a bottom plate, a worm gear assembly, and a power supply device; the saw blade is rotatable about a first axis, and the motor includes a motor shaft for driving the rotation of the saw blade, the housing Forming a receiving portion for accommodating the motor, the bottom plate is formed with a bottom plate plane for contacting the member to be cut, the worm gear assembly realizes power transmission between the motor and the saw blade, and the power supply device includes at least one source for supplying energy to the motor A battery pack; wherein a ratio of a nominal voltage of one battery pack to a weight of the electric circular saw is greater than or equal to 6 V/Kg and less than or equal to 12 V/Kg.
  • the housing is further formed with: a main handle and an auxiliary handle;
  • the main handle includes a first grip for the user to hold with one hand, and the auxiliary handle includes a second for the user to hold the other hand a grip portion;
  • the first grip portion is symmetrically disposed with respect to a plane of symmetry, the second grip portion extends in a direction obliquely intersecting the plane of symmetry; and the extending direction of the second grip portion is obliquely intersected with the plane of symmetry to form an angle greater than or equal to An angle of 50 degrees and less than or equal to 70 degrees.
  • the power supply unit includes a plurality of battery cells; the ratio of the diameter of the saw blade to the number of the cells of the battery unit included in the power supply unit is 6 mm/s or more and 11 mm/s or less.
  • the number of battery packs is one; the axis of rotation of the motor shaft relative to the housing is perpendicular to the first axis, and the housing is further formed with a main handle for the user to hold; in the direction of the axis along the axis of the motor, The battery pack is placed between the main handle and the motor.
  • the housing is formed with a receiving groove that is open to the outside; the battery pack is detachably coupled to the receiving slot in a straight line direction; wherein the direction in which the battery pack is coupled to the receiving slot is perpendicular to the first axis; the bottom plate and the housing constitute Rotating connection with a second axis parallel to the first axis; when the bottom plate plane is parallel to the first axis and the distance between the bottom plate plane and the first axis is the closest, the battery pack is coupled to the receiving groove and the bottom plate The plane intersection forms an angle of an angle greater than or equal to 70 degrees and less than or equal to 90 degrees.
  • the battery pack includes an L-shaped battery pack case, and the battery pack case includes a first receiving portion and a second receiving portion that are perpendicular to each other; the battery pack further includes: a first type of cell unit and a second type of cell a unit; the first type of cell unit is at least partially disposed in the first receiving portion, and the second type of cell unit is at least partially disposed in the second receiving portion; when the battery pack is coupled to the housing, the first receiving portion is at least partially inserted into the receiving portion In the slot, the second receiving portion is located outside the receiving slot.
  • the number of the battery packs is 2, which are respectively a first battery pack and a second battery pack;
  • the housing is formed with: a first joint portion and a second joint portion, and the first joint portion is detachably coupled with the first battery pack,
  • the second joint is detachably coupled to the second battery pack;
  • the first joint is disposed between the motor and the second joint in a direction along an axis of the motor shaft.
  • the direction in which the first battery pack is coupled to the first joint portion and the direction in which the second battery pack is coupled to the second joint portion are perpendicular to each other.
  • the housing is further formed with: a main handle and a joint portion; the main handle includes a first grip portion for the user to hold, the joint portion is detachably coupled with the battery pack; the main handle connects the joint portion and the receiving portion; the bottom plate The plane extends in the first plane; the projection of the battery pack in the first plane is outside the projection of the bottom panel in the first plane when the plane of the bottom plate is parallel to the first axis.
  • the battery pack includes: a plurality of battery cells and a battery pack case; a battery pack case around which a battery compartment for accommodating the cell unit is formed; and the battery pack case is formed when the battery pack is coupled to the case The groove in which the joint is embedded.
  • the battery pack has a nominal voltage of 48V.
  • the battery pack includes a plurality of battery cell groups connected in series, and each of the battery cell groups includes two battery cells connected in parallel with each other.
  • the housing is further formed with: a main handle for the user to hold; the main handle is symmetrically disposed about a plane of symmetry, and the axis of the motor shaft is located in a plane of symmetry with respect to the axis of rotation of the housing.
  • the battery pack when the battery pack is coupled to the housing, the battery pack is also symmetrically disposed about a plane of symmetry.
  • the electric circular saw further includes: a circuit board disposed in the accommodating portion; the circuit board is electrically connected with the motor; the housing is formed with an airflow inlet and an airflow outlet, and flows into the housing from the airflow inlet and flows out of the housing from the airflow outlet The airflow sequentially flows through the circuit board and the motor.
  • the circuit board includes a circuit substrate that extends in a plane perpendicular to an axis of rotation of the motor shaft relative to the housing.
  • the electric circular saw further includes: a heat dissipation plate connected to the circuit board; the heat dissipation plate includes: a heat dissipation substrate extending in the second plane; and the second plane is perpendicular to an axis of rotation of the motor shaft relative to the housing.
  • the heat dissipation plate further includes: a sidewall and a heat dissipation rib; the sidewall surrounds the heat dissipation substrate at an edge of the heat dissipation substrate, and the heat dissipation rib is formed on the sidewall; the heat dissipation rib extends in a direction parallel to an axis of the motor shaft rotating relative to the housing .
  • the heat dissipation plate further includes: a sidewall and a plurality of heat dissipation ribs; the sidewall surrounds the heat dissipation substrate at an edge of the heat dissipation substrate, and a plurality of heat dissipation ribs are formed on the sidewall; and adjacent two heat dissipation ribs are further formed for An air flow path that directs the flow of air; the electric circular saw also includes wires for the connected circuit board and the motor; the wire passes through the air flow path between the two heat dissipation ribs.
  • the receiving portion is made of a metal material.
  • the electric circular saw further comprises: a circuit board, a wire and a limit cover; the circuit board is disposed in the receiving portion, the wire is connected to the circuit board and the motor, the limit cover is formed around the partially open limit space; the limit cover is the wire Restricted in the limit space to avoid the wires contacting the receptacle.
  • the axis of rotation of the motor shaft relative to the housing is perpendicular to the first axis.
  • An electric circular saw includes: a saw blade, a motor, a casing, a bottom plate and a worm gear assembly; the saw blade is rotatable about a first axis, and the motor includes a motor shaft for driving the rotation of the saw blade, and the housing is formed for a housing accommodating the motor, the bottom plate is formed with a bottom plate plane for contacting the member to be cut, the worm gear assembly realizes the transmission of power between the motor and the saw blade; the axis of the motor shaft rotating relative to the housing is perpendicular to the first axis;
  • the body further includes: a joint for coupling the at least one battery pack to the housing and a main handle for the user to hold; the joint connects the main handle and the receiving portion.
  • the invention has the advantages that the electric circular saw has high efficiency, long working time and reasonable structure setting.
  • Figure 1 is a perspective view of an electric circular saw according to a first embodiment of the present invention
  • Figure 2 is a perspective view of another angle of the electric circular saw of Figure 1;
  • Figure 3 is a plan 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 perspective view of the electric circular saw of Figure 1 when the battery pack is separated;
  • Figure 7 is a perspective view of the electric circular saw of Figure 1 when the housing is partially removed;
  • Figure 8 is a perspective view of the electric circular saw of Figure 1 with the housing and the limit cover partially removed;
  • Figure 9 is a perspective view of another angle of the structure shown in Figure 8.
  • Figure 10 is a perspective view of the battery pack of Figure 1 when the battery pack housing is partially separated;
  • Figure 11 is a perspective view of the circuit board and the heat sink of Figure 10;
  • Figure 12 is a perspective view of the electric circular saw of the second embodiment
  • Figure 13 is a rear elevational view of the electric circular saw of Figure 12;
  • Figure 14 is a perspective view of the electric circular saw of Figure 12 when the battery pack is separated;
  • Figure 15 is a perspective view of the electric circular saw of the third embodiment
  • Figure 16 is a rear elevational view of the electric circular saw of Figure 15;
  • Figure 17 is a perspective view of the electric circular saw of Figure 15 with the battery pack separated.
  • the electric circular saw 100 of the first embodiment shown in Fig. 1 is used for a user to cut a piece to be cut, for example, for a user to cut wood, plastic, stone, or the like.
  • the electric circular saw 100 includes a housing 11, a saw blade 12, a motor 13, a power supply unit, and a bottom plate 15, wherein the power supply unit includes a battery pack for supplying energy to the electric circular saw 100. 14.
  • the number of battery packs 14 is one
  • the saw blade 12 is a circular saw blade 12 that is rotatable about the first axis 101.
  • the housing 11 includes a housing portion 111 for housing the motor 13, and the housing portion 111 is formed with a lumen for housing the motor 13.
  • the housing 11 is also formed with a main handle 112 and an auxiliary handle 113.
  • the accommodating portion 111 is located at one side of the saw blade 12, and the main handle 112 is for holding by one hand of the user to operate the electric circular saw 100.
  • the main handle 112 is further provided with an operation switch 112a for controlling the start and stop of the electric circular saw 100.
  • the auxiliary handle 113 is for holding by the user's other hand.
  • the saw blade 12 cuts the workpiece as it rotates relative to the housing 11 about the first axis 101.
  • the motor 13 includes a motor shaft 131 that is rotatable about a motor axis 102 that is perpendicular to the first axis 101.
  • the battery pack 14 can be detachably coupled to the housing 11 by a user to supply power to the motor 13.
  • the bottom plate 15 includes a bottom plate plane 151 for contacting the member to be cut, the bottom plate flat 151 extending in a first plane.
  • the bottom plate 15 also forms a rotational connection with the housing 11 which is pivotable about a second axis 103 which is also parallel to the first axis 101 of the saw blade 12.
  • the size of the cutting portion 121 extending from the saw blade 12 to the lower side of the bottom plate plane 151 is also changed, thereby being able to adjust the cutting member to be cut.
  • the size of the size is also changed, thereby being able to adjust the cutting member to be cut.
  • the receiving portion 111 extends substantially in the direction of the first straight line 104, and the direction of the first straight line 104 is perpendicular to the first axis 101 at which the saw blade 12 rotates.
  • the motor 13 can also be arranged substantially in the direction of the first line 104 in the interior of the receptacle 111, so that the motor axis 102 and the first line 104 can be substantially parallel or coincident with one another.
  • the first straight line 104 also obliquely intersects the bottom plate plane 151 to form an angle greater than 0 degrees and less than or equal to 20 degrees.
  • the electric circular saw 100 further includes a worm gear assembly 16 that effects power transfer between the motor 13 and the saw blade 12.
  • the main handle 112 includes a first grip portion 112b for the user to hold, the first grip portion 112b extending substantially in the first direction 105, and the auxiliary handle 113 includes a second grip portion 113a for the user to hold, The second grip portion 113a extends substantially in the second direction 106.
  • the main handle 112 is also symmetrically arranged about a plane of symmetry 107 which is perpendicular to the first axis 101. When the bottom plate plane 151 and the first axis 101 are parallel to each other and the distance between the bottom plate plane 151 and the first axis 101 is the closest, the symmetry plane 107 of the main handle 112 is also perpendicular to the bottom plate plane 151, and the first grip extends first.
  • the direction 105 intersects the floor plane 151 obliquely to form an angle of 30 degrees or more and 60 degrees or less, and the second direction 106 in which the second grip portion 113a extends is parallel to the floor plane 151 or intersects the floor plane 151.
  • the second direction 106 extending from the second grip portion 113a is obliquely intersected with the plane of symmetry 107 to form an angle of angle greater than or equal to 50 degrees and less than or equal to 70 degrees, thereby
  • the directions of the arms of the two hands cross each other, thereby making the arrangement of the main handle 112 and the auxiliary handle 113 more ergonomic.
  • the housing 11 is also formed with a coupling portion 114 for detachably engaging the battery pack 14, the coupling portion 114 is disposed at one end of the main handle 112, the main handle 112 is coupled to the coupling portion 114 and the receiving portion 111, and the coupling portion 114 is also connected to the main handle 112 and the accommodating portion 111, such that the main handle 112, the accommodating portion 111 and the joint portion 114 are sequentially connected and surround an opening 115 formed with a hand for the user to hold the first grip portion 112b, the opening 115 Located on the side of the motor 13 remote from the worm gear assembly 16, that is, the motor 13 is disposed between the opening 115 and the worm gear assembly 16.
  • the battery pack 14 is inserted into the joint portion 114 in the direction of the second straight line 108, which may be parallel or coincident with the motor axis 102, and the second straight line 108 is also perpendicular to the first axis 101 of the saw blade 12 being rotated.
  • the projection of the battery pack 14 in the first plane is located at the first plane of the bottom plate 15
  • the center of gravity of the entire circular saw 100 is moved back so that, in a direction perpendicular to the first axis 101, The center of gravity of the electric circular saw 100 can be located between the first grip portion 112b and the second grip portion 113a, thereby improving the balance performance of the whole machine.
  • the projection of the first grip portion 112b in the first plane is located in the projection of the bottom plate 15 in the first plane.
  • the projection of the second grip portion 113a in the first plane is located within the projection of the bottom plate 15 in the first plane, such that the distance between the first grip portion 112b and the second grip portion 113a can be made It is large enough so that the user can more stably manipulate the electric circular saw 100 when the user holds the first grip portion 112b and the second grip portion 113a with both hands.
  • the battery pack 14 includes a battery pack case 141 and a battery unit 142, wherein the battery pack case 141 is formed around a battery compartment 143 for accommodating the battery unit 142, and the battery unit 142.
  • the number is more than one.
  • the rated input power of the electric circular saw 100 is greater than or equal to 1.3 KW and less than or equal to 1.7 KW. Further, the rated input power of the electric circular saw 100 is 1.5 KW, and the diameter of the saw blade 12 is greater than or equal to 0.15 m. Further, it is 0.21 m or less, and further, the diameter of the saw blade 12 is 0.185 m.
  • the ratio of the nominal voltage of the battery pack 14 to the weight of the electric circular saw 100 is greater than It is equal to 6 V/Kg and less than or equal to 12 V/Kg, and further, the ratio of the nominal voltage of the battery pack 14 to the weight of the electric circular saw 100 is 7.5 V/Kg or more and 9 V/Kg or less.
  • the nominal voltage of the battery pack 14 can be set within a reasonable range to meet the requirements of the rated operating condition of the complete machine, and the rated capacity of the battery pack 14 can be set according to the nominal voltage, so that the rated capacity can be satisfied.
  • the ratio of the nominal voltage of the battery pack 14 to the weight of the electric circular saw 100 in the present invention is a parameter that comprehensively balances the load capacity, working length, size, weight, and the like of the electric circular saw 100.
  • the ratio of the diameter of the saw blade 12 to the number of the cells of the battery unit 142 included in the power supply device is greater than or equal to 6 mm/ Further, the ratio of the diameter of the saw blade 12 to the number of segments of the battery cell unit 142 included in the power supply device is greater than or equal to 6 mm/section and less than or equal to 8.5 mm/section, thereby making the electric circular saw 100 can meet the needs of the user, the discharge time of the power supply unit can also meet the needs of users.
  • the number of battery packs 14 is 1, the nominal voltage of the battery pack 14 is set to 48V, the battery cell unit 142 is a lithium ion battery cell, and the rated voltage at the battery cell unit 142.
  • the battery pack 14 includes at least 12 battery cells 142.
  • all the battery cells 142 in the battery pack 14 constitute a plurality of battery unit 142 groups connected in series, and each battery cell unit 142 includes Two of the above-mentioned battery cells 142, that is, the battery cells 142 in the battery pack 14 are connected in parallel to form one battery cell unit 142, and the plurality of battery cell units 142 are sequentially connected in series.
  • the number of the battery cells 142 is 12, so that the battery pack 14 is not too large in size and the weight is not too heavy if the rated capacity is sufficient.
  • a gap 144 is also interposed between the two battery cells 142 of the battery pack 14, so that the battery pack casing 141 can be recessed inwardly at the gap 144 to form a recess 141a.
  • the joint portion 114 can be located in the recess 141a, the recessed direction of the recess 141a is substantially perpendicular to the bottom plate plane 151, or the recessed direction of the recess 141a intersects with the bottom plate plane 151 to form larger than The angle equal to 70 degrees and less than or equal to 90 degrees, so that when the electric circular saw 100 performs the cutting operation, the bottom plate plane 151 is in contact with the member to be cut, and the battery pack 14 does not contact the workpiece, thereby not affecting the balance of the whole machine.
  • the battery pack 14 When the battery pack 14 is coupled to the joint portion 114, the battery pack 14 is also symmetrically disposed about the plane of symmetry 107, thus facilitating the center of gravity of the electric circular saw 100 to approach the plane of symmetry 107 of the main handle 112, thereby improving the balance performance of the complete machine.
  • the direction in which the battery pack 14 is mounted to the second straight line 108 of the joint portion 114 is also obliquely intersected with the bottom plate plane 151 to form larger than The angle of 0 degrees and less than or equal to 20 degrees, so that the user can plug and unplug the battery pack 14.
  • the motor 13 In the direction along the first straight line 104, the motor 13 is disposed between the battery pack 14 and the worm gear assembly 16, and the battery pack 14, the motor 13, and the worm gear assembly 16 are disposed substantially in the direction of the first straight line 104.
  • the motor axis 102 is located in the plane of the plane of symmetry 107, and the motor 13 is also symmetrically disposed about the plane of symmetry 107 such that the center of gravity of the electric circular saw 100 can be placed closer to the plane of symmetry 107, thereby improving the balancing performance of the circular saw 100.
  • the housing 11 is further formed with an air flow inlet 11a and an air flow outlet 11b, wherein the air flow inlet 11a is disposed at one end of the receiving portion 111 near the opening 115 in the direction of the first straight line 104, and the air flow inlet 11a is open toward the opening 115. Since the battery pack 14 is disposed at the joint portion 114 between the main handle 112 and the accommodating portion 111, when the heat radiating airflow flowing from the airflow inlet 11a into the inside of the casing 11 is generated, the heat radiating airflow can also be external to the casing 11.
  • the airflow outlet 11b is disposed on the accommodating portion 111, and the airflow outlet 11b is also located at one end of the motor 13 near the worm gear assembly 16, so that the heat radiating airflow from the airflow inlet 11a to the airflow outlet 11b can flow through the motor 13 to perform the motor 13 Efficient heat dissipation.
  • the housing 11 is also formed with a casing 116 for accommodating the worm gear.
  • the casing 116 is recessed in a radial direction perpendicular to the motor axis 102 with respect to the accommodating portion 111, so that the heat radiating air flowing out from the air outlet 11b can flow through the casing 116.
  • the outer side is capable of dissipating heat to the worm gear assembly 16 located inside the casing 116.
  • the casing 116 and the accommodating portion 111 are integrally formed, and the inside of the casing 116 and the inside of the accommodating portion 111 are in communication with each other, so that a part of the condensing airflow flows from the inside of the casing 116 and then Flowing out of the saw blade 12 allows for further heat dissipation to the worm gear assembly 16.
  • the electric circular saw 100 further includes a circuit board 17, which is electrically connected to the motor 13 via a wire 171.
  • the circuit board 17 is located in the accommodating portion 111.
  • the circuit board 17 is also disposed between the motor 13 and the airflow inlet 11a, so that the heat dissipating airflow can sequentially flow through the circuit board 17 and the motor 13, so that the heat dissipating airflow can also dissipate heat to the circuit board 17.
  • the circuit board 17 includes a circuit substrate 172 that extends in a plane perpendicular to the motor axis 102. To match the shape of the housing portion 111, the circuit substrate 172 is substantially circular, which can reduce the circuit board 17 at The space occupied in the accommodating portion 111 makes the structure arrangement inside the accommodating portion 111 more compact.
  • the electric circular saw 100 further includes a heat sink 18 that can further dissipate heat from the circuit board 17.
  • the heat radiating plate 18 is disposed in the accommodating portion 111, and the heat radiating plate 18 is also disposed between the airflow inlet 11a and the motor 13.
  • the heat dissipation plate 18 includes a heat dissipation substrate 181 extending in a second plane perpendicular to the motor axis 102.
  • the shape of the heat dissipation substrate 181 may be substantially the same as the shape of the circuit substrate 172.
  • the heat dissipation substrate 181 is also circular. .
  • the heat sink 18 further includes a sidewall 182 that surrounds the heat dissipation substrate 181 along the edge of the circular heat dissipation substrate 181, and the sidewall 182 also extends in a cylindrical surface surrounding the motor axis 102 such that the heat dissipation substrate 181 and the sidewall
  • the accommodation space around the 182 is formed to mount the circuit board 17.
  • a plurality of heat dissipating ribs 183 are disposed on the side wall 182, and the heat dissipating ribs 183 extend in a direction parallel to the motor axis 102.
  • the adjacent two heat dissipating ribs 183 are further formed to guide the heat dissipating air flow along the parallel
  • An airflow passage 184 extending in the direction of the motor axis 102 also extends in a direction parallel to the motor axis 102.
  • the wires 171 connecting the circuit board 17 and the motor 13 can also be disposed in the air flow passage 184 formed between the adjacent two heat radiating ribs 183, and the wires 171 pass through the air flow passage 184, so that the wire 171 can be dissipated on the one hand.
  • the housing portion 111 of the housing 11 and the housing 116 are made of a metal material, so that the hardness of the housing 11 can be made to meet the requirements. Further, the housing portion 111 and the case 116 may be made of an aluminum alloy material, so that the weight of the housing 11 can be reduced.
  • the electric circular saw 100 further includes a limiting cover 19.
  • the limiting cover 19 surrounds the limiting space 191.
  • the limiting cover 19 confines the wire 171 in the limiting space 191 to prevent the wire 171 from contacting the casing wall of the receiving portion 111.
  • the cover 19 is made of an insulating material.
  • the wire 171 is confined in the limiting space 191, so that the wire 171 does not come into contact with the casing wall of the accommodating portion 111, thereby ensuring that the creepage distance between the circuit board 17 and the casing 11 satisfies the safety requirements, and It is also ensured that the creepage distance between the wire 171 and the casing 11 satisfies the safety requirements.
  • the limiting space 191 is open toward the motor 13, and the limiting space 191 is also open toward the airflow inlet 11a, so that the heat-dissipating airflow can flow through the inside of the limiting space 191 formed by the limiting cover 19.
  • the electric circular saw 500 includes the same saw blade 52, motor and bottom plate 55 as those of the first embodiment, except that
  • the power supply unit includes a battery pack 54 having a structure and a different position from that of the first embodiment, and the electric circular saw 500 also includes a housing 51 that is matched to the structure of the battery pack 54.
  • the electric circular saw 500 can have the same rated input power as the first embodiment, and the battery pack 54 can have the same nominal voltage, the same number of battery cells, the same rated capacity, and the same as the first embodiment.
  • the main handle 512, the auxiliary handle 513, and the accommodating portion 511 may be the same as the first embodiment.
  • the portions of the first embodiment that are compatible with the present embodiment can be applied to the present embodiment. The difference between this embodiment and the first embodiment will be mainly described below.
  • the battery pack 54 is disposed between the main handle 512 and the motor in the direction of the motor axis 502.
  • the housing 51 is recessed between the main handle 512 and the receiving portion 511 to form a receiving groove 514.
  • the receiving groove 514 is open outward, and the battery pack 54 can be detachably coupled to the receiving groove 514 in the straight line direction.
  • the direction in which the battery pack 54 is coupled to the receiving slot 514 is perpendicular to the first axis 501 in which the saw blade 52 rotates.
  • the direction in which the battery pack 54 is coupled to the receiving groove 514 intersects with the bottom plate plane 551 to form an angle of 70 degrees or more and less than or equal to The angle of 90 degrees.
  • the receiving slot 514 is disposed between the main handle 512 and the motor, and we know that for the battery pack 54 having a nominal voltage of 48V in this embodiment, when the battery pack 54 is inserted into
  • the battery pack case 541 of the battery pack 54 is also made L-shaped.
  • the battery pack case 541 includes a first housing portion 541a and a second housing portion 541b, and the first housing portion 541a and the second housing portion 541b are perpendicular to each other.
  • the battery cells in the battery pack 54 can be divided into two types, a first type of battery cells at least partially disposed in the first receiving portion 541a and a second type of battery cells at least partially disposed in the second receiving portion 541b.
  • first receiving portion 541a is located in the receiving slot 514
  • second receiving portion 541b is located outside the receiving slot 514, and at this time the first receiving portion 541a is along the motor axis 502.
  • the dimension in the direction is smaller than the dimension of the second receiving portion 541b in the direction along the motor axis 502, so that the size of the electric circular saw 500 in the direction along the motor axis 502 can be reduced, thereby making the overall layout of the entire circular saw 500 more compact. It is advantageous for miniaturization of the electric circular saw 500.
  • Fig. 15 shows the structure of the electric circular saw 600 of the third embodiment.
  • the electric circular saw 600 includes the same saw blade 62, motor and bottom plate 65 as those of the first embodiment, except that
  • the power supply device includes two structures and battery packs different in position from the first embodiment, which are a first battery pack 641 and a second battery pack 642, respectively, and the electric circular saw 600 also includes the first battery pack 641 and The second battery pack 642 is structurally matched to the housing 61.
  • the electric circular saw 600 can have the same rated input power as the first embodiment
  • the first battery pack 641 can have the same nominal voltage as the first embodiment
  • the second battery pack 642 can also have the same as the first embodiment.
  • the same nominal voltage, the sum of the number of battery cells included in the first battery pack 641 and the number of battery cells included in the second battery pack 642 and the battery cells included in the battery pack in the first embodiment The number is the same.
  • the sum of the rated capacities of the first battery pack 641 and the second battery pack 642 is the same as the rated capacity of the battery pack in the first embodiment.
  • the housing 61 may have the same main handle 612, auxiliary handle 613, and housing portion 611 as the first embodiment.
  • the portions of the first embodiment that are compatible with the present embodiment can be applied to the present embodiment. The difference between this embodiment and the first embodiment will be mainly described below.
  • the housing 61 is formed with a first joint portion 614a and a second joint portion 614b for joining the first battery pack 641 and the second battery pack 642, respectively.
  • the first joint portion 614a is disposed between the second joint portion 614b and the motor, and the first joint portion 614a is further disposed between the main handle 612 and the accommodating portion 611.
  • the first battery pack 641 is coupled to the first joint portion 614a
  • the second battery pack 642 is coupled to the second joint portion 614b
  • the first battery pack 641 is disposed in the second battery pack 642 and the motor in the motor axis direction. between.
  • the first joint portion 614a is a housing 61 recessed between the main handle 612 and the receiving portion 611 to form a receiving groove, the receiving groove is open to the outside, and the first battery pack 641 is inserted into the receiving slot in the first direction 600a.
  • the first direction 600a is also perpendicular to the first axis of rotation of the saw blade 62.
  • the second joint portion 614b is connected to the main handle 612 and the receiving portion 611.
  • the main handle 612 is also connected to the second joint portion 614b and the first joint portion 614a, so that the main handle 612, the first joint portion 614a and the second joint portion 614b are common.
  • An opening 615 is formed around the passage of a hand for the user to hold the main handle 612.
  • the second battery pack 642 can be detachably coupled to the second joint portion 614b in the second direction 600b, and the second direction 600b is also perpendicular to the first axis of rotation of the saw blade 62.
  • the first direction 600a intersects with the bottom plate plane 651 to form 70 degrees or more and 90 degrees or less.
  • the angle between the second direction 600b and the bottom plate plane 651 forms an angle greater than or equal to 0 degrees and less than or equal to 20 degrees, and the first direction 600a is also perpendicular to the second direction 600b, thereby facilitating the user to insert and remove the first battery pack 641. And a second battery pack 642.

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Abstract

一种电圆锯(100),包括:锯片(12)、电机(13)、壳体(11)、底板(15)、蜗轮蜗杆组件(16)和电源装置;锯片(12)能以第一轴线(101)为轴转动,电机(13)包括用于驱动锯片(12)转动的电机轴(131),壳体(11)形成有用于容纳电机(13)的容纳部(111),底板(15)形成有用于与待切割件接触的底板平面(151),蜗轮蜗杆组件(16)在电机(13)和锯片(12)之间实现动力的传递,电源装置包括至少一个用于给电机(13)提供能量来源的电池包(14、54、641、642);其中,一个电池包的标称电压与电圆锯的重量的比值大于等于6V/Kg且小于等于12V/Kg。该电圆锯的效率高、工作时间长且结构设置合理。

Description

电圆锯 技术领域
本发明涉及一种动力工具,具体涉及一种电圆锯。
背景技术
电圆锯通常用于供用户切割木材、塑料等。在现有的电圆锯中,锯片转动的轴线通常与电机轴线相互平行,在锯片和电机之间通常会设置行星齿轮减速机构,但是,这样会造成这个电圆锯的效率较低。而且现有的直流类的电圆锯通常额定输入功率较低,电池包的标称电压可能不能满足功率高、工作时间长以及负载能力强等的需求。
发明内容
为解决现有技术的不足,本发明的目的在于提供一种效率高、工作时间长、结构设置合理的电圆锯。
为了实现上述目标,本发明采用如下的技术方案:
一种电圆锯,包括:锯片、电机、壳体、底板、蜗轮蜗杆组件和电源装置;锯片能以第一轴线为轴转动,电机包括用于驱动锯片转动的电机轴,壳体形成有用于容纳电机的容纳部,底板形成有用于与待切割件接触的底板平面,蜗轮蜗杆组件在电机和锯片之间实现动力的传递,电源装置包括至少一个用于给电机提供能量来源的电池包;其中,一个电池包的标称电压与电圆锯的重量的比值大于等于6V/Kg且小于等于12V/Kg。
进一步地,壳体还形成有:主把手和辅助把手;主把手包括用于供用户一只手握持的第一握持部,辅助把手包括用于供用户另一只手握持的第二握持部;其中,第一握持部关于一个对称平面对称设置,第二握持部沿与对称平面倾斜相交的方向延伸;第二握持部的延伸方向与对称平面倾斜相交形成角度大于等于50度且小于等于70度的夹角。
进一步地,电源装置中包括多个电芯单元;锯片的直径与电源装置所包含 的电芯单元的节数的比值大于等于6mm/节且小于等于11mm/节。
进一步地,电池包的数目为1;电机轴相对壳体转动的轴线与第一轴线相互垂直,壳体还形成有用于供用户握持的主把手;在沿电机轴转动的轴线的方向上,电池包设置于主把手和电机之间。
进一步地,壳体形成有向外敞开的接收槽;电池包沿一直线方向可拆卸的结合至接收槽;其中,电池包结合至接收槽的方向与第一轴线相互垂直;底板与壳体构成能以一个平行于第一轴线的第二轴线为轴的转动连接;在底板平面与第一轴线相互平行且底板平面与第一轴线之间距离最近时,电池包结合至接收槽的方向与底板平面相交形成角度大于等于70度且小于等于90度的夹角。
进一步地,电池包包括呈L形的电池包壳体,电池包壳体包括相互垂直的第一容纳部和第二容纳部;电池包还包括:第一类电芯单元和第二类电芯单元;第一类电芯单元至少部分设置在第一容纳部内,第二类电芯单元至少部分设置在第二容纳部内;在电池包结合至壳体时,第一容纳部至少部分插入至接收槽内,第二容纳部位于接收槽外。
或者,电池包的数目为2,分别为第一电池包和第二电池包;壳体形成有:第一结合部和第二结合部,第一结合部可拆卸的结合第一电池包,第二结合部可拆卸的结合第二电池包;在沿电机轴转动的轴线的方向上,第一结合部设置于电机和第二结合部之间。
进一步地,第一电池包结合至第一结合部的方向与第二电池包结合至第二结合部的方向相互垂直。
进一步地,壳体还形成有:主把手和结合部;主把手包括用于供用户握持的第一握持部,结合部可拆卸的结合电池包;主把手连接结合部和容纳部;底板平面在第一平面内延展;在底板平面与第一轴线相互平行时,电池包在第一平面内的投影位于底板在第一平面内的投影之外。
进一步地,电池包包括:多个电芯单元和电池包壳体;电池包壳体,围绕形成有用于容纳电芯单元的电池仓;电池包壳体形成有在电池包结合至壳体时供结合部嵌入的凹槽。
进一步地,电池包的标称电压为48V。
进一步地,电池包多个依次串联的电芯单元组,每个电芯单元组包括两个相互并联的电芯单元。
进一步地,壳体还形成有:用于供用户握持的主把手;主把手关于一个对称平面对称设置,电机轴相对壳体转动的轴线位于对称平面内。
进一步地,在电池包结合至壳体时,电池包也关于对称平面对称设置。
进一步地,电圆锯还包括:设置在容纳部内的电路板;电路板与电机构成电连接;壳体形成有气流入口和气流出口,从气流入口流入壳体且从气流出口流出壳体的散热气流依次流经电路板和电机。
进一步地,电路板包括电路基板,电路基板在一个垂直于电机轴相对壳体转动的轴线的平面内延展。
进一步地,电圆锯还包括:与电路板连接的散热板;散热板包括:在第二平面内延展的散热基板;第二平面与电机轴相对壳体转动的轴线相互垂直。
进一步地,散热板还包括:侧壁和散热筋;侧壁在散热基板的边缘处围绕散热基板,散热筋,形成于侧壁;散热筋沿与电机轴相对壳体转动的轴线平行的方向延伸。
进一步地,散热板还包括:侧壁和多个散热筋;侧壁在散热基板的边缘处围绕散热基板,多个散热筋形成于侧壁;相邻的两个散热筋之间还形成有用于导向气流流动的气流通道;电圆锯还包括用于连接的电路板和电机的导线;导线穿过位于两个散热筋之间的气流通道。
进一步地,容纳部采用金属材料制成。
进一步地,电圆锯还包括:电路板、导线和限位罩;电路板设置在容纳部内,导线连接电路板和电机,限位罩围绕形成有部分敞开的限位空间;限位罩将导线限制在限位空间内以避免导线接触容纳部。
进一步地,电机轴相对壳体转动的轴线与第一轴线相互垂直。
一种电圆锯,包括:锯片、电机、壳体、底板和蜗轮蜗杆组件;锯片能以第一轴线为轴转动,电机包括用于驱动锯片转动的电机轴,壳体形成有用于容纳电机的容纳部,底板形成有用于与待切割件接触的底板平面,蜗轮蜗杆组件在电机和锯片之间实现动力的传递;电机轴相对壳体转动的轴线与第一轴线相 互垂直;壳体还包括:用于将至少一个电池包结合至壳体的结合部和用于供用户握持的主把手;结合部连接主把手和容纳部。
本发明的有益之处在于:电圆锯的效率高、工作时间长且结构设置合理。
附图说明
图1是本发明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中的电圆锯的平面图;
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1中的电圆锯在电池包被分离时的立体图;
图7是图1中的电圆锯在壳体被部分去除时的立体图;
图8是图1中的电圆锯在壳体以及限位罩被部分去除时的立体图;
图9是图8所示结构的另一角度的立体图;
图10是图1中的电池包在电池包壳体被部分分离时的立体图;
图11是图10中的电路板和散热板的立体图;
图12是第二实施例的电圆锯的立体图;
图13是图12中的电圆锯的后视图;
图14是图12中的电圆锯在电池包被分离时的立体图;
图15是第三实施例的电圆锯的立体图;
图16是图15中的电圆锯的后视图;
图17是图15中的电圆锯在电池包被分离时的立体图。
具体实施方式
图1所示的第一实施例的电圆锯100用于供用户切割待切割件,例如可以供用户切割木材、塑料、石材等。
如图1至图9所示,电圆锯100包括:壳体11、锯片12、电机13、电源装置和底板15,其中,电源装置包括用于给电圆锯100提供能量来源的电池包14,在本实施例中,电池包14的数目为1,锯片12为能以第一轴线101为轴转动的圆形锯片12。
壳体11包括用于容纳电机13的容纳部111,容纳部111形成有用于放置电机13的内腔。壳体11还形成有:主把手112和辅助把手113。容纳部111位于锯片12的一侧,主把手112用于供用户的一只手握持以操控电圆锯100,主把手112上还设置有用于控制电圆锯100启停的操作开关112a,辅助把手113用于供用户的另一只手握持。锯片12在相对壳体11以第一轴线101为轴转动时切割工件。电机13包括能以电机轴线102为轴转动的电机轴131,电机轴线102与第一轴线101相互垂直。电池包14能被用户可拆卸的结合至壳体11以给电机13进行供电。底板15包括用于与待切割件接触的底板平面151,底板平面151在第一平面内延展。底板15还与壳体11构成能以第二轴线103为轴的转动连接,该第二轴线103还与锯片12转动的第一轴线101相互平行。这样,当底板15相对壳体11以第二轴线103为轴转动时,锯片12伸出至底板平面151下侧的切割部分121的尺寸也会随之改变,从而能够调节待切割件被切割的尺寸大小。
具体而言,容纳部111基本沿第一直线104方向延伸,该第一直线104方向与锯片12转动的第一轴线101相互垂直。这样,电机13也可以基本沿第一直线104方向布置在容纳部111说围绕而成的内腔中,从而电机轴线102与第一直线104可以基本相互平行或者重合。当底板平面151与第一轴线101相互平行且与第一轴线101之间距离最近时,第一直线104还与底板平面151倾斜相交形成大于0度且小于等于20度的夹角。为了实现电机13能够驱动锯片12以第一轴线101为轴转动,电圆锯100还包括在电机13和锯片12之间实现动力传递的蜗轮蜗杆组件16。
主把手112包括用于供用户握持的第一握持部112b,第一握持部112b基本沿第一方向105延伸,辅助把手113包括用于供用户握持的第二握持部113a,第二握持部113a基本沿第二方向106延伸。其中,主把手112还关于一个对称平面107对称设置,该对称平面107与第一轴线101相互垂直。当底板平面151与第一轴线101相互平行且底板平面151与第一轴线101之间的距离最近时, 主把手112的对称平面107还与底板平面151相互垂直,第一握持延伸的第一方向105与底板平面151倾斜相交形成角度大于等于30度且小于等于60度的夹角,而这时第二握持部113a延伸的第二方向106与底板平面151相互平行或者与底板平面151相交形成角度大于0度且小于20度的夹角,而第二握持部113a延伸的第二方向106还与对称平面107倾斜相交形成角度大于等于50度且小于等于70度的夹角,从而当用户双手分别握持第一握持部112b和第二握持部113a时,两只手的手臂所在的方向相互交叉,进而使得主把手112和辅助把手113的设置更符合人体工程学。
壳体11还形成有用于可拆卸的结合电池包14的结合部114,结合部114设置在主把手112的一端,主把手112连接结合部114和容纳部111,结合部114也连接了主把手112和容纳部111,这样,主把手112、容纳部111和结合部114三者依次连接并围绕形成有一个用于供用户握持第一握持部112b的手通过的开口115,该开口115位于电机13远离蜗轮蜗杆组件16的一侧,也即是说,电机13设置在开口115和蜗轮蜗杆组件16之间。电池包14沿第二直线108方向插装至结合部114,该第二直线108可以与电机轴线102相互平行或者重合,第二直线108还与锯片12转动的第一轴线101相互垂直。其中,在本实施例中,当电池包14插装至结合部114时,在底板平面151与第一轴线101相互平行时,电池包14在第一平面内的投影位于底板15在第一平面内的投影之外,这样,在沿垂直于第一轴线101且平行于底板平面151的方向上,整个电圆锯100的重心后移,从而可以使得在垂直于第一轴线101的方向上,电圆锯100的重心能够位于第一握持部112b和第二握持部113a之间,进而提高整机的平衡性能。
在底板平面151与第一轴线101相互平行且底板平面151与第一轴线101之间的距离最近时,第一握持部112b在第一平面内的投影位于底板15在第一平面内的投影之外,而第二握持部113a在第一平面内的投影位于底板15在第一平面内的投影内,这样,能够使得第一握持部112b和第二握持部113a之间的距离足够大,从而当用户双手分别握持第一握持部112b和第二握持部113a时,用户能够更稳定的操控电圆锯100。
如图1和图10所示,电池包14包括:电池包壳体141和电芯单元142,其中,电池包壳体141围绕形成有用于容纳电芯单元142的电池仓143,电芯单元142的数目为多个。在本实施例中,电圆锯100的额定输入功率大于等于1.3KW 且小于等于1.7KW,进一步而言,该电圆锯100的额定输入功率为1.5KW,锯片12的直径大于等于0.15m且小于等于0.21m,更进一步而言,锯片12的直径为0.185m。因此,为了避免电圆锯100的尺寸过大、重量过重,同时需要满足电源装置中电池包14的容量的需求,还使得电池包14的标称电压与电圆锯100的重量的比值大于等于6V/Kg且小于等于12V/Kg,进一步而言,还使得电池包14的标称电压与电圆锯100的重量的比值大于等于7.5V/Kg且小于等于9V/Kg。这样,电池包14的标称电压能够被设置在一个合理的范围内,从而满足整机的额定工况的需求,依据该标称电压设置电池包14的额定容量,能够使得该额定容量在满足电池包14的放电时间满足用户的需求的情况下,能够尽可能的减小电圆锯100的整机的尺寸以及降低电圆锯100的重量。因此说,本发明中的电池包14的标称电压与电圆锯100的重量的比值是综合平衡电圆锯100的负载能力、工作时长、尺寸以及重量等的一个参数。
进一步而言,为了满足电圆锯100在额定工况的情况下的工作时长,还使得本发明中锯片12的直径与电源装置所包含的电芯单元142的节数的比值大于等于6mm/节且小于等于11mm/节,进一步而言,锯片12的直径与电源装置所包含的电芯单元142的节数的比值大于等于6mm/节且小于等于8.5mm/节,从而使得电圆锯100能够在满足工况的需求的情况下,电源装置的放电时间也能够满足用户的需求。更具体而言,在本实施例中,电池包14的数目为1,电池包14的标称电压被设定为48V,电芯单元142为锂离子电芯,在电芯单元142的额定电压为4V时,电池包14中至少要包括12节电芯单元142。而为了使得电池包14的额定容量满足放电时间的需求,还使得电池包14中的全部的电芯单元142构成了多个依次串联的电芯单元142组,每个电芯单元142组中包括两个上述的电芯单元142,也即是说,电池包14中的电芯单元142是每两个并联在一起构成一个电芯单元142组,多个电芯单元142组再依次串联,其中,电芯单元142组的数目为12,这样,使得电池包14在额定容量满足需求的情况下,电圆锯100的尺寸不会太大且重量也不会太重。
如图10所述,电池包14的其中两个电芯单元142之间还间隔有一个间隙144,这样,电池包壳体141能够在该间隙144处向内凹陷形成有凹槽141a。这样,当电池包14安装至结合部114时,结合部114能够位于凹槽141a内,凹槽141a的凹陷方向与底板平面151基本垂直,或者凹槽141a的凹陷方向与底板平 面151相交形成大于等于70度且小于等于90度的夹角,这样,当电圆锯100进行切割操作时,底板平面151与待切割件接触,电池包14不会接触到工件,从而不会影响整机的平衡性能,方便用户的操作,而且用户也能够比较顺畅的插拔电池包14。在电池包14结合至结合部114时,电池包14还关于对称平面107对称设置,这样,有利于使得电圆锯100的重心靠近主把手112的对称平面107,从而提高整机的平衡性能。当底板平面151与第一轴线101相互平行且底板平面151与第一轴线101之间的距离最近时,电池包14安装至结合部114的第二直线108方向还与底板平面151倾斜相交形成大于0度且小于等于20度的夹角,从而方便用户插拔电池包14。
在沿第一直线104方向上,电机13设置在电池包14和蜗轮蜗杆组件16之间,电池包14、电机13以及蜗轮蜗杆组件16基本沿第一直线104方向依次设置。电机轴线102位于对称平面107所在的平面内,电机13也关于对称平面107对称设置,从而使得电圆锯100的重心能够进一步的靠近对称平面107设置,进而提高电圆锯100的平衡性能。
为了给电机13进行散热,壳体11还形成有气流入口11a和气流出口11b,其中气流入口11a设置在容纳部111沿第一直线104方向靠近开口115的一端,气流入口11a朝向开口115敞开,因为电池包14设置在主把手112和容纳部111之间的结合部114处,因此,当产生从气流入口11a流入壳体11内部的散热气流时,该散热气流在壳体11外部也能够部分流经电池包14,从而对电池包14也具有一定的散热效果,气流入口11a还位于电池包14和电机13之间。气流出口11b设置在容纳部111上,且气流出口11b还位于电机13的靠近蜗轮蜗杆组件16的一端处,这样,散热气流从气流入口11a流向气流出口11b能够流经电机13,给电机13进行高效的散热。壳体11还形成有用于容纳蜗轮蜗杆的箱体116,箱体116相对容纳部111在垂直于电机轴线102的径向上凹陷,这样,从气流出口11b流出的散热气流能够流经箱体116的外侧,从而能够给位于箱体116内部的蜗轮蜗杆组件16进行散热。在本实施例中,箱体116和容纳部111是一体成型的,箱体116的内部和容纳部111的内部是相互连通的,这样,一部分的散热气流会从箱体116的内部流过然后从锯片12处流出,从而能够进一步的对蜗轮蜗杆组件16进行散热。
为了对电机13以及电池包14进行控制,电圆锯100还包括电路板17,电 路板17通过导线171与电机13构成电连接。电路板17位于容纳部111内,电路板17还设置在电机13和气流入口11a之间,从而散热气流能够依次流经电路板17和电机13,进而散热气流也能够给电路板17进行散热。在本实施例中,电路板17包括在垂直于电机轴线102的平面内延展的电路基板172,为了与容纳部111的形状相匹配,电路基板172基本为圆形,这样能够缩小电路板17在容纳部111内所占的空间,使得容纳部111内部的结构排布更为紧凑。
如图8和图11所述,电圆锯100还包括能进一步的对电路板17进行散热的散热板18。散热板18设置在容纳部111内,散热板18还被设置在气流入口11a和电机13之间。散热板18包括在垂直于电机轴线102的第二平面内延展的散热基板181,散热基板181的形状可以与电路基板172的形状基本相同,例如在本实施例中,散热基板181也呈圆形。散热板18还包括侧壁182,侧壁182沿圆形的散热基板181的边缘围绕散热基板181,侧壁182还在一个围绕电机轴线102的圆柱面内延展,这样,散热基板181和侧壁182围绕形成有用于安装电路板17的容纳空间。侧壁182上还形成有多个依次间隔设置的散热筋183,散热筋183沿平行于电机轴线102的方向延伸,相邻的两个散热筋183之间还形成有用于导向散热气流沿平行于电机轴线102的方向延伸的气流通道184,气流通道184也沿平行于电机轴线102的方向延伸。连接电路板17和电机13的导线171还可以被设置在相邻的两个散热筋183之间所形成的气流通道184内,导线171穿过气流通道184,这样一方面能够对导线171进行散热,另一方面还能够对导线171进行固定,再者还能够使得容纳部111内部的结构排布更为紧凑。
在本实施例中,壳体11的容纳部111和箱体116采用金属材料制成,这样可以使得壳体11的硬度满足要求。进一步而言,容纳部111和箱体116可以采用铝合金材料制成,从而可以降低壳体11的重量。电圆锯100还包括限位罩19,限位罩19围绕形成有限位空间191,限位罩19将导线171限制在限位空间191内以避免导线171接触容纳部111的壳壁,限位罩19采用绝缘材料制成。这样,导线171被限制在限位空间191内,从而导线171不会与容纳部111的壳壁接触,进而保证了电路板17与壳体11之间的爬电距离满足安规的需求,而且还保证了导线171与壳体11之间的爬电距离满足安规的需求。限位空间191朝向电机13敞开,限位空间191也朝向气流入口11a敞开,这样,散热气流能够流 经限位罩19所围绕形成的限位空间191的内部。
图12示出了第二实施例的电圆锯500的结构,在本实施例中,电圆锯500包括与第一实施例中结构相同的锯片52、电机和底板55,区别仅在于,电源装置包括一个结构以及摆放位置与第一实施例不同的电池包54,同时,电圆锯500也包括与该电池包54结构相匹配的壳体51。其中,电圆锯500可以与第一实施例具有相同的额定输入功率,电池包54可以与第一实施例具有相同的标称电压、相同个数的电芯单元、相同的额定容量,壳体51可以与第一实施例具有相同的主把手512、辅助把手513以及容纳部511。第一实施例与本实施例相适应的部分均可以应用到本实施例中。以下主要介绍本实施例与第一实施例的区别部分。
如图12至图14所示,在本实施例中,在沿电机轴线502方向上,电池包54设置在主把手512和电机之间。壳体51在主把手512和容纳部511之间凹陷形成有接收槽514,接收槽514向外敞开,电池包54能沿一直线方向可拆卸的结合至接收槽514。电池包54结合至接收槽514的方向与锯片52转动的第一轴线501相互垂直。在底板平面551与第一轴线501相互平行且底板平面551与第一轴线501之间距离最近时,电池包54结合至接收槽514的方向与底板平面551相交形成角度大于等于70度且小于等于90度的夹角。
在沿电机轴线502方向上,接收槽514设置在主把手512和电机之间,而我们知道对于本实施例中的标称电压为48V的电池包54而言,当电池包54被插装至接收槽514时,为了避免整个电圆锯500在沿电机轴线502方向上的尺寸过大,在本实施例中,还使得电池包54的电池包壳体541呈L形。具体而言,电池包壳体541包括:第一容纳部541a和第二容纳部541b,第一容纳部541a和第二容纳部541b相互垂直。电池包54中的电芯单元可以被分成两类,至少部分设置在第一容纳部541a内的第一类电芯单元和至少部分设置在第二容纳部541b内的第二类电芯单元。这样,当电池包54被插装至接收槽514时,第一容纳部541a位于接收槽514内,第二容纳部541b位于接收槽514外,且此时第一容纳部541a在沿电机轴线502方向上的尺寸小于第二容纳部541b在沿电机轴线502方向上的尺寸,从而能够缩小电圆锯500在沿电机轴线502方向上的尺寸,进而使得整个电圆锯500的整体布局更为紧凑,有利于电圆锯500的小型化。
图15示出了第三实施例的电圆锯600的结构,在本实施例中,电圆锯600包括与第一实施例中结构相同的锯片62、电机和底板65,区别仅在于,电源装置包括两个结构以及摆放位置与第一实施例不同的电池包,分别为第一电池包641和第二电池包642,同时,电圆锯600也包括与该第一电池包641和第二电池包642结构相匹配的壳体61。其中,电圆锯600可以与第一实施例具有相同的额定输入功率,第一电池包641可以与第一实施例具有相同的标称电压,第二电池包642也可以与第一实施例具有相同的标称电压,第一电池包641所包含的电芯单元的数目和第二电池包642所包含的电芯单元的数目之和与第一实施例中的电池包所包含的电芯单元的数目相同。第一电池包641和第二电池包642的额定容量之和与第一实施例中的电池包的额定容量相同。壳体61可以与第一实施例具有相同的主把手612、辅助把手613以及容纳部611。第一实施例与本实施例相适应的部分均可以应用到本实施例中。以下主要介绍本实施例与第一实施例的区别部分。
如图15至图17所示,在本实施例中,壳体61形成有分别用于结合第一电池包641和第二电池包642的第一结合部614a和第二结合部614b,在沿电机轴线方向上,第一结合部614a设置在第二结合部614b和电机之间,第一结合部614a还设置在主把手612和容纳部611之间。当第一电池包641结合至第一结合部614a时,第二电池包642结合至第二结合部614b时,在沿电机轴线方向上,第一电池包641设置在第二电池包642和电机之间。
具体而言,第一结合部614a为壳体61在主把手612和容纳部611之间凹陷形成有接收槽,接收槽向外敞开,第一电池包641沿第一方向600a插装至接收槽,该第一方向600a还与锯片62转动的第一轴线相互垂直。第二结合部614b连接了主把手612和容纳部611,主把手612也连接了第二结合部614b和第一结合部614a,从而主把手612、第一结合部614a和第二结合部614b共同围绕形成用于供用户握持主把手612的手通过的开口615。第二电池包642能沿第二方向600b可拆卸的结合至第二结合部614b,第二方向600b还与锯片62转动的第一轴线相互垂直。在本实施例中,当底板平面651与第一轴线相互平行且底板平面651与第一轴线之间距离最近时,第一方向600a与底板平面651相交形成大于等于70度且小于等于90度的夹角,第二方向600b与底板平面651相交形成大于等于0度且小于等于20度的夹角,且第一方向600a还与第二方向600b 相互垂直,从而方便用户插拔第一电池包641和第二电池包642。
以上显示和描述了本发明的基本原理、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发明,凡采用等同替换或等效变换的方式所获得的技术方案,均落在本发明的保护范围内。

Claims (23)

  1. 一种电圆锯,包括:
    锯片,能以第一轴线为轴转动;
    电机,包括用于驱动所述锯片转动的电机轴;
    壳体,形成有用于容纳所述电机的容纳部;
    底板,形成有用于与待切割件接触的底板平面;
    其特征在于:
    所述电圆锯还包括:
    蜗轮蜗杆组件,在所述电机和所述锯片之间实现动力的传递;
    电源装置,包括至少一个用于给所述电机提供能量来源的电池包;
    其中,一个所述电池包的标称电压与所述电圆锯的重量的比值大于等于6V/Kg且小于等于12V/Kg。
  2. 根据权利要求1所述的电圆锯,其特征在于:
    所述壳体还形成有:
    主把手,包括用于供用户一只手握持的第一握持部;
    辅助把手,包括用于供用户另一只手握持的第二握持部;
    其中,所述第一握持部关于一个对称平面对称设置,所述第二握持部沿与所述对称平面倾斜相交的方向延伸;
    所述第二握持部的延伸方向与所述对称平面倾斜相交形成角度大于等于50度且小于等于70度的夹角。
  3. 根据权利要求1所述的电圆锯,其特征在于:
    所述电源装置中包括多个电芯单元;所述锯片的直径与所述电源装置所包含的电芯单元的节数的比值大于等于6mm/节且小于等于11mm/节。
  4. 根据权利要求1所述的电圆锯,其特征在于:
    所述电池包的数目为1;
    所述电机轴相对所述壳体转动的轴线与所述第一轴线相互垂直,所述壳体还形成有用于供用户握持的主把手;在沿所述电机轴转动的轴线的方向上,所述电池包设置于所述主把手和所述电机之间。
  5. 根据权利要求4所述的电圆锯,其特征在于:
    所述壳体形成有向外敞开的接收槽;所述电池包沿一直线方向可拆卸的结合至所述接收槽;其中,所述电池包结合至所述接收槽的方向与所述第一轴线相互垂直;所述底板与所述壳体构成能以一个平行于所述第一轴线的第二轴线为轴的转动连接;在所述底板平面与所述第一轴线相互平行且所述底板平面与所述第一轴线之间距离最近时,所述电池包结合至所述接收槽的方向与所述底板平面相交形成角度大于等于70度且小于等于90度的夹角。
  6. 根据权利要求5所述的电圆锯,其特征在于:
    所述电池包包括呈L形的电池包壳体,所述电池包壳体包括相互垂直的第一容纳部和第二容纳部;
    所述电池包还包括:
    第一类电芯单元,至少部分设置在所述第一容纳部内;
    第二类电芯单元,至少部分设置在所述第二容纳部内;
    在所述电池包结合至所述壳体时,所述第一容纳部至少部分插入至所述接收槽内,所述第二容纳部位于所述接收槽外。
  7. 根据权利要求1所述的电圆锯,其特征在于:
    所述电池包的数目为2,分别为第一电池包和第二电池包;
    所述壳体形成有:
    第一结合部,可拆卸的结合所述第一电池包;
    第二结合部,可拆卸的结合所述第二电池包;
    在沿所述电机轴转动的轴线的方向上,所述第一结合部设置于所述电机和所述第二结合部之间。
  8. 根据权利要求7所述的电圆锯,其特征在于:
    所述第一电池包结合至所述第一结合部的方向与所述第二电池包结合至所述第二结合部的方向相互垂直。
  9. 根据权利要求1所述的电圆锯,其特征在于:
    所述壳体还形成有:
    主把手,包括用于供用户握持的第一握持部;
    结合部,可拆卸的结合所述电池包;
    所述主把手连接所述结合部和所述容纳部;所述底板平面在第一平面内延展;在所述底板平面与所述第一轴线相互平行时,所述电池包在所述第一平面内的投影位于所述底板在所述第一平面内的投影之外。
  10. 根据权利要求9所述的电圆锯,其特征在于:
    所述电池包包括:
    多个电芯单元;
    电池包壳体,围绕形成有用于容纳所述电芯单元的电池仓;
    所述电池包壳体形成有在所述电池包结合至所述壳体时供所述结合部嵌入的凹槽。
  11. 根据权利要求1所述的电圆锯,其特征在于:
    所述电池包的标称电压为48V。
  12. 根据权利要求11所述的电圆锯,其特征在于:
    所述电池包多个依次串联的电芯单元组,每个电芯单元组包括两个相互并联的电芯单元。
  13. 根据权利要求1所述的电圆锯,其特征在于:
    所述壳体还形成有:用于供用户握持的主把手;
    所述主把手关于一个对称平面对称设置,所述电机轴相对所述壳体转动的轴线位于所述对称平面内。
  14. 根据权利要求13所述的电圆锯,其特征在于:
    在所述电池包结合至所述壳体时,所述电池包也关于所述对称平面对称设置。
  15. 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:
    电路板,设置在所述容纳部内;
    所述电路板与所述电机构成电连接;
    所述壳体形成有气流入口和气流出口,从所述气流入口流入所述壳体且从所述气流出口流出所述壳体的散热气流依次流经所述电路板和所述电机。
  16. 根据权利要求15所述的电圆锯,其特征在于:
    所述电路板包括电路基板,所述电路基板在一个垂直于所述电机轴相对所述壳体转动的轴线的平面内延展。
  17. 根据权利要求16所述的电圆锯,其特征在于:
    所述电圆锯还包括:
    散热板,与所述电路板连接;
    所述散热板包括:
    散热基板,在第二平面内延展;
    所述第二平面与所述电机轴相对所述壳体转动的轴线相互垂直。
  18. 根据权利要求17所述的电圆锯,其特征在于:
    所述散热板还包括:
    侧壁,在所述散热基板的边缘处围绕所述散热基板;
    散热筋,形成于所述侧壁;
    所述散热筋沿与所述电机轴相对所述壳体转动的轴线平行的方向延伸。
  19. 根据权利要求17所述的电圆锯,其特征在于:
    所述散热板还包括:
    侧壁,在所述散热基板的边缘处围绕所述散热基板;
    多个散热筋,形成于所述侧壁;
    相邻的两个所述散热筋之间还形成有用于导向气流流动的气流通道;
    所述电圆锯还包括用于连接所述的电路板和所述电机的导线;所述导线穿过位于两个所述散热筋之间的气流通道。
  20. 根据权利要求1所述的电圆锯,其特征在于:
    所述容纳部采用金属材料制成。
  21. 根据权利要求20所述的电圆锯,其特征在于:
    所述电圆锯还包括:
    电路板,设置在所述容纳部内;
    导线,连接所述电路板和所述电机;
    限位罩,围绕形成有部分敞开的限位空间;
    所述限位罩将所述导线限制在所述限位空间内以避免所述导线接触所述容纳部。
  22. 根据权利要求1至21任意一项所述的电圆锯,其特征在于:
    所述电机轴相对所述壳体转动的轴线与所述第一轴线相互垂直。
  23. 一种电圆锯,包括:
    锯片,能以第一轴线为轴转动;
    电机,包括用于驱动所述锯片转动的电机轴;
    壳体,形成有用于容纳所述电机的容纳部;
    底板,形成有用于与待切割件接触的底板平面;
    其特征在于:
    所述电圆锯还包括:
    蜗轮蜗杆组件,在所述电机和所述锯片之间实现动力的传递;
    所述电机轴相对所述壳体转动的轴线与所述第一轴线相互垂直;所述壳体还包括:用于将至少一个电池包结合至所述壳体的结合部和用于供用户握持的主把手;所述结合部连接所述主把手和所述容纳部。
PCT/CN2018/080079 2018-03-09 2018-03-22 电圆锯 Ceased WO2019169673A1 (zh)

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