WO2021115207A1 - 手持式工具机及其系统 - Google Patents

手持式工具机及其系统 Download PDF

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Publication number
WO2021115207A1
WO2021115207A1 PCT/CN2020/133890 CN2020133890W WO2021115207A1 WO 2021115207 A1 WO2021115207 A1 WO 2021115207A1 CN 2020133890 W CN2020133890 W CN 2020133890W WO 2021115207 A1 WO2021115207 A1 WO 2021115207A1
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WO
WIPO (PCT)
Prior art keywords
hand
motor
machine tool
held
power
Prior art date
Application number
PCT/CN2020/133890
Other languages
English (en)
French (fr)
Inventor
张伟
梁冰
庞晓丽
Original Assignee
苏州宝时得电动工具有限公司
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Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2021115207A1 publication Critical patent/WO2021115207A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION 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
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
    • B23B45/02—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION 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
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the invention relates to a hand-held machine tool.
  • the invention also relates to a system including the above-mentioned hand-held machine tool.
  • Existing hand-held machine tools generally use brush motors as power components.
  • the power of the motor is positively related to its structural size, especially its radial size.
  • the energy density of the brushed motor is low.
  • the motor Under the premise of ensuring a certain working capacity, the motor itself has a large structural size, which further makes the overall structural size of the handheld machine tool large and increases the user's holding burden.
  • the diameter of the brushed motor is as high as 38mm, so that the diameter of the handle portion for the user to hold is as high as 52mm.
  • the existing hand-held power tool generally has a built-in power supply device or is detachably connected to the power supply device, and the user needs to bear the weight of the power supply device when working with the hand-held power tool.
  • the technical problem to be solved by the present invention is to provide a hand-held machine tool, which has the advantages of more ergonomics and user-friendliness under the premise of ensuring a certain working ability.
  • a hand-held machine tool including: a housing, including a handle portion for the user to hold; a motor, housed in the housing and having a motor shaft; an output shaft, which is composed of the motor shaft Drive, used to connect the working head; the rated power of the motor is between 60W-200W, and the ratio of the rated power of the motor to the diameter of the handle is between 1.6W/mm-7.2W/mm .
  • the motor is an external rotor brushless motor, and the diameter of the brushless motor is between 18mm-25mm.
  • the handle portion has a centerline, and the length of the hand-held power tool along the centerline direction is between 160mm and 200mm.
  • the hand-held machine tool further includes an interface, and the interface is used to connect an external DC power supply through a cable.
  • the working speed of the output shaft is between 5000 rpm and 35000 rpm.
  • the handle portion has a centerline
  • the housing is formed by clamping a pair of left and right half-shells distributed along the centerline.
  • the hand-held power tool is configured as a straight grinding;
  • the housing includes a first barrel portion and a second barrel portion, the first barrel portion accommodates the output shaft, and the first barrel portion
  • Two cylinder parts form the handle part; the minimum outer diameter of the first cylinder part is between 19 mm and 27 mm; the maximum outer diameter of the second cylinder part is between 28 mm and 37 mm.
  • the rated power of the motor is between 60W and 120W, and the ratio of the rated power of the motor to the diameter of the handle is between 1.6W/cm and 4.3W/cm.
  • the rated power of the motor is between 60-120w, and the ratio of the rated power of the motor to the weight of the hand-held machine tool is between 0.4W/g-1W/g .
  • the handle portion has a centerline, and the length of the hand-held power tool along the centerline direction is between 170 cm and 200 cm.
  • the housing includes a first cylindrical portion and a second cylindrical portion; wherein, the first cylindrical portion houses the output shaft, and the second cylindrical portion forms the handle portion;
  • the minimum outer diameter of the first cylinder part is between 19mm and 27mm, and the maximum outer diameter of the second cylinder is between 28mm and 37mm.
  • the housing extends in the longitudinal direction and has a first end and a second end; the output shaft at least partially extends from the first end to be fitted with a working head;
  • the center of gravity of the power tool is arranged close to the first end and is located between 1/4 of the length of the hand-held power tool and 1/2 of the length of the hand-held power tool.
  • the motor is arranged close to the first end and is located between the first end and 1/2 of the length of the hand-held power tool. In one of the embodiments, the working speed of the output shaft is between 5000 rpm and 35000 rpm.
  • the hand-held power tool is configured as an angle grinder
  • the housing further includes a head shell part arranged at an angle to the handle part, and the head shell part accommodates the motor.
  • the rated power of the motor is between 80 W and 200 W, and the ratio of the rated power of the motor to the diameter of the handle is between 2.1 W/cm and 7.2 W/cm.
  • the rated power of the motor is between 80W-200W, and the ratio of the rated power of the motor to the weight of the hand-held machine tool is between 0.35W/g-1.1W/g between.
  • an end of the handle part away from the head shell part is provided with an interface, and the interface is connected to an external DC power supply through a cable.
  • the handle portion has a centerline, and the length of the hand-held power tool in the direction along the centerline is between 172.3 mm and 192.3 mm.
  • the ratio of the diameter of the head shell portion to the diameter of the handle portion is between 0.9 and 1.1.
  • the handle portion has a center line
  • the output shaft has an end surface mated with the working head, and in a direction along the motor shaft, the center line is connected to the output shaft
  • the distance H1 of the end face of the slab is between 29.7mm-44.7mm.
  • the head shell portion has a top surface
  • the output shaft has an end surface mated with the working head; the distance H2 between the top surface and the end surface is between 39.2-69.2 mm .
  • the working speed of the output shaft is between 14000 rpm and 24000 rpm.
  • the handle portion is further provided with a switch element for controlling the operation of the motor.
  • the hand-held machine tool of the present invention uses an external rotor brushless motor as the drive source, the motor power is between 60W-200W, and the working capacity is strong; and the ratio of the rated power to the diameter of the handle is set at Within a reasonable range, a more ergonomic design that is conducive to the user's grip is obtained.
  • a hand-held machine tool including: a housing, including a handle portion for the user to hold; a motor, housed in the housing and having a motor shaft; an output shaft, The motor shaft drive is used to connect the working head; the interface is used to connect to an external DC power supply through a cable; the rated power of the motor is between 60W-200W, and the rated power of the motor is equal to that of the handheld
  • the weight ratio of the type machine tool is between 0.29W/g-1.6W/g.
  • the hand-held machine tool of the present invention uses an external rotor brushless motor as the driving source, the motor power is between 60W-200W, and the working capacity is strong; and the power supply device is external, and the ratio of the rated power to the weight of the whole machine is It is set in a reasonable range, thereby obtaining a design that is less burdensome for users to hold and is more ergonomic.
  • the present invention provides a handheld power tool system, including: a handheld power tool; an adapter, including an installation part for connecting an external DC power supply; the adapter is connected to the handheld power tool through a cable Connecting and transmitting the power of the external DC power supply to the hand-held power tool.
  • an operating unit is provided on the adapter, and the operating unit is used to adjust the working speed of the motor.
  • the external DC power source is a universal battery pack for electric tools, and the rated voltage of the battery pack is 20V.
  • the hand-held machine tool system of the present invention reduces the user's holding burden by externally placing the power supply device; and uses an outer rotor brushless motor as the driving source of the hand-held machine tool.
  • the power is between 60W-200W, and the working ability is strong.
  • the ratio of the rated power of the motor to the diameter of the handle is set in a reasonable range, which is more convenient for users to hold and has a high user-friendliness.
  • FIG. 1 is a schematic diagram of the structure of the handheld power tool system according to the first embodiment of the present invention
  • Figure 2 is a cross-sectional view of the hand-held power tool in the hand-held power tool system shown in Figure 1;
  • Fig. 3 is a schematic diagram of a locking unit in the hand-held machine tool shown in Fig. 2;
  • Fig. 4 is a schematic diagram of a locking member in the hand-held machine tool shown in Fig. 2;
  • FIG. 5 is a schematic diagram of the size of the handheld machine tool shown in FIG. 2;
  • Figure 6 is an exploded view of the hand-held machine tool shown in Figure 2, in which components inside the housing are omitted;
  • FIG. 7 is a schematic structural diagram of a handheld power tool system according to a second embodiment of the present invention.
  • Fig. 8 is a partial cross-sectional view of the hand-held machine tool system shown in Fig. 7 involving the hand-held machine tool, which shows the flow direction of the cooling air flow;
  • FIG. 9 is a schematic diagram of the structure of the handheld power tool in the handheld power tool system shown in FIG. 7;
  • FIG. 10 is a schematic diagram of the size of the handheld machine tool shown in FIG. 9;
  • Figure 11 is an exploded view of the hand-held machine tool shown in Figure 9, in which components inside the housing are omitted;
  • Figure 12 is a cross-sectional view of the hand-held machine tool shown in Figure 2 involving the spindle lock;
  • FIG. 13 is a cross-sectional view of the positioning of the outer rotor brushless motor in the first and second embodiments of the present invention.
  • connection should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be a connection between two components, which can be directly connected or indirectly connected through an intermediary.
  • connection should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be a connection between two components, which can be directly connected or indirectly connected through an intermediary.
  • connection should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be a connection between two components, which can be directly connected or indirectly connected through an intermediary.
  • connection can be a mechanical connection or an electrical connection, or it can be a connection between two components, which can be directly connected or indirectly connected through an intermediary.
  • FIGS. 1 to 6 are the handheld machine tool 100 and its system provided by the first embodiment of the present invention.
  • the hand-held power tool 100 is configured as a straight grinding.
  • the handheld power tool system includes a straight grinder 100 and an adapter 16, wherein the adapter 16 is provided with a mounting part for connecting an external DC power source 49.
  • the adapter 16 is connected to the external DC power source 49 and connected to the straight mill 100 through the cable 47, the power of the external DC power source 49 is transmitted to the straight mill 100 through the adapter 16 for its operation.
  • the external DC power source 49 is configured as a universal battery pack for electric tools.
  • the hand-held power tool 100 includes a housing 10.
  • the housing 10 extends in the longitudinal direction, and has a first end and a second end in the extending direction thereof. Wherein, the second end is provided with an interface 11 for connecting the cable 47.
  • At least part of the side wall of the housing 10 forms a handle portion for the user to hold.
  • the housing 10 contains a motor.
  • the motor is an external rotor brushless motor, and includes a stator 12, a rotor 21, and a motor shaft 23 connected to the rotor 21.
  • one of the housing 10 and the stator 12 is provided with a first groove, and the other is provided with a first protrusion for matching with the first groove.
  • the housing 10 and the stator 12 are fixed, so that the motor shaft 23 can rotate with the rotor 21 relative to the stator 12 in unison.
  • stator 12 and the housing 10 can also be relatively fixed by other types of cooperation, which is not limited in this application.
  • a plurality of first protrusions 35 are provided on the inner wall of the housing 10 at intervals along the circumferential direction.
  • a plurality of first grooves 31 are correspondingly provided on the outer wall of the stator 12.
  • the plurality of first grooves 31 and the plurality of first protrusions 35 cooperate with each other, so that the two remain relatively static.
  • the rotor 21 is fixedly connected to the motor shaft 23.
  • the fixed connection may be screw connection, bolt connection, welding, integral molding, and the like. Therefore, the motor shaft 23 can rotate together with the rotor 21.
  • the output shaft 25 is also housed in the housing 10.
  • the output shaft 25 at least partially protrudes from the aforementioned first end for mating with a working head.
  • the output shaft 25 is connected to the motor shaft 23 without relative rotation, and is directly driven by the motor shaft 23. That is, there is no structure such as gear transmission and reduction box between the motor shaft 23 and the output shaft 25, so that the overall size of the hand-held machine tool 100 is smaller and the weight is lighter, which is convenient for the operator to carry and use.
  • the output shaft 25 is supported in the metal sleeve 13 through a bearing, and the metal sleeve 13 is supported in the housing 10. Due to the higher structural strength of the metal sleeve 13, the metal sleeve 13 can provide better support for the output shaft 25.
  • the brushless motor has a higher energy density than the brush motor
  • the diameter of the brushless motor is smaller, the length is shorter, and the anti-blocking ability is stronger under the same power condition; thus, the brushless motor is used
  • the hand-held machine tool 100 as a driving source has a smaller volume and is more convenient to carry and store.
  • the rated power of the brushless motor is between 60W and 120W, and the diameter of the motor is between 18mm and 25mm.
  • the diameter of the brushed motor can reach about 38mm.
  • the outer rotor brushless motor has a diameter of 23 mm and an axial dimension of 10 mm.
  • the rated power of the outer rotor brushless motor is 100W.
  • the rotation speed of the output shaft 25 is between 5000 rpm and 35000 rpm.
  • the housing 10 extends in the longitudinal direction and includes a first cylindrical portion 79 and a second cylindrical portion 81; wherein, the first cylindrical portion 79 accommodates the output shaft 25, and the second cylindrical portion 81 forms the aforementioned Handle part.
  • the first barrel 79 also includes a detail 14 for grasping by fingers.
  • the detail 14 is held by the fingers, and the handle is held by the mouth of the tiger.
  • the portion of the handle portion supported by the tiger's mouth is defined as the tiger's mouth 15.
  • the radial dimension of the first cylindrical portion 79 gradually decreases from left to right and then gradually increases, and the second cylindrical portion 81 has a cylindrical shape as a whole.
  • the detailed portion 14 has the smallest outer diameter D1 of the first cylindrical portion 79, and the smallest outer diameter D1 has a size range between 19 mm and 27 mm.
  • the smallest outer diameter D1 of the detailed portion 14 is 22 mm.
  • the handle portion has a center line X1.
  • the length L1 of the hand-held power tool 100 along the direction of the center line X1 is between 160 mm and 200 mm.
  • the length L1 of the hand-held power tool 100 in the direction of the handle center line X1 is 187 mm.
  • the center of gravity of the handheld power tool 100 is arranged close to the first end, and is located between 1/4 of the entire length of the handheld power tool 100 and 1/2 of the entire length of the handheld power tool 100. That is, when the user holds the hand-held power tool with one hand while holding the pen, the center of gravity of the hand-held power tool 100 is located between the mouth 15 and the detail 14.
  • the center of gravity of the hand-held power tool 100 is located on the side of the tiger's mouth 15 facing the detail 14.
  • the center of gravity of the hand-held power tool 100 is approximately located on the left side of the mouth 15.
  • the motor is arranged close to the first end and is located between the first end and 1/2 of the length of the hand-held power tool 100. That is, when the hand-held power tool 100 is equally divided into two sections along its longitudinal extension direction, the motor is completely located in the section close to the output shaft 25.
  • the extension directions of the motor shaft 23, the output shaft 25 and the handle portion are the same, so that vibration and noise caused by different shafts can be reduced.
  • the output shaft 25 is connected to the motor shaft 23 without relative rotation through a plastic coupling 19.
  • the other end of the output shaft 25 is provided with a locking unit for mating with a working head 39.
  • the locking unit includes a locking sleeve 33 and a locking member 37.
  • the locking member 37 is sleeved in the locking sleeve 33, and a through channel for the working head 39 is provided in the locking member 37; the locking sleeve 33 is connected with the output shaft 25; so that the locking member 37 can abut Between the output shaft 25 and the locking sleeve 33, the locking member 37 restricts the movement of the working head 39.
  • one end of the locking sleeve 33 is connected to the output shaft 25.
  • the right end of the locking sleeve 33 is connected to the output shaft 25.
  • the connection method can be screw connection, bolt connection and so on.
  • the inner wall of the other end of the locking sleeve 33 is provided with a first inclined surface 65.
  • a second inclined surface 67 is provided on the end surface of the output shaft 25.
  • the first inclined surface 65 and the second inclined surface 67 are relatively inclined.
  • a locking space is formed between the first inclined surface 65 and the second inclined surface 67. As shown in FIG.
  • the outer wall of the locking member 37 is provided with a third inclined surface 69 and a fourth inclined surface 71 which are matched with the first inclined surface 65 and the second inclined surface 67 at intervals along the axial direction. Therefore, when the locking sleeve 33 moves toward the output shaft 25, the locking member 37 can be abutted between the output shaft 25 and the locking sleeve 33.
  • the outer wall of the locking member 37 is provided with a plurality of slits 73 extending from the third inclined surface 69 to the fourth inclined surface 71 along the circumferential direction; therefore, when the locking sleeve 33 is tightened, the first inclined surface 65 continuously acts on the locking member On the third inclined surface 69 of 37, the width of the slot 73 is compressed, thereby holding the working head 39 tightly. That is, under the action of the first inclined surface 65, the second inclined surface 67, the third inclined surface 69, and the fourth inclined surface 71, when the working head 39 penetrates through the through channel, the side of the locking member 37 close to the slot 73 faces the working head 39 shrinks, thus restricting the working head 39 from moving in the axial direction.
  • the hand-held machine tool 100 further includes: a fan 27 arranged in the housing 10.
  • the fan 27 is used to dissipate heat of the outer rotor brushless motor.
  • a fan insert 24 is fixedly provided on the motor shaft 23.
  • the fixing method can be screw fixation, bolt fixation, welding fixation, integral molding fixation, and the like.
  • the fan 27 is fixed on the fan insert 24.
  • the fan insert 24 is provided with a spindle lock.
  • the spindle lock includes a locking pin 63 and an operating button 57 for the user to operate.
  • the locking pin 63 can abut against the fan insert 24 under the action of the operating button 57, thereby restricting the rotation of the motor shaft 23 and finally the rotation of the output shaft 25, so that the working head 39 can be installed or disassembled.
  • the locking pin 63 acting on the fan insert 24 can avoid damage to the output shaft 25 compared to acting on the output shaft 25.
  • annular spring 59 is provided in the housing 10.
  • the ring spring 59 is connected to the operating button 57 to provide a force that urges the operating button 57 to move away from the fan insert 24.
  • a third groove 61 is provided on the inner end of the operating button 57. One end of the locking pin 63 passes through the third groove 61, and the other end is in contact with the fan insert 24.
  • the housing 10 is provided with an air outlet 53 close to the fan 27 and an air inlet 55 far away from the fan 27.
  • the air inlet 55 is provided on the second cylindrical portion 81.
  • the housing 10 adopts a screwless design.
  • the housing 10 is formed by clamping a pair of left and right half-shells distributed along the center line X1.
  • the left and right half-shells are a first half 75 and a second half 77 respectively.
  • the appearance of the first half 75 and the second half 77 adopts a screwless design.
  • the first half 75 and the second half 77 can be fixedly connected by buckles and pins.
  • one of the first half 75 and the second half 77 is provided with a clamping groove 85 and the other is provided with a clamping protrusion 87.
  • the ratio of the rated power of the hand-held power tool 100 to the diameter of the handle portion is optimally selected. It is conceivable that if the ratio of the rated power of the hand-held power tool 100 to the diameter of the handle portion is too small, it means that the handle portion is thick and inconvenient to hold. The consequence is that the operator fatigues quickly.
  • the optimal ratio of the rated power of the hand-held power tool 100 to the diameter of the handle part also depends on the power range within which the hand-held power tool 100 is arranged. In this embodiment, the rated power of the handheld machine tool 100 is between 60W and 120W, and the ratio of the rated power to the diameter of the handle is between 1.6W/mm and 4.3W/mm.
  • Another ergonomic design solution of the hand-held power tool 100 can be implemented in the following manner: the ratio of the rated power of the hand-held power tool 100 to the weight of the whole machine is optimally selected.
  • the weight of the hand-held machine tool 100 is generated from the total weight of all components of the hand-held machine tool 100.
  • the weight of the cable 47 and the battery pack 49 is not taken into consideration, and the working head, protective cover and possible installation are not taken into consideration.
  • the weight of the other accessories if they exist. It is conceivable that if the ratio of the rated power of the hand-held machine tool 100 to the weight of the whole machine is too small, it means that the hand-held machine tool 100 is heavier in the hands of the user. The consequence is that the operator fatigues quickly.
  • the optimal ratio of the rated power of the hand-held power tool 100 to the weight of the whole machine also depends on the power range within which the hand-held power tool 100 is arranged.
  • the rated power of the handheld machine tool 100 is between 60W and 120W
  • the ratio of the rated power to the weight of the whole machine is between 0.4W/g and 1W/g.
  • the size of the housing 10 can be made as small as possible without sacrificing the power of the hand-held machine tool 100; and, in order to be more convenient for the user to hold, The diameter of the handle is set within a reasonable range.
  • the diameter D2 of the handle is between 28-37 mm.
  • the diameter D2 of the handle part is between 31-33 mm.
  • the overall weight of the hand-held machine tool 100 is between 125 g and 145 g.
  • the direct grinding in the embodiment of the present application on the one hand, through the selection of the outer rotor brushless motor, without sacrificing the working ability of the direct grinding itself, the structural size of the motor is greatly reduced, so that the radial size of the handle is increased. It is convenient for users to hold and enhances the user's holding experience; on the other hand, through the external power supply device and the selection of the external rotor brushless motor, the machine tool is greatly reduced without sacrificing the working ability of the straight grinding itself.
  • the weight of 100 reduces the user's holding burden.
  • Figures 7 to 11 show a hand-held machine tool 100' and its system provided by the second embodiment of the present invention.
  • the hand-held power tool 100' is configured as an angle grinder.
  • Fig. 7 shows a schematic diagram of the connection between the angle grinder 100' and the adapter 16 according to the embodiment of the present application.
  • Fig. 8 shows a partial structural diagram of the angle grinder 100' according to the embodiment of the present application.
  • the hand-held power tool 100' includes a housing 10'.
  • the housing 10' includes a head shell portion 41 and a handle portion 43. Wherein, the end of the handle portion 43 away from the head shell portion 41 is provided with an interface for connecting the cable 47, and the hand-held power tool 100' is connected to the adapter 16 through the interface 11'.
  • the head shell portion 41 and the handle portion 43 are arranged at an angle, and a motor is accommodated therein. Specifically, the head shell portion 41 is arranged in a vertical direction, and the included angle between the head shell portion 41 and the handle portion 43 is between 90 degrees and 110 degrees. That is, the handle portion 43 is designed to be vertical or upwardly warped with respect to the horizontal direction.
  • the head shell portion 41 and the handle portion 43 are arranged perpendicularly; and the head shell portion 41 and the handle portion 43 are T-shaped.
  • the handle portion 43 has a center line X1'.
  • the length L1' of the hand-held power tool 100' in the direction of the center line X1' is between 172.3 mm and 192.3 mm.
  • the length L1' of the hand-held power tool 100' in the direction of the center line X1' is 182.3 mm.
  • the motor is an external rotor brushless motor, which includes a stator 12', a rotor 21', and a motor shaft 23' connected to the rotor 21'.
  • one of the housing 10' and the stator 12' is provided with a first groove, and the other is provided with a first protrusion for mating with the first groove.
  • the housing 10' and the stator 12' are fixed, so that the motor shaft 23 can rotate relative to the stator 12 along with the rotor 21'.
  • stator 12' and the housing 10' cooperate with each other is the same as that of the first embodiment, and will not be repeated here.
  • the output shaft 25' is connected to the motor shaft 23' without relative rotation, and is directly driven by the motor shaft 23'. That is, there is no structure such as gear transmission and reduction box between the motor shaft 23' and the output shaft 25', so the overall size of the machine tool 100' is smaller and the weight is lighter, which is convenient for the operator to carry and use.
  • the axis of the motor shaft 23' and the axis of the output shaft 25' are arranged substantially coincident. That is, the motor shaft 23' and the output shaft 25' are coaxially arranged, so that vibration and noise caused by different shafts can be reduced.
  • the output shaft 25' is coaxially arranged with the head housing 41, so that the whole machine is more concentrated.
  • the output shaft 25' is located on the side of the motor shaft 23' away from the handle portion 43, and at least partially extends out of the head shell portion 43 to be fitted with a working head 39'. As shown in Fig. 8, the upper end of the output shaft 25' is connected to the lower end of the motor shaft 23'.
  • one end of the output shaft 25 has an internal thread.
  • the working head 39' can be directly fastened to the output shaft 25' by a fastening screw 26 mated with the internal thread, so that the working head 39' can be easily disassembled.
  • a pressing plate 83 is provided on the side of the working head 39' facing away from the output shaft 25'.
  • the pressing plate 83 is provided with a through hole for the fastening screw 26 to pass through.
  • the fastening screw 26 is connected with the internal thread in the output shaft 25' through the through hole.
  • the working head 39' is located between the pressing plate 83 and the output shaft 25'.
  • the brushless motor has a higher energy density than the brush motor, under the same power condition, the brushless motor has a smaller diameter, shorter length, and stronger anti-blocking ability; and then use this motor to replace the The hand-held machine tool 100' with a brush motor can reduce the size of the whole machine and is more convenient to carry and store.
  • the rated power of the brushless motor is between 80W and 200W
  • the diameter of the motor is between 18mm and 25mm
  • the axial dimension is 24mm.
  • the housing 10' includes a head shell part 41 and a handle part 43 designed at an angle to the head shell part 41; while the outer rotor brushless motor is located in the head shell part 41. .
  • Another indicator for reflecting the compactness of the hand-held power tool 100' and the efficacy of the motor is the ratio of the diameter D1' of the head shell portion 41 to the diameter D2' of the handle portion 43.
  • the ratio of the diameter of the head shell portion 41 to the diameter of the handle portion 43 is between 0.9 and 1.1, in particular, an ergonomic hand-held power tool 100' is obtained.
  • the diameter D1' of the head shell portion 41 is between 29 mm and 37 mm.
  • the design for the operation of the hand-held machine tool 100' is realized by the following way: the ratio of the rated power of the hand-held machine tool 100' to the diameter of the handle part 43 is optimally selected . It is conceivable that if the ratio of the rated power of the hand-held power tool 100' to the diameter of the handle portion 43 is too small, it means that the handle portion 43 is thick and inconvenient to hold. The consequence is that the operator fatigues quickly.
  • the optimal ratio of the rated power of the hand-held power tool 100' to the diameter of the handle portion 43 also depends on the power range within which the hand-held power tool 100' is arranged. In this embodiment, the rated power of the handheld machine tool 100' is between 80W and 200W, and the ratio of the rated power to the diameter of the handle 43 is between 2.1W/mm and 7.2W/mm.
  • the diameter D2' of the handle portion 43 is between 28 mm and 37 mm. Particularly preferably, the diameter D2' of the handle portion 43 is between 31 mm and 33 mm.
  • the radial dimension of the handle portion 43 can also be limited by the circumference of the handle portion 43.
  • the circumference of the handle portion 43 is between 85 mm and 120 mm, particularly preferably 100 mm.
  • Another ergonomic design solution of the hand-held power tool 100' can be realized in the following manner: the ratio of the rated power of the hand-held power tool 100' to the weight of the whole machine is optimally selected.
  • the weight of the hand-held machine tool 100' is generated from the total weight of all components of the hand-held machine tool 100', without considering the weight of the cable 47' and the battery pack 49', and without considering the working head, The weight of the protective cover and other accessories that may be installed, if they are present. If the ratio of the rated power of the hand-held machine tool 100' to the weight of the whole machine is too large, it means that the hand-held machine tool 100' is heavier in the user's hand. The consequence is that the operator fatigues quickly.
  • the optimal ratio of the rated power of the hand-held power tool 100' to the weight of the whole machine also depends on the power range within which the hand-held power tool 100' is arranged.
  • the rated power of the handheld machine tool 100' is between 80W and 200W
  • the ratio of the rated power to the weight of the whole machine is between 0.35W/g and 1.1W/g.
  • the weight of the hand-held machine tool 100' is between 185g-205g.
  • the rotation speed of the output shaft 25' ranges from 14000 rpm to 24000 rpm.
  • the working head 39' is annular
  • the diameter range of the working head 39' is between 36mm-55mm.
  • the working head 39' may include a disc-shaped cutting blade or a sanding piece.
  • the disc-shaped cutting blade or sanding piece is vertically installed on the output shaft 25'.
  • the hand-held power tool 100' has a shield 51 detachably connected to the housing 10'.
  • the shield 51 is used for accommodating at least a part of the working head 39' to prevent working debris from splashing near the operator during the working process of the machine tool 100'.
  • the distance H1 between the center line X1' of the handle portion 43 and the end surface of the output shaft 25' for mating with the working head 39' should be arranged within a reasonable range.
  • the distance H1 between the center line X1' of the handle portion 43 and the end surface of the output shaft 25' for mating with the working head 39' is between 29.7 mm and 44.72 mm.
  • the distance H1 between the center line X1' and the end surface of the output shaft 25' for mating with the working head 39' is 44.72 mm.
  • the hand-held power tool 100' is a straight shank type.
  • the size of the head shell 41 in the vertical direction should also be arranged within a reasonable range.
  • the distance H2 between the top surface of the head housing portion 41 and the end surface of the output shaft 25' is between 39.2 mm and 69.2 mm.
  • the distance H2 between the top surface of the head shell portion 41 and the end surface of the output shaft 25' is 69.2 mm.
  • the distance H3 between the top surface of the head shell portion 41 in the axial direction of the output shaft 25' and the end surface of the shield 51 is between 38 mm and 80 mm. Particularly preferably, H3 is 78.5 mm.
  • the hand-held machine tool 100' further includes: a circuit board (not shown) provided in the handle portion 43 for controlling the operation of the brushless motor.
  • the hand-held power tool 100' of this embodiment is further provided with a heat dissipation unit.
  • the heat dissipation unit at least includes: a fan 27' fixedly arranged on the output shaft 25'; an air inlet 55' opened on the handle part 43 and an air outlet 53' opened on the head shell part .
  • the distance between the top surface of the brushless motor and the inner wall of the topmost end of the handle portion 43 is between 2 mm and 5 mm.
  • the head shell part may also be arranged obliquely to the handle part; the handle part is provided with an air inlet, and the head shell part is provided with an air outlet.
  • the fan rotates, the heat dissipation airflow flows through the circuit board and the motor in sequence to dissipate heat for both.
  • a certain space must be reserved between the inner wall of the handle and the motor for the heat dissipation airflow to pass; that is, the extension plane of the inner wall of the topmost end of the handle does not intersect the motor.
  • the handle portion 43 is also provided with a switch element 17 for controlling the starting or closing of the outer rotor brushless motor.
  • the housing 10' includes a pair of left and right half-shells distributed along the center line X1' of the handle portion, which are clamped together.
  • the left and right half-shells are respectively a first half 75' and a second half 77'.
  • the appearance of the first half 75' and the second half 77' adopts a screwless design.
  • the first half 75' and the second half 77' can be fixedly connected by buckles and pins.
  • one of the first half 75' and the second half 77' is provided with a clamping groove, and the other is provided with a clamping protrusion.
  • the head shell portion 41 may be connected by screws.
  • the angle grinder 100' of the present application on the one hand, through the external power supply device and the selection of the external rotor brushless motor, without sacrificing the working ability of the angle grinder 100', the weight of the machine tool 100' is greatly reduced, and the weight is reduced.
  • the structure size of the motor is greatly reduced without sacrificing the working ability of the angle grinder 100', so that the radial direction of the handle 43 The size is more convenient for users to hold and enhance the user's holding experience.
  • this is the hand-held machine tool and its system described in this application.
  • the hand-held power tool is connected to the adapter 16 through a cable 47 and receives power from an external DC power source 49 transmitted from the adapter 16.
  • the adapter 16 is provided with a mounting part for connecting an external DC power source 49. That is, the hand-held machine tool of the present application reduces the weight of the whole machine through the external technical means of the power supply device, thereby reducing the user's holding burden.
  • the hand-held machine tool described in the present application includes: a housing, at least part of the side walls of the housing form a handle portion, the handle portion has a radial dimension of 28mm to 37mm; an outer rotor brushless motor with a rated power of 60 to Between 200W; output shaft, which has no relative rotation connection with the motor shaft and is directly driven by the motor shaft, and the output shaft is used for mating with the working head.
  • the hand-held machine tool described in this application uses an external rotor brushless motor with a rated power of 60 to 200 W as a power component. Under the same power condition, the motor has a smaller diameter, shorter length, and stronger anti-blocking ability than a brushed motor. Furthermore, using the motor to replace the hand-held power tool with a brush motor can reduce the volume of the whole machine, so that the size of the handle part can also be reduced, and it is more convenient to carry and store.
  • the ratio of the rated power to the diameter of the handle part of the hand-held machine tool of the present application is between 1.6W/mm-7.2W/mm, thereby obtaining an ergonomic and strong workability design .
  • Another ergonomic configuration of the hand-held power tool is defined by the ratio of the rated power of the hand-held power tool to the weight of the whole machine, thereby obtaining a design that not only guarantees the working ability but also facilitates the user's holding.
  • the ratio of the rated power of the hand-held tool to the weight of the whole machine is between 0.29 W/g and 1.6 W/g.
  • the diameter of the handle of the hand-held power tool is between 28mm and 37mm, and the weight of the whole machine is between 125g and 205g.
  • the hand-held machine tool in this application is used to connect with the adapter 16.
  • the adapter 16 can be connected to different types of hand-held machine tools.
  • the adapter 16 can be connected to a straight grinder or an angle grinder, so that different types of hand-held machine tools can share the same adapter 16, thereby reducing the user's cost.
  • the hand-held machine tool in the present application is connected to the interface of the adapter 16 through a cable 47.
  • the operation can be carried out by holding the hand-held machine tool. Since the cable 47 can be bent, the distance between the hand-held power tool and the adapter 16 can be changed during operation, thereby facilitating the movement of the hand-held power tool, and the man-machine experience is better.
  • the adapter 16 is provided with a mounting part for connecting an external DC power source 49.
  • the external DC power supply is a universal battery pack for electric tools.
  • the battery pack 49 is used to provide power for the hand-held machine tool.
  • the rated voltage of the battery pack is 20V.
  • an operating unit 18 is provided on the adapter 16.
  • the operating unit 18 is used to adjust the rotation speed of the motor provided in the hand-held electrician's tool.
  • the operating unit is a speed control button 18.
  • the speed control knob 18 is used to adjust the rotation speed of the motor.
  • the adapter 16 also includes a switch element for controlling the on and off of the motor.
  • the handle portion of the hand-held power tool may also be provided with a switch element for controlling the operation of the motor. In this way, the user can control the motor while holding the hand-held machine tool without going to the adapter 16 for related operations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Portable Power Tools In General (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

一种手持式工具机（100），包括：壳体（10），具有供用户握持的手柄部（43）；电机，具有电机轴（23）；输出轴（25），由电机轴驱动，用于配接工作头（39）；其中电机的额定功率在60W-200W之间，并且电机的额定功率与手柄部的直径的比值在1.6W/mm-7.2W/mm之间。与现有技术相比，该手持式工具机在保证了一定工作能力的情况下，获得了一种更符合人体工程学的设计，提升了用户的握持体验。

Description

手持式工具机及其系统
本申请要求了申请日为2019年12月13日，申请号为201911285806.9的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种手持式工具机。
本发明还涉及一种包括上述手持式工具机的系统。
背景技术
现有的手持式工具机一般采用有刷电机作为动力部件。而电机的功率与其结构尺寸，特别是径向尺寸正相关。有刷电机的能量密度低，在保证一定工作能力的前提下，电机本身的结构尺寸大，进一步使得手持式工具机整体的结构尺寸大，增加了用户的握持负担。诸如现有的20V直磨工具，有刷电机的直径高达38mm，使得供用户握持的手柄部的直径高达52mm。并且，现有的手持式工具机一般内置电源装置或可拆卸地连接电源装置，用户在利用手持式工具机进行作业时，需要承担电源装置的重量。
发明内容
为了克服现有技术的上述缺陷，本发明所要解决的技术问题是提供一种手持式工具机，其在保证一定工作能力的前提下，拥有更符合人体工程学的、用户友好的优点。
本发明的技术方案是：一种手持式工具机，包括：壳体，包括供用户握持的手柄部；电机，收容于所述壳体内，并具有电机轴；输出轴，由所述电机轴驱动，用于配接工作头；所述电机的额定功率在60W-200W之间，并且所述电机的额定功率与所述手柄部的直径的比值在1.6W/mm-7.2W/mm之间。
在其中一种实施方式中，所述电机为外转子无刷电机，所述无刷电机的直径在18mm-25mm之间。
在其中一种实施方式中，所述手柄部具有中心线，所述手持式工具机沿所述中心线方向的长度在160mm-200mm之间。
在其中一种实施方式中，所述手持式工具机还包括接口，所述接口用于通过线缆连接外部直流电源。
在其中一种实施方式中，所述输出轴的工作转速在5000rpm-35000rpm之间。
在其中一种实施方式中，所述手柄部具有中心线，所述壳体由一对沿所述中心线分布的左、右半壳体卡接而成。
在其中一种实施方式中，所述手持式工具机被构造为直磨；所述壳体包括第一筒部和第二筒部，所述第一筒部收容所述输出轴，所述第二筒部形成所述手柄部；所述第一筒部的最小外径在19mm-27mm之间；所述第二筒部的最大外径在28mm-37mm之间。
在其中一种实施方式中，所述电机的额定功率在60W-120W之间，并且所述电机的额定功率与所述手柄部的直径的比值在1.6W/cm-4.3W/cm之间。
在其中一种实施方式中，所述电机的额定功率在60-120w之间，并且所述电机的额定功率与所述手持式工具机的重量的比值0.4W/g-1W/g在之间。
在其中一种实施方式中，所述手柄部具有中心线，所述手持式工具机沿所述中心线方向的长度在170cm-200cm之间。
在其中一种实施方式中，所述壳体包括第一筒部和第二筒部；其中，所述第一筒部收容所述输出轴，所述第二筒部形成所述手柄部；所述第一筒部的最小外径尺寸在19mm-27mm之间，所述第二筒部的最大外径尺寸在28mm-37mm之间。
在其中一种实施方式中，所述壳体沿纵长方向延伸，具有第一端和第二端；所述输出轴至少部分伸出所述第一端以配接工作头；所述手持式工具机的重心靠近所述第一端布置，并位于所述手持式工具机的长度的1/4处与所述手持式工具机的长度的1/2处之间。
在其中一种实施方式中，所述电机靠近所述第一端布置，并位于所述第一端与所述手持式工具机的长度的1/2处之间。在其中一种实施方式中，所述输出轴的工作转速在5000rpm-35000rpm之间。
在其中一种实施方式中，所述手持式工具机被构造为角磨，所述壳体还包括与所述手柄部呈角度设置的头壳部，所述头壳部收容所述电机。
在其中一种实施方式中，所述电机的额定功率在80W-200W之间，并且所述电机的额定功率与所述手柄部的直径的比值在2.1W/cm-7.2W/cm之间。
在其中一种实施方式中，所述电机的额定功率在80W-200W之间，并且所述电机的额定功率与所述手持式工具机的重量的比值在0.35W/g-1.1W/g之间。
在其中一种实施方式中，所述手柄部远离所述头壳部的一端设有接口，所述接口通过线缆连接外部直流电源。
在其中一种实施方式中，所述手柄部具有中心线，所述手持式工具机在沿所述中心线方向的长度在172.3mm-192.3mm之间。
在其中一种实施方式中，所述头壳部的直径与所述手柄部的直径的比值在0.9-1.1之间。
在其中一种实施方式中，所述手柄部具有中心线，所述输出轴具有与所述工作头配接的端面，在沿所述电机轴的方向上，所述中心线与所述输出轴的端面的距离H1在29.7mm-44.7mm之间。
在其中一种实施方式中，所述头壳部具有顶面，所述输出轴具有与所述工作头配接的端面；所述顶面与所述端面的距离H2在39.2-69.2mm之间。
在其中一种实施方式中，所述输出轴的工作转速在14000rpm-24000rpm之间。
在其中一种实施方式中，所述手柄部还设有用于控制电机工作的开关元件。
与现有技术相比，本发明的手持式工具机采用外转子无刷电机作为驱动源，电机功率在60W-200W之间，工作能力强；并且额定功率与手柄部的直径的比值被设置在一个合理的范围内，由此获得了一种利于用户握持，更符合人体工程学的设计。
本发明的另一技术方案是：一种手持式工具机，包括：壳体，包括用于供用户握持的手柄部；电机，收容于所述壳体内，并具有电机轴；输出轴，由所述电机轴驱动，用于配接工作头；接口，用于通过线缆与外部直流电源连接；所述电机的额定功率在60W-200W之间，并且所述电机的额定功率与所述手持式工具机的重量的比值在0.29W/g-1.6W/g之间。
与现有技术相比，本发明的手持式工具机采用外转子无刷电机作为驱动源，电机功率在60W-200W之间，工作能力强；并且电源装置外置，额定功率与整机重量比值被设置在一个合理的范围内，由此获得了一种用户握持负担小，更符合人体工程学的设计。
为解决上述技术问题，本发明提供一种手持式工具机系统，包括：手持式工具机；适配器，包括用于连接外部直流电源的安装部；所述适配器通过线缆与所述手持式工具机连接，并将所述外部直流电源的电力传输给所述手持式工具机。
在其中一种实施方式中，所述适配器上设有操作单元，所述操作单元用于调节所述电机的工作转速。
在其中一种实施方式中，所述外部直流电源为电动工具通用电池包，所述电池包的额定电压为20V。
与现有技术相比，本发明的手持式工具机系统通过将电源装置外置的技术手段，减轻了用户的握持负担；并且采用外转子无刷电机作为手持式工具机的驱动源，电机功率在60W-200W之间，工作能力强；更进一步地，电机的额定功率与手柄部的直径的比值被设置在一个合理的范围内，更利于用户握持，用户友好度高。
参照后文的说明和附图，详细公开了本发明的特定实施方式，指明了本发明的原理可以被采用的方式。应该理解，本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的特征。
附图说明
在此描述的附图仅用于解释目的，而不意图以任何方式来限制本发明公开的范围。另外，图中的各部件的形状和比例尺寸等仅为示意性的，用于帮助对本发明的理解，并不是具体限定本发明各部件的形状和比例尺寸。本领域的技术人员在本发明的教导下，可以根据具体情况选择各种可能的形状和比例尺寸来实施本发明。
图1为本发明第一实施方式的手持式工具机系统的结构示意图；
图2为图1所示的手持式工具机系统中，涉及手持式工具机的剖面图；
图3为图2所示的手持式工具机中，涉及锁紧单元的示意图；
图4为图2所示的手持式工具机中，涉及锁紧件的示意图；
图5为图2所示的手持式工具机的尺寸示意图；
图6为图2所示的手持式工具机的爆炸图，其中省去了壳体内部的元件；
图7为本发明第二实施方式的手持式工具机系统的结构示意图；
图8为图7所示的手持式工具机系统中，涉及手持式工具机的部分剖面图，其中示出了冷却气流的流向；
图9为图7所示的手持式工具机系统中，涉及手持式工具机的结构示意图；
图10为图9所示的手持式工具机的尺寸示意图；
图11为图9所示的手持式工具机的爆炸图，其中省去了壳体内部的元件；
图12为图2所示的手持式工具机中，涉及主轴锁的剖面图；
图13为本发明第一、第二实施方式中，涉及外转子无刷电机定位的剖面图。
以上附图的附图标记：
10、壳体；12、定子；13、金属套筒；14、细部；15、虎口部；16、适配器；17、开关元件；18、调速钮；19、塑料联轴器；21、转子；23、电机轴；24、风扇嵌件；25、输出轴；27、风扇；26、紧固螺钉；29、连接部；31、第一凹槽；33、锁紧套；35、第一凸起；37、锁紧件；39、工作头；41、头壳部；43、手柄部；47、线缆；49、电池包；51、护罩；53、出风口；55、进风口；57、操作钮；59、环形弹簧；61、第三凹槽；63、锁定 销；65、第一斜面；67、第二斜面；69、第三斜面；71、第四斜面；73、割槽；75、第一半部；77、第二半部；79、第一段部；81、第二段部；83、压板；85、卡接槽；87、卡接凸起。
具体实施方式
结合附图和本发明具体实施方式的描述，能够更加清楚地了解本发明的细节。但是，在此描述的本发明的具体实施方式，仅用于解释本发明的目的，而不能以任何方式理解成是对本发明的限制。在本发明的教导下，技术人员可以构想基于本发明的任意可能的变形，这些都应被视为属于本发明的范围。需要说明的是，当元件被称为“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。术语“安装”、“相连”、“连接”应做广义理解，例如，可以是机械连接或电连接，也可以是两个元件内部的连通，可以是直接相连，也可以通过中间媒介间接相连，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
请参见图1至图6，为本发明第一实施方式提供的手持式工具机100及其系统。本实施方式中，手持式工具机100被构造为直磨。
如图1所示，手持式工具机系统包括直磨100和适配器16，其中适配器16设有用于连接外部直流电源49的安装部。当适配器16连接外部直流电源49并通过线缆47与直磨100连接时，外部直流电源49的电力便经由适配器16传输给直磨100，供其工作。
本实施方式中，外部直流电源49被构造为电动工具通用电池包。
如图1、2所示，本实施方式中，手持式工具机100包括壳体10。壳体10沿纵长方向延伸，具有在其延伸方向的第一端和第二端。其中，第二端设有用于连接线缆47的接口11。
壳体10的至少部分侧壁形成供用户握持的手柄部。
壳体10内收容有电机。该电机为外转子无刷电机，包括定子12、转子21以及与转子21相连的电机轴23。
一种可能的实施方式中，壳体10和定子12其中之一上设置有第一凹槽，另一设置有用于与第一凹槽相配合的第一凸起。通过第一凸起和第一凹槽的配合，使得壳体10与定子12相固定，进而使得电机轴23能够随着转子21一齐相对于定子12而转动。
当然，定子12与壳体10之间还可以通过其他类型的配合来实现两者的相对固定，本申请对此不做限定。
如图13所示，本实施方式中，壳体10的内壁上沿周向间隔设置有多个第一凸起35。定子12的外壁上对应设置有多个第一凹槽31。多个第一凹槽31与多个第一凸起35相互配合，从而两者之间保持相对静止。转子21与电机轴23固定连接。该固定连接可以是螺钉连接、螺栓连接、焊接、一体成型等。从而电机轴23能随转子21一齐转动。
如图2所示，壳体10内还收容有输出轴25。输出轴25至少部分伸出前述第一端，用于配接工作头。本实施方式中，输出轴25与电机轴23无相对转动的连接，并且由电机轴23直接驱动。也即，电机轴23与输出轴25之间无齿轮传动和减速箱等结构，从而，手持式工具机100的整体尺寸更小，质量更轻，便于操作者携带使用。
进一步地，输出轴25通过轴承支撑于金属套筒13内，金属套筒13支撑于壳体10内。由于金属套筒13的结构强度更高，故金属套筒13能对输出轴25提供更佳的支撑力。
鉴于无刷电机具有比有刷电机更高的能量密度，故，在相同功率的条件下，无刷电机的直径更小、长度更短，并且防堵转能力更强；进而使得采用无刷电机作为驱动源的手持式工具机100的整机体积更小，更方便携带和存储。
本实施方式中，无刷电机的额定功率60W-120W之间，电机的直径在18mm-25mm之间。作为对比，相同功率下，有刷电机的直径可以达到38mm左右。
更为优选的，外转子无刷电机的直径为23mm，轴向尺寸为10mm。
更为优选的，外转子无刷电机的额定功率为100W。
本实施方式中，输出轴25的转速在5000rpm-35000rpm之间。
如图1、图2所示，壳体10沿纵长方向延伸，包括第一筒部79和第二筒部81；其中，第一筒部79收容输出轴25，第二筒部81形成前述手柄部。
第一筒部79还包括用于供手指抓握的细部14。当用户通过执笔式姿势单手持握时，细部14由手指握住，手柄部托于虎口。此处，定义手柄部上由虎口支撑的部分为虎口部15。
如图2所示，第一筒部79的径向尺寸自左向右逐渐减小又逐渐增大，第二筒部81则整体上呈圆柱状。细部14具有第一筒部79的最小外径D1，该最小外径D1的尺寸范围在19mm至27mm之间。
优选的，如图5所示，该细部14的最小外径尺寸D1为22mm。
如图5所示，手柄部具有中心线X1。本实施方式中，手持式工具机100沿该中心线X1方向的长度L1在160mm至200mm之间。
优选的，手持式工具机100沿手柄中心线X1方向的长度L1为187mm。
本实施方式中，手持式工具机100的重心靠近第一端布置，并位于手持式工具机100的整机长度的1/4处与整机长度的1/2处之间。也即，当用户通过执笔时姿势单手持握手持式工具机时，该手持式工具机100的重心位于虎口部15与细部14之间。
优选地，该手持式工具机100的重心位于虎口部15朝向细部14的一侧。例如如图2所示，该手持式工具机100的重心大致位于虎口部15的左侧。
由于电机的重量占手持式工具机100的整机重量的比值较大，它的布局将影响整机重心的位置。故，本实施方式中，电机靠近所述第一端布置，并位于第一端与手持式工具机100的整机长度的1/2处之间。也即，将手持式工具机100沿其纵长延伸方向均分成两段时，电机完全位于靠近输出轴25的那一段内。
如图2所示，电机轴23、输出轴25以及手柄部的延伸方向一致，如此能减少不同轴所带来的振动与噪音。
具体地，输出轴25通过塑料联轴器19与电机轴23无相对转动地连接。输出轴25的另一端设置有用于配接工作头39的锁紧单元。
如图3、图4所示，锁紧单元包括锁紧套33和锁紧件37。锁紧件37套设于锁紧套33内，锁紧件37内设置有用于供工作头39穿设的贯通通道；锁紧套33与输出轴25相连；以使锁紧件37能抵接在输出轴25与锁紧套33之间，进而使锁紧件37限制工作头39移动。
具体地，锁紧套33的一端与输出轴25相连。如图3所示，锁紧套33的右端与输出轴25相连。该连接方式可以是螺钉连接、螺栓连接等。进一步地，锁紧套33的另一端的内壁上设置有第一斜面65。输出轴25的端面上设置有第二斜面67。进一步地，该第一斜面65和第二斜面67的相对倾斜。该第一斜面65与第二斜面67之间形成锁紧空间。如图4所示，锁紧件37的外壁上沿轴向间隔设置有分别与第一斜面65和第二斜面67相配合的第三斜面69和第四斜面71。从而当锁紧套33朝向输出轴25移动时，能将锁紧件37抵接在输出轴25与锁紧套33之间。
锁紧件37的外壁上沿周向设置有多个自第三斜面69至第四斜面71延伸的割槽73；所以在旋紧锁紧套33时，第一斜面65不断作用于锁紧件37的第三斜面69，割槽73的宽度被压缩，从而抱紧工作头39。也即在第一斜面65、第二斜面67、第三斜面69和第 四斜面71的作用下，当工作头39穿设贯通通道时，锁紧件37靠近割槽73的一侧朝向工作头39收缩，如此限制工作头39沿轴向移动。
安装时，首先将锁紧件37插入输出轴25内并使得第四斜面71与第二斜面67相抵。然后将锁紧套33与输出轴25螺纹连接，并使得该螺纹连接为松配合。接着将工作头39插入锁紧件37内的贯通通道直至达到用户意愿的预定深度。最后旋紧锁紧套33，以使锁紧套33的第一斜面65与锁紧件37的第三斜面69不断抵接，从而锁紧件37的前端受力抱紧输出轴25。
本实施方式中，手持式工具机100还包括：设置于壳体10内的风扇27。该风扇27用于对外转子无刷电机进行散热。
进一步地，如图2所示，电机轴23上固定设置有风扇嵌件24。该固定方式可以是螺钉固定、螺栓固定、焊接固定、一体成型固定等。该风扇27固定于该风扇嵌件24上。
风扇嵌件24上设置有主轴锁。如图12所示，该主轴锁包括锁定销63和用于供用户操作的操作钮57。锁定销63能在操作钮57的作用下抵接风扇嵌件24，从而限制电机轴23转动，并最终限制输出轴25转动，如此即能安装或者拆解工作头39。
由于输出轴25的径向尺寸小于风扇嵌件24的径向尺寸，所以相比于作用于输出轴25上，锁定销63作用于风扇嵌件24上能避免对输出轴25造成损伤。
进一步地，如图12所示，壳体10内设置有环形弹簧59。环形弹簧59与操作钮57相连，提供促使操作钮57远离风扇嵌件24的作用力。操作钮57的內端上设置有第三凹槽61。该锁定销63一端穿设于该第三凹槽61中，另一端与风扇嵌件24相接触。
进一步地，壳体10上设置有靠近风扇27的出风口53和远离风扇27的进风口55。例如如图1所示，进风口55设置于第二筒部81上。
由于螺钉连接需要占用工具机100的径向尺寸，所以为了减小工具机100的尺寸，壳体10采用无螺钉设计。具体地，壳体10由一对沿中心线X1分布的左、右半壳体卡接而成。例如如图6所示，该左、右半壳体分别为第一半部75和第二半部77。该第一半部75和第二半部77外观采用无螺钉设计。具体地，该第一半部75和第二半部77可以通过卡扣以及销钉固定连接。进一步地，第一半部75和第二半部77其中之一设置有卡接槽85，另一设置有卡接凸起87。
一种最佳的，在对于所述手持式工具机100的操纵方面的设计通过以下方式来实现：最佳的选择了手持式工具机100的额定功率相对于手柄部的直径的比值。可以想到的是，如果手持式工具机100的额定功率相对于手柄部的直径的比例太小，则意味着手柄部较粗，不方便握持。后果是，操作者快速疲劳。手持式工具机100的额定功率相对于手柄部的直 径的最佳比值也取决于功率范围，在该功率范围内，安排了该手持式工具机100。本实施方式中，手持式工具机100的额定功率在60W-120W之间，额定功率相对于手柄部的直径的比值在1.6W/mm-4.3W/mm之间。
手持式工具机100的另一种在人体工程学上的设计方案可以通过以下方式来实现：最佳的选择了手持式工具机100的额定功率相对于整机重量的比值。手持式工具机100的重量从该手持式工具机100的、所有组件的总重中产生，没有考虑到线缆47以及电池包49的重量，也没有考虑到工作头，防护罩以及可能装入的其他附件的重量，如果存在这些的话。可以想到的是，如果手持式工具机100的额定功率相对于整机重量的比值太小，则意味着手持式工具机100在用户的手中较重。后果是，操作者快速疲劳。手持式工具机100的额定功率相对于整机重量的最佳比值也取决于功率范围，在该功率范围内，安排了该手持式工具机100。本实施方式中，手持式工具机100的额定功率在60W-120W之间，额定功率相对于整机重量的比值在0.4W/g-1W/g之间。
本实施方式中，由于外转子无刷电机的使用，可以在不牺牲手持式工具机100的功率的情况下，将壳体10的尺寸尽可能地做小；并且，为了更加利于用户握持，手柄部的直径尺寸被设置在一个合理的范围内。
一种可能的实施方式中，手柄部的直径尺寸D2在28-37mm之间。
优选的，手柄部的直径尺寸D2在31-33mm之间。
一种可能的实施方式中，手持式工具机100的整机重量在125g-145g之间。
本申请实施方式的直磨，一方面，通过外转子无刷电机的选用，在不牺牲直磨本身工作能力的前提下，大大减小了电机的结构尺寸，从而使得手柄部的径向尺寸更利于用户握持，提升了用户的握持体验；另一方面，通过将电源装置外置以及外转子无刷电机的选用，在不牺牲直磨本身工作能力的前提下，大大减小了工具机100的重量，减轻了用户的握持负担。
图7至图11示出了本发明第二实施方式提供的手持式工具机100’及其系统。本实施方式中，手持式工具机100’被构造为角磨。
请参见图7和图8。图7示出了本申请实施方式所述的角磨100’与适配器16连接的示意图。图8示出了本申请实施方式所述的角磨100’的部分结构示意图。
如图7、图8所示，本申请实施方式所述的手持式工具机100’包括壳体10’。壳体10’包括头壳部41和手柄部43。其中，手柄部43远离头壳部41的一端设有用于连接线缆47的接口，手持式工具机100’通过该接口11’连接适配器16。
头壳部41与手柄部43呈角度地设置，其内收容有电机。具体地，头壳部41沿竖直 方向设置，其与手柄部43之间的夹角在90度-110度之间。也即，手柄部43相对于水平方向垂直或上翘设计。
优选的，如图7所示，头壳部41与手柄部43垂直设置；并且头壳部41与手柄部43呈T形。
如图10所示，手柄部43具有中心线X1’。手持式工具机100’沿该中心线X1’方向的长度L1’在172.3mm至192.3mm之间。
优选地，手持式工具机100’沿中心线X1’方向的长度L1’为182.3mm。
本实施方式中，电机为外转子无刷电机，包括定子12’、转子21’以及与转子21’相连的电机轴23’。
一种可能的实施方式中，壳体10’和定子12’其中之一上设置有第一凹槽，另一设置有用于与第一凹槽相配合的第一凸起。通过第一凸起和第一凹槽的配合使得壳体10’与定子12’相固定，从而使得电机轴23能随着转子21’一齐相对于定子12转动。
本实施方式中，定子12’与壳体10’相互配合的方式与第一实施方式相同，此处不再赘述。
本实施方式中，输出轴25’与电机轴23’无相对转动的连接，并且由电机轴23’直接驱动。也即，电机轴23’与输出轴25’之间无齿轮传动和减速箱等结构，从而工具机100’整体尺寸较小，质量更轻，便于操作者携带使用。
进一步地，如图8所示，电机轴23’的轴线与输出轴25’的轴线大致重合布置。也即，电机轴23’与输出轴25’同轴设置，如此能减少不同轴所带来的振动与噪音。并且，输出轴25’与头壳部41同轴布置，如此，整机更加集中。
进一步地，输出轴25’位于电机轴23’的远离手柄部43的一侧，至少部分伸出头壳部43以配接工作头39’。如图8所示，输出轴25’的上端与电机轴23’的下端相连。
如图8、图9所示，输出轴25一端具有内螺纹。工作头39’可通过与内螺纹配接的紧固螺钉26直接紧固在输出轴25’上，从而使得工作头39’拆卸方便。进一步地，工作头39’背对输出轴25’的一侧设置有压板83。压板83上设置有用于供紧固螺钉26穿过的贯穿孔。紧固螺钉26通过贯穿孔与输出轴25’内的内螺纹连接。工作头39’位于压板83与输出轴25’之间。
鉴于无刷电机具有比有刷电机更高的能量密度，故，在相同功率的条件下，无刷电机的直径更小、长度更短，并且防堵转能力更强；进而使用该电机替换有刷电机的手持式工具机100’能缩小整机的体积，更方便携带和存储。
本实施方式中，无刷电机的额定功率80W-200W之间，电机的直径在18mm-25mm 之间，轴向尺寸为24mm。
与第一实施方式不同，本实施方式的角磨100’，壳体10’包括头壳部41以及与头壳部41呈角度设计的手柄部43；而外转子无刷电机位于头壳部41。
用于反映手持式工具机100’的紧凑性及电机的功效的另一个指标是头壳部41的直径D1’与手柄部43的直径D2’的比例关系。当头壳部41的直径与手柄部43的直径的比值在0.9-1.1之间时，尤其获得一种符合人体工程学的手持式工具机100’。
本实施方式中，头壳部41的直径D1’在29mm-37mm之间。
一种更佳的，在对于所述手持式工具机100’的操纵方面的设计通过以下方式来实现：最佳的选择了手持式工具机100’的额定功率相对于手柄部43的直径的比值。可以想到的是，如果手持式工具机100’的额定功率相对于手柄部43的直径的比例太小，则意味着手柄部43较粗，不方便握持。后果是，操作者快速疲劳。手持式工具机100’的额定功率相对于手柄部43的直径的最佳比值也取决于功率范围，在该功率范围内安排了该手持式工具机100’。本实施方式中，手持式工具机100’的额定功率在80W-200W之间，额定功率相对于手柄部43的直径的比值在2.1W/mm-7.2W/mm之间。
一种可能的实施方式中，手柄部43的直径D2’在28mm-37mm之间。特别优选的，手柄部43的直径D2’在31mm-33mm之间。
此处，也可以通过手柄部43的周长来限定其径向尺寸。一种可能的实施方式中，手柄部43的周长在85mm至120mm之间，尤其优选地为100mm。
所述手持式工具机100’的另一种在人体工程学上的设计方案可以通过以下方式来实现：最佳的选择了手持式工具机100’的额定功率相对于整机重量的比值。所述手持式工具机100’的重量从该手持式工具机100’的、所有组件的总重中产生，没有考虑到线缆47’以及电池包49’的重量，也没有考虑到工作头，防护罩以及可能装入的其他附件的重量，如果存在这些的话。如果手持式工具机100’的额定功率相对于整机重量的比值太大，则意味着该手持式工具机100’在用户的手中较重。后果是，操作者快速疲劳。手持式工具机100’的额定功率相对于整机重量的最佳比值也取决于功率范围，在该功率范围内，安排了该手持式工具机100’。本实施方式中，手持式工具机100’的额定功率在80W-200W之间，额定功率相对于整机重量的比值在0.35W/g-1.1W/g之间。
一种可能的实施方式中，手持式工具机100’的重量在185g-205g之间。
本实施方式中，输出轴25’的转速范围在14000rpm-24000rpm之间。
为了使得工作头39’相对于手持式工具机100’的比例协调，同时也保证工作头39’本身的工作效率，使得工具机100’整体紧凑高效，本实施方式中，工作头39’为环形件，并 且工作头39’的直径范围在36mm-55mm之间。
进一步地，该工作头39’可以包括圆盘状的切割片或砂磨件。圆盘状的切割片或砂磨件垂直安装于输出轴25’。
进一步地，如图8所示，当工作头39’为切割片时，手持式工具机100’具有与壳体10’可拆卸连接的护罩51。该护罩51用于收容至少部分工作头39’，以防止工具机100’在工作过程中有工作碎屑飞溅到操作者附近。
进一步地，如图10所示，当手柄部43的中心线X1’与输出轴25’的用于与工作头39’配接的端面之间的距离H1越大时，手持式工具机100’在进行相关作业时所产生的陀螺效应越明显，这会导致用户握持的不舒适性。而当手柄部43的中心线X1’与输出轴25’的用于与工作头39’配接的端面之间的距离H1越小时，用户握持手持式工具机100’的手越靠近工作头39’，这会导致作业的危险性以及不方便性；并且，手柄部43的中心线X1’与输出轴25’的用于与工作头39’配接的端面之间的距离H1越小，也不利于无刷电机的散热。具体的，如图7、8所示，当手柄部43的中心线X1’与输出轴25’的用于与工作头39’配接的端面之间的距离H1越小，一定程度上也说明了收容于头壳41内部的电机越往上布置；这使得无刷电机与手柄部43内壁之间的空间变小，也即，壳体10’内为散热流所提供的流通通道的空间变小，从而不利于电机的散热。
故，手柄部43的中心线X1’与输出轴25’的用于与工作头39’配接的端面的距离H1应被安排在一个合理的范围内。本实施方式中，手柄部43的中心线X1’与输出轴25’的用于与工作头39’配接的端面之间的距离H1在29.7mm至44.72mm之间。
优选的，中心线X1’与输出轴25’的用于与工作头39’配接的端面的距离H1为44.72mm。
当该距离为0时，手持式工具机100’为直柄型。
为了提高手持式工具机100’的可接近性，满足在狭小空间的工作需求，头壳部41在沿竖直方向的尺寸也应被安排在合理的范围内。本实施方式中，头壳部41的顶面与输出轴25’的端面的距离H2在39.2mm至69.2mm之间。
优选的，头壳部41的顶面与输出轴25’的端面的距离H2为69.2mm。
进一步地，头壳部41沿输出轴25’轴线方向的顶面与护罩51端面的距离H3在38mm至80mm之间。特别优选地，H3为78.5mm。
本申请实施方式所述的手持式工具机100’还包括：设置于手柄部43内的用于控制无刷电机工作的电路板(未图示)。
由于无刷电机的能量密度大于有刷直流电机，其在工作时产生的热量也会高于有刷直流电机。并且，用于控制电机工作的电路板上也会产生大量热量。为此，本实施方式的手 持式工具机100’还设置有散热单元。
如图7，图8所示，散热单元至少包括：固定设置在输出轴25’上的风扇27’；开设在手柄部43上的进风口55’以及开设在头壳部上的出风口53’。
如前所述，为了取得良好的散热效果，电机与手柄部43的内壁之间必需留有一定的空间供散热气流通过。本实施方式中，在沿竖直方向上，无刷电机的顶面与手柄部43的最顶端的内壁之间的距离在2mm-5mm之间。
一种可能的实施方式中，头壳部还可以与手柄部倾斜设置；手柄部开设有进风口，头壳部开设有出风口。风扇转动时，散热气流依次流经电路板与电机，为二者散热。此时，为了取得良好的散热效果，手柄部的内壁与电机之间需保留一定的空间供散热气流通过；也即，手柄部最顶端的内壁的延伸平面与电机不相交。
手柄部43上还设置有用于控制外转子无刷电机启动或关闭的开关元件17。
进一步地，由于螺钉连接需要占用工具机100’的径向尺寸，所以为了减小工具机100’的尺寸，壳体10’外观采用无螺钉设计。具体地，壳体10’包括由一对沿手柄部中心线X1’分布的左、右半壳体卡接而成。例如如图11所示，该左、右半壳体分别为第一半部75’和第二半部77’。该第一半部75’和第二半部77’外观采用无螺钉设计。具体地，该第一半部75’和第二半部77’可以通过卡扣以及销钉固定连接。进一步地，第一半部75’和第二半部77’其中之一设置有卡接槽，另一设置有卡接凸起。
一种可能的实施方式中，为了增强头壳部41对于电机的支撑性，头壳部41可以采用螺钉连接。
本申请的角磨100’，一方面通过电源装置外置以及外转子无刷电机的选用，在不牺牲角磨100’本身工作能力的前提下，大大减小了工具机100’的重量，减轻了用户的握持负担；另一方面，通过外转子无刷电机的选用，在不牺牲角磨100’本身工作能力的前提下，大大减小了电机的结构尺寸，使得手柄部43的径向尺寸更加利于用户握持，提升了用户的握持体验。
如图1至图13所示，为本申请所述的手持式工具机及其系统。手持式工具机通过线缆47与适配器16相连，接收自适配器16传输的外部直流电源49的电力。适配器16设置有用于连接外部直流电源49的安装部。也即，本申请的手持式工具机，通过电源装置外置的技术手段减轻了整机的重量，从而减小了用户的握持负担。
进一步地，本申请所述的手持式工具机包括：壳体，壳体的至少部分侧壁形成手柄部，手柄部的径向尺寸为28mm至37mm；外转子无刷电机，额定功率在60至200W之间；输出轴，其与电机轴无相对转动的连接且由电机轴直接驱动，所述输出轴用于与工作头配 接。
本申请所述的手持式工具机，采用额定功率为60至200W的外转子无刷电机作为动力部件。在相同功率的条件下，该电机比有刷电机的直径更小、长度更短、且防堵转能力更强。进而使用该电机替换有刷电机的手持式工具机能缩小整机的体积，如此也能减小手柄部的尺寸，进而更方便携带和存储。
进一步地，本申请的手持式工具机，其额定功率与手柄部的直径的比值在1.6W/mm-7.2W/mm之间，由此获得了一种符合人体工程学并且工作能力强的设计。
该手持式工具机另一个符合人体工程学的构型通过手持式工具机的额定功率与整机重量的比值来限定，由此获得一种既保证工作能力又利于用户握持的设计。本实施方式中，手持式工具的额定功率与整机重量的比值在0.29W/g-1.6W/g之间。
进一步地，手持式工具机的手柄部的直径28mm-37mm在之间，整机重量在125g-205g之间。
本申请中的手持式工具机，用于与适配器16相连。具体地，该适配器16可以与不同类型的手持式工具机相连。例如该适配器16可以与直磨或者角磨相连，如此能使不同类型的手持式工具机共用一个适配器16，进而降低用户的成本。
进一步地，如图1和图7所示，本申请中的手持式工具机通过线缆47与适配器16的接口相连。如此可以使得操作时，可通过握持手持式工具机进行操作。由于线缆47能发生弯曲，所以操作时，手持式工具机与适配器16之间的距离能发生变化，进而方便移动手持式工具机，人机体验更佳。
进一步地，该适配器16设置有用于连接外部直流电源49的安装部。例如如图1和图7所示，该外部直流电源为电动工具通用电池包。该电池包49用于为所述手持式工具机提供电力。
一种可能的实施方式中，电池包的额定电压为20V。
进一步地，该适配器16上设有操作单元18。该操作单元18用于调节设置在手持电工工具内的电机的转速。具体的，该操作单元为调速钮18。该调速钮18用于调节电机的转速。
进一步地，该适配器16还包括开关元件，用于控制电机的开启与关闭。
一种可能的实施方式中，如图7所示，手持式工具机的手柄部也可以设置用于控制电机工作的开关元件。如此，用户在握持手持式工具机时即可对电机进行相关控制，而无需前往适配器16处进行相关操作。
披露的所有文章和参考资料，包括专利申请和出版物，出于各种目的通过援引结合于 此。描述组合的术语“基本由...构成”应该包括所确定的元件、成分、部件或步骤以及实质上没有影响该组合的基本新颖特征的其他元件、成分、部件或步骤。使用术语“包含”或“包括”来描述这里的元件、成分、部件或步骤的组合也想到了基本由这些元件、成分、部件或步骤构成的实施方式。这里通过使用术语“可以”，旨在说明“可以”包括的所描述的任何属性都是可选的。多个元件、成分、部件或步骤能够由单个集成元件、成分、部件或步骤来提供。另选地，单个集成元件、成分、部件或步骤可以被分成分离的多个元件、成分、部件或步骤。用来描述元件、成分、部件或步骤的公开“一”或“一个”并不说为了排除其他的元件、成分、部件或步骤。
本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (17)

  1. 一种手持式工具机，其特征在于，所述手持式工具机包括：
    壳体，包括供用户握持的手柄部；
    电机，收容于所述壳体内，并具有电机轴；
    输出轴，由所述电机轴驱动，用于配接工作头；
    所述电机的额定功率在60W-200W之间，并且所述电机的额定功率与所述手柄部的直径的比值在1.6W/mm-7.2W/mm之间。
  2. 根据权利要求1所述的手持式工具机，其特征在于，所述电机为外转子无刷电机，所述无刷电机的直径在18mm-25mm之间。
  3. 根据权利要求1所述的手持式工具机，其特征在于，所述手柄部具有中心线，所述手持式工具机沿所述中心线方向的长度在160mm-200mm之间。
  4. 根据权利要求1所述的手持式工具机，其特征在于，所述手持式工具机还包括设置在所述壳体上的接口，所述接口用于通过线缆连接外部直流电源。
  5. 根据权利要求1所述的手持式工具机，其特征在于，所述输出轴的工作转速在5000rpm-35000rpm之间。
  6. 根据权利要求1所述的手持式工具机，其特征在于，所述手柄部具有中心线，所述壳体由一对沿所述中心线分布的左、右半壳体卡接而成。
  7. 根据权利要求1所述的手持式工具机，其特征在于，所述手持式工具机被构造为直磨；所述壳体包括第一筒部和第二筒部，所述第一筒部收容所述输出轴，所述第二筒部形成所述手柄部；所述第一筒部的最小外径在19mm-27mm之间；所述第二筒部的最大外径在28mm-37mm之间。
  8. 根据权利要求7所述的手持式工具机，其特征在于，所述壳体沿纵长方向延伸，具有第一端和第二端；所述输出轴至少部分伸出所述第一端以配接工作头；所述手持式工具机的重心靠近所述第一端布置，并位于所述手持式工具机的长度的1/4处与所述手持式工具机的长度的1/2处之间。
  9. 根据权利要求8所述的手持式工具机，其特征在于，所述电机靠近所述第一端布置，并位于所述第一端与所述手持式工具机的长度的1/2处之间。
  10. 根据权利要求1所述的手持式工具机，其特征在于，所述手持式工具机被构造为角磨，所述壳体还包括与所述手柄部呈角度设置的头壳部，所述头壳部收容所述电机。
  11. 根据权利要求10所述的手持式工具机，其特征在于，所述头壳部的直径与所述手柄部的直径的比值在0.9-1.1之间。
  12. 根据权利要求10所述的手持式工具机，其特征在于，所述手柄部具有中心线，所述输出轴具有与所述工作头配接的端面，在沿所述电机轴的方向上，所述中心线与所述输出轴的端面的距离H1在29.7mm-44.7mm之间。
  13. 如权利要求10所述的手持式工具机，其特征在于，所述手柄部还设有用于控制电机工作的开关元件。
  14. 一种手持式工具机，其特征在于，所述手持式工具机包括：
    壳体，包括供用户握持的手柄部；
    电机，收容于所述壳体内，并具有电机轴；
    输出轴，由所述电机轴驱动，用于配接工作头；
    接口，设置在所述壳体上，用于通过线缆与外部直流电源连接；
    所述电机的额定功率在60W-200W之间，并且所述电机的额定功率与所述手持式工具机的重量的比值在0.29W/g-1.6W/g之间。
  15. 一种手持式工具机系统，其特征在于，其包括：
    如权利要求1至14中任一项所述的手持式工具机；
    适配器，包括用于连接外部直流电源的安装部；所述适配器通过线缆与所述手持式工具机连接，并将所述外部直流电源的电力传输给所述手持式工具机。
  16. 根据权利要求15所述的手持式工具机系统，其特征在于，所述适配器上设有操作单元，所述操作单元用于调节所述电机的工作转速。
  17. 根据权利要求15所述的手持式工具机系统，其特征在于，所述外部直流电源为电动工具通用电池包，所述电池包的额定电压为20V。
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Publication number Priority date Publication date Assignee Title
US11837935B2 (en) 2021-02-02 2023-12-05 Black & Decker, Inc. Canned brushless motor
US11855521B2 (en) 2021-02-02 2023-12-26 Black & Decker, Inc. Brushless DC motor for a body-grip power tool
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US11876424B2 (en) 2021-02-02 2024-01-16 Black & Decker Inc. Compact brushless motor including in-line terminals
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CN215548423U (zh) 2022-01-18

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