WO2023061140A1 - 砂光机 - Google Patents

砂光机 Download PDF

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Publication number
WO2023061140A1
WO2023061140A1 PCT/CN2022/118810 CN2022118810W WO2023061140A1 WO 2023061140 A1 WO2023061140 A1 WO 2023061140A1 CN 2022118810 W CN2022118810 W CN 2022118810W WO 2023061140 A1 WO2023061140 A1 WO 2023061140A1
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WO
WIPO (PCT)
Prior art keywords
sander
central axis
distance
airflow
equal
Prior art date
Application number
PCT/CN2022/118810
Other languages
English (en)
French (fr)
Inventor
张锐
展锐
Original Assignee
南京泉峰科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 南京泉峰科技有限公司 filed Critical 南京泉峰科技有限公司
Priority to EP22880080.1A priority Critical patent/EP4382251A1/en
Priority to CN202280011206.7A priority patent/CN117651625A/zh
Publication of WO2023061140A1 publication Critical patent/WO2023061140A1/zh
Priority to US18/595,749 priority patent/US20240198483A1/en

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Classifications

    • 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
    • B24B23/03—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor the tool being driven in a combined movement
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/007—Weight compensation; Temperature compensation; Vibration damping
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/102—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with rotating tools
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • B24B55/105—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided with oscillating tools

Definitions

  • This application relates to a sander.
  • a sander is an electric tool used for sanding operations. It is often used to sand uneven or uneven walls, tabletops, etc., to obtain a surface with a target smoothness.
  • Sanding machines are also called belt sanders, grinder machines or polishing machines.
  • Hand-held sanders are an important category of sanders. They are widely used in various industries due to their small size and easy portability.
  • the sander will generate dust during the sanding operation, and the dust can be discharged in a specific direction after being sucked into the shell of the sander, so the smaller the dust suction resistance, the higher the dust collection efficiency of the sander.
  • the application provides a sander with low dust suction resistance and long battery life.
  • a sander comprising: an airflow element that can rotate around a central axis in a predetermined direction of rotation to generate a chip removal airflow; a motor configured to provide a power source for the airflow element; a battery pack , is set to provide an energy source to the motor; wherein, in response to determining that the sander is in an unloaded state, the working time of the sander when the battery pack consumes 10WH of energy is defined as the sander
  • the function time T of the sander; the product of the no-load speed N of the motor and the function time T of the sander is greater than or equal to 63000rpm.min and less than or equal to 120000rpm.min.
  • a sander comprising: an airflow element, which can rotate around a central axis in a predetermined direction of rotation to generate a chip removal airflow; a motor, configured to provide a power source for the airflow element; a battery pack, configured to provide an energy source for the motor; a housing
  • the body is configured to accommodate the airflow element and guide the chip flow generated by the airflow element; a guide wall is formed on the back of the housing, and the distance from the guide wall to the central axis is defined as a first distance, and the first distance gradually increases along the preset direction of rotation.
  • the inner wall includes a first end and a second end on a plane perpendicular to the central axis, the guide wall connects the first end and the second end, and the distance from the first end to the central axis is greater than or equal to 40mm and less than or equal to 60mm.
  • a sander comprising: an airflow element, which can rotate around a central axis in a predetermined direction of rotation to generate a chip removal airflow; a motor, configured to provide a power source for the airflow element; a battery pack, configured to provide an energy source for the motor; a housing
  • the body is configured to accommodate the air flow element and guide the chip flow generated by the air flow element; the housing includes an upper side wall and a lower side wall opposite to the upper side wall; the lower side wall to the upper side wall are in the direction along the centerline axis
  • the distance of is defined as the third distance, and the third distance gradually increases along the preset rotation direction.
  • Fig. 1 is the perspective view of the sander of the present application
  • Fig. 2 is a perspective view of the sander shown in Fig. 1 with part of the shell removed;
  • Fig. 3 is a plan view of the complete sander shown in Fig. 1;
  • Fig. 4 is a sectional view of the sander shown in Fig. 3 along the A-A direction;
  • Fig. 5 is a sectional view of the sander shown in Fig. 3 along the B-B direction;
  • Fig. 6 is a partial enlarged view of the sectional view of the sander shown in Fig. 5;
  • Fig. 7 is a simplified schematic diagram of a structural section of the air flow element and the chip removal housing in the present application.
  • Fig. 8 is another simplified schematic diagram of the structural section of the airflow element and the chip removal housing in the present application.
  • Fig. 9 is a perspective view of the centrifugal fan in the sander shown in Fig. 1;
  • Fig. 10 is a perspective view of another perspective of the centrifugal fan shown in Fig. 9;
  • Figure 11 is a plan view of the centrifugal fan shown in Figure 9;
  • Fig. 12 is a partially enlarged view of the centrifugal fan shown in Fig. 11;
  • Fig. 13 is a schematic perspective view of part of the chip removal housing in Fig. 3 .
  • Figure 1 shows a sander 100 with a chip removal device 10, which can drive a functional element to move, and the functional element can be sandpaper, so that the sander 100 can sand the surface of a workpiece made of various materials through the functional element Grinding, finishing, etc.
  • the sander 100 will produce a large amount of chips during the grinding process, and the chips will also be sucked into the chip removal device 10 during the grinding process, and the chip removal device 10 will discharge the chips to a preset position, and the user
  • a dust collection device can be installed at a preset position to discharge the debris discharged from the chip removal device 10 into the dust collection device, thereby achieving the effect of dust collection.
  • the chip removal device 10 is not only used on the sander 100, but also can be used on other electric tools that require dust collection and/or chip removal.
  • the chip removal device 10 can be integrated with the electric tool , can also be in a separate state from the electric tool, that is, the electric tool and the chip removal device 10 are two machines, and the two cooperate during operation to realize the functions of dust collection and/or chip removal.
  • the following will take the sander 100 as an example for description, and define up, down, left, right, front, and back as shown in FIG. 1 for ease of description.
  • the sander 100 includes: a housing 20 , a switch assembly 30 , a bottom plate assembly 40 , a power assembly 50 , a chip removal device 10 , an eccentric element 60 and an energy source 70 .
  • the shell 20 forms the exterior part of the sander 100 , and the shell 20 at least forms a handle portion 21 , a receiving portion 22 and a bracket portion 23 .
  • the handle part 21 is used for holding by the user.
  • One end of the handle part 21 is connected to the accommodating part 22, and the other end can be used to connect an external power cable, or form a connecting seat for installing a portable DC power supply such as a battery pack.
  • the accommodating part 22 is located between the handle part 21 and the bracket part 23 , an accommodating cavity is formed inside the accommodating part 22 , and the power assembly 50 is at least partially disposed in the accommodating cavity.
  • the bracket portion 23 is used to cover the chip removal device 10 and at least part of the bottom plate assembly 40 .
  • the switch assembly 30 can be installed on the housing 20 , for example, the switch assembly 30 is installed on the handle portion 21 , so that when the user holds the handle portion 21 , the switch assembly 30 can be activated relatively conveniently.
  • the power assembly 50 can be driven by the switch assembly 30 , the power assembly 50 includes a motor 51 , and the motor 51 serves as a prime mover of the sander 100 and is disposed in the casing 20 .
  • the motor 51 includes a motor shaft 52 for outputting power, and the motor shaft 52 rotates around the motor axis 101 .
  • the motor axis 101 extends substantially in the up-down direction.
  • the chip removal device 10 includes an airflow element 11 that can be driven by the motor 51, that is, the airflow element 11 can be driven by the motor 51 to rotate around the central axis 102, and can generate an airflow for chip removal when the airflow element 11 rotates.
  • the central axis 102 extends substantially in the up-down direction.
  • the eccentric element 60 surrounds the motor shaft 52 and the eccentric element 60 is arranged eccentrically with respect to the motor shaft 52 .
  • the eccentric element 60 is installed on the motor shaft 52 and is fixedly connected with the motor shaft 52.
  • the eccentric arrangement of the eccentric element 60 and the motor shaft 52 means that the eccentric element 60 has an axis parallel to the motor axis 101 of the motor shaft 52 with a distance d between them. The existence of the distance d makes it possible for the eccentric element 60 to transfer the rotation of the motor shaft 52 to the rotation and revolution of other components connected with the eccentric element 60 when the motor shaft 52 rotates.
  • the axis of the eccentric element 60 substantially coincides with the central axis 102 .
  • the motor shaft 52 can drive the bottom plate assembly 40 so that the bottom plate assembly 40 can swing relative to the casing 20 .
  • the bottom plate assembly 40 is fixedly connected with the eccentric element 60 , that is to say, the motor shaft 52 transmits power to the bottom plate assembly 40 through the eccentric element 60 .
  • the bottom plate assembly 40 includes a bottom plate provided with a through hole, the bottom plate includes an upper surface and a lower surface oppositely arranged, the through hole runs through the upper surface and the lower surface, and the lower surface is arranged on a side away from the eccentric element 60 relative to the upper surface, wherein the lower surface It is used to install functional elements such as sandpaper, and several through holes are provided on the lower surface.
  • the bottom plate can move eccentrically.
  • the sandpaper can continuously rub on the surface of the workpiece to be ground, thereby realizing the functions of grinding and polishing the workpiece to be ground.
  • the energy source 70 is used to provide an energy source for the sander 100, and the energy source 70 can be AC or DC, such as a portable mobile power source such as a battery pack.
  • the chip removal device 10 also includes a chip removal housing 12 , which is fixedly connected or integrally formed with the housing 20 .
  • the chip removal housing 12 is configured to accommodate the air flow element 11 , that is, the inner wall of the chip removal housing 12 forms a first space 110 for accommodating the air flow element 11 .
  • the inner wall of the chip removal housing 12 is also formed with a guide channel 13 for guiding the chip removal airflow.
  • the housing 20 forms the chip removal housing 12 described above.
  • the motor shaft 52 drives the airflow element 11 to rotate around the central axis 102 along the preset direction of rotation 103, and the airflow element 11 generates negative pressure during the rotation to suck the air on the lower surface into the first through hole.
  • the rotating airflow element 11 throws the inhaled airflow out along the outer periphery of the airflow element 11.
  • the guide channel 13 formed by the chip removal housing 12 guides the flow direction of the chip-carrying airflow and guides the airflow to a predetermined position.
  • An air outlet 14 is provided at a predetermined position for discharging the airflow carrying debris out of the first space 110 .
  • the preset rotation direction 103 refers to the direction in which the airflow element 11 rotates when the motor 51 drives the airflow element 11 to rotate.
  • the preset rotation direction 103 is now defined as shown in the figure 2 shows the first direction.
  • the chip removal housing 12 includes a first housing part 121 and a second housing part 122, and the first housing part 121 and the second housing part 122 are detachable and fixedly connected, that is, the first space 110 is formed by the first The housing part 121 and the second housing part 122 are formed after being fixedly connected.
  • the connection between the first housing part 121 and the second housing part 122 It can be fixedly connected by a fixing piece 123, wherein the fixing piece 123 used for fixing is arranged outside the first space 110, that is to say, the fixing piece 123 is not arranged in the guide channel 13, so that the fixing piece 123 can be prevented from being arranged in the guide channel 13.
  • the guide passage 13 affects the flow of the chip removal airflow, which further increases the dust suction resistance of the sander 100 and affects the dust suction effect.
  • the inner wall of the chip removal housing 12 is formed with a guide wall 124 for guiding the flow of the chip removal airflow, and an upper side wall 125 and a lower side wall 126 oppositely disposed along the direction of the central axis 102 .
  • the guide wall 124 is provided between the upper side wall 125 and the lower side wall 126 , and the guide wall 124 connects the upper side wall 125 and the lower side wall 126 , the guide wall 124 is provided in the circumferential direction of the airflow element 11 .
  • the guide wall 124 , the upper side wall 125 and the lower side wall 126 basically form the above-mentioned guide channel 13 .
  • the air flow element 11 has a rotation plane P when rotating around the central axis 102 , the upper sidewall 125 is located in the above rotation plane P, and the central axis 102 is perpendicular to the rotation plane P.
  • the guide wall 124, the upper side wall 125 and the lower side wall 126 referred to in this application form the above-mentioned guide passage 13, and are not strictly limited to the guide passage 13 being only composed of the guide wall 124, the upper side wall 125 and the lower side. Wall 126, but allows the part of the guide channel 13 to be formed by other components, but the guide part of the guide channel 13 mainly to realize the chip removal airflow is composed of the guide wall 124, the upper side wall 125 and the lower side wall 126.
  • the distance from the guide wall 124 to the central axis 102 is defined as the first distance D1, wherein the first distance D1 gradually increases along the preset rotation direction 103, that is, along the preset In the rotation direction 103, the distance between the guide wall 124 and the central axis 102 gradually increases, that is, the guide channel 13 gradually increases along the preset rotation direction 103, that is to say, in the direction along the rotation plane P, the upper side wall 125
  • the width on the preset direction of rotation 103 gradually increases, so that the dust suction resistance is reduced when the chip discharge airflow flows along the guide channel 13, the dust suction performance is improved, and the energy of the sander 100 is reduced during operation. consumption, thereby prolonging the working time of the sander 100.
  • the gradual increase here refers to an increase according to a certain law, which may be a linear law or a nonlinear law.
  • the airflow element 11 has the most distal end 111, wherein the most distal end 111 refers to the end of the airflow element 11 farthest from the central axis 102 in the direction of the rotation plane P, wherein, in the absence of external force , the farthest end 111 of the airflow element 11 will form a circle in the process of rotating around the central axis 102 along the preset rotation direction 103, wherein the distance from the guide wall 124 to the above-mentioned circle is defined as the second distance D2, along the rotation plane P In the direction of , the second distance D2 gradually increases along the preset rotation direction 103 .
  • the air flow elements 11 are not necessarily regular, that is to say, there is at least one element at the most distal end 111 .
  • the outer periphery of the airflow element 11 is approximately triangular (as shown in Figure 8), and as another embodiment, the outer periphery of the airflow element 11 is approximately rectangular (as shown in Figure 7), of course in In some other embodiments, the outer periphery of the air flow element 11 is approximately polygonal.
  • the outer periphery of the airflow element 11 is approximately circular, that is, the distance from the outer periphery of the airflow element 11 to the central axis 102 in the direction along the rotation plane P is basically the same, that is, it can be understood that the airflow element 11 is
  • the radius of the circle formed during the rotation of the preset rotation direction 103 and the circle formed by the outer periphery of the airflow element 11 are basically the same, that is to say, the distance from the inner wall of the chip removal housing 12 to the outer periphery of the airflow element 11 is along the The preset rotation direction 103 increases gradually.
  • the air flow element 11 may be a centrifugal fan 15 .
  • An air outlet 14 is formed on the first casing part 121 or the second casing part 122 .
  • the air outlet 14 is used to discharge the airflow in the guide passage 13 out of the first space 110 , and the air outlet 14 is formed by the guide wall 124 and the upper side wall 125 .
  • the ratio of the width of the air outlet 14 to the radius of the airflow element 11 is greater than or equal to 1, and less than or equal to 1.5. Under other conditions unchanged, the larger the radius of the airflow element 11, the greater the The greater the air volume of the chip removal airflow generated, the dust collection efficiency of the sander 100 can be improved, that is, the greater the radius of the airflow element 11 within the same time unit, the higher the dust collection efficiency of the sander 100 .
  • the width of the air outlet 14 is greater than or equal to 40mm and less than or equal to 65mm.
  • the width of the air outlet 14 refers to the farthest distance between the side walls of the above-mentioned air outlet 14 along the rotation plane P and perpendicular to the central axis 102 (that is, as shown in FIG. 4 ). L shown).
  • the ratio of the width of the air outlet 14 to the radius of the airflow element 11 is greater than or equal to 1.1 and less than or equal to 1.3, and the ratio of the width of the air outlet 14 to the radius of the airflow element 11 is set within the above range, which can make the sander 100 has high dust collection efficiency, and can ensure that the projected area of guide channel 13 of sander 100 on the rotation plane P is too large, so that the overall size of sander 100 is too large and inconvenient to operate.
  • the inner wall of the chip removal housing 12 includes at least one structural section 127 that satisfies the Archimedes spiral equation, that is, at least one section of the inner wall of the guide channel 13 extends in a direction that satisfies the Archimedes spiral equation.
  • the inside of the guide passage 13 can be formed by connecting multiple structural segments 127 satisfying different laws (as shown in Figure 7 and Figure 8), where the different laws can be linear or nonlinear, or multiple A structure section 127 may include linear laws and nonlinear laws at the same time.
  • the inner wall of the guide channel 13 extends in the form of an Archimedes spiral, and its extension direction all satisfies the Archimedes spiral equation.
  • the distance from the central axis 102 to the first end 141 is greater than or equal to 40 mm and less than or equal to 60 mm, and the value corresponding to the increment of the inner wall along the preset rotation direction 103 per unit angle is greater than 1.3 mm and less than 1.8 mm, that is, a1 is greater than or equal to Equal to 40mm and less than or equal to 60mm, b1 greater than 1.3mm and less than 1.8mm.
  • the above-mentioned width of the air outlet 14 can also be said to be the distance L between the first end 141 and the second end 142 .
  • the distance D>a1+b1 ⁇ from the fixed part 123 to the central axis 102 that is to say, the fixed part 123 is set on the guideline surrounded by the polar coordinate equation of the Archimedes spiral.
  • the outer side of the channel 13 that is, the mounting position for mounting and fixing is also arranged on the outer side of the guide channel 13 .
  • the distance from the lower sidewall 126 to the upper sidewall 125 is defined as a third distance D3, and the third distance D3 gradually increases along the preset rotation direction, that is, Along the preset rotation direction 103, the distance from the lower side wall 126 to the upper side wall 125 gradually increases, that is, the volume of the guide channel 13 gradually increases along the preset rotation direction 103, that is to say, along the preset rotation direction 103, the height from the upper side wall 125 to the lower side wall 126 gradually increases, so that the dust removal airflow reduces the dust suction resistance when it flows along the guide channel 13, improves the dust suction performance, and reduces the sander 100.
  • the energy consumption during operation further prolongs the working time of the sander 100 .
  • the gradual increase refers to an increase according to a certain law, which may be a linear law or a nonlinear law.
  • the upper side wall 125 includes at least one connecting section 129 that satisfies the direction of the Archimedes spiral, that is to say, the upper side wall can be formed by connecting a plurality of connecting sections 129 satisfying different laws, wherein the different laws can be linear or It may be a nonlinear law, or multiple structural segments 127 may include linear laws and nonlinear laws at the same time.
  • the distance from the upper sidewall 125 to the lower sidewall 126 of the first end 141 is greater than or equal to 6 mm and less than or equal to 10 mm, and the distance from the upper sidewall 125 to the lower sidewall 126 is increased by a unit angle along the preset rotation direction 103
  • the corresponding increased value is greater than 0.5mm and less than 2mm, that is, a3 is greater than or equal to 6mm and less than or equal to 10mm, and b3 is greater than 0.5mm and less than 2mm.
  • the inner wall of the chip removal channel 13 gradually extends outward from the first end 141
  • the upper sidewall 125 gradually extends upward from the first end 141 .
  • the working time of the sander 100 is defined as the function time T of the sander 100 under the energy consumed by the battery pack of 10WH, the function time N of the motor 51 at no load and the function of the sander 100
  • the product of time T is greater than or equal to 63000rpm.min and less than or equal to 120000rpm.min.
  • the product of the no-load speed N of the motor 51 and the function time T of the sander 100 is greater than or equal to 70000rpm.min, and is less than or equal to 115000rpm.min, and in other embodiments, the product of the no-load speed N of the motor 51 and the function time T of the sander 100 is greater than or equal to 77000rpm.min and less than or equal to 110000rpm.min. In this embodiment, the function time T of the sander 100 is greater than or equal to 7 minutes and less than or equal to 11 minutes.
  • the sander 100 also includes a balance weight 80, which is used to realize the double balance of mass balance and torque balance of the bottom plate.
  • the balance weight 80 is located at Between the fan 15 and the bottom plate, the balance weight 80 and the eccentric element 60 are detachably fixedly connected, that is to say, synchronous movement is formed between the eccentric element 60 and the balance weight 80 , and the balance weight 80 can rotate around the axis with the eccentric element 60 .
  • the center of mass of the balance weight 80 is arranged close to the bottom plate, and the center of mass of the balance weight 80 is reduced.
  • the distance to the bottom plate reduces the torque between the two, so that the balance weight 80 can reduce the weight used to balance the torque.
  • the weight of the balance weight 80 can be greatly reduced, thereby reducing the weight of the sanding machine 100, which is convenient for the user to operate, reduces the weight of the whole machine, reduces the fatigue of the user, and can also reduce the energy of the sanding machine 100 loss.
  • the eccentric element 60 is integrally formed with the centrifugal fan 15 , that is, the eccentric element 60 is formed on the centrifugal fan 15 .
  • the centrifugal fan 15 is installed on the motor shaft 52 and can be driven by the motor shaft 52 to rotate.
  • the centrifugal fan 15 is the eccentric element 60 .
  • the centrifugal fan 15 adopts a material with a density less than 6.5g/ cm3 , because the weight is directly proportional to the density, that is, the smaller the density, the smaller the weight of the centrifugal fan 15, which effectively reduces the weight of the centrifugal fan 15, thereby reducing the weight of the centrifugal fan 15.
  • the weight of the small sander 100 is the weight of the small sander 100.
  • the centrifugal fan 15 when the centrifugal fan 15 is made of a material with a density greater than or equal to 1 g/cm 3 and less than or equal to 3 g/cm 3 , the weight of the centrifugal fan 15 can be reduced while satisfying the structural strength.
  • the centrifugal fan 15 made of aluminum material can be used, which can save cost while reducing the weight of the centrifugal fan 15 .
  • the centrifugal fan 15 when the motor 51 drives the centrifugal fan 15 to rotate, the centrifugal fan 15 will generate a moment of inertia, that is to say, when the centrifugal fan 15 rotates, a binding force will be formed to keep the centrifugal fan 15 rotating around the motor axis 101 .
  • the binding force will constrain the sander 100 to continue to rotate around the up and down direction when the sander 100 has a tendency to move in a direction obliquely intersecting with the up and down direction, that is to say, the user exerts a force on the sander 100
  • the binding force will make the sander 100 have a tendency to move in the opposite direction along the movement direction of the sander 100, which requires the user to apply more force , to overcome the binding force, thereby causing inconvenience in operation, and such operation for a long time will easily cause fatigue to the user and affect work efficiency.
  • the moment of inertia is proportional to the weight of the centrifugal fan 15.
  • the moment of inertia is greater and the impact on the user is also greater. Therefore, through the above settings, the moment of inertia can be reduced, thereby improving the user's safety. sense of experience.
  • the ratio range of the product of the weight of the centrifugal fan 15 and the square of the outer diameter of the centrifugal fan 15 is greater than or equal to 3000g.mm 2 and less than or equal to 10000g.mm 2 .
  • the outer diameter refers to the radius of the outer edge 159 of the centrifugal fan 15 .
  • the total weight of the centrifugal fan 15 and the motor 51 is less than or equal to 400g.
  • the weight of the motor 51 and the centrifugal fan 15 is relatively heavy compared to the weight of other components, that is to say, the weight of the sander 100 is mainly concentrated on the motor 51 and the centrifugal fan 15.
  • the weight of the centrifugal fan 15 is greatly reduced, thereby obtaining a sander 100 with a smaller moment of inertia and a lighter weight, and can also reduce sanding.
  • the energy consumption of the sanding machine 100 is reduced, and the working hours of the sanding machine 100 are extended.
  • the weight of the centrifugal fan 15 is less than or equal to 100g, in some other embodiments, the weight of the centrifugal fan 15 is less than or equal to 80g, and in some other embodiments, the weight of the centrifugal fan 15 is less than or equal to 60g.
  • the centrifugal fan 15 may be of a backward tilting type.
  • the centrifugal fan 15 includes a chassis 151 and a plurality of fan blades 152 substantially perpendicular to the surface of the chassis 151 , along the central axis 102 , the fan blades 152 are disposed below the chassis 151 and close to the bottom plate.
  • the chassis 151 can rotate around the central axis 102.
  • the chassis 151 is connected to the motor shaft 52 of the motor 51, and the motor shaft 52 can drive the chassis 151 to rotate.
  • a plurality of fan blades 152 are evenly distributed around the central axis 102.
  • the fan blades 152 are formed by The central axis 102 is formed to extend outward, and in the direction along the central axis 102 , the vane portion 152 extends from the chassis 151 to a direction close to the bottom plate.
  • the plurality of fan blades 152 are fixedly connected or integrally formed with the chassis 151 , and in this embodiment, the plurality of fan blades 152 and the chassis 151 are integrally formed as one part.
  • the vane portion 152 extends along a curve, wherein the direction of the curve is opposite to the preset rotation direction 103 of the centrifugal fan 15 , that is, the vane portion 152 extends along a second direction opposite to the first direction.
  • the centrifugal fan 15 includes at least three blades 152 .
  • Each blade part 152 has an inner concave surface that is concave toward the inside of the blade part 152 and an outer convex surface that protrudes toward the outside of the blade part 152 .
  • Each blade portion 152 has a first blade surface 153 and a second blade surface 154 , the first blade surface 153 corresponds to an outer convex surface, and the second blade surface 154 corresponds to an inner concave surface.
  • the first wind blade surface 153 and the second wind blade surface 154 are substantially perpendicular to the rotation plane P. In the preset rotation direction 103, the first wind blade surface 153 is arranged on the front side of the second wind blade surface 154.
  • the surface 153 and the second blade surface 154 are formed with a front edge 155 and a rear edge 156 which are oppositely arranged. Centerline axis setting.
  • the distance from the front edge 155 to the central axis 102 is equal to the distance from the outer edge 159 of the bottom plate to the central axis 102.
  • the front edge 155 is at least partially in contact with the outer edge 159 of the chassis 151. It should be noted here Yes, the equality mentioned here is not strictly limited to the distance from the front edge 155 to the central axis 102 and the distance from the outer edge 159 of the chassis 151 to the central axis.
  • the distance from the edge 155 to the central axis 102 is equal to the distance from the outer edge 159 of the bottom plate to the central axis 102 .
  • the distance is less than the distance from the outer edge 159 of the bottom plate to the central axis 102 .
  • the distance from the front edge 155 to the central axis 102 is greater than the distance from the outer edge 159 of the chassis 151 to the central axis 102, that is, in the axial direction along the chassis 151, the vane portion 152 protrudes beyond the Chassis 151.
  • a coordinate system is established with a certain point on the central axis 102 as the original center, and the direction connecting the central axis 102 to the axis is the X axis, so as to be perpendicular to the central axis 102 to the axis.
  • the direction of the connecting line is the Y axis
  • the projection of the first blade surface 153 of the blade part 152 in the plane formed by the X axis and the Y axis is defined as the first projection line 157
  • the second blade surface of the blade part 152 The projection of 154 in the plane formed by the X axis and the Y axis is defined as the second projection line 158
  • the first projection line 157 and the second projection line 158 are arc lines in the plane formed by the X axis and the Y axis.
  • the first projection line 157 can be a smooth arc segment, or can be formed by connecting several smooth arc segments.
  • first projection line 157 is not limited here.
  • the curvature of the second projection line 158 that is to say, the first projection line 157 and the second projection line 158 may be formed in the same or different manner. The above setting makes the bending transition between the first wind blade surface 153 and the second wind blade surface 154 relatively uniform and relatively smooth as a whole. During the rotation of the chassis 151, the resistance encountered by the chip discharge airflow passing through the wind blade portion 152 will decrease. It is greatly reduced, which improves the air output of the centrifugal fan 15 when it is rotating, and also reduces the noise during operation.
  • the tangent of the first projection line 157 farthest from the central axis 102 is defined as a first tangent 1571
  • the tangent of the intersection of the outer edge 159 of the chassis 151 and the first projection line 157 is defined as a second tangent 1581 .
  • the angle ⁇ between the first tangent line 1571 and the second tangent line 1581 is not less than or equal to 20 degrees and less than or equal to 45 degrees.
  • the included angle between the first tangent line 1571 and the second tangent line 1581 within the above-mentioned range can significantly optimize the air output of the centrifugal fan 15 and the effect of suppressing noise, that is, setting the included angle within the above-mentioned range , the dust collection effect of the sander 100 can be further optimized, and the noise can be reduced at the same time, thereby improving the experience of the user.
  • the angle ⁇ between the first tangent line 1571 and the second tangent line 1581 is greater than or equal to 30 degrees and less than or equal to 40 degrees, which can make the above effect better.
  • the endpoint of the first projection line 157 near the outer edge 159 of the chassis 151 is defined as A
  • the endpoint of the first projection line 157 near the central axis 102 is defined as B
  • the second projection The end point of the line 158 near the outer edge 159 of the chassis 151 is defined as C
  • the end point of the second projection line 158 near the central axis 102 is defined as D
  • the first projection line 157 is substantially parallel to the second projection line 158 That is to say, the distance L1 between the end point A and the end point B of the first projection line 157 is substantially equal to the distance L2 between the end point C and the end point D of the second projection line 158 .
  • the ratio of the radius of the centrifugal fan 15 to the distance L1 between the end point A and the end point B of the first projection line 157 is greater than or equal to 4, and less than or equal to 7.5, the ratio is set within the above range, so that the centrifugal fan 15 meets While having sufficient dust collection effect, the weight of the fan can be reduced, thereby reducing the energy consumption of the whole machine and prolonging the working hours of the sander 100 .
  • the ratio of the radius of the centrifugal fan 15 to the distance between the end point A and the end point B of the first projection line 157 is greater than or equal to 4.5 and less than or equal to 6.5, the effect is better.
  • the distance L1 between the end point A and the end point B of the first projection line 157 is greater than or equal to 5 mm and less than or equal to 11 mm.

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Abstract

一种砂光机，包括：气流元件（11）、电机（51）和电池包，气流元件（11）可绕中心轴线（102）沿预设旋向转动以产生排屑气流；电机（51）向气流元件（11）提供动力；电池包向电机（51）提供能量；将砂光机处于空载状态、在电池包消耗10WH的能量下砂光机的工作时长定义为砂光机的功能时间T：电机空载转速N与砂光机的功能时间T的乘积大于或等于63000rpm.min，且小于或等于120000rpm.min。砂光机的吸尘阻力小且续航时间长。

Description

砂光机
本申请要求在2021年10月13日提交中国专利局、申请号为202111192829.2的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种砂光机。
背景技术
砂光机是一种用于进行打磨作业的电动工具，其常用于打磨不平整或者厚度不均的墙面、桌面等，以获得目标光滑度的表面。砂光机又被称为砂带机、砂轮机或者抛光机等，手持式砂光机是砂光机中的重要分类，其因小巧、易携带等优点被广泛用于各行各业。
砂光机在进行打磨作业时会产生粉尘，粉尘可在被吸入砂光机外壳内部后朝特定方向排出，因此吸尘阻力越小，砂光机的集尘效率越高。
发明内容
本申请提供一种吸尘阻力小且续航时间长的砂光机。
本申请采用如下的技术方案：一种砂光机，包括：气流元件，可绕中心轴线沿预设旋向转动以产生排屑气流；电机，设置为向所述气流元件提供动力来源；电池包，设置为向所述电机提供能量来源；其中，响应于确定所述砂光机处于空载状态，在所述电池包消耗10WH的能量下所述砂光机的工作时长定义为所述砂光机的功能时间T；所述电机空载转速N与所述砂光机的功能时间T的乘积大于或等于63000rpm.min且小于或等于120000rpm.min。
一种砂光机，包括：气流元件，可绕中心轴线沿预设旋向转动以产生排屑气流；电机，设置为向气流元件提供动力来源；电池包，设置为向电机提供能量来源；壳体，被构造为容纳气流元件，并导向气流元件产生的排屑气流；壳体的背部形成有导向壁，导向壁至中心轴线的距离定义为第一距离，第一距离沿预设旋向逐渐增大；内壁在沿垂直于中心轴线的平面上包括第一端和第二端，导向壁连接第一端和第二端，第一端至中心轴线的距离大于或等于40mm，且小于或等于60mm。
一种砂光机，包括：气流元件，可绕中心轴线沿预设旋向转动以产生排屑气流；电机，设置为向气流元件提供动力来源；电池包，设置为向电机提供能量来源；壳体，被构造为容纳气流元件，并导向气流元件产生的排屑气流；壳体包括上侧壁和与上侧壁相对设置的下侧壁；下侧壁至上侧壁在沿中线轴线的方向上的距离定义为第三距离，第三距离在沿预设旋向上逐渐增大。
附图说明
图1是本申请砂光机的立体图；
图2是图1所示砂光机去除部分壳体的立体图；
图3是图1所示砂光机整机的平面图；
图4是图3所示砂光机沿A-A方向的剖视图；
图5是图3所示砂光机沿B-B方向的剖视图；
图6是图5所示砂光机剖视图的部分放大图；
图7是本申请中一种关于气流元件与排屑壳体结构截面的简化示意图；
图8是本申请中另一种关于气流元件与排屑壳体结构截面的简化示意图；
图9是图1所示砂光机中离心风扇的立体图；
图10是图9所示离心风扇的另一视角的立体图；
图11是图9所示离心风扇的平面图；
图12是图11所示离心风扇的部分放大图；
图13是图3中部分排屑壳体的立体示意图。
具体实施方式
以下结合附图和具体实施例对本申请作具体的介绍。
图1所示为带有排屑装置10的砂光机100，其可以驱动功能元件运动，该功能元件可以为砂纸，这样砂光机100就可以通过功能元件对多种材料的工件表面进行砂磨、光整等。砂光机100在磨削的过程中会产生大量的碎屑，而碎屑也会在磨削的过程中被吸入排屑装置10内，排屑装置10将碎屑排出至预设位置，用户可以在预设位置处安装集尘装置，将排屑装置10排出的碎屑排至集尘装置内，进而还能达到集尘的效果。因此在砂光机100上设置用于排屑的气流排屑装置10是极为必要的。同时需要说明的是，排屑装置10并不仅用于砂光机100上，也可以用于其他需要集尘和/或排屑的电动工具上，例如，排屑装置10可以与电动工具的一体，也可以与电动工具成分离的状态，即电动工具与排屑装置10分别为两个机器，在运行时两者进行配合，进而实现集尘和/或排屑的功能。
下文将以砂光机100为例进行描述，为了便于描述定义如图1所示的上、下、左、右、前、后。
如图1至图6所示，砂光机100包括：壳体20，开关组件30，底板组件40、动力组件50、排屑装置10、偏心元件60和能量源70。
其中，壳体20形成砂光机100的外形部分，壳体20至少形成有把手部21、容纳部22和支架部23。把手部21用于供用户握持，把手部21的一端与容纳部22连接，另一端可以用于连接外部电源线缆，也可以形成连接座用于安装电池包之类的便携式直流电源。容纳部22位于把手部21和支架部23之间，容纳部22内部形成容纳腔，动力组件50至少部分设置在容纳腔内。支架部23用于覆盖排屑装置10和至少部分底板组件40。
开关组件30可以安装在壳体20上，例如，开关组件30安装在把手部21上，这样设置，使用户握持在把手部21上时，能够相对方便的触发开关组件30。
动力组件50能够被开关组件30驱动，动力组件50包括电机51，电机51作为砂光机100的原动机，设置在壳体20内。电机51包括用于输出动力的电机轴52，电机轴52绕电机轴线101转动。在本实施例中，电机轴线101基本沿上下方向延伸。
排屑装置10包括能够被电机51驱动的气流元件11，即气流元件11能够被电机51驱动从而绕中心轴线102转动，在气流元件11转动时能产生用于排屑的气流，在本实施例中，中心轴线102基本沿上下方向延伸。
偏心元件60围绕电机轴52，且偏心元件60相对于电机轴52偏心设置。偏心元件60安 装至电机轴52上并与电机轴52固定连接。其中需要说明的是，偏心元件60与电机轴52偏心设置指的是，偏心元件60具有一个轴线，轴线与电机轴52的电机轴线101相互平行且两者之间还存在一个距离d。距离d的存在使得当电机轴52转动时，偏心元件60能够将电机轴52的自转传递成与偏心元件60连接的其他零部件的自转和公转。在本实施例中，偏心元件60的轴线与中心轴线102基本重合。
电机轴52能够驱动底板组件40，从而使底板组件40能够相对于壳体20摆动。例如，底板组件40与偏心元件60固定连接，也就是说电机轴52通过偏心元件60将动力传递至底板组件40。底板组件40包括设有通孔的底板，底板包括相对设置的上表面和下表面，通孔贯穿上表面和下表面，下表面相对于上表面设置在远离偏心元件60的一侧，其中下表面用于安装砂纸等功能元件，下表面上设有数个通孔。在电机轴52与偏心元件60的驱动下，底板能够做偏心运动。当底板做偏心运动时，砂纸能够在待磨工件的表面上不断的摩擦，从而实现对待磨工件的打磨、抛光等功能。
能量源70用于给砂光机100提供能量来源，能量源70可以是交流电，也可以是直流电如电池包等便携式移动电源。
排屑装置10还包括排屑壳体12，排屑壳体12与壳体20固定连接或者一体成型。排屑壳体12被构造为容纳气流元件11，即排屑壳体12的内壁形成有用于容纳气流元件11的第一空间110。排屑壳体12的内壁还形成有用于导向排屑气流的导向通道13。在本实施例中，壳体20形成上述的排屑壳体12。例如，砂光机100启动运行时，电机轴52驱动气流元件11绕中心轴线102沿预设旋向103转动，气流元件11在转动的过程中产生负压将下表面的空气通过通孔吸入第一空间110，此时旋转的气流元件11将吸入的气流沿气流元件11的外周边甩出，气流在流动时将砂纸磨削过程中产生的碎屑从通孔中吸入第一空间110内，排屑壳体12形成的导向通道13引导带有碎屑气流的流向，并将该气流导向至预设位置。预设位置处设有一出风口14，用于将带有碎屑的气流排出第一空间110。需要注意的是，在排屑装置10与电动工具分离设置的实施例中，排屑装置10的排屑壳体12与壳体20分离设置。其中需要说明的是，预设旋向103指的是当电机51驱动气流元件11转动时，气流元件11转动的方向，本申请为了便于描述清楚技术方案，现定义预设旋向103为如图2示的第一方向。
例如，排屑壳体12包括第一壳体部121和第二壳体部122，第一壳体部121与第二壳体部122可拆装是固定连接，即第一空间110由第一壳体部121和第二壳体部122固定连接后形成。因砂光机100运行时会产生强烈的震动，为了保证第一壳体部121和第二壳体部122之间连接的稳定性，第一壳体部121与第二壳体部122之间可以通过固定件123固定连接，其中，用于固定的固定件123设置在第一空间110外，也就是说，固定件123不设置在导向通道13内，这样设置，可以避免固定件123设置在导向通道13内，对排屑气流的流通产生影响，进而使砂光机100的吸尘阻力变大，影响吸尘效果。
排屑壳体12的内壁形成有用于引导排屑气流流向的导向壁124和沿中心轴线102方向相对设置的上侧壁125和下侧壁126。导向壁124设置在上侧壁125和下侧壁126之间，并且导向壁124连接上侧壁125和下侧壁126，导向壁124设置在气流元件11的周向方向上。其中，导向壁124、上侧壁125和下侧壁126基本形成上述导向通道13。气流元件11绕中心轴线102转动时具有一旋转平面P，上侧壁125位于上述旋转平面P内，中心轴线102垂直于旋转平面P。需要说明的是，本申请中所指的导向壁124、上侧壁125和下侧壁126形 成上述导向通道13，并非严格限制于导向通道13仅由导向壁124、上侧壁125和下侧壁126组成，而是允许导向通道13的部分由其他零部件形成，但是导向通道13主要实现排屑气流的导向部分由导向壁124、上侧壁125和下侧壁126组成。
在沿垂直于中心轴线102的方向上，定义导向壁124至中心轴线102的距离为第一距离D1，其中第一距离D1沿预设旋向103逐渐增大，也就是说，在沿预设旋向103上，导向壁124距离中心轴线102的距离逐渐增大，即导向通道13在沿预设旋向103上逐渐增大，也就是说在沿旋转平面P的方向上，上侧壁125在预设旋向103上的宽度逐渐增大，这样设置使排屑气流在沿导向通道13流通的时候吸尘阻力减小，改善了吸尘性能，减小砂光机100在运行时的能耗，进而延长砂光机100的工作时间。需要注意的是，此处的逐渐增大指的是按照一定规律增大，该规律可以是线性规律或者非线性规律。
气流元件11具有最远端111，其中最远端111指的是在旋转平面P的方向上，气流元件11距离中心轴线102最远距离最远的端部，其中，在无外力影响的情况下，气流元件11的最远端111在绕中心轴线102沿预设旋向103转动的过程中会形成一个圆，其中导向壁124至上述圆的距离定义为第二距离D2，在沿旋转平面P的方向上，第二距离D2沿预设旋向103上逐渐增大。需要注意的是，因气流元件11不一定是规则的，也就是说最远端111至少具有一个。作为一种实施方式，气流元件11的外周边近似呈三角性(如图8所示)，作为另一种实施方式，气流元件11的外周边近似呈矩形(如图7所示)，当然在一些其他实施方式中，气流元件11的外周边近似呈多边形。在本实施例中，气流元件11的外周边近似呈圆形，即气流元件11的外周边至中心轴线102在沿旋转平面P的方向上距离基本一致，即可以理解为，气流元件11在沿预设旋向103转动的过程中会形成的圆与气流元件11的外周边形成的圆两者的半径基本一致，也就是说，排屑壳体12的内壁至气流元件11外周边的距离沿预设旋向103逐渐增大。在本实施例中，气流元件11可以为离心风扇15。
第一壳体部121或第二壳体部122上形成有出风口14。出风口14用于将导向通道13内的气流排出第一空间110，出风口14由导向壁124与上侧壁125形成。在沿旋转平面P的方向上，出风口14的宽度与气流元件11半径的比值大于或等于1，且小于或等于1.5，在其他条件不变的情况下，气流元件11的半径越大，所产生的排屑气流的风量越大，从而能提高的砂光机100的吸尘效率，即在同一时间单位内，气流元件11的半径越大，砂光机100的吸尘效率越高。同样，在同等条件下，出风口14的宽度越大，同一时间的出风量越多，因此出风口14宽度越大，砂光机100集尘效率越高。通过将出风口14的宽度与气流元件11的半径的设置在上述范围内，便于第一空间110内的排屑气流排出。例如，在本实施例中，在沿旋转平面P内，出风口14的宽度大于或等于40mm，且小于或等于65mm。其中需要注意的是出风口14的宽度指的是，在沿旋转平面P且垂直于中心轴线102的方向上，形成上述出风口14的侧壁之间的最远距离(也就是如图4所示的L)。例如，出风口14的宽度与气流元件11半径的比值大于或等于1.1，且小于或等于1.3，将出风口14的宽度与气流元件11半径的比值设置在上述范围内，既能使砂光机100的集尘效率高，又能保证砂光机100的导向通道13在旋转平面P上的投影面积过大，从而使砂光机100整机尺寸过大，不便于操作。
在沿旋转平面P的方向上，排屑壳体12的内壁上至少包括一段满足阿基米德螺旋方程的结构段127，即导向通道13的内壁至少有一段延伸方向满足阿基米德螺旋方程，也可就 是说导向通道13的内部可以是多个满足不同规律的结构段127彼此连接形成(如图7、图8所示)，其中不同规律可以是线性规律也可以是非线性规律，或者多个结构段127中可以同时包括线性规律和非线性规律。例如，为了方便设计，便于制造，导向通道13的内壁呈以阿基米德螺旋线的形式延伸，其延伸方向均满足阿基米德螺旋方程，在本实施例中，定义形成出风口14的内壁两端为第一端141和第二端142，其中，连接第一端141和第二端142的导向壁124，其延伸方向满足阿基米德螺旋线的极坐标方程，其方程式为D1＝a1+b1θ，也可以说是，第一端141可以近似为阿基米德螺旋线的起点，第二端142可以近似为阿基米德螺旋线的终点，即排屑壳体12的内壁从第一端141沿预设旋向103等距增大。例如，中心轴线102至第一端141的距离大于或等于40mm，且小于或等于60mm，内壁沿预设旋向103每增加单位角度对应增加的数值大于1.3mm且小于1.8mm，即a1大于或等于40mm，且小于或等于60mm，b1大于1.3mm且小于1.8mm。需要注意的是，上述出风口14的宽度也可以说是，第一端141和第二端142之间的距离L。例如，在沿旋转平面P的方向上，固定件123至中心轴线102的距离D＞a1+b1θ，也就是说，固定件123设置在阿基米德螺旋线的极坐标方程所围成的导向通道13的外侧，即用于安装固定的安装位置也设置在导向通道13的外侧。这样设置，可以避免安装位置的设置会影响到导向壁124的延伸方向，进而出现安装位置影响气流导向的情况。
如图13所示，在沿中心轴线102的方向上，下侧壁126至上侧壁125的距离定义为第三距离D3，第三距离D3在沿预设旋向上逐渐增大，也就是说，在沿预设旋向103上，下侧壁126至上侧壁125的距离逐渐增大，即导向通道13的体积在沿预设旋向103上逐渐增大，也就是说在沿预设旋向103上，上侧壁125至下侧壁126的高度逐渐增大，这样设置使排屑气流在沿导向通道13流通的时候吸尘阻力减小，改善了吸尘性能，减小砂光机100在运行时的能耗，进而延长砂光机100的工作时间。需要注意的是，此处的逐渐增大指的是按照一定规律增大，该规律可以是线性规律或者非线性规律。
上侧壁125至少包括一段满足阿基米德螺旋线方向的连接段129，也可就是说上侧壁可以是多个满足不同规律的连接段129彼此连接形成，其中不同规律可以是线性规律也可以是非线性规律，或者多个结构段127中可以同时包括线性规律和非线性规律。例如，为了方便设计，便于制造，上侧壁125呈以阿基米德螺旋线的形式延伸，其延伸方向均满足阿基米德螺旋方程，即D3＝a3+b3θ，第一端141可以近似为阿基米德螺旋线的起点，即上侧壁125从第一端141处向上延伸，下侧壁126近似为垂直于中心轴线102的平面。例如，第一端141的上侧壁125至下侧壁126的距离大于或等于6mm，且小于或等于10mm，上侧壁125至下侧壁126的距离沿预设旋向103每增加单位角度对应增加的数值大于0.5mm且小于2mm，即a3大于或等于6mm，且小于或等于10mm，b3大于0.5mm且小于2mm。在本实施例中，排屑通道13的内壁从第一端141逐渐向外延伸，上侧壁125从第一端141处逐渐向上延伸。作为其他可行的实施方式，也可以仅是上侧壁125从第一端141处逐渐向上延伸，使排屑通道13的空间体积呈逐渐增加的趋势，减小排屑气流在排屑通道13内时的吸尘阻力，改善吸尘性能。
在砂光机100处于空载的状态时，电池包消耗10WH的能量下砂光机100的工作时长定义为砂光机100的功能时间T，电机51空载转速N与砂光机100的功能时间T的乘积大于或等于63000rpm.min，且小于或等于120000rpm.min，在一实施例中，电机51空载转速N 与砂光机100的功能时间T的乘积大于或等于70000rpm.min，且小于或等于115000rpm.min，在其他实施例中，电机51空载转速N与砂光机100的功能时间T的乘积大于或等于77000rpm.min，且小于或等于110000rpm.min。在本实施例中，砂光机100的功能时间T大于或等于7min，且小于或等于11min。
如图5至图6所示，砂光机100还包括平衡块80，平衡块80用于实现底板的质量平衡和扭矩平衡的双重平衡，在沿中心轴线102的方向上，平衡块80位于离心风扇15与底板之间，平衡块80与偏心元件60为可拆卸式固定连接，也就是说偏心元件60与平衡块80之间构成同步运动，且平衡块80能够随偏心元件60绕轴线转动。平衡块80与离心风扇15之间为两个单独的零部件，将平衡块80设置在离心风扇15的下侧，可以理解为，平衡块80的质心靠近底板设置，减小平衡块80的质心至底板的距离，减小了两者之间的扭矩，这样平衡块80就可以减少了用来平衡扭矩的重量。我们也可以理解为不需要设置其他的重量块来平衡扭矩，这样我们就可以避免为了配平其他的重量块，而在平衡块80上增加重量以用来配平其他重量块的情况。或者说只需要配置其他很轻的重量块就可以抵消扭矩，这样也只需要在平衡块80上格外配置与其他重量块重量一致的格外重量块即可，由此我们可知，通过上述设置，可以使平衡块80的重量能够大幅度的减小，进而减小了砂光机100的重量，方便用户操作，减轻了整机的重量，减少用户的疲劳感，同时还能减少砂光机100能量的损耗。
在本实施例中，偏心元件60与离心风扇15一体成型，即离心风扇15上形成有偏心元件60。离心风扇15安装在电机轴52上，并能被电机轴52驱动从而转动。当然也可以说，离心风扇15就是偏心元件60。例如，离心风扇15采用密度小于6.5g/cm 3的材料，因重量与密度成正比，即密度越小，离心风扇15的重量也越小，即有效的减轻了离心风扇15的重量，从而减小砂光机100的重量。例如，离心风扇15采用密度大于或等于1g/cm 3，小于或等于3g/cm 3的材料时，在满足结构强度的同时，又能减轻离心风扇15的重量。例如，可以采用铝材料制成的离心风扇15，在减轻离心风扇15重量的同时，又能节省成本。
需要注意的是，电机51驱动离心风扇15转动时，离心风扇15会产生转动惯量，也就是说离心风扇15转动时会形成使离心风扇15保持绕电机轴线101转动的约束力。该约束力会在砂光机100上有沿与上下方向倾斜相交的某一方向运动的趋势时约束砂光机100使其继续绕上下方向转动，也就是说用户对将砂光机100施加一个使砂光机100沿与上下方向倾斜相交的某一方向运动的力时，约束力会使砂光机100有沿砂光机100运动方向相反运动的趋势，这样就需要用户施加更多的力，以克服该约束力，从而造成操作不便，而且长时间这样操作，会使用户很容易产生疲劳感，影响工作效率。转动惯量与离心风扇15的重量成正比，当离心风扇15的重量越大时，转动惯量越大，对用户产生的影响也越大，因此通过上述设置，能够减小转动惯量，从而提高用户的体验感。
例如，离心风扇15的重量与离心风扇15外径的平方的乘积的比值范围大于或等于3000g.mm 2，且小于或等于10000g.mm 2。其中外径指的是离心风扇15的外边缘159的半径。通过将离心风扇15的重量与外径的平方的乘积的比值设置在上述范围内，则能有效的减小离心风扇15在转动时产生的转动惯量，减小用户操作时约束力的影响，进而提高工作效率。
例如，离心风扇15的重量与电机51重量的总重量小于或等于400g。砂光机100内部结构中，电机51、离心风扇15的重量相对于其他零部件的重量而言是比较重的，也就是说砂光机100的重量主要集中于电机51和离心风扇15。通过对平衡块80和离心风扇15的结构 以及位置的设置，使得离心风扇15的重量大大的降低，从而获得一个转动惯量较小的、重量较轻的砂光机100，而且还能降低砂光机100的能耗，延长砂光机100的工作时长。在一些实施例中，离心风扇15的重量小于或等于100g，在一些其他实施例中，离心风扇15的重量小于或等于80g，在另一些实施例中，离心风扇15的重量小于或等于60g。
如图9-图12所示，离心风扇15可以为后倾式。离心风扇15包括底盘151和多个基本垂直于底盘151表面的风叶部152，在沿中心轴线102的方向上，风叶部152设置在底盘151的下方，靠近底板处。底盘151能够绕中心轴线102转动，底盘151与电机51的电机轴52相连，且电机轴52能够驱动底盘151转动，多个风叶部152均匀围绕中心轴线102分布，例如，风叶部152由中心轴线102向外延伸形成，在沿中心轴线102的方向上，风叶部152由底盘151向靠近底板方向延伸。多个风叶部152与底盘151固定连接或者一体成型，在本实施例中，多个风叶部152与底盘151一体成型为一个零件。风叶部152沿一曲线延伸，其中曲线延伸方向与离心风扇15的预设旋向103相反，即风叶部152沿与第一方向相反方向的第二方向延伸。需要说明的是，离心风扇15至少包括三个以上的风叶部152。
每个风叶部152均具有朝向风叶部152内部凹陷的内凹面和朝向风叶部152外部凸出的外凸面。每个风叶部152均有第一风叶面153和第二风叶面154，第一风叶面153对应外凸面，第二风叶面154对应内凹面。第一风叶面153与第二风叶面154基本垂直于旋转平面P，在预设旋向103上，第一风叶面153设置在第二风叶面154的前侧，第一风叶面153与第二风叶面154形成有相对的设置的前边缘155和后边缘156，在沿旋转平面P的方向上，前边缘155相对于后边缘156远离中心轴线102，即后边缘156靠近中线轴线设置。前边缘155至中心轴线102的距离与底板的外边缘159至中心轴线102的距离相等，在本实施例中，可以理解为前边缘155与底盘151的外边缘159至少部分接触，这里需要注意的是，这里说的相等并非严格限制于前边缘155至中心轴线102的距离与底盘151的外边缘159至中线轴线的距离完全相等，而是只要在误差允许的范围之内均可以为理解为前边缘155至中心轴线102的距离与底板的外边缘159至中心轴线102的距离相等。当然在其他实施例中，我们并不完全限定前边缘155与底盘151的外边缘159一定要接触，前边缘155可以与底盘151的外边缘159可以不接触，即存在前边缘155至中心轴线102的距离小于底板的外边缘159至中心轴线102的距离。当然在另一些事实例中，在前边缘155至中心轴线102的距离大于底盘151的外边缘159至中心轴线102的距离，即在沿底盘151的轴向方向上，风叶部152凸出于底盘151。
为了阐述离心风扇15的具体结构，在此定义，以中心轴线102上的某一点为原心建立坐标系，以中心轴线102至轴线的连接的方向为X轴，以垂直于中心轴线102至轴线的连线方向为Y轴，风叶部152的第一风叶面153在X轴与Y轴所构成的平面内的投影定义为第一投影线157，风叶部152的第二风叶面154在X轴与Y轴所构成的平面内的投影定义为第二投影线158，第一投影线157与第二投影线158在X轴与Y轴所构成的平面内均为圆弧线。例如，第一投影线157可以是一段光滑的圆弧段，也可以是由数段光滑的圆弧段连接形成，圆弧段与圆弧段之间弯曲过渡比较均匀，同样第二投影线158可以是一段光滑的圆弧段，也可以是由数段光滑的圆弧段连接形成，圆弧段与圆弧段之间光滑连接，需要注意的是，在此并不限制第一投影线157与第二投影线158弯曲的弧度，也就是说，第一投影线157与第二投影线158的形成方式可以相同也可以不同。上述设置，使第一风叶面153和第二风叶面 154的弯曲过渡比较均匀、整体比较光滑，在底盘151转动的过程中，排屑气流划过风叶部152所遇到的阻力会大大减小，提高了离心风扇15在转动时的出风量、同时还降低了运行时的噪音。
第一投影线157距离中心轴线102最远处的切线定义为第一切线1571，底盘151的外边缘159与第一投影线157相交处的切线定义为第二切线1581。其中第一切线1571与第二切线1581的夹角α于或等于20度，且小于或等于45度。将第一切线1571与第二切线1581的夹角设置在上述范围之内，可以使离心风扇15的出风量和抑制噪音的效果明显得到优化，也就是说，将夹角设置在上述范围内，可以进一步地优化砂光机100即的集尘效果，同时还能降低噪音，进而提高用户的体验感。例如，第一切线1571与第二切线1581的夹角α大于或等于30度，且小于或等于40度，可以使上述效果更好。在X轴与Y轴所构成的平面内，第一投影线157靠近底盘151外边缘159处的端点定义为A，第一投影线157靠近中心轴线102处的端点定义为B，同样第二投影线158靠近底盘151外边缘159处的端点定义为C，第二投影线158靠近中心轴线102处的端点定义为D，因在本申请中，第一投影线157与第二投影线158基本平行设置，也就是说，第一投影线157的端点A至端点B之间的距离L1与第二投影线158的端点C至端点D之间的距离L2基本相等。其中离心风扇15的半径与第一投影线157的端点A至端点B之间的距离L1的比值大于或等于4，且小于或等于7.5，将比值设置在上述范围内，使离心风扇15在满足足够的吸尘效果的同时，还能减轻风扇的重量，进而降低整机的能耗，延长砂光机100的工作时长。例如，离心风扇15的半径与第一投影线157的端点A至端点B之间的距离的比值大于或等于4.5，且小于或等于6.5，效果更好。第一投影线157的端点A至端点B之间的距离L1大于或等于5mm，且小于或等于11mm。

Claims (15)

  1. 一种砂光机，包括：
    气流元件，可绕中心轴线沿预设旋向转动以产生排屑气流；
    电机，设置为向所述气流元件提供动力来源；
    电池包，设置为向所述电机提供能量来源；
    其中，响应于确定所述砂光机处于空载状态，在所述电池包消耗10WH的能量下所述砂光机的工作时长定义为所述砂光机的功能时间T；
    所述电机空载转速N与所述砂光机的功能时间T的乘积大于或等于63000rpm.min，且小于或等于120000rpm.min。
  2. 根据权利要求1所述的砂光机，其中，
    所述电机空载转速N与所述砂光机的功能时间T的乘积大于或等于77000rpm.min，且小于或等于110000rpm.min。
  3. 根据权利要求1所述的砂光机，还包括：
    壳体，被构造为容纳所述气流元件，并导向所述气流元件产生排屑气流，所述壳体包括上侧壁和与所述上侧壁相对设置的下侧壁；
    其中，所述下侧壁至所述上侧壁在沿所述中线轴线的方向上的距离定义为第三距离，所述第三距离在沿所述预设旋向上逐渐增大。
  4. 根据权利要求3所述的砂光机，其中，
    所述上侧壁包括至少一段满足阿基米德螺旋线方向的连接段。
  5. 根据权利要求4所述的砂光机，其中，
    所述壳体的内壁形成有导向壁，所述导向壁至所述中心轴线的距离定义为第一距离，所述第一距离沿所述预设旋向逐渐增大；
    所述内壁在沿垂直于所述中心轴线的平面上包括至少一段满足阿基米德螺旋线方程的结构段。
  6. 根据权利要求4所述的砂光机，其中，
    所述气流元件距离所述中心轴线的最远端，在所述气流元件绕所述中心轴线沿所述预设旋向转动的过程中形成一个圆；
    其中，所述壳体的内壁形成有导向壁，所述导向壁至所述圆的距离定义为第二距离，所述第二距离沿所述预设旋向逐渐增大；
    所述内壁在沿垂直于所述中心轴线的平面上包括至少一段满足阿基米德螺旋线方程的结构段。
  7. 根据权利要求4所述的砂光机，其中，
    所述气流元件包括：
    底盘，可绕所述中心轴线转动；
    多个风叶部，与所述底盘固定连接或者一体成型；
    所述风叶部沿一曲线延伸，所述曲线延伸方向与所述气流元件预设旋向相反。
  8. 根据权利要求7所述的砂光机，其中，
    所述气流元件包括：
    底盘，可绕所述中心轴线转动；
    多个风叶部，与所述底盘固定连接或者一体成型；
    所述风叶部定义有第一风叶面和第二风叶面，在沿所述预设旋向上，所述第一风叶面设置在所述第二风叶面的前侧；
    所述第一风叶面和所述第二风叶面相对的两端分别汇成前边缘和后边缘，所述前边缘相对于所述后边缘远离所述中心轴线；
    所述底盘的外边缘与所述前边缘至少部分接触。
  9. 根据权利要求8所述的砂光机，还包括：
    偏心元件，由所述电机驱动，所述偏心元件具有一个与所述中心轴线偏离设置的轴线；
    底板，可被所述电机驱动；
    其中，以所述中心轴线的上的某一点为原点建立坐标系，以所述中心轴线至所述轴线的连线的方向为X轴，以垂直于所述中心轴线至所述轴线的连线的方向为Y轴；
    所述第一风叶面在X轴与Y轴所构成的平面内的投影定义为第一投影线，所述第一投影线距离所述中心轴线最远处的切线定义为第一切线；
    在X轴与Y轴所述构成的平面内，所述底盘的外边缘与所述第一投影线相交处的切线定义为第二切线；
    所述第一切线与所述第二切线的夹角大于或等于20度，且小于或等于45度。
  10. 根据权利要求9述的砂光机，其中，
    在X轴与Y轴所述构成的平面内，所述第一投影线靠近所述底盘的外边缘处的端点定义为第一端点，所述第一投影线靠近所述中心轴线处的端点定义为第二端点，其中所述气流元件的半径与所述第一投影线的所述第一端点至所述第二端点之间的距离L1的比值大于或等于4，且小于或等于7.5。
  11. 一种砂光机，包括：
    气流元件，可绕中心轴线沿预设旋向转动以产生排屑气流；
    电机，设置为向所述气流元件提供动力来源；
    电池包，设置为向所述电机提供能量来源；
    壳体，被构造为容纳所述气流元件，并导向所述气流元件产生的排屑气流；
    其中，
    所述壳体的背部形成有导向壁，所述导向壁至所述中心轴线的距离定义为第一距离，所述第一距离沿所述预设旋向逐渐增大；
    所述内壁在沿垂直于所述中心轴线的平面上包括第一端和第二端，所述导向壁连接所述第一端和所述第二端，所述第一端至所述中心轴线的距离大于或等于40mm，且小于或等于60mm。
  12. 根据权利要求11所述的砂光机，其中，
    所述第一端和第二端设置为为排屑、排风的出风口；
    所述出风口在沿垂直于所述中心轴线的平面上的距离与所述中心轴线至所述气流元件最远端距离的比值大于或等于1，小于或等于1.5。
  13. 根据权利要求12所述的砂光机，其中，
    所述壳体包括上侧壁和与所述上侧壁相对设置的下侧壁；
    所述下侧壁至所述上侧壁在沿所述中线轴线的方向上的距离定义为第三距离，所述第三距离在沿所述预设旋向上逐渐增大；
    所述上侧壁包括至少一段满足阿基米德螺旋线方向的连接段。
  14. 根据权利要求11所述的砂光机，其中，
    所述气流元件的重量与所述气流元件外径的平方的乘积的范围大于或等于3000g.mm 2，小于或等于10000g.mm 2。
  15. 一种砂光机，包括：
    气流元件，可绕中心轴线沿预设旋向转动以产生排屑气流；
    电机，设置为向所述气流元件提供动力来源；
    电池包，设置为向所述电机提供能量来源；
    壳体，被构造为容纳所述气流元件，并导向所述气流元件产生的排屑气流；
    其中，
    所述壳体包括上侧壁和与所述上侧壁相对设置的下侧壁；
    所述下侧壁至所述上侧壁在沿所述中线轴线的方向上的距离定义为第三距离，所述第三距离在沿所述预设旋向上逐渐增大。
PCT/CN2022/118810 2021-10-13 2022-09-14 砂光机 WO2023061140A1 (zh)

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DE3607106A1 (de) * 1986-03-05 1987-09-10 Fabritius Hans Josef Staubabsaugvorrichtung fuer rotations-schleifgeraete
CN103862351A (zh) * 2012-12-13 2014-06-18 苏州宝时得电动工具有限公司 偏心旋转摆动类工具
CN107030608A (zh) * 2016-02-04 2017-08-11 南京德朔实业有限公司 砂光机
CN108527092A (zh) * 2017-03-06 2018-09-14 南京德朔实业有限公司 可双手操作的砂光机
CN207971792U (zh) * 2016-08-29 2018-10-16 布莱克和戴克公司 动力工具和砂光机
CN214124010U (zh) * 2020-12-24 2021-09-03 常州合力电器有限公司 一种用于砂光机的电池连接组件

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3607106A1 (de) * 1986-03-05 1987-09-10 Fabritius Hans Josef Staubabsaugvorrichtung fuer rotations-schleifgeraete
CN103862351A (zh) * 2012-12-13 2014-06-18 苏州宝时得电动工具有限公司 偏心旋转摆动类工具
CN107030608A (zh) * 2016-02-04 2017-08-11 南京德朔实业有限公司 砂光机
CN207971792U (zh) * 2016-08-29 2018-10-16 布莱克和戴克公司 动力工具和砂光机
CN108527092A (zh) * 2017-03-06 2018-09-14 南京德朔实业有限公司 可双手操作的砂光机
CN214124010U (zh) * 2020-12-24 2021-09-03 常州合力电器有限公司 一种用于砂光机的电池连接组件

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