WO2022242525A1 - 一种电动工具 - Google Patents

一种电动工具 Download PDF

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Publication number
WO2022242525A1
WO2022242525A1 PCT/CN2022/092223 CN2022092223W WO2022242525A1 WO 2022242525 A1 WO2022242525 A1 WO 2022242525A1 CN 2022092223 W CN2022092223 W CN 2022092223W WO 2022242525 A1 WO2022242525 A1 WO 2022242525A1
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WO
WIPO (PCT)
Prior art keywords
oil
filter
pot
motor
electric tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/092223
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English (en)
French (fr)
Inventor
于欣新
张林高
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Globe Jiangsu Co Ltd
Original Assignee
Globe Jiangsu Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Globe Jiangsu Co Ltd filed Critical Globe Jiangsu Co Ltd
Priority to EP22803847.7A priority Critical patent/EP4342284A4/en
Publication of WO2022242525A1 publication Critical patent/WO2022242525A1/zh
Priority to US18/505,120 priority patent/US20240075649A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/12—Lubricating devices specially designed for chain saws
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/08—Other tools for pruning, branching or delimbing standing trees
    • A01G3/085—Motor-driven saws for pruning or branching
    • A01G3/086—Chain saws

Definitions

  • the invention relates to the field of cutting tools, in particular to an electric tool.
  • Power tools usually need lubricating oil to lubricate the cutting parts, but because there is a lot of dust in the cutting environment, impurities around the tool will fall into the oil pot, and the oil pump will easily cause blockage inside the oil pump after the impurities are sucked in, resulting in the failure of the lubrication system of the power tool. Affect the service life of electric tools.
  • the present invention provides an electric tool to improve the problem of internal clogging of the oil pump of the oil storage device.
  • the present invention provides an electric tool, which includes a casing, a driving device, a cutting device and an oil storage device, the driving device is installed in the casing, the cutting device is installed in the casing and Driven by the driving device, the oil storage device is installed in the casing to provide lubricating oil to the cutting device;
  • the oil storage device includes an oil pot and an oil pump, the oil pot is connected to the oil pump through the first oil pipe, and the first oil pipe is connected to the oil pump.
  • a filtering structure is arranged between the oil pots for filtering the lubricating oil entering the oil pump from the oil pots, and the oil pots provide lubricating oil to the cutting device through the oil pump.
  • the oil pot is provided with an oil outlet connected to the first oil pipe.
  • the filter structure includes claws, a first filter body and a filter spring.
  • the claws are installed on the first oil pipe and the oil outlet of the oil pot.
  • the end connected to the mouth, the claw is provided with an oil inlet hole connected with the first oil pipe, the first filter body is installed in the claw, the filter spring is sleeved on the claw, and the first filter body is fixed in the claw .
  • the jaws include sequentially connected tubular parts, claw discs and claws, the outer diameter of the tubular part matches the inner diameter of the first oil pipe, the diameter of the claw discs is larger than the outer diameter of the first oil pipe, and the claw discs have An oil inlet hole communicated with the tubular part is provided, and claws are arranged at intervals along the circumferential direction of the claw plate to enclose an accommodating cavity of the first filter body.
  • the first filter body is a filter sponge.
  • the filter spring includes a cylindrical spring and a conical spring, the cylindrical spring is sleeved outside the claw, and the conical spring is blocked on the opening of the claw.
  • a leak-proof structure is provided at the position where the first oil pipe is connected to the oil outlet of the oil pot, and the leak-proof structure includes a cylindrical outer wall and first and second flanges arranged on both sides of the cylindrical outer wall.
  • the cylindrical outer wall fits on the outer wall of the first oil pipe and matches the oil outlet of the oil pot.
  • the first flange is located on the inner side of the oil outlet of the oil pot, and the second flange is located on the outside of the oil outlet of the oil pot. The first flanging and the second flanging are pressed and sealed on the surrounding walls of the oil outlet of the oil pot.
  • the outer side of the second flange is provided with a third flange connected thereto.
  • the filter structure includes a filter bracket and a second filter body, the second filter body is installed in the filter bracket, and the filter bracket is installed on the Inside the grease nipple.
  • the filter bracket includes a filter tube and a stopper arranged at one end of the filter tube, a through hole communicating with the filter tube is provided on the stopper part, the outer diameter of the filter tube matches the inner diameter of the oil nozzle, and the stopper part The outer diameter of the retaining portion is larger than that of the grease nipple.
  • a plurality of oil inlet holes are arranged on the side wall of the filter pipe in the circumferential direction, and the second filter bodies are distributed in the oil inlet holes.
  • the second filter body is a filter screen, and the filter bracket and the filter screen are in an integrated structure.
  • the inner diameter of the first oil pipe matches the outer diameter of the oil nozzle, and the first oil pipe is tightly sleeved on the oil nozzle.
  • the oil storage device further includes an oil pot cover
  • the oil pot cover includes a cover body, a chamber, a one-way ventilation structure and a pull wire
  • the cover body is threadedly connected with the oil inlet port of the oil pot
  • the chamber is arranged on the cover body.
  • the side of the chamber away from the oil pot is provided with an air inlet hole
  • the side facing the oil pot is provided with an air outlet hole
  • the one-way ventilation structure is installed in the chamber, and one end of the pull wire is connected to the On the cover body on one side of the chamber, the other end extends into the oil pot and is connected with the stop body that can enter the oil pot.
  • the one-way air-permeable structure includes a one-way air inlet valve and a third filter body, the one-way air inlet valve is installed in the chamber, and the third filter body is installed in the air inlet hole and blocked.
  • the stop body is an elastically deformable tapered bracket, and the size of the large end of the tapered bracket is larger than the diameter of the oil inlet of the oil pot.
  • a mounting hole for a pull wire is provided in the cover, and a spherical concave cavity is provided in the mounting hole, and a sphere matching the spherical concave cavity is provided at the end of the pull wire, and the pull wire is clamped in the spherical concave cavity through the sphere.
  • the third filter body is a copper powder sintered filter element.
  • a sealing ring is further provided in the cover body.
  • the driving device includes a driving motor, and the driving motor is a brushed motor or a brushless motor.
  • the casing includes a first casing, a second casing and a motor support pad, a plurality of first support ribs are arranged inside the first casing, and the inside of the second casing is connected to the first support ribs.
  • a plurality of second support ribs are set at the corresponding positions.
  • the side surface of the motor support pad in contact with the first support rib and the second support rib is provided with a washer groove for accommodating the support rib, and the side surface of the motor support pad in contact with the brushless motor is provided with The arc-shaped mating surface matches the brushless motor.
  • the motor support pad includes a first rubber pad installed on the first support rib and a second rubber pad installed on the second support rib, and the first rubber pad and the second rubber pad are installed correspondingly.
  • the side of the motor supporting pad facing away from the first supporting rib and the second supporting rib is provided with a slot for accommodating the housing pillar of the brushless motor.
  • the motor accommodating cavity includes a first cavity for accommodating a head of the motor, a second cavity for accommodating a main body of the motor, and a third cavity for accommodating an output end of the motor.
  • the first housing and the second housing are provided with windshields at positions corresponding to the motor accommodating cavity.
  • the motor supporting pad is detachably mounted on the supporting rib in the second chamber, and the motor supporting pad separates the windshield located in the first chamber from the windshield located in the third chamber.
  • the oil storage device of the electric tool of the present invention can effectively filter large particles of impurities in the lubricating oil entering the oil pump from the oil pot by installing a filter structure between the first oil pipe and the oil pot, thereby improving the clogging problem of the oil pump.
  • the present invention provides two different filter structures, one is installed at the end of the first oil pipe, and the impurities in the lubricating oil are filtered out by the double filter of the filter body and the filter spring, which avoids the clogging of the oil pump and enables it to Effectively lubricate the knife chain; the other is composed of a filter bracket and a filter screen.
  • the specification of the filter screen can be selected according to the working environment of the tool and the oil filter hole inside the oil pump.
  • This filter structure is small in size and can be used in small In the oil pot, it can also be used in irregular blow molding oil pots with oil nozzles, which can efficiently filter large particles in lubricating oil, avoid clogging the oil pump, and improve the service life of electric tools.
  • the oil storage device of the electric tool of the present invention also improves the structure of the oil pot cover.
  • a chamber is arranged inside the cover body. There is an air outlet hole, the air entering from the air inlet hole can only enter the oil pot through the air outlet hole of the chamber, and the area outside the chamber is a sealed structure to increase the sealing of the oil pot; in addition, a one-way ventilation structure is set in the chamber , it can allow the outside gas to enter the chamber, but it can prevent the liquid in the oil pot from overflowing from the one-way air-permeable structure. Loss and leakage pollution; the inside of the oil pot cover is equipped with an anti-loss pull wire, and the pull wire and the chamber are set at different positions to prevent oil from seeping out from the installation position of the pull wire.
  • a detachable motor support pad is arranged in the casing of the electric tool of the present invention, so that the same casing system can be compatible with brushed motors and brushless motors, and users can choose to install brushed motors or brushless motors according to individual needs.
  • the motor support pad separates the front air inlet of the brushless motor from the fan blades at the rear, so as to avoid affecting the heat dissipation of the motor due to turbulent wind and scattered wind, and improve the effective working time of the motor.
  • Fig. 1 is a schematic structural view of an electric tool of the present invention in an embodiment
  • Fig. 2 is a partial schematic diagram of the electric tool of the present invention after part of the casing is removed;
  • FIG. 3 is a schematic structural view of an oil storage device in an embodiment of the electric tool of the present invention.
  • Fig. 4 is the schematic diagram of filtering structure in Fig. 3;
  • Figure 5 is an exploded schematic view of the filter structure in Figure 3;
  • Fig. 6 is a schematic structural view of the oil pot in Fig. 4;
  • Fig. 7 is a schematic structural view of the claw in Fig. 5;
  • Fig. 8 is a schematic structural view of the jaws and the first filter body in Fig. 5;
  • Fig. 9 is a schematic structural view of the filter spring in Fig. 5;
  • Fig. 10 is a schematic structural view of the first oil pipe in Fig. 5;
  • Fig. 11 is a schematic structural view of an oil storage device in another embodiment of the electric tool of the present invention.
  • Figure 12 is a schematic diagram of the explosion in Figure 11
  • Fig. 13 is a schematic structural view of the filter holder in Fig. 12;
  • Fig. 14 is a schematic structural view of the first oil pipe in Fig. 12;
  • Fig. 15 is a schematic structural view of an oil pot cover in an embodiment of the electric tool of the present invention.
  • Fig. 16 is an exploded schematic diagram of the oil pot cover in an embodiment of the electric tool of the present invention.
  • 17 is a schematic diagram of the internal structure of the oil pot cover in an embodiment of the electric tool of the present invention.
  • Fig. 18 is a front structural schematic diagram of an oil pot cover in an embodiment of the electric tool of the present invention.
  • Fig. 19 is a sectional view along A-A direction of Fig. 18;
  • Fig. 20 is an exploded schematic view of the casing of the electric tool in an embodiment of the present invention.
  • Fig. 21 is a schematic structural view of the first housing in Fig. 20;
  • Fig. 22 is a schematic structural view of the second housing in Fig. 20;
  • Figure 23 is a rear view of Figure 21;
  • Fig. 24 is a structural schematic diagram of a brushed motor installed in the case of the electric tool of the present invention in an embodiment
  • Fig. 25 is a structural schematic diagram of a brushless motor installed in the case of the power tool of the present invention in an embodiment
  • Fig. 26 is a partially enlarged schematic diagram in Fig. 25;
  • Fig. 27 is a schematic diagram of a motor support pad in an embodiment of the electric tool of the present invention.
  • Fig. 28 is an assembly schematic diagram of the driving device, the transmission device and the cutting device of the electric tool of the present invention.
  • Fig. 29 is a schematic structural view of a cutting device in an embodiment of the electric tool of the present invention.
  • Fig. 30 is a schematic structural view of the knife chain in Fig. 29;
  • Fig. 31 is a schematic structural view of the knife plate in Fig. 29 .
  • the present invention provides an electric tool for improving the clogging of the oil pump in the oil storage device.
  • the electric tool of the present invention comprises casing 1, driving device, cutting device 4 and oil storage device 6, wherein, driving device, cutting device 4 and oil storage device 6 are installed in casing 1,
  • the driving device includes a driving motor 2 and a transmission device 3.
  • the driving motor 2 can be a brush motor or a brushless motor.
  • the transmission device 3 can transmit the power of the driving motor 2 to the cutting device 4.
  • the oil storage device 6 is arranged near the casing 1.
  • One side of the cutting device 4 is used to provide lubricating oil for the cutting device 4 to play the role of lubrication and cooling.
  • the oil storage device 6 includes an oil pot 600 and an oil pump 620, the oil pot 600 is connected to the oil pump 620 through a first oil pipe 630, and a filtering structure is arranged between the first oil pipe 630 and the oil pot 600 for Filter the large particles of impurities in the lubricating oil entering the oil pump 620 from the oil pot 600 to prevent the large particles of impurities from blocking the oil pump.
  • the oiler 600 is provided with an oiler outlet 601 and an oiler inlet 602.
  • the oiler outlet 601 is arranged at the bottom of the oiler 600, and the oiler inlet 602 is arranged at the The upper part of the oil pot is provided with an oil pot cover 610 on the oil pot oil inlet 602.
  • One end of the first oil pipe 630 is connected with the oil outlet 601 of the oil pot, the other end is connected with the oil suction port of the oil pump 620, one end of the second oil pipe 640 is connected with the oil discharge port of the oil pump 620, and the other end extends to the cutting device 4 to be lubricated parts.
  • the oil pump 620 can be a plunger pump, and the suction of the plunger pump is controlled by an oil pump cam 6201 arranged on the sprocket drive shaft 300 (see FIG. 26 ).
  • the filter structure is arranged at the end of the first oil pipe 630 connected to the oil outlet 601 of the oil pot, which is denoted as the first filter structure 650
  • the first filter structure 650 includes claws 6501, the first filter body 6502 and filter spring 6503, the claw 6501 is installed at the end of the first oil pipe 630, and the claw 6501 is provided with an oil inlet hole communicating with the first oil pipe 630, the first filter body 6502 is installed In the claw 6501 , the filter spring 6503 is sleeved on the claw 6501 and fixes the first filter body 6502 in the claw 6501 .
  • the claw 6501 includes a tubular portion 65011, a claw plate 65012 connected to the tubular portion 65011, and claw teeth 65013 arranged on the side of the claw plate 65012 away from the tubular portion 65011, on the claw plate 65012
  • An oil inlet hole communicating with the tubular portion 65011 is provided.
  • the outer diameter of the tubular part 65011 matches the diameter of the end of the first oil pipe 630.
  • the first oil pipe 630 is a rubber oil pipe.
  • the tubular part 65011 is inserted into the first oil pipe 630 and tightens the first oil pipe 630; After the 65011 is inserted into the first oil pipe 630, the claw plate 65012 stops at the first oil pipe 630; the claw teeth 65013 are arranged at intervals along the circumference of the claw plate 65012, and the claw teeth 65013 enclose the accommodation chamber of the first filter body 6502, and the first filter body 6502 Fill in the cavity surrounded by minions 65013.
  • the minions 65013 are in the shape of a triangular prism, and one of the side edges faces the filter body 6502.
  • the side edge facing the filter body can be cut into a plane, and Round corners.
  • a circular groove matching the diameter of the first filter body 6502 is opened on the side of the claw plate 65012 facing the first filter body 6502.
  • the first filter body 6502 is clamped inside the circular groove.
  • the first filter body 6502 can be Filter sponge or other filter body with filter performance.
  • the filter spring 6503 includes a cylindrical spring 65031 and a conical spring 65032, and the conical spring 65032 is arranged at one end of the cylindrical spring 65031 and connected with it as a whole.
  • Cylindrical spring 65031 is set outside the claw 6501, and holds the filter body 6502 in the claw 6501 tightly, and the cone spring 65032 is blocked on the opening of the claw 6501 to prevent the first filter body 6502 from falling off from the claw 6501 .
  • the gap between the steel wires of the filter spring 6503 can also act as a layer of oil filtering effect, so as to realize the double filtration of the filter structure, so that the lubricating oil entering the oil pump 620 does not contain large particles of dirt and impurities, and can lubricate and cut for a long time device.
  • the oil outlet 601 of the oil pot is a circular hole
  • one end of the first oil pipe 630 installed with the first filter structure 650 is inserted into the circular hole
  • the other end of the first oil pipe 630 It is connected with the oil suction port of the oil pump 620.
  • an anti-leakage structure 6301 is provided at the connection between the first oil pipe 630 and the oil outlet 601 of the oil pot.
  • the anti-leakage structure 6301 is elastic, and can be bonded to the first oil pipe 630 , or integrally formed with the first oil pipe 630 .
  • the anti-leakage structure 6301 includes a cylindrical outer wall 63011 matched with the oil outlet 601 of the oil pot, and a first flange 63012 and a second flange 63013 respectively arranged at both ends of the cylindrical outer wall 63011.
  • the oil outlet 601 of the pot forms a radial sealing structure.
  • the first flange 63012 is located inside the oil outlet 601 of the oil pot, and the second flange is located outside the oil outlet 601 of the oil pot.
  • the edge 63013 relies on its own elastic force to press and seal on the surrounding walls of the oil outlet 601 of the oil pot to form an end face sealing structure.
  • the outer side of the second flange 63013 is further provided with a third flange 63014 connected thereto, which plays a role of strengthening the seal.
  • One end of the second oil pipe 640 is connected to the oil discharge port of the oil pump 620 , and the other end of the second oil pipe 640 extends to the part to be lubricated or cooled of the cutting device 4 .
  • the filter structure can also be arranged in the oil outlet 601 of the oil pot, which is denoted as the second filter structure 660.
  • the oil outlet 601 of the oil pot is provided with There is an oil nozzle 6601 protruding from the oil outlet 601 of the oil pot, and the second filter structure 660 is arranged in the oil nozzle 6601 .
  • the second filter structure 660 includes a filter holder 6602 and a second filter body (not shown in the figure) arranged in the filter holder 6602.
  • the filter holder 6602 is inserted into the oil nozzle 6601 with interference, and the end of the first oil pipe 630 is sleeved On the oil nozzle 6601, and press the filter holder into the oil nozzle 6601.
  • the filter bracket 6602 includes a filter tube 66021 and a stopper 66022 arranged at one end of the filter tube 66021, and the stopper 66022 is provided with a through hole 66024 communicating with the filter tube 66021, and the stopper 66022 stops on the oil nozzle 6601,
  • the side of the blocking part 66022 in contact with the oil nozzle 6601 is provided with a mating surface matched with the oil nozzle 6601 .
  • the end of the stop portion 66022 facing away from the filter tube 66021 is provided with a tapered surface, which is denoted as the first tapered surface 66025 , so as to facilitate the installation of the first oil pipe 630 .
  • the side wall of the filter tube 66021 is provided with a plurality of oil inlet holes 66023.
  • the oil inlet holes 66023 are rectangular through holes, and the plurality of rectangular through holes are evenly distributed along the circumference of the filter bracket 6602. The rectangular through holes can increase the filtration capacity. area.
  • the second filter body can be a filter sponge or a filter screen covered on the rectangular through hole, such as a nylon filter screen, and the nylon filter screen is covered on the rectangular through hole to filter the lubricating oil entering the oil pump 620. Specifications can be determined according to the working environment and the oil filter hole inside the oil pump 620, so as to achieve efficient filtering of large particle impurities in the lubricating oil and prevent the oil pump 620 from clogging.
  • the filter support 6602 can also be a nylon support, and the nylon filter screen and the nylon support are integrally injection molded.
  • the oil outlet 601 of the oil pot is a circular hole
  • the oil nipple 6601 is a cylindrical tube matching it
  • the connection position between the oil nipple 6601 and the oil outlet 601 of the oil pot is provided with an oil
  • the fully fitted flanging of the pot shell can prevent oil leakage at the oil nozzle 6601.
  • the oil nozzle 6601 and the oil outlet 601 of the oil pot can also be of an integral structure.
  • the end of the oil nozzle 6601 facing away from the oil outlet 601 of the oil pot is provided with an inwardly contracting tapered surface, which is recorded as the second tapered surface 66011.
  • the design of the tapered surface is conducive to guiding the first oil pipe 630 to be easily fitted on the oil nozzle 6601 superior.
  • the first oil pipe 630 is made of rubber, and the inner diameter of the end of the first oil pipe 630 connected to the oil nozzle 6601 matches the outer diameter of the oil nozzle 6601.
  • the first oil pipe 630 is sleeved On the oil nipple 6601, and using the elasticity of the rubber material, the oil nipple 6601 tightens the first oil pipe 630, and then tie a cable tie on the outside of the first oil pipe 630, which can effectively prevent oil leakage between the oil nipple 6601 and the first oil pipe 630, and also It can prevent the first oil pipe 630 from falling off from the oil nozzle 6601 during use.
  • the filter structure has a small overall volume and can be used in small oil pots or irregular blow molding oil pots with oil nozzles.
  • the oil pot cover 610 includes a cover body 611, a cavity 612 disposed in the cover body 611 and a one-way air-permeable structure 613 disposed in the cavity 612.
  • the cover body 611 The inner side wall of the oil pot is provided with a threaded structure 6111 that matches the external thread of the oil inlet 602 of the oil pot.
  • the chamber 612 is arranged inside the cover body 611 and is recessed toward the side of the oil pot 600. The chamber 612 is away from the side of the oil pot 600.
  • One side is provided with an air inlet 6112 communicating with the outside world, and the side facing the oil pot 600 is provided with an air outlet 6121, the diameter of the air outlet 6121 is smaller than that of the air inlet 6112, and only a small amount of lubricating oil can pass through the air outlet 6121 ; the one-way air-permeable structure 613 is disposed inside the chamber 612 .
  • the one-way air-permeable structure 613 allows gas to enter the oiler 600 from the outside, but can prevent the liquid in the oiler 600 from overflowing from the one-way air-permeable structure, which can not only replenish air in time during the suction process of the oil pump 620, but also prevent the oiler from leaking.
  • the liquid in the 600 overflows causing loss and leakage pollution.
  • anti-slip protrusions 6113 are provided on the outer wall of the cover body 611, and the anti-slip protrusions 6113 are arranged at intervals along the circumferential direction. When force is required, the anti-slip protrusions 6113 can increase a certain friction force .
  • the anti-slip protrusions 6113 are hat-shaped structures, the hat bodies are arranged at intervals, and the brims of the hats are connected together to form a circle of patterns, which has a certain aesthetic effect.
  • the end of the cover body 611 facing the oil pot 600 is provided with an inwardly contracting tapered surface, denoted as a third tapered surface 6114 and a mating surface 6115 matching the oil pot 600 ,
  • the mating surface 6115 can be fully fitted with the oil pot 600, and the design of the tapered surface can prevent the oil in the oil pot 600 from leaking.
  • the one-way air-permeable structure 613 includes a one-way air intake valve 6131 , and the end of the one-way air intake valve 6131 facing the air intake hole 6112 is provided with an air intake slit 61311 .
  • the one-way air intake valve 6131 allows gas to enter the oil pot 600 from the outside of the oil pot cover 610, but does not allow the liquid in the oil pot 600 to overflow.
  • the one-way air intake valve 6131 is a rubber part with a certain degree of elasticity, and has a one-way ventilation function that can ventilate into the oil pot 600 but cannot leak oil outward.
  • the third filter body 6132 can be a filter element sintered with copper powder or a filter element made of other air-permeable materials such as PE, which is a breathable filter element of 20-100 mesh, preferably a breathable filter element of 60-80 mesh. Installed on the top of the one-way air intake valve 6131, the air intake hole 6112 is blocked.
  • the internal pressure of the oil pot 600 changes, and the air will pass through the third filter body 6132, then enter the one-way air intake valve 6131 through the air intake slit 61311 of the one-way air intake valve, and then pass through the bottom of the chamber 612
  • the air outlet hole 6121 of the oil pot enters the inside of the oil pot 600; when the hand-held cutting tool is placed sideways or upside down, the lubricating oil inside the oil pot 600 will enter the oil pot cover 610, because the area of the air outlet hole 6121 on the chamber 611 is small, Only a small part of the oil can pass through, and the one-way intake valve 6131 is reversely sealed, so it is difficult for oil to penetrate the copper powder filter element, thereby realizing the sealing of the oil pot cover 610 and preventing oil from seeping out from the oil pot cover 610.
  • a sealing ring 614 is provided inside the cover 611 .
  • the sealing ring 614 is preferably made of elastic silicone material, which can be in the form of a conventional annular gasket.
  • an annular groove 6141 is provided on the end of the cover 611 near the air inlet 6112, and the sealing ring 614 can be filled inside the annular groove 6141 by using the elasticity of the silicone material, so that the cover 611 can enter the oil pot.
  • the cover 611 is also provided with a pull wire 615 to prevent the cover 611 from being lost.
  • One end of the pull wire 615 is installed in the cover 611, and the other end of the pull wire 615 extends to the inside of the oil pot 600, and It is connected with the stop body 616 that can enter the inside of the oil pot 600 .
  • the pull wire 615 is installed at a position different from that of the chamber 612 to prevent the oil in the oil pot 600 from leaking from the installation position of the pull wire 615 .
  • the connection method between the pull wire 615 and the cover body 611 is not limited, and can be any suitable connection means.
  • the inside of the cover body 611 is provided with a mounting hole 6151 for the pull wire 615, the mounting hole 6151 is located on one side of the chamber 612, and the end of the pull wire 615 facing the cover body 611 is provided with a The mounting structure matched with the mounting hole 6151 is threaded or inserted into the mounting hole 6151 through the mounting structure.
  • a spherical concave cavity 6152 is provided in the mounting hole 6151.
  • One end of the mounting hole 6151 facing the pull wire 615 is provided with an opening groove 6153 for increasing the elasticity of the wall of the mounting hole 6151.
  • One end of the pull wire 615 is provided with a groove that matches the spherical concave cavity 6152.
  • the sphere 6154 is integrally injection-molded with the pull wire 615 , and the sphere 6154 is snapped into the spherical concave cavity 6152 .
  • This setting method can make the pull wire 615 rotate in any angle, not only can rotate flexibly, but also can prevent the end of the pull wire 615 from falling off or being entangled due to the rotation of the pull wire 615 .
  • the stop body 616 is an elastically deformable bracket, the bracket and the pull wire 615 are integrally formed, and can enter the oil pot 600 from the oil inlet 602 along its longitudinal direction. After entering the oil pot 600, it can no longer be pulled out from the oil inlet 602 of the oil pot under the action of non-external force.
  • the stop body 616 is an "A"-shaped conical structure, and the stay wire 615 is connected to the tip of the "A" shape. The size of the open end of the "A" shape is larger than the diameter of the oil inlet 602 of the oil pot.
  • the structure of the stop body 616 is beneficial to the elastic compression deformation of the stop body 616 when it is taken out, so as to be taken out from the oil inlet 602 of the oil pot.
  • the stop body 616 can also be a stop rod (not shown in the figure), and the pull wire 615 is connected to the middle part of the stop rod, and the stop rod can enter the oil inlet 602 of the oil pot in the axial direction, and It is stopped by the oil inlet 602 of the oil pot when it is brought up.
  • the diameter of the stop rod is smaller than the diameter of the oil inlet 602 of the oil pot, and can enter the inner cavity of the oil pot 600 from the oil inlet 602 of the oil pot, and the length of the stop rod is greater than the diameter of the oil inlet 602 of the oil pot and smaller The minimum width of the inner cavity of 600, when the backguy 615 is pulled, the stopper rod is laterally stopped on the oil inlet 602 of the oil pot under the double action of the backguy 615 and gravity.
  • the casing 1 of the present invention includes a first casing 100 and a second casing 110.
  • a plurality of first support ribs 101 are arranged inside the first casing 100.
  • the position corresponding to the first supporting rib 101 is provided with a second supporting rib 111.
  • the casing 1 also includes a motor support pad 130, the motor support pad 130 is detachably installed on the first support rib 101 and the second support rib 111, and the inner diameter of the motor support pad 130 is the same as Brushless motors are sized to match.
  • the first support rib 101 is integrated with the first housing 100
  • the second support rib 111 is integrated with the second housing 110
  • the side of the two supporting ribs 111 facing the motor accommodation cavity 120 is provided with an arc-shaped mating surface matched with the brushed motor 21 .
  • the first support rib 101 and the second support rib 111 divide the motor housing cavity 120 into a first chamber 121, a second chamber 122 and a third chamber 123.
  • the drive motor 2 is installed, the head of the drive motor 2 is located at the first chamber.
  • a chamber 121 the main body of the driving motor 2 is located in the second chamber 122
  • the output end of the driving motor 2 is located in the third chamber 123 .
  • the positions of the first housing 100 and the second housing 110 corresponding to the motor accommodating cavity 120 are provided with windshields 140, and the front and rear air inlets of the drive motor 2 are both Located at the windshield 140 position of the casing, the heat dissipation effect of the drive motor 2 is better, and the drive motor 2 can be guaranteed to work for a long time.
  • the motor support pad 130 is a rubber retaining ring, which includes a first rubber pad 131 arranged on the first support rib 101 and a second rubber pad 132 arranged on the second support rib 111 , the first rubber pad 131 is installed opposite to the second rubber pad 132 .
  • the side of the motor support pad 130 in contact with the first support rib 101 and the second support rib 111 is provided with a washer groove 133 for accommodating the support rib, and the side of the motor support pad 130 in contact with the brushless motor 22 is provided with a
  • the brushless motor 22 is matched with an arc-shaped washer mating surface 134 , and the arc-shaped gasket mating surface 134 is also provided with a slot 135 for accommodating the shell pillar of the brushless motor 22 .
  • the brushless motor 22 can be completely attached to the motor support pad 130 .
  • the motor support pad 130 is arranged on the support ribs in the second chamber 122.
  • the motor support pad 130 is located on the main body of the brushless motor 22, so that the motor support pad 130 can place the first chamber 121
  • the windshield of the windshield is separated from the windshield positioned at the third chamber 123, and the front air inlet of the brushless motor 22 and the fan blade heat dissipation at the tail can be effectively separated to avoid chaotic wind and scattered wind, which will affect the effective heat dissipation of the motor.
  • the motor support pad 130 is made of rubber, which also has the effect of shock absorption and noise isolation.
  • the number of motor support pads 130 in the present invention can be one or more.
  • the flange at the output end is mostly fixed on the housing through the motor bracket, and too many motor support pads 130 will increase the difficulty of assembly.
  • there is only one motor support pad 130 and the motor support pad 130 passes through the gasket groove 133 is clamped on the first support rib 101 and the second support rib 111 , the brushless motor 22 is installed in the motor support pad 130 , and the motor output flange is installed in the casing 1 through the motor bracket 23 .
  • the motor bracket 23 is clamped in the slot surrounded by the support ribs inside the third chamber 123 , and the motor bracket 23 can provide support for the rotation of the output shaft of the drive motor 2 and the sprocket drive shaft 300 .
  • a transmission device accommodation chamber 150 and an oil storage device accommodation chamber 160 in the casing 1 there are also a transmission device accommodation chamber 150 and an oil storage device accommodation chamber 160 in the casing 1, and the transmission device 3 is connected with the output end of the drive motor 2, so , the transmission housing chamber 150 is disposed on one side of the output end of the driving motor 2 , and the oil storage device housing chamber 160 is disposed on the side of the transmission housing chamber 150 away from the driving motor 2 for installing the oil storage device 6 .
  • the accommodating cavity 150 of the transmission device includes a circular casing disposed on the first casing 100 , and the size of the circular casing should be larger than the size of the maximum position of the transmission device 3 .
  • Transmission device 3 comprises driving bevel gear 320, driven bevel gear 310, sprocket drive shaft 300 and sprocket wheel 330, and driving bevel gear 320 is installed on the output shaft of driving motor 2, and driven bevel gear 310 is rotatably installed on transmission
  • the sprocket drive shaft 300 is arranged along a direction perpendicular to the driven bevel gear 310, one end of the sprocket drive shaft 300 is rotationally connected with the motor bracket 23, and the other
  • a sprocket 330 , a driven bevel gear 310 , and an oil pump cam 6201 are sequentially mounted on one end along its axial direction.
  • the cutting device 4 is installed on the casing 1 and driven by the sprocket 330 .
  • the motor output shaft drives the driving bevel gear 320 to rotate
  • the driving bevel gear 320 drives the driven bevel gear 310 to rotate
  • the sprocket drive shaft 300 drives the sprocket 330 to rotate
  • the cutting device 4 The cutting action is completed under the drive of the sprocket 330.
  • the oil pump cam 6201 rotates with the sprocket drive shaft 300. Since the plunger of the plunger pump is against the edge of the oil pump cam 6201, as the oil pump cam 6201 rotates, the plunger The pump completes the suction action and provides lubricating oil to the cutting device 4 .
  • the cutting device 4 includes a knife chain 400 and a knife plate 410 guiding the knife chain 400.
  • One end of the knife chain 400 is installed on the sprocket 330, and the knife plate 410 passes through the chain plate pad 420. and bolts are fixed on the casing 1 , a guide groove 411 is provided on the outer circumference of the knife plate 410 , and the knife chain 400 is clamped in the guide groove 411 of the knife plate 410 .
  • the knife chain 400 includes a chain 401, a middle guide tooth 402 and a blade 403.
  • the blade 403 is detachably fixed on the outside of the chain 401, and the middle guide tooth 402 is detachably fixed on the inside of the chain 401.
  • the middle guide tooth 402 is connected to the guide
  • the groove 411 is engaged with snap-fitting.
  • the knife chain 400 continuously rotates around the circumference of the knife plate 410 driven by the sprocket 303 , and the middle guide tooth 402 of the knife chain 400 is engaged in the guide groove 411 of the knife plate 410 to ensure that the knife chain 400 does not disengage from the knife plate 410 .
  • the electric tool of the present invention also includes a connecting rod 5 and a power cord (not shown), one end of the connecting rod 5 is installed in the casing 1, and the other end is provided with a control handle , the power cord is arranged inside the connecting rod 5 and connected with the drive motor 2 .
  • the casing 1 is provided with a connecting rod accommodation cavity 170, which is arranged at the end of the casing 1 away from the cutting device 4, the connecting rod 5 is inserted into the connecting rod accommodation cavity 170, and fixed by screws and fastening locks .
  • the connecting rod 5 can be a telescopic rod, and by adjusting the length of the telescopic rod, it can be extended to a high place to cut the trunk or branches.
  • the oil storage device of the electric tool of the present invention is provided with a filter structure at the connection between the oil pump and the first oil pipe, through which the large particles of impurities in the lubricating oil can be filtered out, avoiding the blockage of the oil pump and enabling it to effectively lubricate knife chain.
  • the electric tool adopting the oil storage device of the present invention can increase the service life of the tool.

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Abstract

一种电动工具，包括机壳（1）、驱动装置（2）、切割装置（4）及储油装置（6），驱动装置、切割装置及储油装置均安装在机壳内，驱动装置可驱动切割装置工作，储油装置向切割装置提供润滑油；储油装置包括油壶（600）和油泵（620），油壶通过第一油管（630）与油泵相连，第一油管与油壶之间设置有过滤结构（650，660），用于过滤由油壶进入油泵内的润滑油，油壶通过油泵向切割装置提供润滑油。该电动工具的储油装置可有效改善油泵的堵塞问题，提高电动工具的使用寿命。

Description

一种电动工具 技术领域
本发明涉及切割工具领域，具体涉及一种电动工具。
背景技术
电动工具通常需要润滑油来润滑切割部件，但是由于切割环境中粉尘较多，工具周围的杂质会落入油壶中，油泵将杂质吸入后易造成油泵内部堵塞，导致电动工具的润滑系统失效，影响电动工具的使用寿命。
发明内容
鉴于以上现有技术的缺点，本发明提供一种电动工具，以改善储油装置的油泵内部堵塞的问题。
为实现上述目的及其它相关目的，本发明提供一种电动工具，该电动工具包括机壳、驱动装置、切割装置及储油装置，驱动装置安装在机壳内，切割装置安装在机壳内并由驱动装置驱动工作，储油装置安装在机壳内，用于向切割装置提供润滑油；其中，储油装置包括油壶和油泵，油壶通过第一油管与油泵相连，第一油管与所述油壶之间设置有过滤结构，用于过滤由油壶进入油泵内的润滑油，油壶通过油泵向所述切割装置提供润滑油。
在本发明一示例中，油壶上设有与第一油管连接的油壶出油口，过滤结构包括卡爪、第一过滤体和过滤弹簧，卡爪安装在第一油管与油壶出油口相连的一端，卡爪上设有与第一油管连通的进油孔，第一过滤体安装在卡爪内，过滤弹簧套设在卡爪上，并将第一过滤体固定在卡爪内。
在本发明一示例中，卡爪包括依次连接的管状部、爪盘及爪牙，管状部的外径与第一油管的内径相配，爪盘的直径大于第一油管的外径，且爪盘上设有与管状部相连通的进油孔，爪牙沿爪盘的圆周方向间隔设置围成第一过滤体的容纳腔。
在本发明一示例中，第一过滤体为过滤海绵。
在本发明一示例中，过滤弹簧包括圆柱弹簧和锥面弹簧，圆柱弹簧套装在卡爪外部，且锥面弹簧封堵在卡爪的开口上。
在本发明一示例中，第一油管与油壶出油口连接的位置上设有防漏结构，防漏结构包括圆柱形外壁及设置在圆柱形外壁两侧的第一翻边和第二翻边，圆柱形外壁贴合在第一油管外壁上，并与油壶出油口相匹配，第一翻边位于油壶出油口的内侧，第二翻边位于油壶出油口的外侧，第一翻边与第二翻边压紧密封在油壶出油口的周围壁体上。
在本发明一示例中，第二翻边的外侧设有与其相连的第三翻边。
在本发明一示例中，油壶与第一油管相连的位置设有突出于其表面的油嘴，过滤结构包括过滤支架和第二过滤体，第二过滤体安装在过滤支架内，过滤支架安装在油嘴内。
在本发明一示例中，过滤支架包括过滤管及设置在过滤管一端的止挡部，止挡部上设有与过滤管连通的通孔，过滤管的外径与油嘴的内径相匹配，止挡部的外径大于油嘴的外径。
在本发明一示例中，过滤管的侧壁上沿周向设有多个进油孔，第二过滤体分布在进油孔内。
在本发明一示例中，第二过滤体为滤网，过滤支架与滤网为一体式结构。
在本发明一示例中，第一油管的内径与油嘴的外径相匹配，第一油管涨紧套设在油嘴上。
在本发明一示例中，储油装置还包括油壶盖，油壶盖包括盖体、腔室、单向透气结构及拉线，盖体与油壶进油口螺纹连接，腔室设置在盖体内部，并向油壶的一侧凹陷，腔室背离油壶的一侧设有进气孔，朝向油壶的一侧设有出气孔；单向透气结构安装在腔室内，拉线的一端连接在腔室一侧的盖体上，另一端伸向诉油壶内，并与可进入油壶内的止挡体相连。
在本发明一示例中，单向透气结构包括单向进气阀和第三过滤体，单向进 气阀安装在腔室内，第三过滤体安装在进气孔内并将其封堵。
在本发明一示例中，止挡体为可发生弹性形变的锥形支架，锥形支架的大端尺寸大于油壶进油口的直径。
在本发明一示例中，盖体内设有拉线的安装孔，安装孔内设有球面凹腔，拉线的端部设有与球面凹腔相配的球体，拉线通过球体卡接在球面凹腔内。
在本发明一示例中，第三过滤体为铜粉烧结滤芯。
在本发明一示例中，盖体内还设有密封圈。
于本发明一示例中，驱动装置包括驱动电机，驱动电机为有刷电机或无刷电机。
于本发明一示例中，机壳包括第一壳体、第二壳体和电机支撑垫，第一壳体的内部设置多个第一支撑筋，第二壳体的内部与第一支撑筋相对应的位置设置多个第二支撑筋，第一壳体与第二壳体扣合后，第一支撑筋与第二支撑筋围成与有刷电机相匹配的电机容纳腔；电机支撑垫可拆卸地安装在第一支撑筋和第二支撑筋上，且电机支撑垫的内径与无刷电机的尺寸相匹配。
于本发明一示例中，电机支撑垫与第一支撑筋和第二支撑筋相接触的一侧面上设有容纳支撑筋的垫圈凹槽，电机支撑垫与无刷电机接触的一侧面上设有与无刷电机相匹配的圆弧形配合面。
于本发明一示例中，电机支撑垫包括安装在第一支撑筋上的第一橡胶垫和安装在第二支撑筋上的第二橡胶垫，第一橡胶垫与第二橡胶垫对应安装。
于本发明一示例中，电机支撑垫背离第一支撑筋和第二支撑筋的一侧面上设有容纳无刷电机的壳体支柱的卡槽。
于本发明一示例中，电机容纳腔包括容纳电机头部的第一腔室、容纳电机主体的第二腔室及容纳电机输出端的第三腔室。
于本发明一示例中，第一壳体与第二壳体对应于电机容纳腔的位置上均设有风窗。
于本发明一示例中，电机支撑垫可拆卸地安装在第二腔室内的支撑筋上， 电机支撑垫将位于第一腔室的风窗与位于第三腔室的风窗隔开。
本发明电动工具的储油装置，通过在第一油管与油壶之间安装过滤结构，可有效过滤由油壶进入油泵的润滑油中的大颗粒杂质，改善油泵的堵塞问题。本发明提供两种不同的过滤结构，一种是安装在第一油管的端部，利用过滤体及过滤弹簧的双重过滤，将润滑油中的杂质过滤出去，避免了油泵的堵塞，使其能够有效润滑刀链；另一种则是由过滤支架和滤网组成，滤网的规格可按工具的工作环境及油泵内部的滤油孔进行选择，此过滤结构体积较小，可用于体积小的油壶中，也可用于不规则的带油嘴的吹塑油壶，可高效过滤润滑油中大颗粒，避免对油泵造成堵塞，提高电动工具的使用寿命。
本发明电动工具的储油装置还对油壶盖的结构作了改进，在盖体内部设置腔室，腔室背离油壶的一侧设有进气孔，腔室朝向油壶的一侧设有出气孔，从进气孔进入的空气仅能通过腔室的出气孔再进入油壶，在腔室以外的区域为密封结构，增加油壶的密封性；另外，腔室内设置单向透气结构，可以允许气体外部进入腔室，但能够阻止油壶内的液体从单向透气结构内溢出，既能在抽吸装置抽吸的过程中及时补气，又能够防止容器内的液体溢出从而造成损失和泄露污染；油壶盖内部设置防丢失拉线，将拉线与腔室设置在不同的位置，可避免油从拉线的安装位置渗出。
本发明电动工具的机壳内设置可拆卸的电机支撑垫，使得同一机壳系统可兼容有刷电机和无刷电机，使用者可根据个人需求，选择安装有刷电机或无刷电机。而且，电机支撑垫将无刷电机的前端进风口及尾部的风叶散分隔开，避免因乱风、散风而影响电机的散热，提高电机的有效工作时间。
附图说明
图1为本发明电动工具于一实施例中的结构示意图；
图2为本发明电动工具拆除部分机壳后的局部示意图；
图3为本发明电动工具于一实施例中储油装置的结构示意图；
图4为图3中过滤结构的示意图；
图5为图3中过滤结构的爆炸示意图；
图6为图4中的油壶的结构示意图；
图7为图5中卡爪的结构示意图；
图8为图5中卡爪与第一过滤体的结构示意图；
图9为图5中过滤弹簧的结构示意图；
图10为图5中的第一油管的结构示意图；
图11为本发明电动工具于另一实施例中储油装置的结构示意图；
图12为图11的爆炸示意图
图13为图12中过滤支架的结构示意图；
图14为图12中第一油管的结构示意图；
图15为本发明电动工具于一实施例中的油壶盖的结构示意图；
图16为本发明电动工具于一实施例中的油壶盖的爆炸示意图；
图17为本发明电动工具于一实施例中的油壶盖的内部结构示意图；
图18为本发明电动工具于一实施例中的油壶盖的主视结构示意图；
图19为图18沿A-A向的剖面图；
图20为本发明电动工具于一实施例中机壳的爆炸示意图；
图21为图20中的第一壳体的结构示意图；
图22为图20中的第二壳体的结构示意图；
图23为图21的后视图；
图24为本发明电动工具于一实施例中机壳安装有刷电机的结构示意图；
图25为本发明电动工具于一实施例中机壳安装无刷电机的结构示意图；
图26为图25中局部放大示意图；
图27为本发明电动工具于一实施例中电机支撑垫的示意图；
图28为本发明电动工具的驱动装置、传动装置及切割装置的装配示意图；
图29为本发明电动工具于一实施例中切割装置的结构示意图；
图30为图29中刀链的结构示意图；
图31为图29中刀板的结构示意图。
元件标号说明
1、机壳；2、驱动电机；3、传动装置；4、切割装置；5、连接杆；6储油装置；100、第一壳体；101、第一支撑筋；110、第二壳体；111、第二支撑筋；120、电机容纳腔；121、第一腔室；122、第二腔室；123、第三腔室；130、电机支撑垫；131、第一橡胶垫；132第二橡胶垫；133、垫圈凹槽；134、垫圈配合面；135、卡槽；140、风窗；150、传动装置容纳腔；160、储油装置容纳腔；170、连接杆容纳腔；21、有刷电机；22、无刷电机；23、电机支架；300、链轮驱动轴；310、从动锥齿轮；320、驱动锥齿轮；330、链轮；400、刀链；410、刀板；420链板垫；401、链条；402、中导齿；403、刀片；411、导向槽；600、油壶；610、油壶盖；620、油泵；630、第一油管；640、第二油管；650、第一过滤结构；660、第二过滤结构；601、油壶出油口；602、油壶进油口；611、盖体；612、腔室；613、单向透气结构；614、密封圈；615、拉线；616、止挡体；6111、螺纹结构；6112、进气孔；6113、防滑凸起；6114、第三锥面；6115、配合面；6121、出气孔；6131、单向进气阀；61311、进气缝；6132、第三过滤体；6141、环形凹槽；6151、安装孔；6152、球面凹腔；6153、开口槽；6154、球体；6201、油泵凸轮；6501、卡爪；6502、第一过滤体；6503、过滤弹簧；65011管状部；65012、爪盘；65013、爪牙；65031、圆柱弹簧；65032、锥面弹簧；6301、防漏结构；63011、圆柱形外壁；63012、第一翻边；63013、第二翻边；63014、第三翻边；6601、油嘴；6602、过滤支架；66011、第二锥面；66021、过滤管、66022、止挡部；66023、进油孔；66024、通孔；66025、第一锥面。
具体实施方式
以下通过特定的具体实例说明本发明的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其它优点与功效。本发明还可以通过 另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本发明的精神下进行各种修饰或改变。
请参阅图1至图31，本发明提供一种电动工具，用于改善储油装置中油泵堵塞的问题。
请参阅图1和图2，本发明的电动工具包括机壳1、驱动装置、切割装置4和储油装置6，其中，驱动装置、切割装置4和储油装置6安装在机壳1内，驱动装置包括驱动电机2和传动装置3，驱动电机2可以为有刷电机或者无刷电机，传动装置3可将驱动电机2的动力传送给切割装置4，储油装置6设置在机壳1靠近切割装置4的一侧，以为切割装置4提供润滑油，起到润滑、冷却的作用。
请参阅图3和图6，储油装置6包括油壶600和油泵620，油壶600通过第一油管630与油泵620相连，第一油管630与油壶600之间设置有过滤结构，用于过滤由油壶600进入油泵620的润滑油中的大颗粒杂质，防止大颗粒杂质对油泵造成堵塞。具体的，油壶600上设有油壶出油口601和油壶进油口602，例如，油壶出油口601设置在油壶600的底部，油壶进油口602设置在油壶600的上部，油壶进油口602上设有油壶盖610。第一油管630的一端与油壶出油口601相连，另一端与油泵620的吸油口相连，第二油管640的一端与油泵620的排油口相连，另一端延伸至切割装置4的待润滑部位。油泵620可以为柱塞泵，柱塞泵的抽吸由设置在链轮驱动轴300上的油泵凸轮6201控制(参见图26)。
请参阅图3至图5，在一实施例中，过滤结构设置在第一油管630与油壶出油口601相连接的一端，记为第一过滤结构650，第一过滤结构650包括卡爪6501、第一过滤体6502及过滤弹簧6503，卡爪6501安装在第一油管630的端部，且卡爪6501上设有与第一油管630相连通的进油孔，第一过滤体6502安装在卡爪6501内，过滤弹簧6503套设在卡爪6501上，并将第一过滤体6502固定在卡爪6501内。
请参阅图5、图7和8，作为示例，卡爪6501包括管状部65011、与管状部65011相连的爪盘65012及设置在爪盘65012背离管状部65011一侧的爪牙65013，爪盘65012上设有与管状部65011连通的进油孔。管状部65011的外径与第一油管630的端部直径相配，第一油管630为橡胶油管，利用橡胶材质的弹性，管状部65011插入第一油管630内并涨紧第一油管630；管状部65011插入第一油管630后，爪盘65012止挡在第一油管630处；爪牙65013沿爪盘65012的周向间隔设置，爪牙65013围成第一过滤体6502的容纳腔，第一过滤体6502填充在爪牙65013围成的容纳腔内。较佳的，爪牙65013为近似三棱柱形状，且其中一个侧棱朝向过滤体6502，为防止三棱柱的棱将第一过滤体6502划伤，可将朝向过滤体的侧棱削成平面，并倒圆角。爪盘65012朝向第一过滤体6502的一侧面上开设有与第一过滤体6502直径相配的圆形凹槽，第一过滤体6502卡装在圆形凹槽内部，第一过滤体6502可以为过滤海棉或者其他具有过滤性能的过滤体。
请参阅图4、图5和图9，作为示例，过滤弹簧6503包括圆柱弹簧65031和锥面弹簧65032，锥面弹簧65032设置在圆柱弹簧65031的一端并与其连为一体。圆柱弹簧65031套装在卡爪6501外部，并将卡爪6501内的过滤体6502抱紧，锥面弹簧65032则封堵在卡爪6501的开口上，防止第一过滤体6502从卡爪6501内脱落。过滤弹簧6503一圈一圈钢丝间的缝隙也可以起到一层滤油效果，从而实现过滤结构的双重过滤，使得进入油泵620的润滑油不含有大颗粒的污物杂质，能够长效润滑切割装置。
请参阅图3、图6和图10，作为示例，油壶出油口601为圆形孔，第一油管630安装第一过滤结构650的一端插入圆形孔中，第一油管630的另一端与油泵620的吸油口相连接。为了防止第一油管630与油壶出油口601的连接处漏油，在第一油管630和油壶出油口601的连接处设置防漏结构6301。防漏结构6301具有弹性，并可以粘接在第一油管630上，也可以与第一油管630一体成形。防漏结构6301包括与油壶出油口601相配的圆柱形外壁63011和分别设 置于圆柱形外壁63011两端的第一翻边63012和第二翻边63013，圆柱形外壁63011过盈卡装至油壶出油口601，形成径向密封结构，第一翻边63012位于油壶出油口601的内侧，第二翻边位于油壶出油口601的外侧，第一翻边63012和第二翻边63013依靠自身弹力压紧密封在油壶出油口601的周围壁体上形成端面密封结构。较佳的，第二翻边63013的外侧还设有与之相连的第三翻边63014，起到加强密封的作用。第二油管640的一端与油泵620的排油口相连接，第二油管640的另一端延伸至切割装置4的待润滑或待冷却部位。
请参阅图11至图13，在另一实施例中，过滤结构还可设置在油壶出油口601内，记为第二过滤结构660，本实施例中，油壶出油口601上设有突出于油壶出油口601的油嘴6601，第二过滤结构660设置在油嘴6601内。第二过滤结构660包括过滤支架6602及设置在过滤支架6602内的第二过滤体(图中未示出)，过滤支架6602过盈插装至油嘴6601内，第一油管630的端部套设在油嘴6601上，且将过滤支架压紧在油嘴6601内。过滤支架6602包括过滤管66021及设置在过滤管66021一端的止挡部66022，且止挡部66022上设有与过滤管66021连通的通孔66024，止挡部66022止挡在油嘴6601上，止挡部66022与油嘴6601相接触的一面设有与油嘴6601相配的配合面。较佳的，止挡部66022背离过滤管66021的一端设有锥面，记为第一锥面66025，方便第一油管630的安装。过滤管66021的侧壁上设有多个进油孔66023，优选的，进油孔66023为长方形通孔，多个长方形通孔沿过滤支架6602的圆周均布，长方形的通孔可以增大过滤面积。第二过滤体可为覆盖在长方形通孔上的过滤海绵体或过滤网，例如可为尼龙滤网，尼龙滤网覆盖在长方形通孔上，对进入油泵620的润滑油进行过滤，滤网的规格可按根据工作环境和油泵620的内部的滤油孔而定，以此达到高效过滤润滑油中的大颗粒杂质，防止油泵620堵塞。过滤支架6602也可为尼龙支架，尼龙滤网与尼龙支架一体注塑成型。
请参阅图6和图12，作为示例，油壶出油口601为圆形孔，油嘴6601为与之相配的圆柱形管体，油嘴6601与油壶出油口601的连接位置设有与油壶壳 体完全贴合的翻边，可防止油嘴6601处漏油，在其他实施例中，油嘴6601与油壶出油口601也可以为一体式结构。较佳的，油嘴6601背离油壶出油口601的一端设有向内收缩的锥面，记为第二锥面66011，锥面的设计有利于引导第一油管630较容易的套装在油嘴6601上。
请参阅图12和14，本实施例中，第一油管630为橡胶材质，且第一油管630与油嘴6601连接的一端的内径与油嘴6601的外径相配，安装时，第一油管630套设在油嘴6601上，且利用橡胶材质的弹性，油嘴6601将第一油管630涨紧，然后在第一油管630外部绑上扎带，可有效防止油嘴6601和第一油管630间的渗油，也可防止使用过程中，第一油管630从油嘴6601上脱落。此过滤结构整体体积较小，可用于体积小的油壶中，也可用于不规则的带油嘴的吹塑油壶中。
请参阅图15至图19，在一实施例中，油壶盖610包括盖体611、设置在盖体611内的腔室612及设置在腔室612内的单向透气结构613，盖体611的内侧壁上设有与油壶进油口602的外螺纹相匹配的螺纹结构6111，腔室612设置在盖体611的内部并向油壶600一侧凹陷，腔室612背离油壶600的一侧设有与外界连通的进气孔6112，朝向油壶600的一侧设有出气孔6121，出气孔6121的孔径小于进气孔6112的孔径，仅有少量的润滑油可透过出气孔6121；单向透气结构613设置在腔室612的内部。单向透气结构613允许气体从外部进入油壶600，但能够阻止油壶600内的液体从单向透气结构内溢出，既能在油泵620抽吸的过程中及时补气，又能够防止油壶600内的液体溢出从而造成损失和泄露污染。
请参阅图15，在一示例中，盖体611的外侧壁上设有防滑凸起6113，防滑凸起6113沿周向间隔设置，当需要施力时，防滑凸起6113可增加一定的摩擦力。例如，防滑凸起6113为帽型结构，其帽体间隔设置，帽檐连在一起，形成一圈花纹，起到一定的美观效果。
请参阅图15和图17，在一示例中，盖体611朝向油壶600的一端设有向 内收缩的锥面，记为第三锥面6114及与油壶600相匹配的配合面6115，配合面6115可与油壶600完全贴合，锥面的设计可防止油壶600内的油泄漏。
请参阅图16和图17，在一示例中，单向透气结构613包括单向进气阀6131，单向进气阀6131朝向进气孔6112的端部设有进气缝61311。单向进气阀6131允许气体从油壶盖610外部向油壶600内部进入，但不允许油壶600内的液体溢出。单向进气阀6131为橡胶件，具有一定的弹性，且具备可向油壶600内透气、但不能向外渗漏油的单向通气功能。单向进气阀6131朝向进气孔6112的一端安装有对气体进行过滤的过滤体，记为第三过滤体6132。第三过滤体6132可为铜粉烧结的滤芯或PE等其他透气性材料制成的滤芯，其为20-100目的透气滤芯，优选为60～80目透气滤芯，具有粉尘过滤防护功能，可以压装在单向进气阀6131的上部，将进气孔6112封堵。当油泵620需要吸油时，油壶600内部压强变化，空气会透过第三过滤体6132，再通过单向进气阀的进气缝61311进入单向进气阀6131，再通过腔室612底部的出气孔6121进入油壶600内部；当手持式切割工具侧放或者倒放时，油壶600内部的润滑油会进入油壶盖610内，由于腔室611上的出气孔6121面积很小，只有很小部分的油能透过，而且单向进气阀6131反向密闭，油也很难渗透铜粉滤芯，从而实现油壶盖610的密封，杜绝油从油壶盖610中渗出。
请参阅图16和19，在一示例中，盖体611的内部还设有密封圈614，密封圈614优选为具有弹性的硅胶材质，其可以为常规圆环形垫片形式。本实施例中，盖体611靠近进气孔6112的端部设置环形凹槽6141，利用硅胶材质的弹性，可将密封圈614填充在环形凹槽6141内部，可以使盖体611与油壶进油口602之间具有较大的密封面。
请参阅图15至17及图19，盖体611内还设有防止盖体611丢失的拉线615，拉线615的一端安装在盖体611内，拉线615的另一端延伸至油壶600内部，且与可进入油壶600内部的止挡体616相连。拉线615安装在与腔室612不同的位置，防止油壶600内的油从拉线615的安装位置泄漏。拉线615与盖体611 之间的连接方式不限，可以为一切合适的连接手段。
请参阅图16、图17和19，在一实施例中，盖体611内部设有拉线615的安装孔6151，安装孔6151位于腔室612的一侧，拉线615朝向盖体611的一端设置有与安装孔6151相配的安装结构，通过安装结构螺纹连接或过盈插入至安装孔6151。较佳地，在安装孔6151内设置球面凹腔6152，安装孔6151朝向拉线615的一端设置有用于增加安装孔6151壁体弹性的开口槽6153，拉线615的一端设置有与球面凹腔6152相配的球体6154，球体6154与拉线615一体注塑成形，球体6154卡入至球面凹腔6152内。这种设置方式可以使拉线615在任意角度内转动，不仅转动灵活，而且能够防止因拉线615转动引起端部脱落或缠绕。
请参阅图6和图15，在一实施例中，止挡体616为可弹性变形的支架，支架与拉线615一体成形，并可沿其纵向方向从油壶进油口602进入至油壶600内，在进入至油壶600内后，无法再在非外力的作用下从油壶进油口602内拔出。例如，止挡体616为“A”字型锥形结构，拉线615连接在“A”字型的尖端，“A”字型的开口端的尺寸大于油壶进油口602的直径，采用该种结构的止挡体616，有利于止挡体616在取出时弹性压缩变形，以从油壶进油口602中取出。在其他实施例中，止挡体616也可以为止挡杆(图中未示出)，拉线615连接在止挡杆的中部，止挡杆可沿轴向进入油壶进油口602，并在提起时被油壶进油口602止挡。止挡杆的直径小于油壶进油口602的直径，可以从油壶进油口602内进入至油壶600内腔，止挡杆的长度大于油壶进油口602的直径并小于油壶600内腔的最小宽度，当拉线615提拉时，止挡杆在拉线615和重力的双重作用下横向止挡在油壶进油口602上。
请参阅图1、图2和图20至图22，本发明的机壳系统既可用于安装有刷电机，也可以用于安装无刷电机，解决了无法将有刷电机和无刷电机兼容在一套机壳系统的问题。本发明的机壳1包括第一壳体100和第二壳体110，第一壳体100的内部设置多个第一支撑筋101，第二壳体110的内部与第一壳体100 内的第一支撑筋101相对应的位置上设置有第二支撑筋111，第一壳体100与第二壳体110扣合在一起后，第一支撑筋101与第二支撑筋111围成与有刷电机相匹配的电机容纳腔120，机壳1还包括电机支撑垫130，电机支撑垫130可拆卸的安装在第一支撑筋101和第二支撑筋111上，且电机支撑垫130的内径与无刷电机的尺寸相匹配。
请参阅图2、图21和图22，第一支撑筋101与第一壳体100为一体式结构，第二支撑筋111与第二壳体110为一体式结构，第一支撑筋101及第二支撑筋111朝向电机容纳腔120的一侧设有与有刷电机21相匹配的圆弧形配合面。第一支撑筋101与第二支撑筋111将电机容纳腔120分为第一腔室121、第二腔室122及第三腔室123，安装驱动电机2时，驱动电机2的头部位于第一腔室121，驱动电机2的主体位于第二腔室122，驱动电机2的输出端位于第三腔室123。
请参阅图21至图23，在一实施例中，第一壳体100与第二壳体110对应电机容纳腔120的位置均设有风窗140，驱动电机2的前端和后端的进风口都处于机壳的风窗140位置，使驱动电机2的散热效果更佳，保证驱动电机2长时间工作。
请参阅图21至25、图27，电机支撑垫130为橡胶挡圈，其包括设置在第一支撑筋101上的第一橡胶垫131和设置在第二支撑筋111上的第二橡胶垫132，第一橡胶垫131与第二橡胶垫132相对安装。电机支撑垫130与第一支撑筋101及第二支撑筋111相接触的一侧设有容纳支撑筋的垫圈凹槽133，电机支撑垫130与无刷电机22相接触的一侧，设有与无刷电机22相匹配的圆弧形的垫圈配合面134，而且，圆弧形的垫圈配合面134上还设有容纳无刷电机22壳体支柱的卡槽135。在第一支撑筋101和第二支撑筋111上安装电机支撑垫130后，可使无刷电机22与电机支撑垫130完全贴合。较佳的，电机支撑垫130设置在第二腔室122内的支撑筋上，此时，电机支撑垫130位于无刷电机22的主体上，这样电机支撑垫130可将第一腔室121处的风窗与位于第三腔室123 处的风窗阻隔开，无刷电机22的前端进风口和尾部的风叶散热可以有效的隔开，避免乱风、散风，影响电机的有效散热。此外，电机支撑垫130选用橡胶材质，还具有减震隔绝噪音的效果。
请参阅图25和图27，需要说明的是，本发明中电机支撑垫130的数量可以为一个或更多个，具体以将电机稳定支撑为准，考虑到现有切割工具中驱动电机2的输出端法兰多通过电机支架固定在壳体上，并且过多的电机支撑垫130会导致装配难度增大，本实施例中，电机支撑垫130仅为一个，电机支撑垫130通过垫圈凹槽133卡装在第一支撑筋101和第二支撑筋111上，无刷电机22安装在电机支撑垫130内，电机输出法兰通过电机支架23安装在机壳1内。电机支架23卡装在第三腔室123内部的支撑筋围成的卡槽内，电机支架23可为驱动电机2的输出轴和链轮驱动轴300的转动提供支撑。
请参阅图2、图21、图25、图26和图28，机壳1内还设有传动装置容纳腔150和储油装置容纳腔160，传动装置3与驱动电机2的输出端相连，因此，传动装置容纳腔150设置在驱动电机2的输出端的一侧，储油装置容纳腔160设置在传动装置容纳腔150背离驱动电机2的一侧，用于安装储油装置6。传动装置容纳腔150包括设置在第一壳体100上的圆形壳体，圆形壳体的尺寸应大于传动装置3最大位置的尺寸。传动装置3包括驱动锥齿轮320、从动锥齿轮310、链轮驱动轴300及链轮330，驱动锥齿轮320安装在驱动电机2的输出轴上，从动锥齿轮310可转动地安装在传动装置容纳腔150的圆形壳体内并与驱动锥齿轮320相啮合，链轮驱动轴300沿垂直于从动锥齿轮310的方向设置，链轮驱动轴300的一端与电机支架23转动连接，另一端沿其轴向依次安装有链轮330、从动锥齿轮310、油泵凸轮6201。切割装置4安装在机壳1上，并通过链轮330驱动。启动驱动电机2，电机输出轴带动驱动锥齿轮320转动，驱动锥齿轮320带动从动锥齿轮310转动，进而带动链轮驱动轴300转动，链轮驱动轴300带动链轮330转动，切割装置4在链轮330的带动下完成切割动作，同时，油泵凸轮6201随着链轮驱动轴300转动，由于柱塞泵的柱塞抵在油泵凸 轮6201的边缘，随着油泵凸轮6201的转动，柱塞泵完成抽吸动作，向切割装置4提供润滑油。
请参阅图29至图31，在一示例中，切割装置4包括刀链400及引导刀链400的刀板410，刀链400的一端安装在链轮330上，刀板410通过链板垫420及螺栓固定在机壳1上，刀板410的外周向设有导向槽411，刀链400卡接在刀板410的导向槽411内。刀链400包括链条401、中导齿402和刀片403，刀片403可拆卸式固设于链条401的外侧，中导齿402可拆卸式固设于链条401的内侧，中导齿402均与导向槽411配合卡接。刀链400在链轮303的带动下绕刀板410的周向不断转动，刀链400的中导齿402卡接于刀板410的导向槽411内，以确保刀链400不脱离刀板410。
请参阅图1、图2和图22，本发明的电动工具还包括连接杆5和电源线(图中未示出)，连接杆5的一端安装在机壳1内，另一端设有控制手柄，电源线设置在连接杆5的内部并与驱动电机2相连。机壳1内设有连接杆容纳腔170，连接杆容纳腔170设置在机壳1背离切割装置4的一端，连接杆5插入连接杆容纳腔内170内，并通过螺钉及紧固锁扣固定。连接杆5可以为伸缩杆，通过调节伸缩杆的长度，可以伸至高处对树干或枝丫进行切割工作。
需要说明的是，本发明关于电动工具的未详细描述的部分皆可通过现有技术中的结构实现，在此不再赘述。
综上，本发明电动工具的储油装置在油泵与第一油管的连接处设置过滤结构，通过过滤结构可将润滑油中的大颗粒杂质过滤出去，避免了油泵的堵塞，使其能够有效润滑刀链。采用本发明的储油装置的电动工具，能够增加工具的使用寿命。
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利 要求所涵盖。

Claims (15)

  1. 一种电动工具，其特征在于，包括：
    机壳；
    驱动装置，安装在所述机壳内；
    切割装置，安装在所述机壳内并由所述驱动装置驱动工作；以及
    储油装置，安装在所述机壳内，用于向所述切割装置提供润滑油；
    其中，所述储油装置包括油壶和油泵，所述油壶通过第一油管与所述油泵相连，所述第一油管与所述油壶之间设置有过滤结构，用于过滤所述油壶进入所述油泵内的润滑油，所述油壶通过所述油泵向所述切割装置提供润滑油。
  2. 根据权利要求1所述的电动工具，其特征在于，所述油壶上设有与所述第一油管连接的油壶出油口，所述过滤结构包括卡爪、第一过滤体和过滤弹簧，所述卡爪安装在所述第一油管与所述油壶出油口相连的一端，所述卡爪上设有与所述第一油管连通的进油孔，所述第一过滤体安装在所述卡爪内，所述过滤弹簧套设在所述卡爪上，并将所述第一过滤体固定在所述卡爪内。
  3. 根据权利要求2所述的电动工具，其特征在于，所述卡爪包括依次连接的管状部、爪盘及爪牙，所述管状部的外径与所述第一油管的内径相配，所述爪盘的直径大于所述第一油管的外径，且所述爪盘上设有与所述管状部相连通的进油孔，所述爪牙沿所述爪盘的圆周方向间隔设置围成所述第一过滤体的容纳腔。
  4. 根据权利要求2所述的电动工具，其特征在于，所述过滤弹簧包括圆柱弹簧和锥面弹簧，所述圆柱弹簧套装在所述卡爪外部，且所述锥面弹簧封堵在所述卡爪的开口上。
  5. 根据权利要求2所述的电动工具，其特征在于，所述第一油管与所述油壶出油口连接的位置上设有防漏结构，所述防漏结构包括圆柱形外壁及设置在所述圆柱形外壁两侧的第一翻边和第二翻边，所述圆柱形外壁贴合在所述第一油管外壁上，并与所述油壶出油口相匹配，所述第一翻边位于所述油壶出油口的内侧，所述第二翻边位于所述油壶出油口的外侧，所述第一翻边与所述第二翻边压紧密封在所述油壶出油口的周围壁体上。
  6. 根据权利要求1所述的电动工具，其特征在于，所述油壶与所述第一油管相连的位置设有突出于其表面的油嘴，所述过滤结构包括过滤支架和第二过滤体，所述第二过滤体安装在所述过滤支架内，所述过滤支架安装在所述油嘴内。
  7. 根据权利要求6所述的电动工具，其特征在于，所述过滤支架包括过滤管及设置在所述过滤管一端的止挡部，所述止挡部上设有与所述过滤管连通的通孔，所述过滤管的外径与所述油嘴的内径相匹配，所述止挡部的外径大于所述油嘴的外径。
  8. 根据权利要求7所述的电动工具，其特征在于，所述过滤管的侧壁上沿周向设有多个进油孔，所述第二过滤体分布在所述进油孔内。
  9. 根据权利要求8所述的电动工具，其特征在于，所述第二过滤体为滤网，所述过滤支架与所述滤网为一体式结构。
  10. 根据权利要求6所述的电动工具，其特征在于，所述第一油管的内径与所述油嘴的外径相匹配，所述第一油管涨紧套设在所述油嘴上。
  11. 根据权利要求1所述的电动工具，其特征在于，所述储油装置还包括油壶 盖，所述油壶盖包括盖体、腔室、单向透气结构及拉线，所述盖体与所述油壶螺纹连接，所述腔室设置在所述盖体内部，并向所述油壶的一侧凹陷，所述腔室背离所述油壶的一侧设有进气孔，朝向所述油壶的一侧设有出气孔；所述单向透气结构安装在所述腔室内，所述拉线的一端连接在所述腔室一侧的盖体上，另一端伸向所述油壶内，并与可进入所述油壶内的止挡体相连。
  12. 根据权利要求11所述的电动工具，其特征在于，所述单向透气结构包括单向进气阀和第三过滤体，所述单向进气阀安装在所述腔室内，所述第三过滤体安装在所述进气孔内并将其封堵。
  13. 根据权利要求1所述的电动工具，其特征在于，所述机壳包括第一壳体、第二壳体和电机支撑垫，所述第一壳体的内部设置多个第一支撑筋，所述第二壳体的内部设置多个第二支撑筋，所述第一壳体与所述第二壳体扣合后，所述第一支撑筋与所述第二支撑筋围成与有刷电机相匹配的电机容纳腔；所述电机支撑垫可拆卸地安装在所述第一支撑筋和第二支撑筋上，且所述电机支撑垫的内径与无刷电机的尺寸相匹配。
  14. 根据权利要求13所述的电动工具，其特征在于，所述电机支撑垫与所述第一支撑筋和所述第二支撑筋相接触的一侧面上设有容纳支撑筋的垫圈凹槽，所述电机支撑垫与无刷电机接触的一侧面上设有与所述无刷电机相匹配的圆弧形配合面。
  15. 根据权利要求14所述的电动工具，其特征在于，所述第一壳体与所述第二壳体对应于所述电机容纳腔的位置上均设有风窗，所述电机支撑垫将位于电机头部与电机输出端的风窗分隔开。
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