WO2013067960A1 - 工作头 - Google Patents

工作头 Download PDF

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Publication number
WO2013067960A1
WO2013067960A1 PCT/CN2012/084375 CN2012084375W WO2013067960A1 WO 2013067960 A1 WO2013067960 A1 WO 2013067960A1 CN 2012084375 W CN2012084375 W CN 2012084375W WO 2013067960 A1 WO2013067960 A1 WO 2013067960A1
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WO
WIPO (PCT)
Prior art keywords
mounting hole
center
working head
hole
head according
Prior art date
Application number
PCT/CN2012/084375
Other languages
English (en)
French (fr)
Inventor
布朗•沃伦
索默•哈利
格哈德•格雷厄姆
霍立祥
Original Assignee
苏州宝时得电动工具有限公司
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
Priority claimed from CN201110459605.3A external-priority patent/CN103101038B/zh
Priority claimed from CN201110459567.1A external-priority patent/CN103101037B/zh
Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2013067960A1 publication Critical patent/WO2013067960A1/zh

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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
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power 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
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/04—Portable grinding machines, e.g. hand-guided; Accessories therefor with oscillating grinding tools; Accessories therefor

Definitions

  • the present invention relates to a working head, and more particularly to a working head for fitting to a shaft end of an output shaft that can be rotationally reciprocally driven.
  • the multi-function machine is a common hand-held oscillating power tool in the industry. Its working principle is that the output shaft oscillates around its own axis. Therefore, when the user installs different working heads on the free end of the output shaft, such as a straight saw blade, a circular saw blade, a triangular sanding disc, and a shovel-type scraper, a variety of different operating functions can be realized, such as sawing and cutting. , grinding, scraping, etc., to adapt to different work needs.
  • the working principle of the multi-function machine is:
  • the motor driver is installed in the multi-function tool body, and the eccentric output shaft mounted in the spherical bearing is oscillated by the shifting fork, thereby driving the working element to perform the oscillating motion, thereby realizing the processing of the workpiece.
  • Different working elements have different specialized uses, such as saw blades for cutting, sandpaper for sanding, etc., where the saw blade is a commonly used working element on multi-tools.
  • a working head that can be mounted to an output shaft of a power tool, the working head being provided with a mounting portion that cooperates with the output shaft, the mounting portion is provided with a central hole having a center, wherein the mounting portion is An inner mounting hole and an outer mounting hole are further provided, the inner mounting hole includes at least two protrusions extending outward from the center hole; the outer mounting hole includes at least two openings, and the opening is distributed On the circumference centered on the center; the outer mounting hole is radially outside the inner mounting hole, and the outer mounting hole and the inner mounting hole are capable of translating with at least two different types The output shafts are respectively mated.
  • the mounting portion has an outer edge, and the mounting portion is provided with a notch extending from the outer edge to the inner mounting hole.
  • the notch is at an angle of 60 with respect to the center of the central bore.
  • the cross section of the opening is a centrally symmetrical pattern having a centerline extending radially through the center.
  • the opening comprises an inner segment and an outer segment arranged in a radial direction, the inner segment being closer to a center of the inner mounting hole than the outer segment, in a direction perpendicular to the center line
  • the maximum width of the inner segment is greater than the maximum width of the outer segment.
  • the outer section has a rectangular cross section
  • the inner section has a circular cross section
  • the inner section has a larger diameter than the outer section
  • At least one projection of the inner mounting hole is in communication with an opening of the outer mounting hole.
  • the circumferential angle between adjacent protrusions of the inner mounting hole is less than or equal to 120 degrees with respect to the center, and the circumferential direction of the adjacent opening of the outer mounting hole is opposite to the center The angle is less than or equal to 120 degrees.
  • the circumferential angle between adjacent protrusions of the inner mounting hole is 45 degrees with respect to the center, and the circumferential opening of the adjacent opening of the outer mounting hole is opposite to the center The angle is 30 degrees.
  • the inner mounting hole has five protrusions
  • the outer mounting hole has nine openings
  • the mounting portion has a mating surface facing the output shaft, the mating surface is formed with a recessed portion around the central hole, the recessed portion has a bottom surface, and the inner mounting hole is disposed on the bottom surface
  • the inner mounting hole and the recess can be respectively engaged with the output shafts of at least two different types of the power tools.
  • the output shaft is provided with a driving portion that cooperates with the mounting portion, and the recessed portion includes at least a first side wall and a second side wall that are engaged with the driving portion, and the recessed portion passes through the The engagement of the first side wall and the second side wall transmits torque to the mounting portion.
  • the first side wall and the second side wall are located on the sides of a regular polygon or a regular polygon centered on the center of the center hole.
  • the mounting portion is formed by stacking a first body and a second body disposed in parallel,
  • the first body has a support surface supporting the second body, a bottom surface of the recess is formed on a support surface of the first body, and the first side wall and the second side wall are formed on the second body.
  • the inner mounting hole and the center hole are located on the first body, the outer mounting hole extends through the first body and the second body, and a size of a middle portion of the second body is larger than The middle hole of the center hole, the outer mounting hole on the second body communicates with the middle hole.
  • the first body and the second body have a thickness ranging from 0.5 to 1 mm.
  • the thickness of the second body is 0.5 to 3 times the thickness of the first body.
  • the mounting portion is detachably mounted with an adapter, and the adapter is provided with at least two protruding posts that cooperate with the opening of the external mounting hole toward a side of the working head.
  • the middle portion of the adapter is provided with a third mounting hole that can be engaged with the output shaft.
  • the third mounting hole has a cross section of one of a regular polygon or a regular polygon.
  • the working head of the present invention is provided with a central hole, an inner mounting hole and an outer mounting hole on the mounting portion thereof, the inner mounting hole comprises at least two protrusions extending outward from the center hole, and the outer mounting hole comprises at least two openings, The openings are distributed on a circumference centered on the center of the center hole.
  • the inner mounting hole and the outer mounting hole can be matched with at least two types of output shafts respectively, thereby greatly improving the versatility of the working head, reducing the trouble of the user to replace different types of working heads, and more convenient for the user.
  • a working head mountable to an output shaft of a power tool, the working head being provided with a mounting portion that cooperates with the output shaft, the mounting portion being provided with a central hole having a center and a mating surface facing the output shaft
  • the mounting portion is formed with a recessed portion from the mating surface around the center hole, the recessed portion has a bottom surface, and the mounting portion is provided with an inner mounting hole from the bottom surface in a direction away from the mating surface
  • the inner mounting hole and the recess can be respectively engaged with the output shafts of at least two different types of the power tools.
  • the output shaft is provided with a driving portion that cooperates with the mounting portion, and the recessed portion includes at least a first side wall and a second side wall that are engaged with the driving portion, and the recessed portion passes through the The engagement of the first side wall and the second side wall transmits torque to the mounting portion.
  • the first side wall and the second side wall are located on the sides of a regular polygon or a regular polygon centered on the center of the center hole.
  • the mounting portion includes a first body and a second body that are superposed, the first body has a supporting surface supporting the second body, and a bottom surface of the recess is formed on the support of the first body The first sidewall and the second sidewall are formed on the second body.
  • the mounting portion is provided with an external mounting hole outside the inner mounting hole and extending through the first body and the second body, and a central portion of the second body is opened to have a larger size than the center A middle hole of the hole, the outer mounting hole on the second body communicates with the middle hole.
  • the first body and the second body have a thickness ranging from 0.5 to 1 mm.
  • the thickness of the second body is 0.5 to 3 times the thickness of the first body.
  • the inner mounting hole includes at least two protrusions extending outward from the center hole.
  • the mounting portion includes an outer mounting hole, the outer mounting hole includes at least two openings, the openings are distributed on a circumference centered on a center of the center hole, and are located in a radial direction Outside the internal mounting holes.
  • the cross section of the opening is a centrally symmetrical pattern having a centerline extending radially through the center.
  • the opening comprises an inner segment and an outer segment which are radially disposed in sequence, the inner segment being farther from the center than the outer segment, in a direction perpendicular to the center line, the inner portion
  • the maximum width of the segment is greater than the maximum width of the outer segment.
  • the outer section has a rectangular cross section
  • the inner section has a circular cross section
  • the inner section has a diameter larger than the outer section
  • the projection of at least one of the inner mounting holes communicates with the opening of one of the outer mounting holes.
  • an angle between the adjacent protrusions of the inner mounting hole with respect to the center is less than or equal to 1 20 degrees, and an adjacent opening of the outer mounting hole is opposite to a circumference of the center The angle of the angle is less than or equal to 1 20 degrees
  • the circumferential angle between adjacent protrusions of the inner mounting hole is 45 degrees with respect to the center, and the circumferential opening of the adjacent opening of the outer mounting hole is opposite to the center The angle is 30 degrees.
  • the inner mounting hole has five protrusions
  • the outer mounting hole has nine openings
  • the mounting portion has an outer edge, and the mounting portion is provided with a notch extending from the outer edge to the central hole.
  • the notch is at an angle of 60 with respect to the center of the central bore.
  • the working head of the present invention has a recessed portion on the mounting portion thereof and an inner mounting hole on the bottom surface of the recessed portion, so that the recessed portion and the inner mounting hole can be respectively separated from the output shafts of different types of power tools.
  • the mating thereby greatly improving the versatility of the work head, reducing the trouble of the user to replace different types of work heads, and more convenient for the user to use.
  • FIG. 1 is a schematic view showing the combination of a working head mounted to a power tool in a first embodiment of the present invention.
  • Figure 2 is a perspective view of the working head shown in Figure 1.
  • Figure 3 is a perspective view of the back of the working head shown in Figure 2.
  • Figure 4 is a front elevational view of the working head of Figure 2.
  • Fig. 5 is a perspective exploded view of the working head shown in Fig. 2.
  • Fig. 6 is a perspective view showing the output shaft of the first power tool shown in Fig. 1.
  • Figure 7 is a schematic view of the working head of Figure 2 mated with the output shaft of Figure 6.
  • Figure 8 is a perspective view showing the output shaft of the second power tool shown in Figure 1.
  • Figure 9 is a schematic view of the working head shown in Figure 2 mated with the output shaft shown in Figure 8.
  • Figure 10 is a perspective view showing the output shaft of the third power tool shown in Figure 1.
  • Figure 11 is a schematic view of the working head of Figure 2 mated with the output shaft of Figure 10.
  • Figure 12 is a perspective view showing the output shaft of the fourth power tool shown in Figure 1.
  • Figure 13 is a schematic view of the working head of Figure 2 mated with the output shaft of Figure 12;
  • Figure 14 is a perspective view showing the output shaft of the fifth power tool shown in Figure 1.
  • Figure 15 is a schematic view of the working head of Figure 2 mated with the output shaft of Figure 14.
  • Figure 16 is a perspective view showing the output shaft of the sixth power tool shown in Figure 1.
  • Figure 17 is a schematic view of the working head of Figure 2 mated with the output shaft of Figure 16.
  • Figure 18 is a perspective view showing the output shaft of the seventh power tool shown in Figure 1.
  • Figure 19 is a schematic view of the working head of Figure 2 mated with the output shaft of Figure 18.
  • Figure 20 is a perspective view showing the output shaft of the eighth power tool shown in Figure 1.
  • Figure 21 is a schematic view of the working head of Figure 2 mated with the output shaft of Figure 20.
  • Fig. 22 is a schematic view showing the other direction of the working head shown in Fig. 2 in cooperation with the output shaft shown in Fig. 20.
  • Fig. 23 is a perspective view showing the working head in the second embodiment of the present invention.
  • Figure 24 is a perspective exploded view of the working head shown in Figure 23.
  • Figure 25 is a schematic view of the working head of Figure 23 mated with the output shaft of Figure 20.
  • Figure 26 is a front elevational view of the working head in the third embodiment of the present invention.
  • Figure 27 is a perspective exploded view of the working head shown in Figure 26.
  • FIG. 28 is a perspective view of a working head in a fourth embodiment of the present invention.
  • Figure 29 is a perspective view of a working head in a fifth embodiment of the present invention.
  • the corresponding component numbers in the illustration are as follows:
  • recessed portion 342. stud 61. working portion 61. bottom surface 35. driving portion 62. mounting portion 62. first side wall 35 1 . flange 621. first body 63. second side wall 352. 622. second body 7. first body 353. base 623. inner mounting hole 8. second body 354. convex tip 624. outer mounting hole 81. middle hole 36. driving portion 625. recessed portion 82. rib 361 Flange 700. Working head 83. Recessed portion 362. Projection portion 71. Working portion 0. Main unit 363. Convex point 72. Connection portion 00. Multifunction machine 37. Drive unit 73. Mounting portion 1. Locking device 371. Flange 62. first side wall 35 1 . flange 621. first body 63. second side wall 352. 622. second body 7. first body 353. base 623. inner mounting hole 8. second body 354. convex tip 624. outer mounting hole 81. middle hole 36. driving portion 625. recessed portion 82. rib 361 Flange 700. Working head 83
  • the invention provides a working head which can be applied to a swing type power tool (such as a multifunction machine) or a rotary type grinding power tool (such as a sander), the work head includes a mounting portion, and the mounting portion is provided with an internal mounting hole And an outer mounting hole, the inner mounting hole includes a center hole and at least two protrusions extending outward from the center hole; the outer mounting hole includes at least two openings, the openings are distributed at a circumference centered on a center of the center hole on.
  • the inner mounting hole and the outer mounting hole can be matched with at least two types of output shafts, thereby greatly improving the versatility of the working head, reducing the trouble of the user to replace different types of working heads, and making the user more convenient.
  • a first embodiment of the present invention discloses a working head 100 that is mounted on a multifunction machine 200.
  • the working head 100 is specifically a straight saw blade. It will be readily apparent to those skilled in the art that the working head 100 can also be other accessories such as a circular saw blade, a sand disc, a scraper, and the like.
  • the multifunction machine 200 described above includes a main body 20 and a locker 21 for fixing the work head 100 to the main body 20.
  • the main body 20 can output a rotational reciprocating oscillating torque including a housing 22 and an output shaft 23, which are partially shown in the drawings.
  • the output shaft 23 is longitudinally disposed inside the casing 22, and its end extends a certain distance from the casing 22.
  • a motor (not shown) and an eccentric transmission mechanism (not shown) connected between the motor shaft of the motor and the output shaft 23 are provided in the housing 22, and the motor shaft drives the output shaft 23 through the eccentric transmission mechanism, and the output shaft 23 Rotating the reciprocating oscillating motion about its own axis X.
  • the eccentric transmission mechanism is a common structure used by the industry for oscillating power tools, and will not be described in detail herein.
  • the output shaft 23 rotates the reciprocating oscillating motion about its own axis X at a high frequency of about 5,000 to 30,000 times per minute, and maintains a small swing angle of between about 0.5 and 7 degrees.
  • the lock 21 is passed through the work head 100 and further connected to the output shaft 23, thereby fixing the work head 100 to a drive portion (not shown) at the end of the output shaft 23.
  • the lock 21 includes a bolt 21 1 and a pressure plate 212 that is sleeved on the bolt 21 1 .
  • the pressure plate 212 is an elastic gasket and is fixedly connected to the bolt 21 1 and cannot be separated. After the fastener 21 is tightened, the pressure plate 212 elastically abuts against the side of the working head 100 to prevent the working head 100 from coming loose due to reciprocating or even impact loads.
  • the working head 100 is mounted on a driving portion at the end of the output shaft 23, and includes a mounting portion 1 1 mated with the output shaft 23, a working portion 12 parallel to the mounting portion 11 and a mounting portion 1 A connection portion 13 between the working portion 12.
  • the free end of the working portion 12 forms a serration, and the other end is The connecting portion 13 is connected.
  • the connecting portion 13 extends obliquely such that the mounting portion 11 and the working portion 13 are located in two parallel planes.
  • the mounting portion 11 of the working head 100 specifically includes an inner mounting hole 14, a center hole 141, and an outer mounting hole 15 to be mated with a different type of driving portion of the output shaft 23.
  • the center hole 141 is disposed at the center of the mounting portion 14 and has a center 143, and the inner mounting hole 14 includes a plurality of projections 142 extending outward from the center hole 141.
  • the side of the mounting portion 11 opposite to the working portion 12 is formed with an outer edge 111, and the outer edge 111 is further provided with a notch 112 having a substantially "U" shape.
  • the notch 112 is in communication with the central hole 141, and has opposite side edges 113.
  • the two sides 113 form an angle of 60 degrees, so that when the mounting portion 11 is engaged with the output shaft 23, the side 113 and the output shaft 23
  • the drive unit is matched to transmit torque.
  • the angle of the notch 112 can also be set to an angle other than 60 degrees.
  • the projections 142 of the inner mounting holes 14 are evenly spaced to enable the working head 100 to engage the output shaft 23 at a plurality of rotational angles.
  • the protrusions 142 are specifically five, and are evenly distributed on the portion of the mounting portion 11 other than the notch 112, and the interval between the adjacent protrusions 142 is 45 degrees.
  • three protrusions 142 spaced at 90 degrees are respectively penetrated from the outer mounting hole 15, and the other two protrusions 142 have a circular arc-shaped tip 144.
  • the outer mounting hole 15 includes a plurality of openings 151 which are distributed on a circumference centered on the center 143 of the center hole 141 and are uniformly disposed.
  • the number of the openings 151 of the outer mounting hole 15 is nine, and the adjacent openings 151 are spaced by 30 degrees.
  • Each of the openings 151 has a longitudinal centerline 152 that passes through the center 143, and the apertures 151 are symmetrically disposed with respect to the centerline 152.
  • the opening 151 includes an inner section 153 and an outer section 154 which are radially disposed in sequence, and the inner section 153 is closer to the center 143 than the outer section 154.
  • the inner section 153 has a rectangular cross section
  • the outer section 154 has a circular cross section.
  • the width of the inner segment 153 in the direction perpendicular to the center line 152 is D1.
  • the width of the outer segment 154 in the direction perpendicular to the center line 152 is D2.
  • D2 is greater than D1, so that the output is outputtable.
  • the different shapes of the shaft 23 match.
  • the working head 100 in the present embodiment has a recessed portion 16 in addition to the inner mounting hole 14 and the outer mounting hole 15 that are coupled to the different types of the output shaft 23, and the inner side wall of the recessed portion 16 forms a specific shape. , to mate with the corresponding type of output shaft 23.
  • the mounting portion 11 has a mating surface 114 that is perpendicular to the axis X, and the recessed portion 16 is recessed axially downward from the mating surface 114.
  • the recess 16 is disposed around the central aperture 141 and has a bottom surface 161 that is parallel to the mating surface 114 and a sidewall that is perpendicular to the bottom surface 161.
  • the side wall of the recess 16 may not be perpendicular to The bottom surface 161.
  • the sidewalls are specifically divided into groups, each group includes a first sidewall 162 and a second sidewall 163, and the first sidewall 162 and the second sidewall 163 are respectively located at the center 143. On the side of the square, an angle of 150 degrees is formed between the first side wall 162 and the second side wall 163.
  • the mounting portion 11 of the working head 100 is formed by superposing the first body 17 and the second body 18, and the recess portion 16 is formed.
  • the bottom surface 161 of the recessed portion 16 is located on the first body 17, and the first side wall 162 and the second side wall 163 of the recessed portion 16 are formed on the second body 18.
  • the thickness of the first body 17 and the second body 18 ranges from 0.5 to 1 mm, wherein the first body 17 is preferably 0.8 mm, and the thickness of the second body 18 is preferably 0.6 mm, as long as the second body is secured.
  • the thickness of 18 may be 0.5 to 3 times the thickness of the first body 17.
  • the mounting portion of the working head of the present invention is not limited to being a separate body, and may be integrally formed.
  • the first body 17 and the second body 18 are each stamped from flat plate material and fixed together by pressure welding, and are not separable. Of course, it can also be fixed together by other means, such as riveting, bonding, bolting, and the like.
  • the first body 17 is integrally formed with a central hole 141, an inner mounting hole 14, an outer mounting hole 15, and a notch 112.
  • the inner mounting hole 14 includes a protrusion 142 extending radially outward from the center hole 141
  • the outer mounting hole 15 includes nine openings 151 distributed on a circumference centered on the center 143 of the center hole 141, and three projections 142 and openings 151 in the "ten" direction are respectively communicated.
  • the notch 112 penetrates the center hole 141 and has both side edges 113.
  • the second body 18 is substantially square, on which the outer mounting hole 15 and the notch 112 are integrally formed.
  • the middle portion 18 of the second body 18 is provided with a middle hole 181 having a size larger than the center hole 141.
  • the nine holes 151 of the outer mounting hole 15 are communicated with the center hole 181, and eight ribs 182 are formed between the adjacent holes 151.
  • the first side wall 162 and the second side wall 163 of the recess 16 described above are formed on one side of each of the ribs 182 toward the middle hole 181, and the first side wall 162 and the second side wall 163 form 150 degrees. Sharp corners.
  • two ribs 182 are opposed to the projections 142 of the inner mounting hole 14 and are respectively formed with arcuate recesses 183 matching the tips 144 of the projections 142.
  • the stamped first body 17 and the second body 18 are axially superimposed such that the center 143 of the center hole 141 is aligned with the center of the center hole 181, and the external mounting on the first body 17 and the second body 18 is performed.
  • the openings 151 of the holes 15 are aligned, respectively, and finally, the two are welded together.
  • the structure and manufacturing process of the working head 100 have been described in detail above, and the working head 100 of the present embodiment can be fitted with various types of output shafts 23 by having the above configuration.
  • the output shafts of the working head 100 and the eight different types of multifunction machines 200 are respectively described below with reference to FIGS. 6 to 20. Coordination situation.
  • the output shaft 23 of the first multi-function machine 200 has a drive portion 30 having a flange 301 and a plurality of bosses 302 extending axially from the flange 301.
  • the flange 301 is circular in cross section and has a center 303.
  • the studs 302 have a total of twelve and are rectangular in cross section with a center 304.
  • the centers 304 of the twelve studs 302 are evenly distributed on the circumference centered on the center 303, and therefore, the adjacent studs 302 are spaced 30 degrees apart.
  • the working head 100 When the working head 100 is mounted to the output shaft 23, its outer mounting hole 15 is engaged with the driving portion 30 of the output shaft 23.
  • the boss 302 of the driving portion 30 is received in the opening 151 of the outer mounting hole 15 and is located substantially at the outer portion 154 of the opening 151.
  • the output shaft 23 stably transmits the torque to the working head 100, thereby causing the working head 100 to swing back and forth to perform a cutting or the like.
  • the working head 100 can be rotationally coupled with the drive portion 30 of the output shaft 23 between twelve positions to achieve multiple angles of operation.
  • the output shaft 23 of the second multifunction machine 200 has a drive portion 31. Similar to the structure of the driving portion 30 shown in Fig. 6, the driving portion 31 has a circular flange 311 and twelve rectangular studs 312 extending axially from the flange 311. The only difference is that the center of the stud 312 is spaced to the center of the flange 311 by a small distance. Therefore, when the working head 100 is engaged with the driving portion 31, the stud 312 is located substantially in the inner portion 153 of the opening 151 of the outer mounting hole 15. Similarly, the working head 100 is rotatably coupled to the driving portion 31 of the output shaft 23 at twelve positions.
  • the output shaft 23 of the third multifunction machine 200 has a drive portion 32. Similar to the structure of the driving portion 30 shown in FIG. 6, the driving portion 32 has a circular flange 321 and a plurality of protrusions 322 extending axially from the flange 321 . The only difference is that there are only eight studs 322, the cross section is substantially elliptical, and the center of the stud 322 is small to the center of the flange 311.
  • the studs 322 are arranged in groups of two, and the adjacent groups are spaced 90 degrees apart, and the two studs 322 in each set of the studs 322 are spaced 30 degrees apart.
  • the working head 100 can be rotationally coupled to the drive portion 32 of the output shaft 23 at eight positions, respectively.
  • the stud 322 is located substantially between the inner portion 153 of the opening 151 of the outer mounting hole 15 and the outer portion 154.
  • the output shaft 23 of the fourth multifunction machine 200 has a drive portion 33. Similar to the structure of the driving portion 32 shown in FIG. 10, the driving portion 33 has a circular flange 331 and a plurality of protrusions 332 extending axially from the flange 331. The only difference is that the studs 332 are four and have a substantially circular cross section. Obviously, the working head 100 can be rotatably coupled to the driving portion 33 of the output shaft 23 at four positions. When the working head 100 is engaged with the driving portion 33, the stud 332 is located substantially between the inner portion 153 and the outer portion 154 of the opening 151 of the outer mounting hole 15. As shown in FIGS.
  • the output shaft 23 of the fifth multifunction machine 200 has a drive portion 34. Similar to the structure of the driving portion 30 shown in FIG. 6, the driving portion 34 has a circular flange 341 and a plurality of bosses 342 extending axially from the flange 341. The difference is that the protrusion 342 is disposed on the back surface of the flange 341, and the protrusion 342 is in the shape of a truncated cone.
  • the working head 100 When the working head 100 is mounted, the working head 100 needs to be installed from one side of the output shaft 23 through the notch 12 thereof. Output on the shaft 23. Obviously, the working head 100 can be rotationally coupled to the drive portion 34 of the output shaft 23 at twelve positions, respectively.
  • the stud 342 When the working head 100 is engaged with the driving portion 34, the stud 342 is located substantially in the inner portion 153 of the opening 151 of the outer mounting hole 15. Since the cross section of the inner section 153 is a part of a circle, the boss 342 and the inner section 153 of the opening can be closely fitted, so that the torque can be stably transmitted.
  • the output shaft 23 of the sixth multifunction machine 200 has a drive portion 35.
  • the driving portion 35 includes a flange 351 and a projection 352 extending axially from a central portion of the flange 351.
  • the projection 352 includes a cylindrical base 353 and four arcuate projections 354 extending radially outward from the base 353.
  • the adjacent projections 354 are 90 degrees apart and continuously connected.
  • the center hole 141 and the inner mounting hole 14 cooperate with the projection 352.
  • the base 353 of the projection 352 is engaged with the central hole 141, and the projection 354 of the projection 352 extends into the corresponding projection 142 of the inner mounting hole 14, respectively.
  • the output shaft 23 transmits torque to the working head 100 through the driving portion 35 by the engagement of the projection 354 and the projection 142. Since the number of the projections 142 is five, the working head 100 can be rotationally fitted to the driving portion 35 of the output shaft 23 at five positions, respectively.
  • the output shaft 23 of the seventh multifunction machine 200 has a drive portion 36. Similar to the structure of the driving portion 35 shown in Fig. 16, the driving portion 36 includes a flange 361 and four projections 352 extending axially from the central portion of the flange 351. Adjacent projections 352 are provided separately and spaced 90 degrees apart.
  • the projection 362 has a generally triangular cross section that includes a circular arcuate projection 363 that extends radially outward. When the working head 100 is engaged with the driving portion 36, the projections 363 of the projections 362 extend into the corresponding projections 142 of the inner mounting holes 14, respectively.
  • the output shaft 23 transmits torque to the working head 100 through the driving portion 36 by the engagement of the projection 363 and the projection 142. Similarly, the working head 100 is rotatably coupled to the drive portion 36 of the output shaft 23 at five positions.
  • the output shaft 23 of the eighth multifunction machine 200 has a drive portion 37.
  • the driving portion 37 includes a flange 371 and a protruding portion 362 extending axially from the flange 371.
  • the protruding portion 362 has a regular hexagonal cross section and has six mating edges 373.
  • the working head 100 can be engaged with a different type of driving portion of the output shaft 23 by providing the inner mounting hole 14 and the outer mounting hole 15, to expand the versatility of the working head 100. Further, the working head 100 is further provided with a recessed portion 16 which can be fitted to the corresponding shape of the driving portion of the output shaft 23, so that the versatility of the working head 100 can be further improved. In addition to providing the recesses 16, the working head of the present invention can be further extended to further extend the versatility of the working head.
  • the working head of the present invention is not limited to the specific structure of the first embodiment described above, and the working head may not be provided with a notch, and the interval between adjacent protrusions of the inner mounting hole of the working head may also be selected to be 180 degrees. Any one of 120 degrees, 90 degrees, 72 degrees, 60 degrees, and 30 degrees, preferably less than or equal to 120 degrees; an interval angle between adjacent protrusions of the outer mounting hole of the working head may also be selected as 1 80 degrees, 120 degrees Any of degrees, 90 degrees, 72 degrees, 60 degrees, and 45 degrees, preferably 120 degrees or less.
  • the shape of the driving portion corresponding to the output shaft of the power tool that can be mated needs to be changed accordingly.
  • a working head 400 which includes a mounting portion 41 and an adapter 42 detachably mounted on the mounting portion 41.
  • the mounting portion 41 has the same structure as the first body 17 of the mounting portion 1 1 of the working head 100 in the first embodiment, and includes an inner mounting hole 41 1 and an outer mounting hole 412.
  • the adapter 42 is an annular base 421, a through hole 422 in the middle of the base 421, and a cylinder 423 extending from the lower surface of the base 421.
  • the through hole 422 has a regular hexagonal cross section, and the cross section of the cylinder 423 is Round.
  • the adapter 42 is engaged with the regular hexagonal projection 362 of the driving portion 37 through its regular hexagonal through hole 422 to transmit the torque of the output shaft 23 to the working head 400.
  • the adapter 42 is not required to be used, and the adapter 42 can be detached only through the inner mounting hole 411 or the second mounting hole 412 of the mounting portion 41 and the output.
  • the drive portion of the shaft 23 is fitted.
  • the through hole can also be provided in a shape other than the regular hexagon so as to be compatible with the output shaft having the corresponding shape driving portion.
  • the working head 500 of the present embodiment has substantially the same structure as the working head 100 of the first embodiment, and the working head 500 includes a mounting portion 5 1 and a mounting portion 5 1 is formed by superposing a first body 52 and a second body 53.
  • First body 52 structure and first In the embodiment, the first body 17 of the working head 100 has the same structure, and is provided with a central hole 520, an inner mounting hole 521 and an outer mounting hole 522.
  • the second body 53 is provided with an outer mounting hole 531, which is different from the second body 18 of the first embodiment in that the outer mounting hole 53 1 has a substantially rectangular cross section and a constant radial width of 2. 1 mm.
  • the disclosed working heads are straight saw blades, but the working head of the present invention is not limited to a straight saw blade, and may be other accessories that are easily conceivable by those skilled in the art, such as Circular saw blades, sand plates, scrapers, etc.
  • the fourth and fifth embodiments of the present invention will be described with reference to Figs. 28 and 29, respectively, taking a circular saw blade and a sand plate as examples.
  • a fourth embodiment of the present invention discloses a work head 600 that can be mounted on a multifunction machine, and in particular, a circular saw blade.
  • the working head 600 is substantially fan-shaped and includes a sector-shaped working portion 61 having a curvature of 240 degrees and a mounting portion 62 connected to the working portion 61.
  • the mounting portion 62 has substantially the same structure as the mounting portion 11 of the working head 100 in the first embodiment, and is also formed by stacking the first body 621 and the second body 622, and includes a driving unit different from the output shaft of the multi-function machine.
  • the mating inner mounting hole 623, the outer mounting hole 624, and the recess 625 are not mentioned here.
  • a fifth embodiment of the present invention discloses a work head 700 which can be mounted on a multifunction machine, and in particular, a sand board.
  • the work head 700 includes a substantially triangular working portion 71, a connecting portion 72 mounted on the working portion 71, and a mounting portion 73 connected to the connecting portion 72.
  • the working portion 71 has a flat shape, and the connecting portion 72 extends vertically from the mating surface of the working portion 71.
  • the mounting portion 73 is also flat and has the same shape as the mounting portion 11 of the working head 100 in the first embodiment. Let me repeat.
  • the inner mounting hole and the outer mounting hole provided by the working head of the present invention may be provided in the form of a through hole or in the form of a groove, as long as the inner mounting hole and the outer mounting hole can be matched with the corresponding power.
  • the cross-sectional shape of the drive portion of the output shaft of the tool may be matched.

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Abstract

一种工作头（100），能够安装至动力工具的输出轴（23）上，该工作头（100）设有与所述输出轴（23）配合的安装部（11），所述安装部（11）上设有具有中心的中心孔（141）；所述安装部（11）上还设有内部安装孔（14）和外部安装孔（15），所述外部安装孔（15）在径向上位于所述内部安装孔（14）之外；所述内部安装孔（14）包括自所述中心孔（141）向外延伸的至少两个凸起（142）；所述外部安装孔（15）包括至少两个开孔（151），所述开孔（151）分布在以所述中心为圆心的圆周上；所述开孔（151）包括径向依次设置的内部段（153）和外部段（154），所述内部段（153）的最大宽度大于所述外部段（154）的最大宽度；所述安装部（11）具有外边缘（111），所述安装部（11）上设有自所述外边缘（111）贯通至所述中心孔（141）的缺口。所述外部安装孔（15）和所述内部安装孔（14）能够与至少两种不同类型的所述输出轴配合，从而提高了工作头的通用性。

Description

工作头 技术领域
本发明涉及一种工作头， 特别是涉及一种用于适配到能够被旋转往复驱 动的输出轴的轴端的工作头。
背景技术
多功能机是业界常见的手持式摆动动力工具， 它的工作原理是输出轴围 绕自身的轴心线做摆动运动。 因此， 当用户在输出轴的自由端上安装有不同 的工作头后， 如直锯片、 圆锯片、 三角形磨砂盘、 铲型刮刀后， 可以实现多 种不同的操作功能， 如锯、 切、 磨、 刮等， 以适应不同的工作需求。
多功能机的工作原理是： 在多功能工具本体内装有电机驱动器， 并通过 拨叉带动安装于球面轴承中的偏心输出轴做振荡运动， 从而带动工作元件做 振荡运动， 实现对待加工件的加工。 不同的工作元件有不同的专门的用途， 比如用于切割的锯片、 用于打磨的砂纸等， 其中， 锯片是多功能工具上很常 用的一种工作元件。
目前， 市场上有几种品牌的多功能工具， 例如 Bosch、 D remeU Fei n , Po rter-Cable , WORX , 每种品牌的多功能工具都配有各自品牌的工作元件， 但是各品牌之间的工作元件却不能通用， 也就是说， 当使用者购买了某种品 牌的多功能工具后， 如果需要购买可更换的工作元件， 他只能购买此品牌的 工作元件， 而其他品牌的工作元件无法安装到其拥有的多功能工具上。 因此， 现有的工作元件不具有很好的通用性， 这给使用者带来了烦恼。
因此， 实有必要提供一种改进的动力工具， 以解决上述问题。
发明内容
本发明的目的在于提供一种用于安装至动力工具上的工作头， 该工作头 能够与不同类型动力工具的输出轴相配接。
为实现上述目 的， 本发明所釆用的技术方案如下：
一种工作头， 能够安装至动力工具的输出轴上， 该工作头设有与所述输 出轴配合的安装部， 所述安装部上设有具有中心的中心孔， 其中， 所述安装 部上还设有内部安装孔和外部安装孔， 所述内部安装孔包括自所述中心孔向 外延伸的至少两个凸起； 所述外部安装孔包括至少两个开孔， 所述开孔分布 在以所述中心为圆心的圆周上； 所述外部安装孔在径向上位于所述内部安装 孔之外， 所述外部安装孔和所述内部安装孔能够与至少两种不同类型所述输 出轴分别配接。
优选地， 所述安装部具有外边缘， 所述安装部上设有自所述外边缘贯通 至所述内部安装孔的缺口。
优选地， 所述缺口相对所述中心孔的中心呈 60夹角。
优选地， 所述开孔的横截面为中心对称图形， 具有穿过所述中心且径向 延伸的中心线。
优选地， 所述开孔包括径向依次设置的内部段和外部段， 所述内部段相 比所述外部段距离所述内部安装孔的中心较近， 在垂直于所述中心线的方向 上， 所述内部段的最大宽度大于所述外部段的最大宽度。
优选地， 所述外部段的横截面为矩形， 所述内部段的横截面为圆形的一 部分， 所述内部段的直径大于所述外部段的横向宽度。
优选地， 所述内部安装孔的至少一个凸起与所述外部安装孔的一个开孔 连通。
优选地， 所述内部安装孔的相邻凸起之间相对于所述中心的圆周向夹角 小于等于 120度， 所述外部安装孔的相邻开孔之间相对于所述中心的圆周向 夹角小于等于 120度。
优选地， 所述内部安装孔的相邻凸起之间相对于所述中心的圆周向夹角 为 45度， 所述外部安装孔的相邻开孔之间相对于所述中心的圆周向夹角为 30度。
优选地， 所述内部安装孔具有五个凸起， 所述外部安装孔具有九个开孔， 所述内部安装孔的间隔 90度的三个凸起分别与所述外部安装孔的三个开孔 在径向上重合
优选地， 所述安装部具有朝向所述输出轴的配合面， 所述配合面上围绕 所述中心孔形成有凹陷部， 所述凹陷部具有底面， 所述内部安装孔设置在所 述底面上， 所述内部安装孔和所述凹陷部能够与至少两种不同类型所述动力 工具的输出轴分别配合。
优选地， 所述输出轴设有与所述安装部配合的驱动部， 所述凹陷部至少 包括与所述驱动部啮合的第一侧壁和第二侧壁， 所述凹陷部通过与所述第一 侧壁和第二侧壁的配合， 将扭矩传递至所述安装部。
优选地， 所述第一侧壁和第二侧壁位于以所述中心孔的中心为中心的正 多边形或正多角形的边上。
优选地， 所述安装部由平行设置的第一本体和第二本体叠加而成， 所述 第一本体具有支撑第二本体的支撑面， 所述凹陷部的底面形成在所述第一本 体的支撑面上， 所述第一侧壁和第二侧壁形成在所述第二本体上。
优选地， 所述内部安装孔和所述中心孔位于所述第一本体上， 所述外部 安装孔贯穿所述第一本体和所述第二本体， 所述第二本体的中部开设有尺寸 大于所述中心孔的中孔， 位于所述第二本体上的所述外部安装孔连通所述中 孔。
优选地， 所述第一本体和第二本体的厚度范围为 0.5~ 1 毫米。
优选地， 所述第二本体的厚度是所述第一本体的厚度的 0.5~3倍。
优选地， 所述安装部上可拆卸地安装有转接器， 所述转接器朝向所述工 作头的一侧设有至少两个与所述外部安装孔的开孔配合的凸柱， 所述转接器 的中部设有能够与所述输出轴配合的第三安装孔。
优选地， 所述第三安装孔的横截面为正多边形或正多角形的一种。
本发明的工作头通在其安装部上设置中心孔、内部安装孔和外部安装孔， 内部安装孔包括自 中心孔向外延伸的至少两个凸起， 外部安装孔包括至少两 个开孔， 该等开孔分布在以中心孔的中心为圆心的圆周上。 内部安装孔和外 部安装孔能够与至少两种类型的输出轴分别配合， 从而大大提高了工作头的 通用性， 减少用户更换不同种类工作头的烦恼， 更方便用户使用。
为实现上述目 的， 本发明所釆用的另一种技术方案如下：
一种工作头， 能够安装至动力工具的输出轴上， 该工作头设有与所述输 出轴配合的安装部， 所述安装部设有具有中心的中心孔及朝向所述输出轴的 配合面， 其中， 所述安装部围绕所述中心孔自所述配合面形成有凹陷部， 所 述凹陷部具有底面， 所述安装部自所述底面沿远离所述配合面的方向开设有 内部安装孔， 所述内部安装孔和所述凹陷部能够与至少两种不同类型所述动 力工具的输出轴分别配合。
优选地， 所述输出轴设有与所述安装部配合的驱动部， 所述凹陷部至少 包括与所述驱动部啮合的第一侧壁和第二侧壁， 所述凹陷部通过与所述第一 侧壁和第二侧壁的配合， 将扭矩传递至所述安装部。
优选地， 所述第一侧壁和第二侧壁位于以所述中心孔的中心为中心的正 多边形或正多角形的边上。
优选地， 所述安装部包括相叠加的第一本体和第二本体， 所述第一本体 具有支撑所述第二本体的支撑面， 所述凹陷部的底面形成在所述第一本体的 支撑面上， 所述第一侧壁和第二侧壁形成在所述第二本体上。 优选地， 所述安装部上开设有位于所述内部安装孔之外且贯穿所述第一 本体和所述第二本体的外部安装孔， 所述第二本体的中部开设有尺寸大于所 述中心孔的中孔， 位于所述第二本体上的所述外部安装孔连通所述中孔。
优选地， 所述第一本体和第二本体的厚度范围为 0.5~ 1 毫米。
优选地， 第二本体的厚度是所述第一本体的厚度的 0.5 ~3倍。
优选地， 所述内部安装孔包括自所述中心孔向外延伸的至少两个凸起。 优选地， 所述安装部包括外部安装孔， 所述外部安装孔包括至少两个开 孔， 该等开孔分布在以所述中心孔的中心为圆心的圆周上， 且在径向上位于 所述内部安装孔之外。
优选地， 所述开孔的横截面为中心对称图形， 具有穿过所述中心且径向 延伸的中心线。
优选地， 所述开孔包括径向依次设置的内部段和外部段， 所述内部段相 比所述外部段距离所述中心较远， 在垂直于所述中心线的方向上， 所述内部 段的最大宽度大于所述外部段的最大宽度。
优选地， 所述外部段的横截面为矩形， 所述内部段的横截面为圆形的一 部分， 所述内部段的直径尺寸大于所述外部段的横向宽度。
优选地， 至少一个所述内部安装孔的凸起与一个所述外部安装孔的开孔 连通。
优选地， 所述内部安装孔的相邻凸起之间相对于所述中心的圆周向夹角 小于等于 1 20度， 所述外部安装孔的相邻开孔之间相对于所述中心的圆周向 夹角小于等于 1 20度
优选地， 所述内部安装孔的相邻凸起之间相对于所述中心的圆周向夹角 为 45度， 所述外部安装孔的相邻开孔之间相对于所述中心的圆周向夹角为 30度。
优选地， 所述内部安装孔具有五个凸起， 所述外部安装孔具有九个开孔， 所述内部安装孔的间隔 90度的三个凸起分别与所述外部安装孔的三个开孔 在径向上重合
优选地， 所述安装部具有外边缘， 所述安装部上设有自所述外边缘贯通 至所述中心孔的缺口。
优选地， 所述缺口相对所述中心孔的中心呈 60夹角。
本发明的工作头通过在其安装部上设置凹陷部， 并在凹陷部的底面开设 内部安装孔， 使凹陷部和内部安装孔能够与不同类型动力工具的输出轴分别 配接， 从而大大提高了工作头的通用性， 减少用户更换不同种类工作头的烦 恼， 更方便用户使用。
附图说明
图 1为本发明第一实施方式中工作头安装至动力工具后的组合示意图。 图 2为图 1所示工作头的立体示意图。
图 3为图 2所示工作头的背面立体示意图。
图 4为图 2所示工作头的正视图。
图 5为图 2所示工作头的立体分解示意图。
图 6为第一种图 1所示动力工具的输出轴的立体示意图。
图 7为图 2所示工作头与图 6所示输出轴配合后的示意图。
图 8为第二种图 1所示动力工具的输出轴的立体示意图。
图 9为图 2所示工作头与图 8所示输出轴配合后的示意图。
图 10为第三种图 1所示动力工具的输出轴的立体示意图。
图 11为图 2所示工作头与图 10所示输出轴配合后的示意图。
图 12为第四种图 1所示动力工具的输出轴的立体示意图。
图 13为图 2所示工作头与图 12所示输出轴配合后的示意图。
图 14为第五种图 1所示动力工具的输出轴的立体示意图。
图 15为图 2所示工作头与图 14所示输出轴配合后的示意图。
图 16为第六种图 1所示动力工具的输出轴的立体示意图。
图 17为图 2所示工作头与图 16所示输出轴配合后的示意图。
图 18为第七种图 1所示动力工具的输出轴的立体示意图。
图 19为图 2所示工作头与图 18所示输出轴配合后的示意图。
图 20为第八种图 1所示动力工具的输出轴的立体示意图。
图 21为图 2所示工作头与图 20所示输出轴配合后的示意图。
图 22为图 2所示工作头与图 20所示输出轴配合后另一方向的示意图 图 23为本发明第二实施方式中工作头的立体示意图。
图 24为图 23所示工作头的立体分解示意图。
图 25为图 23所示工作头与图 20所示输出轴配合后的示意图。
图 26为本发明第三实施方式中工作头的正视图。
图 27为图 26所示工作头的立体分解示意图。
图 28为本发明第四实施方式中工作头的立体示意图。
图 29为本发明第五实施方式中工作头的立体示意图。 图示中的相关元件对应编号如下：
100.工作头 212.压板 400.工作头
11.安装部 22.壳体 41.安装部
111.外边缘 23.输出轴 410.中心孔
112.缺口 301.法兰盘 411 .内部安装孔
113.两侧边 302.凸柱 412.外部安装孔
1 14.配合面 303.中心 42.转接器
12.工作部 304.中心 421.基体
13.连接部 31 .驱动部 422.通孔
14.内部安装孔 3 11.法兰盘 423.柱体
141.中心孔 312.凸柱 500.工作头
142.凸起 32.驱动部 51 .安装部
143.中心 321.法兰盘 52.第一本体
144.尖端 322.凸柱 520.中心孔
15.外部安装孔 33.驱动部 521.内部安装孔
151.开孔 331.法兰盘 522.外部安装孔
152.中心线 332.凸柱 53.第二本体
153.内部段 34.3区动部 531.外部安装孔 54.外部段 341.法兰盘 600.工作头
16.凹陷部 342.凸柱 61.工作部 61.底面 35.驱动部 62.安装部 62.第一侧壁 35 1 .法兰盘 621.第一本体 63.第二侧壁 352.凸出部 622.第二本体 7.第一本体 353.基部 623.内部安装孔 8.第二本体 354.凸尖 624.外部安装孔 81 ·中孔 36.驱动部 625.凹陷部 82.肋部 361 .法兰盘 700.工作头 83.凹部 362.凸出部 71.工作部 0.主机 363.凸尖 72.连接部 00.多功能机 37.驱动部 73.安装部 1.锁固件 371.法兰盘
11.螺栓 373. S己 具体实施方式
下面结合附图及具体实施方式对本发明作进一步的详细说明。
本发明提供一种可应用于摆动类动力工具（如多功能机）或者旋转型研磨 动力工具（如砂光机）上的工作头， 该种工作头包括安装部， 安装部上设置内 部安装孔和外部安装孔， 内部安装孔包括中心孔及自 中心孔向外延伸的至少 两个凸起； 外部安装孔包括至少两个开孔， 该等开孔分布在以中心孔的中心 为圆心的圆周上。 内部安装孔和外部安装孔能够与至少两种类型的输出轴分 别配合， 从而大大提高了工作头的通用性， 减少用户更换不同种类工作头的 烦恼， 更方便用户使用。
请参阅图 1 和图 2 所示， 本发明的第一实施方式中公开了一种工作头 100 ,安装于多功能机 200上。本实施方式中， 工作头 100具体是一种直锯片， 对本领域技术人员来说， 很容易想到， 工作头 1 00也可以是其它附件， 如圆 锯片、 砂盘、 刮刀等。 上述多功能机 200 包括主机 20 和用于将工作头 100 固定在主机 20上的锁固件 21。
主机 20可输出旋转往复的摆动扭矩， 其包括在图中部分示出的壳体 22 和输出轴 23。 输出轴 23 纵向设置于壳体 22 的内部， 其末端延伸出壳体 22 一定距离。 壳体 22 内设有电机（未图示） 以及连接在电机的电机轴和输出轴 23之间的偏心传动机构（未图示）， 电机轴通过偏心传动机构带动输出轴 23 , 并使输出轴 23 围绕其自身的轴线 X旋转往复摆动运动。 偏心传动机构为业 界应用于摆动动力工具的常用结构， 在此不再详细赘述。
本实施方式中， 主机 20工作时， 输出轴 23绕其自身轴线 X以每分钟约 5000至 30000次的高频率旋转往复摆动运动， 并保持在约 0.5至 7度之间的 小摆动角度。
锁固件 21 穿过工作头 100进而连接到输出轴 23 内， 从而将工作头 100 固定在输出轴 23末端的驱动部 （未图示） 上。 该锁固件 21 包括螺栓 21 1及 套设在螺栓 21 1 上的压板 212。 本实施方式中， 压板 212为一弹性垫片， 且 与螺栓 21 1相对固定连接， 不可拆分。 锁固件 21拧紧后， 压板 212弹性抵靠 在工作头 1 00的一侧， 可防止由于往复甚至冲击式载荷的情况下而导致工作 头 1 00松脱。
参考图 2至图 4 , 工作头 100安装在输出轴 23末端的驱动部上， 其包括 与输出轴 23 配接的安装部 1 1、 与安装部 1 1 平行的工作部 12及位于安装部 1 1和工作部 12之间的连接部 13。 工作部 12的自由端形成锯齿， 另一端则与 连接部 13连接。 连接部 13倾斜延伸， 使安装部 11和工作部 13位于两个相 平行的平面内。
本实施方式中， 工作头 100 的安装部 11 具体包括内部安装孔 14、 中心 孔 141和外部安装孔 15, 以与输出轴 23不同类型的驱动部配接。 中心孔 141 设置在安装部 14的中央， 并具有中心 143, 内部安装孔 14包括自中心孔 141 向外延伸的若干凸起 142。
安装部 11 与工作部 12相对的一侧形成有外边缘 111, 外边缘 111 上进 一步开设有大致呈 "U" 型的缺口 112。 缺口 112与中心孔 141连通， 其具有 相对设置的两侧边 113, 两侧边 113形成的夹角为 60度， 以使安装部 11 与 输出轴 23配合时， 侧边 113 可以与输出轴 23的驱动部相配合， 以传递扭矩。 显然， 缺口 112的夹角也可以设置为除 60度以外的其它角度。
内部安装孔 14的凸起 142均匀间隔设置，以使工作头 100能够在多个旋 转角度与输出轴 23配合。 本实施方式中， 凸起 142具体为五个， 均匀分布在 安装部 11上缺口 112以外的部分， 相邻凸起 142之间间隔为 45度。 其中， 间隔 90度的三个凸起 142分别与外部安装孔 15贯通， 其它两个凸起 142则 具有圆弧形尖端 144。
外部安装孔 15 包括若干开孔 151, 该等开孔 151分布在以中心孔 141 的 中心 143为圆心的圆周上， 且均匀设置。 本实施方式中， 安装部 11上由于设 置了缺口 112, 因此， 外部安装孔 15的开孔 151数量为九个，且相邻开孔 151 间隔 30度。 每个开孔 151均具有穿过中心 143的纵向中心线 152, 开孔 151 相对中心线 152对称设置。 开孔 151 包括径向依次设置的内部段 153和外部 段 154, 内部段 153相比外部段 154, 更靠近中心 143。 另夕卜， 内部段 153的 横截面为矩形， 外部段 154的横截面为圆形的一部分。 内部段 153在垂直于 中心线 152的方向上的宽度为 D1, 对应地， 外部段 154在垂直于中心线 152 的方向上的宽度为 D2, 本实施方式中， D2大于 D1, 从而可与输出轴 23 的 不同形状相匹配。
本实施方式中的工作头 100, 除了具有与不同类型的输出轴 23配接的内 部安装孔 14和外部安装孔 15之外， 还设有凹陷部 16, 凹陷部 16的内侧壁 形成具体的形状， 以与相应类型的输出轴 23配接。
安装部 11具有垂直于轴线 X的配合面 114, 凹陷部 16 自配合面 114轴 向向下凹陷而成。 凹陷部 16 围绕中心孔 141设置， 其具有与配合面 114平行 的底面 161和垂直于底面 161 的侧壁。 显然， 凹陷部 16的侧壁也可不垂直于 底面 161。 本实施方式中， 侧壁具体分为若干组， 每组包括第一侧壁 162和 第二侧壁 163, 且第一侧壁 162和第二侧壁 163分别位于以中心 143为中心 的正十二角形的边上，第一侧壁 162和第二侧壁 163之间形成 150度的夹角。
如图 5所示， 本实施方式中， 工作头 100 的安装部 11是由第一本体 17 和第二本体 18叠加而成，并形成上述凹陷部 16。其中， 凹陷部 16的底面 161 位于第一本体 17上， 凹陷部 16的第一侧壁 162和第二侧壁 163则形成在第 二本体 18上。 通过对安装部 11进行分体设置， 能够使工作头 100的加工更 方便， 且同时能够保证安装部 11的整体厚度较小。 本实施方式中， 第一本体 17和第二本体 18 的厚度范围为 0.5~1 毫米， 其中， 第一本体 17优选为 0.8 毫米， 第二本体 18 的厚度优选为 0.6毫米， 只要保证第二本体 18的厚度为 第一本体 17的厚度的 0.5~3倍即可。 另外， 本发明工作头的安装部并不限于 是分体设置， 也可以是一体成型。
第一本体 17和第二本体 18均釆用平板状板材冲压而成， 并通过压力焊 的方式固定在一起， 不可拆分。 当然也可以釆用其它的方式固定在一起， 如 铆接、 粘接、 螺栓固定等。 第一本体 17上完整地形成有中心孔 141、 内部安 装孔 14、 外部安装孔 15及缺口 112, 其中， 内部安装孔 14包括自中心孔 141 径向向外延伸地凸起 142,外部安装孔 15包括分布在以中心孔 141的中心 143 为圆心的圆周上的九个开孔 151, 且位于 "十" 字方向的三个凸起 142和开 孔 151分别连通。 另外， 缺口 112与中心孔 141贯通， 并具有两侧边 113。
第二本体 18大致呈方形， 其上完整地形成有外部安装孔 15和缺口 112。 第二本体 18 中部开设有尺寸大于中心孔 141 的中孔 181, 外部安装孔 15的 九个开孔 151 均与中孔 181连通， 相邻开孔 151之间则形成八个肋部 182。 每个肋部 182朝向中孔 181的一侧均形成有上文中所述凹陷部 16的第一侧壁 162和第二侧壁 163,第一侧壁 162和第二侧壁 163形成 150度的尖角。另夕卜， 有两个肋部 182与内部安装孔 14的凸起 142相对， 并分别形成有与凸起 142 的尖端 144匹配的圆弧形凹部 183。 加工时， 将冲压好的第一本体 17和第二 本体 18轴向叠加， 使中心孔 141 的中心 143与中孔 181 的中心对齐， 并使第 一本体 17和第二本体 18上的外部安装孔 15的开孔 151分别对齐， 最后， 将 两者焊接在一起。
上文详细描述了工作头 100的结构及制作过程，本实施方式的工作头 100 由于具备了上述结构， 从而能与多种类型的输出轴 23 配合。 下面结合图 6 至图 20, 分别描述工作头 100 与八种不同类型的多功能机 200 的输出轴 23 配合的情况。
如图 6和图 7所示， 第一种多功能机 200的输出轴 23具有驱动部 30 , 该驱动部 30具有法兰盘 301和自法兰盘 301轴向延伸的若干凸柱 302。 法兰 盘 301截面为圆形， 且具有中心 303。 凸柱 302共有十二个， 且截面为矩形， 具有中心 304。 十二个凸柱 302的中心 304均匀分布在以中心 303为圆心的 圆周上， 因此， 相邻凸柱 302之间间隔 30度。
工作头 100安装至输出轴 23上时，其外部安装孔 15与输出轴 23的驱动 部 30配合。 驱动部 30的凸柱 302恰好收容在外部安装孔 15的开孔 151 内， 且大致位于开孔 151 的外部段 154。 此时， 通过凸柱 302与开孔 151 的配合， 输出轴 23将扭矩稳定地传递至工作头 100上，从而带动工作头 100往复摆动 以实现切割等动作。 另外， 工作头 100可在十二个位置之间与输出轴 23的驱 动部 30旋转配合， 以实现多角度的工作。
如图 8和图 9所示， 第二种多功能机 200的输出轴 23具有驱动部 31。 与图 6所示驱动部 30结构相似， 驱动部 31具有圆形法兰盘 311及自法兰盘 311轴向延伸的十二个矩形凸柱 312。 不同之处仅在于， 凸柱 312的中心到法 兰盘 311 的中心间距较小。 因此， 工作头 100与驱动部 31配合时， 凸柱 312 大致位于外部安装孔 15的开孔 151 的内部段 153 内。 同样， 工作头 100可在 十二个位置分别与输出轴 23的驱动部 31旋转配合。
如图 10和图 11所示， 第三种多功能机 200的输出轴 23具有驱动部 32。 与图 6所示驱动部 30结构相似， 驱动部 32具有圆形法兰盘 321及自法兰盘 321轴向延伸若干凸柱 322。 不同之处仅在于， 凸柱 322只有八个， 横截面大 致呈椭圆形，且凸柱 322的中心到法兰盘 311 的中心间距较小。该等凸柱 322 两两一组， 相邻组间隔 90度， 且每组凸柱 322 内的两凸柱 322之间间隔 30 度。 显然， 工作头 100可在八个位置分别与输出轴 23的驱动部 32旋转配合。 工作头 100与驱动部 32配合时，凸柱 322大致位于外部安装孔 15的开孔 151 的内部段 153与外部段 154之间。
如图 12和图 13所示， 第四种多功能机 200的输出轴 23具有驱动部 33。 与图 10所示的驱动部 32结构相似，驱动部 33具有圆形法兰盘 331及自法兰 盘 331 轴向延伸若干凸柱 332。 不同之处仅在于， 凸柱 332为四个， 且横截 面大致呈圆形。 显然， 工作头 100 可在四个位置分别与输出轴 23 的驱动部 33旋转配合。 工作头 100与驱动部 33配合时， 凸柱 332大致位于外部安装 孔 15的开孔 151 的内部段 153与外部段 154之间。 如图 14和图 15所示， 第五种多功能机 200的输出轴 23具有驱动部 34。 与图 6所示的驱动部 30结构相似， 驱动部 34具有圆形法兰盘 341及自法兰 盘 341轴向延伸的若干凸柱 342。 不同之处在于， 凸柱 342设置于法兰盘 341 的背面， 且凸柱 342为圆台状， 工作头 100安装时， 需要使工作头 100通过 其缺口 1 12从输出轴 23的一侧安装到输出轴 23上。 显然， 工作头 100可在 十二个位置分别与输出轴 23的驱动部 34旋转配合。 工作头 100与驱动部 34 配合时， 凸柱 342大致位于外部安装孔 15的开孔 151 的内部段 153 内。 由于 内部段 153的截面为圆形的一部分， 因此， 凸柱 342和开孔的内部段 153能 够紧密配合， 从而可稳定地传递扭矩。
如图 16和图 17所示， 第六种多功能机 200的输出轴 23具有驱动部 35。 与前述驱动部不同，该驱动部 35 包括法兰盘 351及自法兰盘 351 的中部轴向 延伸而成的凸出部 352。 凸出部 352 包括圆柱状基部 353及自基部 353径向 向外延伸的四个圆弧形凸尖 354 , 相邻凸尖 354之间间隔 90度且连续连接。
工作头 100与驱动部 35配合时， 中心孔 141和内部安装孔 14共同和凸 出部 352配合。 具体是， 凸出部 352的基部 353与中心孔 141配合， 凸出部 352的凸尖 354分别延伸至内部安装孔 14的对应凸起 142 内。 通过凸尖 354 和凸起 142的配合， 输出轴 23通过驱动部 35将扭矩传递至工作头 100。 由 于凸起 142的数量为五个， 因此， 工作头 100可在五个位置分别与输出轴 23 的驱动部 35旋转配合。
如图 18和图 19所示， 第七种多功能机 200的输出轴 23具有驱动部 36。 与图 16所示驱动部 35 结构相似， 该驱动部 36 包括法兰盘 361 及自法兰盘 351 的中部轴向延伸而成的四个凸出部 352。 相邻凸出部 352之间单独设置， 且间隔 90度。 凸出部 362的横截面大致呈三角形， 其包括径向向外延伸的圆 弧形凸尖 363。 工作头 100与驱动部 36配合时， 凸出部 362的凸尖 363分别 延伸至内部安装孔 14的对应凸起 142 内。 通过凸尖 363和凸起 142的配合， 输出轴 23通过驱动部 36将扭矩传递至工作头 100。 同样， 工作头 100可在 五个位置分别与输出轴 23的驱动部 36旋转配合。
如图 20至图 22所示， 第八种多功能机 200的输出轴 23具有驱动部 37。 驱动部 37 包括法兰盘 371和自法兰盘 371轴向延伸而出的凸出部 362 , 凸出 部 362 的横截面为正六边形， 具有六条配合边 373。 工作头 100安装至输出 轴 23后， 驱动部 37的凸出部 362恰好收容在安装部 11 的凹陷部 16 内， 凸 出部 362 的配合边 373 可分别与凹陷部 16 的第一侧壁 162或第二侧壁 163 分别配合。 因此， 工作头 100可在九个位置分别与输出轴 23的驱动部 36旋 转配合。
本实施方式中， 工作头 100通过设置内部安装孔 14和外部安装孔 15 , 可与输出轴 23的不同类型的驱动部配合，以扩展工作头 100的通用性。另夕卜， 工作头 100上进一步设置凹陷部 16 , 凹陷部 16能够与输出轴 23的驱动部的 对应形状配合， 从而可进一步的提高工作头 100的通用性。 除了设置凹陷部 16 , 本发明的工作头还可以通过其它方式， 以进一步扩展工作头的通用性。
需要指出， 本发明的工作头并不限于上述第一实施方式的具体结构， 工 作头可以不设置缺口， 工作头的内部安装孔的相邻凸起之间的间隔角度也可 以选择 1 80度、 120度、 90度、 72度、 60度、 30度中的任一种， 优选小于 等于 120度；工作头的外部安装孔的相邻凸起之间的间隔角度也可以选择 1 80 度、 120度、 90度、 72度、 60度、 45度中的任一种， 优选小于等于 120度。 显然， 当工作头结构变化时， 其对应能够配接的动力工具的输出轴的驱动部 形状了需要相应变化。
如图 23至图 25所示， 本发明的第二实施方式中， 揭示了工作头 400 , 包括安装部 41及可拆卸地安装在安装部 41上的转接器 42。 安装部 41 与第 一实施方式中工作头 100的安装部 1 1 的第一本体 17结构相同， 包括内部安 装孔 41 1和外部安装孔 412。 转接器 42为圆环状基体 421、 位于基体 421 中 部的通孔 422及自基体 421 的下表面延伸的柱体 423 , 通孔 422的横截面为 正六边形， 柱体 423的横截面为圆形。 转接器 422安装至安装部 41上时， 通 过柱体 423与外部安装孔 412配合。
工作头 400在使用过程中，需要与图 20所示的第八种多功能机 200的输 出轴 23的驱动部 37配合时， 才需要将转接器 42安装至安装部 41上。 此时， 转接器 42通过其正六边形通孔 422与驱动部 37的正六边形凸出部 362配合， 以将输出轴 23 的扭矩传递至工作头 400。 当与除第八种以外的输出轴 23 配 合时， 则不需要使用转接器 42 , 可将转接器 42拆下， 仅通过安装部 41 的内 部安装孔 411或第二安装孔 412与输出轴 23的驱动部配合。 显然， 通孔也可 以设置为除正六边形以外的其它形状， 从而可与具有对应形状驱动部的输出 轴配合。
如图 26和图 27所示， 为本发明的第三实施方式， 本实施方式的工作头 500与第一实施方式的工作头 100结构基本相同，工作头 500 包括安装部 5 1 , 安装部 5 1 由第一本体 52和第二本体 53叠加而成。 第一本体 52结构与第一 实施方式中工作头 100的第一本体 17结构完全相同， 其上设有中心孔 520、 内部安装孔 521和外部安装孔 522。 第二本体 53上设有外部安装孔 531 , 与 第一实施方式中第二本体 18不同之处在于，外部安装孔 53 1的横截面大致呈 矩形， 其径向上的宽度不变， 为 2. 1 毫米。 釆用该种结构的工作头 500 , 在 与第一实施方式中图 14所示的第五种输出轴 23的驱动部 34配合时，由于驱 动部 34的凸柱 342为圆台状， 装配时， 凸柱 342轴向上依次与第一本体 52 的外部安装孔 522和第二本体 53 的外部安装孔 53 1 配合， 由于外部安装孔 531 与凸柱 342 配合位置的宽度相对于外部安装孔 522较窄， 使工作头 500 整体与第五种输出轴 23的驱动部 34配合更紧密、 更稳定。
上述第一至第三实施方式中， 所揭示的工作头均为直锯片， 但是， 本发 明的工作头并不限于直锯片， 也可以是本领域技术人员很容易想到的其它附 件， 如圆锯片、 砂板、 刮刀等。 下面结合图 28 和图 29 , 介绍本发明的第四 和第五实施方式， 分别以圆锯片和砂板为例。
如图 28所示，本发明的第四实施方式揭示了一种能够安装于多功能机上 的工作头 600 , 具体是一种圆锯片。 该工作头 600 大致呈扇形， 包括弧度为 240度的扇形工作部 61 以及连接在工作部 61上的安装部 62。安装部 62与第 一实施方式中的工作头 100 的安装部 11 的结构基本相同， 同样由第一本体 621 和第二本体 622 叠加而成， 包括可与多功能机输出轴不同类型的驱动部 配合的内部安装孔 623、 外部安装孔 624及凹陷部 625 , 在此不再赞述。
如图 29所示，本发明的第五实施方式揭示了一种能够安装于多功能机上 的工作头 700 , 具体是一种砂板。 该工作头 700 包括大致呈三角形的工作部 71、 安装在工作部 71上的连接部 72 , 以及连接在连接部 72上的安装部 73。 工作部 71为平板状， 连接部 72 自工作部 71 的配合面向上垂直延伸， 安装部 73 同样为平板状且形状和第一实施方式中工作头 100 的安装部 11 结构完全 相同， 在此不再赘述。
需要指出， 本发明的工作头所设置的内部安装孔和外部安装孔， 可以设 置成通孔的形式， 也可以设置成凹槽的形式， 只要保证内部安装孔和外部安 装孔能够与相对应动力工具的输出轴的驱动部的截面形状相匹配即可。

Claims

权 利 要 求 书
1. 一种工作头， 能够安装至动力工具的输出轴上， 该工作头设有与所述输 出轴配合的安装部，所述安装部上设有具有中心的中心孔，其特征在于： 所述安装部上还设有内部安装孔和外部安装孔，所述内部安装孔包括自 所述中心孔向外延伸的至少两个凸起；所述外部安装孔包括至少两个开 孔， 所述开孔分布在以所述中心为圆心的圆周上； 所述外部安装孔在径 向上位于所述内部安装孔之外，所述外部安装孔和所述内部安装孔能够 与至少两种不同类型所述输出轴分别配接。
2. 如权利要求 1所述的工作头， 其特征在于： 所述安装部具有外边缘， 所 述安装部上设有自所述外边缘贯通至所述中心孔的缺口。
3. 如权利要求 2所述的工作头， 其特征在于： 所述缺口相对所述中心孔的 中心呈 60夹角。
4. 如权利要求 1所述的工作头， 其特征在于： 所述开孔的横截面为中心对 称图形， 具有穿过所述中心且径向延伸的中心线。
5. 如权利要求 4所述的工作头， 其特征在于： 所述开孔包括径向依次设置 的内部段和外部段，所述内部段相比所述外部段距离所述内部安装孔的 中心较近， 在垂直于所述中心线的方向上， 所述内部段的最大宽度大于 所述外部段的最大宽度。
6. 如权利要求 5所述的工作头，其特征在于：所述外部段的横截面为矩形， 所述内部段的横截面为圆形的一部分，所述内部段的直径大于所述外部 段的横向宽度。
7. 如权利要求 1所述的工作头， 其特征在于： 所述内部安装孔的至少一个 凸起与所述外部安装孔的一个开孔连通。
8. 如权利要求 1所述的工作头， 其特征在于： 所述内部安装孔的相邻凸起 之间相对于所述中心的圆周向夹角小于等于 120度，所述外部安装孔的 相邻开孔之间相对于所述中心的圆周向夹角小于等于 120度。
9. 如权利要求 8所述的工作头， 其特征在于： 所述内部安装孔的相邻凸起 之间相对于所述中心的圆周向夹角为 45度， 所述外部安装孔的相邻开 孔之间相对于所述中心的圆周向夹角为 30度。
10.如权利要求 9所述的工作头， 其特征在于： 所述内部安装孔具有五个凸
1 起， 所述外部安装孔具有九个开孔， 所述内部安装孔的间隔 90度的三 个凸起分别与所述外部安装孔的三个开孔在径向上重合。
如权利要求 1所述的工作头， 其特征在于： 所述安装部具有朝向所述输 出轴的配合面， 所述配合面上围绕所述中心孔形成有凹陷部， 所述凹陷 部具有底面， 所述内部安装孔设置在所述底面上， 所述内部安装孔和所 述凹陷部能够与至少两种不同类型所述动力工具的输出轴分别配合。 如权利要求 11所述的工作头， 其特征在于： 所述输出轴设有与所述安 装部配合的驱动部，所述凹陷部至少包括与所述驱动部啮合的第一侧壁 和第二侧壁， 所述凹陷部通过与所述第一侧壁和第二侧壁的配合， 将扭 矩传递至所述安装部。
如权利要求 12所述的工作头， 其特征在于： 所述第一侧壁和第二侧壁 位于以所述中心孔的中心为中心的正多边形或正多角形的边上。
如权利要求 12所述的工作头， 其特征在于： 所述安装部包括相叠加的 第一本体和第二本体， 所述第一本体具有支撑所述第二本体的支撑面， 所述凹陷部的底面形成在所述第一本体的支撑面上，所述第一侧壁和第 二侧壁形成在所述第二本体上。
如权利要求 14所述的工作头， 其特征在于： 所述内部安装孔和所述中 心孔位于所述第一本体上，所述外部安装孔贯穿所述第一本体和所述第 二本体， 所述第二本体的中部开设有尺寸大于所述中心孔的中孔， 位于 所述第二本体上的所述外部安装孔连通所述中孔。
如权利要求 14所述的工作头， 其特征在于： 所述第一本体和第二本体 的厚度范围为 0.5~ 1 毫米。
如权利要求 14所述的工作头， 其特征在于： 所述第二本体的厚度是所 述第一本体的厚度的 0.5~3倍。
如权利要求 1所述的工作头， 其特征在于： 所述安装部上可拆卸地安装 有转接器，所述转接器朝向所述工作头的一侧设有至少两个与所述外部 安装孔的开孔配合的凸柱，所述转接器的中部设有能够与所述输出轴配 合的第三安装孔。
如权利要求 18所述的工作头， 其特征在于： 所述第三安装孔的横截面 为正多边形或正多角形的一种。
一种工作头， 能够安装至动力工具的输出轴上， 该工作头设有与所述输
2 出轴配合的安装部，所述安装部设有具有中心的中心孔及朝向所述输出 轴的配合面， 其特征在于： 所述安装部围绕所述中心孔自所述配合面形 成有凹陷部， 所述凹陷部具有底面， 所述安装部自所述底面沿远离所述 配合面的方向开设有内部安装孔，所述内部安装孔和所述凹陷部能够与 至少两种不同类型所述动力工具的输出轴分别配合。
如权利要求 20所述的工作头， 其特征在于： 所述内部安装孔包括自所 述中心孔向外延伸的至少两个凸起。
如权利要求 21所述的工作头， 其特征在于： 所述安装部包括外部安装 孔， 所述外部安装孔包括至少两个开孔， 该等开孔分布在以所述中心孔 的中心为圆心的圆周上， 且在径向上位于所述内部安装孔之外。
如权利要求 22所述的工作头， 其特征在于： 所述开孔的横截面为中心 对称图形， 具有穿过所述中心且径向延伸的中心线。
如权利要求 23所述的工作头， 其特征在于： 所述开孔包括径向依次设 置的内部段和外部段， 所述内部段相比所述外部段距离所述中心较远， 在垂直于所述中心线的方向上，所述内部段的最大宽度大于所述外部段 的最大宽度。
如权利要求 24所述的工作头， 其特征在于： 所述外部段的横截面为矩 形， 所述内部段的横截面为圆形的一部分， 所述内部段的直径尺寸大于 所述外部段的横向宽度。
如权利要求 20所述的工作头， 其特征在于： 所述安装部具有外边缘， 所述安装部上设有自所述外边缘贯通至所述中心孔的缺口。
如权利要求 26所述的工作头， 其特征在于： 所述缺口相对所述中心孔 的中心呈 60夹角。
3
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