EP2055440B1 - Multi-function double-speed rotary hammer - Google Patents

Multi-function double-speed rotary hammer Download PDF

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Publication number
EP2055440B1
EP2055440B1 EP20080167598 EP08167598A EP2055440B1 EP 2055440 B1 EP2055440 B1 EP 2055440B1 EP 20080167598 EP20080167598 EP 20080167598 EP 08167598 A EP08167598 A EP 08167598A EP 2055440 B1 EP2055440 B1 EP 2055440B1
Authority
EP
European Patent Office
Prior art keywords
speed
function
gear
low
getting
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.)
Expired - Fee Related
Application number
EP20080167598
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2055440A1 (en
Inventor
Qingsheng Yang
Songnian Chen
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.)
Changzhou Saidi Electric Manufacturing Co Ltd
Original Assignee
Changzhou Saidi Electric Manufacturing 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 Changzhou Saidi Electric Manufacturing Co Ltd filed Critical Changzhou Saidi Electric Manufacturing Co Ltd
Publication of EP2055440A1 publication Critical patent/EP2055440A1/en
Application granted granted Critical
Publication of EP2055440B1 publication Critical patent/EP2055440B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/061—Swash-plate actuated impulse-driving mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0015—Tools having a percussion-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0038—Tools having a rotation-only mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0076—Angular position of the chisel modifiable by hand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/045—Cams used in percussive tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/275—Tools having at least two similar components

Definitions

  • This patent relates to a rotary hammer which is one of kinds of power tools, it uses only one function knob to realize 5 functions, such as
  • Function a (only chiseling) is adapted for working at making wiring slot on wall which is made of concrete or brick, and removing tilt on the wall.
  • Function b (adjusting the working angle of flat chisel): sometimes, the end-user changes the working angle of flat chisel when working, they should set the function knob at this position, and select the proper angle, then put the function knob to the function A to work continuously.
  • Function d (only drilling with low speed;): mainly used for drilling holes in steel or wood, when the diameter of hole is less than 10mm, but when diameter of hole is bigger than 10 mm, the drilling speed becomes lower.
  • WO 2008/000545 A1 and WO 2008/080658 A1 which fall within the terms of Article 54(3) EPC, disclose a multi-function double speed rotary hammer of this kind which further realizes the function of only drilling with high speed, whereby this function can be selected with the same knob as the other function.
  • DE 93 07 523 U1 discloses a multi-function double speed rotary hammer having the 5 functions of only chiseling, adjusting the working angle of flat chisel, drill & chisel, only drilling with low speed and only drilling with high speed, but all 5 functions are not achieved by using only one knob. There is a function knob and a locking pin for switching between the functions.
  • this Multi-function Double-speed Rotary hammer has been added the function of only drilling with high speed (function E), it not only has a tight structure, it also can be operated simply, because it has only one knob which can conveniently achieve functions switch.
  • this patent is related to invent one multi-function double-speed rotary hammer with single function knob to realize 5 functions such as
  • present invention is characterized that the tool use only one function to realize 5 functions above, especially it has the function e( only drilling with high speed).
  • the present invention shows how to realize the 5 functions in details:
  • the tool mainly includes front parts and rear part, the front part is gear system, the rear part is motor system; the front part includes gear housing 15, base 16, transmission shaft assembly 17, Impact shaft assembly 6, shaft lock assembly 44, the character is below:
  • Transmission shaft assembly 17 mainly includes transmission shaft 24, wobble bearing 19, and clutch 21 which can gear or ungear with transmission shaft 24, and spring 20 for clutch system.
  • Impact shaft assembly 6 mainly includes impact shaft 7, lock ring 8, low-speed gear 12 which in installed in the impact shaft 7 and may drive impact shaft 7, high-speed gear 9, back-forward spring 11, cylinder 14.
  • the tool also includes gear assembly 26 which is fixed on transmission shaft 24 and can move along with transmission shaft 24; gear assembly 26 includes a low-speed pinion 25 which gears or ungears with low-speed gear 12 in transmission shaft assembly 17 and a high-speed pinion 29 which gears with a high-speed gear 9 in transmission shaft assembly 17.
  • the tool also includes one function-adjusting board 34 for getting low-speed and one function-adjusting board 35 for getting high-speed, spring 41 is installed in the function-adjusting board 35 for getting high-speed; function-adjusting board 34 for getting low-speed is connected with side pin 37 and 38 which can move low-speed gear 12 and clutch 21 respectively along transmission shaft 24.
  • the function-adjusting board 35 for getting high-speed connected with side pin 36 which may move gear assembly 26 along the direction of shaft.
  • the tool also has a inner function knob 32 in the base 16, outside function knob 33 is fixed with inner function knob 32 which is connected with one function-adjusting board 34 for getting low-speed which can move along transmission shaft 24 for getting low speed and a function-adjusting board 35 for getting high-speed which is fixed.
  • gear assembly 26 is fixed on transmission shaft 24 by a flat key 28, it only can move along with transmission shaft 24; at the two ends of gear assembly 26, it has low-speed pinion 25 and high-speed pinion 29; the slot 27 is in the middle area of gear assembly 26.
  • Low-speed gear 12 is fixed in the impact shaft 7 by a flat key 13, it only can axially move along with impact shaft 7.
  • High-speed gear 9 is installed on the impact shaft 7 by key 10, it can only move along with impact shaft 7 axially.
  • the lock ring 8 is used for stopping low-speed gear 12 and high-speed gear 9 to move axially; back-forward spring 11 is installed between low-speed gear 12 and high-speed gear 9 on the impact shaft 7.
  • the function-adjusting board 34 for getting low-speed is connected with side pin 37 and 38, it has one hole 50, there is teeth 49 at one side parallel with moving direction;
  • the function-adjusting board 35 for getting high-speed is connected with side pin 36 which is fixed in the slot 27 of the sliding gear assembly 26, there is a hole 52 on the function-adjusting board 35 for getting high-speed, it has one teeth 51 in at least one side of hole 52 parallel with moving direction.
  • Side pin 37 and 38 are perpendicular with function-adjusting board 34 for getting low-speed
  • side pin 37 is perpendicular with the side pin 38
  • side pin 36 is perpendicular with function-adjusting board 35 for getting high-speed.
  • the spring 41 is installed on function-adjusting board 35 for getting high-speed; the bended bar 40 is installed in the slot 39 of the base 16.
  • the cylinder surface 48 has several teeth 46 which can gear or ungear with teeth 51 in function-adjusting board 35 for getting high-speed.
  • back-forward spring 11 is used for the restoration back-forward spring 11 installed on the big gear is press spring, spring 20 installed on the clutch is press spring too, and the spring 41 installed on board is wiggly spring.
  • Function-adjusting board 34 for getting low-speed is installed in the slot 30 which is in the base 16 and parallel with transmission shaft 24 axially, and can slide along transmission shaft 24 axially in the groove
  • function-adjusting board 35 for getting high-speed is installed in the slot 31 which is in the base 16 and parallel with transmission shaft 24 axially, it can slide along transmission shaft 24 axially in the groove.
  • This tool can get 5-function mode by controlling the function-adjusting board 34 and 35 with outside function knob 33.
  • function-adjusting board 34 for getting low-speed causes that:
  • function-adjusting board 34 for getting low-speed helps low-speed gear 12 to ungear with low-speed pinion 25 which is included in gear assembly 26. While Low-speed gear 12 gears with shaft lock assembly 44, it achieves the function of only chiseling;
  • shaft lock assembly 44 When rotating the outside function knob 33 to position 2 in FIG 1 , shaft lock assembly 44 ungears with low-speed gear 12, then it achieves the function of adjusting the working angle of flat chisel;
  • function-adjusting board 34 for getting low-speed helps low-speed gear 12 to gear with low-speed pinion 25 which is included in gear assembly 26, it achieves the function of drilling & chiseling;
  • function-adjusting board 34 for getting low-speed helps clutch 21 to ungear with transmission shaft 24, it achieves the function of only drilling with low-speed;
  • function-adjusting board 34 for getting low-speed doesn't work, under the pushing of inner function knob 32, function-adjusting board 35 for getting high-speed helps high-speed gear 9 to gear with high-speed pinion 29 which is included in gear assembly 26, it achieves the function of only drilling with high-speed.
  • the invention relates to one multi-function double-speed rotary hammer which includes front part and rear part, the front part is gear system, the rear part is motor system.
  • the front part includes gear housing 15 and it's inside components, such as base 16, transmission shaft assembly 17, Impact shaft assembly 6, low-speed gear 12, high-speed gear 9, back-forward spring 11, function-adjusting board 34 for getting low-speed, function-adjusting board 35 for getting high-speed, spring 41, gear assembly 26 (including low-speed pinion 25 and high-speed pinion 29) and shaft lock assembly 44.
  • gear housing 15 and it's inside components, such as base 16, transmission shaft assembly 17, Impact shaft assembly 6, low-speed gear 12, high-speed gear 9, back-forward spring 11, function-adjusting board 34 for getting low-speed, function-adjusting board 35 for getting high-speed, spring 41, gear assembly 26 (including low-speed pinion 25 and high-speed pinion 29) and shaft lock assembly 44.
  • Transmission shaft assembly 17 mainly includes transmission shaft 24, pinion 18 fixed on transmission shaft 24, wobble bearing 19, clutch 21 which can gear or ungear with transmission shaft 24, and spring 20 for clutch system; the pinion in armature will gear with the pinion 18 and drives transmission shaft 24.
  • clutch 21 There is inner spline key in clutch 21; the spline key is used to gear with wobble bearing 19.
  • Gear assembly 26 is installed with transmission shaft 24 by a flat key 28, it only can move along transmission shaft 24 axially.
  • Gear assembly 26 has low-speed pinion 25 and high-speed pinion 29.
  • spline key 22 is used to make clutch 21 to gear with transmission shaft 24.
  • the clutch is fixed to transmission shaft 24 with one Lock ring 23.
  • Spring 20 is used for reversing clutch 21 to gear with spline key 22 of transmission shaft 24.
  • Impact shaft assembly 6 mainly includes impact shaft 7, lock ring 8, back-forward spring 11 for high-speed gear 9, low-speed gear 12 which in installed in the impact shaft 7 by key 13 and may drive impact shaft 7, high-speed gear 9, cylinder 14.
  • High-speed 9 is installed in impact shaft 7 by key 10, and it only can move along with the impact shaft 7 axially.
  • Lock ring 8 is used to position low-speed gear 12 and high-speed gear 9.
  • Low-speed gear 12 and high-speed gear 9 are at the two ends of back-forward spring 11.
  • Function-adjusting board 35 for getting high-speed is positioned in the slot 31 parallel with the axis of transmission shaft 24. and it can move back and forward along the slot 31 in base 16.
  • Function-adjusting board 34 for getting low-speed is positioned the slot 30 parallel with the axis of transmission shaft 24, it also can move back and forward along the slot 30 in base 16.
  • function-adjusting board 34 for getting low-speed has side pin 37 and side pin 38.
  • Side pin 37 is used to move low-speed gear 12
  • side pin 38 is used to move clutch 21.
  • There is a hole 52 in function-adjusting board 35 for getting high-speed the middle of the side parallel with its moving direction in the hole 52 has teeth 51.
  • the spring 41 is installed in the function-adjusting board 35 for getting high-speed.
  • the bended bar 40 for spring 41 is installed in the slot 39 of base 16.
  • the spring 41 can move the function-adjusting board 35 for getting high-speed and have teeth 51 in function-adjusting board 35 for getting high-speed and teeth 45 in inner function knob 32 to gear with each other.
  • Inner function knob 32 is positioned in one hole of base 16, it is characterized that there are cylinder surface 47 and 48 in inner function knob 32. There are several teeth 45 in cylinder surface 47 and several teeth 46 in cylinder surface 48. Teeth 45 can gear or ungear with teeth 49 in function-adjusting board 34 for getting low-speed. Teeth 46 can gear or ungear with teeth 51 in function-adjusting board 35 for getting high speed.
  • Outside function knob 33 is connected with inner function knob 32. When outside function knob 33 is rotated, the function-adjusting board 34 and 35 can move axially along with transmission shaft 24 or keep still (see FIG 15, FIG 16, FIG 17 ).
  • Position 1 only chiseling (see FIG 2, FIG 4)
  • Position 2 adjusting the working angle of flat chisel (see FIG 5, FIG 6)
  • Function-adjusting board 34 for getting low-speed is pushed forward by force from teeth 45 of inner function knob 32, low-speed gear 12 gears with low-speed pinion 25 under the help of back-forward spring 11, the other components don't move or change their position. Now it achieves the function of Drilling & chiseling. (see FIG 7, 8 )

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
EP20080167598 2007-10-30 2008-10-27 Multi-function double-speed rotary hammer Expired - Fee Related EP2055440B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2007101344976A CN100513090C (zh) 2007-10-30 2007-10-30 双速多功能电锤

Publications (2)

Publication Number Publication Date
EP2055440A1 EP2055440A1 (en) 2009-05-06
EP2055440B1 true EP2055440B1 (en) 2012-06-27

Family

ID=39305509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080167598 Expired - Fee Related EP2055440B1 (en) 2007-10-30 2008-10-27 Multi-function double-speed rotary hammer

Country Status (2)

Country Link
EP (1) EP2055440B1 (zh)
CN (1) CN100513090C (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017002517A1 (ja) * 2015-06-30 2017-01-05 日立工機株式会社 打撃工具

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201618874U (zh) * 2010-01-21 2010-11-03 浙江海王电器有限公司 电动工具的高低双速旋转与冲击结构
CN101758486B (zh) * 2010-01-21 2011-09-28 浙江海王电器有限公司 轻型单钮多功能电锤
CN102649266B (zh) * 2012-04-16 2015-04-08 制尚电器(浙江)有限公司 一种多功能双速电锤
DE102012212417B4 (de) * 2012-07-16 2017-06-08 Robert Bosch Gmbh Schalteinheit
CN102765080B (zh) * 2012-07-18 2014-12-24 宁波汉浦工具有限公司 双速电锤
CN203471741U (zh) * 2013-09-13 2014-03-12 王国雄 电钻转接头
CN104552183B (zh) * 2013-10-10 2017-06-27 苏州宝时得电动工具有限公司 手持式电动工具
DE102016224862A1 (de) * 2016-12-13 2018-06-14 Robert Bosch Gmbh Bohr- und/oder Meißelhammer
CN106826696A (zh) * 2017-02-28 2017-06-13 东莞产权交易中心 一种改进的无尘冲击钻
CN109262549B (zh) * 2017-07-17 2021-04-06 博世电动工具（中国）有限公司 电动工具
WO2020110539A1 (ja) * 2018-11-29 2020-06-04 工機ホールディングス株式会社 打撃作業機

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Publication number Priority date Publication date Assignee Title
DE9307523U1 (de) * 1993-05-18 1994-09-29 Bosch Gmbh Robert Elektrowerkzeug, insbesondere Schlagbohrmaschine oder Bohrhammer
DE102004018084B3 (de) * 2004-04-08 2005-11-17 Hilti Ag Hammerbohrgerät
DE102006029363A1 (de) 2006-06-27 2008-01-03 Robert Bosch Gmbh Elektrohandwerkzeug
DE102006061624A1 (de) 2006-12-27 2008-07-03 Robert Bosch Gmbh Handwerkzeugmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017002517A1 (ja) * 2015-06-30 2017-01-05 日立工機株式会社 打撃工具

Also Published As

Publication number Publication date
EP2055440A1 (en) 2009-05-06
CN101157214A (zh) 2008-04-09
CN100513090C (zh) 2009-07-15

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