WO2020024762A1 - Dispositif de verrouillage de mode de martelage automatisé pour outil de martelage électrique - Google Patents

Dispositif de verrouillage de mode de martelage automatisé pour outil de martelage électrique Download PDF

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Publication number
WO2020024762A1
WO2020024762A1 PCT/CN2019/094661 CN2019094661W WO2020024762A1 WO 2020024762 A1 WO2020024762 A1 WO 2020024762A1 CN 2019094661 W CN2019094661 W CN 2019094661W WO 2020024762 A1 WO2020024762 A1 WO 2020024762A1
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WO
WIPO (PCT)
Prior art keywords
switch
gear
hammer
function
knob
Prior art date
Application number
PCT/CN2019/094661
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English (en)
Chinese (zh)
Inventor
楼其榜
Original Assignee
浙江信普工贸有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江信普工贸有限公司 filed Critical 浙江信普工贸有限公司
Publication of WO2020024762A1 publication Critical patent/WO2020024762A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • 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
    • 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

Definitions

  • the invention relates to a hammer pick electric tool, in particular to a hammer pick self-locking device that can ensure a hammer pick electric tool that can be locked during impact operation using a hammer pick.
  • Electric hammers and picks have three functions: hammer drill, single drill, and single hammer. They are widely used in construction, road laying and maintenance, home decoration, etc. for crushing, chiseling, digging, and grooving. They are widely used. Like it.
  • the structure includes a casing, a motor mounted on the casing, a transmission case, an upper cover fixed on the transmission case, a cylinder rotatably mounted on the transmission case, a connecting rod impact mechanism, a rotation mechanism, and a clutch.
  • the cylinder drives the drill on the drill clamping assembly to rotate, thereby achieving the drilling function.
  • the clutch is combined with the large bevel gear to achieve both rotation and impact functions; when the hammer gear is selected, the clutch is separated from the large bevel gear, and the drill bit only impacts and does not rotate, which can achieve a single hammer (or Called single chisel) function.
  • the electric hammer and electric picker have the following problems during use.
  • One is that the drill bit jams often occur during the hammer drill (rotation and impact) operation.
  • Electric hammers and electric picks are not allowed to have a self-locking switch when working in the hammer drill position, and can only be set with a jog control switch.
  • many manufacturers and people of insight carry out development and research, but so far no satisfactory products have come out.
  • the purpose of the present invention is to provide a simple and reasonable structure, convenient operation and use, which can ensure that the hammer drill gear position is not locked, and the hammer gear self-locking and point can be realized during the hammer gear position.
  • Hammer gear self-locking device of hammer pick electric tool which is not easy to be operated by manual operation and hammer gear.
  • the present invention creates a technical solution for solving the above technical problems, which includes a casing, a motor mounted on the casing, a transmission case, an upper cover fixed on the transmission case, and a cylinder rotatably installed on the transmission case. , Connecting rod impact mechanism, rotation mechanism, clutch mechanism, drill clamp assembly connected to the cylinder, rear handle, the transmission box is fixedly connected to the casing, a power normally open switch is installed on the rear handle, and the power normally open switch is connected to the motor.
  • the upper cover is provided with a switch for adjusting the function gear position
  • the lower end of the switch is provided with a high and low position difference
  • a switch box is installed at the rear of the transmission box
  • the switch box is installed with the lower end of the switch
  • Coordinated function changeover switch and hammer gear lock switch which is opposite to the holding position of the rear handle, the function changeover switch and hammer gear lock switch are connected in series with each other and connected in parallel with the power normally open switch; when the indicated position of the transfer knob corresponds to the hammer drill position
  • the function switch is matched with the lower position of the lower end of the switch, the function switch is in the off state; when the indicated position of the switch corresponds to the hammer position Function switching switch and the lower end surface of the switch knob and with high function switch is pressed, the function switch is in the ON state.
  • the height difference between the lower end surface of the switch knob is H, H is controlled within a range of 3-15 mm, the function switch is a normally open switch, and the hammer gear lock switch is a gear self-locking switch.
  • the connecting rod impact mechanism includes a hammer, an impact piston, a connecting rod piston, and an eccentric gear.
  • the pressing hammer, the impact piston, and the connecting rod piston are sequentially arranged in the cylinder, and the connecting rod piston passes through the crank connecting rod. It is connected with the eccentric gear.
  • the eccentric gear meshes with the output gear shaft of the motor.
  • the motor drives the eccentric gear to rotate through the output gear shaft.
  • the eccentric gear drives the connecting rod piston to reciprocate in the cylinder through the crank link.
  • the impact piston is driven to reciprocate to impact the impact hammer, and the impact hammer reciprocates to impact the drill on the drill holding component.
  • the rotating mechanism includes a large bevel gear that can be rotated relative to the cylinder, a small bevel gear that meshes with the large bevel gear, a driven gear coaxially disposed on the small bevel gear, and coaxially disposed on the The driving gear on the eccentric gear meshes with the driving gear.
  • the eccentric gear drives the small bevel gear through the meshing of the driving gear and the driven gear.
  • the small bevel gear drives the cylinder to rotate through the large bevel gear and the clutch mechanism.
  • the clutch mechanism includes a transmission sleeve fixed on a cylinder, a clutch, a shift fork, and a shift lever fixed on a conversion knob.
  • the clutch is axially movably disposed on the transmission sleeve.
  • the gear shift fork is connected between the clutch and the shift lever. When the shift knob is turned, the shift lever drives the clutch through the shift shift fork to couple or separate the transmission sleeve and the large bevel gear.
  • an elastic damping sleeve is fixedly connected between the upper and lower connection ends of the rear handle and the casing.
  • a switch box is installed at the rear of the transmission box.
  • the switch box can not only play a role of heat insulation, but also prevent the overheating of the transmission box from affecting the normal operation of the switch. In addition, it can play an insulation role to prevent leakage of the switch and improve safety performance.
  • the second is because the lower end of the transfer knob is provided with a high and low position difference.
  • the switch box is equipped with a function transfer switch that cooperates with the lower end of the transfer knob, a hammer lock switch that is directly opposite the holding position of the rear handle, and a function transfer switch and hammer.
  • the lock switches are connected in series with each other and connected in parallel with the normally open switch of the power supply.
  • the structure is simple and the operation is convenient.
  • the third is when the switch is rotated to make the indicated position correspond to the hammer drill position, the switch is gradually away from the function switch during the rotation process, and the transmission sleeve is combined with the large bevel gear through the clutch mechanism.
  • the function switch and the switch are combined, The lower end of the lower end cooperates, the function switch is in a reliable disconnected state, and the machine is in electric hammer mode.
  • the motor reciprocates the drill bit through the link impact mechanism, and the motor drives the drill bit to rotate through the rotating mechanism and the cylinder at the same time.
  • the machine can only jog and cannot self-lock.
  • the rotary knob when the rotary knob is rotated to make the indicated position correspond to the hammer position, the rotary knob gradually presses the function selector switch during the rotation process, and at the same time, the transmission sleeve is separated from the large bevel gear by the clutch mechanism, and the function selector switch and the selector knob The high end of the lower end is matched and the function switch is pressed. The function switch is in a reliable ON state.
  • the machine is in the electric pick mode.
  • the motor reciprocates the drill through the link impact mechanism.
  • the transmission sleeve is separated from the large bevel gear.
  • the motor cannot drive the drill to rotate.
  • FIG. 1 is a schematic diagram of a cooperation structure when a hammer drill gear is created according to the present invention.
  • FIG. 2 is a schematic diagram of a cooperation structure when a hammer gear is created according to the present invention.
  • FIG. 3 is a schematic diagram of a circuit principle cooperation structure created by the present invention.
  • a specific embodiment of a hammer gear self-locking device for a hammer pick power tool which includes a casing 2, a motor 1 mounted on the casing 2, and a transmission case 10.
  • the upper cover 24 fixed on the transmission case 10, the air cylinder 12 rotatably installed on the transmission case 10, the connecting rod impact mechanism, the rotation mechanism, the clutch mechanism, the drill clamp assembly connected to the cylinder 12, and the rear handle 21.
  • the transmission case 10 is fixedly connected to the casing 2.
  • the rear handle 21 is provided with a power normally open switch K3.
  • the power normally open switch K3 is electrically connected to the motor 1.
  • the upper cover 24 is provided with an adjustment function gear.
  • Switch knob 17 the lower end of the switch knob 17 is provided with a high and low position difference, a switch box 19 is installed at the rear of the transmission case 10, and a function switch K1, which matches the lower end of the switch knob 17, is installed on the switch box 19
  • Hammer gear lock switch K2 which is directly opposite to the holding position of the handle 21, and the function changeover switch K1 and hammer gear lock switch K2 are connected in series with each other and connected in parallel with the power normally open switch K3.
  • the function changeover switch K1 is in the disconnected state when the indicated position of the changeover knob 17 corresponds to the hammer position 23.
  • the function changeover switch K1 cooperates with the high end of the lower end of the changeover knob 17 and presses the function changeover switch K1 to change the function. Switch K1 is on.
  • the height difference between the lower end surface of the switch knob 17 is H, H is controlled within the range of 3-15mm, the function switch K1 is a normally open switch, and the hammer lock switch K2 is a gear self-locking switch.
  • the gear lock switch K2 is pressed, the switch is self-locked, and when it is pressed again, the switch is automatically popped off.
  • the connecting rod impact mechanism includes an impact hammer 9, an impact piston 11, a link piston 7, an eccentric gear 4, and the impact hammer 9, the impact piston 11, and the link piston 7 are sequentially arranged in the cylinder 12,
  • the rod piston 7 is connected to the eccentric gear 4 through a crank link.
  • the eccentric gear 4 meshes with the output gear shaft of the motor 1.
  • the motor 1 drives the eccentric gear 4 to rotate through the output gear shaft.
  • the eccentric gear 4 drives the link piston through the crank link. 7
  • the reciprocating motion in the cylinder 12 drives the impact piston 11 to reciprocate the impact hammer 9 through the change in the volume of the air chamber.
  • the impact hammer 9 reciprocates against the drill bit on the drill clamping assembly 8.
  • the rotating mechanism includes a large bevel gear 15 capable of rotating relative to the cylinder 12, a small bevel gear 6 meshing with the large bevel gear 15, a driven gear 5 coaxially disposed on the small bevel gear 6,
  • the driving gear 3 is coaxially arranged on the eccentric gear 4, and the driven gear 5 meshes with the driving gear 3.
  • the eccentric gear 4 meshes with the driven gear 5 through the driving gear 3 to drive the small bevel gear 6.
  • the small bevel gear 6 passes through the large The bevel gear 15 and the clutch mechanism drive the cylinder 12 to rotate.
  • the clutch mechanism includes a transmission sleeve 13 fixed on the cylinder 12, a clutch 14, a shift fork 16, and a shift lever 18 fixed on the conversion knob 17.
  • the clutch 14 is movably disposed in the axial direction.
  • the shift fork 16 is connected between the clutch 14 and the shift lever 18.
  • the shift lever 18 drives the clutch 14 through the shift fork 16 to connect or separate the transmission sleeve 13 and the large bevel gear 15. .
  • an elastic shock absorbing sleeve 20 is fixedly connected between the upper and lower connection ends of the rear handle 21 and the casing 2.
  • the working principle of the invention is as follows: When the hammer drilling operation is required, the switch knob 17 is rotated to align the indicated position with the hammer drill position 22. During the rotation of the switch knob 17, the switch knob 17 is gradually moved away from the function switch K1.
  • the function changeover switch K1 cooperates with the lower position of the lower end of the changeover knob 17, as shown in FIG. 1, the function changeover switch K1 is in a reliable disconnected state; the second is that the changeover knob 17 drives the clutch 14 through the lever 18 and the shift fork 16
  • the work causes the transmission sleeve 13 to be combined with the large bevel gear 15. At this time, the machine is in the electric hammer mode, which can rotate and impact.
  • the eccentric gear 4 drives the connecting rod piston 7 to reciprocate in the cylinder 12 through the crank connecting rod, and changes the volume of the air chamber to drive the impact piston 11 to reciprocate to impact the hammer 9, and the hammer 9 reciprocates to impact the bit clamping assembly 8
  • the eccentric gear 4 drives the driven gear 5 at the same time through the coaxially arranged driving gear 3, and the driven gear 5 drives the coaxially-set small bevel gear 6 to rotate, the small cone
  • the wheel 6 drives the large bevel gear 15 to rotate.
  • the large bevel gear 15 drives the cylinder 12 to rotate through the clutch 14 and the transmission sleeve 13.
  • the cylinder 12 is rotated by the drill on the drill clamping assembly 8 to achieve the electric hammer function.
  • the machine can only point Cannot be locked.
  • the changeover knob 17 When the electric pick-up operation is needed, turn the changeover knob 17 to align the indicated position with the hammer position 23. During the rotation of the changeover knob 17, the changeover knob 17 gradually presses the function changeover switch K1. When the function changeover switch K1 and The high position of the lower end of the transfer knob 17 is matched. As shown in FIG. 2, the function transfer switch K1 is in a reliable ON state. The second is that the transfer knob 17 drives the clutch 14 through the lever 18 and the shift fork 16 to make the transmission sleeve 13 and the large The bevel gear 15 is separated. At this time, the machine is in the electric pick-up mode, and the machine only impacts and does not rotate.
  • the impact hammer 9 reciprocates against the drill on the drill clamping assembly 8 Realize the impact; the eccentric gear 4 drives the driven gear 5 at the same time through the coaxially arranged driving gear 3, the driven gear 5 drives the coaxially set small bevel gear 6 to rotate, and the small bevel gear 6 drives the large cone
  • the gear 15 rotates, because the clutch 14 separates the transmission sleeve 13 from the large bevel gear 15, the large bevel gear 15 cannot drive the cylinder 12 through the clutch 14 and the transmission sleeve 13 to achieve the electric picker function.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)

Abstract

L'invention concerne un dispositif de verrouillage de mode de martelage automatisé pour un outil de martelage électrique. Un bouton de commutation (17) est prévu sur un couvercle supérieur (24). Une surface d'extrémité inférieure du bouton de commutation (17) a une différence de hauteur. Une boîte de commutation (19) est montée sur une portion arrière d'un boîtier de transmission (10). Un commutateur de fonction (K1) venant en prise avec la surface d'extrémité inférieure du bouton de commutation (17) et un commutateur de verrouillage de mode de martelage (K2) disposé à l'opposé d'une position de maintien d'une poignée arrière (21) sont montés sur la boîte de commutation (19). Le commutateur de fonction (K1) et le commutateur de verrouillage de mode de martelage (K2) sont connectés en série et les deux sont connectés en parallèle à un commutateur normalement ouvert de source d'alimentation (K3). Lorsque le bouton de commutation (17) correspond à un mode de forage (22), le commutateur de fonction (K1) est dans un état d'arrêt ; lorsque le bouton de commutation (17) correspond à un mode de martelage (23), le commutateur de fonction (K1) est dans un état de marche. Le dispositif présente les avantages d'une structure simple et raisonnable, d'un fonctionnement pratique et d'assurer que le mode de forage ne soit pas verrouillé ; de réaliser, en mode de martelage, un verrouillage automatisé du mode de martelage et une opération de frappe ; et de ne pas être susceptible de s'user dans le mode de martelage.
PCT/CN2019/094661 2018-07-31 2019-07-04 Dispositif de verrouillage de mode de martelage automatisé pour outil de martelage électrique WO2020024762A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810858899.9 2018-07-31
CN201810858899.9A CN108705490B (zh) 2018-07-31 2018-07-31 锤镐电动工具的锤档自锁装置

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WO2020024762A1 true WO2020024762A1 (fr) 2020-02-06

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WO (1) WO2020024762A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116587226A (zh) * 2023-07-14 2023-08-15 江苏东成工具科技有限公司 空气压缩装置及其电动工具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763733A (en) * 1985-10-26 1988-08-16 Hilti Aktiengesellschaft Hammer drill with rotational lock
CN2707439Y (zh) * 2004-05-25 2005-07-06 铁鎯电动工具有限公司 三功能轻型电锤
CN1709651A (zh) * 2004-06-16 2005-12-21 株式会社牧田 电动冲击工具
JP2007152481A (ja) * 2005-12-02 2007-06-21 Makita Corp 作業工具
CN101524767A (zh) * 2008-03-05 2009-09-09 株式会社牧田 电锤

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1136446A (fr) * 1979-06-18 1982-11-30 Norman J. Ince Marteau piqueur
JP3609626B2 (ja) * 1998-09-16 2005-01-12 株式会社マキタ ハンマードリル
DE10027392B4 (de) * 2000-06-02 2005-08-18 Metabowerke Gmbh Schlagbohrmaschine
JP4312536B2 (ja) * 2003-08-07 2009-08-12 株式会社マキタ 電動工具
DE102007000470A1 (de) * 2007-08-29 2009-03-05 Hilti Aktiengesellschaft Vibrierende Handwerkzeugmaschine mit einem Arretierschalter des Motorschalters
CN202011006U (zh) * 2011-04-08 2011-10-19 浙江博大实业有限公司 手提式双功能电锤
US11052525B2 (en) * 2016-03-03 2021-07-06 Makita Corporation Hammer drill
CN208681504U (zh) * 2018-07-31 2019-04-02 浙江信普工贸有限公司 锤镐电动工具的锤档自锁装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4763733A (en) * 1985-10-26 1988-08-16 Hilti Aktiengesellschaft Hammer drill with rotational lock
CN2707439Y (zh) * 2004-05-25 2005-07-06 铁鎯电动工具有限公司 三功能轻型电锤
CN1709651A (zh) * 2004-06-16 2005-12-21 株式会社牧田 电动冲击工具
JP2007152481A (ja) * 2005-12-02 2007-06-21 Makita Corp 作業工具
CN101524767A (zh) * 2008-03-05 2009-09-09 株式会社牧田 电锤

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Publication number Publication date
CN108705490B (zh) 2023-12-29
CN108705490A (zh) 2018-10-26

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