EP1925403A1 - Drucklufthandwerkzeug - Google Patents

Drucklufthandwerkzeug Download PDF

Info

Publication number
EP1925403A1
EP1925403A1 EP06124800A EP06124800A EP1925403A1 EP 1925403 A1 EP1925403 A1 EP 1925403A1 EP 06124800 A EP06124800 A EP 06124800A EP 06124800 A EP06124800 A EP 06124800A EP 1925403 A1 EP1925403 A1 EP 1925403A1
Authority
EP
European Patent Office
Prior art keywords
inlet
cylinder
control knob
rotor
assembly
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.)
Granted
Application number
EP06124800A
Other languages
English (en)
French (fr)
Other versions
EP1925403B1 (de
Inventor
Chi-Chen 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.)
Year Congratulate Industrial Co Ltd
Year Congratulate Ind Co Ltd
Original Assignee
Year Congratulate Industrial Co Ltd
Year Congratulate Ind 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 Year Congratulate Industrial Co Ltd, Year Congratulate Ind Co Ltd filed Critical Year Congratulate Industrial Co Ltd
Priority to AT06124800T priority Critical patent/ATE452004T1/de
Priority to EP06124800A priority patent/EP1925403B1/de
Priority to DE602006011184T priority patent/DE602006011184D1/de
Publication of EP1925403A1 publication Critical patent/EP1925403A1/de
Application granted granted Critical
Publication of EP1925403B1 publication Critical patent/EP1925403B1/de
Not-in-force 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
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • the present invention relates to a pneumatic hand tool, and more particularly to a pneumatic hand tool which is compact is size and low cost.
  • the current available pneumatic hand tool is shown in Fig. 9 , which includes a body (90), a cylinder (91), a rotor (92), a bearing (93), a sealing cap (94) and a control knob (95).
  • the conventional pneumatic hand tool as shown is characterized in that the sealing cap (94) is firmly secured to a rear side of the body (90) so as to sealingly encase and position the cylinder (91), the rotor (92) and the bearing (93) inside the body (90).
  • the sealing cap (94) is provided with an inlet passage and a pair of mutually corresponding air conducting passages incorporative with the control knob (95) to control and adjust the air path and air volume entering the cylinder (91). Accordingly, the rotation direction and rotational torque of the pneumatic hand tool is controlled.
  • the separation of the control knob (95) and the cylinder (91) limits that the body (90) has to be made of a metal material and the airtight capability has to be enhanced so as to accomplish safety requirements. Enhancing safety abilities of this conventional pneumatic hand tool increases the manufacture cost. Also, the metal material limitation for the production of the body (90) results in that the overall weight of the pneumatic hand tool is heavy. As a result of heavy weight of the hand tool, it is not easy for the user to operate the hand tool.
  • the present invention tends to provide a novel pneumatic hand tool to mitigate the aforementioned problems.
  • the primary objective of the present invention is to provide a compact pneumatic hand tool composed of a body, a cylinder assembly, a sealing pad, a striking assembly, a front cap, a control knob, an exhaust cap and threaded bolts.
  • a first bearing is mounted around a rear end of a central axle of the striking assembly and an outer rim of the first bearing is securely received in a central hole of a front cover of the cylinder assembly.
  • a second bearing is mounted on a second shaft of the rotor in the cylinder assembly.
  • the control knob is mounted on the cylinder assembly.
  • a front end of the central shaft of the striking assembly extends out of a front cap and the body is connected to the front cap via threaded bolts so that the striking assembly and the cylinder assembly are sealingly enclosed between the front cap and the body to accomplish the compact and light-weight requirements.
  • the pneumatic hand tool in accordance with the present invention includes a hollow body (10), a cylinder assembly (20) received inside the body (10), a sealing pad (30), a striking assembly (40), a front cap (50) sealingly connected to the body (10) with the sealing pad (30) sandwiched therebetween, a control knob (60) rotatably mounted on a side face of the body (10), an exhaust cap (70) connected to a bottom face of a handle (14) of the body (10) and threaded bolts (80) extended through the body (10) to securely connect the front cap (50) to the body (10).
  • the body (10) has a front opening, a space (11) defined in a front portion thereof to communicate with the front opening, a closed rear end provided with a control knob mounting portion (12) and threaded bolt extending portion (13) and a handle (14) extending downward from a bottom face of the body (10) and having a connection portion (140) defined in a bottom face of the handle (14).
  • the cylinder assembly (20) is composed of a cylinder (21), a rotor (22), a front cover (23), a first bearing (24), a second bearing (25), a resilient control assembly (26) and a airtight seal (27).
  • the cylinder (21) has a first leakproof portion (21A), a second leakproof portion (21B), a receiving recess (21C) and a rotor receiving chamber (21D).
  • the first leakproof portion (21A) and the second leakproof portion (21B) respectively have the airtight seal (27).
  • the receiving recess (21C) is defined to receive therein the resilient control assembly (26) and the rotor receiving chamber (21 D) is defined to receive therein the rotor (22).
  • the rotor (22) has a front shaft (220) provided with a first coupling portion (221), a rear shaft (222) extending from a rear side of the rotor (22), multiple slits (223) defined in an outer periphery thereof to respectively receive therein a blade (224).
  • the rear shaft (222) extends through the cylinder (21) to have the second bearing (25) mounted therearound and the front shaft (220) extends through the front cover (23) to have the first bearing (24) mounted therearound with the front cover (23) mounted on the front portion of the cylinder (21).
  • the cylinder (21), which is received in the space (11) of the body (10), has a rear inlet opening (211), a first inlet (212), a second inlet (213), a first exhaust opening (214), a second exhaust opening (215), a first inlet passage (216), a second inlet passage (217), a bottom inlet opening (218) and an inlet (219), wherein the first inlet (212) and the second inlet (213) respectively communicate with the first inlet passage (216) and the second inlet passage (217), the bottom inlet opening (218) communicates with the rear inlet opening (211) via the inlet (219).
  • the sealing pad (30) is mounted between the front cap (50) and the body (10) to secure the engagement between the front cap (50) and the body (10) in a airtight manner.
  • the striking assembly (40) has a central axle (41) extending from a first side thereof and a second coupling portion (42) extending a second side thereof opposite to the first side to couple with the first coupling portion (221) of the front shaft (220).
  • the front cap (50) has a through hole (51) defined in a front side thereof to allow extension of the central axle (41) therethrough and apertures (52) defined around a face thereof to allow extension of the threaded bolts (80) after extending through the threaded bolt extending portion (13) of the body (10) to secure the engagement between the front cap (50) and the body (10).
  • the control knob (60) is mounted at the control knob mounting portion (12) of the body (10) and has a stop recess (61) corresponding to the receiving recess (2 1 C) of the cylinder (21) to sandwich the resilient control assembly (26) therebetween, an air inlet (62), a first air exhaust hole (63), a second air exhaust hole (64) and a leak prevention portion (65) with a leak seal (650) such that after the control knob (60) is mounted at the control knob mounting portion (12), the leak seal (650) is able to prevent any leakage between the control knob (60) and the body (10).
  • the exhaust cap (70) has a coupling portion (71) corresponding to and engaged with the connection portion (140) of the handle (14).
  • Figs. 2-8 are exploded perspective view, sectional view and enlarged perspective views of the components of the present invention
  • the rear end of the central axle (41) of the striking assembly (40) is mounted with the first bearing (24).
  • the outer rim of the first bearing (24) is fitted into the front cover (23).
  • the front shaft (220) of the rotor (22) after extending through the first bearing (24), is connected to the second coupling portion (42) of the striking portion (40) via the first coupling portion (221) thereof, such that rotation of the rotor (22) is able to drive the striking portion (40) to rotate simultaneously.
  • the blades (224) are securely received in the slits (223) of the rotor (22).
  • the front portion of the cylinder assembly (20) is securely connected to the front cover (23) to form a closed space to receive therein the rotor (22) as well as the blades (224).
  • the rear shaft (222) of the rotor (22) is extended through the cylinder (21) to have the second bearing (25) mounted therearound.
  • the control knob (60) is mounted at the rear portion of the cylinder (21) and the central axle (41) of the striking assembly (40) is extended through the through hole (51) of the front cap (50).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Manipulator (AREA)
  • Gripping On Spindles (AREA)
EP06124800A 2006-11-27 2006-11-27 Drucklufthandwerkzeug Not-in-force EP1925403B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT06124800T ATE452004T1 (de) 2006-11-27 2006-11-27 Drucklufthandwerkzeug
EP06124800A EP1925403B1 (de) 2006-11-27 2006-11-27 Drucklufthandwerkzeug
DE602006011184T DE602006011184D1 (de) 2006-11-27 2006-11-27 Drucklufthandwerkzeug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06124800A EP1925403B1 (de) 2006-11-27 2006-11-27 Drucklufthandwerkzeug

Publications (2)

Publication Number Publication Date
EP1925403A1 true EP1925403A1 (de) 2008-05-28
EP1925403B1 EP1925403B1 (de) 2009-12-16

Family

ID=37951477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06124800A Not-in-force EP1925403B1 (de) 2006-11-27 2006-11-27 Drucklufthandwerkzeug

Country Status (3)

Country Link
EP (1) EP1925403B1 (de)
AT (1) ATE452004T1 (de)
DE (1) DE602006011184D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI418450B (de) * 2012-01-16 2013-12-11

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6044917A (en) * 1996-03-18 2000-04-04 Brunhoelzl; George Pneumatic tool with side exhaust
US20030136570A1 (en) * 2000-09-08 2003-07-24 Osamu Izumisawa Pneumatic rotary tool
US20030230423A1 (en) * 2002-06-14 2003-12-18 S.P. Air Kabusiki Kaisha Pneumatic rotary tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6044917A (en) * 1996-03-18 2000-04-04 Brunhoelzl; George Pneumatic tool with side exhaust
US20030136570A1 (en) * 2000-09-08 2003-07-24 Osamu Izumisawa Pneumatic rotary tool
US20030230423A1 (en) * 2002-06-14 2003-12-18 S.P. Air Kabusiki Kaisha Pneumatic rotary tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI418450B (de) * 2012-01-16 2013-12-11

Also Published As

Publication number Publication date
EP1925403B1 (de) 2009-12-16
ATE452004T1 (de) 2010-01-15
DE602006011184D1 (de) 2010-01-28

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