US3700015A - Vibration absorbing device for portable machines - Google Patents

Vibration absorbing device for portable machines Download PDF

Info

Publication number
US3700015A
US3700015A US161729A US3700015DA US3700015A US 3700015 A US3700015 A US 3700015A US 161729 A US161729 A US 161729A US 3700015D A US3700015D A US 3700015DA US 3700015 A US3700015 A US 3700015A
Authority
US
United States
Prior art keywords
main body
handle
machine
supporting member
secured
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 - Lifetime
Application number
US161729A
Other languages
English (en)
Inventor
Torao Kobayashi
Masatoshi Sato
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.)
KYORITSU NOKI CO Ltd
Original Assignee
KYORITSU NOKI 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 KYORITSU NOKI CO Ltd filed Critical KYORITSU NOKI CO Ltd
Application granted granted Critical
Publication of US3700015A publication Critical patent/US3700015A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0033—Devices for attenuation of vibrations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/95—Machine frame

Definitions

  • ABSTRACT A vibration absorbing device for portable machines of the type accommodating a vibration generating source therein and having a front handle and a rear handle, wherein said front and rear handles are secured to the main body of the machine independently of each other and through resilient buffer members respectively, while the main body of the machine is provided with seats for the respective resilient buffer members on the rear and bottom walls thereof over regions extending transversely of the main body.
  • the front handle extends transversely of the main body to surround one side surface of said main body, while the rear handle extends perpendicularly of said front handle.
  • Each of the resilient buffer member is so designed so to provide sufficiently rigid connection between the respective handle and the main body.
  • This invention relates to a vibration absorbing device for portable machines, such as a chain saw, having a source of vibration accommodated therein, and more specifically to a vibration absorbing structure of said machines in which a machine operating handle is connected to the main body of the machine in a manner to absorb vibration.
  • the object of the present invention is to improve the securement of a handle to a portable machine of the type described and to provide a vibration absorbing device for said portable machine which minimizes the vibration transmitting to the operators body and thereby enables the operator to handle and operate the machine conveniently, safely and efficiently.
  • a vibration absorbing device for portable machines of the type accommodating a vibration generating source therein and having a front handle and a rear handle
  • said front handle has a substantially U-shape and is provided at the front portion of the main body of said machine extending from above the upper surface of said main body to the front end of the bottom surface of said main body in a manner to surround one side sur face of said main body with a predetermined space there-between
  • the lower end of said front handle being integrally fastly connected to the front end of a rigid bifurcate supporting member extending longitudinally along the bottom surface of said main body from the front end to the rear end thereof
  • said front handle being secured to the main body of the machine at three points, i.e., at the upper end of said handle, the lower end of said handle or the front end of said bifurcate supporting member and the rear end of said bifurcate supporting member, through.
  • said main body of the machine being provided on the bottom surface thereof with one or a plurality of seats for the respective buffer members at the lower end of said front handle or the front end of said bifurcate supporting member over a substantially rectangular region of a predetermined length extending transversely of said main body; and said rear handle has its upper front end secured to the upper portion of a rear wall of said main body and its lower rear end secured to a rear handle supporting member extending rearwardly from the lower portion of the rear wall of said main body respectively through resilient buffer members, said main body being provided on the upper portion of the rear wall thereof with one or a plurality of seats for the respective resilient buffer members over a substantially rectangular region of a predetermined length extending transversely of said main body; and said front and rear handles being thus secured to the'main body of the machine independently of each other.
  • FIG. 1 is aside view showing an'embodiment of the vibration absorbing device according to the invention, as applied to a chain saw, and illustrating the structure of each handle connecting portion, with buffer members shown in cross-section;
  • FIG. 2 is a front view illustrating the manner of connecting the front handle of the'chain saw shown in FIG.
  • FIGS. 3a and 3b are a top plan view and a side view respectively of the rear handle of the chain saw shown in FIG. 1;
  • FIGS. 4, 5, 6a and 6b are views, corresponding to FIGS. 1, 2, 3a and 3b respectively, showing another embodiment of the vibration absorbing device of the invention.
  • FIGS. 1 and 2 show an embodiment of the vibration absorbing device of the invention as applied to a chain saw which is used for cutting standing timbers.
  • main body 1 of the machine hereinafter referred to simply as main body
  • the chain saw blade 4 is driven on an endless path by the driving shaft of the motor along the edge of a guide plate 5 projecting to the right, as viewed in FIG. 1, from the main body 1, to cut the standing timber.
  • Reference numeral 3 designates the axis of the driving shaft.
  • the main body 1 is provided-with a front handle 6 and a rear handle 7.
  • the operator operates the chain saw while securely holding the chain saw by these handles.
  • the handles 6, 7 are independently connected to the main body I through a buffer member to be described later.
  • the front handle 6 has a U-shape extending from the front upper side to the bottom of the main body 1 in a manner to surround more than half of the entire periphery of said main body.
  • the lower length of the handle 6 extending along the bottom of the main body 1 is fastly grasped by the front end of a bifurcate supporting member 8 in perpendicular relation thereto, said bifurcate supporting member 8 extending from the front portion to the rear portion of the main body along the center line of said main body.
  • This bifurcate supporting member 8 has a rigidity sufficient to prevent, in cooperation with the front handle 6, an oscillatory movement of the main body 1 relative to said handle in a plane perpendicular to said handle during operation of the machine.
  • the upper end of the front handle 6 is connected with a bracket 9 through an upper buffer member 10, which bracket is rigidly secured to the main body 1 by means of bolts 11 and extends upwards from said main body, whereby a space sufficient to the insertion of a hand is provided between the main body I and the handle.
  • the lower end of the front handle 6 is connected to the main body 1 through a lower buffer member 14 within a lower seat 13 which is provided in the bottom wall of said main body 1 and extends in a substantially rectangular shape towards the axis 3 of the driving shaft.
  • the rear end of the bifurcate supporting member 8 is secured to the rear wall of the main body 1 through a cylindrical buffer member 20 at a point near the root of a rear handle supporting member 24 which is integral with the rear wall of the main body and extends rearwardly therefrom.
  • the upper buffer member for the front handle consists of a pair of halves which are made of a resilient material, such as vibration insulating rubber, and integrally coupled together by rigid outer and inner annular plate members 10a, 10b.
  • the annular plate member 10a is fitted in an annular recess formed in the bracket 9, while the reduced diameter end portion of the front handle 6 is inserted into the annular plate member 10b and fastly secured to the bracket 9 by means of a bolt 12.
  • Reference numeral 10c designates an annular space which is formed when the halves of the upper buffer member 10 are coupled together.
  • the lower buffer member 14, similarto the upper buffer member 10, comprises a resilient body such as vibration insulating rubber, and rigid plate members 14a, 14b attached to the upper and lower sides of said resilient body, and has a sectorial shape in transverse cross-section as shown in FIG. 1 and a substantially rectangular shape in longitudinal cross-section as shown in FIG. 2, extending transversely of the main body 1.
  • the buffer member 14 is fastly secured to the lower end of the front handle 6 by means of bolts 16 which are respectively screw-threaded into nuts provided on the inner surface of the lower plate member 14b and embedded in the resilient body.
  • the upper plate member 14a is secured at its longitudinal ends to a casing of the main body 1 by means of bolts 17.
  • Reference numeral 140 designates a recess formed in the resilient body for receiving a bolt 18 by which a sectional housing is assembled.
  • the buffer member 20 comprises a cylindrical resilient body made of such a material as rubber, plate members 21a and 21b attached integrally to the upper and lower surfaces of said cylindrical resilient body respectively, and externally threaded studs 22a and 22b extending integrally outwardly from the outer surfaces of said plate members 21a and 21b respectively.
  • the rear wall of the main body 1 and the rear end of the bifurcate supporting member 8 are secured with each other through the buffer member 20 by tightly engaging nuts 23a, 23b on the threaded studs 22a, 22b respectively.
  • the front handle 6 Since the upper end of the front handle 6 is supported by the bracket 9 through the buffer member 10 of the construction described above on the upper side of the main body 1, and the lower end thereof is supported by the supporting area, having a substantial width, at the lower front end of the main body 1, the front handle 6 is supported substantially in the fashion of three-point support. It is also supported at the lower portion of the rear wall of the main body 1 through the buffer member and the bifurcate supporting member 8 to which said handle is rigidly connected by a bolt 19. Therefore, it is possible to support the machine with stability during operation of said machine. Namely, when the machine is supported, the front handle 10 is plane passing through the center of gravity of the machine and, therefore, the weight of the machine is mainly supported by the front handle 10 during transportation and operation of the machine.
  • a vertical oscillation of the machine relative to the front handle is limited by the bifurcate supporting member 8 extending longitudinally along the bottom of the main body, while a horizontal oscillation of the machine is limited by the transversely extending lower buffer member having a relative large supporting area.
  • a suitable rigidity of the front handle necessary for supporting the machine can be obtained.
  • the rear handle 7 has its front end secured to the main body 1 through a plurality (two in the embodiment shown) of buffer members 25 and corresponding seats for receiving said buffer members, said buffer members 25 being attached to said rear handle and spaced from each other ina direction parallel to the axis 3 of the driving shaft, and said seats being provided on the upper portion of the back side of the main body 1 at locations corresponding to said buffer members respectively.
  • the other end of the rear handle 7 is coupled with the rear end of the rear handle supporting member 24 through a cylindrical bufi'er member 29.
  • the rear handle 7 forms, in cooperation with the rear handle supporting member 24, a substantially U-shaped handle perpendicular to the front handle 6. This rear handle 7 serves mainly to establish the direction of the machine.
  • the buffer member 29 is identical in construction with the buffer member 20 for the front handle 6 and secured to the rear handle 7 and the supporting member 24 by the engagement between externally threaded studs and nuts.
  • FIGS. 4, 5, 6a and 6b Another embodiment of the present invention will be described hereunder with reference to FIGS. 4, 5, 6a and 6b.
  • This embodiment is slightly different from the preceding embodiment in respect of the construction of the buifer member provided at the lower end the front handle and the construction of the buffer member provided at the upper end of the front handle, the other construction being the same as in the preceding embodiment.
  • FIGS. 4, 5, 6a and 6b same or corresponding parts are indicated by the same reference numerals.
  • two buffer members 30 are provided at the lower end of the front handle 6, which are spaced from each other in a direction parallel to the axis of the driving shaft.
  • a substantially T-shaped bifurcate supporting member 33 which consists of a section 33a extending from the lower end of said handle 6 transversely of the main body 1 and a section 33b integral with said section 33a and extending at right angles thereto up to the rear end of the main body 1.
  • Each buffer member 30 is a cylindrical body having a rectangular cross-section and has plate members 30a, 30b integrally bonded to the upper and lower surfaces thereof respectively, and is secured to the main body 1 and the bifurcate supporting member by means of bolts 31, 32 at said plate members.
  • Reference numeral 35 designates a bolt by which the sectional housing of the main body 1 is assembled.
  • the rear handle 7 shown in FIGS. 6a and 6b is similar to that shown in FIGS. 3a and 3b, but different in that while the latter is provided with a plurality of transversely spaced buffer members, the former is provided with a transversely elongate rectangular buffer member 36.
  • This rectangular buffer member 36 may alternatively be an annular buffer member having an elongate central opening 36c as indicated by the dotted line.
  • the buffer member 36 comprises a resilient body and plate members 36a, 36b attached to the upper and lower surfaces thereof, and is secured to the rear handle 7 by means of a bolt 38 which is screw-threaded into a nut 37 fixed to the underside of an outward extention of the upper plate member 36a in register with a bolt-insertion hole 380, and the rear upper wall of the main body 1 by means of a bolt 39.
  • the rear handle buffer member shown in FIGS. 3a, 3b and that shown in FIGS. 6a, 6b are slightly different in construction as described above, either of them is supported at one point by the end of the rear handle supporting member and at a plurality of points (or at a portion which can be equally regarded as a plurality of points) by the seat on the main body 1.
  • the buffer member 36 is supported in the fashion of three-point support and thus the rear handle 7 can be secured to the main body 1 with a suitable rigidity.
  • the buffer member provided at the lower end of the front handle and the buffer member or members provided at the upper end of the rear handle may optionally be exchanged to obtain a desired vibration absorbing effect.
  • the front and rear handles are independently connected to the main body through the fubber member or members, whereby the mechanical vibration generated by the driving equipments of the machine can be dispersed and absorbed by the respective handles.
  • either handle can be supported on the main body of the machine substantially in the fashion of three-point support, a suitable rigidity can be imparted to the junction between the main body and each handle and hence a horizontal oscillation and a vertical oscillation of the main body during operation of the machine are restrained. Consequently, the movement and holding of the machine by the front handle and the directioning of the machine by the rear handle-can be facilitated, and a remarkable effect can be obtained in the operation of machine which could not be achieved by the conventional supporting device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Vibration Prevention Devices (AREA)
  • Sawing (AREA)
US161729A 1971-03-09 1971-07-12 Vibration absorbing device for portable machines Expired - Lifetime US3700015A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46012620A JPS5210239B1 (de) 1971-03-09 1971-03-09

Publications (1)

Publication Number Publication Date
US3700015A true US3700015A (en) 1972-10-24

Family

ID=11810407

Family Applications (1)

Application Number Title Priority Date Filing Date
US161729A Expired - Lifetime US3700015A (en) 1971-03-09 1971-07-12 Vibration absorbing device for portable machines

Country Status (3)

Country Link
US (1) US3700015A (de)
JP (1) JPS5210239B1 (de)
DE (1) DE2138294C3 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918534A (en) * 1973-04-26 1975-11-11 Fogelholm Carl Magnus Special clutch for vibration isolated chain saws
US3934344A (en) * 1974-03-28 1976-01-27 Kioritz Corporation Portable chain saw
US3945119A (en) * 1975-01-28 1976-03-23 Kioritz Corporation Vibration isolation device for handles of chain saw
US4819742A (en) * 1987-06-12 1989-04-11 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
US4825548A (en) * 1987-03-31 1989-05-02 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
US4912848A (en) * 1989-01-09 1990-04-03 Textron, Inc. Power tool handle
US5016355A (en) * 1990-06-25 1991-05-21 Textron Inc. Vibration reducing chain saw handle
US6026910A (en) * 1998-01-13 2000-02-22 Chicago Pneumatic Tool Company Power tool and vibration isolator therefor
US20060166613A1 (en) * 2002-10-18 2006-07-27 Justus Lamprecht Hand-operated machine-tool comprising a vibration-damping rotary handle
US20220314422A1 (en) * 2019-11-25 2022-10-06 Husqvarna Ab A Hand-Held Electrically Powered Work Tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4010544A (en) * 1975-03-21 1977-03-08 Textron, Inc. Vibration reducing system for single cylinder fluid pressure engine
DE102005047882B4 (de) * 2005-10-06 2017-04-27 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525373A (en) * 1966-12-10 1970-08-25 Kyoritsu Noki Co Ltd Chain saw
US3637029A (en) * 1970-09-14 1972-01-25 Textron Inc Hand-held power tool with antivibration mount
US3651839A (en) * 1966-12-03 1972-03-28 Andreas Stihl Muschinenfabrik Portable motor saw
US3652074A (en) * 1970-06-26 1972-03-28 Mcculloch Corp Mounting means for isolating vibrational energy in chain saw machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651839A (en) * 1966-12-03 1972-03-28 Andreas Stihl Muschinenfabrik Portable motor saw
US3525373A (en) * 1966-12-10 1970-08-25 Kyoritsu Noki Co Ltd Chain saw
US3652074A (en) * 1970-06-26 1972-03-28 Mcculloch Corp Mounting means for isolating vibrational energy in chain saw machines
US3637029A (en) * 1970-09-14 1972-01-25 Textron Inc Hand-held power tool with antivibration mount

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918534A (en) * 1973-04-26 1975-11-11 Fogelholm Carl Magnus Special clutch for vibration isolated chain saws
US3934344A (en) * 1974-03-28 1976-01-27 Kioritz Corporation Portable chain saw
US3945119A (en) * 1975-01-28 1976-03-23 Kioritz Corporation Vibration isolation device for handles of chain saw
US4825548A (en) * 1987-03-31 1989-05-02 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
US4819742A (en) * 1987-06-12 1989-04-11 White Consolidated Industries, Inc. Vibration-damping control handle for a portable power tool
US4912848A (en) * 1989-01-09 1990-04-03 Textron, Inc. Power tool handle
US5016355A (en) * 1990-06-25 1991-05-21 Textron Inc. Vibration reducing chain saw handle
US6026910A (en) * 1998-01-13 2000-02-22 Chicago Pneumatic Tool Company Power tool and vibration isolator therefor
US6220367B1 (en) 1998-01-13 2001-04-24 Chicago Pneumatic Tool Company Power tool and vibration isolator therefor
US20060166613A1 (en) * 2002-10-18 2006-07-27 Justus Lamprecht Hand-operated machine-tool comprising a vibration-damping rotary handle
US7204744B2 (en) * 2002-10-18 2007-04-17 Robert Bosch Gmbh Hand-operated machine-tool comprising a vibration-damping rotary handle
US20220314422A1 (en) * 2019-11-25 2022-10-06 Husqvarna Ab A Hand-Held Electrically Powered Work Tool

Also Published As

Publication number Publication date
JPS5210239B1 (de) 1977-03-22
DE2138294C3 (de) 1975-07-17
DE2138294B2 (de) 1974-11-21
DE2138294A1 (de) 1972-09-21

Similar Documents

Publication Publication Date Title
US3700015A (en) Vibration absorbing device for portable machines
US3945119A (en) Vibration isolation device for handles of chain saw
US3409056A (en) Portable power chain saw
US3934344A (en) Portable chain saw
US4401167A (en) Vibratory tool with a vibration proof mechanism for the handle thereof
US4805868A (en) Isolation bracket assembly for engine cooling fan and motor
US3728793A (en) Chain saw with damping means
JPH07282B2 (ja) 可搬式動力チェーンソー
US3849883A (en) Chain saw
US3651839A (en) Portable motor saw
US20080099224A1 (en) Electrical Hand Power Tool with Battery Pack
US4694578A (en) Motor-driven chain saw
US4670985A (en) Vibration mount in a chainsaw
US11027349B2 (en) Power tool
US20220176511A1 (en) Protection device for a power tool, and system which comprises a protection device and a power tool
US2783792A (en) Free ended saw blade for a power operated saw
JPH0711859Y2 (ja) 回転カッターの制振装置
US3772784A (en) Holding arrangement for motor saws
US3053290A (en) Sawbuck for chain saws
US3309769A (en) Hedge trimmer having a reciprocating saw
JPS5947104A (ja) 工具ホルダ
US3372759A (en) Means for suppressing blows, shocks or vibrations in the operation of an apparatus such as a power driven hammer or tamper
US20170100852A1 (en) Guide Bar
GB1158798A (en) Improvements in and relating to Power Driven Saws
US20140059868A1 (en) Power-tool system