US3651839A - Portable motor saw - Google Patents

Portable motor saw Download PDF

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Publication number
US3651839A
US3651839A US29763A US3651839DA US3651839A US 3651839 A US3651839 A US 3651839A US 29763 A US29763 A US 29763A US 3651839D A US3651839D A US 3651839DA US 3651839 A US3651839 A US 3651839A
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United States
Prior art keywords
housing
motor
frame
vibration damping
saw according
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
US29763A
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English (en)
Inventor
Andreas Stihl
Ewald Abt
Albrecht Rauh
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.)
Andreas Stihl AG and Co KG
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Andreas Stihl AG and Co KG
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Application filed by Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
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Publication of US3651839A publication Critical patent/US3651839A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
    • F16F3/087—Units comprising several springs made of plastics or the like material
    • F16F3/0873—Units comprising several springs made of plastics or the like material of the same material or the material not being specified
    • F16F3/0876—Units comprising several springs made of plastics or the like material of the same material or the material not being specified and of the same shape
    • 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

Definitions

  • ABSTRACT Related Application Data A portable motor saw having a housing, front and rear handle [63] Continuation of sen 687 703 4 1967 aban means and frame means rigidly interconnecting said housing doned and rear handle means in spaced relationship, said frame means when seen in plan view having a contour substantially 30] Foreign Application Priority Dam corresponding to the contour of said housing, while a plurality of elastic vibration damping means is interposed between said NOV. 24, Germany .-St housing and said handle means,
  • the present invention relates to a portable motor saw with a handle member at the front portion of the saw and a handle member at the rear portion of the saw while a rigid connection is provided between said handle members.
  • the handles are of an elastic material and are separated from the respective adjacent housing portion of the saw by vibration damping hearing means.
  • FIG. 1 illustrates a motor chain saw according to the invention, partially in view and partially in section.
  • FIG. 1a is a cutout from the front handle portion.
  • FIG. 2 is a top view of the motor chain saw according to FIG. 1, partially in view and partially in section.
  • FIG. 3 illustrates a further embodiment of the present invention as seen from the top.
  • FIG. 4 is a top view of the motor chain saw of FIG. 3.
  • FIG. 5 shows the motor chain saw of FIG. 3 as seen from the rear.
  • the portable motor chain saw according to the present invention is characterized primarily in that the rigid connection between the handle members is formed by a circumferential frame arranged above the motor chain saw and, when seen from the top, approximately conforming to the contour of the plan view of the motor housing.
  • the relatively considerable mass of the handle members in view of the circumferential frame further improves the damping of the motor vibrations.
  • the circumferential frame protects the air filter located near the top side of the motor housing and also protects the carburetor against shock and damage so that these elements are protected against damage even when handled roughly and when the motor chain saw is carelessly used.
  • the circumferential frame extends substantially parallel to the surface of the motor housing so that the said frame will not interfere with the operation and handling of the motor chain saw.
  • the motor housing and the saw unit will even be better protected against shocks when the circumferential frame protrudes somewhat beyond the plan view of the housing.
  • the front portion of the circumferential frame is through the intervention of vibration damping bearing means mounted on the motor housing.
  • vibration damping bearing means mounted on the motor housing.
  • the degree of freedom of the vibration damping bearing means is preferably parallel to the guiding rail for the saw chain so that the guiding rail will be able relative to the handle members to vibrate only parallel to its plane. In this way an accidental tilting of the guiding rail during the cutting operation will be prevented, in other words, the guiding rail is prevented from getting out of the cutting plane and jamming in the cutting groove.
  • the vibration damping bearing means are formed by two sleeves coaxially arranged with regard to each other and formed of vibration damping material.
  • the outside of said sleeves rests on the motor housing.
  • the handle members or the supporting frame are, preferably by means of a clamp, connected to the central portion of said sleeves.
  • the circumferential frame excels by a high stability and low weight and can be produced particularly simply when its cross section has a downwardly opening U-shaped profile, preferably castable profile.
  • the outer leg of the profile is preferably longer than the inner leg which latter is advantageously offset.
  • the front and/or rear handle members are by means of an intermediate member, such as a flange, connected to the supporting frame whereby a rigid connection is obtained between the handle members and the circumferential frame.
  • an intermediate member such as a flange
  • the rear handle member merges without any material steps gradually into the plane of the supporting frame so that the latter as well as the handle member can equally well be grasped, and a catching of branches and twigs on protruding portions of the saw will be avoided.
  • the vibration stroke of the frame is limited by an abutment.
  • the motor chain saw shown therein comprises a motor housing 1 which contains the driving unit formed by a two-cycle internal combustion engine or the like.
  • the front side of the motor housing 1 has a guiding rail 5 connected thereto.
  • Rail 5 is arranged in a plane which isperpendicular to the axis of rotation of the crankshaft of the driving engine and has guided thereon a saw chain (not shown) driven by the driving motor.
  • a handle member 8 which extends around the housing portion 3 housing the guiding rail 5.
  • the handle member 8 has at least one portion thereof connected to the housing 1 through the intervention of a vibration damping bearing means 23, 23a in the form of a bonded rubber pad or a vibration dampening connector, as used for instance in the aviation industry.
  • the rear side 4 of the housing 1 has connected thereto a further handle member 9 which forms a rearward extension of the housing 1;
  • At the bottom side of the handle member 9 there is provided an adjusting means 5 for controlling the motor speed.
  • the rear end 6 of the handle member 9 is through the intervention of a vibration damping bearing means 13 connected to an arm 7 which in its turn is connected to the bottom side of motor housing 1 by means of a flange 28. Arm 7 protrudes rearwardly beyond the motor housing 1 to an extent corresponding to said handle member 9.
  • the bearing 13 comprises two coaxially arranged sleeves 13', 13" which flare in the direction toward each other.
  • the sleeves 13', 13" are within the areas of those ends thereof which face away from each other held by means of a bolt 14 which is located in the arms l5, 16.
  • a clamp 17 Within the area in which the two damping bodies 13, 13" meet each other, there is provided a clamp 17, said clamp 17 being located in an annular groove formed by the two damping sleeves 13', 13".
  • the handle member 9 is connected to the damping sleeves 13, 13''.
  • a circumferential frame 10 which has a contour approximately similar to the plan view of the motor housing.
  • the circumferential frame 10 is located above the motor housing 1 and is approximately parallel to the top side 11 thereof.
  • the circumferential frame 10 which is substantially trapezoidal has its rear end connected to the handle member 9 by means of a corresponding plate-shaped flange 18 while, within the range of its front side, said frame 10 is connected to the handle member 8 by means of an intermediate member 19.
  • the intermediate member 19 is upwardly inclined and protrudes beyond the circumferential frame 10 while its cross section (FIG. 2) is substantially trapezoidal.
  • the circumferential frame 10 has a profile corresponding to a downwardly directed U, the outer leg 20 of said U-shaped profile being longer than the inner stepped leg 21.
  • the motor housing 1 has connected thereto bearing supports 22 for receiving the vibration damping bearing means 23 which comprises two damping sleeves 23, 23" to which the circumferential frame 10 is connected by means of an inwardly directed clamp 24.
  • the vibration damping bearing means 23 is, when viewing the motor chain saw from the top, located approximately completely below the front transverse portion 25 of the circumferential frame 10 so that it is covered up.
  • the frame portions 25, 25', 25" of the circumferential frame protrude on all sides slightly beyond the motor housing 1, when seen in top view according to FIG. 2, so that the motor housing is laterally from the front and from the rear protected against shock.
  • the rear handle member 9 merges with its top surface approximately gradually, i.e., without major interruptions, with the surface of the circumferential frame 10 whereby a stable and roundedoff upper contour of the saw is obtained so that branches or twigs cannot catch on sharp corners or edges.
  • the rear handle member 90 forms one piece with the circumferential frame 10a.
  • the lower arm 70 the end of which has linked thereto the rear end of the handle member 9a through the vibration damping bearing means 13, forms one piece with the corresponding part of the motor housing 10.
  • a tank 26 is located within the circumferential frame 10a which may receive fuel or oil.
  • the outer contour of said tank 26 extends substantially parallel to the corresponding contour of the circumferential frame 10. Only a closure member 27 for the tank 26 protrudes in upward direction beyond the circumferential frame 10a.
  • the bolts as for instance the bolts 14 of the rear vibration damping bearing means 13, simultaneously serve as abutments for the maximum deformation of the vibration damping sleeves since said sleeves, in the course of their relative movement toward bolts 14, have their inner surface engage said bolts.
  • the said bolts are located coaxially in said vibration damping sleeves.
  • the lower end of the front handle member 8a is connected to the motor housing by means of the vibration damping bearing means 23a, while said vibration damping bearing means 23:: have the same axial direction as the other two vibration damping bearing means 23, 13. That end of the handle member 8a which is connected to said bearing means 23a extends coaxially with regard to the vibration damping bearing means 23a pertaining thereto.
  • the vibration damping bearing means 23a which holds the lower end of the front handle member 8a is located at one side of the motor housing la, whereas the vibration damping bearing means 23 directly supporting said circumferential frame 10a is located at the other side of the motor housing 1a.
  • the rear vibration damping bearing means 13 When viewed in the longitudinal direction of the guiding rail 5, the rear vibration damping bearing means 13 is located approximately between the two front vibration damping bearing means 23, 230 while the said rear vibration damping guiding means 13 is located in spaced relationship to and behind the motor housing la. Since the bearing means 23 which is directly connected to the circumferential frame 101: is arranged at least partially below the front frame portion and since furthermore the vibration damping bearing means 23a which carries the lower end of the front handle member 8a is provided on the front side of the motor housing 1a, the two front vibration damping bearing means 23, 23a are offset with regard to each other in the longitudinal direction of the guiding rail 5, one bearing means 23 being located on the top side of the motor housing 1a whereas the other bearing means 230 is located on the bottom side of the motor housing 1a.
  • the upper front vibration damping bearing means 23 and the rear vibration damping bearing means 13 are of approximately the same design.
  • the cir cumferential frame 10a protrudes laterally and toward the rear beyond the motor housing la but not beyond the chain cover l'a provided on one side of the motor housing, nor does the circumferential frame 10a protrude beyond the cover I'a on the other side of the housing.
  • the connection of the front handle member 8a to the intermediate member 19 is, when viewed from the top according to FIG. 4, located directly ahead of the upper vibration damping bearing means 23.
  • the lower end of the front handle member 8 pertaining to the motor chain saw of FIGS. 1 and 2 and formed by a bent pipe is connected to the motor housing by means of the vibration damping bearing means 230.
  • the bearing means 23a has a cylindrical portion 30 of elastic material, such as rubber, respectively connected to two oppositely located end faces of said cylindrical portion 30 are plates 31, 32. This connection may be effected for instance by vulcanization.
  • the two plates 31, 32 are respectively provided with threaded bolts 33, 34 which are coaxially arranged with regard to the damping body 30.
  • One threaded bolt 33 is threaded into a threaded sleeve 35 which is arranged in the lower end 29 of handle member 8 which end 29 is coaxial with regard to the damping body 30.
  • the said sleeve 35 is positively held by means of an annular bead which engages a circumferential groove pressed out of the handle member 8.
  • the threaded bolt 33 is tightened to such an extent that the plate 31 is braced in a play-free manner against the end face of the handle member 8.
  • the bolt 34 of the other plate 32 is connected to a tubular member 37 which has a substantially circular cross section.
  • the tubular member 37 in its turn is in a manner not shown connected to the bottom side of the motor housing, for instance by means of upwardly directed screws.
  • the two plates 31, 32 are parallel to the plane of the guiding rail 5 in such a way that the longitudinal axis of the damping body 30 is located perpendicular to the plane of the guiding rail 5 and thus is located parallel to the longitudinal axes of the remaining vibration damping bearing means 13, 23.
  • the diameter of the damping body 30 corresponds to the diameter of the handle member 8.
  • a dish spring 38 between the damping body 30 and sleeve 35 there is provided between the damping body 30 and sleeve 35 there is provided a dish spring 38, and similarly a dish spring 39 is provided between member 30 and tubular member 37.
  • a portable motor saw which comprises: a motor housing, front transversely extending hand graspable front handle means and longitudinally extending hand graspable rear handle means respectively associated with the front and rear portions of said housing, rigid frame means extending between said front and rear handle means and rigidly fixed thereto, said frame means when seen in plan view having a contour substantially corresponding to the contour of said housing, and comprising longitudinal side rail portions and transverse front and back rail portions arid being open between said portions, said frame means being spaced vertically upwardly from the top wall of said housing, elastic vibration damping means interposed between said housing and the ends of said handle means remote from said frame means, and a further elastic vibration damping means interposed between the front rail portion of said frame means and said housing.
  • said elastic vibration damping means are each formed by a pair of coaxially arranged sleeves having their outer ends connected to said housing, and which includes connecting means arranged at those ends of each pair of coaxially arranged sleeves which face each other, said connecting means being connected to the respective adjacent handle means and to said front rail portion of said frame means.
  • each said rail portion of said frame means is an inverted U-shape in crosssection, the outwardly located leg of said cross-section being longer than the inwardly located leg thereof.
  • a motor saw according to claim 1 which includes an intermediate member interposed between and rigidly interconnecting said front handle means and the front rail portion of said frame means, said intermediate member protruding upwardly and forwardly from said frame means.
  • a motor saw according to claim l in which said housing has a longitudinal arm fixed to the rear thereof at the bottom and projecting to the rear, said arm at its rear end being connected to the end of said rear handle means remote from said frame means, said elastic vibration damping means pertaining to said rear handle means being interposed between said rear handle means and said longitudinal arm.
  • a motor saw according to claim 3 which includes means for limiting the vibrationary movement of said frame means relative to said housing.
  • a motor saw according to claim 8 in which said means for limiting the movement of said frame means due to vibration includes bolt means coaxial with and extending through said sleeve means and supported by said handle means.
  • a motor saw according to claim ll in which said front handle means is curved in a substantially vertical plane so as to be concave toward said housing and the lower end of said front handle means is connected to said motor housing through the intervention of one of said vibration damping means.
  • said elastic vibration damping means includes: two vibration damping bearing means spaced from each other in transverse direction of said frame means and located near the front of said motor housing and which is adjacent to said guiding rail means, and one vibration damping bearing means located at the rear end of said housing and which is remote from said guiding rail means.
  • a motor saw according to claim 13 which includes a cylindrical member inserted into said lower end of said front handle means and connected thereto, and threaded bolt means threadedly engaging said cylindrical member and connecting said one plate means thereto.
  • a motor saw according to claim 113 in which said cushioning member has a diameter approximately equalling the diameter of the adjacent end of said front handle means.
  • a portable motor saw which comprises:
  • a motor housing front transversely extending hand graspable front handle means and longitudinally extending hand graspable rear handle means located near the front and rear portions of said housing respectively, rigid frame means above said housing extending between said front and rear handle means and rigidly fixed thereto, said frame means-when seen in plan view having a contour substantially corresponding generally to the contour of said housing, and comprising longitudinal side portions and transverse front and back portions integral with said side portions,'said frame means being spaced vertically upwardly from the top wall of said housing, first elastic vibration damping means interposed between said housing and said handle means remote from the connection of said handle means with said frame means, and a second elastic vibration damping means interposed between the front portion of said frame means and said housing.
  • a motor saw according to claim 18, which includes blade-like saw chain guiding rail means connected to and projecting forwardly from the front of said housing and in which said first and second vibration damping means have a major degree of resilience in a direction substantially parallel to the plane of said guiding rail means and a substantially lesser degree'of resilience in a direction normal to said plane of said guiding rail means.
  • each said portion of said frame means includes an upstanding outer leg, said legs forming the outer contour of said frame.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Vibration Prevention Devices (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Food-Manufacturing Devices (AREA)
US29763A 1966-12-03 1970-04-27 Portable motor saw Expired - Lifetime US3651839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1528034A DE1528034C3 (de) 1966-12-03 1966-12-03 Tragbare Motorsäge

Publications (1)

Publication Number Publication Date
US3651839A true US3651839A (en) 1972-03-28

Family

ID=7460891

Family Applications (1)

Application Number Title Priority Date Filing Date
US29763A Expired - Lifetime US3651839A (en) 1966-12-03 1970-04-27 Portable motor saw

Country Status (8)

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US (1) US3651839A (de)
AT (1) AT279139B (de)
BE (1) BE707383A (de)
CH (1) CH473655A (de)
DE (1) DE1528034C3 (de)
FR (1) FR1549639A (de)
GB (1) GB1152547A (de)
NO (1) NO130816C (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700015A (en) * 1971-03-09 1972-10-24 Kyoritsu Noki Co Ltd Vibration absorbing device for portable machines
US3728793A (en) * 1971-04-15 1973-04-24 Fullerton A M Chain saw with damping means
US3733700A (en) * 1970-08-19 1973-05-22 J Notaras Dual grip handle for power tools
US3772784A (en) * 1969-10-16 1973-11-20 Stihl Maschf Andreas Holding arrangement for motor saws
US3849883A (en) * 1974-01-02 1974-11-26 Outboard Marine Corp Chain saw
US4117594A (en) * 1977-10-02 1978-10-03 Textron Inc. Guide bar mount for chain saw
US4135301A (en) * 1976-05-28 1979-01-23 Firma Andreas Stihl Motorized chain saw
US4138812A (en) * 1977-10-14 1979-02-13 Mcculloch Corporation Vibration isolation system for chain saw structures
DE2743043A1 (de) * 1977-09-24 1979-04-05 Stihl Maschf Andreas Tragbares arbeitsgeraet
US4670985A (en) * 1984-12-17 1987-06-09 Mcculloch Corporation Vibration mount in a chainsaw
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
US5016355A (en) * 1990-06-25 1991-05-21 Textron Inc. Vibration reducing chain saw handle
US5796198A (en) * 1994-09-27 1998-08-18 Honda Giken Kogyo Kabushiki Kaisha Electric motor for a power steering apparatus
US20020184987A1 (en) * 2001-06-11 2002-12-12 Johannes Menzel Portable work apparatus
US10293473B2 (en) * 2013-05-28 2019-05-21 Koki Holdings Co., Ltd. Portable working machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE421682B (sv) * 1976-12-29 1982-01-25 Partner Ab Berbart forbrenningsmotordrivet handredskap bestaende dels av en motorenhet, som framtill uppber en verktygsberare, t ex en styrklinga for en sagkedja och dels en pa motorenheten medelst elastiska forbindningsorgan f...
CN112594313B (zh) * 2020-12-15 2022-08-30 航天科工深圳（集团）有限公司 减振结构以及包含该减振结构的感知装置搭载机构和探测无人机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1720545A (en) * 1927-03-05 1929-07-09 Rodic Rubber Company Resilient shackle
US3372718A (en) * 1965-09-03 1968-03-12 Outboard Marine Corp Chain saw
US3409056A (en) * 1965-09-13 1968-11-05 Stihl Maschf Andreas Portable power chain saw

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1720545A (en) * 1927-03-05 1929-07-09 Rodic Rubber Company Resilient shackle
US3372718A (en) * 1965-09-03 1968-03-12 Outboard Marine Corp Chain saw
US3409056A (en) * 1965-09-13 1968-11-05 Stihl Maschf Andreas Portable power chain saw

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772784A (en) * 1969-10-16 1973-11-20 Stihl Maschf Andreas Holding arrangement for motor saws
US3733700A (en) * 1970-08-19 1973-05-22 J Notaras Dual grip handle for power tools
US3700015A (en) * 1971-03-09 1972-10-24 Kyoritsu Noki Co Ltd Vibration absorbing device for portable machines
US3728793A (en) * 1971-04-15 1973-04-24 Fullerton A M Chain saw with damping means
US3849883A (en) * 1974-01-02 1974-11-26 Outboard Marine Corp Chain saw
US4135301A (en) * 1976-05-28 1979-01-23 Firma Andreas Stihl Motorized chain saw
DE2743043A1 (de) * 1977-09-24 1979-04-05 Stihl Maschf Andreas Tragbares arbeitsgeraet
US4117594A (en) * 1977-10-02 1978-10-03 Textron Inc. Guide bar mount for chain saw
US4138812A (en) * 1977-10-14 1979-02-13 Mcculloch Corporation Vibration isolation system for chain saw structures
US4670985A (en) * 1984-12-17 1987-06-09 Mcculloch Corporation Vibration mount in a chainsaw
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
US5016355A (en) * 1990-06-25 1991-05-21 Textron Inc. Vibration reducing chain saw handle
US5796198A (en) * 1994-09-27 1998-08-18 Honda Giken Kogyo Kabushiki Kaisha Electric motor for a power steering apparatus
US20020184987A1 (en) * 2001-06-11 2002-12-12 Johannes Menzel Portable work apparatus
US6799373B2 (en) * 2001-06-11 2004-10-05 Andreas Stihl Ag & Co. Portable work apparatus
US10293473B2 (en) * 2013-05-28 2019-05-21 Koki Holdings Co., Ltd. Portable working machine

Also Published As

Publication number Publication date
DE1528034A1 (de) 1969-09-25
BE707383A (de) 1968-04-16
GB1152547A (en) 1969-05-21
FR1549639A (de) 1968-12-13
CH473655A (de) 1969-06-15
DE1528034C3 (de) 1979-03-15
NO130816C (de) 1975-02-19
AT279139B (de) 1970-02-25
NO130816B (de) 1974-11-11
DE1528034B2 (de) 1976-06-10

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