US3911763A - Rotary assembly for the adjustment of hydraulic throttle valves in injection molding machines - Google Patents

Rotary assembly for the adjustment of hydraulic throttle valves in injection molding machines Download PDF

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Publication number
US3911763A
US3911763A US477973A US47797374A US3911763A US 3911763 A US3911763 A US 3911763A US 477973 A US477973 A US 477973A US 47797374 A US47797374 A US 47797374A US 3911763 A US3911763 A US 3911763A
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United States
Prior art keywords
shaft
adjustment
assembly
coupling
rotary
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
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US477973A
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English (en)
Inventor
Karl Hehl
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Individual
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Individual
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Publication of US3911763A publication Critical patent/US3911763A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/04—Stops for limiting movement of members, e.g. adjustable stop
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/12—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in an indefinite number of positions, e.g. by a toothed quadrant
    • G05G5/20—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in an indefinite number of positions, e.g. by a toothed quadrant by locking a quadrant, rod, or the like carried by the member
    • G05G5/22—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for holding members in an indefinite number of positions, e.g. by a toothed quadrant by locking a quadrant, rod, or the like carried by the member by friction
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y10T74/2066—Friction
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20732—Handles
    • Y10T74/20834—Hand wheels
    • Y10T74/2084—Knob or dial

Definitions

  • the present invention relates to rotary adjustment means for throttle valves, and in particular to rotary assemblies for the adjustment of remotely located hydraulic throttle valves in injection molding machines, especially where a plurality of hydraulic throttle valves are mounted on the rear side of the machine and the corresponding adjustment knobs and dials are arranged on the front side of the machine and where some of the knobs are axially offset in relation to the throttle valves.
  • the present invention proposes to attain the above objective by suggesting a rotary adjustment assembly comprising a bearing member with a centering flange and bearing sleeve to which the adjustably clampable sleeve member forms an axial extension, the centering flange being arranged for abutment against a wall of the machine base and engaging the latter with at least one centering finger extending through a bore in said wall.
  • An additional advantageous feature of the invention results from the arrangement of three aligned bores in the machine wall cooperating with three axial extensions on the bearing member: a central larger bore receiving the bearing sleeve of the bearing member, a second smaller bore receiving a centering finger, and a third likewise smaller bore receiving a second finger, both fingers reaching beyond the machine wall.
  • the second finger serves as an abutment finger limiting the angular motions of the adjustment knob, while the centering finger also conveniently serves as a zero mark.
  • a still further advantage of the present invention resides in the possibility of arranging the rotary adjustment assembly remotely from the location of the hydraulic throttle valve itself. This feature is particularly desirable in the case of injection molding machines, where a number of hydraulic throttle valves are arranged in a valve cluster on the back side of the machine, while the associated control knobs are arranged on the front side of the machine. In this case, it is not only necessary to provide the rotary connections reaching through the machine base, it may also be desirable, or necessary, to space the adjustment knobs on the front of themachine further apart than the spacing of the clustered throttle valves.
  • the present invention by suggesting a bearing member with an integral centering flange and bearing sleeve in axial alignment with the clampable sleeve member, provides independent bearing support for the adjustment assembly, making it possible to transmit the adjustment motion between the adjustment knob and the throttle valve via axially yielding transmission means.
  • a convenient version of such a yielding transmission means is suggested, the latter including a coupling shaft with a cross pin on each extremity, the pins engaging cooperating grooved or slotted coupling hubs attached to the adjustment shaft and to a shaft extension of the throttle valve, respectively, thereby forming universal joints with limited angular yielding capability.
  • bearing member with the bearing sleeve, centering finger, abutment finger, and clampable sleeve member is designed to be injection-moldable as one integral part.
  • the coupling hub of the universal joint, the adjustment knob and the dial hub of the suggested rotary adjustment assembly are likewise designed to be injection-moldable.
  • FIG. 1 shows a longitudinal cross section of a rotary adjustment assembly embodying the invention
  • FIG. 2 is an axial end view of the bearing member of the assembly of FIG. 1;
  • FIG. 3 shows the bearing member of FIG. 2 in a plan view
  • FIG. 4 shows the bearing member of FIG. 2 from the opposite axial side.
  • the rotary adjustment assembly of the invention is mounted in a wall 10 which, for example, would be the front wall panel of the machine base of an injection molding machine.
  • the rotary assembly would in this case reach across the machine base to its rear wall (not shown in the drawing) on which would be mounted a number of hydraulic throttle valves.
  • the rotary assembly illustrated serves for adjusting the valve setting through rotation of the assembly from the front side of the machine, where the operator is normally stationed.
  • the hydraulic system of an injection molding machine normally includes a plurality of such throttle valves, controlling the speed of its hydraulic drives.
  • the corresponding throttle valves may be arranged in the form of a valve cluster mounted to the rear wall of the machine base, each throttle valve being coupled to a rotary adjustment assembly reaching through the machine base.
  • the machine wall has three bores for mounting of the rotary assembly, a large central bore 11, a first smaller bore 12, and a second smaller bore 13 arranged opposite bore 12.
  • a bearing member engages these three bores with matching axial extensions, thereby centering and positioning it on wall 10.
  • the central one of these extensions is a bearing sleeve 21, the first smaller extension is an abutment finger 23 and the second smaller extension is a centering finger 24.
  • the bearing sleeve 21 of the bearing member 20 thus forms a central journal for a matching adjustment shaft 30 which extends through sleeve 21 across the wall 10.
  • To the outer end portion of the adjustment shaft 30 is fixedly attached a dial hub 190 by means of an elastic pin 140 which extends transversely through the dial hub 190 and shaft 30.
  • the dial hub 190 includes a dial flange 120 engaging the wall 10 from the outside. To the inner end portion of shaft 30 is attached a coupling hub 70 which carries two set screws 60 engaging a positioning bore 50 in the shaft 30. The coupling hub 70 thus provides a bearing face 71 with which it engages a flange portion 26 of the bearing member 20. The two hubs on the adjustment shaft 30 thus confine between them the bearing member 20 and the wall 10, thereby axially positioning these two parts and eliminating the need for additional fasteners, while at the same time determining the axial position of shaft 30.
  • the dial hub 190 carries a cap-shaped adjustment knob 170, by means of which the adjustment shaft 30 can be rotated. The knob 170 is clamped against the hub 190 by means of a clamping screw 160 and a captive nut 150, the knob engaging the hub by means of a cross-shaped profile 171.
  • the knob 170 may further include an identification disc 180. i
  • the bearing member 20 of the rotary assembly which not only serves to align and support the adjustment shaft 30, but also includes a means for providing an adjustable frictional resistance on the rotary assembly, in order to prevent any movement of the latter under operating vibrations, or as a result of inadvertant contact with the knob 170.
  • the bearing member 20 includes on its inwardly facing side an extension of the bearing sleeve 21 in the form of an adjustably clampable sleeve member 22.
  • This sleeve member 22 includes an outer flange portion 26 and an inner flange portion 27, giving the sleeve member 22 the shape ofa clamping collar or pipe clamp.
  • the bore 200 in one leg portion is threaded, to cooperate with a suitable clamping screw (not shown).
  • the inner flange portion 27 of this clampable sleeve member 22 is integrally attached to the main flange 28 of the bearing member 20, but only on a portion of its circumference, a radial slit 210 separating the upper leg portion and the flange portion 27 (FIG. 2) from flange 28.
  • the two smaller axial extensions of the bearing member 20 serve each a special purpose in addition to that of positioning and centering the rotary adjustment assembly in the machine wall 10.
  • the abutment finger 23, by reaching into a sector-shaped recess 130 of the dial flange 120 of the dial hub 190, provides angular displacement limits for the assembly, the displacement limits being determined by the sector angle of recess 130.
  • the three axial extensions 21, 23, and 24, as well as the clampable sleeve member 22 are integral parts of bearing member 20, being designed for production as an injection-molded plastic part.
  • the dial hub 190, the knob 170, and the coupling hub are designed for injection molding from plastic material.
  • a hydraulic throttle valve which is to be adjusted by means of the novel rotary adjustment assembly has a shaft extension 270 (FIG. 1) carrying a coupling hub 230 which is similar to the coupling hub 70 on shaft 30. Between these two coupling hubs extends a coupling shaft engaging longitudinal grooves 100 and 290 of the coupling hubs 70 and 230, respectively, by means of cross pins and 240 in the end portions of the coupling shaft 80.
  • FIG. 1 Although the shaft assembly is shown in FIG. 1 in axial alignment with the shaft extension 270 of the throttle valve, it is obvious from the drawing that such alignment is not a prerequisite with the embodiment illustrated.
  • An axially offset arrangement may be desirable or necessary, for example, when several hydraulic throttle valves are arranged in a close cluster, at distances from each other which would require the adjustment knobs 170 to be located too close to each other for convenient setting by hand.
  • the adjustment assembly of FIG. 1 therefore allows for a certain degree of angular deviation between the shaft extension 270 of the throttle valve and the coupling shaft 80, on the one hand, and between the coupling shaft 80 and the adjustment shaft 30, on the other hand.
  • the grooves and 290 of the coupling hubs and the cross pins 90 and 240 of the coupling shaft 80 then form universal joints for the transmission of the rotational displacement of the knob 170 to the shaft extension 270.
  • the central bores of the coupling hubs 70 and 230 are oversize with respect to the diameter of the coupling shaft 80, while the grooves 100 and 290 guide the cross pins 90 and 240, respectively, with minimal radial clearance.
  • a further simplification of design is achieved when, instead of providing oversize hub bores and 260, the diameter of the coupling shaft 80 is made smaller than the diameter of shaft 30 and shaft extension 270.
  • coupling hubs and coupling shaft could be replaced by other coupling means permitting transmission of rotary displacement over offset axes of the throttle valve and adjustment knob.
  • Such transmission could, for instance, also be accomplished by means of a flexible shaft, or with coupling means including only one universal joint.
  • a rotary adjustment assembly adapted for adjustting the angular setting of a rotary control member, such as, for example, a hydraulic throttle valve of an injection molding machine, the assembly comprising in combination:
  • a stationary machine wall having a central bore and at least one parallelly spaced smaller bore extending therethrough;
  • a stationary bearing member having a centering flange abutting against the wall from one side, said flange including a bearing sleeve in coaxial alignment with the central bore of the wall and a smaller axial extension engaging said smaller bore;
  • a rotatable adjustment shaft extending through the bearing member to both sides of the wall, said shaft being joumalled in the bearing sleeve, thereby defining the rotational center axis of the assembly;
  • the bearing sleeve extends axially from the centering flange through the central bore of the wall;
  • the smaller axial extension extends through its associated smaller bore a distance beyond the wall
  • the shaft rotating means includes a dial hub and a dial flange mounted on the shaft and axially abutting against the stationary wall from the side opposite the centering flange;
  • said dial hub flange includes an axial recess inside which is received the end of said smaller axial ex- J: 6 tension, the latter therebyserving as an abutment finger, wherebythe arcuate width of said recess and the diameter 'of'said abutment finger determine the angular displaceability of the rotary adjustment assembly; 5.
  • the shaft rotating means further includes a knob which is removably attached to the dial hub and which engages the latter by means of a crossshaped profile, the hub having matching recesses. 6.
  • the dial hub and the dial flange are one integral part and fixedly attached to the adjustment shaft, thereby positioning the latter relative to the stationary wall in one axial direction; and the adjustment shaft issolidary with a collar member engaging the bearing member from the opposite axial direction, thereby positioning the shaft and the bearing member relative to the stationary wall in the other axial direction.
  • the shaft coupling means includes a coupling hub which is fixedly attached to the adjustment shaft, the latter thereby serving as said collar member.
  • the rotation transmitting means includes a coupling hub fixedly attached to the shaft extension of the control member, and a coupling shaft extending between the coupling hubs of the shaft extension and adjustment shaft and engaging both hubs in the manner of a universal joint.
  • each coupling hub extension includes a bore in alignment with the shaft and a pair of diametrally opposite longitudinal grooves open to the bore;
  • the coupling shaft has end portions received within the bores of the two coupling hub extensions, the diameter of the former being considerably smaller than the diameter of the latter; and each shaft end portion carries a cross pin of a diameter corresponding to the width of said grooves in the coupling hubs, thereby connecting the adjust able sleeve member;
  • the shaft coupling means includes two injectionmolded coupling hubs;
  • the shaft rotating means includes an integrally injection-molded dial hub and dial flange and a detach able, likewise injection-molded knob.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
US477973A 1973-07-05 1974-06-10 Rotary assembly for the adjustment of hydraulic throttle valves in injection molding machines Expired - Lifetime US3911763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732334243 DE2334243A1 (de) 1973-07-05 1973-07-05 Bedienungseinrichtung, insbesondere fuer ein drosselventil an einer spritzgiessmaschine

Publications (1)

Publication Number Publication Date
US3911763A true US3911763A (en) 1975-10-14

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ID=5886045

Family Applications (1)

Application Number Title Priority Date Filing Date
US477973A Expired - Lifetime US3911763A (en) 1973-07-05 1974-06-10 Rotary assembly for the adjustment of hydraulic throttle valves in injection molding machines

Country Status (9)

Country Link
US (1) US3911763A (en, 2012)
JP (1) JPS5028556A (en, 2012)
CA (1) CA1008680A (en, 2012)
CH (1) CH566591A5 (en, 2012)
DE (1) DE2334243A1 (en, 2012)
FR (1) FR2235790B3 (en, 2012)
GB (1) GB1456147A (en, 2012)
IT (1) IT1007999B (en, 2012)
NL (1) NL7405588A (en, 2012)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2222228A (en) * 1988-07-22 1990-02-28 Oliver Engineering Limited Valves
JP3287663B2 (ja) * 1993-09-17 2002-06-04 清原 まさ子 制御器
DE9420804U1 (de) * 1994-12-23 1995-02-16 Bosch-Siemens Hausgeräte GmbH, 81669 München Gasherd mit Schalteinheit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198923A (en) * 1961-05-10 1965-08-03 Inductosyn Corp Rotor indicating device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3198923A (en) * 1961-05-10 1965-08-03 Inductosyn Corp Rotor indicating device

Also Published As

Publication number Publication date
GB1456147A (en) 1976-11-17
CA1008680A (en) 1977-04-19
IT1007999B (it) 1976-10-30
FR2235790A1 (en, 2012) 1975-01-31
NL7405588A (nl) 1975-01-07
CH566591A5 (en, 2012) 1975-09-15
JPS5028556A (en, 2012) 1975-03-24
DE2334243A1 (de) 1975-01-23
FR2235790B3 (en, 2012) 1977-02-18

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