Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
  • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
  • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
  • B25B27/24—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same mounting or demounting valves
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
  • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
  • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
  • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
  • B25B27/24—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same mounting or demounting valves
  • B25B27/26—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same mounting or demounting valves compressing the springs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
  • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
  • B25H1/0007—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby for engines, motor-vehicles or bicycles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
  • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
  • B25H1/14—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting the bench top
  • B25H1/18—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting the bench top in inclination

Definitions

• the invention relates to equipment designed to support and position the cylinder heads of internal combustion engines, petrol and diesel alike, to the end of facilitating, simplifying and speeding up
• the cylinder block is sandwiched between the sump at bottom, which contains lubricating oil, and a head uppermost; the head is a one-piece casting generally
• servicing work is that carried out on the cylinder head, which must be separated from the block and then manoeuvred such as to enable a number of single operations that require its being set in a variety of positions, tilted, angled, and so forth; as those
• the average cylinder head is a component of not inconsiderable weight.
• the operations carried out most frequently are those involving removal of the camshaft and of the valves and their springs, grinding of the valves, cleaning
• the object of the invention is to embody equipment designed to accommodate and support the cylinder head of an internal combustion, holding it fast in one set position and enabling a single mechanic to carry out all of the operations mentioned above in a much shorter time than possible hitherto, aided by systems for manoeuvring the head and its component parts .
• a further object of the invention is to embody equipment that will angle, lift and rotate a head rigidly associated with it into whichever positions are most suitable or most convenient for the various operations n hand.
• Another object of equipment embodied according to the invention is to faci litate work on single parts of the head by providing additional means that wi ll permit of effecting their removal and refitment with ease, and with no more than one person required.
• a no less important object of the invention is that of embodying means designed to reduce the physical effort required of the mechanic by affording ready access to the more hidden recesses of the head from a comfortable stance, thereby cutting the man hour requirement by more than 50% and obtaining notably enhanced quality in the work carried out.
• fig 1 shows a perspective of equipment according to the invention, supporting a cylinder head
• fig 2 is a side view of the equipment in fig 1
• fig 3 is a partly-exploded perspective showing the embodiment and application of a hinged arm forming part of the equipment
• fig 4 shows a set of schematic representations that illustrate certain of the positioning possibi lities afforded with the head supported by the equipment.
• 1 denotes a substantially parallelepiped framework which, in a preferred embodiment, wi ll be fabricated from single members 101 fitted together with removable fastening means 102 such as screws or bolts, but could equally well be a one-piece construction, enclosed or open, or whatever.
• top side of such a framework 1 is fitted with permanently attached but movable means 2 designed to traverse an axial feed mechanism 3, together with a vertically disposed shaft 4 operated by the feed mechanism, moving them as one through a horizontal plane lying at right angles to the shaft 4; such traversing means 2 might be power-driven by suitable means (not illustrated), or hand-operated.
• 5 denotes a work table 5 of quadrangular (preferably rectangular) shape located beneath the traversing means 2 and the shaft 4, attached via its opposite ends to the framework 1 at points coinciding with a horizontal axis 6, by way of rotating and clamping means 7.
• the work table 5 is rotatable about the horizontal axis 6 through a complete revolution, and can be made fast at any given angle within the full 360° by applying the clamping means 7.
• Equipment according to the invention also features at least one pair of hinged arms 12 each of which comprises at least two hinges 13 that interconnect an end section 14, at least one middle section 15, and a base section 16 (see fig 3) .
• the end, middle and base sections 14, 15 and 16 can be separated one from the other by removing the cylindrical pins 17 from the hinges 13; by the same token, the single sections can be rigidly associated one with the next at a given mutual angle by applying conventional fastening means to the selfsame cylindrical hinge pins 17, e.g. nuts or the like.
• 50 denotes the cylinder head of an internal combustion engine (petrol in this instance, though the application remains identical for diesel) resting on the work table 5 and connected rigidly to the rai l 8 by way of two arms 12 as described above, the rigid connection being effected by screwing the end section 14 of each arm 15 into one of the spark plug, or injector seats 51 offered by the head 50.
• the end section 14 is embodied in two parts 114 and 115.
• the first such part 114 which is hollow and internally threaded, exhibits one end 116 with an external thread of size and pitch to match that of the seat 51, whereas the remaining end 117 is enlarged to form a nut; one end 118 of the second part 115 is threaded to enable its being screwed into the first part 114, and provided with a thread and locknut 119 to enable tightening the two parts 114 and 115 together.
• the remaining end of the second part 115 is embodied in such a way as to create one of the hinges 13, in conjunction with the corresponding end of the middle section 15.
• One end of the base section 16 exhibits a socket 161 for acceptance of an ordinary fastener, e.g.
• the work table 5 is rotatable about its axis 6 in rigid association with the rai l 8, as discernable from fig 4. Rotation is produced by the rotating and clamping means 7 located at each end, each set of which, in a preferred embodiment ,- takes the form of a pair of coaxial friction discs 71, one rigidly associated with the table 5 and the other with the framework 1, and a clamp lever 72.
• one of the pairs of discs. 71 will be provided with a graduated scale 73 giving visual indication of the angle assumed by the work table 5 in relation to either a horizontal or a vertical reference plane.
• Rotating the work table 5 serves to bring the valve seats 52 in the head 50 into axial alignment with the vertical shaft 4, the bottom end of which is fitted with a plunger 19 (fig 2); the shaft can then be lowered and located in each seat 52 in turn so as to compress the valve springs and thus render the removal operation simple and effortless (fig 1) .
• the shaft 4 is brought into vertical alignment with the single seats 52 by way of the traversing means 2, which can be moved through a single horizontal plane such that the axial feed mechanism 3 operating the shaft 4 occupies any given position internally of the framework 1 while remaining disposed at right angles to the traversing plane (figs 1 and 2) .
• the traversing means 2 consist in a flat body 20 the two opposite parallel ends of which afford sliding means (not i llustrated for simplicity's sake) permanently engaged in and running back and forth horizontally between a pair of parallel cross members 21 of the framework 1 that are provided with respective longitudinal tracks 22 to accommodate the sliding means.
• the length of the tracks 22 is such as to enable movement of the feed mechanism 3 across almost the entire corresponding distance encompassed by the framework.
• the flat body 20 in its turn exhibits a substantially rectangular opening 23 the two longer opposite parallel sides of which permanently engage a cross slide 24 capable of traversing back and forth along the opening 23 on sliding means, similar to those mentioned above, through a horizontal path at right angles to the path traversed by the flat body 20.
• the opening 23 is of length such as to enable movement of the cross slide 24, hence of the axial feed mechanism 3 carried by the cross slide, across almost the entire correspond ng distance encompassed by the framework 1.
• the axial feed mechanism 3 that operates the shaft 4 wi ll be seen to consist in an internally threaded support 25 integral with the cross slide 24 and mating with a continuous thread 26 occupying almost the total length of the vertical shaft 4, and a hand operated control, embodied as a handwheel 27 in figs 1 and 2 which, when rotated, turns the shaft 4 in the cross slide 24 and thus permits of raising and lowering it in axial alignment with the seats 52 in the head 50 below.
• the shaft 4 must, shift axially, within the confines of the framework 1, between a position in which its bottom end is adjacent to the cross slide 24, and a position in which the same end can be inserted and pressed into the seats 52; such a faci lity might also be achieved with means other than the simple feed mechanism i llustrated, for example hydraulic, pneumatic or electric.
• the rai l 8 is rotated in its bearers 11, which are also adjustable inasmuch as the length projecting from the work table 5 can be increased or shortened; more exactly, two or more holes 31 are provided at each end of the table 5, aligned with a respective longitudinal slot 32 in the bearer 11 beneath, in which two or more conventional fasteners 28 such as screws or bolts can be located and tightened, having selected the position of the bearers 11 in relation to the table 5 (fig 1) .
• the ends of the rai l 8 are carried by the respective bearers 11 via rotating and fastening means 10 consisting in bearings that ensheath journal bosses offered by the rai l ends, and wrench or lever operated means 29 (fig 4) that lock the bosses into whatever angular position is produced by rotation of the rai l 8.
• Fig 4 i l lustrates a succession of just three amongst the many possible positions that a cylinder head 50 may assume by virtue of the rigid connection created with the rai l 8 using two arms 12, and of subsequent rotation of the rai l about its axis 9; it wi ll be appreciated from the i llustrations how engineering work, repairs and servicing operations are rendered simple and effortless by the extreme versati lity of equipment according to the invention.
• the rai l 8 in a preferred embodiment wi ll be provided along its length either with a continuous through slot, or with a plurality of such slots 30 arranged in regular succession, designed to receive the fasteners 18 of the hinged arms 12 in whichever positions match those of the spark plug or injector seats 51 in the cylinder head 50 (fig 3) .

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Cylinder Crankcases Of Internal Combustion Engines (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=11264283

Family Applications (1)

Country Status (4)

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Family Cites Families (5)

• 1986
  • 1986-05-26 IT IT48062/86A patent/IT1191923B/it active
• 1987
  • 1987-05-21 EP EP87903395A patent/EP0275265B1/de not_active Expired
  • 1987-05-21 WO PCT/IT1987/000049 patent/WO1987007198A1/en not_active Ceased
  • 1987-05-21 AU AU74351/87A patent/AU7435187A/en not_active Abandoned

Non-Patent Citations (1)

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