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
  • F16H—GEARING
  • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
  • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
  • F16H25/186—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions with reciprocation along the axis of oscillation
• • 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
  • B25B5/00—Clamps
  • B25B5/06—Arrangements for positively actuating jaws
  • B25B5/061—Arrangements for positively actuating jaws with fluid drive
  • B25B5/062—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis parallel to the pressing direction

Definitions

• the invention relates to a transmission gear for converting movement from a drive movement into an output movement, in particular in a swivel device (e.g. swivel clamp for clamping components or hydraulic swivel motor).
• a swivel device e.g. swivel clamp for clamping components or hydraulic swivel motor.
• a conventional swing clamp is known from EP 1 264659 B1 and DE 102 52 549 A1, which is used, for example, to clamp workpieces on machine tables.
• a Spannei sen is pivotable and axially displaceable, the movement of the clamping iron being driven by a piston which, actuated by pressure medium, is axially displaceable in a working cylinder of the swing clamp.
• a transmission gear is arranged between the displaceable piston and the displaceable and schwenkba Ren clamping iron, which converts the purely axial movement of the piston into the combined pivoting and axial movement of the clamping iron.
• the known swing clamps have seals that prevent media (e.g. hydraulic oil) from penetrating in the axial direction along the link guide. These seals are arranged axially above and below the link guide, whereby the axial height of the conventional swing clamp is increased, since the seals above and below the link guide require construction space.
• the disadvantage of the known swing clamp is the fact that the lines require additional installation space and thereby increase the axial height of the swing clamp.
• a transmission gear for a parking brake of a motor vehicle is known from DE 102012012423 A1.
• this known transmission gear is not suitable for a Schwenkspan ner or a hydraulic swing motor.
• the general technical background of the invention also includes the publications DE 10 2012 000392 A1, DE 102017 221512 A1, DE 27 57507 A1 and DE 41 14 295 A1.
• the invention is therefore based on the object of creating a way of reducing the overall axial height of a swing clamp. This object is achieved by an inventive transmission gear according to the main claim.
• the transmission gear according to the invention has, in accordance with the prior art, a movable drive member which performs the drive movement during operation.
• the drive member is preferably a piston which is axially displaceable by means of pressure medium, the piston being driven, for example, pneumatically or hydraulically.
• the transmission gear according to the invention in accordance with the prior art, has a movable output member that performs the output movement during operation.
• a swing clamp is preferably a rod that carries the clamping iron, the rod being both axially displaceable and pivotable.
• the transmission gear according to the invention also has a cam gear which converts the drive movement of the drive element (e.g. piston) into the output movement of the output element (e.g. rod) according to a predetermined transmission curve.
• the drive element e.g. piston
• the output element e.g. rod
• one of these movements of the drive movement and the output movement is an axial movement along a given movement axis or at least contains a translational movement component along the movement axis, while the other movement is a rotational movement around the movement axis or contains at least one rotational movement component .
• the drive movement is a pure axial movement without a rotational movement component, while the output movement is a combined rotational and axial movement.
• the cam mechanism has no link guide, as is the case with EP 1 264 659 B1. Rather, the cam gear in the transmission gear according to the invention has two contact surfaces which slide flat on one another and thereby effect the conversion of movement.
• the contact surfaces sliding on one another are therefore preferably free-form surfaces which preferably run along a helical line.
• the free-form surfaces are preferably not circular in a cross section at right angles to the movement axis.
• the contact surfaces can be elliptical in cross section at right angles to the axis of movement.
• the output movement of the output member e.g. swivel iron
• the output member can be a combined rotational and axial movement.
• the transmission gear can have an axial lock that prevents axial movement of the output member (e.g. swivel iron) along the axis of movement in the initial phase of the movement and releases the axial movement of the output member in the end phase.
• the axial lock can have an elliptical disk for this purpose, which is connected to the output member in a rotationally rigid manner or is integrally formed on the output member. The elliptical disk can then only be displaced axially ver in a certain rotational position in an elliptical bore, whereas the elliptical disk otherwise blocks axial displacement.
• the piston has a continuous axial bore, a rod being passed through the axial bore in the piston.
• the outer circumferential surface of the rod on the one hand and the inner surface of the axial bore in the piston on the other hand form the sliding contact surfaces for the movement conversion.
• the drive member is preferably mounted so that it cannot rotate, so that the drive member cannot rotate about the axis of movement.
• the drive member is preferably axially displaceable so that the drive member can move axially along the axis of movement.
• the drive member preferably surrounds the driven member in an annular manner.
• the output member it is also possible for the output member to surround the drive member in an annular manner.
• the above parts of the description preferably relate to the use of the transmission gear according to the invention in a swing clamp.
• the transmission gear according to the invention is therefore suitable for various transformations of motion, which are briefly described below.
• the drive movement of the drive member is a pure axial movement without a rotational movement component
• the Abtriebsbewe movement of the output member is a pure rotational movement without a translational movement component.
• the drive member is preferably secured against rotation about the axis of movement, so that the drive member cannot perform any rotational movement, but only an axial movement along the axis of movement.
• the output member is preferably secured against displacement along the axis of movement in this inven tion variant, see above that the output member cannot perform any axial movement along the axis of movement, but only a rotational movement about the axis of movement.
• the drive member is preferably a rod which is surrounded by a piston as an output member.
• the contact surfaces for the movement conversion are preferably located in the outer surface of the rod, on the one hand, in the through-hole of the piston, on the other hand.
• the drive movement of the drive member is also a pure axial movement without a rotational movement component, while the output movement of the output member is a pure rotational movement without a translatory movement component.
• This variant of the invention thus partially corresponds to the first variant of the invention described above.
• the piston and rod are interchanged, i.e. the drive element is a piston while the output element is a rod.
• the drive movement of the drive member is a pure rotational movement without a translational movement component, while the output movement of the output member is a pure axial movement without a rotational movement component.
• the drive member is preferably secured against displacement along the axis of movement, so that the drive member cannot perform any axial movement, but only a rotational movement about the axis of movement.
• the output member is secured against rotation about the axis of movement, so that the output member cannot perform any rotational movement, but only an axial movement along the axis of movement.
• the drive member is a rod, while the output member is a piston.
• a pure Rotationsbewe supply is also converted into a pure axial movement, as described above.
• the drive member is a piston
• the output member is a rod.
• FIG. 13 - Another variant of the invention - see also FIG. 13 - provides that the drive movement of the drive member is a pure rotational movement without a translational movement component, while the output movement of the output member is a combined axial and rotational movement.
• the drive member and output member are identical and are gebil det from a rod which is surrounded by a piston. A rotation of the rod leads to a combination of rotation and axial displacement of the rod. The piston is therefore secured against rotation as well as against displacement in this inven tion variant and thus fixed within the transmission.
• FIG. 14 - provides, however, that a pure Axialbewe supply without a rotational movement component is converted into a combined Axial- and Rotationsbe movement.
• the drive member and output member are identical and who are formed by a rod which is surrounded by a piston. The piston is in this case also arranged stationary within the transmission gear and thus secured against both displacement and rotation.
• FIG. 15 - Another variant of the invention - see also FIG. 15 - provides that a combined axial and rotational movement is converted into a combined axial and rotational movement.
• the drive member and the output member are identical and are formed by a rod which is surrounded by a piston, the piston in turn being arranged in a stationary manner within the transmission gear, i.e. the piston is secured against axial displacement and rotation.
• the drive movement of the drive member is a pure rotational movement, while the output movement of the output member is a combined axial and rotational movement.
• the drive member and the output member are identical and are formed by a piston that surrounds a rod. The rod is fixed in place in the transmission gear, i.e. the rod is secured against axial displacement and rotation.
• FIG. 17 - Another variant of the invention - see also FIG. 17 - provides that there is a purely axial movement on the drive side, while a combined axial and rotational movement is generated on the output side.
• the drive element and the output element are identical and are formed by a piston which surrounds a rod, the rod being secured against both axial displacement and rotation.
• the drive element and the output element are again identical and are formed by a piston which surrounds a rod, the rod being secured against displacement and rotation.
• the contact surfaces (free-form surfaces) of the cam mechanism are located on the one hand in the outer circumferential surface of the rod and on the other hand in the inner surface of the piston.
• the above description relates generally to an inventive transmission gear regardless of the area of use.
• the invention also claims protection for a swing clamp with such a transmission gear, the clamping arm of the swing clamp is moved by the output member of the transmission gear, while the drive member is a piston which is actuated by pressure medium in a working cylinder.
• the invention also claims protection for a hydraulic swivel motor with the transmission gear according to the invention.
• the transmission gear according to the invention is therefore generally suitable for use in a swivel device (e.g. swivel motor, swivel clamp).
• Figures 1A-7A show different views of a swing clamp according to the invention in a relaxed position.
• Figures 1B-17B show the corresponding views in a pivoted position of the swing clamp.
• Figures 1C-7C show the corresponding views of the swing clamp in a tensioned position.
• Figures 1D-7D show the corresponding views of the swing clamp in a Wegspann th position.
• FIG. 8 shows a table with a list of the various possible movement conversions.
• FIGS. 9-18 show a schematic representation to clarify the various possible transformations of movement from the table in FIG. 8.
• the preferred embodiment of a swing clamp 1 according to the invention will now be described, as shown in Figures 1A-7A, 1B-7B, 1C-7C and 1D-7D.
• the relevant prior art to avoid repetitions, as is known, for example, from EP 1 264659 B1 and DE 102 52 549 A1.
• EP 1 264659 B1 and DE 102 52 549 A1 As is known, for example, from EP 1 264659 B1 and DE 102 52 549 A1.
• only a few details of the swing clamp 1 according to the invention that are essential to the invention are described.
• the swing clamp 1 initially has a housing 2, which is closed by a housing cover 3 on its upper side.
• a swivel piston 4 which has a swivel arm, runs through a bore in the housing cover 3
• the swivel piston 4 is displaceable with the swivel arm 5 and the clamping iron 6 in the vertical direction and can be swiveled about a vertical swivel axis, as is known per se from the prior art and will be described in detail below. At this point it should only be mentioned that the swivel piston 4 with the clamping iron
• an adjusting sleeve 7 is arranged below, which has an elliptical inner cross-section and forms a working cylinder 8 with an elliptical cross-section.
• a piston 9 is axially displaceable in the working cylinder 8, the piston 9 likewise having an elliptical cross section.
• the piston 9 can thus be displaced axially in the working cylinder 8, i.e. in the vertical direction, whereas a rotation of the piston 9 in the working cylinder 8 is not possible.
• the piston here forms a drive member within the meaning of the invention.
• An elliptical disk 13 is formed on the pivot piston 4 and forms an axial lock.
• the elliptical disk 13 rests on the upper side of the adjusting bush 7, so that the pivot piston 4 with the elliptical disk 13 cannot be moved axially downward.
• the piston 9 is moved axially downward in the working cylinder 8, the piston 9 being secured against twisting due to the elliptical cross-sections of the working cylinder 8 and the piston 9.
• the elliptical disk 13 of the swivel piston 4 rests on the upper side of the adjusting bush 7 and thereby prevents an axial displacement of the swivel piston 4.
• FIG. 8 shows a table with various possible configurations for the movement conversion from the drive element to the output element, regardless of the specific area of application in the swing clamp 1.
• Figures 9-18 show simple, schematic representations of the gear construction for converting motion between a rod S and a piston K, the rod S having a free-form surface in its lateral surface which cooperates with a corresponding free-form surface in the through-hole of the piston K.
• the two corresponding free-form surfaces here run along a helical line, as is only shown schematically.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Transmission Devices (AREA)
• Actuator (AREA)
• Jigs For Machine Tools (AREA)
• Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=76730504

Family Applications (1)

Country Status (7)

Families Citing this family (1)

Family Cites Families (11)

• 2020
  • 2020-06-16 DE DE102020115803.3A patent/DE102020115803B4/de active Active
• 2021
  • 2021-06-16 EP EP21736527.9A patent/EP4164839A1/de active Pending
  • 2021-06-16 WO PCT/EP2021/066171 patent/WO2021255060A1/de unknown
  • 2021-06-16 US US18/010,651 patent/US20230256568A1/en active Pending
  • 2021-06-16 CN CN202180043354.2A patent/CN115697635A/zh active Pending
  • 2021-06-16 JP JP2022577101A patent/JP2023530129A/ja active Pending
  • 2021-06-16 KR KR1020227043199A patent/KR20230022173A/ko unknown

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