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
  • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
  • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
  • F16H63/30—Constructional features of the final output mechanisms
• • 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
  • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
  • F16H61/24—Providing feel, e.g. to enable selection
  • F16H2061/243—Cams or detent arrays for guiding and providing feel
• • 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
  • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
  • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
  • F16H63/30—Constructional features of the final output mechanisms
  • F16H2063/3076—Selector shaft assembly, e.g. supporting, assembly or manufacturing of selector or shift shafts; Special details thereof

Definitions

• the invention relates to a switching device of a motor vehicle change gear with a shift rod, two inner sleeves, which are firmly connected to the shift rod and an outer sleeve, which is connected by both inner sleeves axially and circumferentially fixed to the shift rod.
• the invention further relates to a method for producing such a switching device. Background of the invention
• Shift rods as part of shift devices are movable shift elements in the shift transmission, which transmit a switching movement initiated by the driver or an actuator to further downstream shift elements.
• a sleeve on which further functional components such as Rastierkonturen, shift fingers or attacks are arranged net.
• These further functional parts then do not need to be arranged directly on the relatively small, generally curved surface of the shift rod, but instead can be arranged on the sleeve, such as, for example, DE 10 2012 209 025 A1 or DE 10 2011 004 415 A1. Due to the larger mantle surface, more and more complex functional components can be arranged, and if necessary, it is not necessary to machine the switching rod, which is complicated and weakens it.
• the Rastierhülse has a connection to the switching shaft betechnikstelligende inner sleeve, a cup portion and the radial distance between the cup portion and the inner sleeve bridging disc.
• the cup part is formed from two half shells in order to also mold complicated structures into the lateral surface and to be able to produce the cup part more easily.
• a similar Rastierhülse shows DE 198 32 786 A1.
• the support can be made via a plurality of inner sleeves.
• the shift rod is designed as a hollow shaft, so that the shift rod itself forms the sleeve.
• a second inner sleeve may be provided which, as in DE 10 2011 089 052 A1, is normally spaced from the outer sleeve and prevents bending when overloaded.
• the maximum torque that can be transmitted is not increased by the overload protection.
• DE 10 2013 221 356 A1 shows an outer sleeve on two inner sleeves, wherein the outer sleeve firmly connected to the one inner sleeve and the other has a rotational play in order to prevent the transmission of unwanted vibrations.
• the support during shifting takes place essentially on a sleeve.
• Rastierhülsen can either transmit only limited switching forces or all parts must be heat treated, which is complex and takes up much space in the curing oven. This reduces the throughput and the production is expensive.
• DE 100 07 190 A1 it is known from DE 100 07 190 A1 to harden only one insert part and to connect this with the sleeve. However, this requires an additional component, and other highly stressed areas, such as the shift finger and the area surrounding it, may need to be additionally heat-treated.
• the object of the invention is therefore to provide a switching device of a vehicle change gear, which avoids the disadvantages mentioned above. It is to be created a switching device that allows the transmission of high switching forces in the field of stress of the manufacturing and lightweight construction. It is another object of the invention to provide a manufacturing method for such a switching device.
• a switching device according to claim 1 and a method according to claim 10. Because the outer sleeve can be permanently supported on the shift rod via a plurality of inner sleeves, the shift device has a good force discharge from the outer sleeve to the shift rod, so that forces introduced via the shift finger or the shift fingers are well supported. The shifting forces can thus be transmitted to the shift rod via both inner sleeves during the shift. Furthermore, the arrangement of two axially mutually adjacent inner sleeves allows a good positioning of the outer sleeve to the shift rod. Under a shift rod is understood to be any elongated switching element. It can be made of solid material or weight saving as a hollow body. Their cross-sectional area can be circular-cylindrical, so that the lateral surface can be used as an inner ring of a bearing. Alternatively, their cross-section is not circular, but, for example, rectangular as in Heidelbergschie- trained.
• the shift rod is axially and / or circumferentially movably mounted in a Getriebeschaltein- direction. If the shift rod is axially fixed, the components arranged on it are generally arranged to be axially movable. Alternatively, the shift rod is movable in the circumferential direction about its main axis as a shift shaft.
• a switching rod designed as a central selector shaft is both rotatable and axially displaceable.
• the inner sleeves enclose the shift rod at least partially.
• they usually have an inner circumferential surface which is complementary to the shift rod contour, in a preferred embodiment the inner sleeves completely surround the shift rod in the circumferential direction, so that they can be subjected to high forces without deforming.
• the inner sleeves usually have an annular flange whose width corresponds to the difference in diameter of the outer and inner sleeves.
• the inner sleeves are firmly connected to the shift rod, whereby they are thus arranged both axially fixed and non-rotatable. For this they are, for example, welded or frictionally held on the shift rod. Especially with non-round shift rods and form-locking fuses are possible.
• the inner sleeves may for example be pressed, shrunk, caulked or embossed on the shift rod.
• At least two inner sleeves are provided to support the outer sleeve on the shift rod.
• the outer sleeve should have a plurality of shift fingers, it is advantageous if each of the shift fingers is flanked axially by inner sleeves.
• those inner sleeves, which are arranged between other inner sleeves can be provided for supporting different functional elements.
• three inner sleeves can be sufficient without the transmittable forces and moments sinking appreciably. It can also be provided to provide more than two inner sleeves for fastening the outer sleeve even with only one shift finger.
• the inner sleeves include all functional elements axially. It is particularly advantageous, however, if the axial distance between the shift finger and the point of force application to the inner sleeves is as low as possible, so that the lever arm is short.
• the inner sleeves may be formed as flange sleeves, which are arranged transversely, so that their flanges are directed towards each other and axially flank the shift finger.
• an arrangement in the same direction may also be advantageous, for example in order to save axial space
• the inner sleeves have a flange whose end face corresponds to the enclosed cross-section of the outer sleeve, so that it can support it over as large a line contact as possible while at the same time taking up little installation space.
• the outer sleeve can completely surround the shift rod in the circumferential direction.
• Such an outer sleeve is stable, can be produced in one piece and is resistant to abuse forces.
• the outer sleeve encloses the shift rod in the circumferential direction only partially.
• it can have as a half shell a U-shaped contour with two legs. This last-mentioned variant requires less material and is usually lighter than a completely enclosing outer sleeve.
• One or more connecting parts can stiffen the half-shell by connecting both legs and enclosing the switching rod on an axial section of the half-shell.
• the connecting parts can also form a sleeve which is open on the rear side with the half shell by being arranged on the front side and forming a cover on one or both sides. Then they usually have fürgangsaus- recesses for the shift rod or their storage.
• one or more stiffening elements can be provided.
• the outer sleeve can be made in one piece or be provided in turn with one or more separately produced functional elements.
• a functional element can be formed for example by a Rastierkontur.
• the Rastierkontur is a resting mountains, which leads and secures against them from the outside prestressable locking element.
• Rastierkontur provides a predetermined switching force or Wählkraftverlauf and must therefore be accurately posi- tioned and manufactured. It is particularly easy to insert into a separate sheet metal forming technically, which can be dispensed with molding in the half shell.
• the outer sleeve usually has several functional elements.
• the outer sleeve according to the invention has a shift finger.
• the shift finger is intended for engagement in a shift jaw to move other switching elements. The introduction of force into the switching device therefore takes place via the shift finger.
• the shift finger is arranged axially between two inner sleeves. As a result, the forces acting on the shift finger forces are supported evenly, so that the components deform less.
• two inner sleeves have annular flanges which support the outer sleeve directly on the shift finger.
• the outer sleeve may have through holes, engage in the radial projections of the flanges. By permanently deforming the radial projections, it is possible to fasten the outer sleeve to the inner sleeve.
• the inner sleeves are uncured. The force discharge via at least two spaced apart inner sleeves gives the switching device a sufficiently good strength, so that can be dispensed with a hardening of the inner sleeves.
• the outer sleeve is made in several parts. Can do this
• a complete hardening of the unit thus produced takes place.
• the unit can be firmly connected to the uncured inner sleeves. This can be done for example by Vertaumeln or riveting.
• a Rastierkontur can be welded to the sleeve and arranged on the shift rod. It is also called Rastierhülse.
• the sheet with the Rastierkontur the additional function of stabilizing the half shell. By fastening it to the half shell, it thus additionally stiffens it.
• the outer sleeve is particularly easy to produce from a flat material such as a cut to length sheet metal strip.
• the flat material is first provided with the appropriate shapes and the cutouts for the locking stops and the switch finger before bending. Then the sheet metal strip is bent semicircle into a half-shell, and at its ends the connecting parts are fastened in a form-fitting, non-positive or materially stabilizing manner.
• a shift finger is finally placed on the outer sleeve and secured thereto by riveting and / or welding.
• a second locking contour can be provided so that the selection and switching operation are effected by separate locking contours. The contours can also overlap, for example, to enable detection of the switching position.
• the inner sleeves can be made by deep drawing, extrusion.
• the inner sleeves may be connected to the shift rod by a press fit. If the switching rod has recesses such as annular grooves, the inner sleeves can also be embossed, for example.
• Figure 1 shows a switching device according to the invention in a perspective
• FIG 2 shows the switching device of Figure 1 in rotated and pivoted, back
• Figure 3 shows the switching device of Figure 1 in a plan view
• Figure 4 shows the switching device of Figure 3 in longitudinal section. Detailed description of the drawings
• Figures 1 to 4 show a switching device 1 of a manual manual transmission of a motor vehicle.
• the solid switching rod 2 which has a round cross-section, is surrounded by an outer sleeve 3, which is produced from a strip material and is connected to the switching rod 2 via a first inner sleeve 4 and a second inner sleeve 9.
• the outer sleeve 3 is composed of a half-shell 7 and a connecting part 8.
• the half-shell 4 is made of a piece of sheet steel cut to length from the strip material.
• the desired outer contour with optionally required studs 16 or other projecting elements can be punched into the sheet immediately after being cut to length. Alternatively, a corresponding piece of sheet metal is punched out of the strip material.
• the outer contour of the half-shell 4 is U-shaped with two legs 5 and 6, which are directed parallel to each other. Approximately in the middle between the legs 5, 6 a shift finger 13 is arranged, which actuates not shown shift mouths. On the rear side, the two legs 5, 6 of the half-shell 4 are connected to one another by the first connecting part 8 designed as a locking contour 10.
• the connecting part 8 is arranged axially on the end of the half-shell 4 and has an axial length of less than a quarter of the total length of the half-shell 4. It stabilizes the open, U-shaped sleeve. It is lighter compared to a cylindrical sleeve.
• the Rastierkontur 10 is made of a formed sheet, which differs in material quality and thickness of the sheet metal strip of the half-shell 4.
• the sheet metal is a resting mountains shaped.
• the leg connection surfaces 14 are each provided with two recesses 15 into which the nubs 16 of the half shell 4, which are formed as leg extensions, engage.
• the knobs 16 are stamped in the recesses 15.
• the half-shell 4 and the connecting part 8 together surround the switching rod 2 annular. Welding of the connecting part 8 with the half-shell 4 is thereby unnecessary.
• the shift device 1 has the two inner sleeves 4, 9 produced in one piece.
• the inner sleeves 4, 9 may be deep-drawn or extruded, for example.
• they In addition to their collar 17 surrounding the shift rod 2 as a sleeve section, they each have a radially directed flange 18 at the end.
• the flange 18 is an annular flange provided with projections 12, the projections 12 of which point radially here and protrude into corresponding engagement recesses of the outer sleeve 3 and are secured there, for example by caulking.
• the inner sleeves 4, 9 are in turn secured via their collar 17 with stampings 19 in the form of double embossing in Wegstangenaus traditions 20 axially and circumferentially. Not shown is a variant in which the inner sleeves 4, 9 are secured by means of press fit.
• the embodiment of the outer sleeve 3 has immersion openings 21, into which the switch mouths of the shift forks, which are pivoted by the shift fingers 13, can dip in order to obtain the most space-saving possible construction of the shift device 1 and the shift forks.
• the window-like immersion openings 21 can be large because the switching forces are securely supported by both inner sleeves.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Gear-Shifting Mechanisms (AREA)

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Citations (12)

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• 2016
  • 2016-09-15 DE DE102016217578.5A patent/DE102016217578A1/de not_active Withdrawn
  • 2016-09-15 CN CN201680051770.6A patent/CN108027061A/zh active Pending
  • 2016-09-15 WO PCT/DE2016/200431 patent/WO2017045685A1/de active Application Filing

Patent Citations (12)

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