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
  • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
  • F16G5/00—V-belts, i.e. belts of tapered cross-section
  • F16G5/16—V-belts, i.e. belts of tapered cross-section consisting of several parts
  • F16G5/18—V-belts, i.e. belts of tapered cross-section consisting of several parts in the form of links
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21L—MAKING METAL CHAINS
  • B21L9/00—Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains
  • B21L9/02—Making chains or chain links, the links being composed of two or more different parts, e.g. drive chains of roller-chain or other plate-link type
  • B21L9/04—Punching or bending the different parts of the chain links

Definitions

• the invention relates to a stamped part for further processing into a tab for a La shenkette of a transmission, this stamped part is created by means of a several steps to comprehensive stamping process and has at its outer circumference at least one connection structure via which the stamped part to the rest of the flat
• Base material from which it is punched out is temporarily bound, the outer circumference being formed by two long sides and two high sides of the punched part.
• the invention further relates to a method for the production of a bracket for a chain, with a stamping process comprising several steps being used to create a stamped part that has at least one connection structure on its outer circumference, which is formed by the long sides and high sides of the stamped part the stamped part is temporarily connected to the rest of the flat base material from which it is stamped.
• the brackets are then used together with rocker pressure pieces to create belts for gears.
• Such belts with egg ner arrangement of tabs and rocker pressure pieces are generally known as Laschenket th (short: chains).
• Laschenket th short: chains
• the aforementioned transmission is usually a continuously variable transmission, which is generally also referred to as a CVT transmission (CVT: Continuously Variable Transmission).
• CVT transmission Continuously Variable Transmission
• NVH Noise Vibration Harshness
• the punched part according to the invention for further processing into a plate for a link chain of a transmission, which is created by means of a several steps comprising the punching process and whose outer circumference has at least one connection structure, via which the punched part to the rest of the flat base material from which it is punched out, is temporarily connected, this outer circumference being formed by two long sides and two high sides of the punched part, it is provided that the connection structure or at least one of the connection structures is formed on one of the long sides of the punched part.
• connection structures By positioning at least part of the connection structures on the one longitudinal side of the stamped part for the tab, the freedom of design of the tab geometry increases significantly, so that the geometry can be adapted to the desired pitch T der- art can be adjusted to achieve the desired strength.
• guide length for the slide rail can be increased.
• the guide of the slide rail preferably coincides with the connection structure on at least one longitudinal side
• At least one of the longitudinal sides is longer than each of the individual high sides.
• the longitudinal sides are aligned in the link chain or the looping means in their longitudinal or running direction.
• one of the two long sides is shorter than the other long side, with the at least one connection structure being formed on this shorter long side.
• connection structures are formed on the said longitudinal side of the stamped part.
• these are two connection structures that are clearly spaced apart from one another on the said longitudinal side of the stamped part.
• the at least one connection structure formed on said longitudinal side of the stamped part is arranged in an area of the outer circumference that serves as a guide area for a slide rail at the link plate of the link chain.
• one or more openings are formed in the stamped part, through which cradle pressure pieces of the link chain can reach.
• At least one of the two longitudinal sides for receiving a casing area of at least one shaft of the transmission is concave in a central area.
• a stamped part is created by means of a stamping process comprising several steps, which has at least one connection structure on its outer circumference, which is formed by the long sides and high sides of the stamped part, via which the The punched part is temporarily connected to the rest of the flat base material from which it is punched out, it is provided that the connection structure or at least one of the connection structures is formed on one of the long sides of the punched part and the punched part is then processed into a tab by means of at least one further processing step becomes.
• the features mentioned in connection with the stamped part also apply accordingly to the manufacturing process.
• the stamped part is in particular the stamped part mentioned above.
• connection of the stamped part via the at least one connection structure to the rest of the flat base material is released by means of a shear cutting process or another separation process.
• the further processing step or at least one of the further processing steps is a machining step.
• the step is, for example, a grinding step.
• Fig. 1 an arrangement of a plate and two pressure pieces for a looping means designed as a plate chain of a CVT transmission
• 2 shows a section of a looping means designed as a link chain
• Fig. 3 a CVT transmission with a belt formed as a link chain means.
• Fig. 1 shows a tab 10 and two rocker pressure pieces 12 for a Umschlin supply means of a continuously variable transmission (CVT transmission: Continuously Va riable Transmission). Such transmissions are used in particular in the drive train of motor vehicles.
• a link chain 11, which is shown in FIG. 2, can be created from such link plates 10 and rocker pressure pieces 12.
• the tab 10 is created by means of a punching process comprising several steps, in which a punched part 14 for further processing into the tab 10 is produced as an intermediate product or semi-finished product.
• the punched part 14 already has the basic shape of the tab 10.
• the terms tab 10 and punched part 14 are therefore used synonymously in the following with regard to their geometry.
• the link chain 1 1 consists essentially of the link plates 10 and the cradle pressure pieces 12 (abbreviated to WDS).
• Each of the tabs 10 has a frame-like shape, which - based on the direction of travel (double arrow 16) of the looping means - comprises a longitudinal element on each of the two longitudinal sides 18, 20 and a height element on each of the two high sides 22, 24, so that it can Breakthrough 26 updated opening in the center of the respective tab 10 frame. Due to the arrangement of the longitudinal and height elements 18, 20, 22, 24, the respective tab 10 has roughly the shape of an isosceles trapezoid with a corresponding outer circumference 28 which is axially symmetrical with respect to an (imaginary) central axis 30. In the case of the link chain, the rocker pressure pieces 12 now engage in pairs in these openings 26 of the plates 10 to form a rocker pressure piece pair serving as a joint.
• a rocker pressure piece 12 of each of the rocker pressure piece pairs is Darge provides, while the other rocker pressure piece of the respective rocker pressure piece pair is not shown.
• the order of the loading Repeat the 10 crosswise to the direction of travel of the belt, so that a corresponding flap pattern results.
• plate link chains there are sometimes plates 10 of different plate types.
• the different tab types also differ in terms of different tab lengths.
• the joint formed from two rocker pressure pieces 12 of a rocker pressure piece pair is often referred to as a rocker joint.
• a punched part 14 is created as an intermediate product, which is further processed into the corresponding tab 10 by at least one further processing step.
• This stamped part 14 has at least one point in time of the stamping process comprising several steps for its production on its outer circumference 26 several connection structures 32, 34, 36, 38 via which the stamped part 14 is attached to the rest of the sheet metal from which it is otherwise stamped , until the end of the punching process, in which it is separated from the rest of the sheet with a shear.
• These connection structures 32, 34, 36, 38 are also referred to as punched connections. Two of these connection structures 36, 38 are formed on the shorter of the two longitudinal sides 20 of the stamped part 14 and the other two connection structures 32, 34 are each located in a transition area between the longer of the two longitudinal sides 18 and one of the high sides 22, 24.
• connection structures 36, 38 can now be positioned in areas which, in the case of the link 10 of the link chain, serve as guide areas 40, 42 for a slide rail.
• connection structures (punched connections) 36, 38 By positioning the connection structures (punched connections) 36, 38 in the - here shorter - longitudinal side 20, the freedom of design of the geometry of the tab 10 increases significantly and the strength can be increased. In addition, the guide length for the slide rail can be increased. The guidance of the slide rail on the longitudinal side 20 coincides with the connection structures (punched connections) 36, 38.
• Another guide area 44 is located centrally on the other longitudinal side 18.
• the longitudinal side 20 for receiving a jacket area of at least one shaft of the gear
• the drive is concave. In this way, small circumferential radii can also be implemented.
• FIG. 2 shows part of a link chain 11 forming the looping means.
• the arrangement consists of parallel to the running direction of the looping means on ordered tabs 10 and transversely to the running direction of the looping means directed rocker pressure pieces 12, the cradle pressure piece pairs 56 serving as joints to form cradle pressure piece pairs engage in the openings 24.
• the two rocker pressure pieces 12 of each rocker pressure piece pair 56 have sides facing each other with rocking surfaces on which they roll against each other or on which they can slide against each other, so that the tabs 10 are articulated to each other by means of the pressure pieces 12 formed in this way with respect to a respective joint axis are.
• two pairs of rocker pressure pieces 56 each engage in the respective opening 26 of a bracket 10.
• the pressure pieces 12 protrude with end sections from the arrangement of the tabs 10. Securing elements such as, for example, locking pins can then be provided on these end pieces (not shown).
• a corresponding continuously variable transmission 58 is shown in FIG. 3. It comprises a transmission input side 60 and a transmission output side 62, each of which has a shaft 64, 66 and a pair of conical pulleys 68, 70 arranged on the respective shaft, as well as the aforementioned belt means made up of plates 10 and pressure pieces 12 in the form of the plate chain 11, is arranged in the torque flow between the two pairs of conical disks 68, 70.
• the continuously adjustable transmission 58 shown here is therefore also referred to as a conical pulley belt transmission.
• the belt is designed to transmit forces and torques in the conical pulley belt transmission, such a conical disk belt transmission being arranged, for example, in the drive train of a motor vehicle between a drive machine and the driven axle.
• the continuously adjustable transmission 58 adapts the transmission ratio to the respective driving conditions and operating conditions of the prime mover or to the demands of the driver on the prime mover, for example due to an accelerator pedal actuation.
• the belt connects the two pairs of conical disks 68, 70 or sets of conical disks in the power flow or torque flow within the conical pulley belt drive, whereby a gear ratio change can be implemented and controlled in a targeted manner by varying the running radius of the belt in relation to the axis of the respective conical pulley pair 68, 70. This can be controlled in a targeted manner by means of a control unit.
• One pair of conical disks 68 of the gearbox is connected or can be connected to at least one transmission input shaft 64 and the other pair of conical disks 70 is connected or can be connected to an output shaft 66 of the transmission 58.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Transmissions By Endless Flexible Members (AREA)
• Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

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• 2019
  • 2019-06-04 DE DE102019114950.9A patent/DE102019114950B4/de active Active
• 2020
  • 2020-05-06 WO PCT/DE2020/100374 patent/WO2020244701A1/de active Application Filing
  • 2020-05-06 CN CN202080036318.9A patent/CN113825927B/zh active Active

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