• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The transmission wheel block (1) having a radius (R) on its inner arcuate surface (3) and a profile on its outer surface (8), the transmission wheel blocks (1) being less than two ends (4) X / 2) at least 0.2 mm. Preferably, the outermost edge (4) of the end face (4) and / or the flank-side edges are bevelled in half (5, 8) of the welding slot. Preferably, the inner surface of the end face (4) of the power take-off block has a projection (6) or a notch (7) such that said projection fits (6) thereto when mounted on the shaft of the power take-off blocks (1) (X / 2) and the drive wheel block (1) has either one of said projections (6) and one of said notches (7) or either two projections (6) or two notches (7). The invention also relates to a drive wheel and a method for mounting the drive wheel blocks on a shaft (12), wherein the tensioning means (11) are used to tighten the drive wheel blocks on the shaft and weld their ends together.
    公开号:FI20185393A1
    申请号:FI20185393
    申请日:2018-04-27
    公开日:2019-10-28
    发明作者:Pekka Kaarakainen；Ari Hannimäki；Mika Vuolle
    申请人:Andritz Oy；
    IPC主号:
    专利说明:

    TRANSMISSION BLOCK, TRANSMISSION WHEEL AND METHOD OF INSTALLING IT
    The present invention relates to transmission wheels, their blocks and to the installation of transmission wheels on a shaft.
    The transmission wheel often has to be added to the shaft during a new installation or replacement of a worn transmission wheel. In this case, the transmission wheel cannot always be fitted in its entirety but must be divided into at least two blocks which are fastened to each other and around the shaft. The bifurcated structure is known, for example, from DE102008046167 and EP0684397, in which, for example, a precision-made transmission wheel is divided by breaking it into two precisely compatible parts and connecting them to the shaft by means of compression joints. DE102008046167 discloses a solution in which the halves of a transmission wheel are connected to each other by an axial compression joint and can be finished, if necessary, by welding the fracture surfaces together. EP0684397 shows how the halves of a transmission wheel are first reconnected at a small diameter point, for example by radial welding from the side, and then mounted on the shaft by means of a temperature difference.
    EP561478 discloses how superimposed plastic transmission wheel halves, which may have shoulders to align the blocks, are screwed together. The publication mentions that joining can also be done by gluing or welding, but not how welding could be done. Plastic pieces facing each other can generally be welded, for example by ultrasonic welding. The transmission from the shaft to the transmission wheel is effected by means of a wedge.
    SUMMARY OF THE INVENTION
    Chains and transmissions such as pulleys, gears and sprockets, especially in very large conveyors in the woodworking industry, are exposed to conditions where they are exposed to the weather and consumables such as sand. During maintenance, the installation of new transmission wheels on the shaft typically has to be done in a situation where the shaft cannot be removed from the device, in which case the transmission wheel must be divided into blocks before installation. The blocks are preferably the same size and them
    20185393 prh 27-04-2018 is preferably 2-4 pieces. The blocked structure should be assembled into a transmission wheel so that the blocks are placed on the shaft without backlash and the fitting is preferably so tight that it transmits the torque to the entire joint. Even in new configurations, it is difficult to provide a sufficiently tight compression fit for several transmission wheels of the same diameter mounted on a long and thick shaft in parallel. The transmission wheels of conveyors in the wood processing industry are typically more than 200 mm in diameter with a shaft diameter and more than 30 mm in thickness in the radial direction.
    It is an object of the present invention to provide a new type of transmission wheel welded together from blocks to a requirement for installation and maintenance, as well as a method of its installation. The invention is defined in the independent claims. Some preferred embodiments of the invention are defined in the dependent claims.
    The transmission wheel usually consists of two blocks. There are other sharing options as well. For example, burning blocks of very large transmission wheels nearly a meter in diameter from a steel plate in three or four parts can save plate material. The transmission wheel blocks are preferably of equal size, but may also consist of larger and smaller sectors if these together form a full transmission wheel. The gap between the ends of the blocks must remain on the shaft when the gap is placed, which shrinks during welding and provides a compression fitting.
    Welding should not damage functional surfaces such as the shaft surface so that a new transmission wheel can be replaced instead if necessary. Arc welding is a particularly advantageous method of joining because the residual stresses in the wide weld shrink the joint and cause a very large tightening force to shrink the gap left in the joint. Making wedge grooves on the shaft and transmission wheel that increase costs and work steps can generally be avoided because the compression fitting can transfer the entire load without the wedge.
    The transmission wheel blocks have substantially the same radius on the inner arcuate surface as the transmission wheel shaft on which the transmission wheel blocks are mounted.
    20185393 prh 27-04-2018
    The outer surfaces of the transmission wheel blocks have profile surfaces to implement the transmission. The outermost edge and / or side surfaces of the end faces are preferably chamfered to form a weld groove for the weld producing a strong compressive effect. The weld does not extend to the shaft, but only deep enough to withstand the loads. It is then advantageous to weld and the weld can be easily sanded open to remove the transmission wheel when it is worn out or damaged. In addition, the disadvantage of a low-strength weld is that only one side of the worn toothed transmission wheel, the welds can be ground open and the pieces can be turned and the joint re-welded, thus providing a usable transmission wheel without replacing parts.
    When mounted on the axle, the end faces must not reach each other when placed on the axle, and there must be no clearance between the axle and the transmission wheel. The shrinkage force caused by welding is prevented if no gap is left between the end faces. Therefore, the transmission wheel blocks must not form complete sectors but must be sufficiently small. By complete sectors is meant herein sectors which form a complete circle and the sectors terminate at half-intervals of opposite end faces. When both end faces of the transmission wheel block are less than or equal to 3 mm of the full sector according to the number of blocks, a gap of not more than about 6 mm is formed between them during installation, which can be considered as the practical maximum. If the gap is too large, the quality of the weld will vary too much, as will the power transmission capacity of the compression fitting. Therefore, the transmission wheel blocks must be at least 0.2 mm short at both ends compared to full sectors. When installed in the gap between the ends of the transmission wheel blocks, a gap of at least about 0.4 mm is then formed, depending on the manufacturing tolerances. The gap typically shrinks by 0.2-0.6 mm due to welding. Of these full sectors, the sectors covered by the transmission wheel blocks are insufficient at their ends, so that there is preferably a gap between the blocks, noticeable even after welding, on those end surfaces which are not welded together. The best result is achieved by minimizing the width of the slits so that the end faces do not stick together, even when welded.
    Preferably, the inner edge of the end faces of the transmission wheel blocks has either a protrusion or a notch corresponding to the protrusion, which protects the shaft from welding splashes and damage and thus facilitates the replacement of the transmission wheel. The protrusion can also act as a weld
    20185393 prh 27-04-2018 as root support, in which case the width of the gap between the ends can be up to 10 mm. The end face of the projection and the bottom of the notch must not overlap during installation so as not to interfere with the shrink fit of the transmission wheel against the shaft. In order for the projection to prevent damage to the shaft, its height must be at least the length of the gap between the end faces. In order for the transmission wheel blocks to fit together during installation, they must have either one said projection and one said notch or either two projections or two corresponding notches. In order to make all the blocks to be manufactured the same and thus simplify their manufacture, storage and delivery, the solution of one notch and one protrusion is more advantageous.
    A load-transfer joint is provided for the connection between the transmission wheel and the shaft, in particular when the blocks to be connected are tightened on the shaft by means of tightening means before the joints are further tightened by welding joints. The transmission wheel blocks are mounted on the shaft as follows;
    - the transmission wheel blocks are placed on the axle with the end faces facing each other so that there is a corresponding notch against any projection,
    - the tightening means are placed on the outer surfaces of the transmission wheel blocks,
    - the transmission wheel blocks are positioned so that the desired gap width is left between the ends of the blocks,
    - the clamping means of the clamping means are tightened to eliminate the clearance between the transmission wheel blocks and the axle,
    - when the desired clamping force is reached, the transmission wheel blocks are welded together, and
    - the tensioning devices are removed and removed.
    Brief description of the drawings
    The invention will be described in more detail in connection with preferred embodiments with reference to the accompanying drawings, in which Figure 1 shows a side view of two transmission wheel blocks according to a preferred embodiment placed opposite each other, Figure 2 shows a transmission wheel block welded on its sides.
    20185393 prh 27-04-2018
    Detailed description of the invention
    Figure 1 shows a side view of two transmission wheel blocks 1 according to a preferred embodiment, placed opposite each other so that their inner surfaces 35 are located on a substantially coaxial shaft 12. The outer surface 9 of the transmission wheel blocks 1 has axial profile surfaces for transmission. The ends of the transmission wheel blocks 1 have end surfaces 4, the outer edges of which preferably have chamfers 5 which form a welding gap between them. The chamfer 5 can also be, for example, J-shaped to form a U-groove.
    In order for the shrinkage caused by welding to produce a strong compression joint, the end faces 4 must not reach each other. Therefore, the transmission wheel blocks should be sufficiently small compared to the sector according to the full block division, and gaps of width X should be left between the end faces 4, whereby the size of said gap is 15 X / 2. The size X / 2 of the defect is, in the case of two halves of the transmission wheel block, the radius R of the inner arc surface 3 minus dimension Y from the plane of the end faces 4 to the inflection point 10 of the inner arc surface
    Preferably, the inner corners of the end faces 4 have either a shoulder 6 or a corresponding notch 7. The shoulder 6 should be longer than the width X of the gap between the end faces 4 and the opposite notch 7 should be so deep that the shoulder 6 does not rise above its end face. . The thickness 25 of the shoulder 6 must not exceed the depth of the notch 7, so that the side surfaces of the shoulder 6 and the notch 7 do not cause friction and hinder the installation. The shoulder 6 can be so thick that it can at the same time act as a root support. Prior to the welding step, tightening means 11 are placed on both sides of the joints of the transmission wheel blocks 1, by means of which the transmission wheel blocks 1 are tightened on the shaft without backlash, for example with bolts or separate clamps.
    Figure 2 shows a transmission wheel block according to a preferred embodiment, in which the outer surface 9 has a profile surface transverse to the shaft 12. Both side edges of the end faces 4 of the transmission wheel block have chamfers 8 which act as welding gap surfaces.
    权利要求:
    Claims (6)
    [1]
    A transmission wheel block (1), the inner arcuate surface (3) of which has a radius (R) and the outer surface (8) of which has profile transmission surfaces which transmit power to the transmission wheel,
    5 characterized in that the transmission wheel blocks (1) are deficient at both ends (4) compared to the sectors forming a full circle and this deficiency (X / 2) is at least 0.2 mm.
    [2]
    Transmission wheel block (1) according to Claim 1 or 2, characterized in that the outer edge (4) and / or the side edges of the end surface (4) are chamfered in half (5, 8) by a welding groove.
    [3]
    Transmission block (1) according to one of the preceding claims, characterized in that the inner edge of the end surface (4) of the transmission block has either a projection (6)
    15 or has a notch (7) such that said projection fits (6) the transmission wheel blocks (1) aligned with the shaft and the height of said projection (6) is at least twice the size of said gap (X / 2) and the transmission wheel block (1) has either one said protrusion (6) and one said notch (7) or either two protrusions (6) or two notches (7).
    [4]
    Transmission block (1) according to Claim 1, characterized in that the transmission wheel blocks (1) are at most 3 mm (X / 2) less than both ends (4) of the full circle sectors or, if the projection (6) also acts as a root support, this shortage (X / 2) is not more than 5 mm.
    [5]
    A method of mounting transmission wheel blocks on a shaft (12), the method comprising joining the transmission wheel blocks (1) according to any one of claims 1 to 4 as a transmission wheel as follows;
    - the transmission wheel blocks (1) are placed opposite the end surfaces (4) on the shaft so that there is a notch (7) according to claim 4 against a possible projection (6) according to claim 4 and the shaft (12) has substantially the same radius (R) as the transmission wheel blocks (1) on the inner surfaces (3),
    - the tightening means (11) are placed on the outer surfaces (8) of the transmission wheel blocks (1),
    - the transmission wheel blocks are placed on the shaft (12) in such a way that the desired gap width (X) is left between the ends of the blocks,
    - the clamping means of the clamping means (11) are tightened,
    - when the desired tightening force is reached, the transmission wheel blocks are welded
    5 (1) attached to each other and
    - the clamping means (11) are removed and removed.
    [6]
    A transmission wheel consisting of transmission wheel blocks (1) according to any one of claims 1 to 4 welded to each other on the transmission wheel shaft 10, the weld connecting the end surfaces (4) of the transmission wheel blocks (1) not extending to the shaft (12).
    类似技术:
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    同族专利:
    公开号 | 公开日
    US20210041013A1|2021-02-11|
    EP3784928A1|2021-03-03|
    CL2020002771A1|2021-01-22|
    FI128312B|2020-03-13|
    ZA202006260B|2021-09-29|
    RU2760051C1|2021-11-22|
    BR112020019456A2|2021-01-05|
    WO2019207207A1|2019-10-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3111859A|1961-06-15|1963-11-26|Malone Joseph|Two part weld-on replacement rim for sprocket|
    US3159047A|1962-09-21|1964-12-01|George F Dable|Segmented gear|
    SU1753121A1|1989-06-16|1992-08-07|А.Я.Звиргад|Built-up gear|
    US5057058A|1990-09-10|1991-10-15|Crudup Jack M|Split pulley|
    NL9200519A|1992-03-20|1993-10-18|Mcc Nederland|SHARPABLE CHAINWHEEL.|
    DE4415100A1|1994-04-29|1995-11-02|Bayerische Motoren Werke Ag|Assembly method for a body, in particular a toothing, on a one-piece, multi-cranked crankshaft of a reciprocating piston engine, especially an internal combustion engine|
    DE102008046167B4|2008-09-06|2019-08-29|Bayerische Motoren Werke Aktiengesellschaft|Assembly procedure for a split sprocket on a crankshaft|
    法律状态:
    2020-03-13| FG| Patent granted|Ref document number: 128312 Country of ref document: FI Kind code of ref document: B |
    优先权:
    申请号 | 申请日 | 专利标题
    FI20185393A|FI128312B|2018-04-27|2018-04-27|Transmission wheel, and method for its mounting|FI20185393A| FI128312B|2018-04-27|2018-04-27|Transmission wheel, and method for its mounting|
    US17/050,652| US20210041013A1|2018-04-27|2019-04-25|Transmission wheel and a method for its mounting|
    BR112020019456-5A| BR112020019456A2|2018-04-27|2019-04-25|TRANSMISSION WHEEL AND A METHOD FOR ASSEMBLY|
    PCT/FI2019/050335| WO2019207207A1|2018-04-27|2019-04-25|Transmission wheel and a method for its mounting|
    RU2020138699A| RU2760051C1|2018-04-27|2019-04-25|Transmission wheel and method for its installation|
    EP19792427.7A| EP3784928A1|2018-04-27|2019-04-25|Transmission wheel and a method for its mounting|
    ZA2020/06260A| ZA202006260B|2018-04-27|2020-10-08|Transmission wheel and a method for its mounting|
    CL2020002771A| CL2020002771A1|2018-04-27|2020-10-26|Drive wheel and method of mounting.|
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