• 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 invention relates to a travel drive for a mobile machine with at least one hydraulic pump and at least one hydraulic motor, wherein at least one of the two hydraulic units is designed as a bent axis machine (1) comprising a housing (2) with a control cover (9) and a housing (2). on a valve plate (3) rotatably mounted piston drum (4) with axial cylinders (5), of which each cylinder (5) receives a piston (6), with a drive shaft (7) associated with drive flange (8) on the of the cylinders (5) outstanding ends of the piston (6) are supported and with a swing cradle comprising adjustment system for adjusting the displacement volume with an actuator (1 0), with which the piston drum (1 0) with the valve plate (3) with respect to the drive axis (T) a maximum working range is limited, which is limited by a minimum pivot angle (amin) and a maximum pivot angle (amax), wherein a hydraulic fluid f via the pivoting cradle through the valve plate (3), characterized in that the minimum pivot angle (amin) of the working area is displaced by at least 5 °, preferably by at least JO, from its zero position while maintaining the full working range.
    公开号:AT513773A1
    申请号:T50597/2012
    申请日:2012-12-18
    公开日:2014-07-15
    发明作者:Josef Erlinger；Harald Thumfart；Robert Finzel
    申请人:Wacker Neuson Linz Gmbh；
    IPC主号:
    专利说明:

    1
    (38887) HEL
    The invention relates to a traction drive for a mobile machine with at least one hydraulic pump and at least one hydraulic motor, wherein at least one of the two hydraulic units is designed as a bent axis machine comprising a housing with a control cover and a rotatably mounted in the housing on a valve plate piston drum with axial cylinders of which each cylinder receives a piston, with a drive shaft associated drive flange on which the protruding from the cylinders free ends of the piston are supported and with a swivel cradle adjustment system for adjusting the absorption volume with an actuator, with which the piston drum with the valve plate relative to the drive axle is pivotable about a maximum working range, which is limited by a minimum and a maximum pivot angle, wherein a hydraulic fluid guide via the pivoting cradle through the valve plate.
    Schrägachsenmaschinen in the context of the invention are hydraulic machines, as axial piston pump for converting mechanical energy, ie torque or speed, in hydraulic energy, ie flow or pressure or axial piston motor for the implementation of hydraulic energy (flow or pressure) into mechanical energy (Torque or speed) are used. A generic oblique-axis machine is known, for example, from EP 0 728 945 A1. Angular axis machines are usually designed such that the piston drum in the control cover (the housing head) with an actuator between a minimum pivot angle of about 0 ° and a maximum pivot angle of up to 32, 33 ° is pivotable, for which this area is designed as a pivoting cradle. The supply of the piston pump, namely the intake passage and the pressure passage, are guided over or through said pivoting cradle 1/12 2. The range by which the piston drum between the minimum and maximum swing angle can be pivoted in the housing is structurally limited and is determined in particular by the guided in the pivoting cradle in the control cover control plate (valve plate), which falls below the minimum swing angle or when exceeding the maximum Pivoting angle no longer allows proper supply and removal of hydraulic fluid through the control cover. In particular, exceeding these limits causes leakage of hydraulic fluid from the flow channels between the control cover and valve plate in the housing, whereby the safe operation of the machine would no longer exist.
    As long as a swivel angle of 0 ° is set, ie, drive shaft axis and piston drum axis coincide, the oblique axis machine does not deliver any volume flow or, in this operating state, this machine has virtually no displacement volume. If the piston drum is pivoted with the piston in the direction of maximum pivoting angle, so the pistons are swung to the side, so the pistons occur during the rotational movement triggered by the inclination of the piston drum on the inner side of the bend deeper into the cylinder and on the outside of the bend out of the cylinder in the direction of the lower Dead center off. During a rotation, the pistons are alternately pulled out of the cylinder or pressed into the cylinder by the connection with the drive flange. As a result, when the pistons are withdrawn from the control plate, a negative pressure is created in the cylinders which draws the hydraulic fluid into the cylinder via the pivoting cradle. On the other hand, when displacing the pistons against the control plate, an overpressure is created which expels hydraulic fluid from the cylinder via the pivoting cradle out of the hydraulic unit.
    Such Schrägeachsmaschinen can be relatively cheaply mass produced. However, as already mentioned, the maximum adjustment range is limited by design. If a larger adjustment range needs to be covered or required due to the application, it must be made use of inclined axis machines with yoke adjustment, ie hydraulic units that allow an adjustment range of 0 ° to 45 °. In these, structurally very complex and thus also very expensive machines, the housing is divided into two or more and is the piston barrel comprehensive housing shell with respect to the drive shaft receiving housing part pivotally. Precisely this requires a considerable amount of design and monetary effort, which is why lean-axis machines with yoke adjustment for traction drives in the low-price segment can not be used.
    Based on a prior art of the pre-described type, the invention has for its object to provide a bent axis machine of the type described, which can provide a significantly increased displacement or delivery volume with low construction costs, without having to resort to a bent axis machine with yoke adjustment.
    The invention solves this problem in that the minimum pivot angle of the work area is shifted by maintaining at least 5 °, preferably by at least 7 ° from its zero position while maintaining the full working range.
    According to the invention, it is thus intended to design a bent axis machine such that the lower region of 0 ° to 5 °, in particular to 7 °, is recessed at all and is not available for use. It has been shown that this range is practically useless in practice practically in many uses, since, especially when used as a flydriver, there is only a poor efficiency in this area. For various applications, such as in drive trains of construction machinery, various other hydraulic drives, od. Like. But especially the maximum intake volume of importance, which can be increased by the inventive displacement of the entire work area. With the invention, it is intended not to use the lower area in principle, so save and instead to supplement the upper area to the recessed area in the lower area. Since the angular difference between the maximum and minimum pivot angle is limited by design, the entire working range is "upwardly" shifted according to the invention to fully utilize the full working range or swivel range, whereby the maximum swivel angle which can be used in operation is extended significantly compared to the prior art.
    The limited by the control mirror maximum swing angle is at least 37 °, preferably at least 39 °. This measure according to the invention results in an increase of the maximum absorption volume by a considerable amount, which considerably increases the range of use of such oblique-axis machines, at least for certain areas, for example for traction drives.
    In order to be able to implement the invention in practice on bent axis machines, naturally the control mirror receiving guide must be configured accordingly "offset". Thus, in contrast to the prior art, the theoretical adjustment ranges available for a travel drive can also be fully utilized.
    Particularly simple construction conditions arise when the one guide for the valve plate (or the control mirror) forming the control cover is placed at an angle of at least 21 ° to the housing, which inclination angle between a Triebwellenachsnormalen and inclined to the piston drum pivot axis contact surfaces between the housing and Housing head is applied. According to the invention, it is thus provided that the housing head, which has already been mounted inclined on the housing, is now placed on the housing in a more inclined manner, leaving out the lowest pivoting angle range and attaching it to the uppermost pivoting angle range. A Steuerdeckelanschlussflächennormale the control cover is inclined relative to the drive shaft axis by an inclination angle, which corresponds to half the sum of maximum and minimum swing angle (ß = (amax + amjn) / 2), where ß is equal to 21 °.
    The invention also relates to a Schrägachsenmaschine with the features of claim 1, which is provided for a drive of a mobile machine. 4/12 5
    In the drawing, the invention is illustrated schematically with reference to an embodiment.
    Fig. 1 shows a longitudinal section through a bent axis machine according to the invention.
    An inclined-axis machine 1 for a traction drive according to the invention comprises, inter alia, a housing 2, a piston drum 4 rotatably mounted in the housing 2 on a valve plate 3 with axial cylinders 5, of which each cylinder 5 receives a piston 6. In addition, a drive shaft 7 associated drive flange 8 is provided, on which the protruding from the cylinders 5 free ends of the piston 6 are supported. The piston drum 4 and guided in particular in the control cover 9 valve plate 3 is in the housing 2 for adjusting the intake volume with an actuator 10 relative to the drive shaft T pivotable about a maximum working range, which is limited by a minimum swing angle amin and a maximum pivot angle amax. The adjustment system for adjusting the absorption volume with the actuator 10 comprises a pivoting cradle, substantially the valve plate 3 and the associated pivoting guide in the control cover 9. Hydraulic fluid is passed over the pivoting cradle.
    According to the invention, the minimum pivoting angle (amin) of the working area, while maintaining the full working range, is displaced by at least 5 °, preferably by at least 7 °, from its zero position. The limited by the valve plate 3 maximum pivot angle amax is at least 37 °, preferably at least 39 °.
    Constructively, the invention is achieved according to the embodiment in that a Steuerdeckelanschlussflächormormal K of the control cover 9 is inclined relative to the drive shaft axis T by an inclination angle ß, which half the sum of maximum and minimum pivot angle, ß = (amax + amine) / 2 corresponds where ß is greater than or equal to 21 °.
    The lower range of 0 ° to 5 °, especially up to 7 °, is no longer available for use. The entire maximum available work area 5/12 6 is moved "upwards" to make the full work area or swivel range fully usable. 6/12
    权利要求:
    Claims (4)
    [1]
    Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. 1. Win drive for a mobile work machine with at least one hydropump and with at least one hydraulic motor, wherein at least one of the two hydraulic units is designed as a bent axis machine (1) comprising a housing (2) with a control cover (9) and in the housing (2) on a valve plate (3) rotatably mounted piston drum (4) with axial cylinders (5), of which each cylinder (5) receives a piston (6), with a drive shaft (7) associated drive flange (8) on which from the cylinders (5) protruding free ends of the piston (6) are supported and with a swivel cradle comprising adjustment system for adjusting the absorption volume with an actuator (10), with the piston drum (10) with the valve plate (3) relative to the drive axis (T) is pivotable about a maximum working range of a minimum pivot angle (amjn) and a max imalen pivoting angle (amax) is limited, wherein a hydraulic fluid guide via the pivoting cradle through the valve plate (3), characterized in that the minimum pivot angle (amin) of the working area while maintaining the full working range by at least 5 °, preferably by at least 7 ° shifted to its zero position.
    [2]
    2. Drive according to claim 1, characterized in that, in particular of the valve plate (3) limited, maximum pivot angle (amax) is at least 37 °, preferably at least 39 °.
    [3]
    3. Drive according to claim 1, characterized in that a Steuerdeckelanschlussflächennormale (K) of the control cover (9) relative to the drive shaft axis (T) by an inclination angle (ß) is inclined, which half of the sum 7/12 of maximum and minimum pivot angle, ß = (amax + amine) / 2, where β is greater than or equal to 210.
    [4]
    4. Schrägachsenmaschine (1) with the features according to claim 1 for a drive of a mobile machine. Linz, 18 December 2012 Wacker Neuson Linz GmbH by: / Dl Helmut Hübscher / (electronically signed) 8/12
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    同族专利:
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    引用文献:
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    CN112459981A|2020-11-29|2021-03-09|江苏可奈力机械制造有限公司|Slide inclined shaft variable high-pressure plunger pump|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50597/2012A|AT513773B1|2012-12-18|2012-12-18|Travel drive for a mobile work machine|ATA50597/2012A| AT513773B1|2012-12-18|2012-12-18|Travel drive for a mobile work machine|
    PCT/AT2013/050254| WO2014094024A1|2012-12-18|2013-12-17|Bent-axis machine|
    EP13823917.3A| EP2935883B1|2012-12-18|2013-12-17|Axial piston machine of the slant axis type|
    CN201390000982.3U| CN204900172U|2012-12-18|2013-12-17|Oblique axis machine and be used for drive arrangement of mobilizable work machinery|
    US14/652,504| US10151305B2|2012-12-18|2013-12-17|Bent-axis machine having minimum non-zero pivot angle|
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