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公开(公告)号：US20020189251A1
公开(公告)日：2002-12-19
申请号：US10202066
申请日：2002-07-25
申请人： HYDRO-THOMA LIMITED
IPC分类号： F16D039/00
CPC分类号： B60K17/105 , B60K11/06 , B60Y2200/223 , F16H57/02 , Y10T74/2186
摘要： A hydrostatic transaxle axle assembly for a vehicle such as a grass mowing lawn or garden tractor comprising a housing for an internally disposed hydrostatic transmission having a variable-displacement hydraulic pump fluidly connected to a fixed-displacement hydraulic motor, the hydraulic motor being connected by differential gearing to axle shafts supported in the housing. The housing is formed by three housing members, two of which are preferably separable on a parting plane coincident with the longitudinal axes of the axle shafts. One of the housing members being provided with an opening to allow a portion of one of the other housing members to extend through, and where the extending housing member contains within its interior a number of internal fluid passages for fluidly connecting the hydraulic pump to the hydraulic motor. This construction allows for improved cooling of the power transmitting fluid flowing between the pump and motor and simplifies manufacture of the transaxle such that the bulk or all the machining operations can be carried out in only one of the three housing elements, this housing member being the smallest of the three which can be completed using a comparatively smaller sized CNC machining-center than would otherwise be the case. The two remaining housing elements may be used in an as cast or supplied condition.
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公开(公告)号：US20020115519A1
公开(公告)日：2002-08-22
申请号：US10068888
申请日：2002-02-11
申请人： HYDRO-THOMA LIMITED
IPC分类号： F16H047/04
CPC分类号： B60K17/105 , B60Y2200/223 , Y10T74/2186
摘要： An axle assembly for use in lawn tractors, pedestrian walk-behind mowers and snow blowers in the form of a housing having an internally disposed hydrostatic transmission and speed reducing gearing. An input shaft supported in the housing for driving a variable-displacement hydraulic pump of the hydrostatic transmission, the pump fluidly coupled to a fixed-displacement hydraulic motor of the hydrostatic transmission, and where the motor is drivingly connected through the speed reducing gearing to an output axle shaft or shafts. A mechanical differential disposed within said housing for applications requiring differential speeds of said axle output shafts. The housing being formed by three housing members and joined together along a substantially planar and horizontally peripheral seam formed therebetween such that two of said housing members are to one side of said seam and join with the third housing element. Two internal chambers formed by the three housing elements where one chamber contains the hydrostatic transmission and the other chamber contains the speed reducing gearing. A connecting shaft spanning between the chambers to provide the power transmission link between the hydrostatic transmission and the speed reducing gearing.
摘要翻译： 用于草坪拖拉机，行人步行割草机和具有内部设置的静液传动和减速传动装置的壳体形式的除雪机的车轴组件。 支撑在壳体中的输入轴用于驱动静液压变速器的可变排量液压泵，泵与流体静力传动的固定排量液压马达流体耦合，并且其中马达通过减速齿轮驱动地连接到 输出车轴或轴。 设置在所述壳体内的用于需要所述轴输出轴差速的应用的机械差速器。 壳体由三个壳体构件形成并且沿着形成在其间的基本上平坦且水平的周边接缝连接在一起，使得两个所述壳体构件位于所述接缝的一侧并与第三壳体元件连接。 由三个壳体元件形成的两个内部腔室，其中一个腔室包含静液压传动装置，另一个腔室包含减速齿轮箱。 连接轴跨过室之间，以提供静液传动和减速齿轮传动之间的动力传递连接。
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公开(公告)号：US06884195B2
公开(公告)日：2005-04-26
申请号：US10463603
申请日：2003-06-18
CPC分类号： B60K17/105 , B60K11/06 , B60Y2200/223 , F16H57/02 , Y10T74/2186
摘要： A hydrostatic transaxle axle assembly for a vehicle such as a grass mowing lawn or garden tractor comprising a housing for an internally disposed hydrostatic transmission having a variable-displacement hydraulic pump fluidly connected to a fixed-displacement hydraulic motor, the hydraulic motor being connected by differential gearing to axle shafts supported in the housing. The housing is formed by three housing members, two of which are preferably separable on a parting plane coincident with the longitudinal axes of the axle shafts. One of the housing members being provided with an opening to allow a portion of one of the other housing members to extend through, and where the extending housing member contains within its interior a number of internal fluid passages for fluidly connecting the hydraulic pump to the hydraulic motor. This construction allows for improved cooling of the power transmitting fluid flowing between the pump and motor and simplifies manufacture of the transaxle such that the bulk or all the machining operations can be carried out in only one of the three housing elements, this housing member being the smallest of the three which can be completed using a comparatively smaller sized CNC machining-center than would otherwise be the case. The two remaining housing elements may be used in an as cast or supplied condition.
摘要翻译： 一种用于车辆的静液力驱动桥组件，例如草地草坪或园林拖拉机，其包括用于内部设置的静液传动装置的壳体，其具有流体连接到固定排量液压马达的可变排量液压泵，所述液压马达通过差速器连接 传动到支撑在壳体中的车轴。 壳体由三个壳体构件形成，其中两个壳体构件优选地在与车轴的纵向轴线重合的分型平面上是可分离的。 壳体中的一个设置有开口以允许一个其它壳体构件的一部分延伸穿过，并且其中延伸的壳体构件在其内部包含许多内部流体通道，用于将液压泵流体连接到液压 发动机。 这种结构允许改善在泵和电动机之间流动的动力传递流体的冷却，并且简化了驱动桥的制造，使得大体积或所有的加工操作只能在三个壳体元件中的一个中执行，该壳体构件是 最小的三个可以使用相对较小的CNC加工中心完成，而不是其他情况。 剩余的两个壳体元件可以以铸造或供应状态使用。
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公开(公告)号：US20030216208A1
公开(公告)日：2003-11-20
申请号：US10463603
申请日：2003-06-18
申请人： HYDRO-THOMA LIMITED
IPC分类号： F16D039/00
CPC分类号： B60K17/105 , B60K11/06 , B60Y2200/223 , F16H57/02 , Y10T74/2186
摘要： A hydrostatic transaxle axle assembly for a vehicle such as a grass mowing lawn or garden tractor comprising a housing for an internally disposed hydrostatic transmission having a variable-displacement hydraulic pump fluidly connected to a fixed-displacement hydraulic motor, the hydraulic motor being connected by differential gearing to axle shafts supported in the housing. The housing is formed by three housing members, two of which are preferably separable on a parting plane coincident with the longitudinal axes of the axle shafts. One of the housing members being provided with an opening to allow a portion of one of the other housing members to extend through, and where the extending housing member contains within its interior a number of internal fluid passages for fluidly connecting the hydraulic pump to the hydraulic motor. This construction allows for improved cooling of the power transmitting fluid flowing between the pump and motor and simplifies manufacture of the transaxle such that the bulk or all the machining operations can be carried out in only one of the three housing elements, this housing member being the smallest of the three which can be completed using a comparatively smaller sized CNC machining-center than would otherwise be the case. The two remaining housing elements may be used in an as cast or supplied condition.
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公开(公告)号：US20020124560A1
公开(公告)日：2002-09-12
申请号：US10134459
申请日：2002-04-30
申请人： HYDRO-THOMA LIMITED
IPC分类号： F16D039/00
CPC分类号： B60K17/105 , B60K11/06 , B60Y2200/223 , F16H57/02 , Y10T74/2186
摘要： A hydrostatic transaxle axle assembly for a vehicle such as a grass mowing lawn or garden tractor comprising a housing for an internally disposed hydrostatic transmission having a variable-displacement hydraulic pump fluidly connected to a fixed-displacement hydraulic motor, the hydraulic motor being connected by differential gearing to axle shafts supported in the housing. The housing is formed by three housing members, two of which are preferably separable on a parting plane coincident with the longitudinal axes of the axle shafts. One of the housing members being provided with an opening to allow a portion of one of the other housing members to extend through, and where the extending housing member contains within its interior a number of internal fluid passages for fluidly connecting the hydraulic pump to the hydraulic motor. This construction allows for improved cooling of the power transmitting fluid flowing between the pump and motor and simplifies manufacture of the transaxle such that the bulk or all the machining operations can be carried out in only one of the three housing elements, this housing member being the smallest of the three which can be completed using a comparatively smaller sized CNC machining-center than would otherwise be the case. The two remaining housing elements may be used in an as cast or supplied condition.
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公开(公告)号：US20020173398A1
公开(公告)日：2002-11-21
申请号：US09854512
申请日：2001-05-15
申请人： Hydro-Thoma Limited
IPC分类号： F16H047/04
CPC分类号： B60K17/105 , F16H47/02 , Y10T74/19149 , Y10T74/2186
摘要： A hydrostatic transmission connected by means of a power transmission shaft to a speed reducing transmission, the housing structure surrounding said transmissions defining a first and second internal volumes. The first internal volume providing a receptacle for the hydrostatic fluid and for containing the hydrostatic transmission components. The second internal volume, which may or may not contain the gear train components, operates as an overflow receiver for fluid transferred from the first internal volume. A duct disposed in the housing provides the only flow path between the volumes and any fluid volume change in the first internal volume due to temperature variation is translated in a change in depth in the overflow receiver. Preferably, the duct operates in accordance to the siphon principle and catering for fluid volume change internally is a significant improvement over current practice where reliance is placed on external paraphernalia to achieve this end. External devices as such can be prone to leakage whereas with the present invention, fluid expansion can be taken care of internally for an improved dependability in such hydrostatic transmission devices
摘要翻译： 通过动力传动轴连接到减速传动装置的静液传动装置，围绕所述传动装置的壳体结构限定第一和第二内部容积。 该第一内部容积为静液压流体提供容器并容纳静液压传动部件。 可能含有或不包含齿轮系组件的第二内部容积作为从第一内部容积传送的流体的溢流接收器。 设置在壳体中的管道提供体积之间的唯一流动路径，并且由于温度变化导致的第一内部体积中的任何流体体积变化在溢流接收器中的深度变化中被转换。 优选地，管道根据虹吸原理运行，并且内部的流体体积变化的适应性是对依赖于外部用具实现该目的的当前实践的显着改进。 外部设备本身可能容易泄漏，而在本发明中，可以在内部注意流体膨胀以改善这种静液压传动装置中的可靠性
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公开(公告)号：US20020115521A1
公开(公告)日：2002-08-22
申请号：US10082187
申请日：2002-02-26
申请人： HYDRO-THOMA LIMITED
IPC分类号： F16H047/04 , F16H048/06
CPC分类号： F16H57/027 , B60K17/105 , B60Y2200/223 , F16H47/02 , F16H61/4174
摘要： A hydrostatic power transmitting device in combination with a speed reducing apparatus together disposed within a common housing having an interior space divided by partitioning device into a first region in which the hydrostatic unit is disposed and a second region in which said speed reducer is accommodated. First and second regions are segregated from each other by the partitioning device being in the form of a flexible non-porous barrier. The elastically deformable partitioning device can therefore adjust its shape to take up any change in the amount of hydrostatic transmitting fluid in the first region due to temperature changes of the fluid and facilitates the regulation in depth of lubricant held by the second region. Thereby an initially low level of lubricant in the second region lessens the adverse effect of power-retarding drag losses, especially during cold weather winter operation, and a rising level of lubricant ensures good lubrication when temperatures are elevated and viscosity is low. Preferably the second region is sealed from the environment, and the above atmospheric positive pressure in the second chamber aided or induced by the expanding volume of fluid in the first region provides a net increase of pressure experienced by low-pressure side of the closed-loop circuit of the hydrostatic transmission.
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公开(公告)号：US06875147B2
公开(公告)日：2005-04-05
申请号：US10455727
申请日：2003-06-06
CPC分类号： B60K17/105 , B60Y2200/223 , Y10T74/2186
摘要： An axle assembly has an internally disposed hydrostatic transmission and speed reducing gearing. An input shaft supported in the housing drives a variable-displacement hydraulic pump, the pump fluidly coupled to a fixed-displacement hydraulic motor, and the motor drivingly connected through the speed reducing gearing to an output axle shaft. The housing being formed by three housing members and joined together along a substantially planar and horizontally peripheral seam formed therebetween such that two of the housing members are to one side of the seam and join with the third housing element. Two internal chambers formed by the three housing elements where one chamber contains the hydrostatic transmission and the other chamber contains the speed reducing gearing. A connecting shaft spanning between the chambers to provide the power transmission link between the hydrostatic transmission and the speed reducing gearing.
摘要翻译： 轴组件具有内部设置的静液传动和减速传动装置。 支撑在壳体中的输入轴驱动可变排量的液压泵，泵与流体连接的固定排量的液压马达，以及通过减速齿轮驱动地连接到输出轴的马达。 壳体由三个壳体构件形成并且沿着形成在其间的基本上平坦且水平的周向接缝连接在一起，使得两个壳体构件位于接缝的一侧并与第三壳体元件连接。 由三个壳体元件形成的两个内部腔室，其中一个腔室包含静液压传动装置，另一个腔室包含减速齿轮箱。 连接轴跨过室之间，以提供静液传动和减速齿轮传动之间的动力传递连接。
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公开(公告)号：US20030199354A1
公开(公告)日：2003-10-23
申请号：US10455727
申请日：2003-06-06
申请人： HYDRO-THOMA LIMITED
IPC分类号： F16H047/04
CPC分类号： B60K17/105 , B60Y2200/223 , Y10T74/2186
摘要： An axle assembly for use in lawn tractors, pedestrian walk-behind mowers and snow blowers in the form of a housing having an internally disposed hydrostatic transmission and speed reducing gearing. An input shaft supported in the housing for driving a variable-displacement hydraulic pump of the hydrostatic transmission, the pump fluidly coupled to a fixed-displacement hydraulic motor of the hydrostatic transmission, and where the motor is drivingly connected through the speed reducing gearing to an output axle shaft or shafts. A mechanical differential disposed within said housing for applications requiring differential speeds of said axle output shafts. The housing being formed by three housing members and joined together along a substantially planar and horizontally peripheral seam formed therebetween such that two of said housing members are to one side of said seam and join with the third housing element. Two internal chambers formed by the three housing elements where one chamber contains the hydrostatic transmission and the other chamber contains the speed reducing gearing. A connecting shaft spanning between the chambers to provide the power transmission link between the hydrostatic transmission and the speed reducing gearing.
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公开(公告)号：US20030192402A1
公开(公告)日：2003-10-16
申请号：US10446774
申请日：2003-05-29
申请人： HYDRO-THOMA LIMITED
IPC分类号： F16H047/02
CPC分类号： B60K17/105 , F16H47/02 , Y10T74/19149 , Y10T74/2186
摘要： A hydrostatic transmission and gear transmission located in the same or separate housings structures, and mechanically drivingly connected together by a power transmission shaft. That housing structure surrounding the hydrostatic transmission defining a first internal volume containing the hydrostatic transmission components and providing a receptacle for the hydrostatic fluid. That housing structure surrounding the gear transmission defining a gear compartment sump. As one example, the housing structure surrounding the hydrostatic transmission may further define a second internal volume to operate as an overflow receiver for fluid transferred from the first internal volume. A duct operating in accordance with the siphon principle connects the internal volumes and where a pressure restriction valves ensures an above ambient pressure level in the volumes when the hydrostatic and gear transmission is operating. Alternatively, the gear compartment sump may act as the second internal volume.
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