Hydraulic pump or motor with a mount configuration for increased torque

Abstract

Hydraulic pumps or motors with mounting configurations for increased torque A hydraulic pump (48) or motor (46) includes a mounting flange (78) disposed at a first end of a housing (60). The mounting flange (78) defines a pair of bolt receiving slots (80) disposed on opposite sides of a shaft (58) along an X-axis. The pair of bolt receiving slots (80) each define radial centers (82) spaced apart by an X-dimension (84), and a pilot lug (86) extends longitudinally from the mounting flange (78) and defines a pilot lug diameter (88). A ratio of the X-dimension (84) to the pilot lug diameter (88) is in the range of 1.1 to 1.5.

Description

Technical Field

[0001] The present invention relates to a hydraulic pump or motor used in an engine assembly or the like. Specifically, the present disclosure relates to a mount configuration for such a pump or motor that enables the shaft of the pump or motor to accommodate increased torque.

Background Art

[0002] An engine assembly often uses a hydraulic pump or a hydraulic motor that supplies hydraulic fluid at high pressure or converts high-pressure or high-flow hydraulic fluid into high torque supplied from a shaft. Some hydraulic pumps or motors are connected to a fan that blows air through a radiator to cool a coolant used to cool the engine. One way to improve the cooling efficiency of a cooling system is to operate the fan faster, which requires more torque and generally requires a larger hydraulic motor and / or pump.

[0003] However, the space within the engine compartment is limited and / or using a larger hydraulic motor and / or pump is costly, making the use of such a motor and / or pump unrealistic. Also, there may be a desire to retrofit an engine already in use in the field with a more robust motor without significantly changing the engine design.

[0004] Currently, there is a trade-off between improving the cooling efficiency of an engine's cooling system and the cost and / or size of the hydraulic motor.

Summary of the Invention

[0005] According to an embodiment of the present invention, a hydraulic pump or motor with a mount configuration for increased torque is provided. The pump or motor includes a shaft defining a longitudinal axis, a Y-axis extending orthogonally upward from the longitudinal axis, and an X-axis extending orthogonally to the longitudinal axis and the Y-axis, a housing that may define a first longitudinal end, a second longitudinal end, and a cavity extending from the first longitudinal end to the second longitudinal end, a plurality of mechanical components including one hydraulic interaction component that may be disposed within the cavity, and a manifold cap attached to the second longitudinal end and defining an inlet and an outlet. The shaft may extend from the cavity beyond the first longitudinal end of the housing, and the mount flange may be disposed at the first longitudinal end of the housing. The mount flange may define a pair of bolt-receiving slots disposed on both sides of the shaft along the X-axis, and the pair of bolt-receiving slots may each define a radius center spaced from each other by an X dimension. The pilot protrusion may extend longitudinally away from the mount flange and define a pilot protrusion diameter, and the ratio of the X dimension to the pilot protrusion diameter may be in the range of 1.1 to 1.5.

[0006] According to another embodiment of the present invention, a hydraulic pump or motor with a mount configuration for increased torque is provided. The pump or motor includes a shaft defining a longitudinal axis, a Y-axis extending orthogonally upward from the longitudinal axis, and an X-axis extending orthogonally to the longitudinal axis and the Y-axis, a housing defining a first longitudinal end, a second longitudinal end, and a cavity extending from the first longitudinal end to the second longitudinal end, a plurality of mechanical components including one hydraulic interaction component that can be disposed within the cavity, and a manifold cap attached to the second longitudinal end and defining an inlet and an outlet. The shaft may extend beyond the first longitudinal end of the housing from the cavity, and the mount flange may be disposed at the first longitudinal end of the housing. The mount flange may define a pair of bolt-receiving slots disposed on both sides of the shaft along the X-axis, and the pair of bolt-receiving slots may each define a radius center spaced apart from each other by only a Y-dimension defining an X-dimension and a width of the slot. The ratio of the X-dimension to the Y-dimension may be in the range of 9.5 to 9.8.

[0007] A hydraulic fan motor pump assembly according to an embodiment of the present disclosure may include a shaft defining a longitudinal axis, a Y axis extending orthogonally upward from the longitudinal axis, and an X axis extending orthogonally to the longitudinal axis and the Y axis, a housing defining a first longitudinal end, a second longitudinal end, and a cavity extending from the first longitudinal end to the second longitudinal end, a plurality of mechanical components including at least one hydraulic drive component that may be disposed within the cavity, and a manifold cap attached to the second longitudinal end and defining an inlet and an outlet. The shaft may extend beyond the first longitudinal end of the housing from the cavity, and the mount flange may be disposed at the first longitudinal end of the housing. The mount flange may define a pair of bolt receiving slots disposed on both sides of the shaft along the X axis, and the pair of bolt receiving slots may each define a radius center spaced apart from each other by an X dimension. The pilot protrusion may extend longitudinally away from the mount flange and define a pilot protrusion diameter, and the ratio of the X dimension to the pilot protrusion diameter may be in the range of 1.1 to 1.5.

Brief Description of the Drawings

[0008] The drawings incorporated herein and constituting a part of this specification illustrate some embodiments of the present disclosure and are used in conjunction with the description to explain the principles of the present disclosure. In the drawings, FIG. 1 is a perspective view of a hydraulic excavator according to various embodiments of the present disclosure, and is a perspective view of a hydraulic excavator that can use an engine using a hydraulic pump or motor having a mount configuration for corresponding to increased torque. FIG. 2 is a schematic view showing the engine of the excavator of FIG. 1 alone, and shows an engine hydraulic pump that supplies power to a hydraulic fan motor. FIG. 3 is a perspective view showing the hydraulic fan pump of FIG. 2 independently. FIG. 4 is a left side view showing a mount flange, a bolt slot, and a pilot ring of the hydraulic fan pump of FIG. 3. FIG. 5 is a front cross-sectional view of the hydraulic fan pump of FIG. 3, showing an O-ring in a slot extending circumferentially at the periphery of the pilot projection. FIG. 6 is a perspective view of the fitting of the hydraulic fan pump according to another embodiment of the present disclosure and the female mount member. FIG. 7 is a cross-sectional side view of the hydraulic fan pump of FIG. 6 and the female mount member. FIG. 8 is a left side view of the hydraulic fan pump of FIG. 6 excluding the female mount member. FIG. 9 is a right side view of the female mount member of FIG. 6 excluding the pump. FIG. 10 is a cross-sectional view of the female mount member of FIG. 9.

DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with examples shown in the accompanying drawings. As much as possible, the same reference numerals are used in the drawings to indicate the same or similar parts. In some cases, the reference numerals are represented in this specification, and the drawings indicate that letters, such as 100a, 100b, or primes such as 100\’, 100’’ follow the reference numerals. It should be understood that using an English letter or a prime immediately after a reference numeral indicates that these features have similar shapes and similar functions, as is often seen when the geometric shape surrounds a plane mirror image. For the sake of ease of explanation in this specification, letters and primes are not usually included here, but can be shown in the drawings to indicate the repetition of features having similar or identical functions or geometric shapes described in this specification.

[0010] Hydraulic pump or motor assemblies, hydraulic fan motor assemblies, and engine assemblies constructed in accordance with various embodiments of the present disclosure that may break the aforementioned compromise between pump or motor size / cost will be described. Torque output / input for enhancing engine cooling capacity will be described later. Next, exemplary machines such as hydraulic excavators that can employ these embodiments will be described first, and it is understood that any suitable machine, including electric diesel engines, bulldozers, or other heavy machinery used in the marine, geotechnical, construction, and mining industries, can use these embodiments.

[0011] Starting with FIG. 1, a work machine 20 configured to supply power to a machine is shown, which can include an engine 22, such as a diesel engine, a gasoline internal combustion engine, a natural gas engine, an electric motor, and other known power sources, or combinations thereof. Further, one embodiment of the machine 20 includes an engine 22, an operator compartment 26, and a frame 24 that provides support to the engine 22, the operator compartment 26, and other such components of the work machine 20. Further, the operator compartment 26 defines a fully enclosed, or in some cases, semi-enclosed area for the operator of the machine 20 to sit or stand during operation of the machine.

[0012] Furthermore, the operator compartment 26 is generally configured to include a set of operation control devices 28, such as, but not limited to, joysticks, foot pedals, levers, steering wheels, and other similar control devices. The operation control devices 28 are operated by an operator to control and operate the work machine 20. In some embodiments, the operator compartment 26 further includes one or more visual displays 30 that display or communicate information to the operator of the machine 20.

[0013] The work machine 20 further includes a set of ground engaging elements 32 operably coupled to the frame 24. A non-limiting example of the machine 20 includes ground engaging elements 32 configured as a set of tracks, although wheels or other such propulsion elements are also possible. The ground engaging elements 32 are driven by the engine 22 to propel the work machine 20 in a parting direction. Further, the ground engaging elements 32 may be operably connected to one or more operation control devices 28 such that the ground engaging elements 32 are actively controlled to propel and steer the work machine 20 around the work site 33.

[0014] Also, the work machine 20 can include at least one work tool 34 such as a bucket, drill, saw, forklift, hammer, auger, grapple, or other such tool operably connected to the frame 24 or other portion of the work machine 20, but is not limited thereto. In one non-limiting example, the work tool 34 is connected to the frame 24 via a boom 36 and an actuating arm 38. The boom 36 and the actuating arm 38 include one or more actuating cylinders 40 configured to raise, lower, excavate, dump, or perform other operations on the work tool 34.

[0015] Referring now to FIG. 2, the details of the engine can be seen more clearly. The engine 22 includes a main hydraulic pump 48 that supplies pressurized hydraulic fluid / oil (via hydraulic line(s) 47) to a hydraulic fan motor assembly 46 to drive a fan 49 to draw air through a radiator assembly 50, where the coolant is cooled by the main hydraulic pump 48 and supplied (via cooling line(s) 52) to the engine's cooling system. An ECU 54 (electronic control unit) is also provided that communicates with the various systems of the engine 22, including the hydraulic system and the cooling system. In particular, the hydraulic fan motor assembly may be provided with one or more valves 55 to control its operation.

[0016] Referring to FIGS. 3 and 4, the details of the hydraulic fan pump assembly 48, including the shaft 58, the housing 60, and the manifold cap 62, can be more easily identified.

[0017] The shaft 58 may include a rotating body (e.g., cylindrical, conical, etc.) that defines a longitudinal axis 64 (see FIG. 3), a Y axis (see FIG. 4) that extends orthogonally upward from the longitudinal axis 64, and an X axis that extends orthogonally to the longitudinal axis and the Y axis.

[0018] As shown in FIG. 3, the housing 60 may define a first longitudinal end 66, a second longitudinal end 68, and a cavity 70 (shown by the dashed line) that extends from the first longitudinal end 66 to the second longitudinal end 68. That is, the cavity 70 may have a portion that extends completely through the body of the housing 60. A plurality of mechanical components (see line 71) including at least one hydraulic drive component may be disposed within the cavity 70 of the housing 60. Examples of these components include at least one of a vane, a piston, an inclined plate, etc.

[0019] The manifold cap 62 may be attached (e.g., by a fastener) to the second longitudinal end 68 and may define an inlet 72 and an outlet 74 (see FIG. 3). The shaft 58 may extend from the cavity 70 of the housing 60 beyond the first longitudinal end 66 of the housing 60.

[0020] During operation of the motor, hydraulic fluid / oil enters the inlet, drives the internal components of the motor, and exits the outlet. The internal components of the motor are mechanically coupled to the shaft, and then the shaft rotates. The end of the shaft engages with the hub of the fan or another shaft mechanically coupled to the hub to drive the fan. The reverse is also true for the operation of the pump. The shaft of the pump may be powered by an engine, and the engine rotates the internal components of the pump to generate hydraulic pressure and flow. An example of a part of such an interface between the engine and the pump is shown in FIG. 3 as the exposed free end of the shaft 58 that includes teeth 76. In other embodiments of the present disclosure, other types of interfaces including splines, press fits, fasteners, etc. are possible.

[0021] Focusing here on FIG. 4, the mantle flange 78 may be disposed at the first longitudinal end 66 of the housing and define a pair of bolt receiving slots 80 disposed on both sides of the shaft 58 along the X-axis. Each of the pair of bolt receiving slots 80 may define a radius center 82 spaced apart by an X dimension 84 (i.e., measured along the X-axis) and a pilot projection 86 extending longitudinally from the mantle flange 78 for receiving the pilot cavity 87 (see FIG. 5) of the fan assembly 50.

[0022] Referring to FIG. 4, in some embodiments of the present disclosure, the pilot projection 86 may define a pilot projection diameter 88, and the ratio of the X dimension 84 to the pilot projection diameter 88 may be in the range of 1.1 to 1.5 (e.g., 1.3). In this case, each of the pair of bolt receiving slots 80 defines a Y dimension 90, and in some embodiments of the present disclosure, the ratio of the X dimension 84 to the Y dimension 90 may be in the range of 9.5 to 9.8 (e.g., 9.67).

[0023] If the X dimension 84 is in the range of 148.0 mm to 152.0 mm (e.g., 150.0 mm), the Y dimension 90 is in the range of 15.0 mm to 16.0 mm (e.g., 15.5 mm), and the pilot projection diameter 88 is in the range of 112.0 mm to 115.0 mm (e.g., 113.45 mm), the displacement fan motor capacity may be 25 ~ 50 cc / rev. Other capacities and dimensions are possible in other embodiments of the present disclosure.

[0024] With such dimensions and volumes, the shaft 58 can transmit torques exceeding 500 N / m (Newton - meter). As best shown in FIG. 5, an O - ring 92 configured to fit with the pilot projection 86 may be provided. This O - ring 92 may define an inner diameter 94 in the range of 104.0 mm to 108.0 mm (for example, 107.62 mm). Further, the cross - sectional diameter 95 of the O - ring 92 can be made smaller than the width 97a of the seal - receiving slot 97 that extends in the circumferential direction of the pilot projection 86.

[0025] As shown in FIG. 5, the pilot projection 86 may be integral, and the O - ring 92 needs to expand and slide along the free end of the pilot projection until it is positioned within the groove 97. However, in other embodiments, in order to simplify the installation of the O - ring 92, it is conceivable that the pilot projection 86 may be split by the groove 97 (dividing the projection into two parts along the radial direction). In such an embodiment, after the O - ring 92 is installed in the groove 97, the end of the pilot projection is clamped to the remaining part of the pilot projection.

[0026] To help withstand the increased torque, a pair of M14 bolts 96 (see FIG. 4) may longitudinally penetrate each of a pair of bolt - receiving slots 80 used to attach the pump to the fan assembly. Also, in the housing 60, in some embodiments, it is in fluid communication with the inlet or outlet of the cavity 70 and / or the manifold cap 62, while in other embodiments, a capacity control valve or volume - limiting mechanism 98 (see FIG. 3) that is not in fluid communication with the inlet or outlet of the cavity 70 and / or the manifold cap 62 may be attached.

[0027] Similarly, to control the operation of the motor, a solenoid valve assembly 100 in fluid communication with the cavity 70 and / or the manifold cap 62 may be attached to the housing 60.

[0028] The housing and the manifold cap can be cast or molded from any suitable material including, but not limited to, steel, aluminum, iron, and thermoplastic.

[0029] The dimensions, configurations, materials, etc. described herein may be changed as necessary or may be different from the values or characteristics specifically mentioned herein or shown in the drawings for any embodiment.

[0030] Here, a hydraulic pump or motor having a mounting configuration that mates with a female mounting member to provide an assembly corresponding to the increased torque described above in this specification will also be described. It should be understood that this assembly may have the characteristics, properties, dimensions, and ratios of the aforementioned assemblies mentioned in this specification, even if not explicitly shown in the drawings.

[0031] As shown in FIGS. 6 - 8, the assembly 200 may include a shaft 202 defining a longitudinal axis 204, a Y - axis 206 extending orthogonally upward from the longitudinal axis 204, and an X - axis 208 extending orthogonally to the longitudinal axis 204 and the Y - axis 206.

[0032] The housing 210 may define a first longitudinal end 212 and a second longitudinal end 214. Although not shown in FIGS. 6 - 8, there may be a cavity extending from the first longitudinal end 212 toward the second longitudinal end 214, and this cavity can accommodate a plurality of mechanical parts including one hydraulic interaction part, as previously shown and described with respect to FIG. 3, and it should be understood.

[0033] As shown in FIG. 7, the shaft 202 extends beyond the first longitudinal end 212 of the housing 210 from the cavity, and the mantel flange 216 may be disposed at the first longitudinal end 212.

[0034] As best shown in FIG. 8, the mantle flange 216 may define a pair of bolt receiving slots 218 disposed on both sides of the shaft 202 along the X-axis. Each of the pair of bolt receiving slots 218 defines a radius center 220 spaced apart from each other by an X dimension 222, and the pilot projection 224 may extend longitudinally from the mantle flange 216 so as to define a pilot projection diameter 226. The ratio of the X dimension 222 to the pilot projection diameter 226 is in the range of 1.1 to 1.5.

[0035] The housing 210 may be attached to a female mounting member 300 that defines a pilot projection receiving cavity 302 that mates with the pilot projection 224 (see FIG. 7). As shown in FIG. 2 and as previously described herein, it has a first screw hole 304 aligned with the radius center 220 during assembly and a second screw hole 304a for receiving a fastener aligned with the radius center 220 during assembly.

[0036] In some embodiments, the ratio of the X dimension to the pilot projection receiving cavity is also in the range of 1.1 to 1.5. In this case, the displacement of the hydraulic pump or motor may be in the range of 25 ~ 50 cc / rev, the X dimension may be in the range of 148.0 mm to 152.0 mm, and the pilot projection diameter may be in the range of 112.0 mm to 115.0 mm. Thereby, the shaft may receive or transmit a torque exceeding 500 N / m. In other embodiments of the present disclosure, other ranges of ratios and dimensions may be used to allow for different amounts of torque capacity and the like.

[0037] Referring back to FIG. 5, any of the embodiments may have a pilot projection 86 that defines a free end 228 and an O-ring groove (see, for example, 97) that is longitudinally spaced from the free end 228. The chamfer 230 may extend from the free end 228 toward the O-ring groove. This chamfer 230 may be spaced apart by a minimum longitudinal distance 231 in the range of 1.0 mm to 1.4 mm (for example, 1.2 mm) from the O-ring groove. The O-ring groove (see, for example, 97) may define a groove diameter in the range up to 108.0 mm to 111.0 mm (for example, 109.5 mm) (see, for example, 94) and a groove axial width in the range up to 3.4 mm to 3.7 mm (for example, 3.58 mm) (see, for example, 97a). After assembly, an O-ring can be placed in the O-ring groove to prevent leakage. The pilot projection may define an overall length 232 in the range of 10.0 mm to 11.0 mm (for example, 10.5 mm).

[0038] Similarly, any of the embodiments described herein may use materials, features, ratio ranges, or dimensions different from those described herein.

Industrial Applicability

[0039] In practice, an engine assembly, a hydraulic fan motor assembly, a female mounting member, and / or a hydraulic pump assembly constructed according to any of the embodiments disclosed herein may be available for sale, purchase, manufacture, or other means in an OEM (Original Equipment Manufacturer) or aftermarket environment. In some cases, various components such as an engine assembly, a hydraulic fan motor assembly, a hydraulic pump assembly, etc. are included. It may be provided as a kit for repairing or modifying machinery on-site.

[0040] Furthermore, referring to FIGS. 3 and 4, embodiments of a hydraulic pump or hydraulic motor that can be assembled to an existing engine and / or machine will be described in detail. This unexpectedly breaks the trade-off between size / cost and torque (and cooling efficiency) described above herein.

[0041] It should be understood that the motor component can also be used as a pump by reversing the flow of the hydraulic fluid and supplying torque to the shaft to pressurize the fluid instead of receiving torque from the shaft.

[0042] A plurality of mechanical components (such as pistons, vanes, swash plates, etc.) including one hydraulic interaction component (for example, refer to line 71) arranged in the housing. A plurality of mechanical components (such as pistons, vanes, swash plates, etc.) including one hydraulic interaction component (for example, refer to line 71) arranged in the housing. The mantle flange 78 may define a pair of bolt receiving slots 80 arranged on both sides of the shaft along the X-axis, and each bolt receiving slot 80 may define a radius center 82 spaced apart from each other by an X dimension 84. In some embodiments of the present disclosure, the pilot protrusion 86 may extend longitudinally away from the mantle flange 78 and define a pilot protrusion diameter 88, and the ratio of the X dimension 84 to the pilot protrusion diameter 88 may be in the range of 1.1 to 1.5 (for example, 1.3).

[0043] Also, in some embodiments of the present disclosure, the ratio of the X dimension 84 to the Y dimension 90 may be in the range of 9.6 to 9.8 (for example, 9.67). The hydraulic pump or motor is 25 ~ It has a capacity of 50 cc / rev, the X dimension 84 is in the range of 148.0 mm to 152.0 mm (for example, 150.0 mm), the Y dimension 90 is in the range of 15.0 mm to 16.0 mm (for example, 15.5 mm), and the pilot protrusion diameter 88 is in the range of 112.0 mm to 115.0 mm (for example, 113.45 mm).

[0044] As a result of this configuration, the shaft 58 can receive or transmit torque exceeding 500 N / m.

[0045] Such a hydraulic pump or hydraulic motor (e.g., hydraulic fan motor assembly 48) according to yet another embodiment of the present disclosure may include a shaft 58, a housing 60, and a manifold cap 62, as described earlier herein.

[0046] This embodiment may further be characterized in that the ratio of the X dimension 84 to the Y dimension 90 is in the range of 9.5 to 9.8 (e.g., 9.67), and the ratio of the pilot projection diameter 88 to the Y dimension 90 is in the range of 7.3 to 7.5 (e.g., 7.4).

[0047] In such an embodiment, the hydraulic pump or motor is 25 ~ It may have a displacement of 50 cc / rev, the X dimension is in the range of 148.0 mm to 152.0 mm, the Y dimension 90 is in the range of 15.0 mm to 16.0 mm, and the pilot projection diameter may be in the range of 112.0 mm to 115.0 mm, as described herein.

[0048] This embodiment may also have a shaft 58 that can receive or transmit a torque exceeding 500 N / m.

[0049] In addition, the female mount member may be supplied as a replacement part. It should be understood that in various other embodiments of the present disclosure, the features of the female mount member are interchangeable with the corresponding features of the housing, and vice versa.

[0050] Such a female mount member can be described as follows with reference to FIGS. 9 and 10. The female mount member may include a body defining a protruding receiving cavity 302 that defines a cavity diameter D302 and a first threaded hole 304 that defines a first threaded hole diameter D304. The ratio of the cavity diameter D302 to the first threaded hole diameter D304 may be in the range of 8.0 to 8.15.

[0051] In such an embodiment, the cavity diameter D302 may be in the range of 112.0 mm to 115.0 mm (for example, 114.0 mm), and the first screw hole diameter D304 may be in the range of 13.0 mm to 15.0 mm (for example, 14.0 mm).

[0052] As shown in FIG. 10, the cavity 302 can extend completely through the body, but this is not necessarily the case.

[0053] In a particular embodiment, the first screw hole 304 is an M14 tap hole with a depth of 30.0 mm. In other embodiments of the present disclosure, this may not be the case. The second screw hole 304a (which may be configured similarly or identically to the first screw hole) may be spaced apart by a minimum center-to-center distance 306. In some embodiments of the present disclosure, the ratio of the minimum center-to-center distance to the cavity diameter D302 may be in the range of 1.30 to 1.35. In this case, the minimum center-to-center distance 306 may be in the range of 140.0 mm to 160.0 mm (for example, 148.0 mm to 152.0 mm, with a nominal value of 150.0 mm).

[0054] Any of the foregoing features may have a configuration different from those previously described, or different ratios and dimensions. The female mounting member can be manufactured from any suitable material as previously described herein with respect to the housing and the like.

[0055] As will be apparent to those skilled in the art, various modifications and changes can be made to the embodiments of the apparatus and assembly method discussed herein without departing from the scope or spirit of the invention. Other embodiments of the present disclosure will be apparent to those skilled in the art upon consideration of the specifications and practices of the various embodiments disclosed herein. For example, some devices may have a different configuration and function than those described herein, certain steps of any method may be omitted, may be performed in a different order than that specifically recited, and in some cases may be performed simultaneously or in sub-steps. Further, specific aspects or features of the various embodiments may be changed or modified to create additional embodiments, and features and aspects of the various embodiments may be added to, or substituted for, other features or aspects of other embodiments to provide further embodiments.

[0056] Accordingly, the specification and examples are to be considered only as illustrative, and the true scope and spirit of the invention are intended to be indicated by the following claims and their equivalents.

Claims

Claim 1 A hydraulic pump (48) or motor (46) having a mounting configuration for increased torque, comprising: A shaft (58) defining a longitudinal axis (64), a Y-axis extending orthogonally upward from the longitudinal axis (64), and an X-axis extending orthogonally to the longitudinal axis (64) and the Y-axis; A housing (60) defining a first longitudinal end (66), a second longitudinal end (68), and a cavity (70) extending from the first longitudinal end (66) to the second longitudinal end (68); A plurality of mechanical components (71) including one hydraulic interaction component disposed within the cavity (70); A manifold cap attached to the second longitudinal end (68) and defining an inlet (72) and an outlet (74); and The shaft (58) extends from the cavity (70) beyond the first longitudinal end (66) of the housing (60), and a mount flange (78) is disposed at the first end of the housing (60). The mount flange (78) defines a pair of bolt-receiving slots (80) disposed on both sides of the shaft (58) along the X-axis. Each of the pair of bolt-receiving slots (80) defines a radius center (82) spaced from each other by an X dimension (84) and a pilot projection (86) extending longitudinally away from the mount flange (78) and defining a pilot projection diameter (88). The ratio of the X dimension (84) to the pilot projection diameter (88) is in the range of 1.1 to 1.

5. A hydraulic pump (48) or motor (46). Claim 2 The hydraulic pump (48) or motor (46) having a mounting configuration for increased torque according to claim 1, wherein each of the pair of bolt-receiving slots (80) defines a Y dimension (90), and the ratio of the X dimension (84) to the Y dimension (90) is in the range of 9.6 to 9.

8. Claim 3 The hydraulic pump (48) or motor (46) having a mounting configuration for increased torque according to claim 2, wherein the hydraulic pump (48) or motor (46) has a capacity of 25 to 50 cc / rev, the X dimension (84) is in the range of 148.0 mm to 152.0 mm, the Y dimension (90) is in the range of 15.0 mm to 16.0 mm, and the pilot projection diameter (88) is in the range of 112.0 mm to 115.0 mm. Claim 4 The shaft (58) is a hydraulic pump (48) or a motor (46) with a mounting configuration for increased torque according to claim 3, which receives or transmits a torque exceeding 500 N / m.

5. The plurality of mechanical components (71) including one hydraulic interaction component disposed within the housing (60) is a hydraulic pump (48) or a motor (46) with a mounting configuration for increased torque according to claim 1, and includes at least one of a vane, a piston, and a swash plate.

6. A hydraulic pump (48) or a motor (46) with a mounting configuration for increased torque, a shaft (58) defining a longitudinal axis (64), a Y-axis extending orthogonally upward from the longitudinal axis (64), and an X-axis extending orthogonally to the longitudinal axis (64) and the Y-axis; a housing (60) defining a first longitudinal end (66), a second longitudinal end (68), and a cavity (70) extending from the first longitudinal end (66) to the second longitudinal end (68); a plurality of mechanical components (71) including one hydraulic interaction component (71) disposed within the cavity (70); and a manifold cap attached to the second longitudinal end (68) and defining an inlet (72) and an outlet (74). The shaft (58) extends from the cavity (70) beyond the first longitudinal end (66) of the housing (60), and a mount flange (78) is disposed at the first longitudinal end (66) of the housing (60). The mount flange (78) defines a pair of bolt-receiving slots (80) disposed on both sides of the shaft (58) along the X-axis. The pair of bolt-receiving slots (80) each define a radius center (82) spaced apart from each other by an X dimension (84) and a Y dimension (90) defining the width of the pair of bolt-receiving slots (80). The ratio of the X dimension (84) to the Y dimension (90) is in the range of 9.5 to 9.

8. A hydraulic pump (48) or a motor (46).

7. The mounting flange (78) further defines a pilot projection (86) that defines a pilot projection diameter (88), and the ratio of the pilot projection diameter (88) to the Y dimension (90) is in the range of 7.3 to 7.

5. The hydraulic pump (48) or motor (46) having a mounting configuration for increased torque according to claim 6.

8. The hydraulic pump (48) or motor (46) has a capacity of 25 to 50 cc / rev, the X dimension (84) is in the range of 148.0 mm to 152.0 mm, the Y dimension (90) is in the range of 15.0 mm to 16.0 mm, and the pilot projection diameter (88) is in the range of 112.0 mm to 115.0 mm. The hydraulic pump (48) or motor (46) having a mounting configuration for increased torque according to claim 7.

9. The shaft (58) receives or transmits a torque exceeding 500 N / m. The hydraulic pump (48) or motor (46) having a mounting configuration for increased torque according to claim 8.

10. The plurality of mechanical components (71) including one hydraulic interaction component disposed within the housing (60) includes at least one of a vane, a piston, and a swash plate. The hydraulic pump (48) or motor (46) having a mounting configuration for increased torque according to claim 6.

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