Transmission for pumps

A pump transmission for a pump having a pump shaft and an input gear for causing rotation of said pump shaft comprising:

• a housing mounted adjacent the pump input gear having first and second spaced apart wall means,
• an input member rotatably mounted in said housing and including a splined shaft portion, a cylindrical shaft portion and an input flange portion,
• first rolling bearing means positioned between said first housing wall means and said input member cylindrical shaft portion for rotatably supporting said input member in said housing,
• an output member rotatably mounted in said housing in axial alignment with said input member and including a splined shaft portion, a cylindrical shaft portion and an output flange portion,
• second rolling bearing means positioned between said second housing wall means and said output member cylindrical shaft portion for rotatably supporting said output member in said housing,
• said splined portions of said input member and said output member being axially aligned and having the same tooth configuration,
• said input member and said output member being rotatably mounted to rotate on an axis spaced from and adjacent to the axis of rotation of the pump input gear,
• a sliding gear slidably mounted on said splined shaft portion of said input member at an internal splined portion thereof and having externally facing gear teeth,
• said sliding gear being constructed and arranged to cooperate with said splined shaft portions of said input member and output member to slide between a road position wherein said internal splined portion thereof is in engagement with both the splined shaft portions of said input member and said output member and a pump position wherein said internal splined portion thereof only engages the splined shaft portion of the input member, the gear teeth of said sliding gear engaging the gear teeth of the pump input gear in said pump position of said sliding gear,
• said input flange being provided with a first annular pilot surface having a first series of circumferentially spaced bolt holes therein and arranged to provide a first bolt hole circle of a first diameter for use in attaching said input flange to a first transmission flange means, and a second annular pilot surface internally of said first pilot surface and having a second series of circumferentially spaced bolt holes formed therein and arranged to provide a second bolt hole circle of a second diameter for use in attaching said input flange to a second transmission flange means, said first diameter of said first bolt hole circle being larger than said second diameter of said second bolt hole circle whereby said input flange can be attached to two different size transmission flange means.

A pump transmission for a pump having a pump shaft and an input gear for causing rotation of said pump shaft comprising:

• a housing mounted adjacent the pump input gear having first and second spaced apart wall means,
• an input member rotatably mounted in said housing and including a splined shaft portion, a cylindrical shaft portion and an input flange portion,
• first rolling bearing means positioned between said first housing wall means and said input member cylindrical shaft portion for rotatably supporting said input member in said housing,
• an output member rotatably mounted in said housing in axial alignment with said input member and including a splined shaft portion, a cylindrical shaft portion and an output flange portion,
• second rolling bearing means positioned between said second housing wall means and said output member cylindrical shaft portion for rotatably supporting said output member in said housing,
• said splined portions of said input member and said output member being axially aligned and having the same tooth configuration,
• said input member and said output member being rotatably mounted to rotate on an axis spaced from and adjacent to the axis of rotation of the pump input gear,
• a sliding gear slidably mounted on said splined shaft portion of said input member at an internal splined portion thereof and having externally facing gear teeth,
• said sliding gear being constructed and arranged to cooperate with said splined shaft portions of said input member and output member to slide between a road position wherein said internal splined portion thereof is in engagement with both the splined shaft portions of said input member and said output member and a pump position wherein said internal splined portion thereof only engages the splined shaft portion of the input member, the gear teeth of said sliding gear engaging the gear teeth of the pump input gear in said pump position of said sliding gear,
• said second housing wall means extending for a substantial axial extent along said cylindrical shaft portion of said output member, said second rolling bearing means comprising a pair of roller bearings mounted in spaced apart relation in said second housing wall means for bearing contact with said cylindrical shaft portion of said output member at axial spaced locations thereon to provide bearing support of said output member against axial pivoting movement thereof in response to angular external loads thereon,
• said input member and said output member being provided with cooperating overlapping end portions and including a third bearing means between said end portions to provide bearing engagement between said input member and said output member at said overlapping end portions.
• said end portion of said output member comprising a cylindrical bore extending axially inwardly from the end thereof and said end portion of said input member comprising a cylindrical extension portion received in said cylindrical bore of said output member with said third bearing means therebetween, at least a portion of said thirdbearing means and said overlapping end portions being aligned radially with one of said roller bearings of said second rolling bearing means and with said second housing wall means whereby said third bearing means is supported by said second bearing means and said second housing wall means.