Transmission pump adapter manifold for hydrostatic transmission

Patent metadata

Field	Value
Publication number	US-11662016-B1
Application number	US-202117205255-A
Country	US
Kind code	B1
Filing date	Mar 18, 2021
Priority date	Mar 23, 2020
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

A hydrostatic transmission subassembly for a vehicle includes an adapter manifold and a hydraulic pump mounted to the adapter manifold. The pump includes a pump housing and a pump porting manifold including pump porting for communicating fluid to and from the pump. The adapter manifold may include a mounting section adapted for mounting to the vehicle and a fluid interface section extending from the mounting section. The fluid interface section includes a pump interface having pump interface porting, in which the pump interface engages with the pump porting manifold to fluidly connect the pump interface porting with the pump porting. When the mounting manifold is mounted to the vehicle via the mounting section, the mounting manifold supports the hydraulic pump. The fluid interface section also includes a motor interface having motor interface porting for fluidly connecting to a motor, which enables the mounting manifold to fluidly connect the pump and motor.

First claim

What is claimed is:

1. A hydrostatic transmission subassembly for a vehicle, comprising:
a hydraulic pump assembly having:
a pump housing, and
a pump porting manifold including a pump porting interface having pump porting for communicating fluid to and from the hydraulic pump assembly; and

a mounting manifold having:
a mounting section adapted for mounting to the vehicle;
a fluid interface section extending from the mounting section, the fluid interface section including a pump interface having pump interface porting, and a motor interface having motor interface porting; and
one or more fluid passages extending between the pump interface porting and the motor interface porting for communicating fluid therebetween;

wherein the pump interface of the mounting manifold engages with the pump porting interface of the pump porting manifold, such that the pump interface porting is fluidly connected to the pump porting;
wherein, when the mounting manifold is mounted to the vehicle via the mounting section, the mounting manifold supports the hydraulic pump assembly;
wherein the pump interface porting includes a first pump interface port and a second pump interface port, and
wherein the pump interface includes a face groove and a seal disposed in the face groove, the face groove and seal being arranged to fluidly separate the first pump interface port from the second pump interface port.

2. The subassembly according to claim 1 , wherein the second pump interface port is at a radially inward location relative to the first pump interface port, which corresponds with the location of the pump ports of the porting manifold.

3. The subassembly according to claim 1 , wherein the face groove and the seal are a first face groove and first seal, the pump interface further including a second face groove and a second seal,
wherein the first face groove and the first seal radially outwardly surround the second pump interface port, and are located radially inwardly of the first pump interface port to provide fluid separation between the first and second pump interface ports, and
wherein the second face groove and the second seal are located radially outwardly of the first pump interface port to prevent fluid from escaping outwardly of the pump interface.

4. The subassembly according to claim 1 , wherein the first pump interface port is a high-pressure supply port that is configured to communicate high-pressure fluid from the hydraulic pump assembly to a hydraulic motor when the vehicle is operating in a forward direction; and wherein the second pump interface port is a low-pressure return port that is configured to communicate low-pressure return fluid from the hydraulic motor to the hydraulic pump assembly when the vehicle is operating in the forward direction.

5. The subassembly according to claim 1 , wherein the pump porting manifold and the mounting manifold each include fastening receivers that receive corresponding fasteners to mountingly secure the hydraulic pump assembly to the mounting manifold, and
wherein the fastening receivers of the mounting manifold are configured as threaded bores that threadably receive the fasteners.

6. The subassembly according to claim 1 , wherein the motor interface porting includes threads for threadably receiving fluid conduit for fluidly coupling the mounting manifold to a hydraulic motor.

7. The subassembly according to claim 1 , wherein the mounting manifold has a unitary body formed by the mounting section and the fluid interface section.

8. The subassembly according to claim 1 , wherein the mounting section includes a plurality of fastener receivers for receiving corresponding fasteners to mount the mounting manifold to the vehicle.

9. The subassembly according to claim 1 , wherein the hydraulic pump comprises: an input shaft; a piston rotating group; and a moveable swash plate; wherein the input shaft drives the piston rotating group such that pistons of the rotating group extend and contract against the swash plate to pump the hydraulic fluid.

10. A hydrostatic transmission, comprising:
the hydrostatic transmission subassembly according to claim 1 ;
a hydraulic motor mounted on a different portion of the vehicle separately from the mounting manifold; and
fluid conduits fluidly connecting motor ports of the hydraulic motor to the motor interface porting of the mounting manifold.

11. A method of assembling the hydrostatic transmission according to claim 10 to a vehicle, comprising:
(i) mounting a hydraulic pump assembly to a mounting manifold, wherein:
the hydraulic pump assembly includes a pump housing, and a porting manifold including a pump porting interface having pump porting for communicating fluid to and from the hydraulic pump; and
the mounting manifold includes: a mounting section adapted for mounting to the vehicle; a fluid interface section extending from the mounting section, the fluid interface section including a pump interface having pump interface porting, and a motor interface having motor interface porting; and one or more fluid passages extending between the pump interface porting and the motor interface porting for communicating fluid there between;
the pump interface of the mounting manifold engages with the pump porting interface of the pump porting manifold, such that the pump interface porting is fluidly connected to the pump porting; and

(ii) mounting the mounting manifold to the vehicle via the mounting section, such that the mounting manifold supports the hydraulic pump assembly.

12. A vehicle comprising:
a frame; and
the hydrostatic transmission subassembly according to claim 1 .

13. A hydrostatic transmission subassembly for a vehicle, comprising:
a hydraulic pump assembly having:
a pump housing, and
a pump porting manifold including a pump porting interface having pump porting for communicating fluid to and from the hydraulic pump assembly; and

a mounting manifold having:
a mounting section adapted for mounting to the vehicle;
a fluid interface section extending from the mounting section, the fluid interface section including a pump interface having pump interface porting, and a motor interface having motor interface porting; and
one or more fluid passages extending between the pump interface porting and the motor interface porting for communicating fluid therebetween;

wherein the pump interface of the mounting manifold engages with the pump porting interface of the pump porting manifold, such that the pump interface porting is fluidly connected to the pump porting;
wherein, when the mounting manifold is mounted to the vehicle via the mounting section, the mounting manifold supports the hydraulic pump assembly; and
wherein motor interface porting is directly opposite the pump interface porting such that the internal fluid passage is straight.

14. A hydraulic transmission subassembly for a vehicle, comprising:
a hydraulic pump assembly having:
a pump housing, and
a pump porting manifold including a pump porting interface having pump porting for communicating fluid to and from the hydraulic pump assembly; and

a mounting manifold having:
a mounting section adapted for mounting to the vehicle;
a fluid interface section extending from the mounting section, the fluid interface section including a pump interface having pump interface porting, and a motor interface having motor interface porting; and
one or more fluid passages extending between the pump interface porting and the motor interface porting for communicating fluid therebetween;

wherein the pump interface of the mounting manifold engages with the pump porting interface o

Assignees

• Parker Hannifin Corp

Inventors

• Richardson Jason S
• Edwards Kenneth D

Classifications

• F16H61/0009 Primary

  Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units · CPC title

• B60K17/10 Primary

  of fluid gearing · CPC title

• F16H57/0404

  Lubricant filters · CPC title

• B60Y2200/223

  Ridable lawn mowers · CPC title

• F16H39/02

  with liquid motors at a distance from liquid pumps · CPC title