Hydraulic power unit

Patent metadata

Field	Value
Publication number	US-9470269-B2
Application number	US-201313973522-A
Country	US
Kind code	B2
Filing date	Aug 22, 2013
Priority date	Aug 22, 2013
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A hydraulic power unit comprising a rear face and a front face spaced from one another includes an air inlet configured to receive air into the unit, and an air outlet configured to expel the air received into the unit. The hydraulic power unit further includes controls configured to provide a user interface. The controls and the air inlet are located on the front face, and the air outlet is located on the rear face. A coupler for a hydraulic power unit, configured to couple a drive shaft of the unit to a pump shaft of a hydraulic pump, includes a first aperture configured to receive the drive shaft, a second aperture configured to receive the pump shaft, and a hub configured to be received in a fan. The hub is configured to fixedly couple to the fan so that the fan is driven by the drive shaft.

First claim

What is claimed is:

1. A hydraulic power unit comprising:
a motor comprising a drive shaft;
a fan;
a hydraulic pump comprising a pump shaft; and
a coupler configured to couple the drive shaft to the pump shaft and the fan, the coupler comprising a first aperture, a second aperture, and a hub;
wherein the drive shaft is received in the first aperture, the pump shaft is received in the second aperture, and the fan is fixedly coupled to the hub and surrounds the hub.

2. The hydraulic power unit of claim 1 , further comprising:
a rear face and a front face spaced from one another by at least one side face
an air inlet configured to receive air into the hydraulic power unit;
an air outlet configured to expel the air received into the hydraulic power unit; and
controls configured to provide a user interface to the hydraulic power unit;
wherein the controls and the air inlet are located on the front face, and the air outlet is located on the rear face.

3. The hydraulic power unit of claim 2 , wherein the fan is located between the air inlet and the air outlet.

4. The hydraulic power unit of claim 2 , wherein the air outlet comprises radiator fins configured to radiate heat from hydraulic fluid utilized by the hydraulic power unit.

5. The hydraulic power unit of claim 2 , wherein the air inlet is aligned with the air outlet across the hydraulic power unit, creating an air flow path therebetween.

6. The hydraulic power unit of claim 2 , wherein the air outlet is recessed from a housing of the hydraulic power unit at the rear face of the hydraulic power unit.

7. The hydraulic power unit of claim 2 , further comprising a handle and one or more wheels to facilitate movement of the hydraulic power unit.

8. The hydraulic power unit of claim 7 , wherein the hydraulic power unit is configured to be supported on a support surface via the one or more wheels and a rest surface, and wherein lifting the hydraulic power unit by the handle lifts the rest surface from the support surface.

9. The hydraulic power unit of claim 1 , wherein the fan is an axial suction radial discharge fan.

10. The hydraulic power unit of claim 1 , wherein an axis of rotation for the fan is vertically oriented.

11. The hydraulic power unit of claim 1 , wherein the second aperture is configured to receive a block bushing therein, the block bushing configured to fixedly couple to the pump shaft.

12. The hydraulic power unit of claim 11 , wherein the second aperture and the block bushing are tapered outward facing the hydraulic pump.

13. The hydraulic power unit of claim 12 , wherein the block bushing is configured to compress to be received deeper into the second aperture.

14. The hydraulic power unit of claim 13 , wherein an outer perimeter of the coupler surrounding the second aperture is configured to receive a coupler nut.

15. The hydraulic power unit of claim 14 , wherein the outer perimeter of the coupler and an inner perimeter of the coupler nut are threaded, and wherein threaded engagement of the coupler nut and the coupler is configured to press the block bushing into the second aperture.

16. The hydraulic power unit of claim 1 , wherein the coupler comprises machined aluminum and the block bushing comprises steel.

17. The hydraulic power unit of claim 1 , wherein the drive shaft is configured to directly drive the hydraulic pump of the hydraulic power unit.

18. A coupler for a hydraulic power unit, the coupler configured to couple a drive shaft of the hydraulic power unit to a pump shaft of a hydraulic pump, the coupler comprising:
a first aperture configured to receive the drive shaft;
a second aperture configured to receive the pump shaft; and
a hub configured to be received in a fan;
wherein the hub is configured to fixedly couple to the fan so that the fan is driven by the drive shaft.

19. The coupler of claim 18 , further comprising a receiving groove extending from the first aperture, configured to receive a key portion of the drive shaft to fix rotation of the coupler to rotation of the drive shaft.

20. The coupler of claim 18 , further comprising a flange extending from the hub, the flange comprising one or more apertures configured to receive one or more fasteners to secure the fan to the coupler.

Assignees

• Stanley Black & Decker Inc

Inventors

• West Gabriel
• Weatherill Jeffery

Classifications

• F01P5/04 Primary

  Pump-driving arrangements · CPC title

• F02B63/06

  for pumps · CPC title

• F15B11/08

  with only one servomotor · CPC title

• F01P5/02

  Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers · CPC title

• F04B17/05

  driven by internal-combustion engines · CPC title