公开(公告)号：US10371225B2

公开(公告)日：2019-08-06

申请号：US15445599

申请日：2017-02-28

Applicant: Harnischfeger Technologies, Inc.

Inventor： James R. Popp ,  Richard Nicoson ,  Dave Schob

IPC: F16F9/14 ,  E02F3/30 ,  E02F3/342 ,  E02F3/407 ,  E02F3/40

Abstract: A damper for dampening rotation of a dipper door relative to a dipper body of a mining shovel includes a shaft, an arm, and a high pressure fluid seal. The shaft supported for rotation about a shaft axis, and rotation of the shaft is dampened by fluid in an enclosed chamber. The high pressure fluid seal engages an outer surface of the shaft at a position between the first end of the shaft and the second end of the shaft. The high pressure fluid seal engages an outer surface of the shaft and includes a low pressure side and a high pressure side adjacent a shaft cavity. The arm includes a first end coupled to the first end of the shaft, and a second end coupled to the dipper door or the dipper body such that rotation of the dipper door drives the arm to rotate the shaft.

公开(公告)号：US20180087593A1

公开(公告)日：2018-03-29

申请号：US15445599

申请日：2017-02-28

Applicant: Harnischfeger Technologies, Inc.

Inventor： James R. Popp ,  Richard Nicoson ,  Dave Schob

IPC: F16F9/14 ,  E02F3/30 ,  E02F3/342 ,  E02F3/407

CPC classification number: F16F9/145 ,  E02F3/301 ,  E02F3/342 ,  E02F3/401 ,  E02F3/4075 ,  F16F2230/30

Abstract: A damper for dampening rotation of a dipper door relative to a dipper body of a mining shovel includes a shaft, an arm, and a high pressure fluid seal. The shaft supported for rotation about a shaft axis, and rotation of the shaft is dampened by fluid in an enclosed chamber. The high pressure fluid seal engages an outer surface of the shaft at a position between the first end of the shaft and the second end of the shaft. The high pressure fluid seal engages an outer surface of the shaft and includes a low pressure side and a high pressure side adjacent a shaft cavity. The arm includes a first end coupled to the first end of the shaft, and a second end coupled to the dipper door or the dipper body such that rotation of the dipper door drives the arm to rotate the shaft.