Vibratory compactor

• US 4,499,779 A
• Filed: 06/07/1982
• Issued: 02/19/1985
• Est. Priority Date: 06/07/1982
• Status: Expired due to Term

• Current Assignee: M-B-W Incorporated
• Original Assignee: M-B-W Incorporated
• Inventors: Maass, Helmut
• Primary Examiner(s): Braun, Leslie A.
• Assistant Examiner(s): Diehl, Dwight G.
• Application Number:
  US06/385,527
• Time in Patent Office: 988 Days
• Field of Search: 74/61, 74/87, 404/113, 404/117, 404/121, 404/133, 173/49
• US Class Current: 74/61
• CPC Class Codes: B06B 1/166 Where the phase-angle of masses mounted on counter-rotating shafts can be varied, e.g. variation of the vibration phase
• CPC Class Codes: Y10T 74/18344 Unbalanced weights

Abstract

A vibratory compactor having forward and reverse movement. The compactor comprises a bottom plate and a pair of standard, single shaft, vibration generating units are mounted in side-by-side relation on the bottom plate and each unit includes an eccentric shaft. The eccentric weight of one of the shafts can be varied in angular position with respect to the weight of the other shaft to provide both forward and reverse movement for the compactor. To adjust the angular position of one of the eccentric shafts, an axially slidable collar is splined to the eccentric shaft and a drive lug on the collar can be selectively engaged with a drive element on a drive gear or with a drive element on a ring which is fixed to the gear and spaced axially therefrom. The drive elements on the gear and the ring are displaced 180°. By moving the collar axially through a manual control, the drive lug will be disengaged with the drive element on the gear and will be engaged with the drive element on the ring. During this adjustment, the gear will advance 180° ahead of the eccentric shaft, thereby changing the angular position of the eccentric shaft with respect to the constantly rotating eccentric shaft to provide a reverse movement for the compactor.

Claims

1. In a vibration generating mechanism, a lease, a vibrating member, a pair of vibration generating units connected to the vibrating member and disposed in side-by-side relation in said base, each unit having an enclosed fixed housing and having an eccentric shaft journalled within the housing, said eccentric shafts being generally parallel and corresponding ends of said shafts projecting from the respective housings, gear train means operably connecting a power source to the projecting ends of said shafts to rotate said shafts in opposite directions, said gear train means including a pair of first gears connected to the projecting ends of the respective shafts and a pair of second gears interconnecting said first gears, a gear casing connected to said housing and containing said gear train means, a shift mechanism disposed within the gear casing and outside said fixed housings and operable to effect angular displacement of a first of said shafts relative to the other of said shafts to thereby provide an adjustment in the angularity of forces generated and reverse movement for said vibrating member, and operating means connected to the shift mechanism and disposed on the outside of said gear casing for manually operating said shift mechanism.

2. The mechanism of claim 1, wherein said gear means comprises a gear journaled about the projecting end of said first shaft and having a first driving element, a ring spaced axially from said gear and fixed to said gear and having a second driving element, and a shift member rotatably connected to said first shaft and axially movable relative to said first shaft, said shift member having a lug selectively engageable with said first and second drive elements, said operating means being connected to said shift member to move said shift member axially of said shaft and provide selective engagement of said lug with said driving elements.

3. The mechanism of claim 2, wherein the first driving element is displaced in a circumferential direction of said second driving element.

4. The mechanism of claim 3, wherein said first driving element is displaced approximately 180°

from said second driving element.

5. The mechanism of claim 2, wherein said operating means comprises a rod extending through an opening in said gear casing and operably connected to said shift member.