Mixer paddle assembly and drive system
First Claim
1. In a mixer having a drum, a paddle shaft having a plurality of paddles thereon, and means journaling the paddle shaft for rotation mixing material in the drum, that improvement comprising a rive assembly for driving said paddle shaft at a slow rotational speed including a large driven gear connected to the paddle shaft, a small driving gear meshed with the large gear, a power device having an output shaft driven at a high speed, and a speed reduction assembly interconnecting the output shaft and small driving gear, said speed reduction assembly including coplanar small and large pulleys and an encircling belt and coplanar small and large sprocket gears and an encircling chain arranged in series relationship.
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Accused Products
Abstract
A plaster or mortar mixer embodying a stub shaft mounting assembly for the mixer paddles disposed interiorly of the mixing drum and a reduction gear drive system enabling use of a standard electric motor or universal internal combustion engine with the reduction drive system employing a belt and pulleys, a sprocket chain and sprocket gears and a meshing gear assembly which eliminates the necessity of a relatively expensive reduction gear unit thereby rendering the mixer less expensive to manufacture and maintain. The stub shaft mounting of the mixer paddles enables the paddles to be permanently and rigidly secured to the paddle shaft in the form of a supporting tube such as by welding or the like with the stub shafts detachably connected to the tube in order to facilitate the removal of and replacement of the paddles and tube.
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Citations
7 Claims
- 1. In a mixer having a drum, a paddle shaft having a plurality of paddles thereon, and means journaling the paddle shaft for rotation mixing material in the drum, that improvement comprising a rive assembly for driving said paddle shaft at a slow rotational speed including a large driven gear connected to the paddle shaft, a small driving gear meshed with the large gear, a power device having an output shaft driven at a high speed, and a speed reduction assembly interconnecting the output shaft and small driving gear, said speed reduction assembly including coplanar small and large pulleys and an encircling belt and coplanar small and large sprocket gears and an encircling chain arranged in series relationship.
- 3. In a mixer having a pivotally supported drum, a paddle shaft extending longitudinally of the drum and including paddles thereon, means disposed exteriorly of the drum for driving the paddle shaft, that improvement comprising shaft means connected with the paddle shaft and forming longitudinal extensions thereof, said shaft means being journaled in the opposite walls of the drum and being accessible exteriorly of the drum, and means detachably connecting the shaft means with the paddle shaft to enable separation of the shaft means from the paddle shaft and removal of the paddle shaft and paddles from the drum without removing the drum from its support, said shaft means being in the form of a pair of stub shafts, each of said stub shafts being connected with an end portion of the paddle shaft closely adjacent to but spaced from the opposite walls of the drum, said stub shafts extending exteriorly of the drum for longitudinal removal of the stub shafts when the inner ends of the stub shafts are disconnected from the end portions of the paddle shaft, said paddles being rigidly and permanently secured to the paddle shaft, the opposite walls of the drum having external bearing assemblies journaling the drum for pivotal movement about a longitudinal axis concentric with the rotational axis of the paddle shaft with the bearing assemblies enabling insertion and removal of the stub shafts longitudinally in relation to the end portions of the paddle shaft.
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7. In a mixer having a pivotally supported drum provided with opposed end walls, a paddle shaft extending longitudinally of the drum and including paddles thereon, the opposed end walls of the drum having external bearing assemblies journaling the drum for pivotal movement about a longitudinal axis concentric with the rotational axis of the paddle shaft, means disposed exteriorly of the drum for driving the paddle shaft, that improvement comprising shaft means connected with the paddle shaft and forming longitudinal extensions thereof, said shaft means being journaled in the bearing assemblies on the opposed end walls of the drum and being accessible exteriorly of the bearing assemblies, and means detachably connecting the shaft means with the paddle shaft to enable separation of the shaft means from the paddle shaft, said bearing assemblies enabling insertion and removal of the shaft means longitudinally in relation to the paddle shaft and bearing assemblies thereby enabling removal of the paddle shaft and paddles from the drum without removing the drum from its support.
Specification