US1766583A - Power transmission unit for concrete mixers - Google Patents

Description

June'24, 1930. c. F. BALL 1,766,583

POWER TRANSMISSION UNIT FOR CONCRETE MIXERS Filed March 21, 1927 2 Sheets-Sheet 1 June 24,1930. c. F. BALL 1,766,583

POWER TRANSMISSION UNIT FOR CONCRETE MIXERS Filed March 21, 1927 2 Sheets-Sheet 2 amnion m CHARLES F. BALL, OF MILWAUKEE, WISCONSIN, ASSIGNOR T CHAIN BELT COMPANY,

Patented June 24, 1930 UNITED STATES PATENT OFFICE I OF MILWAUKEE, WISCONSIN, A. CORPORATION OF WISCONSIN POWER TRANSMISSION UNIT FOR CONCRETE MIXERS Application filed March 21, 1827. Serial No. 177,116.

This invention relates to power trans mission units for concrete mixers and has for one of its objects to provide a device of the character described which will be simple in construction, comparatively inexpensive to manufacture and install and more efiicient in use than those which have been heretofore proposed.

A further object of the invention is to provide a small and compact unitary transmission more especially adapted for use with concrete mixers provided with a power operated charging skip, which unit in cludes a protective casing for the gears, a sprocket or other drive wheel for transmitting power to the mixing drum, and a clutch controlled hoisting drum for operating the said charging skip.

A still further object of the invention is to provide a transmission for concrete mixers which because of its unitary construction may be readily removed as a unit from the mixer for the purpose of repair or replacement in the event of breakage of any of the arts.

lVith the above and other objects in view which will appear as the description proceeds, the invention consists in the novel de tails of construction and combinations of parts more fully hereinafter described and particularly pointed out in the appended claims.

Referring to the accompanying drawings forming a part of this specification in which like reference characters designate like parts in all the views:

Figure 1 is a diagrammatic side elevational view of one well known form of concrete mixer showing a transmission unit constructed in accordance with tlie present invention in place thereon;

Fig. 2 is a central horizontal sectional View on an enlarged scale through the trans mission unit detached from the mixer; and,

Fig. 3 is a vertical sectional elevational view taken approximately on the plane indicated by the line III-J11 of Fig. 2.

Referring more particularly to the said drawings, the numeral indicates generally, a concrete mixer of a well known form comprising a chassis 11 upon which is mounted an upright frame 12 and a mixing drum 13 which is adapted to be supplied with materials for producing concrete by means of a vertically swingingcharging skip 14. The said skip it is raised and lowered by means of cables 15 attached thereto, which cables run upwardly and pass around suitable drums 16 carried by a winding shaft 17 which shaft is also provided with a large driving wheel 18 about which is wound an actuating cable 19. The parts thus far described are all of well known construction and arrangement and the mixing drum 13 as well as the charging skip ll are normally actuated through power supplied by a gasoline or other motor enclosed within a housing 20.

The transmission unit constituting the present invention is designed to transmit the power from the motor within the housing 20 to the cable 19 which actuates the skip 14; and also to the mixing drum 13. As, will be clear from the drawings, this said unit comprises a casing or housing 21, which is preferably formed of two complementary sections 22 and 23 which are secured together by suitable bolts 24:.v The said casing 21 is sopositioned as to receive one end of'the power shaft 25 of the motor which shaft is provided with a spur pinion 26 mounted within the casing 21, (see Fig. 2) and meshing with an intermediate or idler gear 27 carried by a jack shaft 28 which is preferably mounted in ball or other anti-friction bearings-29 housed in the casing sections 22 and 23, as will be readily understood. The end of the power shaft 25 is covered by a cap 39 removably secured to the section 22 of the gear housing.

The jack shaft 28 carries apinion'30 which meshes with a gear 31 rigidlymounted upon a counter shaft 32 which counter shaft is journalled in the projecting bearing sleeves 33 and 34 which are detachably carried by the casing sections 22 and 23 respectively, as will be clear from Fig. 2. The said counter shaft 32 carries at one end and adjacent the bearing sleeve 33, a sprocket 35 which serves vas the driving means for the sprocket chain that passes around and engages the sprocket ring carried by the mixing drum 13. The sprocket wheel 35 is put into driving connection with the countershaft 32 through a clutch, represented in Fig. 2,. that is operated through clutchwshifting' mechanism. 42, this shifting mechanism in turn being under manual control through a lever 41. This manner of driving the drum is well known and is not herein claimedi A winding drum 36 is journalled upon the stationary bearingsleeve 34:- and is pro vided with a suitable clutch 37 which may be controlled by a clutch lever 38 in the usual manner to connect and disconnect the drum 36 from the counter shaft 32. The said drum 36 receives the lower end of the cable 19 which is secured thereto so. that rotation of the drum 36 will produce corresponding rotation of the shaft 17 through the cable 19 and wheel 18 and thereby raise the charging skip 1-1.

It will be noted that the drum 36 is journalled upon the outer surface of the stationary bearing sleeve 34 which eliminates undue wear in this journal since there is no relative movement of the parts except when the skip is being raised or lowered; whereas when the drum is loosely journalled upon the continuously revolving countershaft IShIIS been heretofore the case, there is constant wear between these parts. It will also be readily apparent that in the case of breakage or the derangement of any of the rtsof the transmission, that it may be and quickly removed as a unit for repair or replacement by merely disconnecting the cable 19 and the drum driving chain 35 and removing the bolts which secune the unit in place upon the engine housing.

It Wlll also be noted that through the use of this transmission, the location of the counter shaft 32 may be lowered thereby bringing the controls within easy reach of the operator as he stands upon the ground.

While one form of the invention has been thus illustrated and described, it is obvious that. those skilled in the art may vary the details of construction as well as the pree'so arrangements of parts without departin; from. the. spirit of the invention and therefore, it is not wished to be limited to the above disclosure except as may be. reqpined the claim.

What is claimed is:

i A power transmission unit for concrete mixers comprising a casing; readily detachable beaming sleeves carried by said casing; aicountershaft journalled in said sleeves; a gear: train housed in said casing, adapted to transmit. power from a source to said oountershait; a sprocket carried by said eonntershatt adjmnt one of said sleeves for

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