US1418154A - Front truck for street-sweeping machines - Google Patents

Description

c. w. LUND.

FRONT TRUCK FOR STREET SWEEPING MACHINES. APPL iCATION FILED MAR. 10. 1921.

1,418, 1 54. Patented May 30, 1922.-

. 3 SHEETS-SHEET l.

I :hE-z-l egmm w. W :5,

C. W. LUND.

APPUCATION FILED MAR. l0 192i.

Patented May 30, 1922.

s SHEETS-SHEET 2.

O O I O I i o M Q] C. W. LUND.

v FRONT TRUCK FOR STREET SW EEPING MACHINES.

APPUCATION FILED MAR- I0. 192].

Patented May 30, 1922.

3 SHEETS-SHEET 3.

starts @NETE CALIFORNIA.

FRONT TRUCK FOR STREET-SWEEPING MACHINES.

iaisdaa.

Original application filed. April 11, 1819, Serial No. 289,326.

Specification of Letters Patent.

Patented MaySU, 1922." Divided and this application filed March 10, 1921. Serial No. 451,150.

To all whom it may concern:

Be it known that I,,CI-IARLns IV. LUND, a citizen-of the United States, residing at lVillows, in the county of Glenn and State of California, have invented certain new and useful Improvements in Front Trucks for Street-Sweeping Machines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This application is a division of my allowed U. application, Serial No. 289,326 filed April 11, 1919, and for a full description of any details of construction not herein specifically described, reference may be had to this parent case.

The principal object of my invention is to provide a novel form of truck for supporting the front end of a street sweeping machine in such a manner as to permit the front wheels todrop into depressions and ride over projections without elevating or lowering the entire front of the machine and without exerting any torsional or twisting action thereon. In carrying out this object, I make use of several novel features of construction andunique arrangements of parts, as hereinafter. fully described and claimed, the descriptive matter being supplemented by the accompanying drawings.

Figure 1 is a side elevation of the street sweeping machine supported at its front end by the improved truck.

Figure 2 is a front elevation of the machine shown in Fig. 1.

Figure 3 is a side elevation partly broken away and in section, showing more clearly the construction of one of the trucks.

Figure 4 is a horizontal sectional view as indicated by line 4-4 of F ig. 3.

Figures 5 and 6 are vertical transverse sectional views as designated by lines 5-5 and 6-6 of Fig. 3.

In the drawings above briefly described, the numeral 1 designates the main body or housing of a motor driven street sweeping machine mounted on front and rear wheels 2 and 3, the front wheels being driven by any preferred means such as chains 8,while suitable provision is made for steering the rear wheels 3.

The front wheels 2 are mounted in trucks 12, one of which is detailed in Figs. 3 to 6. The front and rear brackets 13 and 13 respective'ly are rigidly secured to the sides of the housing 1 or to the frame of such hous ng as required, and each of said brackets includes a base let, an inner side bar 15 and an outer side bar 16, the two bars lti and 16 of each bracket being parallel throughout the greater part of their lengths and being by preference secured together at their upper ends as clearly shown'in F igs.

2, 5 and 6. Two parallel horizontal. bars 17 extend between the two brackets 13 and 13 and contact with the inner sides of the bars 15 and 16, and by means of a pin 18 passing through the front ends of said bars 17 and the bracket 13, the former are pivot ed. Spacing sleeves 19, mounted on' 1316. bolts 20, are preferably provided between the front ends of the bars 17 as illustrated'in Figs. 3and 4 and in addition, a U-shaped pin 18passes through the ends 23 and said" ends serve to guide the bars 17 in their pivotal movement upon the pin 18.

At their rear ends, nected by a U-shaped bar 24 vWhoseends are riveted thereto at 25 (see Fig. 5). Thejbar' 21 and the base 1 1 of the bracket I provided with alined openings through which vertical bolts 26 extend, said bolts rising above the bars 17 and carrying an abutment 27. Coil springs 28 are interposed between the abutment 27 and the bar 2st and it will thus be seen that since the wheel 2 is mounted between the bars 17, vertical movement of said wheel with respect to the remainder of the machine is yieldably resisted by the springs 28. The front end of the machine is thus mounted in avmanner to permit the front wheels to drop into depressions or ride over obstructions, without warping or exerting a torsional action on the entire machine. The rear end of the machine is supported yieldably by means of springs 29 from the axle 30 of the wheels 3, and these parts are preferably located beneath the .rearwardly projecting portion 31 of the housing 1.

From the foregoing, taken in connection with the accompanying drawings, it will be seen that I have provided a comparatively the bars 17 are con sults are obtainable from simple truck structure for carrying out the object of the invention, yet that the arrange 7 sides of said side bars, a wheel mounted bebars, the latter being tween said horizontal pivoted to the side bars of one of said brackets, a transverse bar connecting the ends of said horizontal bars in the other bracket, a bolt rising from the base of said other bracket through an opening in said transverse bar, said bolt having an abutment spaced above saidf transverse bar, and a coiled spring interposed between said'abutment and said transverse bar.

2. Ina truck, front and rear fixed brackets, one of which includes a base and parallel vertical side bars rising therefrom, a pair of parallel horizontal, bars extending between said brackets and contacting with the inner sides of said side bars, a wheel mounted between said horizontal bars, means pivoting said horizontal bars to said side bars, a transverse bar secured to the base of said one bracket and having upturned ends contacting withthe inner sides of said horizontal bars, and spring means associated with the other bracket and horizontal bars for yieldably controlling the movement of the latter about their pivotal axis.

3. In a truck, front and rear fixed brackets, one of which includes a base and vertical side bars rising therefrom, a pair of horizontal bars pivoted to the other bracket and positioned in sliding contact with the inner surfaces of said side bars, a transverse bar extending between said parallel bars and having its ends bent upwardly and secured to the latter, said transverse bar being positioned over said base, a bolt rising from'said base through an opening in said transverse bar, said bolt having an abutment above said transverse bar, a coil spring interposed between this transverse bar and said abutment, and a wheel mounted between said horizontal bars.

a. In a truck, front and rear fixed brackets each including a base and parallel, vertical side bars rising therefrom, a pair of parallel horizontal bars extending between said brackets and contacting with the inner sides of said side bars, a wheel mounted between said horizontal bars, a pivotpin connecting the front ends of said horizontal bars with the side bars of said front bracket,

spacing means for said front ends of said horizontal bars, a transverse bar bent into U-shape with its upturned ends secured to the rear ends of said horizontalbars, bolts passing through openings in the base of the rear bracket and in said U-shaped bar, and rising above the latter, an abutment on the upper ends offsaid bolts and coiled springs letween said abutment and said Ushaped CHARLES WALTER LUNDi 5. A structure as specified in claim l, said spacing means consisting of a U-shaped bar

Images