USRE16538E - Steering-wheel brake - Google Patents

Description

A. P. BRUSH STEERFNG WHEEL BRAKE m a J I Original Filed ec. 5. 1921 I nvcntoz 1 ALANsoN F2 BRu-sn invention to and which is provided with the Reissued Jan. 18, 1927.

UNITED STATES PATENT, OFFICE.

ALAnsoN 1?. BRUSH, OF DETROIT,

MICHIGAN.

STEERING-WHEEL BRAKE.

Original No.1.470,803, dated October 16, 1923.

reissue filed August 13,

The invention relates to brakes for use upon vehicle wheels swirelledupon their axles. as. for instance, the usual front wheel of 8.1110150! vehicle. It is the object of the obtain a simple construction which will not interfere with the free turn ing or pivoting of the wheel, and preferathl alsoqonein which the braking; reaction is taken care of independently of the axle An. important featureor' the invention rclatesto" relieving the kingpin of a front wheel of braking torque, by providing a novel anchor carried directly by the axle and engaged by a brake which swivels with the wheel about the king-pin. Preferably 1 the anchoris aroller bearing in line with the king-pin and engaged by the friction means of. the brake; I also consider it desirable that the brake should be applied by rneans which, at least when the brake is applied, is in glinement with the anchor; I The above and other features of the invention, including various novel combinations of parts'and desirable particular constructions,/will be apparentffrom the following y-ilescription of one illustrative embodiment shown in the accompanying drawing, in which:

Fig. 1 is a'front elevation of the axle and brake-mechanism, the latter being partly in section;

Fig. 2 is an Fig. 1:

elevation at right angles to g. 3 is a partial plan view showing the brake drum in angular relation to the operating lever.

Ais the stationary-axle such as con'nnonly used for the-lront'axle of a motor vehicle bifurcated bearings for thepirot C oi. the axle spindle D on which the wheel E is mounted. F is a brake drum mounted upon the wheel E which surrounds the lurcatious B and pivots C, andtr is a brake shoe arranged within said brake drum.

In the construction of brakes for use upon rear axles, it is usual to transmit the brake reaction into the axles through the medium of an anchor rigidly'attached to the axle.

Where, however, tl rigid anchor for the brake cannohhe -at tached to the stationary without interierence with end B forming the-pivotal action.

Serial No. 519,907, filed December 5, 1921.

core with the pivotal re axle is pivotal,.such aportion of the axlev Application for 1925. Serial No. 59120. On the other hand, if the anchor for the brake is attached to the pivotal portion of the axle, this causes the transmission hraltc reaction through the axle pivot. Inasmuch as this pivot considerablynearer the axis ol" the wheel than the brake. the force of the reaction is intensified and requiresexceptionally strong pivot to safely take care of the same.

To avoid the ditlicultics just described I have devised a construction in which the brake reaction iscarricd into the stationary axle without interference with the free pivotal action and also one in which the orake operating mechanism. is

action. I have ther devised an exceedingly simple construction of operating mechanism which is eil'ective when used in connection with steering H to provide clearance for bracket menu hers I and l" which arc. secured to the inner face of the shoe adjacent to opposite ends thereof. K and K are abutincnts which are adjnstahly secured in the brackets l: and l, prct'orahly lay being provided with threaded shanks ii and L engaging corresponding'ly threaded split. sockets in said brackets. said sockets being clamped upon the threaded shanks by screws M. N is an allotment. member stationary axle in alignment of the pivot U, living; preferably a roller hearing secured to one oi" the l'urcations B. in order to avoid the couiplications oii conventional operating devices for front; brakes, the brake is applicdhy a horizontallywinging: lcvcr 0, directly connected at its left end Fig. 1) to a. brake rod or other means operated. by the pedalor its equivalent. The lever O is fulcrumed near its w ith the axis ri ht end on the axle A, so that there is a considerable multiplication of power as the ot the forming; a rest for said shoe. The member H is cut away at ll and which is secured to the change the pressure on the brake.

tion of the spindle,

axis of the wheel forwardly to an active position in which. it is substantially in that axis.

That is, when the brake is applied, the axis of roller P is substantially coincident with the swivelling, axis of the wheel, so that the brake does notinterfere with swivelling the wheel, nor does swivelling the wheel Abutment K is adjusted from time to time to pie-- serve this relationship as the brake lining wears. The above-described brake control forms the subject-matter of my Patent No. 1,583,121, granted May 4, 1.926.

' 'l'n operation, the brake is set by a movement of the lever O which forces the brake shoe against the inner face of the brakedrum, while at the same time the wheel is free to turn upon the pivot G Without interference from the brake mechanism. This is for the reason that both the abutment N and the bearing P are in substantial alignment with the axis of the pivot, so that there will he no relative displacement by the turning of the wheel around Said pivot. On the other hand, all of the braking stress is transmitted directly into the stationary axle without any strain upon the pivot of the spindle.

\Vhat I claim as my invention is:

1. The combination with an axle having a spindle pivotally connected thereto, of a wheel mounted on said spindle, a brake drum on said wheel surrounding the pivotal connection of the spindle, brake shoe for engaging said brake drum supported by said spindle, and means for transmitting the braking reaction to the stationary portion of the axle independent of the pivotal connecsaid means including a roller in substantial alignment with the pivot of the spindle.

2. The combination with an axle having a spindle pivotally attached thereto, of a wheel mounted on said spindle, a brake drum on said wheel surrounding the pivotal connection of the spindle, a brake shoe for engaging said brake drum, a member mounted on said spindle forming a support for said brake shoe, an'anehor for said shoe connected lo the stationary portion of the axle, a pivot al engagement between said anchor and shoe independent of and in substantial alignment with the pivot for the spindle, and mechanism for applying the brake including a joint in substantial alignment with the pivot of the spindle, the pivotal connection and the joint including coaxial thrust rollers.

3. The combination with an axle, of a spindle pivotally attached thereto, a wheel mounted on said spindle, a brake drum on said wheel surrounding the pivotal connection of said spindle, a brake shoe within said drum, a member mounted on said spindle forming a support for said brake shoe, an anchor for said brake shoe secured to the anchor on said spindle forming stationar portion/of the axle and pivotally connected to said shoe in alignment with the pivot of said spindle, and a lever-for operating said therewith on the diametrically opposite side of the drum. P

4. The combination with an axle and a spindle pivotally connected thereto, of a wheel mounted on said s' indle, a drum on said wheel surrounding t e ivotaleonnection of said spindle, a brake s cc within said drum, a member mounted on said spindle forming a support for said brake shoe, an for said brake shoe connected to the stationary portion of the axle and pivotally connected to the shoe in alignment with the pivotof said spindle, a lever fuler'uined upon the stationary portion of said axle, and a pivotal connection between said lever and said shoe on the diametrically opposite side of the drum, said pivot being in substantial 1 axial alignment with the pivot of the spindle.

'5. The eombinationwith an axle having a shoe within said drum, :1 member mounted brake shoe, an anchor for sai pivotal] engaging one of said furcations in axial a ignment with spindle, alever fulerumed on the opposite furcation, and a pivotal engagement between said lever and said brake shoe;

6. The combination with an axle havin a bifurcated end portion, of a. spindle pivotsily secured between the furcations of said axle,- a wheel mounted on said spindle, a brake drum secured to said wheel and surrounding the pivotal connection of the spindle, a brake shoe within said drum, a member mounted on said spindle forming a support 'it'or said, brake-shoe, an anchor for one'end of said shoe pivotally secured to one of said furc'ations in alignment with the pivot of the spindle, a

lever fulcrumed on said axleon the dia-- metrically opposite side from said anchor, and a roller bearing on said lever insubstantialalignment with said pivotalbearing for the spindle, said roller engaging said brake shoe to apply the braking nressnre'thereto.

' -7. The'combination with anaxle'having a bifurcated end portion, of a spindle cona. support for said" brake "shoe i the pivot for the.

neeted between the intentions of said axle, a

wheel mounted on said spindle, a brake drum on said wheel surrounding the pivotal con motion of said spindle, a'brake shoe within said drum, :1 member mounted on saidjspin dle forming a support for saidbrakeshoe, a thrust lieu-ring for one'end of saidbrake shoe on said'stationary axle and concentric with the axis of said pivot, and a lever having a portion substant ally concentric with the '1 q s'as said drum, an abutment bearing on one end of said brake shoe, a bearing on'said stationary axle and concentric with the pivot of the spindle, said bearing engaging said abutment bearing of said shoe, a lever fulcrumed upon said stationary axle having a portion substantially concentric with the axis ot'said" pivot on the diametrically opposite side of the shoe, and an abutment bearing on said shoe for engaging said lever bearing.

The combination with an aide and a spindle ivotally attached thereto, of a Wheel Inounte on spindle, oralie tit-uni onv said Wilt-355i a brake shoe for enga n g said drum, a pressed sheet metai member mounted on. said spindie extending Within said brake shoe and when out of f1 onal engagement said drum, an actuat-ng member for said shoe having at ail times a tilted relation to the stationary axle, and coasting means whereby said actuating" member is operable to engage said brake shoe in all positions of adjustment of the spindle and Wheel, said actuating member and said enacting means being arranged to transmit the braking ie action to the stationary portion of said E1Zi independent of the pivotal connection'of the spindle.

In witness whereof I have hereunto signed lay-name.

ALANSON P. BRUSIL ming a support therefor

Images