close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2126985

код для вставки
Aug. 16, 1938.
T. V. BUCKWALTER
2,126,985
INJECTION PUMP
Filed Febv. l, 1935
mzó_
j,
.f
\
5 Sheets-Sheet 2
Aug. V16, 1938.
T. v. BUcKwALTER
2,126,985
FUEL INJECTION PUMP
Filed Feb. l, 1955
-
3 Sheets-Sheet 3
»wir
s
.
à
\\\
„\\\\\\\\
.
v
/N VENTO/a
l
l
Patented Aug. 16, 1938 ‘Y
- 2,126,985-
vUNITED STATES
.PATENT oFFlcE '
2,126,985
g
FUEL INJECTION PUMP
, Tracy V. Buckwaltcr, Canton, Ohio, assigner to
The Timken Roller Bearing Company, Canton,
Ohio, a corporation of Ohio
Application February 1, 1935, Serial No. 4,442
13 Claims. (Cl. 103-41)
My invention relates to fuel injection pumps
Each pump cylinder 5 has an enlarged collar
for, internal combustion engines of the Diesel type. portion 1 seated on a shelf formed in the housing
It has for its principal objects to simplify the I. As shown in Fig. 3, each cylinder is provided
construction of such pumps, to decrease the di
in' its outer surface with notches 8 that face one
mensions thereof and to improve the operation side wall of the housing and are engagedby the 5
thereof, particularly as respects the rotary ad-l ends of screws 9 mounted in said side wall and
justment of theV pump plunger.
The invention consists in the fuel injection
pump, and in the parts and combinations and ar
i rangements of parts hereinafter described and
claimed.
part of this specification, and wherein like nu
merals refer to like parts wherever they occur,
Fig. 1 is a central vertical section through a
fuel pump embodying my invention, the plunger
being shown at the end of its suction stroke,
Fig. 2 is a view similar to Fig. 1 with the
plunger shown at the end of its compression
stroke,
screws.' the angular position of the cylinder in
the housing may be very accurately adjusted.
Fig. 9 illustrates a modified form of cylinder ad- l0
justing means wherein the cylinder is provided
In the accompanying drawings, which form
i
provided with lock nuts I0. By means of these
.
vided with lock nuts Illa.
l5
Extending through the housing I are a longi
tudinal passageway I2, receiving liquid fuel from
a fuel feed pump (not shown) and communi
cating with a transverse feed opening I3 through
the lwall of each cylinder 5, and alongitudinal 20
Y
Figs. 3, 4, 5, 6 and 7 are horizontal sections on
the lines 3-3, I-I, 5-5, 6_6, 1-1, respectively,
in Fig. l,
with notches 8a forming a rib II whose opposite
sides are engaged by adjusting screws 9a mounted
in _the opposite side walls of the housing and pro
,
passageway I4 for overñow fuel. Said overiiow
passageway communicates with a transverse
overflow opening I5 in the wall of each cylinder
Fig. 8 is a view showing in side elevation the
i plunger, cylinder and regulating sleeve in assem
bled relation and the disassembled plunger bush»
opposite the inlet opening I3. The inlet opening
I3'and the overilow opening I5 are preferably 25
disposed at different levels. The plungers 6 are
ing, regulating sleeve retainer, regulating sleev
of the general type provided with a recessed por
tion I6 having an inclined wall and communi
cating with a peripheral recess I1, whereby the
effective feed stroke of the plunger may be reg- 30
spring follower and tappet,
'
Fig. 9 is a horizontal cross-section, similar to
i Fig. 3, showing a ,modified arrangement for ad
justing the pump cylinder,
Fig. 10 is a view of the lower end of the pump
plunger, showing a modiñed arrangement for se
i
curing the split plunger bushing thereto,
A
Fig. 11 is an inner side view of one of the sec
tions of the split bushing shown in Fig. 10, \
Fig. 12 is a horizontal sectional view on the
line I2-I2 in Fig. 10,
Fig. 13 is a fragmentary vertical central sec
l tion through a pump provided with a plunger
rotating mechanism ,of modified form,
Fig. 14 isàa horizontal section on the line
I4-I4 in Fig. 13; and
.
Fig. 15 is a side view of the regulating sleeve
i shown in-Fig. 13.
_
.
uiated by varying the angular position thereof.
The bore of the cylinder 5 is of even diameter
throughout its length; and a fuel discharge valve '
I8 is seated in the upper end of said cylinder.
Fitting over the end of the cylinder is a hollow 35
shell I9 threaded into the upper end of the hous
ing I and seated against a gasket 20 on the top
of the collar 1 of said cylinder. In the upwardly
extending Kportion of the shell I9 is mounted a
spring 2I,fwhich normally holds the fuel dis- 40 '
charge valve I8 against a beveled seat 22 proyided
therefor in the upper end of the cylinder 5. A
fuel discharge pipe 23 has a conical tip 2l that
is seated in a conical counterbore in the end of
said shell and the end of said discharge pipe is 45
'I‘he working parts of- the pump are enclosed
in a housing I whichk has an enlarged bottom
onto the end of said shell and having a flange
chamber 2 extending longitudinally of the hous
overlapping the shoulderformed by the tip por
ing and enclosing a ycam` shaft- 3 upon which is
i provided a cam or tappet 4 for each pump plunger
held in -position by.~ means of a cap 25 threaded
tion .of said pipe. .
Mounted in each vertical bore of said housing 50
is a> tappet cup 26. whose bottom is engaged by
_or«piston. The housing is provided _with verti
cal bores that communicate Vwith the longitudinal
thecam or tappet 4 on said cam shaft 3.
chamber 2 and eachof which contains a pump
ed in the tappet cup 26 is a cup follower member f
cylinder 5 and plunger 6 together with actuating
i devices for the plunger.
’
Mount
21 that has driving engagement with the lower
portion of the plunger and that also has a driv- 55
2
2,126,985
ing engagement with said tappet cup as by
The above described construction has many
advantages. It is very simple and it provides
straddle upwardly extending tongues 29 on said _ an eifective drive for rotating the piston. The
- tappet member. The tappet cup 26 also has driv
parts are adequately lubricated including the
ing engagement with a rotary sleeve 30 mounted in tappet mechanism and the wear will be distributed
the upper portion of said vertical bore and hav
over the bottom of the tappet cup by reason of
ing a portion of its periphery toothed, as at 3|, its oscillating movement. The fuel discharge
to cooperate with the teeth of a rack 32 mounted valve is mounted directly in the head of the cyl
in a longitudinal recess in said housing l. Said inder and the cylinder is accurately positioned
10 toothed driving sleeve may be provided with .a
and is held _against rotary movement in either
means of notches 28 in the follower member that
cap 33 at its upper end, said cap having a retaining
tongue 33a bent into a recess 34 in the upper end
of the _outer wall of said driving sleeve 30. A
_ spring 35 is interposed between the sleeve retain
15 ing cap 33 and the cup follower 21, so that the
direction.
_
-
Obviously, numerous changes may be made
without departing from the spirit of my invention
and, therefore, I do not wish to be limited to the
precise arrangement shown and described.
driving sleeve 30 is held upwardly in the housing
What I claim is:
and said cup follower and the tappet cup 26 are
1. A fuel injection pump comprising a housing,
held downwardly in the‘housing. Preferably, the
driving connection between the tappet cup 26
20 and the driving sleeve 30 comprises the project
ing tongues 29 on said cup and cooperating grooves
3B in the outer face of said sleeve.
l
As shown in Figs. 1 and '1, the plunger 6 has
areversely tapered portion 31 of reduced diam
V25 eter, whose middle or smallest portion is sub
stantially square in cross-section. A split bush
or sleeve 38 is mounted on the lower end of the
plunger and has a squared upper end that' ñts
the squared portion 31 of said plunger and forms
30 a driving connection therewith. The follower cup
21 has a central annular boss 21a that is squared
to iit the bush 38 and thus form a. driving con
l
a cylinder therein, a piston reciprocable in said
cylinder and projecting therebelow, a sleeve mem
ber rotatably mounted in said housing con- 1
centric with said cylinder, a tappet cup member
secured to the projecting portion of said piston
below and in endwise alinement with said sleeve,
and a tappet for actuating said tappet cup, the
wall of one of said sleeve and tappet cup mem
bers having circumferentially spaced'longitudi
nal extensions that engage correspondingly spaced
recesses in the other of said members, so as to
permit relative axial movement but prevent rela
tive rotary movement of said members.
2. A fuel injection pump comprising a housing,
a cylinder therein, a piston reciprocable in said
cylinderA and projecting therebelow, a sleeve ro
tatably mounted in said housing concentric with
_said cylinder, a cup member secured to the pro
jecting portion ,of said piston, a tappet cup in
nection between said bush and the tappet cup 2B.
As shown in Figs. 10, 11 and 12, the reversely
35 tapering reduced portion of the plunger may be
provided with serrations 39 that cooperate with
internal serrations 40 in the two half rings of a which said cup is nested and interlocked, and a
bush 38a to form the driving connection between _ tappet for actuating said tappet cup, said sleeve
said bush and said plunger.
and said tappet cup having cooperating tongue
40 'The housing I is provided with a longitudinal and slot portions permitting relative axial move- .
lubricant passageway 4I above the bottom cham
ment but preventing relative rotary movement.
ber 2, said passageway opening into the vertical
3. A fuel injection pump comprising a hous
bore for each tappet cup. As shown in Fig. 7, ing, a cylinder therein, a piston reciprocable in
a peripheral groove 42 communicates with this said cylinder and projecting therebelow, said pis
45 longitudinal passageway and extends around each ~ton having a reversely tapered reduced portion
tappet cup’26. Thus oil is fed onto the periphery on its projecting lower end portion, a sleeve ro
of each tappet cup and the reciprocation of said tatably mounted in said housing concentric with
cup causes the oil to work upwardly and down
wardly. Some of the upwardly working oil passes
50 into the follower member 21 and thence through
holes 43 in the bottom thereof into the tappet
cup 26 which is also provided with holes 44
through its bottom so that the oil may work its
way onto the tappet member 4.
'
said cylinder, a follower cup fixed on said re
duced portion of said piston, and a tappet cup in
which said follower cup is nested and interlocked,
said sleeve and said tappet cup having cooperat
ing tongue and slot portions permitting relative
axial movement but preventing relative rotary
movement.
_
.
In the modification shown in Figs. 13 to 1_5, the
tappet cup 26a is provided with upwardly ex
tending tongues 29a that slidably engage down
wardly opening notches 36a. provided therefor in
the regulating sleeve 30a. Said sleeve is held
upwardly in the bore provided therefor in the
4. A fuel injection pump comprising a hous
ing, a cylinder therein, a piston reciprocable in
said cylinder and projecting therebelow, said
projecting portion of said piston being generally
pump housing l a by means of a screw 45 that- is
« threaded into the wall of said housing with its
a bush nonrotatably ñxed on said reduced por
tion and a cup nonrotatably ñxed on said bush,
a tappet cup in which said cup is nested and
55
inner end seated within -a groove 34a provided
therefor in said sleeve. A direct driving con
65 nection is formed between the tappet cup 26a
and the plunger 6a by means of a squared or
flat-sided head 46 at the lower end of said plung
er that seats within a similarly shaped recess 41
of the same size as the portion thereof in said
cylinder and having a portion of reduced size,
.interlocked and means for rotating said -tappet
cu
.
ä. A fuel injection pump comprising a hous
ing, a cylinder therein, a piston reciprocable in
said cylinder and projecting therebelow, said pro
provided therefor-in the bottom of said tappet
jecting portion of said piston being generally of
70 cup. The lower end of the plunger retracting
spring 35a. bears against a plate 48 which is
slipped over the working end of the plunger and
bears against a collar 49 provided therefor on
the same size as the portion thereof in saidcylin
der and having a portion of reduced size, a
bush nonrotatably fixed on said reduced Vportion
and a cup nonrotatably iixed on said bush, >a
sleeve rotatably mounted in said housing concen
said plunger just above the squared end portion
75 46 thereof.
tric with~ said cylinder, a tapped cup in which said
3
2,126,985
cup is nested and interlocked and a tappet for
actuating said tappet cup, said sleeve and said
10. A fuel injection pump comprising a hous
ing, a cylinder therein, a piston reciprocable in
tappet cup having cooperating tongue and socket
portions permitting relative axial movement but
preventing relative rotary movement.
said cylinder and projecting therebelow, said pis
ton having a reversely tapered reduced portion
6. A fuel injection pump comprising _a hous
ing, a cylinder therein, a piston reciprocable in
said cylinder and projecting therebelow, said pro
tatably mounted in said housing concentric with
said cylinder, a follower cup nonrotatably mount
ed on said reduced portion of said piston, a tap
jecting portion of said piston being generally of
pet cup in which said follower cup' is nested and
10 the same size as the portion thereof in said cyl
inder and having a tapered portion of reduced
size, a tapered bush nonrotatably fixed on said
reduced portion and a cup nonrotatably fixed
on said bush, a tappet cup in which said cup
is nested and interlocked, a sleeve rotatably
mounted in said housing concentric with said cyl
inder, said sleeve and said tappet cup having
interlocked, a tappet cooperatingäfwith said tap 10
pet cup, said sleeve and said tappet cup hav
ing cooperating tongue and slot portions permit
ting relative axial movement but preventing rela
tive rotary movement, a cap mounted in the top
7. A fuel injection pump comprising a hous
ing, a cylinder therein, a piston reciprocable in
of said sleeve, said sleeve having a notch near its
top and said cap having a securing tongue ex
tending into said notch thereby holding said cap
on said sleeve and closing the end of said sleeve
and a spring interposed between said cap and
said follower cup, forcing said sleeve upwardly 20.
and forcing said follower cup downwardly to
hold said tappet cup in engagement, with the
said cylinder and projecting therebelow, said .pis
tappet.
' cooperating tongue and slot portions, and a spring
pressing said sleeve upwardly and said cup and
20
on.its projecting lower endportion, a sleeve ro
tappet cup downwardly.
‘
ton having a reversely tapered reduced portion
11. A fuel injection pump comprising a hous
25 on its projecting lower end portion, a split bush ing, a cylinder therein, a piston reciprocable in
nonrotatably mounted on said reversely tapered ` said cylinder and projecting therebelow, a sleeve
reduced portion of said piston, a sleeve rotatably rotatably mounted in said housing concentric
mounted in said housing concentric with said cyl
with said cylinder, means connecting said sleeve
inder, a cup nonrotatably connected with said
30 bush for rotary and axial movement therewith;
said sleeve and said cup having cooperating
tongue and slot portions permitting relative axial
movement but preventing relative rotary move
ment, a cap closing the top of said sleeve, a spring
35 interposed between said cap' and said cup, forc
ing said sleeve upwardly and said cup down
wardly and means for‘moving said cup upwardly.
8. A fuel injection pump comprising a hous
ing, a cylinder therein, a piston reciprocable in
40 said cylinder and projecting therebelow, a sleeve
rotatably mounted in said housing concentric with
said cylinder, a cup` operatively connected with
said piston for rotary and axial movement there
with, said sleeve and said cup having cooperat
45 ing portions permitting relative axial movement
but preventing relative rotary movement, a cap
ñxed to the top of said sleeve, a spring inter
posed between said cap and said cup, forcing said
sleeve upwardly and said cup downwardly and
50 means for moving said cup upwardly.
9. A fuel injection pump comprising a hous
ing, a cylinder therein, a piston reciprocable in
and said piston permitting relative axial move
ment but preventing relative rotary movement, 30
a cap mounted on top of said sleeve, said sleeve
having a notch near its top and said cap having a
securing tongue extending into said notch there
by holding said cap on said sleeve, and a spring
interposed between said piston and said sleeve
with its upper end in engagement with said cap
and with-its lower end in engagement with a
portion of said connecting means.
.
12. A fuel injection pump comprising a hous
ing, a cylinder therein, a piston reciprocable in
said cylinder and projecting therebelow, a sleeve
rotatably mounted in said housing concentric
with said cylinder, a tappet cup secured to the
projecting portion of said piston below and in
endwise alinement with said sleeve, and a tap
pet for actuating said tappet cup, the outer face
of said sleeve «being provided with circumferen
tially spaced longitudinal grooves and the upper
end of said tappet cup being provided'with cor
respondingly spaced upwardly extending tongues
said cylinder and projecting therebelow, said pis
that slidably engage said grooves, thereby per
mitting relative axial movement but preventing
relative rotary movement of said sleeve and tap
ton having a reversely tapered reduced portion
pet cup.
55 on its projecting lower end portion, a split bush
nonrotatably mounted on said reversely tapered
reduced portion of said piston, a sleeve rotatably
mounted’in said housing concentric with said
cylinder, a follower cup nonrotatably connected
60 with said bush for rotary and axial movement
therewith, a tappet cup in which said follower
cup is nested and interlocked, a tappet engag
ing the underside of said tappet cup, said sleeve
and said tappet cup having cooperating tongue
65 and slot portions permitting relative axial move
ment but preventing relative rotary movement,
a cap -closing the top of said sleeve and a.
spring interposed between said cap and said fol
lower cup, forcing said sleeve upwardly and forc
ing’ said follower cup downwardly to hold said
tappet cup in engagement with the tappet.
.
13. A fuel injection pump comprising a hous 55
ing provided with a bore, a cylinder supported
in the upper end portion of said bore, a piston re
ciprocable in said cylinder and projecting there
below, a sleeve journaled in said bore, a tappet
cup nonrotatably secured to the projecting por
tion of said piston below and in endwise aline
ment with said sleeve and rotatably supported in
said bore, and a tappet for actuating said tap
pet cup, the opposing ends ofthe walls°of said
sleeve and said tappet cup being provided with 65
cooperating tongues and notches permitting rel
ative axial movement but preventing relative ro
tary movement of said sleeve and said tappet cup l
in said bore.
'
.
TRACY V.' BUCKWALTER.
70
Документ
Категория
Без категории
Просмотров
0
Размер файла
749 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа