GB1586420A – Fuel pumping apparatus
– Google Patents
GB1586420A – Fuel pumping apparatus
– Google Patents
Fuel pumping apparatus
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Publication number
GB1586420A
GB1586420A
GB2382078A
GB2382078A
GB1586420A
GB 1586420 A
GB1586420 A
GB 1586420A
GB 2382078 A
GB2382078 A
GB 2382078A
GB 2382078 A
GB2382078 A
GB 2382078A
GB 1586420 A
GB1586420 A
GB 1586420A
Authority
GB
United Kingdom
Prior art keywords
closure member
housing
projection
peripheral portion
outer peripheral
Prior art date
1978-03-04
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2382078A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1978-03-04
Filing date
1978-05-30
Publication date
1981-03-18
1978-05-30
Application filed by Robert Bosch GmbH
filed
Critical
Robert Bosch GmbH
1981-03-18
Publication of GB1586420A
publication
Critical
patent/GB1586420A/en
Status
Expired
legal-status
Critical
Current
Links
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Classifications
F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
F02M37/04—Feeding by means of driven pumps
F02M37/08—Feeding by means of driven pumps electrically driven
Description
(54) FUEL PUMPING APPARATUS
(71) We, ROBERT BOSCH GMBH of
Postfach 50, 7000 Stuttgart 1, Federal Republic of Germany, a limited liability company organised under the laws of the Federal Republic of Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The present invention relates to a fuel pumping apparatus.
Fuel pumping apparatus for motor vehicle engine usually comprise a pot-shaped housing, which is closed by a lid or closure member at least at one end and within which one or more pump stages are arranged which are driven by a common electrical motor which is likewise disposed within the housing. The stationary parts of each pump stage are stacked in the interior of the housing together with the stationary parts of the electrical motor, thus usually a tubular mounting part, comprising magnetically conducting material, for the magnetic part of the electrical motor and of the brush holder plate. The stationary parts are held by the clamping pressure of the closure member which in its turn is held by a projection or bead of the housing.
It is a disadvantage that the closure member although exposed to appreciable loadings when the pumping apparatus is operating, does not, however, have any protection against rotation. For protection against rotation, special ribs have to be arranged on the closure member, into which ribs housing parts are pressed or sheared in a separate operation step.
According to the present invention there is provided a fuel pumping apparatus comprising a housing accommodating at least one pump and having an annular end portion and a closure member closing off the end portion, wherein the end portion comprises an annular projection and the closure member comprises a non-circular outer peripheral portion which bearingly co-operates with the annular projection so as to resist relative rotation between the housing and the closure member during normal use of the apparatus.
The housing may contain a pumping element and an electrical drive element.
The housing may be at least in part pot-shaped.
The outer peripheral portion of the closure member may comprise at least one radial depression and radial protruberance.
The outer peripheral portion of the closure member may be polygonal.
The outer peripheral portion of the closure member may be undulating.
The outer peripheral portion of the closure member may bearingly co-operate with the annular projection of the housing by means comprising magnetism.
The outer peripheral portion of the closure member may bearingly co-operate with the annular projection of the housing by means comprising rubber pad means.
An embodiment of the present invention will now be more particularly described by way of example and with reference to the accompanying drawings in which:
Figure 1 shows a fuel pumping apparatus in a side elevation in which the connecting region of the housing with the closure member and the closure member itself are illustrated in section;
Figure 2 shows the closure member in side elevation; and
Figure 3 shows the closure member in plan view.
Referring to the accompanying drawings, the embodiment shown is suitable for incorporation in the fuel supply system of a motor vehicle engine and comprises an outer pot-shaped housing 1 which receives at least one rotary pump unit and preferably an electrical motor to drive the pump unit or units. Figure 1 shows in detail the region important to the present invention, which region is where the closure member is attached to the housing. Disposed at the left end of the housing as seen in Figure 1 is an integral suction connection 2 connected to a fuel hose 3. Starting from the left hand end of the housing 1 the pump elements and electrical drive elements or motor may comprise one or more rotary fuel pumps and an electrical motor connected thereto, a brush carrier plate of the motor being indicated by reference numeral 4.The right hand end of the housing as shown in Figure 1 is closed off by a closure member 5 which carries a pressure connection stub 6 provided with a non-return valve 7. The closure member 5 is fastened by a projection in the form of beading 8 at this open end of the housing 1. The closure member 5 comprises, in the region of the projection 8, a radially outwardly projecting annular flange 10, which shape-locking bears against the projection 8 of the housing and absorbs the axial pressure forces of the clamping-in. The flange 10 is connected to an inner cylindrical end region 9, against which the brush carrier plate 4 and other components (magnetic holding tube) of the fuel pumping apparatus may bear. A further peripheral part 11 of the closure member 5, against which the impressed projection 8 of the housing 1 bears, is inwardly stepped from the flange 10.The projection 8 therefore grips behind the flange 10 and also bears annularly against the upper peripheral part 11 in a right-angled/obtuse-angled step. This upper peripheral part of ring part 11 of the closure member 5 has a non-circular configuration or profile which is uniformly distributed around the circumference of the part 11.
The profile comprises radial depressions ila and radial protuberances 1 lib and in the most general case this profile would be polygonal, i.e. multi-cornered.
Such a profile is shaped by simple castingon during the production of the closure member which is produced as a die-cast member of a suitable material such as aluminium. In the final assembly, the housing portion intended for the projection 8 is pressed into this profile with the aid for example of a rubber pad and/or by magnetic shaping. Since the projection 8 bears flush against the part 11 of the closure member it assumes a shape complementary to the profile of the part 11 and therefore an absolutely rigid and rotationally secure connection results, which securely resists loosening of the closure member 5 or rotation thereof.
An advantage of the embodiment of the present invention described above is that the production of the closure member as a special component can be undertaken more favourably in cost since ribs for protection against rotation are dispensed with and the shaping-on of for example a peripheral portion with a polygonal configuration requires no significant additional effort. Also a separate operating step of shearing-in projecting housing parts is no longer required. Resistance against rotation of the closure member is attainable in one operating step.
WHAT WE CLAIM IS:
1. A fuel pumping apparatus comprising a housing accommodating at least one pump and having an annular end portion and a closure member closing off the end portion, wherein the end portion comprises an annular projection and the closure member comprises a non-circular outer peripheral portion which bearingly co-operates with the annular projection so as to resist relative rotation between the housing and the closure member during normal use of the apparatus.
2. An apparatus as claimed in claim 1, wherein the housing contains a pumping element and an electrical drive element.
3. An apparatus as claimed in claim 1 or claim 2, wherein the housing is at least in part pot-shaped.
4. An apparatus as claimed in any one of the preceding claims, wherein the outer peripheral portion of the closure member comprises at least one radial depression and radial protruberance.
5. An apparatus as claimed in any one of the preceding claims, wherein the outer peripheral portion of the closure member is polygonal.
6. An apparatus as claimed in any one of claims 1 to 4, wherein the outer peripheral portion of the closure member is undulating.
7. An apparatus as claimed in any one of the preceding claims, wherein the outer peripheral portion of the closure member bearingly co-operates with the annular projection of the housing by means comprising magnetism.
8. An apparatus as claimed in any one of the preceding claims, wherein the outer peripheral portion of the closure member bearingly co-operates with the annular projection of the housing by means comprising rubber pad means.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (9)
**WARNING** start of CLMS field may overlap end of DESC **. an electrical motor to drive the pump unit or units. Figure 1 shows in detail the region important to the present invention, which region is where the closure member is attached to the housing. Disposed at the left end of the housing as seen in Figure 1 is an integral suction connection 2 connected to a fuel hose 3. Starting from the left hand end of the housing 1 the pump elements and electrical drive elements or motor may comprise one or more rotary fuel pumps and an electrical motor connected thereto, a brush carrier plate of the motor being indicated by reference numeral 4. The right hand end of the housing as shown in Figure 1 is closed off by a closure member 5 which carries a pressure connection stub 6 provided with a non-return valve 7.The closure member 5 is fastened by a projection in the form of beading 8 at this open end of the housing 1. The closure member 5 comprises, in the region of the projection 8, a radially outwardly projecting annular flange 10, which shape-locking bears against the projection 8 of the housing and absorbs the axial pressure forces of the clamping-in. The flange 10 is connected to an inner cylindrical end region 9, against which the brush carrier plate 4 and other components (magnetic holding tube) of the fuel pumping apparatus may bear. A further peripheral part 11 of the closure member 5, against which the impressed projection 8 of the housing 1 bears, is inwardly stepped from the flange 10. The projection 8 therefore grips behind the flange 10 and also bears annularly against the upper peripheral part 11 in a right-angled/obtuse-angled step.This upper peripheral part of ring part 11 of the closure member 5 has a non-circular configuration or profile which is uniformly distributed around the circumference of the part 11. The profile comprises radial depressions ila and radial protuberances 1 lib and in the most general case this profile would be polygonal, i.e. multi-cornered. Such a profile is shaped by simple castingon during the production of the closure member which is produced as a die-cast member of a suitable material such as aluminium. In the final assembly, the housing portion intended for the projection 8 is pressed into this profile with the aid for example of a rubber pad and/or by magnetic shaping. Since the projection 8 bears flush against the part 11 of the closure member it assumes a shape complementary to the profile of the part 11 and therefore an absolutely rigid and rotationally secure connection results, which securely resists loosening of the closure member 5 or rotation thereof. An advantage of the embodiment of the present invention described above is that the production of the closure member as a special component can be undertaken more favourably in cost since ribs for protection against rotation are dispensed with and the shaping-on of for example a peripheral portion with a polygonal configuration requires no significant additional effort. Also a separate operating step of shearing-in projecting housing parts is no longer required. Resistance against rotation of the closure member is attainable in one operating step. WHAT WE CLAIM IS:
1. A fuel pumping apparatus comprising a housing accommodating at least one pump and having an annular end portion and a closure member closing off the end portion, wherein the end portion comprises an annular projection and the closure member comprises a non-circular outer peripheral portion which bearingly co-operates with the annular projection so as to resist relative rotation between the housing and the closure member during normal use of the apparatus.
2. An apparatus as claimed in claim 1, wherein the housing contains a pumping element and an electrical drive element.
3. An apparatus as claimed in claim 1 or claim 2, wherein the housing is at least in part pot-shaped.
4. An apparatus as claimed in any one of the preceding claims, wherein the outer peripheral portion of the closure member comprises at least one radial depression and radial protruberance.
5. An apparatus as claimed in any one of the preceding claims, wherein the outer peripheral portion of the closure member is polygonal.
6. An apparatus as claimed in any one of claims 1 to 4, wherein the outer peripheral portion of the closure member is undulating.
7. An apparatus as claimed in any one of the preceding claims, wherein the outer peripheral portion of the closure member bearingly co-operates with the annular projection of the housing by means comprising magnetism.
8. An apparatus as claimed in any one of the preceding claims, wherein the outer peripheral portion of the closure member bearingly co-operates with the annular projection of the housing by means comprising rubber pad means.
9. A fuel pumping apparatus substan
tially as hereinbefore described with reference to the accompanying drawings.
GB2382078A
1978-03-04
1978-05-30
Fuel pumping apparatus
Expired
GB1586420A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19782809382
DE2809382A1
(en)
1978-03-04
1978-03-04
FUEL FEED PUMP
Publications (1)
Publication Number
Publication Date
GB1586420A
true
GB1586420A
(en)
1981-03-18
Family
ID=6033562
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2382078A
Expired
GB1586420A
(en)
1978-03-04
1978-05-30
Fuel pumping apparatus
Country Status (2)
Country
Link
DE
(1)
DE2809382A1
(en)
GB
(1)
GB1586420A
(en)
1978
1978-03-04
DE
DE19782809382
patent/DE2809382A1/en
not_active
Withdrawn
1978-05-30
GB
GB2382078A
patent/GB1586420A/en
not_active
Expired
Also Published As
Publication number
Publication date
DE2809382A1
(en)
1979-09-13
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Legal Events
Date
Code
Title
Description
1981-12-02
CSNS
Application of which complete specification have been accepted and published, but patent is not sealed
